WO2014075253A1

WO2014075253A1 - Method, device and system for allocating frequency resource section

Info

Publication number: WO2014075253A1
Application number: PCT/CN2012/084646
Authority: WO
Inventors: 马守贵; 朱希云; 胡宁
Original assignee: 华为技术有限公司
Priority date: 2012-11-15
Filing date: 2012-11-15
Publication date: 2014-05-22
Also published as: CN103703851B; CN103703851A

Abstract

Embodiments of the present invention relate to the communications field. Disclosed is a method, a device and a system for allocating a frequency resource section, used for increasing an access success rate of a user equipment, reducing an access delay and increase coverage of a base station. The method provided by the embodiments of the present invention comprises: determining whether a quality index of a first frequency resource section that is currently occupied by a PRACH channel meets a quality requirement; if the quality index does not meet the quality requirement, re-allocating a second frequency resource section to the PRACH channel; and sending the second frequency resource section to the user equipment, enabling the user equipment to implement random access on the second frequency resource section.

Description

The present invention relates to the field of communications, and in particular, to a method, device, and system for allocating frequency resource segments.

Background technique

The process of random access of the user equipment (User Equipment, UE for short) 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.

According to the 3GPP TS36.331 protocol, 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.

In the prior art, after the cell is established, the base station always uses the previous PRACH channel. When 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.

Summary of the invention

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. In order to achieve the above object, the embodiment of the present invention adopts the following technical solutions:

In a first aspect, a method for allocating a frequency resource segment is provided, including:

Determining whether the quality indicator of the first frequency resource segment currently occupied by the PRACH channel meets the quality requirement;

And if the quality indicator does not meet the quality requirement, re-allocating the second frequency resource segment for the PRACH channel;

Transmitting the second frequency resource segment to the user equipment, so that the user equipment performs random access on the second frequency resource segment.

In a first possible implementation manner, according to the first aspect, 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:

Detecting an interference value of the first frequency resource segment;

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.

In a second possible implementation manner, according to the first aspect, 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 a false alarm probability of the first frequency resource segment;

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 false alarm threshold, determining the quality indicator of the first frequency resource segment Does not meet the quality requirements.

In a third possible implementation manner, in combination with the first possible implementation manner or the second possible implementation manner, the re-allocating the second frequency resource segment for the PRACH channel is implemented as follows:

Check the interference value of the 'J candidate frequency resource segment;

If 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 is allocated to the PRACH channel as the second frequency resource segment;

Or,

If the interference value of the at least two candidate frequency resource segments is smaller than the interference value of the first 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.

In a fourth possible implementation manner, according to the first aspect, 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.

In a fifth possible implementation manner, according to the first aspect, 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, an interference value of the candidate frequency resource segment, and a false alarm probability of the first 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, or the false alarm probability of the first frequency resource segment is greater than the preset false alarm threshold, The quality indicator of the first frequency resource segment does not meet the quality requirement.

In a sixth possible implementation, in combination with the fourth possible implementation manner or the fifth possible implementation manner, the re-allocating the second frequency resource segment for the PRACH channel is implemented as follows:

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, the candidate frequency resource segment is allocated to the second frequency resource segment as the second frequency resource segment. Said PRACH channel;

Or,

If there is at least two candidate frequency resource segments, 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, then 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.

In a seventh possible implementation, according to the first aspect, 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 a false alarm probability of the first frequency resource segment;

If the false alarm probability of the first frequency resource segment is greater than the preset false alarm threshold, determining that the quality indicator of the first frequency resource segment does not meet the quality requirement. In an eighth possible implementation manner, in combination with the second possible implementation manner, the third possible implementation manner, or the fifth possible implementation manner, the re-allocating the second frequency for the PRACH channel The resource segment 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.

In a ninth possible implementation manner, according to the first aspect or the first possible implementation manner to the eighth possible implementation manner, 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;

Transmitting the second frequency resource segment to the user equipment, so that the user equipment performs random access on the second frequency resource segment, including: performing, in each update period, the second frequency The resource segment is sent to the user equipment, so that the user equipment performs random access on the second frequency resource segment.

In a second aspect, a base station for allocating a frequency resource segment is provided, 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,

Reconfiguring the second frequency resource segment by the PRACH channel;

And 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.

In a first possible implementation, according to the second aspect, 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.

In a second possible implementation, 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.

In a third possible implementation manner, in combination with the first possible implementation manner or the second possible implementation manner, 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;

Or,

When the interference value of the at least two candidate frequency resource segments is smaller than the interference value of the first 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.

