IPC분류정보
국가/구분 |
United States(US) Patent
등록
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국제특허분류(IPC7판) |
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출원번호 |
US-0268607
(2014-05-02)
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등록번호 |
US-9491780
(2016-11-08)
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우선권정보 |
CN-2011 1 0341718 (2011-11-02); CN-2012 1 0257740 (2012-07-24) |
발명자
/ 주소 |
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출원인 / 주소 |
- Huawei Technologies Co., Ltd.
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대리인 / 주소 |
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인용정보 |
피인용 횟수 :
3 인용 특허 :
5 |
초록
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A method and a device for processing a random access parameter, so as to properly adjust the random access parameter and improve a success rate of random access includes receiving a random access report of a first cell reported by one or more user terminals, where a random access detection item reco
A method and a device for processing a random access parameter, so as to properly adjust the random access parameter and improve a success rate of random access includes receiving a random access report of a first cell reported by one or more user terminals, where a random access detection item recorded in the random access report includes: at least one of number of times of preamble cycles in each random access, a reason for preamble transmission failure within each preamble cycle period and a random access delay; performing random access detection item statistics according to the random access report and obtaining a statistical value, if the statistical value reaches a preset threshold, adjusting the random access parameter of the first cell; and issuing the adjusted random access parameter to a user terminal belonging to the first cell.
대표청구항
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1. A method for processing a random access parameter, comprising: receiving, by a network device, capability information that indicates whether one or more user terminals support random access parameter optimization, as reported by the one or more user terminals;detecting, by the network device, acc
1. A method for processing a random access parameter, comprising: receiving, by a network device, capability information that indicates whether one or more user terminals support random access parameter optimization, as reported by the one or more user terminals;detecting, by the network device, according to the capability information, whether the one or more user terminals support the random access parameter optimization;issuing, by the network device based on one of a periodic and an event-triggered mechanism, indication information that instructs the one or more user terminals to record a random access report if the one or more user terminals support the random access parameter optimization;receiving, by the network device, the random access report of a first cell reported by the one or more user terminals, wherein a random access detection item recorded in the random access report comprises at least one of: a number of occurrences of a preamble cycle period in each random access, a reason for preamble transmission failure within each preamble cycle period and a random access delay, wherein when one of a number of occurrences of a random access failure (m) divided by a total number of times of access (n), an average access delay, an average number of times of preamble transmission, and number of times of preamble cycle ramp is greater than or equal to the second preset threshold, the random access report of the first cell received by the network device is spontaneously reported by the user terminal;performing, by the network device, random access detection item statistics according to the random access report and obtaining a statistical value;if the statistical value reaches a preset threshold, adjusting, by the network device, the random access parameter of the first cell; andissuing, by the network device, the adjusted random access parameter to a user terminal belonging to the first cell. 2. The method according to claim 1, wherein the random access detection item recorded in the random access report further comprises: at least one of: an identifier of a random access cell, an identifier of a public land mobile network (PLMN) to which the random access cell belongs, information of a time when a random access occurs, a number of occurrences of a random access, a random access type, a radio signal quality of a common pilot channel, a collision indicator, a system message failure indicator, and a redirection indicator. 3. The method according to claim 2, wherein the random access type comprises a random access, or an enhanced random access, or an enhanced random access corresponding to a 2 ms transmission time interval (TTI) length, or an enhanced random access corresponding to a 10 ms TTI length. 4. The method according to claim 2, wherein the redirection indicator indicates that the random access is initiated when the user terminal is redirected to the first cell. 5. The method according to claim 1, wherein the preset threshold comprises at least one of: a random access success probability threshold, a proportional threshold for a number of occurrences of a preamble cycles, a proportional threshold for number of occurrences of a preamble retransmission, a proportional threshold for a preamble transmission power, a proportional threshold for negative acknowledgment information, and a random access delay threshold; wherein when a ratio of a number of occurrences of a random access success in the random access report reported by the one or more user terminals to a total number of occurrences of random accesses is less than the random access success probability threshold, adjusting of the random access parameter of the first cell further comprises: increasing random access resources of the first cell; andwhen a ratio that the number of occurrences of preamble cycles in each random access reaches a maximum value in the random access report reported by the one or