WO2014075253A1 - Procédé, dispositif et système destinés à l'attribution d'une section de ressource de fréquence - Google Patents

Procédé, dispositif et système destinés à l'attribution d'une section de ressource de fréquence Download PDF

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Publication number
WO2014075253A1
WO2014075253A1 PCT/CN2012/084646 CN2012084646W WO2014075253A1 WO 2014075253 A1 WO2014075253 A1 WO 2014075253A1 CN 2012084646 W CN2012084646 W CN 2012084646W WO 2014075253 A1 WO2014075253 A1 WO 2014075253A1
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WO
WIPO (PCT)
Prior art keywords
frequency resource
resource segment
segment
interference value
candidate
Prior art date
Application number
PCT/CN2012/084646
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English (en)
Chinese (zh)
Inventor
马守贵
朱希云
胡宁
Original Assignee
华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to PCT/CN2012/084646 priority Critical patent/WO2014075253A1/fr
Priority to CN201280027566.2A priority patent/CN103703851B/zh
Publication of WO2014075253A1 publication Critical patent/WO2014075253A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H04W74/0866—Non-scheduled access, e.g. ALOHA using a dedicated channel for access

Definitions

  • the present invention relates to the field of communications, and in particular, to a method, device, and system for allocating frequency resource segments.
  • the process of random access of the user equipment is: the UE sends a random access preamble (message 1) on the Physical Random Access Channel (PRACH), and the base station receives After the random access preamble, the random access response (message 2) is sent to the user equipment, and after receiving the random access response, the UE sends a scheduling transmission (message 3), and the base station performs collision detection, and issues a competition resolution.
  • a random access preamble (message 1) on the Physical Random Access Channel (PRACH)
  • PRACH Physical Random Access Channel
  • the base station receives After the random access preamble, the random access response (message 2) is sent to the user equipment, and after receiving the random access response, the UE sends a scheduling transmission (message 3), and the base station performs collision detection, and issues a competition resolution.
  • PRACH Physical Random Access Channel
  • the UE needs to receive the frequency offset information of the PRACH sent by the base station in the random access process, and the UE determines the transmission location of the random access preamble according to the information.
  • the base station After the cell is established, the base station always uses the previous PRACH channel.
  • the resource block (RB) occupied by the PRACH channel is interfered, the success rate of the user equipment access is small, and the access time is extended. The coverage of the base station is small.
  • the embodiments of the present invention provide a method, a device, and a system for allocating a frequency resource segment, which are used to improve the access success rate of the user equipment, reduce the access delay, and improve the coverage of the base station.
  • the embodiment of the present invention adopts the following technical solutions:
  • a method for allocating a frequency resource segment including:
  • the determining the PRACH letter Whether the quality index of the first frequency resource segment currently occupied by the channel meets the quality requirement which is embodied as:
  • the interference value of the first frequency resource segment is greater than the preset interference threshold, determining that the quality indicator of the first frequency resource segment does not meet the quality requirement.
  • the determining whether the quality indicator of the first frequency resource segment currently occupied by the PRACH channel meets the quality requirement is specifically implemented as:
  • the interference value of the first frequency resource segment is greater than the preset interference threshold, or the false alarm probability of the first frequency resource segment is greater than the preset false alarm threshold, determining the quality indicator of the first frequency resource segment Does not meet the quality requirements.
  • the re-allocating the second frequency resource segment for the PRACH channel is implemented as follows:
  • the candidate frequency resource segment is allocated to the PRACH channel as the second frequency resource segment;
  • any one of the at least two candidate frequency resource segments is used as the second frequency resource
  • the segment is allocated to the PRACH channel, or the candidate frequency resource segment with the smallest interference value in the at least two candidate frequency resource segments is allocated as the second frequency resource segment to the PRACH channel, or A candidate frequency resource segment that is closest to the edge frequency band among the at least two candidate frequency resource segments is allocated as the second frequency resource segment to the PRACH channel.
  • the determining whether the quality indicator of the first frequency resource segment currently occupied by the PRACH channel meets the quality requirement is specifically implemented as: Detecting an interference value of the first frequency resource segment and an interference value of the candidate frequency resource segment; if the difference between the interference value of the first frequency resource segment and the interference value of the candidate frequency resource segment is sufficiently large, determining the The quality indicator of the first frequency resource segment does not meet the quality requirement.
  • the determining whether the quality indicator of the first frequency resource segment currently occupied by the PRACH channel meets the quality requirement is specifically implemented as:
  • the quality indicator of the first frequency resource segment does not meet the quality requirement.
  • the re-allocating the second frequency resource segment for the PRACH channel is implemented as follows:
  • the candidate frequency resource segment is allocated to the second frequency resource segment as the second frequency resource segment.
  • any one of the at least two candidate frequency resource segments is selected The frequency resource segment is allocated to the PRACH channel as the second frequency resource segment, or the candidate frequency resource segment with the smallest interference value in the at least two candidate frequency resource segments is allocated as the second frequency resource segment And the PRACH channel, or the candidate frequency resource segment that is closest to the edge frequency band of the at least two candidate frequency resource segments is allocated to the PRACH channel as the second frequency resource segment.
  • the determining whether the quality indicator of the first frequency resource segment currently occupied by the PRACH channel meets the quality requirement is specifically implemented as:
  • the re-allocating the second frequency for the PRACH channel is implemented as:
  • a candidate frequency resource segment farthest from the first frequency resource segment is allocated as the second frequency resource segment to the PRACH channel.
