The invention relates to a method for connection establishment and a radio system relaying packet traffic. A terminal informs the system that it wishes to transmit data. The network part receives the message and allocates default radio resources and informs the allocated resources to the terminal. The terminal sends a first control message to inform the terminal's radio path characteristics. According to the solution of the invention, when allocating the default amount of radio resources to the terminal, the network part is arranged to reserve one or more radio blocks for the terminal's control messages. When the terminal sends the network part information about its radio path characteristics, it is arranged to inform in the message if there are additional characteristics. In that case, the terminal sends a second control message including information about its radio path characteristics.
|
0. 21. A terminal communicating packet-switched traffic, the terminal comprising:
a control unit and an associated transmitter and receiver configured to:
send a packet channel request message to a network part;
receive from the network part a packet uplink assignment message comprising information indicating radio resources allocated to the terminal and information requesting radio characteristics supported by the terminal; and
send a packet resource request message comprising information indicating the radio characteristics and information indicating whether additional radio characteristics will be reported.
0. 58. A non-transitory computer-readable medium having instructions stored thereon, the instructions comprising:
instructions to receive a packet channel request message from the terminal;
instructions to send to the terminal a packet uplink assignment message comprising information indicating radio resources allocated to the terminal and information requesting radio characteristics supported by the terminal; and
instructions to receive a packet resource request message from the terminal comprising information indicating the radio characteristics and information indicating whether additional radio characteristics will be reported.
0. 44. A method performed by a terminal communicating packet-switched traffic, the method comprising:
sending to a network part a packet channel request message indicating that the terminal intends to send data to the network part;
receiving from the network part a packet uplink assignment message comprising information indicating radio resources allocated to the terminal and information requesting radio characteristics supported by the terminal; and
sending a packet resource request message comprising information indicating the radio characteristics and information indicating whether additional radio characteristics will be reported.
0. 55. A network part communicating packet-switched traffic to a terminal, the network part comprising:
a control unit and an associated transmitter and receiver configured to:
receive a packet channel request message from the terminal;
send to the terminal a packet uplink assignment message comprising information indicating radio resources allocated to the terminal and information requesting radio characteristics supported by the terminal; and
receive a packet resource request message from the terminal comprising information indicating the radio characteristics and information indicating whether additional radio characteristics will be reported.
0. 33. A non-transitory computer-readable medium having instructions stored thereon, the instructions comprising:
instructions to send a packet channel request message to a network part to indicate that a terminal intends to send data to the network part;
instructions to receive from the network part a packet uplink assignment message comprising information indicating radio resources allocated to the terminal and information requesting radio characteristics supported by the terminal;
instructions to send a packet resource request message comprising information indicating the radio characteristics and information indicating whether additional radio characteristics will be reported; and
instructions to send an additional radio access capabilities message comprising information indicating the additional radio characteristics.
0. 1. A terminal of a radio system relaying packet-switched traffic, the system comprising a network part, the terminal being configured to:
inform the network part that the terminal intends to send data to the network part;
receive from the network part information about radio resources allocated to the terminal and a query regarding the terminal's radio path characteristics on a specific frequency band supported by the terminal;
send a first control message to inform the network part of the terminal's radio path characteristics, the message comprising information on whether there are additional radio path characteristics; and
send a second control message comprising information about the terminal's additional radio path characteristics.
0. 2. The terminal of
0. 3. The terminal of
0. 4. The terminal of
0. 5. The terminal of
0. 6. The terminal of
0. 7. The terminal of
0. 8. The terminal of
0. 9. The terminal of
0. 10. The terminal of
0. 11. A network part of a radio system relaying packet-switched traffic the network part being configured to:
receive from a terminal information indicating that the terminal intends to send data to the network part;
allocate a default amount of radio resources to the terminal;
reserve one or more radio blocks for the terminal's control messages;
inform the terminal about radio resources allocated to the terminal and query the terminal about the terminal's radio path characteristics on a specific frequency band supported by the terminal when informing the terminal about the default amount of allocated resources;
receive a first control message from the terminal, the message comprising information about the terminal's radio path characteristics and information on whether there are additional radio path characteristics; and
receive a second control message from the terminal, the message comprising information about the terminal's additional radio path characteristics.
