Method and device for joint distribution of cell resources in OFDMA (Orthogonal Frequency Division Multiple Access) system

Abstract

The invention discloses a method and a device for joint distribution of cell resources in an OFDMA (Orthogonal Frequency Division Multiple Access) system. The method comprises the following steps: calculating the transmitting power of a user i in a cooperation region on a subcarrier j of a service cell; receiving a path gain from a neighbor cell site of the user i using the subcarrier j to the user i and the transmitting power of a user using the subcarrier j in a neighbor cell of the service cell of the user i, and updating the transmitting power of the user i on the subcarrier j of the service cell; calculating the signal-to-interference and noise ratio (SINR) of the user i on the subcarrier j of the service cell on the basis of the updated transmitting power; judging whether the SINR of the user i on the subcarrier j of the service cell satisfies a SINR threshold of the user i on the subcarrier j; if the SINR of the user i on the subcarrier j of the service cell does not satisfy the SINR threshold of the user i on the subcarrier j, increasing the transmitting power of the user i on the subcarrier j of the service cell in a preset step length, and continuing the procedure for calculating SINR by using the increased transmitting power as an updated transmitting power.

Description

technical field [0001] The present invention relates to the technical field of mobile communication, and more specifically, to a method and device for jointly allocating cell resources in an Orthogonal Frequency Division Multiple Access (OFDMA) system. Background technique [0002] Wireless spectrum is a scarce resource. With the increase of user requirements for transmission rate, a single user will occupy more and more spectrum resources. Therefore, in cellular mobile communication systems, spectrum multiplexing becomes a key factor to improve system performance. When adjacent cells use overlapping spectrum resources, it will cause serious inter-cell interference, which is one of the main factors affecting the performance of future mobile communication systems. The suppression of inter-cell interference can be achieved in many ways: [0003] (1) Dividing the frequency spectrum into non-overlapping frequency bands and making adjacent cells use non-overlapping frequency ban...

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Problems solved by technology

[0005] (3) Only the carrier allocation within a single cell is considered, and the inter-cell interference is not considered, so it generally needs to be used in combination with the technology in (2)

[0006] Generally speaking, the existing OFDMA system carrier allocation methods generally have the following defects: 1) Carrier allocation cannot be coordinated from the network as a whole, or from a network in a larger area; 2) Power is another important factor affecting inter-cell interference , failing to combine carrier allocation and power allocation

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