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1. (WO2013112320) METHOD AND APPARATUS TO SOLVE PHYSICAL LAYER ISSUES RELATED TO MULTIPLE TIMING ADVANCE GROUP SUPPORT

Pub. No.:    WO/2013/112320    International Application No.:    PCT/US2013/021578
Publication Date: Fri Aug 02 01:59:59 CEST 2013 International Filing Date: Wed Jan 16 00:59:59 CET 2013
IPC: H04L 5/00
H04W 56/00
Applicants: QUALCOMM INCORPORATED
Inventors: CHEN, Wanshi
DAMNJANOVIC, Jelena M.
GAAL, Peter
XU, Hao
LUO, Tao
Title: METHOD AND APPARATUS TO SOLVE PHYSICAL LAYER ISSUES RELATED TO MULTIPLE TIMING ADVANCE GROUP SUPPORT
Abstract:
A method, an apparatus, and a computer program product for wireless communication are provided. The apparatus may determine a number of uplink timing groups configured for a plurality of component carriers, and determine whether to transmit at least one of data or control information on one or more first component carriers of the plurality of component carriers concurrently with sounding reference signals (SRS) on one or more second component carriers of the plurality of component carriers based at least in part on the number of uplink timing groups. When only one uplink timing group is determined, the SRS is transmitted in a symbol on the one or more second component carriers if the data and control information is not transmitted in the symbol. When two uplink timing groups are determined SRS may be transmitted on the second component carriers concurrently with data or control information on the component carriers.