0. 12. The network part of
0. 13. The network part of
0. 14. The network part of
0. 15. The network part of
0. 16. The network part of
0. 17. The network part of
0. 18. The network part of
0. 19. The network part of
0. 20. The network part of
0. 22. The terminal of claim 21, wherein the control unit and the associated transmitter and receiver are further configured to send an additional radio access capabilities message comprising information indicating the additional radio characteristics.
0. 23. The terminal of claim 22, wherein the control unit and the associated transmitter and receiver are further configured to, if all the radio characteristics have been sent in the packet resource request message, send data in place of the additional radio access capabilities message.
0. 24. The terminal of claim 21, wherein the control unit and the associated transmitter and receiver are further configured to send data to the network part with the allocated radio resources after the terminal has received, from the network part, the information indicating the allocated radio resources.
0. 25. The terminal of claim 21, wherein the information request received from the network part simultaneously inquires about the radio characteristics when the network part indicates to the terminal of a default amount of allocated radio resources.
0. 26. The terminal of claim 21, wherein the radio characteristics comprise information about frequency ranges supported by the terminal.
0. 27. The terminal of claim 21, wherein the radio characteristics comprise information about the terminal's capability to communicate using a plurality of time slots.
0. 28. The terminal of claim 21, wherein the information requesting radio characteristics indicates at least one frequency band.
0. 29. The terminal of claim 28, wherein the packet resource request message comprises information indicating the radio characteristics relating to frequency bands supported by the terminal.
0. 30. The terminal of claim 29, wherein the control unit and the associated transmitter and receiver are further configured to send an additional radio access capabilities message comprising information indicating the additional radio characteristics relating to one or more frequency bands.
0. 31. The terminal of claim 21, wherein the control unit and the associated transmitter and receiver are further configured to use a training sequence to inform the network part of a type of resources needed when the terminal informs the network part that the terminal intends to send data to the network part.
0. 32. The terminal of claim 21, wherein the allocated resources comprise one or more radio blocks.
0. 34. The non-transitory computer-readable medium of claim 33, further comprising instructions to send data to the network part using the allocated radio resources after the receiving, from the network part, the information indicating the allocated radio resources.
0. 35. The non-transitory computer-readable medium of claim 33, wherein the information request received from the network part simultaneously inquires about the radio characteristics when the network part indicates to the terminal of a default amount of allocated radio resources.
0. 36. The non-transitory computer-readable medium of claim 33, wherein the radio characteristics comprise information about frequency ranges supported by the terminal.
0. 37. The non-transitory computer-readable medium of claim 33, wherein the radio characteristics comprise information about the terminal's capability to communicate using a plurality of time slots.
0. 38. The non-transitory computer-readable medium of claim 33, wherein the information requesting radio characteristics indicates at least one frequency band.
0. 39. The non-transitory computer-readable medium of claim 38, wherein the packet resource request message comprises information indicating the radio characteristics relating to frequency bands supported by the terminal.
0. 40. The non-transitory computer-readable medium of claim 39, wherein the additional radio access capabilities message comprises information indicating the additional radio characteristics relating to one or more frequency bands.
0. 41. The non-transitory computer-readable medium of claim 33, wherein sending the additional radio access capabilities message further comprises sending data in place of the additional radio access capabilities message if all the radio characteristics have been sent in the packet resource request message.
0. 42. The non-transitory computer-readable medium of claim 33, wherein the sending the packet channel request message comprises using a training sequence to inform the network part of a type of resources needed.
0. 43. The non-transitory computer-readable medium of claim 33, wherein the allocated resources comprise one or more radio blocks.
0. 45. The method of claim 44, further comprising sending an additional radio access capabilities message comprising information indicating the additional radio characteristics.
0. 46. The method of claim 45, wherein if all the radio characteristics have been sent in the packet resource request message, sending data in place of the additional radio access capabilities message.