In a fourth possible implementation, according to the second aspect, 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.

In a fifth possible implementation, according to the second aspect, 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.

In a sixth possible implementation manner, in combination with the fourth possible implementation manner or the fifth possible implementation manner,

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

When there is at least two candidate frequency resource segments, 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, 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.

In a seventh possible implementation, according to the second aspect, 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.

In an eighth possible implementation manner, combining the second possible implementation manner, the fifth possible implementation manner, or the seventh possible implementation manner,

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.

In a ninth possible implementation manner, in combination with the second aspect, the first possible implementation manner, and the eighth possible implementation manner, the base station further includes:

An update cycle setting unit for setting an update cycle; correspondingly,

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.

In a third aspect, a base station for allocating a frequency resource segment is provided, 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; And 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.

In a first possible implementation manner, according to the third aspect,

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.

In a second possible implementation manner, according to the third aspect,

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.

In a third possible implementation manner, combining the first possible implementation manner or the second possible implementation manner,

The processor is specifically configured to: detect an interference value of a candidate frequency resource segment;

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 is allocated as the second frequency resource segment to the

PRACH channel,

Or,

In a fourth possible implementation manner, according to the third aspect,

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.

In a fifth possible implementation manner, according to the third aspect,

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

And when at least two candidate frequency resource segments satisfy a difference that the interference value of the first frequency resource segment and the interference value of the candidate frequency resource segment are sufficiently large, any one of the at least two candidate frequency resource segments The candidate 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. 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 PR ACH channel as the second frequency resource segment.

In a seventh possible implementation manner, according to the third aspect,

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.

In a ninth possible implementation, in combination with the third aspect, the first possible implementation manner, or the eighth possible implementation manner,

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.

In a fourth aspect, a system for allocating a frequency resource segment is provided, 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

When the quality indicator of the first frequency resource segment currently occupied by the PRACH channel does not meet the quality requirement, 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. .

DRAWINGS

BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are set forth in the description of the claims Other drawings can also be obtained from these drawings on the premise of creative labor. 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.

The technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. example. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention. In one aspect, 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;

For example, the method for allocating frequency resource segments provided by the embodiments of the present invention may be applied to a Long Term Evolution (LTE) system.

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. Specifically, the base station may send the location of the first frequency resource segment to the user equipment by using a system message. For example, 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. Give 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.

Optionally, the first frequency resource segment may include six consecutive resource blocks.

Exemplarily, 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. Certainly, 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:

1. 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;

2. 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;

For example, 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. Exemplarily, the method includes the following three cases:

1) When the interference value of the first frequency resource segment is greater than the interference value of the candidate frequency resource segment, and the false alarm probability of the first frequency resource segment is less than the preset false alarm threshold, determining that the quality indicator of the first frequency resource segment does not satisfy the quality Claim;

2) When the interference value of the first frequency resource segment is smaller than the interference value of the candidate frequency resource segment, and the false alarm probability of the first frequency resource segment is greater than the preset false alarm threshold, determining that the quality indicator of the first frequency resource segment does not satisfy the quality Claim;

3) When the interference value of the first frequency resource segment is greater than the interference value of the candidate frequency resource segment, and the false alarm probability of the first frequency resource segment is greater than the preset false alarm threshold, determining that the quality indicator of the first frequency resource segment does not satisfy the quality Claim.

3. 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;

Exemplarily, 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. For example, 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.

4. Detecting the interference value of the first frequency resource segment, the interference value of the candidate frequency resource segment, and the false alarm probability of the first 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 sufficient 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;

Exemplarily, the method includes the following three cases:

1) determining the quality of the first frequency resource segment 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, and the false alarm probability of the first frequency resource segment is less than the preset false alarm threshold The indicator does not meet the quality requirements;

2) When the difference between the interference value of the first frequency resource segment and the interference value of the candidate frequency resource segment is not sufficiently large, and the false alarm probability of the first frequency resource segment is greater than the preset false alarm threshold, The quality index of a frequency resource segment does not meet the quality requirements;

3) determining the quality of the first frequency resource segment 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, and the false alarm probability of the first frequency resource segment is greater than the preset false alarm threshold The indicator does not meet the quality requirements.

5. 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.

S102: if the quality indicator does not meet the quality requirement, reallocating the second frequency resource segment for the PRACH channel;

For example, when the quality indicator of the first frequency resource segment does not meet the quality requirement, in order to ensure the access success rate of the user equipment, the PRACH channel may be re-allocated with a better quality frequency resource segment.

