System and method for providing multimedia broadcast multicast service (MBMS) operation

Patent metadata

Field	Value
Publication number	US-10834779-B2
Application number	US-201716325313-A
Country	US
Kind code	B2
Filing date	Aug 14, 2017
Priority date	Aug 14, 2016
Publication date	Nov 10, 2020
Grant date	Nov 10, 2020

Abstract

The various embodiments of the present invention disclose a system and method for multimedia broadcast multicast service (MBMS) operation, the method comprises of receiving, by a User Equipment (UE), a common notification configuration message for a Multi-Cast Control Channel (MCCH) and System Information (SI) change from a network, identifying one or more occasions where MCCH or SI change notification is to be scheduled, configuring, by the UE, a DRX sleep and wake up occasions for the UE based on the scheduling of the MCCH and the SI change notification period, monitoring for MCCH change or SI change notification on Physical Downlink Control Channel PDCCH Format 1C scrambled with M-RNTI on wakeup occasion, determining the change notification based on DCI bits pertaining to SI and/or MCCH of one or more MBMS area, and decoding indicated SI and/or MCCH on PDSCH on CAS sub-frames and/or PMCH channel of respective areas.

First claim

The invention claimed is:

1. A method for providing multimedia broadcast multicast service (MBMS) operation, the method comprising
receiving, by a User Equipment (UE), a common notification configuration message for a Multi-Cast Control Channel (MCCH) and System Information (SI) change from a network;
identifying one or more scheduled MCCH change notifications or one or more scheduled SI change notifications using one or more parameters received in the common notification configuration message;
configuring, by the UE, DRX sleep occasions and wake up occasions for the UE based on the one or more scheduled MCCH change notifications or the or more scheduled SI change notifications;
monitoring for a MCCH change notification or a SI change notification on a Physical Downlink Control Channel (PDCCH) Format 1C scrambled with a M-RNTI on one of the wake up occasions;
determining the MCCH change notification or the SI change notification based on DCI bits pertaining to SI or a MCCH of one or more MBMS areas; and
decoding the MCCH change notification or the SI change notification on a PDSCH of CAS sub-frames or a PMCH channel.

2. The method of claim 1 , wherein the SI change notification and the MCCH change notification are indicated together through a PDCCH DCI Format 1C on a non-MBSFN sub-frame, and the decoding is performed based on the M-RNTI.

3. The method of claim 1 , wherein a new bit is defined for a SI change indication and 8 bits are defined for a MCCH change indication for 8 different MBSFN areas.

4. The method of claim 1 , wherein the MCCH change notification is provided through one or more reserved sub-frames carrying Physical Downlink Control Channel (PDCCH)/-Downlink Control Information (DCI) on a dedicated MBMS cell, where the one or more reserved sub-frames comprises at least one of a Master Information Block (MIB), Primary Synchronization Signals (PSS), Secondary Synchronization Signals (SSS) and System Information Blocks (SIB) on a dedicated MBMS carrier.

5. The method for claim 1 , further comprising:
initializing a siModificationPeriod, subject to changes in MBMS area configurations for a MBMS-dedicated cell, where the siModificationPeriod is derived as a smallest MCCH modification period of all MBMS areas in the MBMS-dedicated cell.

6. The method of claim 5 , wherein the siModificationPeriod is rf512, corresponding to 512 radio frame.

7. The method of claim 5 , wherein the siModificationPeriod is a sub-multiple or a multiple of a MCCH modification period.

8. The method of claim 1 , further comprising:
initializing a siModificationPeriod, subject to changes in MBMS area configurations for a MBMS-dedicated cell, wherein the siModificationPeriod is implicitly derived as a shortest MCCH modification period in the MBMS-dedicated cell.

9. The method of claim 1 , further comprising:
receiving, by the UE, the MCCH change notification or the SI change notifications periodically on the PDCCH of a CAS sub-frame, where occasions of the one or more scheduled MCCH change notifications are common for one or more MCCHs that are configured and configurable by one or more parameters included in a SystemInformationBlockType13.

10. The method of claim 9 , wherein the one or more parameters included in the SystemInformationBlockType13 comprise:
a repetition coefficient;
a radio frame offset; and
a SI modification period.

11. The method of claim 10 , wherein occasions for the common notification configuration message are based on a MCCH with a shortest modification period.

12. The method of claim 11 , wherein the shortest modification period corresponds to a lowest value of a MCCH ModificationPeriod of all of the one or more MCCHs that are configured.

13. The method of claim 10 , wherein the MCCH change notification or the SI change notification is scheduled in radio frames for which an SFN MOD notification repetition period is equal to a notificationOffset, where a notificationRepetitionCoefficient indicates a number of repetitions of MCCH change or SI change indication in the SI modification period.

14. The method of claim 13 , wherein the notificationRepetitionCoefficient and the notificationOffset define a selected CAS that is a System Frame Number (SFN) of a radio frame having a CAS sub-frame configured to carry a notification.

15. The method of claim 14 , wherein the notificationOffset is configured as 40 ms or multiples of 40 ms to align with occurrence of the CAS sub-frame.

16. The method of claim 1 , further comprising:
enabling, by the UE, continuity of a service during a change in a MBMS-dedicated cell, the MBMS-dedicated cell carrying an MBMS service, wherein the change in the MBMS-dedicated cell is due to at least one of mobility, service unavailability, service signal strength declining below a threshold level or mobility of the UE;
informing, by the UE, an MBMS reception status on the MBMS-dedicated cell on receiving an interest indication message on a PCell; and
setting up, by the UE, a new MBMS-dedicated cell which provides the MBMS service to the UE.

17. The method of claim 16 , wherein the UE receiving the MBMS service through the MBMS-dedicated cell performs measurements for MBMS signal strength and service quality.

18. The method of claim 17 , wherein a measurement report is transmitted via an uplink on the PCell and includes an identification of the MBMS-dedicated cell and at least one of a MBSFN area, a PMCH, or the MBMS service.

19. The method of claim 17 , wherein the network adjusts transmission parameters to meet a signal and a quality of a maximum of receiving UEs based on a measurement reports from the UE.

20. The method of claim 17 , wherein the UE is configured to utilize a unicast mode of MBMS service reception based on a signal or a quality of the MBMS service not being met with a dedicated MBMS carrier mode of MBMS service reception.

Assignees

• Samsung Electronics Co Ltd

Inventors

• Shrivastava Vinay Kumar
• Raj Rohan
• Madhurantakam Shrinath Ramamoorthy
• KHACHANE Swapnil Vinod
• Jin Seung-Ri
• Makhija Piyush

Classifications

• H04W72/30

  Resource management for broadcast services · CPC title

• H04W4/06 Primary

  Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services · CPC title

• H04W76/20

  Manipulation of established connections · CPC title

• H04W4/30

  Services specially adapted for particular environments, situations or purposes · CPC title

• H04W76/40 Primary

  for selective distribution or broadcast · CPC title