Joint optimization method of wireless self-backhaul small base station access control and resource allocation

Abstract

The invention relates to a wireless self-backhaul small base station access control and resource allocation joint optimization method, which belongs to the field of wireless communication. The method includes: under the premise of the average delay constraint of each user and the transmission power constraint of each base station, using the Markov decision process to establish a joint maximum spectrum efficiency and wireless resource allocation method for wireless self-backhaul small base stations A multi-objective optimization model for energy efficiency; in the environment of random dynamic arrival of user data packets, an approximate dynamic programming method is used to formulate the best access and resource allocation strategy for any dynamically arriving user demand, so that the system can operate in a relatively long-term Higher spectrum efficiency and energy efficiency can be obtained in resource allocation. The wireless self-backhaul small base station access control and resource allocation joint optimization method proposed by the present invention can maximize the long-term average spectrum efficiency and energy efficiency while ensuring the average delay constraint and transmission power constraint.

Description

technical field [0001] The invention belongs to the field of wireless communication, and relates to a joint optimization method for wireless self-backhaul small base station access control and resource allocation in a double-hop network scenario in which one macro base station is fixedly deployed at the center, multiple small base stations and multiple users. Background technique [0002] In future 5G network research, the dense deployment of Wireless Self-backhaul small base stations is regarded as a key technology to realize ultra-dense network (Ultra dense network, UDN), which has attracted widespread attention. Within the coverage of macro base stations, small base stations use wireless millimeter waves or microwaves to replace traditional wired fiber optic connections, which can reduce system deployment costs. The use of massive MIMO antennas in macro base stations can increase the frequency spectrum spatial reuse rate. However, for different requirements of different ...

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Problems solved by technology

[0003] In the existing resource allocation schemes, most of them only focus on how to determine the corresponding resource allocation strategy for the currently arriving user demand, while ignoring the impact of the current decision on resource allocation for the subsequent arriving user demand; the small base station Receiving and sending are strictly limited to two orthogonal time or frequency channels, and the small base station does not realize that the small base station receives the downlink backhaul link data from the macro base station and uses the same spectrum resources to transmit the downlink access link data to the small user at the same time And other issues

In addition, common optimization objectives do not consider the randomness of user data packet arrival, the delay characteristics of data packet transmission, and the impact of resource remaining on resource allocation, and only consider the optimization of spectrum efficiency or energy efficiency alone

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