0. 47. The method of claim 44, further comprising sending data to the network part using the allocated radio resources after the terminal has received, from the network part, the information indicating the allocated radio resources.
0. 48. The method of claim 44, wherein the terminal simultaneously receives from the network part the information request about the radio characteristics when receiving a default amount of allocated radio resources.
0. 49. The method of claim 44, wherein the radio characteristics comprise information about frequency ranges supported by the terminal.
0. 50. The method of claim 44, wherein the radio characteristics comprise information about the terminal's capability to communicate using a plurality of time slots.
0. 51. The method of claim 44, wherein the packet resource request message comprises information indicating the radio characteristics relating to at least one frequency band supported by the terminal.
0. 52. The method of claim 51, further comprising sending an additional radio access capabilities message comprising information indicating the additional radio characteristics relating to one or more frequency bands.
0. 53. The method of claim 44, wherein when the terminal informs the network part that the terminal intends to send data to the network part, the terminal uses a training sequence to inform the network part of a type of resources needed.
0. 54. The method of claim 44, wherein the allocated resources comprise one or more radio blocks.
0. 56. The network part of claim 55, wherein the control unit and the associated transmitter and receiver are further configured to receive an additional radio access capabilities message from the terminal comprising information indicating the additional radio characteristics.
0. 57. The network part of claim 55, wherein the packet resource request message comprises information indicating the radio characteristics relating to at least one frequency band supported by the terminal.
0. 59. The non-transitory computer-readable medium of claim 58, further comprising instructions to receive an additional radio access capabilities message from the terminal comprising information indicating the additional radio characteristics.
0. 60. The non-transitory computer-readable medium of claim 58, wherein the packet resource request message comprises information indicating the radio characteristics relating to at least one frequency band supported by the terminal.
|
Notice: More than one reissue application has been filed for the reissue of U.S. Pat. No. 7,167,457. The reissue application numbers are Ser. Nos. 12/357,972, 12/780,358, and the present application.
This application is a continuation reissue of U.S. Reissue patent application Ser. No. 12/780,358, which is a continuation reissue of U.S. Reissue patent application Ser. No. 12/357,972, filed on Jan. 22, 2009 (now U.S. Patent RE41434), which is a reissue application based on U.S. Pat. No. 7,167,457, issued on Jan. 23, 2007, which is a continuation of U.S. patent application Ser. No. 10/021,297, filed Dec. 19, 2001 now U.S. Pat. No. 6,813,280, which is a continuation of International Application PCT/FI00/00551, filed Jun. 20, 2000, which relies for priority on Finnish Application Nos. 991412, filed Jun. 21, 1999 and 19992529, filed Nov. 25, 1999, the contents of all of which are incorporated herein by reference in their entireties.
The invention relates to a radio system relaying packet-switched traffic and to a method for connection establishment in a radio system relaying packet-switched traffic. The invention relates particularly to a radio system where terminals have various radio path characteristics.
A significant shortcoming in current radio systems and in those that are being developed is the limited amount of radio resources available. The number of radio frequencies is restricted and they are distributed among various systems and operators. Numerous different solutions have been created to solve this problem.
Previously developed radio systems meant for public use are based on circuit-switched technology. In systems implemented according to this technology, a specific channel is reserved for the connection between the devices involved, the connection being available to the devices for the entire duration of the connection, irrespective of whether there is traffic on the channel all the time or not. This solution has been sufficient for systems relaying primarily speech. However, with increasing telecommunications needs, transmission connections are used for transmitting data. The traffic relayed on data connections is often highly bursty, i.e., at times data is transferred in large amounts and a lot of transmission capacity is needed on the channel, whereas occasionally the traffic load on the channel is low. From the point of view of capacity deployment, packet-switched transmissions are an extremely good solution for these connections. In packet-switched connections, the channel is not allocated to the terminals for the entire duration of the connection, but the channel is only allocated when data needs to be transferred. Consequently, diverse radio systems employing packet-switched service have been developed, at least some of the connections between the terminals being established using a packet protocol. Among these systems are GPRS (General Packet Radio System) and its enhanced version EGPRS (Enhanced General Packet Radio System).
