The present invention discloses a method for obtaining a service list and multimedia broadcast multicast service data, and the method includes: obtaining electronic service guide (esg) information, receiving a system information block (SIB)13 from system information, and obtaining a cell service list according to the esg information and the SIB 13. The present invention also discloses a system for obtaining a service list and multimedia broadcast multicast service data; in the system, a cell service list acquisition unit is configured to obtain esg information, receive an SIB 13 from system information, and obtain a cell service list according to the esg information and the SIB 13. With the method and system in the present invention, the cell service list can be acquired, and the receiving of data of multimedia broadcast multicast service (mbms) service can be achieved after obtaining the cell service list.

Patent
   RE46742
Priority
Jan 26 2010
Filed
Dec 09 2014
Issued
Feb 27 2018
Expiry
Jan 24 2031
Assg.orig
Entity
Large
0
19
EXPIRED
1. A method for acquiring a service list and multimedia broadcast multicast service data, comprising:
acquiring electronic service guide (esg) information, wherein, the esg information comprises at least one of the following information: all multimedia broadcast multicast service (mbms) services carried in a network side, and information about the multimedia broadcast multicast single frequency network (MBSFN) Area corresponding to each mbms service;
reading a system information block (SIB)13 from a system broadcast message;
acquiring a cell service list according to a matching between the esg information and the SIB13; and
acquiring corresponding multimedia broadcast multicast service data based on the specific information about the MBSFN Area corresponding to a user selected an mbms service formselected by a user from the cell service list.
8. A system method for acquiring a a user equipment ue to acquire a cell service list and multimedia broadcast multicast service data, comprising: a cell service list acquisition unit, configured to
acquire acquiring by using a cell service list acquisition unit in the ue, electronic service guide (esg) information; wherein, the esg information comprises at least one of the following information: all multimedia broadcast multicast service (mbms) services carried in a network side, and information about the multimedia broadcast multicast single frequency network (MBSFN) Area corresponding to each mbms service;
read reading, by using the cell service list acquisition unit in the ue, a system information block (SIB)13 from a system broadcast message;
acquire a acquiring, by using the cell service list acquisition unit in the ue, the cell service list according to a matching between the esg information and the SIB13; and
acquire acquiring, by using the cell service list acquisition unit in the ue, corresponding multimedia broadcast multicast service data based on the specific information about the MBSFN Area corresponding to a user selected an mbms service selected by a user from the cell service list.
2. The method according to claim 1, wherein, when a user equipment (ue) acquires the esg information, an acquisition opportunity of the esg information comprises: when the ue just starts up, or when the ue is registering to a network side, or before the ue enters a current multimedia broadcast multicast service single frequency network (MBSFN) area, or before the ue enters another MBSFN area besides the a current MBSFN area.
3. The method according to claim 1, wherein, there is a one-to-one correspondence relation between each mbms services and the MBSFN Areas.
4. The method according to claim 1, wherein, the information about the an MBSFN Area corresponding to each mbms service at least comprises: MBSFN Area identity (ID), and the MBSFN Area ID is one-to-one correspondence to an mbms service ID; wherein, each MBSFN Area is identified by the corresponding MBSFN Area ID, and each mbms service is identified by the corresponding mbms service ID; and
acquiring the cell service list according to the esg information and the SIB 13 comprises: the ue a user equipment (ue) learning the information about one or more MBSFN Areas of a cell to which the ue belongs by the SIB13, acquiring one or more MBSFN Area IDs from the information about the one or more MBSFN Areas of the cell to which the ue belongs, selecting a part of or all of the mbms services from the mbms services acquired by the esg information, composing the cell service list using the selected mbms services, so as to achieve the acquisition of the cell service list; wherein, the selecting comprises: being achieved by matching according to the one-to-one correspondence relation between the mbms service ID IDs and the MBSFN Area ID IDs in the esg information and the MBSFN Area ID acquired from the SIB13.
5. The method according to claim 4, after acquiring the cell service list, further comprising: the ue selecting an searching in the cell service list for the mbms service in which the ue user is interested from the cell service list in and selects; the ue acquiring control info nation information related to the mbms service in which the ue user is interested in and selects; and the ue receiving, according to the control information, data of the mbms service in which the ue user is interested according to the control information in and selects.
6. The method according to claim 5, wherein, selecting before searching in the cell service list for the mbms service in which the ue user is interested in and selects the method further comprises:
the ue directly selecting the mbms service in which the ue is interested from the cell service list;
or, after reading the information about one or more corresponding multicast control channels (MCCH) through the information about one or more MBSFN Areas acquired from the SIB13, the ue selecting the mbms service in which the ue is interested from the cell service list;
wherein, for the information about one or more MCCHs and one or more MBSFN Areas, there is a one-to-one correspondence relation between the information about each MCCH and the MBSFN Area ID corresponding to each MBSFN Area.