  • the method further includes: setting an update period, corresponding,
  • Determining whether the quality indicator of the first frequency resource segment currently occupied by the PRACH channel meets the quality requirement includes: determining, in each update period, whether the quality indicator of the first frequency resource segment meets the quality requirement;
  • Re-allocating the second frequency resource segment for the PRACH channel if the quality indicator does not meet the quality requirement, including: in each update period, if the quality indicator does not meet the quality requirement, Re-allocating a second frequency resource segment for the PRACH channel;
  • the resource segment is sent to the user equipment, so that the user equipment performs random access on the second frequency resource segment.
  • a base station for allocating a frequency resource segment including:
  • a determining unit configured to determine whether a quality indicator of the first frequency resource segment currently occupied by the PRACH channel meets a quality requirement
  • An allocating unit configured to: when the quality indicator does not meet the quality requirement,
  • a sending unit configured to send the second frequency resource segment to the user equipment, so that the user equipment performs random access on the second frequency resource segment.
  • the determining unit includes: a first detecting module, configured to detect an interference value of the first frequency resource segment;
  • the first determining module is configured to determine that the quality indicator of the first frequency resource segment does not meet the quality requirement when the interference value of the first frequency resource segment is greater than a preset interference threshold.
  • the determining unit includes: a second detecting module, configured to detect an interference value of the first frequency resource segment and the first False alarm probability of a frequency resource segment;
  • a second determining module configured to determine, when the interference value of the first frequency resource segment is greater than a preset interference threshold, or the false alarm probability of the first frequency resource segment is greater than the preset false alarm threshold The quality indicator of a frequency resource segment does not meet the quality requirements.
  • the allocation unit includes:
  • a detection candidate module configured to detect an interference value of a candidate frequency resource segment
  • An allocation module configured to allocate, when the interference value of only one candidate frequency resource segment is smaller than the interference value of the first frequency resource segment, the candidate frequency resource segment as the second frequency resource segment to the PRACH channel;
  • any one of the at least two candidate frequency resource segments is used as the second frequency resource
  • the segment is allocated to the PRACH channel, or the candidate frequency resource segment with the smallest interference value in the at least two candidate frequency resource segments is allocated as the second frequency resource segment to the PRACH channel, or A candidate frequency resource segment that is closest to the edge frequency band among the at least two candidate frequency resource segments is allocated as the second frequency resource segment to the PRACH channel.
  • the determining unit includes: a third detecting module, configured to detect an interference value of the candidate frequency resource segment;
  • the third determining module is configured to: when the difference between the interference value of the first frequency resource segment and the interference value of the candidate frequency resource segment is sufficiently large, determine that the quality indicator of the first frequency resource segment does not meet the quality requirement.
  • the determining unit includes: a fourth detecting module, configured to detect a false alarm probability of the first frequency resource segment; and a fourth determining module, configured to Determining that the difference between the interference value of the first frequency resource segment and the interference value of the candidate frequency resource segment is sufficiently large, or the false alarm probability of the first frequency resource segment is greater than the preset false alarm threshold The quality indicator of a frequency resource segment does not meet the quality requirements.
  • the allocating unit is specifically configured to: when there is only one candidate frequency resource segment, the first frequency When the difference between the interference value of the resource segment and the interference value of the candidate frequency resource segment is sufficiently large, the candidate frequency resource segment is allocated to the PRACH channel as the second frequency resource segment; or
  • any one of the at least two candidate frequency resource segments is selected
  • the frequency resource segment is allocated to the PRACH channel as the second frequency resource segment, or the candidate frequency resource segment with the smallest interference value in the at least two candidate frequency resource segments is allocated as the second frequency resource segment
  • the PRACH channel, or the candidate frequency resource segment that is closest to the edge frequency band of the at least two candidate frequency resource segments is allocated to the PRACH channel as the second frequency resource segment.
  • the determining unit includes: a fifth detecting module, configured to detect a false alarm probability of the first frequency resource segment; and a fifth determining module, configured to When the false alarm probability of the first frequency resource segment is greater than the preset false alarm threshold, it is determined that the quality indicator of the first frequency resource segment does not meet the quality requirement.
  • the allocating unit is configured to allocate a candidate frequency resource segment that is farthest from the first frequency resource segment as the second frequency resource segment to the PR ACH channel.
  • the base station further includes:
  • An update cycle setting unit for setting an update cycle for setting an update cycle
  • the determining unit is further configured to: determine, in each update period, whether the quality indicator of the first frequency resource segment meets a quality requirement;
  • the allocating unit is further configured to re-allocate a second frequency resource segment for the PRACH channel, if the quality indicator does not meet the quality requirement, in each update period, where the sending unit is further configured to: The second frequency resource segment is sent to the user equipment in each update period, so that the user equipment performs random access on the second frequency resource segment.
  • a base station for allocating a frequency resource segment including:
  • a processor configured to determine whether a quality indicator of a first frequency resource segment currently occupied by the PRACH channel meets a quality requirement, and when the quality indicator does not meet the quality requirement, re-allocating the second frequency resource segment for the PRACH channel;
  • a transmitter configured to send the second frequency resource segment to the user equipment, so that the user equipment performs random access on the second frequency resource segment.
  • the processor is specifically configured to: detect an interference value of the first frequency resource segment, and when the interference value of the first frequency resource segment is greater than a preset interference threshold, determine that the quality indicator of the first frequency resource segment is not Meet the quality requirements.
  • the processor is specifically configured to: detect a false alarm probability of the first frequency resource segment, where an interference value of the first frequency resource segment is greater than a preset interference threshold, or a false alarm probability of the first frequency resource segment If the preset false alarm threshold is greater than, the quality indicator of the first frequency resource segment does not meet the quality requirement.
