Discrete velocity layer-striding power distribution method suitable for distributed antenna system

Abstract

The invention provides a discrete speed cross-layer power distribution method suitable for a distribution type antenna system which relates to a cross-layer power distribution method suitable for a single subdistrict distribution type antenna system among each user. In the distribution type antenna system, a suitable power is distributed to each user for completing an operation transmitting from point to point. The method obtains a queue state information of a data link layer and a channel state information of a physical layer in condition of assuming a base station only using finite discrete transmitting speed, then processes cross-layer power distribution by using a throughput a coefficient of improved particle group arithmetic optimizing system and a fairness coefficient. The discrete transmitting speed assuming is more coincided with factual system, the distribution type antenna system uses the cross-layer distribution method that can improve system queue time delay performance, system throughput performance and system fairness performance.

Description

technical field [0001] The invention relates to an adaptive cross-layer power allocation method suitable for a distributed antenna system, which belongs to the field of wireless resource management in mobile communication. technical background [0002] The distributed antenna system (Distributed Antennas System, DAS) disperses multiple antennas in different locations of the cell, and connects these antennas to the base station through optical fiber, cable or wireless transmission, reducing the average distance between the antenna and mobile users , can improve the coverage capability and system capacity of the system wireless signal, and thus become a new trend in the development of the public wireless interface in the future. [0003] Power allocation is one of the essential resource management techniques in distributed antenna systems, which directly affects the overall performance of the system. At present, the research on power allocation mainly focuses on centralized s...

AI Technical Summary

Problems solved by technology

The literature "Zou J, Bhargava V K. Optimized power allocation for mixed rate traffic in DS-CDMA cellular system. Electronics Letters, 1995, 31(22): 1902-1903" was the first to study the optimal power allocation for mixed service DS-CDMA systems; The literature "Wong C Y, Cheng R S.Multiuser OFDM with adaptive subcarrier bit and power allocation. IEEE Journal on Selected Areas in Communications, 1999, 17(10): 1747-1758" studies the multiuser OFDM system with the goal of minimizing the total transmission power of the system Subcarrier allocation, bit loading and power allocation; literature "Kim H, Kim Y, Han S L, et al. Research the carrier allocation and power allocation of the uplink OFDMA system with the goal of optimizing the system and rate capacity, and give the joint allocation algorithm of carrier and power; the literature "Liu Y, Kwok Y K, Wang J.Downlink TCP performance under cross layer rate and power allocation in infrastructureTH- PPM UWB networks.2007 IEEE International Conference on Communications, Glasgow, Scotland, 2007.6135-6140 "Research on the downlink cross-layer rate and power allocation of TH-PPM ultra-wideband systems, and propose a depth-first algorithm and breadth based on the establishment of a multi-layer optimization model priority algorithm, but the fairness of the depth-first algorithm is poor, and the system throughput performance of the breadth-first algorithm is poor; the literature "Feiten A, MatharR, Reyer M.Rate and power allocation for multiuser OFDM: an effective heuristic verified by branch-and-bound. IEEE Trans Wireless Communica tions, 2008, 7(1): 60-64" proposed a heuristic algorithm based on branch and bound for rate and power allocation of multi-user OFDM systems, and received better system performance; the literature "Choi J.Power allocation for two different traffics in layered MIMO systems. IEEE Trans Wireless Communications, 2008, 7(10): 3942-3950" research on power allocation between two different traffic in layered MIMO relay systems

Literature "Xu W, Niu K. Time-frequency resource allocation for min-rate guaranteed services in OFDM distributed antenna systems. IEEE Global Telecommunications Conference, Washington, DC, USA, 2007.3714-3718" "Song X, He Z. A hierarchical resource allocation for OFDMA wireless distributed communication systems.IEEE GlobalTelecommunications Conference, Washington, DC, USA, 2007.5195-5199" Under the constraints of total system power and user minimum rate, etc., the downlink subcarrier and power allocation algorithm that maximizes the rate capacity are studied, but these algorithms do not consider Queue information, which belongs to single-layer optimization

Images