Method and apparatus for transmitting a pilot report (PilotReport) message in wireless communication systems
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
H04W-036/24
H04W-036/34
출원번호
US-0091453
(2006-10-27)
등록번호
US-8744444
(2014-06-03)
국제출원번호
PCT/US2006/042599
(2006-10-27)
§371/§102 date
20081002
(20081002)
국제공개번호
WO2007/051073
(2007-05-03)
발명자
/ 주소
Prakash, Rajat
Ulupinar, Fatih
출원인 / 주소
QUALCOMM Incorporated
대리인 / 주소
Braden, Stanton
인용정보
피인용 횟수 :
0인용 특허 :
166
초록▼
A method and apparatus for transmitting a PilotReport message is provided, comprising generating the PilotReport message and determining if an Active Set Size value is greater than one. In an embodiment, the access terminal will send a PilotReport message if one of the following conditions occurs: I
A method and apparatus for transmitting a PilotReport message is provided, comprising generating the PilotReport message and determining if an Active Set Size value is greater than one. In an embodiment, the access terminal will send a PilotReport message if one of the following conditions occurs: If the Active Set Size is greater than one, and EnhancedPilotReportEnabled=1, and The strength of a pilot in the active set has changed by more than an EnhancedPilotReportThreshold since the last PilotReport was sent. If the Active Set Size is one, and EnhancedPilot ReportEnabled=1, and The strongest current non-active pilot (for example, pilot j) has strength more than the EnhancedPilotReportRatio fraction of the total interference, and The strength of pilot j is more than EnhancedPilotReportThreshold away than the strength of the second strongest pilot at the time the last pilot report was sent.
대표청구항▼
1. A method for managing transmittal of a pilot report message from an access terminal in a wireless communication system, the method comprising: generating a pilot report message in a processor of the access terminal, wherein the pilot report message is used to request addition or deletion of pilot
1. A method for managing transmittal of a pilot report message from an access terminal in a wireless communication system, the method comprising: generating a pilot report message in a processor of the access terminal, wherein the pilot report message is used to request addition or deletion of pilots from an active set maintained by an access network; wherein the active set identifies sectors of an access network that are serving the access terminal;determining whether a size of the active set is greater than one;transmitting the pilot report message if a defined first condition exists and the size of the active set is greater than one, wherein existence of the first condition is determined by making a first explicit determination that the first condition exists as defined; andtransmitting the pilot report message if a defined second condition exists and the size of the active set is one, wherein existence of the second condition is determined by making a second explicit determination that the second condition exists as defined;wherein the second condition differs from the first condition, wherein existence of one of said first and second conditions is defined to require existence of a predetermined relationship between a same signal measurement captured from each of first and second pilot transmissions, and wherein the first pilot transmission occurred before transmission of a most recent said pilot report message and the second pilot transmission occurred after transmission of said most recent pilot report message. 2. The method of claim 1, wherein the first and second pilot transmissions carry respective instances of a same pilot signal, wherein said same signal measurement is signal strength, and wherein the predetermined relationship is that the signal strengths differ by more than a defined amount. 3. The method of claim 2, further comprising determining the defined amount based on a value in a message from the access network. 4. The method of claim 1, wherein one of the first and second conditions is defined to require that signal strength of a strongest non-active pilot exceeds a defined fraction of total interference. 5. The method of claim 4, wherein said same signal measurement is signal strength, wherein the predetermined relationship is that the signal strengths differ by more than a defined threshold amount, wherein the second pilot transmission is a strongest of an associated plurality of pilot transmissions, and wherein the first pilot transmission is a second strongest of another associated plurality of pilot transmissions. 6. The method of claim 1, wherein the first and second conditions are each defined to require that the pilot report message is enabled based on a value of at least one data bit in a message from the access network. 7. The method of claim 2, wherein the other of the first and second conditions is defined to require that a signal strength of a strongest non-active pilot exceeds a defined fraction of total interference. 8. The method of claim 7, wherein the other of said first and second conditions is defined to require that a signal strength of a strongest pilot among an associated plurality of pilots differs by more than a defined threshold amount from a signal strength of a second-strongest pilot among another associated plurality of pilots. 9. The method of claim 1, wherein existence of each of said first and second conditions is defined to require existence of a predetermined relationship between a same signal measurement captured from each of a said first pilot transmission and a said second pilot transmission. 10. An access terminal for wireless communications, comprising a processor coupled to a memory and to a transceiver, the memory holding instructions for: generating a pilot report message in the processor, wherein the pilot report message is used to request addition or deletion of pilots from an active set maintained by an access network; wherein the active set identifies sectors of an access network that are serving the access terminal;determining whether a size of the active set is greater than one;transmitting the pilot report message if a defined first condition exists and the size of the active set is greater than one, wherein existence of the first condition is determined by making a first explicit determination that the first condition exists as defined; andtransmitting the pilot report message if a defined second condition exists and the size of the active set is one, wherein existence of the second condition is determined by making a second explicit determination that the second condition exists as defined;wherein the second condition differs from the first condition, wherein existence of one of said first and second conditions is defined to require existence of a predetermined relationship between a same signal measurement captured from each of first and second pilot transmissions, and wherein the first pilot transmission occurred before transmission of a most recent said pilot report message and the second pilot transmission occurred after transmission of said most recent pilot report message. 