7. The method according to claim 6, wherein, acquiring the control information related to the mbms service in which the ue user is interested in and selects comprises: the ue acquiring, according to the one-to-one correspondence relation between the information about the MCCH and mbms service ID, the information about the an MCCH corresponding to the mbms service in which the ue user is interested according to the one-to-one correspondence relation between the information about the MCCH and the mbms service ID in and selects;
wherein, learning the one-to-one correspondence relation between the information about the MCCH and the mbms service ID comprises: the ue learning the one-to-one correspondence relation between the information about the MCCH and the mbms service ID according to the one-to-one correspondence relation between the information about each MCCH and the MBSFN Area ID and the one-to-one correspondence relation between each MBSFN Area ID and the mbms service ID.
9. The system method according to claim 8, wherein, the cell service list acquisition unit is further configured for the ue uses the cell service list acquisition unit to learn information about one or more multimedia broadcast multicast service single frequency network (MBSFN) Areas of a cell to which the ue belongs by the SIB13, acquire one or more MBSFN Area IDs from the information about the one or more MBSFN Areas of the cell to which the ue belongs, select a part of or all of mbms services from the mbms services acquired by the esg information, compose the cell service list using the selected mbms services, so as to achieve the acquisition of the cell service list; wherein, the selecting comprises: being achieved by matching according to a one-to-one correspondence relation between an mbms service ID and an MBSFN Area ID in the esg information and an MBSFN Area ID acquired from the SIB13.
10. The system method according to claim 9, further comprising: an mbms service selection unit, a control information acquisition unit and an mbms service data acquisition unit; wherein,
the mbms service selection unit is configured for the ue uses an mbms service selection unit to select an search in the cell service list for the mbms service in which the ue user is interested from the cell service list in and selects;
the control information acquisition unit is configured for the ue uses a control information acquisition unit to acquire control information related to the mbms service in which the ue user is interested in and selects; and
the mbms service data acquisition unit is configured for the ue uses an mbms service data acquisition unit to receive, according to the control information, data of the mbms service in which the ue user is interested according to the control information in and selects.
11. The system method according to claim 10, wherein, the mbms service selection unit is further configured for the ue to directly select the mbms service in which the ue is interested from the cell service list, or for the ue uses the mbms service selection unit to select search in the cell service list for the mbms service in which the ue user is interested from the cell service list in and selects after reading information about one or more corresponding multicast control channels (MCCHs) by the information about one or more MBSFN Areas acquired from the SIB13; and
wherein, for the information about one or more MCCHs and one or more MBSFN Areas, there is a one-to-one correspondence relation between the information about each MCCH and the MBSFN Area ID corresponding to each MBSFN Area.
12. The system method according to claim 11, wherein, the control information acquisition unit is further configured for the ue uses the control information acquisition unit to acquire, according to the one-to-one correspondence relation between the information about the MCCH and the mbms service ID, the information about the an MCCH corresponding to the mbms service in which the ue user is interested according to the one-to-one correspondence relation between the information about the MCCH and the mbms service ID in and selects; wherein, learning the one-to-one correspondence relation between the information about the MCCH and the mbms service ID comprises: the ue learning the one-to-one correspondence relation between the information about the MCCH and the mbms service ID according to the one-to-one correspondence relation between the information about each MCCH and the MBSFN Area ID and the one-to-one correspondence relation between each MBSFN Area ID and the mbms service ID.
13. The method according to claim 2, wherein, the information about the an MBSFN Area corresponding to each mbms service at least comprises: MBSFN Area identity (ID), and the MBSFN Area ID is one-to-one correspondence to an mbms service ID; wherein, each MBSFN Area is identified by the corresponding MBSFN Area ID, and each mbms service is identified by the corresponding mbms service ID; and
acquiring the cell service list according to the esg information and the SIB13 comprises: the ue learning the information about one or more MBSFN Areas of a cell to which the ue belongs by the SIB13, acquiring one or more MBSFN Area IDs from the information, about the one or more MBSFN Areas of the cell to which the ue belongs, selecting a part of or all of the mbms services from the mbms services acquired by the esg information, composing the cell service list using the selected mbms services, so as to achieve the acquisition of the cell service list; wherein, the selecting comprises: being achieved by matching according to the one-to-one correspondence relation between the mbms service IDs and the MBSFN Area IDs in the esg information and the MBSFN Area ID acquired from the SIB13.
14. The method according to claim 13, after acquiring the cell service list, further comprising: the ue selecting an searching in the cell service list for the mbms service in which the ue user is interested from the cell service list in and selects; the ue acquiring control information related to the mbms service in which the ue user is interested in and selects; and
