CN1960239B

CN1960239B - Wireless transfer communication system based on TDM/TDMA FDD, and communication method

Info

Publication number: CN1960239B
Application number: CN2005101174783A
Authority: CN
Inventors: 郑若滨
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2005-10-31
Filing date: 2005-10-31
Publication date: 2011-04-13
Anticipated expiration: 2025-10-31
Also published as: CN1960239A

Abstract

This invention mainly consists of the base station (BS), the relay station (RS) and the user terminal (UT). RS offers respectively interfaces communicating with BS and UT. Each RS possesses two frequency-division duplex FDD wireless emitter physical layer unit working in different frequency. It also possesses two FDD wireless receiver physical layer unit working in corresponding different frequency. The corresponding down-going and up-going relay section are set under the time-division multiplexing mode in the physical layer frame structures of both BS and RS to define the time slots during info exchange between BS and RS. The wireless relay comm. is realized between BS and RS on the basis of the up-going and down-going physical layer frames under the FFD mode. This invention causes that the business data are relayed mutually via RS between BS and MS/SS in the comm. system. Simultaneously, this invention avoids various interferes may appearing in the comm. system.

Description

Wireless transfer communication system based on TDM/TDMA-FDD and communication method thereof

Technical Field

The invention relates to the technical field of wireless communication, in particular to a wireless transfer communication system based on TDM/TDMA-FDD and a communication method thereof.

Background

IEEE 802.16 is the first broadband wireless access standard, which mainly includes two versions, one is the broadband fixed wireless access version 802.16-2004 of the 802.16 standard, and the other is the broadband mobile wireless access version 802.16e of the 802.16 standard. 802.16-2004 only defines two network elements, BS (base station) and SS (subscriber station); similarly, 802.16e also defines only two network elements, BS and MSS (mobile subscriber station).

Currently, 802.16multi hop Relay SG (802.16 multi-hop Relay research group) only proposes the concept of WiMAX (worldwide interoperability for microwave access) RS (Relay station), and an important role of the RS is as a Relay between a BS and an SS/MSS, to expand the coverage of the BS or increase the throughput of a subscriber station. In order to support the RS to realize the corresponding functions, the BS, the RS and the MS/SS all need to adopt a reasonable networking structure and a corresponding physical layer frame structure.

At present, there is no relay communication system that can meet the requirement of relay communication.

Next, a frame structure that may be adopted in the relay communication process is described.

In the 802.16 standard, for a licensed frequency band, the duplex mode may be FDD (frequency division duplex) and TDD (time division duplex), the SS in the FDD mode may be half-duplex FDD, and for an unlicensed frequency band, the duplex mode may only be TDD. In the FDD system, the downlink is TDM (time division multiplexing) and the uplink is TDMA (time division multiplexing access).

802.16OFDM (orthogonal frequency division multiplexing) or SC (single carrier) frame structure in FDD, as shown in fig. 1. Data transmitted on the physical channel is transmitted in a Frame (Frame) format. Each frame includes a downlink subframe (DL subframe) and an uplink subframe (UL subframe). In the FDD mode, the downlink subframe and the uplink subframe use different frequencies for transmission. One downlink subframe has only one downlink physical layer protocol data unit (DL PHY PDU), and one uplink subframe contains time slots in the following order: an initial Ranging Contention slot (Contention slot for initial Ranging), a bandwidth request Contention slot (Contention slot for BW requests), and one or more uplink physical layer protocol data units (UL PHY PDUs), each UL PHY PDU from a different Subscriber Station (SS).

The downlink PHY PDU starts with a preamble (preamble) for physical synchronization; this is followed by an FCH Burst (Burst) that includes DL _ Frame _ Prefix (DLFP, downlink Frame Prefix) to specify the profile (usage method) and length of one or more downlink bursts that follow the FCH. The DL-MAP (Downlink MAP) message, if sent in the current frame, will be the first MAC PDU following the FCH. The UL-MAP (downlink mapping table) immediately follows the DL-MAP (if transmitted) or the DLFP. If DCD (Downlink channel descriptor) and UCD (uplink channel descriptor) messages are sent in a frame, they will immediately follow DL-MAP and UL-MAP. DL-MAP, UL-MAP, DCD and UCD will be transmitted at DLburst # 1. The location and profile of the other bursts are specified by the DL-MAP. If it is DL PHYburst of OFDM physical layer, to obtain integer multiple of OFDM symbol, the deficiency behind the effective payload is supplemented with 0xFF byte (Pad).

Although the above frame structure can ensure the communication needs in the communication system, the frame structure shown in fig. 1 cannot satisfy the relay communication needs for the relay communication system including the RS.

Disclosure of Invention

The invention aims to provide a wireless transfer communication system and a data transmission method based on TDM/TDMA-FDD, thereby providing a corresponding reasonable networking mode for the transfer communication system containing RS, and simultaneously providing a corresponding physical layer frame structure so as to facilitate the reliable transmission of service data in the transfer communication system.

