Dynamic resource block distributing method in long term evolution system

A technology of dynamic resource allocation and long-term evolution, applied in electrical components, wireless communication, network planning, etc. environment and other issues, to achieve the effect of good adaptation to the environment, low transmission power, and fairness.

Active Publication Date: 2012-05-09
CHINA INFOMRAITON CONSULTING & DESIGNING INST CO LTD
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Problems solved by technology

[0004] Of course, the increase in granularity will sacrifice part of the performance of the system, because the diversity characteristics of the channel cannot be fully utilized. Considering the diversity of wireless channels, this single fixed resource block allocation scheme cannot be well adapted to various environments.
The main manifestations are: on the one hand, the performance loss of the system is too much in a relatively harsh environment. Taking

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  • Dynamic resource block distributing method in long term evolution system
  • Dynamic resource block distributing method in long term evolution system
  • Dynamic resource block distributing method in long term evolution system

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Embodiment Construction

[0022] The structure of the OFDM system considered in the present invention is as follows figure 1 , assuming that there are M users and N subcarriers, according to the current LTE-A standard, the resource block RB size is the time domain , frequency domain , the subcarrier spacing is 15kHz. Since all subcarriers are orthogonal, each subcarrier is only allowed to be used by one user, so there will be no interference between users.

[0023] In the initial stage, the base station first completes channel estimation, estimates the current channel quality, and mainly calculates the Doppler frequency shift and multiple delay extensions Two parameters, select the corresponding RB size; then carry out carrier, bit, and power allocation, and notify each user through signaling.

[0024] After entering the normal communication stage, the base station monitors the channel changes of each user in real time, if found or If the threshold of the RB size is triggered, an adjustmen...

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Abstract

The invention provides a dynamic resource distributing method used in an LTE-A (Long Term Evolution Advanced) system on the basis of resource blocks. In the dynamic resource distributing method, the sizes of time domains and frequency domains of the resource blocks are regulated in real time according to two parameters, i.e. a Doppler frequency shift and a multipath delay spread, of a channel; in the process of processing the resource blocks, each resource block is abstracted into one point, all subcarriers are equally treated inside the point, powers and bits are equally distributed, and a gain of the block is represented by an average value of gains of all carriers; and in the process of distributing the resource blocks, firstly, the best blocks are distributed for all users by using a greedy algorithm, and then a priority is established for each user for the blocks shared by a plurality of users, so that each user is mediated, and thus, not only is the complexity reduced, but also the fairness of each user is ensured.

Description

technical field [0001] The invention relates to a scheduling scheme for physical layer resource block allocation in a next-generation mobile communication system, and belongs to the technical field of mobile communication. Background technique [0002] In order to meet people's high-speed and large-capacity requirements for mobile communication systems, the next-generation mobile communication system chooses Orthogonal Frequency Division Multiplexing (OFDM) as one of its key technologies, which divides a frequency band into Several small frequency bands that are orthogonal to each other are independently modulated, so that the spectral efficiency is greatly improved; in addition, this technology has a strong ability to resist multipath and intersymbol interference. [0003] However, since the number of sub-carriers increases sharply after the sub-bands are divided, the complexity of the algorithm and the processing delay are greatly increased, which is even unacceptable. Fo...

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Application Information

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IPC IPC(8): H04W16/10
Inventor 朱琦吕林输朱洪波杨龙祥
Owner CHINA INFOMRAITON CONSULTING & DESIGNING INST CO LTD
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