Since various data services are available and they have differing data transmission needs, many systems include the possibility to establish connections of varying capacity. Moreover, many systems involve diverse terminals which may be provided with highly varying data transmission properties and capability to deploy the resources of the system. For example, different equipment and data transfer capacity is needed for transferring speech, written communications or video. In addition, there may be devices that can only use specific frequency ranges and others that can utilize all the frequencies reserved for the network. Consequently, when a radio connection is to be established, the system should know the type of the terminal that needs the connection and the data transmission capacity. There are also networks that may have different packet system protocols available, such as the GPRS and EGPRS, and, depending on its characteristics, the terminal can use one or the other.
In prior art solutions a terminal that needs to transmit data in packet format contacts the network and informs that it wishes to establish a connection and, at the same time, it informs what kind of a terminal it is, i.e., the radio path characteristics it has. These characteristics include for example the frequencies the device needs for communication, and the transfer modes of different capacities that the terminal can utilize. A prior art signalling for connection establishment is illustrated in
One of the drawbacks of the above method is that it is not possible to know whether the terminal needs GPRS (General Packet Radio System) or EGPRS (Enhanced General Packet Radio System) resources. Another problem is that one allocated block is sufficient for sending one control message, but one control message is not always enough for relaying the radio characteristics of the terminal. Consequently, a terminal having diversified characteristics does not necessarily receive appropriate resources.
The signalling that takes place before data transmission is a multi-step process, i.e., it comprises a plural number of steps depending on the amount of data to be transferred and the amount resources available. When GPRS is used, the signalling can take place either on a PCCCH (Packet Common Control Channel) or a CCCH (Common Control Channel), but with EGPRS only PCCCH can provide efficient signalling. This causes delay in the transmission of the signal and yet the data transmission is not necessarily carried out in an optimal way due to insufficient signalling capacity.
It is therefore an object of the invention to provide a method and a radio system allowing connections between a terminal and a network to be established smoothly and effectively. This is achieved with a connection establishment method of the invention employed in a radio system relaying packet service, in which method the terminal informs the system network part that it wishes to send data to the network part; the network part receives the message and allocates a default amount of radio resources to the terminal; the network part informs the allocated resources to the terminal; the terminal sends a first control message to inform the network part about the terminal's radio path characteristics. According to the method of the invention, when the network part allocates the default amount of radio resources to the terminal, it reserves one or more radio blocks for the terminal's control messages, and when the terminal sends information about its radio path characteristics to the network part, the terminal also informs in the message if there are additional characteristics, and, in that case, the terminal sends a second control message comprising information about the terminal's radio path characteristics.
The invention also relates to a radio system relaying packet-switched traffic, in which system a terminal is arranged to inform the system network part that it wishes to send data to the network part; a network part is arranged to receive the message and to allocate a default amount of radio resources to the terminal; the network part is arranged to inform the allocated resources to the terminal; the terminal is arranged to send a first control message to inform the terminal's radio path characteristics to the network part. According to the system of the invention, when the network part allocates the default number of radio resources to the terminal, the network part is arranged to reserve one or more radio blocks for the terminal's control messages, and when the terminal informs the network part about its radio path characteristics, the terminal is arranged to inform in the message if there are additional characteristics, and, in that case, the terminal is then arranged to send a second control message comprising information about the terminal's radio path characteristics.
According to a preferred embodiment of the invention, after having received the information about the allocated resources from the network part, the terminal starts to send data to the network part, immediately after it has sent the requested control messages using the allocated radio resources.
In another preferred embodiment of the invention, the terminal is allocated a predetermined number of channels immediately after the first channel request. Data transmission can then begin, and, when it begins, the terminal's characteristics are signalled to the network. According to another preferred embodiment of the invention, the network part is arranged to allocate radio resources to the terminal in accordance with the terminal's characteristics, which allows the number of channels to be increased, when necessary.