  • the processor is specifically configured to: detect an interference value of a candidate frequency resource segment;
  • the candidate frequency resource segment is allocated as the second frequency resource segment to the
  • any one of the at least two candidate frequency resource segments is used as the second frequency resource
  • the segment is allocated to the PRACH channel, or the candidate frequency resource segment with the smallest interference value in the at least two candidate frequency resource segments is allocated as the second frequency resource segment to the PRACH channel, or A candidate frequency resource segment that is closest to the edge frequency band among the at least two candidate frequency resource segments is allocated as the second frequency resource segment to the PRACH channel.
  • the processor is specifically configured to: detect an interference value of a candidate frequency resource segment, and determine, when the difference between the interference value of the first frequency resource segment and the interference value of the candidate frequency resource segment is sufficiently large, determine the first frequency The quality indicators of the resource segment do not meet the quality requirements.
  • the processor is specifically configured to: detect a false alarm probability of the first frequency resource segment, where a difference between an interference value of the first frequency resource segment and an interference value of the candidate frequency resource segment is sufficient When the false alarm probability of the first frequency resource segment is greater than the preset false alarm threshold, it is determined that the quality indicator of the first frequency resource segment does not meet the quality requirement.
  • the processor is specifically configured to: when only one candidate frequency resource segment satisfies that the difference between the interference value of the first frequency resource segment and the interference value of the candidate frequency resource segment is sufficiently large, the candidate frequency resource segment is used as the location
  • the second frequency resource segment is allocated to the PRACH channel; or
  • any one of the at least two candidate frequency resource segments is allocated to the PRACH channel as the second frequency resource segment, or the candidate frequency resource segment with the smallest interference value in the at least two candidate frequency resource segments is allocated as the second frequency resource segment.
  • the candidate frequency resource segment that is closest to the edge frequency band of the at least two candidate frequency resource segments is allocated to the PR ACH channel as the second frequency resource segment.
  • the processor is specifically configured to: detect a false alarm probability of the first frequency resource segment, and determine, when the false alarm probability of the first frequency resource segment is greater than a preset false alarm threshold, determining the first frequency resource segment Quality indicators do not meet quality requirements.
  • the processor is specifically configured to allocate, as the second frequency resource segment, a candidate frequency resource segment that is farthest from the first frequency resource segment to the PRACH channel.
  • the processor is further configured to: determine, in each update period, whether a quality indicator of the first frequency resource segment meets a quality requirement, and if the quality indicator does not meet the quality requirement, re-establish the PRACH channel Allocating a second frequency resource segment;
  • the transmitter is further configured to send the second frequency resource segment to the user equipment in each update period, so that the user equipment performs random access on the second frequency resource segment.
  • a system for allocating a frequency resource segment including any one of the foregoing base stations And user equipment.
  • Method, base station and system for allocating frequency resource segments provided by embodiments of the present invention
  • the second frequency resource segment is re-allocated for the PRACH channel, which improves the access success rate of the user equipment, reduces the access delay, and improves.
  • the coverage of the base station After the cell is established in the prior art, the base station keeps using the previous PRACH channel, so that when the first frequency resource segment is interfered, the user equipment access success rate is low, the access time is extended, and the coverage of the base station is small. .
  • FIG. 1 is a flowchart of a method for allocating a frequency resource segment according to an embodiment of the present invention
  • FIG. 2 is a flowchart of another method for allocating a frequency resource segment according to an embodiment of the present invention
  • FIG. 4 is a flowchart of a method for allocating a frequency resource segment according to an embodiment of the present invention
  • FIG. 4 is a schematic structural diagram of a device for a base station according to an embodiment of the present invention
  • FIG. 6 is a schematic structural diagram of another apparatus of a base station according to an embodiment of the present invention
  • FIG. 7 is a schematic structural diagram of another apparatus of a base station according to an embodiment of the present disclosure
  • FIG. 8 is a system diagram of allocating frequency resource segments according to an embodiment of the present invention.
  • an embodiment of the present invention provides a method for allocating a frequency resource segment for a PRACH channel. Referring to FIG. 1, the method includes:
  • S101 determining whether the quality indicator of the first frequency resource segment currently occupied by the PRACH channel meets the quality requirement
  • the method for allocating frequency resource segments may be applied to a Long Term Evolution (LTE) system.
  • LTE Long Term Evolution
  • the PRACH channel can be configured by the base station, and the base station can send the location of the first frequency resource segment occupied by the PRACH channel to the user equipment, so that the user equipment can perform random access on the PRACH channel.
  • the base station may send the location of the first frequency resource segment to the user equipment by using a system message.
  • the base station may set the frequency offset of the PRACH channel in the system message, and then send the system message by means of broadcast.
  • the user equipment determines the transmission location of the random access preamble according to the frequency offset of the PRACH channel, and initiates a random access procedure.
  • the first frequency resource segment may include six consecutive resource blocks.
  • the quality of the first frequency resource segment is important for the random access of the user equipment, and the quality of the first frequency resource segment may be determined by determining whether the quality indicator of the first frequency resource segment meets the quality requirement.
  • the quality indicators of the first frequency resource segment are various, for example, the interference value, the false alarm probability, and the like.
  • the embodiment of the present invention uses the quality indicator as the interference value or the false alarm probability as an example for description.
  • the embodiment of the present invention may use other quality indicators to determine whether the quality indicator of the first frequency resource segment meets the quality requirement, which is not limited by the embodiment of the present invention.
