Method and apparatus for improved MBMS capacity and link management through robust and performance optimal soft combining
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
H04L-001/00
H04L-007/00
H04B-007/212
H04J-003/06
출원번호
US-0847002
(2010-07-30)
등록번호
US-8456996
(2013-06-04)
발명자
/ 주소
Bhattacharjee, Supratik
Nambiar, Rajiv
출원인 / 주소
QUALCOMM Incorporated
대리인 / 주소
Jacobs, Jeffrey D.
인용정보
피인용 횟수 :
3인용 특허 :
5
초록▼
A method for wireless communication is disclosed that includes receiving a plurality of sets of transport blocks, each set of transport blocks associated with a radio link from a plurality of radio links in soft combining; performing a filtering operation of block errors in the plurality of radio li
A method for wireless communication is disclosed that includes receiving a plurality of sets of transport blocks, each set of transport blocks associated with a radio link from a plurality of radio links in soft combining; performing a filtering operation of block errors in the plurality of radio links; and removing one or more radio links from the plurality of radio links in soft combining based on the filtering operation. An apparatus and processing system for performing the method are also disclosed.
대표청구항▼
1. A method of wireless communication, comprising: receiving a plurality of sets of transport blocks, each set of transport blocks associated with a radio link from a plurality of radio links in soft combining;performing a filtering operation to obtain a measure of block errors detected among the pl
1. A method of wireless communication, comprising: receiving a plurality of sets of transport blocks, each set of transport blocks associated with a radio link from a plurality of radio links in soft combining;performing a filtering operation to obtain a measure of block errors detected among the plurality of radio links in soft combining;detecting for a lack of synchronization among the plurality of radio links in soft combining based on the measure; anddisabling soft combining when lack of synchronization is detected. 2. The method of claim 1, further comprising enabling selection combining when lack of synchronization is detected. 3. The method of claim 1, further comprising re-enabling soft combining after a predetermined resume period. 4. The method of claim 1, wherein the measure comprises a long-term average of block errors and performing the filtering operation comprises comparing the measure with an error threshold. 5. The method of claim 1, wherein performing the filtering operation further comprises comparing a power measurement for the plurality of radio links with a power threshold. 6. The method of claim 5, wherein the power measurement comprises a ratio of a weighted average of traffic versus a common pilot. 7. The method of claim 1, wherein performing the filtering operation further comprises determining an S-CCPCH/P-CPICH ratio for use in soft-combining. 8. The method of claim 1, further comprising waiting a start-up delay before performing the filtering operation. 9. The method of claim 1, wherein the soft combining comprises determining a common transport format combination indicator (TFCI). 10. The method of claim 9, wherein determining the common TFCI comprises: looking up a transport format combination (TFC) for a plurality of transport channels using an available TFCI candidate for a frame;performing a reverse lookup for any lagging links to determine a TFCI corresponding to the TFC; andsetting radio modulation parameters for the any lagging links based on the determined TFCI. 11. The method of claim 9, wherein the common TFCI is based on a TFCI with a highest amount of correlation from the plurality of radio links. 12. An apparatus for wireless communication, comprising: means for receiving a plurality of sets of transport blocks, each set of transport blocks associated with a radio link from a plurality of radio links in soft combining;means for performing a filtering operation to obtain a measure of block errors detected among the plurality of radio links in soft combining;means for detecting for a lack of synchronization among the plurality of radio links in soft combining based on the measure; andmeans for disabling soft combining when lack of synchronization is detected. 13. The apparatus of claim 12, further comprising means for enabling selection combining when lack of synchronization is detected. 14. The apparatus of claim 12, further comprising means for re-enabling soft combining after a predetermined resume period. 15. The apparatus of claim 12, wherein the measure comprises a long-term average of block errors and the means for performing the filtering operation comprises means for comparing the measure with an error threshold. 16. The apparatus of claim 12, wherein the means for performing the filtering operation comprises means for comparing a power measurement for the plurality of radio links with a power threshold. 17. The apparatus of claim 16, wherein the power measurement comprises a ratio of a weighted average of traffic versus a common pilot. 18. The apparatus of claim 12, wherein the means for performing the filtering operation comprises means for determining an S-CCPCH/P-CPICH ratio for use in soft-combining. 19. The apparatus of claim 12, further comprising means for waiting a start-up delay before performing the filtering operation. 20. The apparatus of claim 12, wherein the soft combining comprises means for determining a common transport format combination indicator (TFCI). 21. The apparatus of claim 20, wherein the means for determining the common TFCI comprises: means for looking up a transport format combination (TFC) for a plurality of transport channels using an available TFCI candidate for a frame;means for performing a reverse lookup for any lagging links to determine a TFCI corresponding to the TFC; andmeans for setting radio modulation parameters for the any lagging links based on the determined TFCI. 22. The apparatus of claim 20, wherein the common TFCI is based on a TFCI with a highest amount of correlation from the plurality of radio links. 23. An apparatus for wireless communication, comprising: a memory comprising a plurality of instructions;a processor coupled to the memory and configured to execute the plurality of instructions to: receive a plurality of sets of transport blocks, each set of transport blocks associated with a radio link from a plurality of radio links in soft combining;perform a filtering operation to obtain a measure of block errors detected among the plurality of radio links in soft combining;detect for a lack of synchronization among the plurality of radio links in soft combining based on the measure; anddisable soft combining when lack of synchronization is detected. 24. The apparatus of claim 23, wherein the processor is further configured to execute the plurality of instructions to enable selection combining when lack of synchronization is detected. 25. The apparatus of claim 23, wherein the processor is further configured to execute the plurality of instructions to re-enable soft combining after a predetermined resume period. 26. The apparatus of claim 23, wherein the measure comprises a long-term average of block errors and the processor is further configured to compare the measure with an error threshold. 27. The apparatus of claim 23, wherein the processor is further configured to compare a power measurement for the plurality of radio links with a power threshold. 28. The apparatus of claim 27, wherein the power measurement comprises a ratio of a weighted average of traffic versus a common pilot. 29. The apparatus of claim 23, wherein the processor is further configured to determine an S-CCPCH/P-CPICH ratio for use in soft-combining. 30. The apparatus of claim 23, wherein the processor is further configured to wait a start-up delay before performing the filtering operation. 31. The apparatus of claim 23, wherein the processor is further configured to determine a common transport format combination indicator (TFCI). 32. The apparatus of claim 31, wherein the common TFCI is based on a TFCI with a highest amount of correlation from the plurality of radio links. 33. The apparatus of claim 23, wherein the processor is further configured to: look up a transport format combination (TFC) for a plurality of transport channels using an available TFCI candidate for a frame;perform a reverse lookup for any lagging links to determine a TFCI corresponding to the TFC; andset radio modulation parameters for the any lagging links based on the determined TFCI. 34. A computer program product for wireless communications, comprising: a computer-readable medium comprising code for: receiving a plurality of sets of transport blocks, each set of transport blocks associated with a radio link from a plurality of radio links in soft combining;performing a filtering operation to obtain a measure of block errors detected among the plurality of radio links in soft combining;detecting for a lack of synchronization among the plurality of radio links in soft combining based on the measure; anddisabling soft combining when lack of synchronization is detected. 35. An access terminal, comprising: a receiver; anda processing system coupled to the receiver to receive transport blocks and configured to: receive a plurality of sets of transport blocks, each set of transport blocks associated with a radio link from a plurality of radio links in soft combining;perform a filtering operation to obtain a measure of block errors detected among the plurality of radio links in soft combining;detect for a lack of synchronization among the plurality of radio links in soft combining based on the measure; anddisable soft combining when lack of synchronization is detected.
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