According to a further preferred embodiment of the invention, the first control message comprises information about the terminal's radio path characteristics preferably with regard to the frequency band the network part first inquired about in the control message it sent. The second control message sent by the terminal informs the terminal's radio path characteristics preferably with regard to all frequency bands available in the network. If there are so many radio path characteristics that they cannot be included even in this message, then new control messages are sent until all the radio path characteristics have been informed within the scope of the allocated resources.
The method and arrangement of the invention provide several advantages. Data transmission can be rapidly initiated and channel deployment becomes more efficient. On the other hand, the network is informed more effectively than before about the terminal's characteristics, which allows an appropriate number of channels to be allocated for a connection. Furthermore, the terminal can be used for sending more information to the network than before, i.e., information from all frequency bands supported by the network and the terminal. Previously the information has been limited to one frequency band alone.
In the following the invention will be described in greater detail in connection with preferred embodiments and with reference to the accompanying drawings, in which
The present invention can be used in various radio systems relaying packet service in which terminals are provided with diverse radio path characteristics. The multiple access method employed in the system is not significant as such. For example, multiple access methods such as CDMA, WCDMA and TDMA can be used. Also, the system can support both circuit- and packet-switched connections.
With reference to
The radio access network consists of base station subsystems BSS. Each BSS comprises a base station controller BSC and one or more base transceiver stations BTS. The interface between the base station controller BSC and the base station BTS has not been standardized. The coverage area of the base station, i.e., a cell, is indicated with 3 C in the Figure.
The description given in
A cellular radio network typically comprises a fixed network infrastructure, i.e., a network part 400, and subscriber terminals 402, which may be fixedly located, vehicle-mounted or portable terminals. The network part 400 comprises base stations 404. A plural number of base stations 404 are, in turn, controlled in a centralized manner by a base station controller 406 communicating with them. The base station 404 comprises transceivers 408 and a multiplexer 412.
The base station 404 further comprises a control unit 410 which controls the operation of the transceivers 408 and the multiplexer 412. The multiplexer 412 arranges the traffic and control channels used by several transceivers 408 to a single transmission connection 414, which forms an interface hub.
The transceivers 408 of the base station 404 are connected to an antenna unit 418 which is used for implementing a bi-directional radio connection 416 to the subscriber terminal 402. The structure of the frames to be transmitted in the bi-directional radio connection 416 is defined separately in each system, the connection being referred to as an air interface Um.
The base station controller 406 comprises a group switching field 420 and a control unit 422. The group switching field 420 is used for connecting speech and data and for combining signalling circuits. The base station 404 and the radio network controller 406 form a radio network subsystem 432 which further comprises a transcoder 424. The transcoder 424 is usually located as close to a mobile services switching centre 428 as possible, because speech can then be transferred in a cellular radio network form between the transcoder 424 and the base station controller 406, which saves transmission capacity.
The transcoder 424 converts different digital speech coding forms used between a public switched telephone network and a radio network to make them compatible, for instance from a fixed network form to another cellular radio network form, and vice versa. The control unit 422 performs call control, mobility management, collection of statistical data and signalling.
As is seen in
The connection between the packet transmission network 442 and the group switching field 420 is established by a SGSN (Serving GPRS Support Node) 440. The function of the support node 440 is to transfer packets between the base station subsystem and a GGSN (Gateway GPRS Support Node) 444, and to keep record of the subscriber terminal's 402 location within its area.
The gateway node 444 connects a public packet transmission network 446 with the packet transmission network 442. An Internet protocol or an X.25 protocol can be used at the interface. The gateway node 444 encapsulates the inner structure of the packet transmission network 442 to conceal it from the public packet transmission network 446, therefore the public packet transmission network 446 sees the packet transmission network 442 as a subnetwork, and the public packet transmission network can address packets to and receive them from the subscriber terminal 402 located in the network.
The packet transmission network 442 is typically a private network employing an Internet protocol and carrying signalling and tunneled user data. Below the Internet protocol layer, both the architecture and protocols of the network structure 442 may vary according to operator.