the ue receiving, according to the control information, data of the mbms service in which the ue user is interested according to the control information in and selects.
15. The method according to claim 14, wherein, selecting before searching in the cell service list for the mbms service in which the ue user is interested in and selects the method further comprises:
the ue directly selecting the mbms service in which the ue is interested from the cell service list;
or, after reading the information about one or more corresponding multicast control channels (MCCH) through the information about one or more MBSFN Areas acquired from the SIB13, the ue selecting the mbms service in which the ue is interested from the cell service list; wherein, for the information about one or more MCCHs and one or more MBSFN Areas, there is a one-to-one correspondence relation between the information about each MCCH and the MBSFN Area ID corresponding to each MBSFN Area.
16. The method according to claim 15, wherein, acquiring the control information related to the mbms service in which the ue user is interested in and selects comprises: the ue acquiring, according to the one-to-one correspondence relation between the information about the MCCH and the mbms service ID, the information about the an MCCH corresponding to the mbms service in which the ue user is interested according to the one-to-one correspondence relation between the information about the MCCH and the mbms service ID in and selects;
wherein, learning the one-to-one correspondence relation between the information about the MCCH and the mbms service ID comprises: the ue learning the one-to-one correspondence relation between the information about the MCCH and the mbms service ID according to the one-to-one correspondence relation between the information about each MCCH and the MBSFN Area ID and the one-to-one correspondence relation between each MBSFN Area ID and the mbms service ID.
17. The method according to claim 1 3, wherein, the information about the an MBSFN Area corresponding to each mbms service at least comprises: MBSFN Area identity (ID), and the MBSFN Area ID is one-to-one correspondence to an mbms service ID; wherein, each MBSFN Area is identified by the corresponding MBSFN Area ID, and each mbms service is identified by the corresponding mbms service ID; and
acquiring the cell service list according to the esg information and the SIB 13 comprises: the ue a user equipment (ue) learning the information about one or more MBSFN Areas of a cell to which the ue belongs by the SIB13, acquiring one or more MBSFN Area IDs from the information about the one or more MBSFN Areas of the cell to which the ue belongs, selecting a part of or all of the mbms services from the mbms services acquired by the esg information, composing the cell service list using the selected mbms services, so as to achieve the acquisition of the cell service list; wherein, the selecting comprises: being achieved by matching according to the one-to-one correspondence relation between the mbms service ID IDs and the MBSFN Area ID IDs in the esg information and the MBSFN Area ID acquired from the SIB13.
18. The method according to claim 17, after acquiring the cell service list, further comprising: the ue selecting an searching in the cell service list for the mbms service in which the ue user is interested from the cell service list in and selects; the ue acquiring control information related to the mbms service in which the ue user is interested in and selects; and the ue receiving, according to the control information, data of the mbms service in which the ue user is interested according to the control information in and selects.
19. The method according to claim 3 18, wherein, the information about the MBSFN Area at least comprises before searching in the cell service list for the mbms service which the user is interested in and selects, the method further comprises: MBSFN Area identity (ID), and the MBSFN Area ID is one-to-one correspondence to an mbms service ID; wherein, each MBSFN Area is identified by the corresponding MBSFN Area ID, and each mbms service is identified by the corresponding mbms service ID; and
acquiring the cell service list according to the esg information and the SIB13 comprises: the ue learning the information about one or more MBSFN Areas of a cell to which the ue belongs by the SIB13, acquiring one or more MBSFN Area IDs from the information, selecting a part of or all of the mbms services from the mbms services acquired by the esg information, composing the cell service list using the selected mbms services, so as to achieve the acquisition of the cell service list; wherein, the selecting comprises: being achieved by matching according to the one-to-one correspondence relation between the mbms service ID and the MBSFN Area ID in the esg information and the MBSFN Area ID acquired from the SIB13
reading information about one or more corresponding multicast control channels (MCCH) through the information about one or more MBSFN Areas acquired from the SIB13; wherein, for the information about one or more MCCHs and one or more MBSFN Areas, there is a one-to-one correspondence relation between the information about each MCCH and the MBSFN Area ID corresponding to each MBSFN Area.
0. 20. The method according to claim 19, wherein, acquiring the control information related to the mbms service which the user is interested in and selects comprises: the ue acquiring according to the one-to-one correspondence relation between the information about the MCCH and the mbms service ID, the information about an MCCH corresponding to the mbms service which the user is interested in and selects
wherein, learning the one-to-one correspondence relation between the information about the MCCH and the mbms service ID comprises: the ue learning the one-to-one correspondence relation between the information about the MCCH and the mbms service ID according to the one-to-one correspondence relation between the information about each MCCH and the MBSFN Area ID and the one-to-one correspondence relation between each MBSFN Area ID and the mbms service ID.