  • Determining whether the quality indicator of the first frequency resource segment meets the quality requirement may include the following methods:
  • the interference value of the first frequency resource segment is detected. If the interference value of the first frequency resource segment is greater than the preset interference threshold, determining that the quality indicator of the first frequency resource segment does not meet the quality requirement;
  • the interference value of the first frequency resource segment and the false alarm probability of the first frequency resource segment are detected. If the interference value of the first frequency resource segment is greater than the preset interference threshold, or the false alarm probability of the first frequency resource segment is greater than the preset If the false alarm threshold is used, it is determined that the quality indicator of the first frequency resource segment does not meet the quality requirement;
  • the candidate frequency resource segment may be a frequency resource segment other than the first frequency resource segment and the physical uplink control channel (PUCCH) occupied resource block provided by the local base station.
  • PUCCH physical uplink control channel
  • the method includes the following three cases:
  • the interference value of the first frequency resource segment and the interference value of the candidate frequency resource segment are detected. If the difference between the interference value of the first frequency resource segment and the interference value of the candidate frequency resource segment is sufficiently large, determining the first frequency resource segment Quality indicators do not meet quality requirements;
  • the difference between the interference value of the first frequency resource segment and the interference value of the candidate frequency resource segment may be determined to be sufficiently large in various manners.
  • the difference between the interference value of the first frequency resource segment and the interference value of the candidate frequency resource segment may be compared with a preset first threshold, when the interference value of the first frequency resource segment and the interference value of the candidate frequency resource segment When the difference is greater than the first threshold, the difference between the interference value of the first frequency resource segment and the interference value of the candidate frequency resource segment is determined to be sufficiently large; or the difference between the interference value of the first frequency resource segment and the second threshold may be The interference value of the candidate frequency resource segment is compared. When the difference between the interference value of the first frequency resource segment and the interference value of the candidate frequency resource segment is sufficiently large, the interference value of the first frequency resource segment and the interference value of the candidate frequency resource segment are determined. The difference is large enough.
  • the method includes the following three cases:
  • the false alarm probability of the first frequency resource segment is detected. If the false alarm probability of the first frequency resource segment is greater than the preset false alarm threshold, it is determined that the quality indicator of the first frequency resource segment does not meet the quality requirement.
  • the PRACH channel may be re-allocated with a better quality frequency resource segment.
  • the second frequency resource segment may be re-allocated for the PRACH channel in multiple manners.
  • the second frequency resource segment may be re-allocated for the PRACH channel in multiple manners.
  • the second frequency resource segment may be re-allocated for the PRACH channel by the following method:
  • the candidate frequency resource segment is allocated as the second frequency resource segment to the PRACH channel;
  • the interference value of the at least two candidate frequency resource segments is smaller than the interference value of the first frequency resource segment, assigning any one of the at least two candidate frequency resource segments as the second frequency resource segment to the PRACH channel, Or, the candidate frequency resource segment with the smallest interference value in the at least two candidate frequency resource segments is allocated as the second frequency resource segment to the PRACH channel, or the candidate frequency of the at least two candidate frequency resource segments that is closest to the edge frequency band.
  • the resource segment is allocated as a second frequency resource segment to the PRACH channel.
  • the second frequency resource segment may be re-allocated for the PRACH channel by the following method:
  • Rate resource segments are allocated to the PRACH channel;
  • the at least two candidate frequency resource segments are used as the first
  • the second frequency resource segment is allocated to the PRACH channel, or the candidate frequency resource segment with the smallest interference value in the at least two candidate frequency resource segments is allocated as the second frequency resource segment to the PRACH channel, or at least two candidate frequency resource segments are allocated.
  • the candidate frequency resource segment closest to the edge band is allocated to the PRACH channel as the second frequency resource segment.
  • the second frequency resource segment may be re-allocated for the PRACH channel by the following method. :
  • the candidate frequency resource segment farthest from the first frequency resource segment is allocated to the PRACH channel as the second frequency resource segment.
  • S103 Send the second frequency resource segment to the user equipment, so that the user equipment performs random access on the second frequency resource segment.
  • the method may further include:
  • Determining whether the quality indicator of the first frequency resource segment currently occupied by the PRACH channel meets the quality requirement may include: determining, in each update period, whether the quality indicator of the first frequency resource segment meets the quality requirement;
  • the re-allocating the second frequency resource segment for the PRACH channel may include: re-allocating the second frequency resource segment for the PRACH channel if the quality indicator does not meet the quality requirement in each update period;
  • Sending the second frequency resource segment to the user equipment, so that the user equipment performs random access on the second frequency resource segment may include: sending, in each update period, the second frequency resource segment to the user equipment, so that The user equipment performs random access on the second frequency resource segment.
  • the method for allocating a frequency resource segment provided by the embodiment of the present invention, when the quality indicator of the first frequency resource segment currently occupied by the PRACH channel does not meet the quality requirement, reallocating the second frequency resource segment for the PRACH channel, and improving the user equipment
  • the access success rate, the access delay is reduced, and the coverage of the base station is improved. After the cell is established, the base station keeps using the previous PRACH channel, so that when the first frequency resource segment is interfered, the user is caused.
  • the device has a low success rate, extended access, and small coverage of the base station.
  • S201 Detect an interference value of a first frequency resource segment currently occupied by the PRACH channel and an interference value of the candidate frequency resource segment.
  • the interference may be interference from neighboring cells or interference from other standard communication systems.
  • each frequency resource segment may include six consecutive resource blocks.
  • S202 Determine whether the interference value of the candidate frequency resource segment is smaller than a difference between the interference value of the first frequency resource segment and the second threshold.
  • the candidate frequency resource segment may be a frequency resource segment other than the first frequency resource segment and the resource block occupied by the PUCCH provided by the local base station.
  • resource block 1 there are 100 resource blocks available from the base station, which can be respectively recorded as resource block 0, resource block 1, resource block 2 resource block 99, and the first frequency resource segment is a resource block.