The public packet transmission network 446 may be for example the global Internet network, to which a terminal 448, such as a server computer, communicating with the network wishes to transfer packets addressed to the subscriber terminal 402.
At the air interface 416 packet transmission typically takes place in time slots not allocated for circuit-switched transmission. Packet transmission capacity is allocated dynamically, i.e., when a data transmission request is received, any free channel may be allocated for packet transmission. The arrangement is flexible, circuit-switched connections having priority over packet transmission connections. When necessary, a circuit-switched connection cancels a packet-switched connection, i.e., a time slot engaged in packet transmission is allocated to a circuit-switched connection. This is possible because packet transmission tolerates such interruptions well: the transmission simply continues in another time slot allocated to the connection. Another possibility to implement the arrangement is that circuit-switched transmissions are not given any absolute priority, but both circuit-switched and packet-switched transmission requests are served in their order of arrival. Such arrangements are not, however, significant to the present invention.
As shown in
The structure of the subscriber terminal 402 can also be described using the description of the transceiver 408 in
In the network part the functions of the invention can be advantageously implemented by software. The software comprising the necessary function commands can be placed at the base station, the radio network controller or in the support node SGSN in a unit that processes RLC-MAC protocol messages. The RLC-MAC messages relate to the protocols used in radio networks, the protocols being typically formed in accordance with the OSI (Open Systems Interconnection) model of the ISO (International Standardization Organization). In the RLC/MAC sublayer (Radio Link Control/Medium Access Control), the RLC part is responsible for segmenting and collecting the data to be transmitted. In addition, the RLC part conceals quality fluctuations in the radio connection of the physical layer from the upper layers. The MAC part allocates traffic channels to and releases them from radio bearers.
Let us now examine the operation of the inventive solution with reference to the flow diagram of
In the first step, the terminal sends a Channel Request CR 600 to the network part. The terminal uses a specific training sequence to indicate to the base station that the channel request in question is specifically of the EGPRS-type. If the request were of a GPRS-type, another kind of training sequence would be used. After having received the message, the network part allocates to the terminal a channel on the radio path for data transmission (step 602) and informs the terminal about the allocated resources by sending an AGCHPUA (Access Grant Channel Packet Uplink Assignment) message 604. The message may also comprise information about the frequencies used in the cell and about the frequency band with regard to which the base station first wishes to know the terminal's characteristics. Moreover, the network part allocates in step 606 one or more radio blocks to the terminal for control messages.
The terminal then sends the network part a PRR (Packet Resource Request) message in a first control block (step 608). The message comprises information about the terminal's radio path characteristics, preferably relating to the frequency band that was requested in the first AGCHPUA message. The PRR message further comprises information stating that the terminal has also other characteristics than those mentioned in the message.
In the next control block in step 610 the terminal sends a second message ARAC (Additional Radio Access Capability) in which the terminal's radio path characteristics are stated preferably with regard to all other frequency bands available in the network. The terminal receives this information in step 604. If the terminal has more characteristics than a single ARAC message can accommodate, several ARAC messages are sent within the resources allocated. The sending of the actual data does not start until the control messages have been sent. In the next phase 612 the terminal starts to send data to the network part, using the radio resources allocated to it.
If necessary, in step 614 the network part re-allocates new resources to the terminal on the basis of the information it has received.
If the terminal does not support other frequency bands than those already mentioned in the first control message, then a second control message is not needed, but data can be sent instead. The network part is able to distinguish data from control messages on the basis of the message headers.
The PRR and the ARAC should both be sent within N blocks from the starting of the data transmission, N being preferably 40. If the transmission is shorter than N blocks, then neither of the control messages is sent.
In a preferred embodiment of the invention, the network part uses step 604, i.e., a message PUA (Packet Uplink Assignment) to ask for information about the frequency ranges and radio path characteristics that the terminal supports. In another preferred embodiment of the invention the network part uses a common signalling channel (also known as a broadcast channel) to inform all terminals located within its are that it wishes the terminals to broadcast information about the frequency ranges and radio path characteristics they support. The control channel can be for example a Broadcast (BCCH) or Packet Broadcast (PBCCH) channel.