more user terminals reaches the proportional threshold for the number of occurrences of preamble cycles, adjusting of the random access parameter of the first cell further comprises: increasing a maximum number of times of preamble cycles in the random access of the first cell; andwhen a reason for a preamble transmission failure within each preamble cycle period in the random access report reported by the one or more user terminals is that a ratio of reaching the maximum number of times of retransmission is greater than the proportional threshold for a number of occurrences of a preamble retransmission, adjusting of the random access parameter of the first cell further comprises: increasing a transmission power of a primary common pilot channel of the first cell, or increasing uplink interference, or increasing a constant factor of random access channel demodulation, or increasing a power ramp step, or increasing a parameter of a maximum number of times of preamble retransmission; andwhen the reason for preamble transmission failure within each preamble cycle period in the random access report reported by the one or more user terminals is that a ratio that the preamble transmission power reaches a maximum value is greater than the proportional threshold for the preamble transmission power, adjusting of the random access parameter of the first cell further comprises: reducing a transmission power of a primary common pilot channel of the first cell, or reducing uplink interference, or reducing a constant factor of random access channel demodulation, or reducing a power ramp step; andwhen the reason for preamble transmission failure within each preamble cycle period in the random access report reported by the one or more user terminals is that a ratio of receiving the negative acknowledgment information on the acquisition indicator channel is greater than the proportional threshold for negative acknowledgment information, adjusting of the random access parameter of the first cell further comprises: increasing random access resources of the first cell; andwhen the random access delay in the random access report reported by the one or more user terminals is greater than the random access delay threshold, adjusting of the random access parameter of the first cell further comprises: increasing random access resources of the first cell. 6. The method according to claim 1, wherein after receiving the random access report of the first cell reported by the one or more user terminals, the method further comprises: if the random access report received by a network device to which the first cell belongs comprises access information of a second cell, forwarding the access information of the second cell to a network device to which the second cell belongs, wherein the network device to which the first cell belongs is different from the network device to which the second cell belongs. 7. A method for processing a random access parameter, comprising: reporting, by a user terminal, capability information that indicates whether one or more user terminals support random access parameter optimization to the network device; andreceiving, by the user terminal, indication information indicates the user terminal to record a random access report, wherein the indication information is issued by the network device based on one of a periodic and an event-triggered mechanism after determining the capability information and acknowledging that the random access parameter optimization is supported;recording, by the user terminal, the random access report, wherein a random access detection item recorded in the random access report comprises at least one of: a number of occurrences of a preamble cycle period in each random access, a reason for preamble transmission failure within each preamble cycle period, and a random access delayreporting, by the user terminal, the random access report to the network device, wherein when one of a number of occurrences of a random access failure (m) divided by a total number of times of access (n), an average access delay, an average number of times of preamble transmission, and number of times of preamble cycle ramp is greater than or equal to the second preset threshold, spontaneously reporting, by the user terminal, the random access report; andreceiving, by the user terminal, and storing the random access parameter adjusted by the network device. 8. The method according to claim 7, wherein the random access detection item recorded in the random access report further comprises: at least one of: an identifier of a random access cell, an identifier of a PLMN to which the random access cell belongs, information of a time when a random access occurs, a number of occurrences of a random access, a random access type, a radio signal quality of a common pilot channel, a collision indicator, a system message failure indicator, and a redirection indicator. 9. The method according to claim 8, wherein the random access type comprises a random access, or an enhanced random access, or an enhanced random access corresponding to a 2 ms TTI length, or an enhanced random access corresponding to a 10 ms TTI length. 10. The method according to claim 8, wherein the redirection indicator indicates that the random access is initiated when the user terminal is redirected to the first cell. 11. The method according to claim 7, wherein before reporting the random access report to the network device, the method further comprises: reporting to the network device that the user terminal records the random access report. 12. The method according to claim 7, wherein before reporting the random access report to the network device, the method further comprises: receiving request information issued by the network device, wherein the request information is used to request the user terminal to report the random access report to the network device. 