  • the candidate frequency resource segment block can be from resource block 5 - resource block 10, and resource block 17 - Selection is made in resource block 94.
  • six consecutive candidate frequency resource segment blocks form one candidate resource segment.
  • step S203 If no, return to step S201;
  • the second threshold may be set according to experience.
  • the interference value of the candidate frequency resource segment is smaller than the difference between the interference value of the first frequency resource segment and the second threshold, indicating that the interference received on the first frequency resource segment is strong interference, and the channel quality is poor, so that the access success rate of the user equipment is Low, and the quality of the candidate frequency resource segment is relatively good. Therefore, re-allocating the second frequency resource segment for the PRACH channel at this time can change the quality of the PRACH channel, thereby improving the access success rate of the user equipment.
  • the second threshold is ldB
  • the detected interference value of the first frequency resource segment is 3 dB.
  • the difference between the interference value of the first frequency resource segment and the second threshold is 2 dB. If detected The interference value of a candidate frequency resource segment is ldB, indicating that the quality of the candidate frequency resource segment is better than the frequency resource segment currently occupied by the PRACH channel, and therefore the second frequency resource segment may be re-allocated for the PRACH channel.
  • the second frequency resource segment can be reassigned to the PRACH channel by the following method:
  • the candidate frequency resource segment is allocated as the second frequency resource segment to the PRACH channel.
  • the interference value of at least two candidate frequency resource segments is smaller than the difference between the interference value of the first frequency resource segment and the second threshold
  • any one of the candidate resource segments can be selected as the second frequency resource segment to be allocated to the PRACH channel, thereby improving the quality of the PRACH channel.
  • the candidate frequency resource segment with the smallest interference value in the at least two candidate frequency resource segments is allocated as the second frequency resource segment to the PRACH channel; for example, the first candidate resource segment, the second candidate resource segment, and the third candidate resource are present. If the segment satisfies the condition, and the interference value of the first candidate resource segment > the interference value of the second candidate resource segment > the interference value of the third candidate resource segment, the third candidate resource segment is allocated as the second frequency resource segment to the PRACH.
  • the channel can improve the quality of the PRACH channel.
  • a candidate frequency resource segment that is closest to the edge frequency band among the at least two candidate frequency resource segments is allocated as a second frequency resource segment to the PRACH channel.
  • the first candidate resource segment, the second candidate resource segment, and the third candidate resource segment all satisfy the condition, and the resource block included in the first candidate resource segment is the resource block 5 - resource block 10, and the second candidate resource segment includes The resource block is resource block 50-resource block 55, and the resource block included in the third candidate resource segment is resource block 94-resource block 99. Since the third candidate resource segment is closest to the edge band, the third candidate resource segment is taken as the first When the two frequency resource segments are allocated to the PRACH channel, the quality of the PRACH channel can be improved, and the resource block utilization rate can be improved.
  • step S202 can be set to other, for example, whether the interference value of the candidate frequency resource segment is greater than the first.
  • S205 Send the second frequency resource segment to the user equipment, so that the user equipment performs random access on the second frequency resource segment.
  • the method for allocating a frequency resource segment provided by the embodiment of the present invention, when the quality indicator of the first frequency resource segment currently occupied by the PRACH channel does not meet the quality requirement, reallocating the second frequency resource segment for the PRACH channel, and improving the user equipment
  • the base station keeps using the previous PRACH channel, so that when the first frequency resource segment is interfered, the user equipment access success rate is low, the access time is extended, and the coverage of the base station is small.
  • S301 Detect an interference value of a first frequency resource segment currently occupied by the PRACH channel.
  • the interference may be interference from a neighboring cell or interference from another standard communication system.
  • each frequency resource segment may include six consecutive resource blocks.
  • S302 Determine whether the interference value of the first frequency resource segment is greater than a preset interference threshold.
  • the preset interference threshold may be preset in a storage unit of the base station according to experience.
  • S305 Determine whether an interference value of the candidate frequency resource segment is smaller than an interference value of the first frequency resource segment.
  • step S306 If no, return to step S304;
  • the candidate frequency resource segment is allocated to the PRACH channel as the second frequency resource segment; or,
  • the interference value of the at least two candidate frequency resource segments is smaller than the interference value of the first frequency resource segment, assigning any one of the at least two candidate frequency resource segments as the second frequency resource segment to the PRACH channel, Or, the candidate frequency resource segment with the smallest interference value in the at least two candidate frequency resource segments is allocated as the second frequency resource segment to the PRACH channel, or the candidate frequency of the at least two candidate frequency resource segments that is closest to the edge frequency band.
  • the resource segment is allocated as a second frequency resource segment to the PRACH channel.
  • step S204 of the first embodiment may also be
  • the PRACH channel reassigns the second frequency resource segment.
  • step S302 and step S305 are identical to step S302 and step S305.
  • S308 Send the second frequency resource segment to the user equipment, so that the user equipment performs random access on the second frequency resource segment.
  • the method for allocating a frequency resource segment provided by the embodiment of the present invention, when the quality indicator of the first frequency resource segment currently occupied by the PRACH channel does not meet the quality requirement, reallocating the second frequency resource segment for the PRACH channel, and improving the user equipment
  • the base station keeps using the previous PRACH channel, so that when the first frequency resource segment is interfered, the user equipment access success rate is low, the access time is extended, and the coverage of the base station is small.
  • each frequency resource segment may include six consecutive resource blocks.
  • S402 Determine whether the false alarm probability of the first frequency resource segment is greater than a preset false alarm threshold.
  • the preset false alarm threshold may be set according to experience.