Let us then examine the operation of the inventive solution with reference to a flow diagram shown in
In the first phase, the terminal sends the network part a Channel Request CR 600A. The terminal uses a specific training sequence to indicate to the base station that the resource request is specifically of the EGPRS-type. After having received the message, the network part allocates to the terminal a specific number of channels on the radio path for data transmission (step 602A) and informs the terminal about the allocated resources by sending an AGCHPUA (Access Grant Channel Packet Uplink Assignment) message 604. The message may also comprise information about the frequencies used in the cell and about the frequency band with regard to which the base station first wishes to known the terminal's characteristics. In addition, the network part allocates in phase 606A one or more radio blocks to the terminal for control messages.
In the first control block the terminal sends a PRR (Packet Resource Request) message to the network part (step 610A). The message comprises information about the terminal's radio path characteristics, preferably relating to the frequency band that was first requested in the AGCHPUA message. The PRR message also comprises information stating that the terminal has other characteristics than those given in the message.
In the next control block in step 612A the terminal sends a second message ARAC (Additional Radio Access Capability) comprising information about the terminal's radio path characteristics, particularly with regard to all the frequency bands that are available in the network. The terminal received this information in step 604A. As in the previous alternative, also in this case the transmission of the message is optional.
If necessary the network allocates new resources in step 614A to the terminal on the basis of the information it has received.
In the next step 616A the terminal starts to send data to the network part using the radio resources allocated to it.
An advantage of the two-phase allocation method of the invention compared with the prior art two-phase allocation method, which is illustrated in
Let us then examine an example of the structure of the ARAC message containing information about the terminal's radio path characteristics in the preferred EGPRS system:
< Additional Radio Access Capability > ::=
< MESSAGE TYPE : bit (6) >
< Global TFI > :Global TFI IE) >
< L | H < MS Radio Access Capability : MS Radio Access Capability
IE>}
< spare bits > ;
Global TFI is an information element (Temporary Flow Identifier) acting as a message identifier, i.e., it identifies the terminal a message is addressed to. MS Radio Access Capability is an information element comprising the necessary information about the terminal's radio path characteristics.
Let us then examine an example of the structure of the AGPHUA (Access Grant Channel Packet Uplink Assignment) message sent by the network.
< AGCH Packet Uplink Assignment > ::=
< L2 PSEUDO LENGTH : bit (8) >
< PROTOCOL DISCRIMINATOR : bit (4) >
< SKIP INDICATOR : bit (4) >
< MESSAGE TYPE : bit (8) >
< Packet Request Reference : < Packet Request Reference IE > >
{ 0 < AGCH PUA Contents : < AGCH PUA contents struct > >
-- Message not segmented
| 10 < AGCH PUA part 1 contents : bit(134) > -- Segmented, 1st part
| 11 < AGCH PUA part 2 contents : bit(*) > -- Segmented, 2nd part
}
< AGCH PUA contents struct > ::=
{ 00
-- Message escape
< PAGE MODE : bit (2) >
< Frequency Parameters : < Frequency Parameters IE > >
< TIME SLOT NUMBER : bit (3) >
< TA_VALUE : bit (6) >
{ 0 | 1 < ALPHA : bit (4) }
< GAMMA : bit (5)
< Access Technologies Request : Access Technologies Request struct >
{ 0 < Multi Block Allocation : < Multi Block Allocation struct > >
| 1 < One PDCH Allocation : < One PDCH Allocation struct >>
}
< padding bits >
! < Message escape : { 01| 10 | 11 } bit (*) = <no string> > }}; - Extended for future
changes
Access Technologies Request is a list used by the network for requesting the terminal to send information about itself. The elements on the list are preferably frequency ranges, such as 900, 1800, 1900 MHz, etc. The terminal sends information about its radio path characteristics relating to all the frequencies it supports.
Although the invention is described above with reference to an example shown in the attached drawings, it is apparent that the invention is not restricted to it, but may vary in many ways within the inventive idea disclosed in the attached claims.