The purpose of the invention is realized by the following technical scheme:

the invention also provides a wireless transfer communication system based on TDM/TDMA-FDD, which comprises a base station BS, a transfer station RS and a user terminal, wherein the RS is respectively provided with interfaces for communicating with the BS and the user terminal, and the RS comprises a first TDM/TDM access TDMA-FDD wireless transceiver and a second TDM/TDMA-FDD wireless transceiver, wherein the TDM/TDMA-FDD wireless transceiver in the RS comprises a TDM-FDD wireless transmitter physical layer unit and a TDMA-FDD wireless receiver physical layer unit which correspond to and keep transmitting and receiving frame synchronization with the TDM-FDD wireless receiver physical layer unit and the TDMA-FDD wireless transmitter physical layer unit in the user terminal, and the second TDM/TDMA-FDD wireless transceiver in the RS comprises a TDMA-FDD wireless transmitter physical layer unit and a TDM-FDD wireless receiver physical layer unit which correspond to and keep transmitting and receiving frame synchronization with the TDMA-FDD wireless transmitter physical layer unit in the BS The physical layer unit of the wireless receiver corresponds to the physical layer unit of the TDM-FDD wireless transmitter and keeps the synchronization of the transceiving frames.

The BS is also provided with a wired transmission processing unit connected with the upper-level equipment.

The BS, the RS and the user terminal are respectively provided with corresponding TDM-TDMA wireless transceiver data link layer units.

The BS also provides an interface for communicating with the user terminal, and the BS directly sends the Preamble, the frame control header FCH, the downlink mapping table DL-MAP and the uplink mapping table UL-MAP information to the user terminal from the interface by adopting a preset channel coding and modulation mode or adopting a preset transmitting power value.

The invention also provides a method for realizing wireless transfer communication based on TDM/TDMA-FDD, comprising the following steps:

A. setting a downlink transfer zone and an uplink transfer zone in a Time Division Multiplexing (TDM) mode in a downlink subframe and an uplink subframe of a physical layer frame structure of a Frequency Division Duplex (FDD) -based Base Station (BS), and setting the downlink transfer zone and the uplink transfer zone in the uplink subframe and the downlink subframe of a physical layer frame structure of a second TDM/TDMA-FDD wireless transceiver of an RS respectively, wherein the downlink subframe and the uplink subframe are used for defining a time slot for information interaction between the BS and the RS;

B. and performing wireless relay communication among the BS, the RS and the user terminal in an FDD mode based on the set uplink and downlink physical layer frames of the BS and the RS.

The downlink transfer zone of the BS corresponds to the time slot and frequency relationship of the downlink transfer zone of the RS second TDM/TDMA-FDD wireless transceiver, the uplink transfer zone of the BS corresponds to the time slot and frequency relationship of the uplink transfer zone of the RS second TDM/TDMA-FDD wireless transceiver, and in the period corresponding to the uplink transfer zone of the BS, the user terminal does not arrange any sending time slot, and the RS does not arrange any receiving time slot.

The step A comprises the following steps:

and setting a downlink relay broadcast time slot in a downlink relay zone of a second TDM/TDMA-FDD wireless transceiver of the BS or the RS, wherein the downlink relay broadcast time slot is used for defining the downlink time slot broadcast to the RS by the BS, and the uplink time slot for receiving the downlink relay broadcast time slot of the BS by the RS.

The step A comprises the following steps:

and setting downlink interference time slots in downlink subframes of a physical layer frame structure of a first TDM/TDMA-FDD wireless transceiver of the BS or the RS, wherein the downlink interference time slots are used for defining downlink data time slots in coverage areas of the BS and the RS, and the coverage areas respectively comprise overlapping areas only covered by the BS and the RS, or non-overlapping areas covered by the BS and the RS and overlapping areas covered by the BS and the RS.

The step A further comprises the following steps:

and a downlink interference time slot set in a downlink subframe of the BS and a downlink interference time slot defined in a downlink subframe of the first TDM/TDMA-FDD wireless transceiver of the RS are not overlapped on the time slot.

The step A comprises the following steps:

setting a head time slot of a downlink sub-frame in a downlink sub-frame of a physical layer frame structure of a BS, wherein the head time slot is defined as the starting time of the downlink sub-frame, is used for defining a time slot for sending user synchronization information and a time slot for sending indication information, and is used for indicating the positions of the time slots of the downlink sub-frame and the uplink sub-frame of the physical layer frame structure of the BS and a using method.

The step A comprises the following steps:

when the BS can not directly communicate with the user terminal under the coverage of the RS, a downlink sub-frame header time slot is set in a downlink sub-frame of a first TDM/TDMA-FDD wireless transceiver of the RS, and is defined as the starting moment of the downlink sub-frame, used for defining a time slot for sending user synchronization information and a time slot for sending indication information, and used for indicating the position and the using method of each time slot of the downlink sub-frame and the uplink sub-frame of the RS physical layer frame structure.

The step A comprises the following steps:

the downlink subframe header time slot of the RS lags behind the downlink subframe header time slot of the BS in time, and the downlink subframe header time slot of the RS cannot overlap with the downlink subframe header time slot, the downlink relay zone, and the downlink interference time slot of the BS.