13. The method according to claim 7, wherein: when the random access report records information of a successful random access, the random access report records the identifier of the random access cell;when the random access report records information of a failed random access, the random access report records at least one of: a number of occurrences of a random access, an identifier of a random access cell, an identifier of a public land mobile network (PLMN) to which the random access cell belongs, information of a time when a random access occurs, a number of occurrences of a preamble cycle period in each random access, a reason for preamble transmission failure within each preamble cycle period, a random access type, a radio signal quality of a common pilot channel and a random access delay. 14. The method according to claim 13, wherein: when the random access report records random access success information, the random access report further records the PLMN identifier and/or the random access type after recording the identifier of the random access cell. 15. The method according to claim 7, wherein: when a number of occurrences of a transmission of a preamble or a number of occurrences of a preamble cycle period in the random access reaches a first preset threshold, the random access report records at least one of: a number of occurrences of a random access, an identifier of a random access cell, an identifier of a public land mobile network PLMN to which a random access cell belongs, information of a time when a random access occurs, a number of occurrences of a preamble cycle period in each random access, a reason for preamble transmission failure within each preamble cycle period, a random access type, a radio signal quality of a common pilot channel and a random access delay;when the number of occurrences of a transmission of the preamble or the number of occurrences of the preamble cycle period in the random access fails to reach the first preset threshold, the random access report records the identifier of the random access cell. 16. The method according to claim 15, when the number of occurrences of a transmission of the preamble or the number of occurrences of the preamble cycles period in the random access fails to reach the first preset threshold, the random access report further records the PLMN identifier or the random access type after recording the identifier of the random access cell. 17. The method according to claim 7, wherein: when one of a value of a number of occurrences of a random access failure (m) divided by a total number of times of access (n), an average access delay, an average number of times of preamble transmission, and number of times of preamble cycle ramp is greater than or equal to a second preset threshold, storing the random access report. 18. A network device, comprising: a receiver configured to receive a random access report of a first cell reported by one or more user terminals, wherein a random access detection item recorded in the random access report comprises at least one of: a number of occurrences of a preamble cycle period in each random access, a reason for preamble transmission failure within each preamble cycle period and a random access delay, wherein when one of a number of occurrences of a random access failure (m) divided by a total number of times of access (n), an average access delay, an average number of times of preamble transmission, and number of times of preamble cycle ramp is greater than or equal to the second preset threshold, the random access report of the first cell received by the network device is spontaneously reported by the user terminal;a processor configured to perform random access detection item statistics according to the random access report and to obtain a statistical value,if the statistical value reaches a preset threshold, the processor is configured to adjust the random access parameter of the first cell; anda transmitter configured to issue the adjusted random access parameter to a user terminal belonging to the first cell;wherein the receiver is further configured to receive capability information that indicates whether the one or more user terminals support random access parameter optimization, as reported by the one or more user terminals;the network device further comprises a detector configured to detect, according to the capability information, whether the one or more user terminals support the random access parameter optimization; andthe transmitter is further configured to issue, based on one of a periodic and an event-triggered mechanism, indication information that instructs the one or more user terminals to record the random access report if the one or more user terminals support the random access parameter optimization. 19. The network device according to claim 18, wherein the random access detection item recorded in the random access report further comprises: at least one of: an identifier of a random access cell, an identifier of a PLMN to which the random access cell belongs, information of a time when a random access occurs, a number of occurrences of a random access, a random access type, a radio signal quality of a common pilot channel, a collision indicator, a system message failure indicator, and a redirection indicator. 20. The network device according to claim 19, wherein the random access type comprises a random access, or an enhanced random access, or an enhanced random access corresponding to a 2 ms transmission time interval (TTI) length, or an enhanced random access corresponding to a 10 ms TTI length. 