IPC분류정보
국가/구분 |
United States(US) Patent
등록
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국제특허분류(IPC7판) |
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출원번호 |
US-0943517
(2007-11-20)
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등록번호 |
US-8411646
(2013-04-02)
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발명자
/ 주소 |
- Wu, Xinzhou
- Rangan, Sundeep
- Hande, Prashanth
- Das, Arnab
- Li, Junyi
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출원인 / 주소 |
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대리인 / 주소 |
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인용정보 |
피인용 횟수 :
0 인용 특허 :
14 |
초록
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Systems and methodologies are described that facilitate scheduling uplink transmissions. For instance, a time sharing scheme can be utilized such that differing mobile devices can be scheduled to transmit during differing time slots; however, it is also contemplated that a static scheme can be emplo
Systems and methodologies are described that facilitate scheduling uplink transmissions. For instance, a time sharing scheme can be utilized such that differing mobile devices can be scheduled to transmit during differing time slots; however, it is also contemplated that a static scheme can be employed. Pursuant to an illustration, an interference budget can be combined with a time varying weighting factor associated with a base station; the weighting factor can be predefined and/or adaptively adjusted (e.g., based upon a load balancing mechanism). Moreover, the weighted interference budget can be leveraged for selecting mobile devices for uplink transmission (e.g., based at least in part upon path loss ratios of the mobile devices). Further, disparate interference budgets can be utilized by differing channels of a sector at a particular time. Also, for example, a base station can assign a loading factor to be utilized by wireless terminal(s) for generating channel quality report(s).
대표청구항
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1. A method that facilitates scheduling uplink transmissions in a communication network including a first base station that includes a first sector utilizing a dynamic loading offset level pattern, the method comprising: broadcasting a first loading factor based on a first loading offset level deter
1. A method that facilitates scheduling uplink transmissions in a communication network including a first base station that includes a first sector utilizing a dynamic loading offset level pattern, the method comprising: broadcasting a first loading factor based on a first loading offset level determined from a first time varying loading offset level pattern corresponding to a first time slot;broadcasting a second loading factor based on a second loading offset level determined from the first time varying loading offset level pattern corresponding to a second time slot, the first loading offset level differing from the second loading offset level by at least 0.5 dB;receiving channel quality reports from one or more mobile devices pertaining to evaluated path loss ratios during the first time slot and the second time slot;scheduling a first mobile device for uplink transmission during the first time slot on a first channel based on the channel quality reports and the first loading factor;scheduling a second mobile device for uplink transmission during the second time slot on the first channel based on the channel quality reports and the second loading factor; andtransmitting assignments to the first mobile device and the second mobile device related to the scheduled uplink transmissions. 2. The method of claim 1, wherein the assignments include information related to a maximum interference budget assigned to the corresponding mobile device for the uplink transmission. 3. The method of claim 1, further comprising: broadcasting a third loading factor based on a third loading offset level determined from a second time varying loading offset level pattern corresponding to the first time slot;broadcasting a fourth loading factor based on a fourth loading offset level determined from the second time varying loading offset level pattern corresponding to the second time slot, the third loading offset level differing from the fourth loading offset level by at least 0.5 dB;scheduling a third mobile device for uplink transmission during the first time slot on a second channel based at least in part upon the channel quality reports and the third loading factor; andscheduling a fourth mobile device for uplink transmission during the second time slot on the second channel based at least in part upon the channel quality reports and the fourth loading factor. 4. The method of claim 3, wherein a summation of the first loading offset level and the third loading offset level is within 0.5 dB of a summation of the second loading offset level and the fourth loading offset level. 5. The method of claim 3, wherein a first frequency bandwidth associated with the first channel is non-overlapping with a second frequency bandwidth associated with the second channel. 6. The method of claim 1, wherein the first base station further includes a second sector, the method further comprising: broadcasting a fifth loading factor based on a fifth loading offset level determined from a third time varying loading offset level pattern corresponding to the first time slot utilized to evaluate a path loss ratio corresponding to the second sector;broadcasting a sixth loading factor based on a sixth loading offset level determined from the third time varying loading offset level pattern corresponding to the second time slot utilized to evaluate a path loss ratio corresponding to the second sector, the fifth loading offset level differing from the sixth loading offset level by at least 0.5 dB;scheduling a fifth mobile device for uplink transmission during the first time slot on the first channel based at least in part upon the channel quality reports and the fifth loading factor; andscheduling a sixth mobile device for uplink transmission during the second time slot on the first channel based at least in part upon the channel quality reports and the sixth loading factor. 7. The method of claim 6, wherein the first time varying loading offset level pattern and the third time varying loading offset level pattern are periodical with dissimilar periods. 8. The method of claim 6, wherein the first time varying loading offset level pattern and the third time varying loading offset level pattern are periodical with substantially similar periods and differing phases. 