Optionally, the second frequency resource segment may be re-allocated for the PRACH channel in multiple manners. Preferably,

In the first manner, when the first or second method is used to determine that the quality indicator of the first frequency resource segment does not meet the quality requirement, the second frequency resource segment may be re-allocated for the PRACH channel by the following method:

Check the interference value of the 'J candidate frequency resource segment;

If 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 is allocated as the second frequency resource segment to the PRACH channel; or

If 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.

In the second mode, when the third or fourth method is used to determine that the quality indicator of the first frequency resource segment does not meet the quality requirement, the second frequency resource segment may be re-allocated for the PRACH channel by the following method:

If only one candidate frequency resource segment satisfies the difference between the interference value of the first frequency resource segment and the interference value of the candidate frequency resource segment, the candidate frequency resource segment is used as the second frequency. Rate resource segments are allocated to the PRACH channel;

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.

In the third mode, when the quality criterion of the first frequency resource segment does not meet the quality requirement by using the foregoing second, fourth, or fifth method, 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.

Further, the method may further include:

Set the update cycle, correspondingly,

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;

If the quality indicator does not meet 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. The above method will be described below through three specific embodiments, and the three embodiments are all methods for allocating frequency resource segments in one update period.

Embodiment 1

See Figure 2, including:

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.

Illustratively, the interference may be interference from neighboring cells or interference from other standard communication systems.

Optionally, 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.

Exemplarily, 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.

For example, it is assumed that 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.

11 - resource block 16, the resource block occupied by the PUCCH channel is resource block 0 - resource block 4, and resource block 95 - resource fast 99, then 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. Optionally, six consecutive candidate frequency resource segment blocks form one candidate resource segment.

S203: If no, return to step S201;

S204: If yes, reallocating the second frequency resource segment for the PRACH channel; exemplarily, 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.

For example, the second threshold is ldB, and the detected interference value of the first frequency resource segment is 3 dB. Then, 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.

Exemplarily, the second frequency resource segment can be reassigned to the PRACH channel by the following method:

If the interference value of only one candidate frequency resource segment is smaller than the difference between the interference value of the first frequency resource segment and the second threshold, the candidate frequency resource segment is allocated as the second frequency resource segment to the PRACH channel.

If 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,

</ RTI> </ RTI> </ RTI> </ RTI> </ RTI> </ RTI> </ RTI> </ RTI> </ RTI> </ RTI> </ RTI> </ RTI> </ RTI> </ RTI> </ RTI> </ RTI> </ RTI> </ RTI> If the segments satisfy the condition, 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.

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; 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.

Alternatively, 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. For example, 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.

Further, those skilled in the art should understand that the determination condition in step S202 can be set to other, for example, whether the interference value of the candidate frequency resource segment is greater than the first. The difference between the interference value of the frequency resource segment and the second threshold value, etc., correspondingly, other steps need to be changed accordingly, and each method is not performed here - enumeration.

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 access success rate, the access delay is reduced, and the coverage of the base station is improved. 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. .

Embodiment 2

See Figure 3, including:

S301: Detect an interference value of a first frequency resource segment currently occupied by the PRACH channel. Typically, the interference may be interference from a neighboring cell or interference from another standard communication system.

S302: Determine whether the interference value of the first frequency resource segment is greater than a preset interference threshold. For example, the preset interference threshold may be preset in a storage unit of the base station according to experience.

S303: If no, the process ends;

S304: If yes, detecting an interference value of the candidate frequency resource segment;

S305: Determine whether an interference value of the candidate frequency resource segment is smaller than an interference value of the first frequency resource segment.

S306: If no, return to step S304;

S307: If yes, reallocating the second frequency resource segment for the PRACH channel; for example, the second frequency resource segment may be re-allocated for the PRACH channel by the following method:

If 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 is allocated to the PRACH channel as the second frequency resource segment; or,

Further, the method in step S204 of the first embodiment may also be

The PRACH channel reassigns the second frequency resource segment.

Further, those skilled in the art should understand that in 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 access success rate, the access delay is reduced, and the coverage of the base station is improved. 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. .

Embodiment 3

See Figure 4, including:

S401: Detecting a false alarm probability of the first frequency resource segment currently occupied by the PRACH channel. Optionally, 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. For example, the preset false alarm threshold may be set according to experience.

S403: If no, the process ends;

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.