DSI dynamic scheduling information (DSI) and receives the data of the interested MBMS service; and then the current flow ends.

In step 115, there is no MBMS service in which the UE is interested.

In step 116, the UE exits the MBMS application; and then the current flow ends.

The UE obtains the ESG information in the manner of point to point, such as a manner of short message, before entering the MBSFN Area, and the ESG information includes all the MBMS services which may be bore in the network; and 15 MBMS services are taken for example in the present example. The ESG information further includes information about the MBSFN Area corresponding to each MBMS service, such as MBSFN Area ID, wherein the MBSFN Area ID is a multi-bit binary number. As shown in FIG. 7, MBSFN Area ID #a corresponds to MBMS service 1, MBSFN Area ID #b corresponds to MBMS service 2, and MBSFN Area ID #c corresponds to MBMS service 3.

The UE receives the system information block SIB13, the UE will acquire by the SIB13 that the cell is covered by two MBSFN Areas, which are the MBSFN Area corresponding to the MBSFN Area ID #a and the MBSFN Area corresponding to the MBSFN Area ID #b.

The cell service list information about that cell can be obtained by a coverage situation of the MBSFN Areas of that cell obtained according to the ESG information and SIB13, and the cell service list information is illustrated as shown in FIG. 7.

The UE selects an interested MBMS service from the cell service list.

The UE receives the information about the MCCH related to the interested MBMS service according to the interested MBMS service selected by the UE.

The UE judges whether its interested MBMS service has completed the MBMS Session Start procedure according to the obtained information about the MCCH; if that MBMS service has completed the MBMS Session Start procedure, it indicates that that MBMS service has been and is being sent by the network, and the MBMS service is in the ongoing state, then the UE will receive the service data of the MBMS service according to the control parameters of its interested MBMS service obtained from the MCCH; and if the control parameters of the MBMS service in which the UE is interested is not included, then the MBMS service does not trigger the MBMS Session Start procedure, it indicates that the MBMS service is not sent through the network currently, then the UE can acquire whether the corresponding MCCH has changed by monitoring the MCCH notification, and if it has changed, then the corresponding information about the MCCH will be re-updated, until its interested MBMS service has completed the MBMS Session Start procedure.

The UE obtains the ESG information in the manner of point to point, such as a manner of WAP, before entering the MBSFN Area, and the ESG information includes all the MBMS services which may be bore in the network; and 15 MBMS services are taken for example in the present embodiment. The ESG information further includes information about the MBSFN Area corresponding to each MBMS service, such as MBSFN Area ID, wherein the MBSFN Area ID is a multi-bit binary number. As shown in FIG. 8, MBSFN Area ID #a corresponds to MBMS service 1, MBSFN Area ID #b corresponds to MBMS service 2, and MBSFN Area ID #c corresponds to MBMS service 3.

The UE receives the system information block SIB13; the UE will acquire by the SIB13 that the cell is covered by two MBSFN Areas, which are the MBSFN Area corresponding to the MBSFN Area ID #a and the MBSFN Area corresponding to the MBSFN Area ID #b.

The cell service list information about that cell can be acquired by a coverage situation of the MBSFN Areas of that cell obtained according to the ESG information and SIB13, and the cell service list information is illustrated as shown in FIG. 8.