  • S404 If yes, re-allocating the second frequency resource segment for the PRACH channel; exemplarily, the false alarm probability of the first frequency resource segment is greater than the preset false alarm threshold, indicating that the channel quality of the PRACH channel is poor, affecting user equipment access. Success rate, and increase the burden of the Central Processing Unit (CPU), so it needs to be heavy A new frequency resource segment is allocated for the PRACH channel.
  • CPU Central Processing Unit
  • the candidate frequency resource segment farthest from the first frequency resource segment may be selected as the second frequency resource segment to be allocated to the P R A C H channel.
  • the resource block included in the first frequency resource segment is the resource block 11-resource block 16
  • the frequency resource segment of the resource block 94-resource block 99 may be selected as the second frequency resource segment and allocated to the PRACH channel.
  • S405 Send the second frequency resource segment to the user equipment, so that the user equipment performs random access on the second frequency resource segment.
  • the method for allocating a frequency resource segment provided by the embodiment of the present invention, when the false alarm probability of the first frequency resource segment currently occupied by the PRACH channel is greater than the preset false alarm threshold, reallocating the second frequency resource segment for the PRACH channel,
  • the access rate of the user equipment is reduced, which reduces the CPU usage of the base station.
  • the problem that the access rate of the user equipment is low and the CPU usage of the base station board is high is caused by the fact that the base station always uses the previous PRACH channel after the cell is established.
  • the quality indicator of the first frequency resource segment satisfies the quality requirement according to the interference value and the false alarm probability of the first frequency resource segment, respectively, and meets the preset condition.
  • the second frequency resource segment is reallocated for the PRACH channel, however, the present invention is not limited thereto.
  • the quality of the first frequency resource segment may be comprehensively determined according to the interference condition value and the false alarm probability of the first frequency resource segment, and the quality of the current PRACH channel is satisfied.
  • the second frequency resource segment may be reallocated for the PRACH channel, and the method for allocating the second frequency resource segment may be The method described in any of the above embodiments.
  • an embodiment of the present invention provides a base station 50.
  • the base station 50 can include:
  • the determining unit 501 is configured to determine whether the quality indicator of the first frequency resource segment currently occupied by the PRACH channel meets the quality requirement;
  • the base station 50 provided by the embodiment of the present invention may be applied to a Long Term Evolution (LTE) system.
  • LTE Long Term Evolution
  • the PRACH channel can be configured by the base station 50, and the base station 50 can have the PRACH channel
  • the occupied location of the first frequency resource segment is sent to the user equipment, so that the user equipment can be
  • Random access is performed on the PRACH channel.
  • the base station 50 can send the location of the first frequency resource segment to the user equipment by using a system message.
  • the base station 50 can set the frequency offset of the PRACH channel in the system message, and then broadcast the system.
  • the message is sent to the user device.
  • the user equipment determines the transmission location of the random access preamble according to the frequency offset of the PRACH channel, and initiates a random access procedure.
  • the first frequency resource segment may include six consecutive resource blocks.
  • the quality of the first frequency resource segment is important for the random access of the user equipment, and the quality of the first frequency resource segment may be determined by determining whether the quality indicator of the first frequency resource segment meets the quality requirement.
  • the quality indicators of the first frequency resource segment are various, for example, the interference value, the false alarm probability, and the like.
  • the embodiment of the present invention uses the quality indicator as the interference value or the false alarm probability as an example for description.
  • the embodiment of the present invention may use other quality indicators to determine whether the quality indicator of the first frequency resource segment meets the quality requirement, which is not limited by the embodiment of the present invention.
  • the determining unit 501 may include:
  • the first detecting module 501 1 is configured to detect an interference value of the first frequency resource segment
  • the first determining module 5012 is configured to determine that the quality indicator of the first frequency resource segment does not meet the quality requirement when the interference value of the first frequency resource segment is greater than the preset interference threshold.
  • the determining unit 501 may further include:
  • the second detecting module 5013 is configured to detect an interference value of the first frequency resource segment and a false alarm probability of the first frequency resource segment;
  • the second determining module 5014 is configured to determine, when the interference value of the first frequency resource segment is greater than the preset interference threshold, or the false alarm probability of the first frequency resource segment is greater than the preset false alarm threshold, determine the quality indicator of the first frequency resource segment Does not meet the quality requirements.
  • the candidate frequency resource segment may be a frequency resource segment other than the first frequency resource segment and the physical uplink control channel (PUCCH) occupied resource block provided by the local base station.
  • PUCCH physical uplink control channel
  • the second determining module 50141 may be specifically used,
  • the determining unit 501 may further include:
  • a third detecting module 5015 configured to detect an interference value of the candidate frequency resource segment
  • the third determining module 5016 is configured to determine that the quality indicator of the first frequency resource segment does not meet the quality requirement when the difference between the interference value of the first frequency resource segment and the interference value of the candidate frequency resource segment is sufficiently large.
  • the difference between the interference value of the first frequency resource segment and the interference value of the candidate frequency resource segment may be determined to be sufficiently large, for example, the interference value of the first frequency resource segment may be interfered with the candidate frequency resource segment.
  • the difference between the value and the preset first threshold is compared.
  • the difference between the interference value of the first frequency resource segment and the interference value of the candidate frequency resource segment is greater than the first threshold, determining the interference value of the first frequency resource segment and The difference of the interference value of the candidate frequency resource segment is sufficiently large; or the difference between the interference value of the first frequency resource segment and the second threshold may be compared with the interference value of the candidate frequency resource segment, when the interference value of the first frequency resource segment When the difference between the interference values of the candidate frequency resource segments is sufficiently large, it is determined that the difference between the interference value of the first frequency resource segment and the interference value of the candidate frequency resource segment is sufficiently large.