Preferably, in order to avoid resource blocks with high false alarm probability, 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. For example, if 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.

It should be understood by those skilled in the art that, in the foregoing various embodiments, whether 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. In some other embodiments of the present invention, 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. In this case, as long as one of the interference value and the false alarm probability of the first frequency resource segment satisfies a preset condition, 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.

In one aspect, an embodiment of the present invention provides a base station 50. Referring to FIG. 5, 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;

For example, the base station 50 provided by the embodiment of the present invention may be applied to a Long Term Evolution (LTE) system.

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. Specifically, the base station 50 can send the location of the first frequency resource segment to the user equipment by using a system message. For example, 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.

For example, referring to FIG. 6, 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.

For example, 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.

Exemplarily, the second determining module 50141 may be specifically used,

2) when the interference value of the first frequency resource segment is smaller than the interference value of the candidate frequency resource segment, and When the false alarm probability of a 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 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.

For example, 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. When 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.

Exemplarily, the fourth determining module 5018 may be specifically configured to:

2) When the difference between the interference value of the first frequency resource segment and the interference value of the candidate frequency resource segment is not sufficiently large, and the false alarm probability of the first frequency resource segment is greater than the preset false alarm threshold, determining the first frequency resource segment Quality indicators do not meet quality requirements;

3) When the difference between the interference value of the first frequency resource segment and the interference value of the candidate frequency resource segment is sufficient 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 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;

In the first mode, when the determining unit 501 includes the first detecting module 501 1 and the first determining module 5012, or the determining unit 501 includes the second detecting module 5013 and the second determining module 5014, 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;

Or,

In the second mode, when the determining unit 501 includes the third detecting module 5015 and the third determining module 5016, 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.

In a third mode, 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.

Further, referring to FIG. 6, 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. 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. .

In one aspect, an embodiment of the present invention provides a base station 50. Referring to FIG. 7, 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;

2) 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.

For any one of the above 1) or 2), the processor 701 may be further configured to: detect an interference value of the 'J candidate frequency resource segment;

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 is allocated as the second frequency resource segment to the PR ACH channel, or

When the interference value of the at least two candidate frequency resource segments is smaller than the interference value of the first frequency resource segment, any one of the at least two candidate frequency resource segments is allocated 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.

For any one of the above 3) or 4), 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;

Or,

When 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 is sufficiently large, 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.

For any one of the above 2), 4) or 5), 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.

Further, 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.

Further, 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. 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. .

In one aspect, the embodiment of the present invention provides a system for allocating a frequency resource segment. Referring to FIG. 8, the system may include: the base station 50 of any of the foregoing embodiments, and the user equipment 60.

Optionally, the system for allocating the frequency resource segment may be a Long Term Evolution (LTE) system. 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. 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. .

A person skilled in the art can understand that all or part of the steps of implementing the above method embodiments may be completed by using hardware related to program instructions, and the foregoing program may be stored in a computer readable storage medium, and the program is executed when executed. The foregoing steps include the steps of the foregoing method embodiments; and the foregoing storage medium includes: a medium that can store program codes, such as a ROM, a RAM, a magnetic disk, or an optical disk.

The above is only the specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of changes or substitutions within the technical scope of the present invention. It should be covered by the scope of the present invention. Therefore, the scope of the invention should be determined by the scope of the appended claims.

Claims

Claim

A method for allocating a frequency resource segment, comprising:

The method according to claim 1, wherein the determining whether the quality indicator of the first frequency resource segment currently occupied by the PRACH channel meets the quality requirement comprises: detecting an interference value of the first frequency resource segment;

The method according to claim 1, wherein the determining whether the quality indicator of the first frequency resource segment currently occupied by the PRACH channel meets the quality requirement comprises: detecting an interference value of the first frequency resource segment and The false alarm probability of the first frequency resource segment;

The method according to claim 2 or 3, wherein the reallocating the second frequency resource segment for the PRACH channel comprises:

Check the interference value of the 'J candidate frequency resource segment;

Or,

If the interference value of the at least two candidate frequency resource segments is smaller than the interference value of the first 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 At least two candidate frequencies A candidate frequency resource segment that is closest to the edge band in the source segment is allocated to the PRACH channel as the second frequency resource segment.

The method according to claim 1, wherein the determining whether the quality indicator of the first frequency resource segment currently occupied by the PRACH channel meets the quality requirement comprises: detecting an interference value of the first frequency resource segment and The 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 that the quality indicator of the first frequency resource segment does not meet the quality requirement .