9. The method of claim 1, wherein the communication network further includes a second base station that includes a third sector, the method further comprising: broadcasting a seventh loading factor based on a seventh loading offset level determined from a fourth time varying loading offset level pattern corresponding to the first time slot utilized to evaluate a path loss ratio corresponding to the third sector;broadcasting an eighth loading factor based on an eighth loading offset level determined from the fourth time varying loading offset level pattern corresponding to the second time slot utilized to evaluate a path loss ratio corresponding to the third sector, the seventh loading offset level differing from the eighth loading offset level by at least 0.5 dB;scheduling a seventh mobile device for uplink transmission during the first time slot on the first channel based at least in part upon the channel quality reports and the seventh loading factor; andscheduling an eighth mobile device for uplink transmission during the second time slot on the first channel based at least in part upon the channel quality reports and the eighth loading factor. 10. The method of claim 9, wherein the first time varying loading offset level pattern and the fourth time varying loading offset level pattern are periodical with dissimilar periods. 11. The method of claim 9, wherein the first time varying loading offset level pattern and the fourth time varying loading offset level pattern are periodical with substantially similar periods and differing phases. 12. A wireless communications apparatus, comprising: a memory that retains instructions related to broadcasting a first loading factor based on a first loading offset level determined from a first time varying loading offset level pattern corresponding to a first time slot, broadcasting a second loading factor based on a second loading offset level determined from the first time varying loading offset level pattern corresponding to a second time slot, the first loading offset level differs from the second loading offset level by at least 0.5 dB, receiving channel quality reports from one or more mobile devices pertaining to evaluated path loss ratios during the first time slot and the second time slot, scheduling a first mobile device for uplink transmission during the first time slot on a first channel based on the channel quality reports and the first loading factor, scheduling a second mobile device for uplink transmission during the second time slot on the first channel based on the channel quality reports and the second loading factor, and sending assignments to the first mobile device and the second mobile device related to the scheduled uplink transmissions; anda processor, coupled to the memory, configured to execute the instructions retained in the memory. 13. The wireless communications apparatus of claim 12, wherein said wireless communications apparatus is a serving first base station: andwherein the channel quality reports include a measurement of an interference ratio between a signal strength from the serving first base station to a respective mobile device and a weighted sum of signal strengths from interfering base stations, wherein the weight is a function of a respective loading factor for a particular time slot. 14. The wireless communications apparatus of claim 12, wherein the memory further retains instructions related to broadcasting a third loading factor based on a third loading offset level determined from a second time varying loading offset level pattern corresponding to the first time slot, broadcasting a fourth loading factor based on a fourth loading offset level determined from the second time varying loading offset level pattern corresponding to the second time slot, the third loading offset level differing from the fourth loading offset level by at least 0.5 dB, scheduling a third mobile device for uplink transmission during the first time slot on a second channel based at least in part upon the channel quality reports and the third loading factor, and scheduling a fourth mobile device for uplink transmission during the second time slot on the second channel based at least in part upon the channel quality reports and the fourth loading factor. 15. The wireless communications apparatus of claim 12, wherein the memory further retains instructions related to broadcasting a fifth loading factor based on a fifth loading offset level determined from a third time varying loading offset level pattern corresponding to the first time slot utilized to evaluate a path loss ratio corresponding to a second sector, broadcasting a sixth loading factor based on a sixth loading offset level determined from the third time varying loading offset level pattern corresponding to the second time slot utilized to evaluate a path loss ratio corresponding to the second sector, the fifth loading offset level differs from the sixth loading offset level by at least 0.5 dB, scheduling a fifth mobile device for uplink transmission during the first time slot on the first channel based at least in part upon the channel quality reports and the fifth loading factor, and scheduling a sixth mobile device for uplink transmission during the second time slot on the first channel based at least in part upon the channel quality reports and the sixth loading factor. 16. The wireless communications apparatus of claim 15, wherein said wireless communications apparatus is a first wireless communication base station that includes a first sector and the second sector. 17. The wireless communications apparatus of claim 15, wherein said wireless communications apparatus is a first wireless communication base station that includes a first sector and wherein a second wireless communication base station includes the second sector. 18. The wireless communications apparatus of claim 15, wherein the first time varying loading offset level pattern and the third time varying loading offset level pattern have at least one of differing periods and differing phases. 19. A wireless communications apparatus that enables scheduling uplink transmissions by utilizing a dynamic loading offset level pattern, comprising: means for broadcasting a first loading factor based on a first loading offset level determined from a first time varying loading offset level pattern based on a first time slot;means for broadcasting a second loading factor based on a second loading offset level determined from the first time varying loading offset level pattern based on a second time slot, wherein the first loading offset level differs from the second loading offset level by at least 0.5 dB;means for obtaining channel quality reports from at least one mobile device related to analyzed path loss ratios;means for scheduling a first mobile device for uplink transmission during the first time slot on a first channel based on the channel quality reports and the first loading factor;means for scheduling a second mobile device for uplink transmission during the second time slot on the first channel based on the channel quality reports and the second loading factor; andmeans for sending assignments to the first mobile device and the second mobile device. 