Method, device and base station for realizing resource coordination of BR-OFDMA system

Abstract

The invention provides a method, which comprises the following steps of: counting the number of average cell-edge users of each cell and the requirements of the average cell-edge users on occupied resources to determine the time-frequency resource amount used for BR-OFDMA of each cell by combining message interaction among a plurality of cells, and then allocating the same time-frequency resourceused for the BR-OFDMA for the plurality of cells; negotiating to determine a scrambling code of each cell, generating a corresponding long scrambling code according to the sequence number of the scrambling code, and then setting a long scrambling code sequence and the BR-OFDMA time-frequency resource into a mapping relation; and determining a block replication factor according to the number of the cells and the interference among the cells, and determining that the block number of the time-frequency resource allocated for the plurality of cells is integral multiple of the block replication factor. The invention also provides a device and a base station. Obviously, the method, the device and the base station solve the problem of coordinated allocation of the time-frequency resource among the plurality of cells.

Description

technical field [0001] The invention relates to the technical field of mobile communication, in particular to a method, device and base station for realizing resource coordination of a BR-OFDMA system. Background technique [0002] With the development of communication technology, broadband wireless communication will become the main development direction of mobile communication in the future. At present, in the IMT-Advanced system of ITU (International Telecommunication Union, International Telecommunication Union), the maximum bandwidth of wireless communication can reach 100MHz. Through broadband wireless communication, users can enjoy high-speed data download, online shopping, mobile video chat, mobile phone TV and many other wireless mobile services. However, the actual available wireless spectrum resources are limited. In order to effectively achieve the goal of high-speed wireless mobile communication, improving spectrum utilization and system capacity is the primary...

AI Technical Summary

Problems solved by technology

However, the wireless spectrum resources available in reality are limited. In order to effectively achieve the goal of high-speed wireless mobile communication, improving spectrum utilization and increasing system capacity are the primary considerations, especially to solve the throughput problem of cell edge users

[0003] At present, OFDM (Orthogonal Frequency Division Multiplicity, Orthogonal Frequency Division Multiplexing) has become the most competitive technology for the new generation of wireless communication, with high spectral efficiency, strong bandwidth scalability, strong anti-multipath fading ability, and flexible spectrum resource allocation. , combined with MIMO (Multi Input Multi Output, multiple input and output) technology is relatively simple and other advantages, but this technology also has some inherent limitations and problems that must be paid attention to in design, such as the comparison of frequency offset and the sensitivity of sending signals The PAPR (Peak to average Power Ratio, signal peak-to-average ratio) value is relatively large, and the narrowband subcarrier of OFDM is easily affected by the deep fading channel; compared with this, the biggest disadvantage of OFDM technology is: the ability to resist co-channel interference is very weak and cannot Guarantee the same-frequency networking of the cellular system; at present, in the broadband mobile communication system, the same-frequency networking is a basic requirement for operators

However, although soft frequency reuse technology can effectively avoid inter-cell interference, its defects are also obvious: first, the frequency resources at the edge of the cell are limited, making it difficult to support a large number of users and high data rates; The central user uses power limitation to avoid interference from adjacent cells, which reduces the system power utilization and leads to a decrease in the average throughput of the cell

[0005] In view of this, Datang Mobile Communication Equipment Co., Ltd. proposed a BR-OFDMA (Block Repeat-Orthogonal Frequency Division Multiple Access, Block Repeat-Orthogonal Frequency Division Multiple Access) technical solution to solve the above problems in the patents submitted in the past; but , using BR-OFDMA technology in order to more effectively eliminate and overcome inter-cell multi-user interference, BR-OFDMA needs to use multi-cell multi-user joint detection algorithm, which requires multi-cell system must carry out inter-cell resource coordination; that is, multiple Information exchange must be carried out between cells to coordinate the time-frequency resources, scrambling codes and repetition codes occupied by multi-cell edge users to solve the problem of BR-OFDMA resource coordination and allocation between multiple cells

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