Rajala, Jussi, Vanttinen, Veijo
Patent | Priority | Assignee | Title |
Patent | Priority | Assignee | Title |
5504939, | Oct 02 1992 | Telefonaktiebolaget LM Ericsson | Communication channel selection in cellular radio communication systems |
5729534, | Jan 09 1995 | Nokia Technologies Oy | Dynamic allocation of radio capacity in a TDMA system |
5742592, | Sep 01 1995 | Google Technology Holdings LLC | Method for communicating data in a wireless communication system |
5870394, | Jul 23 1996 | RPX CLEARINGHOUSE LLC | Method and apparatus for reassembly of data packets into messages in an asynchronous transfer mode communications system |
6031832, | Nov 27 1996 | TELEFONAKTIEBOLAGET LM ERICSSON PUBL | Method and apparatus for improving performance of a packet communications system |
6167248, | Sep 06 1993 | Nokia Technologies Oy | Data transmission in a radio telephone network |
6317418, | Apr 28 1997 | NOKIA SOLUTIONS AND NETWORKS OY | Method for transmitting packet switched data in a mobile communications system |
6438142, | Mar 28 1997 | Alcatel | Method for TDMA transmission on a plurality of carrier frequencies, corresponding signal and receiver |
6473438, | Jun 02 1994 | Amati Communications Corporation | Method and apparatus for coordinating multi-point to-point communications in a multi-tone data transmission system |
6532227, | Apr 21 1997 | Nokia Technologies Oy | General packet radio service |
6693892, | Jul 31 1997 | Nokia Technologies Oy | Method of controlling communication resources |
6782264, | Jan 08 1999 | TRUEPOSITION, INC | Monitoring of call information in a wireless location system |
20020071480, | |||
GB2285900, | |||
WO9849796, | |||
WO9909724, | |||
WO9849476, | |||
WO9909724, |
Executed on | Assignor | Assignee | Conveyance | Frame | Reel | Doc |
Jan 31 2002 | VÄNTTINEN, VEIJO | Nokia Corporation | ASSIGNMENT OF ASSIGNORS INTEREST SEE DOCUMENT FOR DETAILS | 042288 | /0387 | |
Feb 06 2002 | RAJALA, JUSSI | Nokia Corporation | ASSIGNMENT OF ASSIGNORS INTEREST SEE DOCUMENT FOR DETAILS | 042288 | /0387 | |
Mar 22 2007 | Nokia Corporation | SPYDER NAVIGATIONS L L C | ASSIGNMENT OF ASSIGNORS INTEREST SEE DOCUMENT FOR DETAILS | 025811 | /0934 | |
Feb 15 2011 | Intellectual Ventures I LLC | (assignment on the face of the patent) | / | |||
Jul 18 2011 | SPYDER NAVIGATIONS L L C | Intellectual Ventures I LLC | MERGER SEE DOCUMENT FOR DETAILS | 026637 | /0611 |
Date | Maintenance Fee Events |
Jun 24 2014 | M1552: Payment of Maintenance Fee, 8th Year, Large Entity. |
Jun 12 2018 | M1553: Payment of Maintenance Fee, 12th Year, Large Entity. |
Date | Maintenance Schedule |
Sep 11 2015 | 4 years fee payment window open |
Mar 11 2016 | 6 months grace period start (w surcharge) |
Sep 11 2016 | patent expiry (for year 4) |
Sep 11 2018 | 2 years to revive unintentionally abandoned end. (for year 4) |
Sep 11 2019 | 8 years fee payment window open |
Mar 11 2020 | 6 months grace period start (w surcharge) |
Sep 11 2020 | patent expiry (for year 8) |
Sep 11 2022 | 2 years to revive unintentionally abandoned end. (for year 8) |
Sep 11 2023 | 12 years fee payment window open |
Mar 11 2024 | 6 months grace period start (w surcharge) |
Sep 11 2024 | patent expiry (for year 12) |
Sep 11 2026 | 2 years to revive unintentionally abandoned end. (for year 12) |