21. The network device according to claim 19, wherein the redirection indicator indicates that the random access is initiated when the user terminal is redirected to the first cell. 22. The network device according to claim 18, wherein the preset threshold comprises at least one of: a random access success probability threshold, a proportional threshold for number of occurrences of a preamble cycle period, a proportional threshold for number of times of preamble retransmission, a proportional threshold for a preamble transmission power, and a proportional threshold for negative acknowledgment information, and the processor is further configured to: increase random access resources of the first cell when a ratio of the number of occurrences of the random access success in the random access report of the first cell reported by one or more user terminals to total number of occurrences of random accesses is less than the random access success probability threshold; andincrease a maximum number of occurrences of cycles in the random access of the first cell when a ratio that the number of occurrences of preamble cycles in each random access reaches maximum value in the random access report of the first cell, as reported by one or more user terminals, reaches the proportional threshold for the number of occurrences of preamble cycles; andincrease a transmission power of a primary common pilot channel of the first cell, or increase uplink interference, or increase a constant factor of random access channel demodulation, or increase a power ramp step, or increase a parameter of a maximum number of occurrences of preamble retransmissions, wherein a reason for preamble transmission failure within each preamble cycle period in the random access report of the first cell, as reported by one or more user terminals, is that a ratio of occurrences of reaching the maximum number of occurrences of retransmission is greater than the proportional threshold for the number of times of preamble retransmission; andreduce a transmission power of a primary common pilot channel of the first cell, or reduce uplink interference, or reduce a constant factor of random access channel demodulation, or reduce a power ramp step, when the reason for preamble transmission failure within each preamble cycle period in the random access report of the first cell, as reported by one or more user terminals is that a ratio that the preamble transmission power reaches a maximum value is greater than the proportional threshold for the preamble transmission power; andincrease random access resources of the first cell when the reason for preamble transmission failure within each preamble cycle period in the random access report of the first cell, as reported by one or more user terminals, is that a ratio of receiving the negative acknowledgment information on the acquisition indicator channel is greater than the proportional threshold for negative acknowledgment information; andincrease random access resources of the first cell when the random access delay in the random access report reported by one or more user terminals is greater than the random access delay threshold. 23. The network device according to claim 18, wherein the transmitter is further configured to forward the access information of the second cell to a network device to which the second cell belongs if the random access report received by a network device to which the first cell belongs comprises access information of a second cell, wherein the network device to which the first cell belongs is different from the network device to which the second cell belongs. 24. The network device according to claim 18, wherein the transmitter is further configured to issue request information for requesting one or more user terminals to report the random access report. 25. A user terminal, comprising: a processor configured to record a random access report and store the random access parameter adjusted by the network device, wherein a random access detection item recorded in the random access report comprises at least one of: a number of occurrences of a preamble cycle period in each random access, a reason for preamble transmission failure within each preamble cycle period and a random access delay;a transmitter configured to report the random access report to the network device, wherein when one of a number of occurrences of a random access failure (m) divided by a total number of times of access (n), an average access delay, an average number of times of preamble transmission, and number of times of preamble cycle ramp is greater than or equal to the second preset threshold, the transmitter is further configured to spontaneously report the random access report; anda receiver configured to receive the random access parameter adjusted by the network device;wherein the transmitter is further configured to report capability information that indicates whether the user terminal supports random access parameter optimization to the network device;the receiver is further configured to receive indication information for instructing the user terminal to record the random access report, wherein the indication information is issued by the network device based on one of a periodic and an event-triggered mechanism after determining the capability information and acknowledging that the random access parameter optimization is supported. 26. The user terminal according to claim 25, wherein the random access detection item recorded in the random access report further comprises: at least one of: an identifier of a random access cell, an identifier of a PLMN to which the random access cell belongs, information of a time when a random access occurs, a number of occurrences of a random access, a random access type, a radio signal quality of a common pilot channel, a collision indicator, a system message failure indicator, and a redirection indicator. 27. The user terminal according to claim 26, wherein the random access type comprises a random access, or an enhanced random access, or an enhanced random access corresponding to a 2 ms TTI length, or an enhanced random access corresponding to a 10 ms TTI length. 28. The user terminal according to claim 26, wherein the redirection indicator indicates whether the random access is initiated when the user terminal is redirected to the first cell. 29. The user terminal according to claim 25, wherein the receiver is further configured to receive request information for requesting to report the random access report to the network device, issued by the network device. 30. The method according to claim 7, wherein: when one of a value of m divided by n, an average access delay, an average number of times of preamble transmission, and number of times of preamble cycle ramp is less than a second preset threshold, deleting the random access report.
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