It needs to be pointed out here that: the UE receives the information about all the MCCHs of the corresponding cell according to the information about all the MBSFN Areas in that cell obtained from the SIB13, and selects its interested MBMS service from the acquired cell service list. Herein, it is different from example 1.

The UE receives the MCCH information related to the interested MBMS service according to the interested MBMS service selected by the UE.

The UE judges whether its interested MBMS service has completed the MBMS Session Start procedure according to the obtained information about the MCCH; if that MBMS service has completed the MBMS Session Start procedure, it indicates that that MBMS service has been and is being sent by the network, and the MBMS service is in the ongoing state, then the UE will receive the service data of the MBMS service according to the control parameters of its interested MBMS service obtained from the MCCH; and if the control parameters of the MBMS service in which the UE is interested is not included, then the MBMS service does not trigger the MBMS Session Start procedure, it indicates that the MBMS service is not sent through the network currently, then the UE can acquire whether the corresponding MCCH has changed by monitoring the MCCH notification, and if it has changed, then the corresponding information about the MCCH will be re-updated, until its interested MBMS service has completed the MBMS Session Start procedure.

The UE obtains the ESG information in the manner of point to point, such as a manner of WAP, before entering the MBSFN Area, and the ESG information includes all the MBMS services which may be bore in the network; and 15 MBMS services are taken for example in the present embodiment. The ESG information further includes information about the MBSFN Area corresponding to each MBMS service, such as MBSFN Area ID, wherein the MBSFN Area ID is a multi-bit binary number. As shown in FIG. 9, MBSFN Area ID #a corresponds to MBMS service 1, MBSFN Area ID #b corresponds to MBMS service 2, and MBSFN Area ID #c corresponds to MBMS service 3.

The UE receives the system information block SIB13; the UE will acquire by the SIB13 that the cell is covered by two MBSFN Areas, which are the MBSFN Area corresponding to the MBSFN Area ID #a and the MBSFN Area corresponding to the MBSFN Area ID #b.

The cell service list information about that cell can be acquired by a coverage situation of the MBSFN Areas of that cell obtained according to the ESG information and SIB13, and the cell service list information is illustrated as shown in FIG. 9.

The UE receives the information about all the MCCHs of the corresponding cell according to the information about all the MBSFN Areas in that cell obtained from the SIB13, and selects its interested MBMS service from the acquired cell service list.

It needs to be pointed out here: the UE receives the information about all the MCCHs in the cell indicated by the SIB13 according to the interested MBMS service selected by the UE, that is, it is not only to receive the information about the MCCH related to the MBMS service in which the UE is interested. Herein, it is different from example 2.

The UE judges whether its interested MBMS service has completed the MBMS Session Start procedure according to the obtained information about the MCCH; if that MBMS service has completed the MBMS Session Start procedure, it indicates that that MBMS service has been and is being sent by the network, and the MBMS service is in the ongoing state, then the UE will receive the service data of the MBMS service according to the control parameters of its interested MBMS service obtained from the MCCH; and if the control parameters of the MBMS service in which the UE is interested is not included, then the MBMS service does not trigger the MBMS Session Start procedure, it indicates that the MBMS service is not sent through the network currently, then the UE can acquire whether the corresponding MCCH has changed by monitoring the MCCH notification, and if it has changed, then the corresponding information about the MCCH will be re-updated, until its interested MBMS service has completed the MBMS Session Start procedure.

A system for obtaining a service list and data of MBMS service comprises: a cell service list acquisition unit, configured to obtain ESG information, receive an SIB13 from system information, and obtain a cell service list according to the ESG information and the SIB13.

Herein, the cell service list acquisition unit is further configured for the UE to acquire information about one or more MBSFN Areas of a cell to which the UE belongs by the SIB13, obtain one or more MBSFN Area IDs from the information about one or more MBSFN Areas, select a part of or all of MBMS services from the MBMS services obtained by the ESG information, compose the cell service list using the selected MBMS services, so as to achieve the acquisition of the cell service list. Wherein, the selecting specifically comprises: being achieved by matching according to a one-to-one correspondence relation between an MBMS service ID and an MBSFN Area ID in the ESG information and an MBSFN Area ID obtained from the SIB13.

Herein, the system further comprises: an MBMS service selection unit, a control information acquisition unit and an MBMS service data acquisition unit. The MBMS service selection unit is configured for the UE to select an MBMS service in which the UE is interested from the cell service list. The control information acquisition unit is configured for the UE to obtain control information related to the MBMS service in which the UE is interested. The MBMS service data acquisition unit is configured for the UE to receive data of the MBMS service in which the UE is interested according to the control information.

