Orthogonal frequency division multiple access system and method for wireless relay communication

A communication system and wireless communication technology, applied in the field of wireless relay communication OFDM access system, can solve the problems of complex structure, poor frequency diversity effect, high cost, etc.

CN102325121BInactive Publication Date: 2014-01-01HUAWEI TECH CO LTD
1 Cites 0 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2014-01-01
Estimated Expiration
Not applicable · inactive patent

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention relates to an orthogonal frequency division multiple access system and an orthogonal frequency division multiple access method for wireless relay communication. The system provided by the invention comprises a base station (BS), a relay station (RS) and a user terminal. The method mainly comprises the following steps of: setting a downlink relay zone and an uplink relay zone in a time division multiplexing (TDM) way in a downlink sub-frame and an uplink sub-frame of a physical layer frame structure of the BS respectively, setting a downlink relay zone in an uplink sub-frame of a physical layer frame structure of a frequency division duplexing (FDD) wireless receiver of the RS to define a relay sub-channel and orthogonal frequency division multiple access (OFDMA) symbol combinations for the reception of the RS from the downlink relay zone of the BS, and setting an uplink relay zone in a downlink sub-frame of a physical layer frame structure of an FDD wireless transmitter of the RS to define a relay sub-channel and OFDMA symbol combinations for the reception of the RS from the uplink relay zone of the BS; and performing the wireless relay communication among the BS, the RS and the user terminal in an FDD way based on the set uplink and downlink physical layer frames of the BS and the RS. By the system and the method, the single-FDD-wireless-transceiver-based relay communication of the RS can be realized in a communication system, the relay communication among the RS, the BS and the user terminal can be effectively ensured, and kinds of possible interference can be effectively avoided.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention relates to the technical field of wireless communication, in particular to a wireless relay communication orthogonal frequency division multiplexing access system and method. Background technique

[0002] IEEE802.16 is the first broadband wireless access standard, which mainly includes two versions: one is the 802.16 standard broadband fixed wireless access version 802.16-2004, and the other is the 802.16 standard broadband mobile wireless access version 802.16e . Only two network elements are defined in the 802.16-2004 standard, specifically BS (base station) and SS (subscriber station); in the 802.16e standard, only two network elements are also defined, specifically BS and MS (mobile subscriber station). stand).

[0003] At present, the 802.16Multihop Relay SG (802.16 Multihop Relay Research Group) only proposed the concept of RS (relay station) for WiMAX (Global Interoperability of Microwave Access). The relay communication entity ...

Examples

Embodiment Construction

[0121] The present invention provides a wireless relay communication OFDM access system and method. The advanced relay communication modes of RS, BS, and MS / SS provided by the present invention, such as Figure 5 As shown, RS communicates with BS and MS / SS using FDD / TDM / OFDMA, BS downlink and RS uplink use frequency f1, BS uplink and RS downlink use frequency f2; RS only needs a set of FDD wireless transceiver, RS as An MS / SS accesses the BS, and the MS / SS performs wireless relay access to the BS through the RS.

[0122] exist Figure 5 middle, DL BS It is the downlink subframe of the physical layer frame of BS, from BS to SS / MS BS or RS, UL BS is the uplink subframe of the physical layer frame of the BS, by the SS / MS BS or RS to BS, SS / MS BS Keep sending and receiving frame synchronization with BS; DL RS It is the downlink subframe of the physical layer frame of RS, from BS to SS / MS RS or RS, UL RS It is the uplink subframe of the physical layer frame of the RS, which...