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A method and device for allocating PRB resources in a carrier

A technology of resource allocation and carrier, applied in the field of data communication, which can solve the problems of idle channel, low data transmission bandwidth, interference, etc.

Active Publication Date: 2020-08-11
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] 1. The bandwidth for sending data is too small, resulting in the average signal energy in the entire carrier being lower than the predetermined CCA energy detection threshold, so that other devices will find that the carrier is idle during CCA detection, and thus use the carrier, so that the two Devices using unlicensed carriers at the same time will cause mutual interference
[0014] 2. The bandwidth of the device sending data is concentrated in a certain part of the carrier frequency domain, especially at both ends of the frequency domain. In this way, when other devices perform CCA detection of unlicensed carriers, if only part of the bandwidth is detected, for example, if the device is not occupied 10MHz bandwidth for sending data, then obviously, the other devices will find that the channel is idle, so if the occupying device uses the next subframe and uses the 10MHz that has not sent data before, interference will occur
[0015] Obviously, the random access PRB in the existing LTE system does not meet the requirements of the above-mentioned unlicensed carrier, so to deploy the LTE system on the unlicensed carrier, it needs to be redesigned to meet the regulatory requirements

Method used

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  • A method and device for allocating PRB resources in a carrier
  • A method and device for allocating PRB resources in a carrier
  • A method and device for allocating PRB resources in a carrier

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0242] When 6 groups of PRB resources for random access are allocated in a subframe, and each group uses 6 PRB pairs, then 36 PRB pairs are required, and the PRB resources are allocated in the following manner.

[0243] The allocation of 36 PRB pairs is performed using the following equation:

[0244]

[0245] in,

[0246] is the total number of uplink PRB pair resources.

[0247] The value range is It is the number of the PRB pair in the frequency domain in the system bandwidth, which may be notified by high-level signaling or through DCI.

[0248] K is a cluster of adjacent clusters (cluster numbers are both odd or even, if the interval between two clusters with an even cluster number and an odd cluster number can be K or not K) between PRB pairs at the same position The interval, calculated by PRB pair, can be obtained according to the power spectral density of the signal in the carrier (for example, assuming that the entire bandwidth and the PRB pair numbers in ...

Embodiment 2

[0260] Increase the number of PRB pairs for each group of random access in the subframe, for example, increase from the original 6 to 10. In this way, the random access resources can be better dispersed in the frequency domain, and better meet the 80% bandwidth occupied by the equipment sending signals.

[0261] At this time, the above-mentioned idea of ​​PRB resource allocation is still used, but some improvements are needed. At this time, the K value needs to be adjusted to a value range, for example, the value of K is about 10, for example, 10. At this time, when 10 clusters need to be allocated, f RA The value is 0~9, which is the serial number of the cluster.

[0262]

[0263]Example 1, assuming that the system bandwidth is 20MHz, when calculating the PRB allocation, it corresponds to 100 PRB pairs (the actual 20MHz system has 110 PRBs, numbered from 0 to 109), numbered from 0 to 99, and the following PRB pair resources can be obtained . The value of K is 10 (11 an...

Embodiment 3

[0275] The subcarrier spacing when the existing random access sequence is sent is modified, for example, from the existing 1.25KHz to 2.5KHz, and then 12 PRB pairs are determined for each group of random access.

[0276] The allocation of candidate PRB pairs still follows the above implementation 2, that is, 72 PRB pairs are generated for random access. It needs to be divided into 12 clusters to generate, and then a PRB pair is selected from each cluster to form 12 PRB pairs for random access.

[0277] At this time, the K value needs to be adjusted in a value range, for example, the value of K is about 8, for example, 8. At this time, when 12 clusters need to be allocated, f RA The value is 0 to 11, which is the serial number of the cluster.

[0278]

[0279] Example 1, assuming that the system bandwidth is 20MHz, when calculating the PRB allocation, it corresponds to 100 PRB pairs (the actual 20MHz system has 110 PRBs, numbered from 0 to 109), numbered from 0 to 99, and ...

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Abstract

The present invention discloses a method and device for allocating PRB resources in a carrier. The method includes: dividing PRB resources into multiple clusters according to a predetermined clustering method; wherein, the number of PRB pairs contained in each cluster is the same; One or more PRB pairs are selected in a cluster as PRB pair resources for sending data. Through the scheme of the present invention, a resource allocation method is provided, which can support the mapping of existing random access sequences in the LTE system, and improves the existing resource allocation, so as to obtain discrete resources in the frequency domain, thereby satisfying regional control Requirements, discrete resource allocation can be realized, which is suitable for unlicensed carriers, so that the allocated resources of the device and the signal energy on it occupy the entire bandwidth and energy requirements.

Description

technical field [0001] The invention relates to the field of data communication, in particular to a method and device for allocating PRB resources in a carrier. Background technique [0002] At present, the long-term evolution technology (LTE) communication network is deployed and operated in the licensed carrier. With the development of LTE, some companies have proposed "suggesting to study the topic of LTE deployed in the unlicensed carrier", such as Qualcomm in the United States It is considered that with the rapid growth of data services, authorized carriers will not be able to bear the huge data volume brought by the rapid service growth in the near future. Consider deploying LTE in unlicensed carriers to share the data traffic in licensed carriers, which can solve the pressure on data volume brought about by business growth. At the same time, unlicensed carriers have the following characteristics: on the one hand, because unlicensed carriers do not need to be purchase...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W72/04H04W74/08
CPCH04W72/0453H04W74/0833H04W72/53H04W72/04
Inventor 苟伟彭佛才李新彩杨玲
Owner ZTE CORP
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