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Resource allocating method and device of downlink shared channel
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A resource allocation device and resource allocation technology, applied in the direction of network traffic/resource management, wireless communication, electrical components, etc., can solve the problems of system performance impact, inability to guarantee real-time data transmission, inability to guarantee users, etc., to ensure efficient utilization Effect
Active Publication Date: 2015-04-22
DATANG MOBILE COMM EQUIP CO LTD
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[0011] 1. The two processes of selecting the PRB addressing range and allocating PRB resources are relatively independent, without considering the interrelationship between the two. When selecting the PRB addressing range, it is usually considered the whole of all PRBs or all available PRBs in the addressing range Performance, and in many cases, only part of the PRB resources within the addressing range will be allocated to a UE, and the existing methods cannot guarantee that the optimal PRB resources are allocated to the user, which will have a certain impact on system performance;
[0012] 2. When selecting the PRB addressing range, only the number of available PRB resources in the addressing range or the average CQI is used as the selection basis. The former does not consider the channel quality information of the UE and cannot guarantee efficient data transmission, and the latter does not consider each addressing range. The available information of resources within the address range cannot guarantee the real-time transmission of data. Neither of these two methods can effectively guarantee the user's QoS requirements and fully and efficiently utilize the system spectrum resources.
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no. 1 example
[0058] Assuming that the LTE system bandwidth is 5MHz, the PRB resources corresponding to the PDSCH are divided into two resource subsets, and the number of PRBs contained in each resource subset is (0≤pshift (p)(Δ shift (p)≠0), thus obtaining 4 PRB addressing ranges, which are respectively denoted as Ω i (0≤i<4).
[0059] Assume that the amount of data to be transmitted by the currently scheduled UE is Data required , according to Data required And the number of PRBs allocated to the UE for channel information estimation within the full bandwidth of the UE is N PRB，reqiured .
[0060] Next, PRB resource pre-allocation is completed within each PRB addressing range. Specifically, assuming the addressing range Ω i The number of available PRBs in is N PRB，usable，i (0≤iPRB，usable，1 and N PRB，usable，2 greater than N PRB，reqiured , N PRB，usable，3 and N PRB，usable，4 less than N PRB，reqiured .
[0061] for Ω 1 and Ω 2 , select N from all available PRBs in order of CQI ...
no. 2 example
[0067] Assuming that the LTE system bandwidth is 5MHz, the PRB resources corresponding to the PDSCH are divided into two resource subsets, and the number of PRBs contained in each resource subset is (0≤pshift (p)(Δ shift (p)≠0), thus obtaining 4 PRB addressing ranges, which are respectively denoted as Ω i (0≤i<4).
[0068] In addition, it is assumed that the amount of data to be transmitted by the currently scheduled UE is Data required , according to Data required And the number of PRBs allocated to the UE for channel information estimation within the full bandwidth of the UE is N PRB，reqiured .
[0069] Next, PRB resource pre-allocation is completed within each PRB addressing range. Suppose the addressing range Ω i The number of available PRBs in is N PRB，usable，i , and N PRB，usable，i ≤N PRB，reqiured (0≤ii (0≤itransfer，i (0≤i<4).
[0070] Then, according to the comparison result of the amount of data to be transmitted by the current UE and the amount of data that ...
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Abstract
The invention discloses a resource allocating method and of a downlink shared channel. The resource allocating method comprises the steps of: 102, determining all possible PRB (Packet Receive Buffers) addressing ranges according to band width configuration of a system; 104, pre-allocating the PRB in each PRB addressing range according to the data quantity to be transmitted of current UE (User Equipment) and the channel information of the current UE so as to determine the pre-allocated PRB and the data quantity capable of being loaded by the pre-allocated PRB; and 106, determining a priority level of each PRB addressing range according to the pre-allocation processing result and the data quantity to be transmitted and determining the PRB addressing range having the highest priority level as the PRB addressing range to be allocated to the current UE so as to determine the PRB to be allocated to the current UE. According to the technical scheme in the invention, optimum PRB resources can be allocated to the UE on the premise that the QoS (Quality of Service) of the UE is guaranteed, such that the frequency spectrum resource of the system can be utilized effectively.
Description
technical field [0001] The present invention relates to the communication field, in particular to a resource allocation method and device for a downlink shared channel. Background technique [0002] The LTE (Long Term Evolution, Long Term Evolution) system is a mixed service system that mainly focuses on data services and coexists with multiple services. The maximum system bandwidth that the LTE system can support is 20MHz. In order to better support the broadband system, the downlink of the LTE system uses OFDMA (Orthogonal Frequency Division Multiple Access) to divide the entire broadband frequency selective channel into multiple flat sub-channels, and each sub-channel is orthogonal to each other. In the case of coexistence of multiple user services, time-frequency resources can be flexibly allocated for data transmission according to different QoS requirements of various services and user channel conditions. [0003] In order to better meet the QoS (Quality of Service) ...
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