Multi-cell resource allocation method introducing mobile resource reserve mechanism

Abstract

The invention discloses a multi-cell resource allocation method introducing a mobile resource reserve mechanism, which is characterized in that: a mobile resource reserve module obtains reserve information according to a user mobile model and transmits the reserve information to a multi-cell resource allocation module; the multi-cell resource allocation module determines a resource block set usable in each cell in the joint consideration of long statistic channel status information, reserve information and business service quality information. Compared with the existing multi-cell resource allocation method irrespective of the reserve mechanism, the multi-cell resource allocation method introducing the mobile resource reserve mechanism makes full use of the mobile model of a user, reserves resources for time delay sensitive business in advance during multi-cell resource allocation, and prevents the time delay sensitive business from overtime and packet loss of a data packet due to an inter-cell frequent handoff; meanwhile, in the joint consideration of service quality information of the mobile user, inter-cell interference and channel status information, the multi-cell resource allocation method introducing the mobile resource reserve mechanism coordinates the allocation of inter-cell resource blocks, effectively avoids the interference and maximizes the system throughput rate.

Description

technical field [0001] The invention belongs to the technical field of multi-cell resource allocation mobile communication, in particular to a resource allocation method in a multi-cell Orthogonal Frequency Division Multiple Access (OFDMA) system introducing a mobile resource reservation mechanism. Background technique [0002] Orthogonal frequency division multiple access technology is generally considered to be an indispensable technology in the fourth generation mobile communication system. Under this multiple access technology, the system has a smaller time-frequency two-dimensional resource allocation granularity. With the rapid development of wireless communication and the increasing demand for high-speed mobile environment applications, wireless communication is increasingly supporting high-speed mobile scenarios. In a high-speed mobile environment, due to the frequent handover of mobile users between cells and the long handover interruption time, it is a great chall...

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Problems solved by technology

However, the algorithm used in this multi-cell Orthogonal Frequency Division Multiple Access (OFDMA) resource allocation method often assumes that users are fixed in a certain cell within the allocation period.

In the mobile scenario, since the scheduling period of resource allocation based on long-term statistical channel state information is generally on the order of seconds, and the shortest period of handover decision is generally on the order of hundreds of milliseconds, the user is in a long multi-cell resource allocation period. Inter-cell handover will occur; especially when the real-time business is suddenly handed over to an adjacent cell but resources cannot be allocated, it will cause serious deterioration of user service experience

[0004] "International Institute of Electronics and Electrical Engineers Vehicular Technology Journal" (IEEE Transactions on Vehicular Technology, Volume.58, Issue3, pp.1415-1428, Mar.2009) introduces the use of mobile resource reservation protocol (MRSVP) for real-time services as its The cells that may be served during the service duration reserve a certain bandwidth to avoid serious packet loss and ensure the service quality of real-time services during the handover process; for non-real-time services, only reserve in this cell; but This kind of mobile resource reservation is limited to the user admission control after the resources allocated for each cell are determined by multi-cell resource allocation.

In multi-cell resource allocation, when allocating available resources for each cell, only the resources required by the current cell service users are considered, and resources reserved for users who may move to the cell during the allocation period are not considered.

If a user suddenly switches to an adjacent cell within the allocation period, the user or other service users in the cell will be denied access due to insufficient resources due to the lack of resources reserved for the user in the multi-cell resource allocation, which will greatly affect mobile user experience

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