20. The wireless communications apparatus of claim 19, further comprising: means for broadcasting a third loading factor based on a third loading offset level and a fourth loading factor based on a fourth loading offset level, the third loading factor being determined from a second time varying loading offset level pattern corresponding to the first time slot and the fourth loading factor being determined from the second time varying loading offset level pattern corresponding to the second time slot, the third loading offset level differing from the fourth loading offset level by at least 0.5 dB; andmeans for scheduling a third mobile device and a fourth mobile device for uplink transmission, the third mobile device being scheduled during the first time slot on a second channel based at least in part upon the channel quality reports and the third loading factor and the fourth mobile device being scheduled during the second time slot on the second channel based at least in part upon the channel quality reports and the fourth loading factor. 21. The wireless communications apparatus of claim 19, further comprising: means for broadcasting a fifth loading factor based on a fifth loading offset level and a sixth loading factor based on a sixth loading offset level, the fifth loading factor being determined from a third time varying loading offset level pattern corresponding to the first time slot utilized to evaluate a path loss ratio corresponding to a second sector and the sixth loading factor being determined from the third time varying loading offset level pattern corresponding to the second time slot utilized to evaluate a path loss ratio corresponding to the second sector, the fifth loading offset level differing from the sixth loading offset level by at least 0.5 dB; andmeans for scheduling a fifth mobile device and a sixth mobile device for uplink transmission, the fifth mobile device being scheduled during the first time slot on the first channel based at least in part upon the channel quality reports and the fifth loading factor and the sixth mobile device being scheduled during the second time slot on the first channel based at least in part upon the channel quality reports and the sixth loading factor. 22. A non-transitory machine-readable medium having stored thereon machine-executable instructions for controlling a first base station, the non-transitory machine-readable medium including machine-executable instructions which when executed by a processor control said first station to perform the steps of: broadcasting a first loading factor based on a first loading offset level and a second loading factor based on a second loading offset level identified from a first time varying loading offset level pattern, the first loading factor corresponding to a first time slot and the second loading factor corresponding to a second time slot, wherein the first loading offset level differs from the second loading offset level by at least 0.5 dB;receiving channel quality reports from at least one mobile device related path loss ratios generated based upon the first loading factor and the second loading factor; andscheduling a first mobile device for uplink transmission during the first time slot and a second mobile device for uplink transmission during the second time slot based upon the channel quality reports. 23. The non-transitory machine-readable medium of claim 22, further comprising machine-executable instructions which when executed by the processor control said first station to perform the steps of: broadcasting a third loading factor based on a third loading offset level and a fourth loading factor based on a fourth loading offset level identified from a second time varying loading offset level pattern associated with a second sector, the second time varying loading offset level pattern and the first time varying loading offset level pattern having at least one of disparate periods and disparate phases, the third loading factor corresponding to the first time slot and the fourth loading factor corresponding to the second time slot; andscheduling a third mobile device for uplink transmission during the first time slot and a fourth mobile device for uplink transmission during the second time slot based upon the channel quality reports. 24. In a wireless communications system, an apparatus comprising: a processor configured to: broadcast a first loading factor based on a first loading offset level and a second loading factor based on a second loading offset level identified from a first time varying loading offset level pattern, the first loading factor corresponding to a first time slot and the second loading factor corresponding to a second time slot, wherein the first loading offset level differs from the second loading offset level by at least 0.5 dB;obtain channel quality reports from at least one mobile device related path loss ratios generated based upon the first loading factor and the second loading factor; andschedule a first mobile device for uplink transmission during the first time slot and a second mobile device for uplink transmission during the second time slot based upon the channel quality reports. 25. A method of operating a wireless mobile device in an environment that utilizes a dynamic loading offset level pattern, the method comprising: receiving a first loading factor based on at least a first loading offset information from a first base station at a first time slot;determining a first loading offset level pattern from the first loading offset information;determining a first interference ratio at a second time slot based on at least a first loading offset level determined by the first loading offset level pattern;determining a second interference ratio at a third time slot based on at least a second loading offset level determined by the first loading offset level pattern, the first loading offset level and the second loading offset level differing by at least 0.5 dB;sending a first signal that includes the first interference ratio at the second time slot to the first base station; andsending a second signal that includes the second interference ratio at the third time slot to the first base station. 26. The method of claim 25, further comprising determining the first loading offset level pattern by employing a lookup table. 27. The method of claim 25, further comprising determining the first loading offset level pattern by utilizing a predetermined function. 28. The method of claim 25, further comprising: receiving a second loading factor that includes at least a second loading offset information from a second base station at a fourth time slot;determining a second loading offset level pattern from the second loading offset information by employing at least one of a lookup table or a predetermined function; anddetermining the first interference ratio based on at least the first loading offset level determined by the first loading offset level pattern and the second loading offset level determined by the second loading offset level pattern. 