  • the determining unit 501 may further include:
  • a fourth detecting module 5017 configured to detect a false alarm probability of the first frequency resource segment
  • a fourth determining module 5018 configured to: when the interference value of the first frequency resource segment is different from the interference value of the candidate frequency resource segment, or When the false alarm probability of the first frequency resource segment is greater than the preset false alarm threshold, it is determined that the quality indicator of the first frequency resource segment does not meet the quality requirement.
  • the fourth determining module 5018 may be specifically configured to:
  • the determining unit 501 may further include:
  • the fifth detecting module 5019 is configured to detect a false alarm probability of the first frequency resource segment; the fifth determining module 501 10 is configured to determine the first frequency when the false alarm probability of the first frequency resource segment is greater than a preset false alarm threshold The quality indicators of the resource segment do not meet the quality requirements.
  • the allocating unit 502 is configured to re-allocate the second frequency resource segment for the PRACH channel when the quality indicator does not meet the quality requirement;
  • the PRACH channel may be re-allocated with a better quality frequency resource segment.
  • the second frequency resource segment may be re-allocated for the PRACH channel in multiple manners.
  • the second frequency resource segment may be re-allocated for the PRACH channel in multiple manners.
  • the allocating unit 502 may include:
  • a detection candidate module 5021 configured to detect an interference value of a candidate frequency resource segment
  • the allocation module 5022 is configured to allocate the candidate frequency resource segment as the second frequency resource segment to the PRACH channel if the interference value of only one candidate frequency resource segment is smaller than the interference value of the first frequency resource segment;
  • the interference value of the at least two candidate frequency resource segments is smaller than the interference value of the first frequency resource segment, assigning any one of the at least two candidate frequency resource segments as the second frequency resource segment to the PRACH channel, Or, the candidate frequency resource segment with the smallest interference value in the at least two candidate frequency resource segments is allocated as the second frequency resource segment to the PRACH channel, or the candidate frequency of the at least two candidate frequency resource segments that is closest to the edge frequency band.
  • the resource segment is allocated as a second frequency resource segment to the PRACH channel.
  • the allocating unit 502 may be specifically configured to: if only one candidate frequency resource segment satisfies the interference value and the candidate frequency of the first frequency resource segment If the difference of the interference value of the resource segment is sufficiently large, the candidate frequency resource segment is allocated to the PRACH channel as the second frequency resource segment; or If there are at least two candidate frequency resource segments that satisfy the difference between the interference value of the first frequency resource segment and the interference value of the candidate frequency resource segment, the at least two candidate frequency resource segments are used as the first
  • the second frequency resource segment is allocated to the PRACH channel, or the candidate frequency resource segment with the smallest interference value in the at least two candidate frequency resource segments is allocated as the second frequency resource segment to the PRACH channel, or at least two candidate frequency resource segments are allocated.
  • the candidate frequency resource segment closest to the edge band is allocated to the PRACH channel as the second frequency resource segment.
  • the determining unit 501 includes a second detecting module 5013 and a second determining module 5014, or includes a fourth detecting module 5017 and a fourth determining module 5018, or includes a fifth detecting module 5019 and a fifth determining module 501 10
  • the allocating unit 502 may be specifically configured to allocate, as the second frequency resource segment, the candidate frequency resource segment farthest from the first frequency resource segment to the PRACH channel.
  • the sending unit 503 is configured to send the second frequency resource segment to the user equipment, so that the user equipment performs random access on the second frequency resource segment.
  • the base station 50 may further include:
  • An update period setting unit 504 configured to set an update period, correspondingly,
  • the determining unit 501 is further configured to: determine, in each update period, whether the quality indicator of the first frequency resource segment meets the quality requirement;
  • the allocating unit 502 may be further configured to re-allocate the second frequency resource segment for the PRACH channel if the quality indicator does not meet the quality requirement in each update period;
  • the sending unit 503 is further configured to: send, in each update period, the second frequency resource segment to the user equipment, so that the user equipment performs random access on the second frequency resource segment.
  • the base station that allocates the frequency resource segment provided by the embodiment of the present invention when the quality indicator of the first frequency resource segment currently occupied by the PRACH channel does not meet the quality requirement, the base station re-allocates the second frequency resource segment for the PRACH channel, thereby improving The access success rate of the user equipment, the access delay is reduced, and the coverage of the base station is improved.
  • the base station keeps using the previous PRACH channel, so that when the first frequency resource segment is interfered, the user equipment access success rate is low, the access time is extended, and the coverage of the base station is small. .
  • an embodiment of the present invention provides a base station 50.
  • the base station 50 can include:
  • the processor 701 is configured to determine whether the quality indicator of the first frequency resource segment currently occupied by the PRACH channel meets the quality requirement, and when the quality indicator does not meet the quality requirement, the process is a PRACH letter.
