Interference control method and device

Abstract

The invention discloses an interference control method and device. The method comprises the following steps of: determining subframes of a neighbor cell for transmitting a packet broadcast channel (PBCH) and a synchronous channel (SS) respectively; and processing the determined subframes respectively: determining resource blocks (RBs) corresponding to the RBs occupied by the PBCH and SS of the neighbor cell in the system bandwidth of a cell and reducing the dispatching priorities or transmitting powers of the corresponding RBs to be lower than the dispatching priorities or transmitting powers of the RBs except the corresponding RBs, or processing the determined subframes respectively: determining orthogonal frequency division multiplexing (OFDM) symbols corresponding to the OFDM symbols occupied by the PBCH and SS of the neighbor cell in all the OFDM symbols occupied by the cell and reducing the transmitting powers of the corresponding OFDM symbols to be lower than the transmitting powers of the OFDM symbols except the corresponding OFDM symbols. The properties of the PBCH and SS can be improved by applying the method and the device.

Description

technical field [0001] The invention relates to mobile communication technology, in particular to an interference control method and device. Background technique [0002] At present, the following two networking modes are mainly adopted in the Long Term Evolution (LTE) system: a networking mode with a frequency reuse factor of N and a networking mode with a frequency reuse factor of 1, where N is a positive integer greater than 1. [0003] In the first networking mode, the total available bandwidth of the system is divided into N subbands, which are orthogonal to each other, and N different cells occupy N different subbands respectively. [0004] figure 1 It is a schematic diagram of a networking mode with an existing frequency reuse factor of N. Such as figure 1 As shown, assuming that the total available bandwidth is 60MHz, it is divided into 3 subbands (that is, the value of N is 3), and each subband is 20MHz (that is, the system bandwidth of the 3 cells is 20MHz), and...

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Problems solved by technology

like Figure 4 As shown, the broadcast channel (PBCH) occupies the 1.08MHz frequency band in the middle of the system bandwidth of each cell (the hatched part), and the physical downlink shared channel (PDSCH) occupies the rest of the frequency band (unfilled part), or the synchronization channel (SS) Occupying the 1.08MHz frequency band, the PDSCH channel still occupies the remaining frequency bands, and the broadcast channel and synchronization channel are usually sent in different subframes; it can be seen that the frequency bands occupied by the broadcast channel and synchronization channel of the three cells are orthogonal to each other. For the synchronization channel and broadcast channel of a cell such as cell A, when the load of cell C is light, its PDSCH channel is rarely sent, then the interference between the broadcast channel and synchronization channel of cell A will be very small, but , if the load of cell C is heavy and its PDSCH channel continues to send, it will cause serious interference to the broadcast channel and synchronization channel of cell A, thereby affecting the performance of the broadcast channel and synchronization channel

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