3GPP CR Summaries for 36.321(L2 MAC)

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Processing of contention resolution message 

R2-090976

February 2009 RAN2 #65

A section is added to the annex, which is listing the different MAC header structures a UE is required to consider when processing a MAC PDU containing a UE Contention Resolution Identity MAC control element. This CR helps UE to meet the time constraints for the processing of a MAC PDU on DL-SCH in case the MAC PDU contains a UE Contention Resolution Identity MAC control element.

http://www.3gpp.org/ftp/tsg_ran/WG2_RL2/TSGR2_65/Docs/R2-091976.zip

 

RNTI for CCCH 

R2-096426

Nov 2009 TSG-RAN2 Meeting #68

In current spec.,  CCCH can only be addressed to Temporary C-RNTI, which means that RRCConnectionSetup andRRCConnectionReestablishment must be included in msg4. This contradicts with the content of Annex B which indicates that msg4 can either include CCCH or not include it. Since Annex B is informative, a UE implementation may expect CCCH always in msg4 and not be able to cope with a msg4 not including it.

http://www.3gpp.org/ftp/tsg_ran/WG2_RL2/TSGR2_68/Docs/R2-096426.zip

 

SPS implicit release on UL

R2-087082 

November 2008 TSG-RAN2 Meeting #63bis

When the UE transmits “n” consecutive UL transmissions in the UL SPS resources with no data other than an empty BSR (no buffered data), the eNB and UE release the configure SPS resource impplicitly.

VoIP support in LTE

R2-062774

October 2006  TSG- RAN2  Meeting #55

VoIP should be supported as efficiently as possible in LTE where the conventional CS voice service will no longer be available.In a scheduled mobile communication system like LTE, the scheduling overhead could be untolerable for services like the VoIP service, where small packets are generated periodically.This contribution discusses how to minimize the overhead of schedduling commands and scheduling requests. 

http://www.3gpp.org/ftp/tsg_ran/WG2_RL2/TSGR2_55/Documents/R2-062774.zip