11. The access terminal of claim 10, wherein the first and second pilot transmissions carry respective instances of a same pilot signal, wherein said same signal measurement is signal strength, and wherein the predetermined relationship is that the signal strengths differ by more than a defined amount. 12. The access terminal of claim 11, wherein the memory holds further instructions for determining the defined amount based on a value in a message from the access network. 13. The access terminal of claim 10, wherein one of the first and second conditions is defined to require that a signal strength of a strongest non-active pilot exceeds a defined fraction of total interference. 14. The access terminal of claim 13, wherein said same signal measurement is signal strength, wherein the predetermined relationship is that the signal strengths differ by more than a defined threshold amount, wherein the second pilot transmission is a strongest of an associated plurality of pilot transmissions, and wherein the first pilot transmission is a second strongest of another associated plurality of pilot transmissions. 15. The access terminal of claim 10, wherein the first and second conditions are each defined to require that the pilot report message is enabled based on a value of at least one data bit in a message from the access network. 16. The access terminal of claim 11, wherein the other of the first and second conditions is defined to require that a signal strength of a strongest non-active pilot exceeds a defined fraction of total interference. 17. The access terminal of claim 16, wherein the other of said first and second conditions is defined to require that a signal strength of a strongest pilot among an associated plurality of pilots differs by more than a defined threshold amount from a signal strength of a second-strongest pilot among another associated plurality of pilots. 18. The access terminal of claim 10, wherein existence of each of said first and second conditions is defined to require existence of a predetermined relationship between a same signal measurement captured from each of a said first pilot transmission and a said second pilot transmission. 19. A non-transitory computer-readable medium holding encoded instructions for managing transmittal of a pilot report message from an access terminal in a wireless communication system, said instructions when executed by a processor, cause a computer to perform: generating a pilot report message in a processor of the access terminal, wherein the pilot report message is used to request addition or deletion of pilots from an active set maintained by an access network; wherein the active set identifies sectors of an access network that are serving the access terminal;determining whether a size of the active set is greater than one;transmitting the pilot report message if a defined first condition exists and the size of the active set is greater than one, wherein existence of the first condition is determined by making a first explicit determination that the first condition exists as defined; andtransmitting the pilot report message if a defined second condition exists and the size of the active set is one, wherein existence of the second condition is determined by making a second explicit determination that the second condition exists as defined;wherein the second condition differs from the first condition, wherein existence of one of said first and second conditions is defined to require existence of a predetermined relationship to a characteristic of a between a same signal measurement captured from each of first and second pilot transmissions, and wherein the first pilot transmission occurred before transmission of a most recent said pilot report message and the second pilot transmission occurred after transmission of said most recent pilot report message. 20. An apparatus for managing transmittal of a pilot report message from an access terminal in a wireless communication system, comprising: means for generating a pilot report message in a processor of the access terminal, wherein the pilot report message is used to request addition or deletion of pilots from an active set maintained by an access network; wherein the active set identifies sectors of an access network that are serving the access terminal; means for determining whether a size of the active set is greater than one;means for transmitting the pilot report message if a defined first condition exists and the size of the active set is greater than one, wherein existence of the first condition is determined by making a first explicit determination that the first condition exists as defined; andmeans for transmitting the pilot report message if a defined second condition exists and the size of the active set is one, wherein existence of the second condition is determined by making a second explicit determination that the second condition exists as defined;wherein the second condition differs from the first condition, wherein existence of one of said first and second conditions is defined to require existence of a predetermined relationship between a same signal measurement captured from each of first and second pilot transmissions, and wherein the first pilot transmission occurred before transmission of a most recent said pilot report message and the second pilot transmission occurred after transmission of said most recent pilot report message. 21. The apparatus of claim 20, wherein existence of each of said first and second conditions is defined to require existence of a predetermined relationship between a same signal measurement captured from each of a said first pilot transmission and a said second pilot transmission.
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