A method for allocating downlink RB resources in an LTE system based on round robin scheduling

Abstract

The invention discloses an LTE (long term evolution) system downlink RB (resource block) resource assignment method based on polling scheduling. The method includes combining Type0 mode and Type1 mode, selecting a UE (user equipment) assigned a RB from a UE array according to system bandwidth and numbers of required RBs by each UE in the UE array, primarily determining the RB number assigned to each UE, determining the UE arrays (array0 and array1) assigned by the Type0 mode and the Type1 mode, finally determining the RB number and frequency domain position of each UE assigned to the array0 according to the a narrow-band CQI (channel quality indication) corresponding to the UE in the array0, and finally determining the RB number and frequency domain position of each UE assigned to the array1 according to the required RBs by the UEs in the array1 and the number of the rest UEs without assigned RBs. The Type0 mode and the Type1 mode are combined, the RB assignment is performed in two steps, so that frequency selectivity is effectively utilized, system throughput is increased, RB voids are decreased, and waste on resource is reduced.

Description

technical field [0001] The present invention relates to a wireless communication system. The implementation method of the present invention is aimed at a method for allocating downlink resource blocks (ResourceBlock, RB) in the third-generation mobile communication long-term evolution system (hereinafter referred to as 3GLTE), especially a method based on round-robin scheduling A method for allocating downlink RB resources in an LTE system. Background technique [0002] In the LTE system communication system, downlink RBs can be allocated in three ways: type0, type1, and type2. Referring to the description of RB allocation in the international standard protocol 3GPP36.213 of 3GPP LTE, the allocation methods of type0 and type1 will be described below. [0003] In RB allocation type0, RB allocation information is represented by a bitmap bitmap indicating the resource block group (ResourceBlockGroup, RBG) allocated to the scheduled UE, and the length is equal to the number of ...

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Problems solved by technology

However, there are also their own limitations: the Type0 method uses RBG as the smallest unit to allocate resources, which will cause RB waste. The scope of Type1 resource allocation is a subset of RBGs, which cannot represent the RBs of the entire system bandwidth.

[0012] In the existing RB resource allocation methods, Type0 or Type1 is generally used alone for RB allocation, which makes full use of the advantages of Type0 and Type1, but inevitably has its corresponding disadvantages

At the same time, the existing RB resource allocation method usually directly allocates RBs according to UE queues. While determining the number of RBs, the frequency domain position of RBs is also determined. This distributed allocation method does not provide flexible and effective resources. Centralized allocation may result in serious waste or ineffective use of frequency selectivity

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