  • the channel reassigns the second frequency resource segment;
  • Example '1' is born
  • the processor 701 may be specifically configured to: detect an interference value of the first frequency resource segment, and determine that the quality indicator of the first frequency resource segment does not meet the quality requirement when the interference value of the first frequency resource segment is greater than the preset interference threshold;
  • the processor 701 is further configured to: detect a false alarm probability of the first frequency resource segment, where the interference value of the first frequency resource segment is greater than a preset interference threshold, or the false alarm probability of the first frequency resource segment is greater than a preset If the false alarm threshold is used, it is determined that the quality indicator of the first frequency resource segment does not meet the quality requirement;
  • the processor 701 is further configured to: detect an interference value of the candidate frequency resource segment, and determine, when the difference between the interference value of the first frequency resource segment and the interference value of the candidate frequency resource segment is sufficiently large, determine the first frequency resource segment. Quality indicators do not meet quality requirements;
  • the processor 701 is further configured to: detect a false alarm probability of the first frequency resource segment, where the difference between the interference value of the first frequency resource segment and the interference value of the candidate frequency resource segment is sufficient, or the first frequency resource When the false alarm probability of the segment is greater than the preset false alarm threshold, it is determined that the quality indicator of the first frequency resource segment does not meet the quality requirement;
  • the processor 701 is further configured to: detect a false alarm probability of the first frequency resource segment, and when the false alarm probability of the first frequency resource segment is greater than a preset false alarm threshold, determine that the quality indicator of the first frequency resource segment is not Meet the quality requirements.
  • the processor 701 may be further configured to: detect an interference value of the 'J candidate frequency resource segment;
  • the candidate frequency resource segment is allocated as the second frequency resource segment to the PR ACH channel, or
  • any one of the at least two candidate frequency resource segments is allocated as the second frequency resource segment to the PRACH channel.
  • the candidate frequency resource segment with the smallest interference value in the at least two candidate frequency resource segments is allocated as the second frequency resource segment to the PRACH channel, or the candidate frequency of the at least two candidate frequency resource segments that is closest to the edge frequency band.
  • the resource segment is allocated as a second frequency resource segment to the PRACH channel.
  • the processor 701 may be further configured to: when only one candidate frequency resource segment satisfies the interference value and the candidate frequency of the first frequency resource segment When the difference of the interference value of the rate resource segment is sufficiently large, the candidate frequency resource segment is allocated as the second frequency resource segment to the PRACH channel;
  • any one of the at least two candidate frequency resource segments is taken as the first
  • the two frequency resource segments are allocated to the PRACH channel, or the candidate frequency resource segments with the smallest interference value in the at least two candidate frequency resource segments are allocated as the second frequency resource segment to the PRACH channel, or at least two candidate frequency resource segments are allocated.
  • the candidate frequency resource segment closest to the edge band is allocated to the PRACH channel as the second frequency resource segment.
  • the processor 701 may be further configured to allocate the candidate frequency resource segment farthest from the first frequency resource segment as the second frequency resource segment to the PRACH channel.
  • the processor 701 is further configured to: determine, in each update period, whether the quality indicator of the first frequency resource segment meets the quality requirement, and if the quality indicator does not meet the quality requirement, re-allocate the second frequency for the PRACH channel. Resource segment.
  • the transmitter 702 is configured to send the second frequency resource segment to the user equipment, so that the user equipment performs random access on the second frequency resource segment.
  • the transmitter 702 is further configured to: send, in each update period, the second frequency resource segment to the user equipment, so that the user equipment performs random access on the second frequency resource segment.
  • the base station that allocates the frequency resource segment provided by the embodiment of the present invention when the quality indicator of the first frequency resource segment currently occupied by the PRACH channel does not meet the quality requirement, the base station re-allocates the second frequency resource segment for the PRACH channel, thereby improving The access success rate of the user equipment, the access delay is reduced, and the coverage of the base station is improved.
  • the base station keeps using the previous PRACH channel, so that when the first frequency resource segment is interfered, the user equipment access success rate is low, the access time is extended, and the coverage of the base station is small.
  • the embodiment of the present invention provides a system for allocating a frequency resource segment.
  • the system may include: the base station 50 of any of the foregoing embodiments, and the user equipment 60.
  • the system for allocating the frequency resource segment may be a Long Term Evolution (LTE) system.
  • LTE Long Term Evolution
  • the system for allocating a frequency resource segment provided by the embodiment of the present invention when the quality indicator of the first frequency resource segment currently occupied by the PRACH channel does not meet the quality requirement, the base station re-allocates the second frequency resource segment for the PRACH channel, thereby improving the user.
  • the access success rate of the device, the access delay is reduced, and the coverage of the base station is improved.
  • the base station keeps using the previous PRACH channel, so that when the first frequency resource segment is interfered, the user equipment access success rate is low, the access time is extended, and the coverage of the base station is small. .

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  • Engineering & Computer Science (AREA)
  • Quality & Reliability (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

Les modes de réalisation de la présente invention s'appliquent au domaine des communications. L'invention concerne un procédé, un dispositif et un système destinés à l'attribution d'une section de ressource de fréquence, qui servent à accroître le taux de réussite d'accès d'un équipement utilisateur, à réduire le temps d'accès et à élargir la couverture d'une station de base. Le procédé conforme aux modes de réalisation de cette invention consiste : à déterminer si un indice de qualité d'une première section de ressource de fréquence qui est occupée à ce moment par un canal PRACH répond à une exigence de qualité; si l'indice de qualité ne répond pas à l'exigence de qualité, à réattribuer une seconde section de ressource de fréquence audit canal PRACH; et à envoyer la seconde section de ressource de fréquence à l'équipement utilisateur, ce qui lui permet de réaliser un accès aléatoire sur cette seconde section de ressource de fréquence.
PCT/CN2012/084646 2012-11-15 2012-11-15 Procédé, dispositif et système destinés à l'attribution d'une section de ressource de fréquence WO2014075253A1 (fr)

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CN201280027566.2A CN103703851B (zh) 2012-11-15 2012-11-15 一种分配频率资源段的方法、设备及系统

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CN101754227A (zh) * 2008-12-08 2010-06-23 华为技术有限公司 中继系统的频率分配方法及装置
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CN101754227A (zh) * 2008-12-08 2010-06-23 华为技术有限公司 中继系统的频率分配方法及装置
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