The method according to claim 1, wherein the determining whether the quality indicator of the first frequency resource segment currently occupied by the PRACH channel meets the quality requirement includes: detecting an interference value of the first frequency resource segment, An interference value of the candidate frequency resource segment and a false alarm probability of the first frequency resource segment;

The method according to claim 5 or 6, wherein the reallocating the second frequency resource segment for the PRACH channel comprises:

If only one candidate frequency resource segment satisfies the difference between the interference value of the first frequency resource segment and the interference value of the candidate frequency resource segment, the candidate frequency resource segment is allocated as the second frequency resource segment to The PRACH channel;

Or,

The method according to claim 1, wherein the determining whether the quality indicator of the first frequency resource segment currently occupied by the PRACH channel meets the quality requirement comprises: detecting a false alarm probability of the first frequency resource segment ;

If the false alarm probability of the first frequency resource segment is greater than the preset false alarm threshold, determining that the quality indicator of the first frequency resource segment does not meet the quality requirement.

The method according to any one of claims 3, 6 or 8, wherein the reallocating the second frequency resource segment for the PRACH channel comprises:

The method according to any one of claims 1 to 9, wherein the method further comprises: setting an update period, correspondingly,

A base station for allocating a frequency resource segment, comprising:

An allocating unit, configured to re-allocate the second frequency resource segment for the PRACH channel when the quality indicator does not meet the quality requirement;

The base station according to claim 11, wherein the determining unit comprises: a first detecting module, configured to detect an interference value of the first frequency resource segment;

The base station according to claim 11, wherein the determining unit comprises: a second detecting module, configured to detect an interference value of the first frequency resource segment and a false alarm of the first frequency resource segment Probability

a second determining module, configured to: when the interference value of the first frequency resource segment is greater than a preset interference The threshold, or the false alarm probability of the first frequency resource segment is greater than the preset false alarm threshold, determining that the quality indicator of the first frequency resource segment does not meet the quality requirement.

The base station according to claim 12 or 13, wherein the allocation unit comprises:

Or,

The base station according to claim 11, wherein the determining unit comprises: a third detecting module, configured to detect an interference value of a candidate frequency resource segment;

The base station according to claim 11, wherein the determining unit comprises: 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.

17. A base station according to claim 15 or 16, characterized in that

The allocating unit is configured to: when only one candidate frequency resource segment has a 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 a second frequency resource segment is allocated to the PRACH channel;

or, When there is at least two candidate frequency resource segments, 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, any one of the at least two candidate frequency resource segments is selected a frequency resource segment is allocated as the second frequency resource segment to the

a PRACH channel, or a candidate frequency resource segment that minimizes an interference value in the at least two candidate frequency resource segments as the second frequency resource segment is allocated to the PRACH channel, or the at least two candidate frequencies are A candidate frequency resource segment that is closest to the edge band in the resource segment is allocated to the PRACH channel as the second frequency resource segment.

The base station according to claim 11, wherein the determining unit comprises: 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 base station according to any one of claims 13, 16 or 18, wherein the allocating unit is configured to: use a candidate frequency resource segment farthest from the first frequency resource segment as the first A two frequency resource segment is allocated to the PRACH channel.

The base station according to any one of claims 11 to 19, wherein the base station further comprises:

An update cycle setting unit for setting an update cycle; correspondingly,

The allocating unit is 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 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 base station for allocating a frequency resource segment, comprising:

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;

And 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.

22. The base station according to claim 21, wherein

The processor is specifically configured to: detect an interference value of the first frequency resource segment, when When 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.

23. The base station according to claim 21, wherein

24. A base station according to claim 22 or 23, characterized in that

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 is allocated to the PRACH channel as the second frequency resource segment.

Or,

25. The base station according to claim 21, wherein

26. The base station according to claim 21, wherein

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 sufficiently large, 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.

27. A base station according to claim 25 or 26, characterized in that

The processor is specifically configured to: when there is only one candidate frequency resource segment, 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 selected frequency resource segment is allocated to the PRACH channel as the second frequency resource segment; or

28. The base station according to claim 21, wherein

The base station according to any one of claims 23, 26 or 28, wherein the processor is specifically configured to: use a candidate frequency resource segment that is farthest from the first frequency resource segment as the first A two frequency resource segment is allocated to the PRACH channel.

30. The base station according to any one of claims 21-29, characterized in that

A system for allocating a frequency resource segment, comprising the base station and the user equipment according to any one of claims 1 to 30.