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Uplink resource allocation and scheduling method of OFDMA (Orthogonal Frequency Division Multiple Access) system based on 802.16m

A scheduling method and resource allocation technology, applied in multi-frequency code systems, wireless communications, electrical components, etc., can solve problems that do not involve multi-services

Active Publication Date: 2013-04-24
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, people have proposed many resource allocation schemes for OFDMA systems, but many schemes only consider resource allocation in multi-user scenarios, and do not involve multi-service situations

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  • Uplink resource allocation and scheduling method of OFDMA (Orthogonal Frequency Division Multiple Access) system based on 802.16m
  • Uplink resource allocation and scheduling method of OFDMA (Orthogonal Frequency Division Multiple Access) system based on 802.16m
  • Uplink resource allocation and scheduling method of OFDMA (Orthogonal Frequency Division Multiple Access) system based on 802.16m

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Embodiment Construction

[0048] The present invention will be further described below in conjunction with accompanying drawing.

[0049] The invention is applicable to the uplink resource allocation of the OFDMA system based on IEEE 802.16m. figure 1 It is a schematic diagram of the uplink resource allocation and scheduling of the base station to the user in the OFDMA system based on IEEE 802.16m. When multiple users carrying multiple services need to transmit uplink data to the base station, the users first need to send bandwidth request information to the base station at a certain time. The base station allocates wireless resources reasonably according to the wireless channel conditions, the user's QoS requirements and the user's bandwidth request information, and maximizes the throughput of the system under the premise of ensuring the user's needs and meeting the user's transmit power constraints. Before the start of each uplink subframe, the base station will send the resource allocation status t...

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Abstract

The invention relates to an uplink resource allocation and scheduling method of an OFDMA (Orthogonal Frequency Division Multiple Access) system based on 802.16m. The traditional information transmission cost is high. The method of the invention comprises time slot allocation of a base station to users and time slot scheduling of the users on services. The time slot allocation is concretely as follows: the base station determines the priority of each user in the process of time slot allocation according to the bandwidth request information of the each user, then allocates a corresponding time slot to each user according to the priority and the signal-to-noise ratio of each user, determines a modulation mode in the time slot, and allocates corresponding power. The time slot scheduling is concretely as follows: the base station sends the resource allocation condition to each user through uplink management messages (UL-MAP), each user carries out uplink transmission according to the time slot allocated by the base station, and the resource scheduler of each user schedules concrete time slot allocation and services. The resource allocation method of the invention comprehensively considers multi-user and multi-service scenes and has wider application range.

Description

technical field [0001] The invention belongs to the field of wireless resource management in wireless communication, and relates to an uplink resource allocation and scheduling method of an OFDMA system based on IEEE 802.16m. Background technique [0002] In order to meet people's increasing demand for transmission rate and high-speed mobility requirements, the IEEE802.16 committee established the 802.16m project. The downlink data transmission speed of 802.16m can reach 1Gbps, and it can also be maintained at around 100Mbps under high-speed mobility. . Such a high rate benefits from some advanced technologies adopted in its physical layer, including Orthogonal Frequency Division Multiple Access (OFDMA) technology. OFDMA is the evolution of OFDM (Orthogonal Frequency Division Multiplexing, Orthogonal Frequency Division Multiplexing) technology. It is a transmission technology that uses OFDM to transform a channel into subcarriers, and then loads and transmits data on some s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L27/26H04W72/08H04W72/12H04W72/54
Inventor 陈惠芳谢磊丁旭东
Owner ZHEJIANG UNIV