29. A wireless communications apparatus, comprising: a memory that retains instructions related to obtaining a first loading factor based on at least a first loading offset information from a first base station during a first time slot, deciphering a first loading offset level pattern based upon the first loading offset information, generating a first interference ratio during a second time slot based on a first loading offset level recognized based upon the first loading offset level pattern, determining a second interference ratio during a third time slot based on a second loading offset level recognized based upon the first loading offset level pattern, the first loading offset level and the second loading offset level differing by at least 0.5 dB, transmitting a first signal that includes the first interference ratio during the second time slot to the first base station, and transmitting a second signal that includes the second interference ratio during the third time slot to the first base station; anda processor, coupled to the memory, configured to execute the instructions retained in the memory. 30. The wireless communications apparatus of claim 29, wherein the memory further retains a lookup table utilized to decipher the first loading offset level pattern based upon the first loading offset information. 31. The wireless communications apparatus of claim 29, wherein the memory further retains instructions related to utilizing a predetermined function to decipher the first loading offset level pattern. 32. The wireless communications apparatus of claim 29, wherein the memory further retains instructions related obtaining a second loading factor that includes a second loading offset information from a second base station during a fourth time slot, deciphering a second loading offset level pattern from the second loading offset information by employing one or more of a lookup table or a predetermined function, and generating the first interference ratio for transmission based on at least the first loading offset level recognized based upon the first loading offset level pattern and the second loading offset level determined by the second loading offset level pattern. 33. A wireless communications apparatus that enables evaluating an interference ratio based upon a dynamic loading offset level pattern, comprising: means for obtaining a first loading factor based on at least a first loading offset information from a first base station at a first time slot;means for determining a first loading offset level pattern from the first loading offset information;means for evaluating a first interference ratio at a second time slot based on a first loading offset level determined from the first loading offset level pattern;means for determining a second interference ratio at a third time slot based on a second loading offset level determined from the first loading offset level pattern, the first loading offset level and the second loading offset level differing by at least 0.5 dB;means for transmitting a first signal that includes the first interference ratio at the second time slot to the first base station; andmeans for transmitting a second signal that includes the second interference ratio at the third time slot to the first base station. 34. The wireless communications apparatus of claim 33, further comprising: means for obtaining a second loading factor that includes a second loading offset information from a second base station at a fourth time slot;means for determining a second loading offset level pattern from the second loading offset information by employing at least one of a lookup table or a predetermined function; andmeans for evaluating the first interference ratio based on at least the first loading offset level determined by the first loading offset level pattern and the second loading offset level determined by the second loading offset level pattern. 35. A non-transitory machine-readable medium having stored thereon machine-executable instructions for controlling a wireless mobile device, said non-transitory machine-readable medium including machine-executable instructions which when executed by a processor control said wireless mobile device to perform the steps of: obtaining a first loading factor based on at least a first loading offset information from a first base station at a first time slot;determining a first loading offset level pattern from the first loading offset information by employing at least one of a lookup table or a predetermined function;evaluating a first interference ratio at a second time slot based on a first loading offset level determined from the first loading offset level pattern;determining a second interference ratio at a third time slot based on a second loading offset level determined from the first loading offset level pattern, the first loading offset level and the second loading offset level differing by at least 0.5 dB;transmitting a first signal that includes the first interference ratio at the second time slot to the first base station; andtransmitting a second signal that includes the second interference ratio at the third time slot to the first base station. 36. The non-transitory machine-readable medium of claim 35, further comprising machine-executable instructions which when executed by said processor control said wireless mobile device to perform the steps of: obtaining a second loading factor that includes a second loading offset information from a second base station at a fourth time slot;determining a second loading offset level pattern from the second loading offset information by employing at least one of a lookup table or a predetermined function; andevaluating the first interference ratio based on at least the first loading offset level determined by the first loading offset level pattern and the second loading offset level determined by the second loading offset level pattern. 37. In a wireless communications system, an apparatus comprising: a processor configured to: receive a first loading factor based on at least a first loading offset information from a first base station at a first time slot;determine a first loading offset level pattern from the first loading offset information;determine a first interference ratio at a second time slot based on at least a first loading offset level determined by the first loading offset level pattern;determine a second interference ratio at a third time slot based on a second loading offset level determined from the first loading offset level pattern, the first loading offset level and the second loading offset level differing by at least 0.5 dB;send a first signal that includes the first interference ratio at the second time slot to the first base station; andsend a second signal that includes the second interference ratio at the third time slot to the first base station.
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