Here, the MBMS service selection unit is further configured for the UE to directly select the MBMS service in which the UE is interested from the cell service list; or for the UE to select the MBMS service in which the UE is interested from the cell service list after receiving information about one or more corresponding MCCHs by the information about one or more MBSFN Areas obtained from the SIB13. Wherein, for the information about one or more MCCHs and one or more MBSFN Areas, there is a one-to-one correspondence relation between the information about each MCCH and the MBSFN Area ID corresponding to each MBSFN Area.

Herein, the control information acquisition unit is further configured for the UE to obtain the information about the MCCH corresponding to the MBMS service in which the UE is interested according to the one-to-one correspondence relation between the information about the MCCH and the MBMS service ID; wherein, acquiring the one-to-one correspondence relation between the information about the MCCH and the MBMS service ID specifically comprises: the UE acquiring the one-to-one correspondence relation between the information about the MCCH and the MBMS service ID according to the one-to-one correspondence relation between the information about each MCCH and the MBSFN Area ID and the one-to-one correspondence relation between each MBSFN Area ID and the MBMS service ID.

Here, the Chinese and English annotations of the above mentioned text and text in the drawings are described as follows:

overlapping coverage can be represented as overlapping, modification period can be represented as Modification Period, MP for short, the repeat period can be represented as Repeat Period, RP for short, the system information block can be represented as System Information Block, SIB for short, uniform can be represented as common, and payload can be represented as payload.

What is described above is merely preferred embodiments of the present invention, and is not intended to limit the protection scope of the present invention.

Wang, Bin, Xu, Hui, Ma, Zijiang, Gou, Wei

Patent Priority Assignee Title
Patent Priority Assignee Title
6839565, Feb 19 2002 Nokia Technologies Oy Method and system for a multicast service announcement in a cell
8064885, Jan 25 2005 Samsung Electronics Co., TLD; SAMSUNG ELECTRONICS CO , LTD Method and apparatus for sending notification about broadcast service in a mobile broadcast system
8640173, Sep 07 2005 SAMSUNG ELECTRONICS CO , LTD Signalling of cell ID in digital mobile broadcast service guide for localized broadcasting
9331802, Nov 01 2005 RPX Corporation Identifying scope ESG fragments and enabling hierarchy in the scope
20040147266,
20040192267,
20060148467,
20060177028,
20060193337,
20060253560,
20070041377,
20090047942,
20090061914,
20090204997,
20120009947,
CN101106797,
CN101312556,
CN1735231,
WO2005101681,
/////
Executed onAssignorAssigneeConveyanceFrameReelDoc
Jun 27 2012WANG, BINZTE CorporationASSIGNMENT OF ASSIGNORS INTEREST SEE DOCUMENT FOR DETAILS 0445160838 pdf
Jun 27 2012MA, ZIJIANGZTE CorporationASSIGNMENT OF ASSIGNORS INTEREST SEE DOCUMENT FOR DETAILS 0445160838 pdf
Jun 27 2012XU, HUIZTE CorporationASSIGNMENT OF ASSIGNORS INTEREST SEE DOCUMENT FOR DETAILS 0445160838 pdf
Jun 27 2012GOU, WEIZTE CorporationASSIGNMENT OF ASSIGNORS INTEREST SEE DOCUMENT FOR DETAILS 0445160838 pdf
Dec 09 2014ZTE Corporation(assignment on the face of the patent)
Date Maintenance Fee Events
Jan 14 2015PTGR: Petition Related to Maintenance Fees Granted.
Oct 17 2022EXP: Patent Expired for Failure to Pay Maintenance Fees.


Date Maintenance Schedule
Feb 27 20214 years fee payment window open
Aug 27 20216 months grace period start (w surcharge)
Feb 27 2022patent expiry (for year 4)
Feb 27 20242 years to revive unintentionally abandoned end. (for year 4)
Feb 27 20258 years fee payment window open
Aug 27 20256 months grace period start (w surcharge)
Feb 27 2026patent expiry (for year 8)
Feb 27 20282 years to revive unintentionally abandoned end. (for year 8)
Feb 27 202912 years fee payment window open
Aug 27 20296 months grace period start (w surcharge)
Feb 27 2030patent expiry (for year 12)
Feb 27 20322 years to revive unintentionally abandoned end. (for year 12)