The step A comprises the following steps:

when a plurality of RSs exist, the downlink subframe header time slot of the RS cannot be overlapped with the downlink subframe header time slot and the downlink interference time slot of other RSs,

or,

when a plurality of RSs exist, the downlink subframe head time slots of different RSs are overlapped in time, complete overlapping synchronization is required, the contents of the downlink subframe head time slots must be the same, and the downlink subframe head time slots of the RSs cannot be overlapped with the downlink interference time slots of other RSs.

The step A comprises the following steps:

and setting a downlink subframe head receiving time slot in a physical layer frame structure of the RS second TDM/TDMA-FDD wireless transceiver, wherein the downlink subframe head receiving time slot is used for defining the time for receiving the downlink subframe head time slot of the BS, and the downlink subframe head receiving time slot of the RS is required to be completely overlapped and synchronized with the downlink subframe head time slot of the BS.

The step A comprises the following steps:

and setting an uplink interference time slot in an uplink subframe in a first TDM/TDMA-FDD wireless transceiver of the RS, wherein the uplink interference time slot is used for defining uplink data time slots under the coverage areas of the BS and the RS respectively, and the coverage areas respectively comprise an overlapping area covered by the BS and the RS respectively only or comprise a non-overlapping area covered by the BS and the RS respectively and an overlapping coverage area covered by the BS and the RS respectively.

And the uplink interference time slot set in the uplink subframe of the BS and the uplink interference time slot set in the uplink subframe of the first TDM/TDMA-FDD wireless transceiver of the RS are not overlapped in time.

The step A comprises the following steps:

the uplink contention slot set in the uplink subframe of the physical layer frame structure of the BS includes an initial ranging contention slot and a bandwidth request contention slot.

The step A further comprises the following steps:

when the BS can not directly communicate with the user terminal in the RS coverage area, setting an uplink contention slot including an initial ranging contention slot and a bandwidth request contention slot in an uplink subframe of the RS first TDM/TDMA-FDD wireless transceiver.

The step A further comprises the following steps:

and setting an uplink contention transmission time slot in an uplink subframe of the RS second TDM/TDMA-FDD wireless transceiver, wherein the time of the uplink contention transmission time slot used for contending the BS is transmitted by the RS.

The time slot and frequency relation between the uplink competition time slot of the BS and the uplink competition sending time slot of the RS are completely overlapped and synchronized, and the uplink competition sending time slot of the RS cannot be overlapped with the uplink transfer area and the uplink interference time slot of the uplink subframe of the BS.

The step A comprises the following steps:

when a plurality of RSs exist in the communication system, the plurality of RSs share an uplink, a downlink relay zone, a downlink interference time slot or an uplink interference time slot in a TDM mode.

The step A comprises the following steps:

in a downlink subframe or an uplink subframe of a physical layer frame structure of the BS, or in a downlink subframe or an uplink subframe of the first TDM/TDMA-FDD radio transceiver of the RS, a downlink interference-free time slot or an uplink interference-free time slot is set for defining a downlink or uplink data time slot of a non-overlapping area covered only by the BS or the RS, respectively.

The step A comprises the following steps:

the downlink interference-free time slot of the BS and the downlink interference-free time slot of the RS first TDM/TDMA-FDD wireless transceiver, and the uplink interference-free time slot of the BS and the uplink interference-free time slot of the RS first TDM/TDMA-FDD wireless transceiver can be overlapped.

The frame head time slot of the downlink sub frame of the RS first TDM/TDMA-FDD wireless transceiver needs to be positioned in the downlink non-interference time slot of the downlink sub frame of the physical layer frame structure of the BS in terms of time.

The step A comprises the following steps:

the said downlink sub-frame head time slot and the uplink competition time slot are set to exist in each frame of BS and RS, the said downlink relay zone, uplink relay zone, downlink interference time slot, uplink competition sending time slot of RS, downlink non-interference time slot and uplink non-interference time slot are not set to exist in each frame.

The step B comprises the following steps:

and performing message interaction among the BS, the RS and the user terminal based on an uplink and downlink transfer area, an uplink and downlink interference area, a downlink subframe head time slot and/or an uplink competition time slot which are contained in the uplink and downlink physical layer frames and the downlink physical layer frames of the BS and the RS, and realizing wireless transfer communication.

downlink communication process from BS to user terminal:

C. the BS sends data to the RS in a downlink transfer area of a downlink subframe of the BS, and the RS receives the data through the downlink transfer area in an uplink subframe of a second TDM/TDMA-FDD wireless transceiver of the RS;

D. the RS sends data to the user terminal in a downlink subframe of a first TDM/TDMA-FDD wireless transceiver of the RS;

uplink communication process from user terminal to BS:

E. the method comprises the steps that uplink data to be sent are sent in an uplink subframe of a first TDM/TDMA-FDD wireless transceiver of an RS through a user terminal, and the data are received by the first TDM/TDMA-FDD wireless transceiver of the RS;

F. and the RS sends uplink transfer data in an uplink transfer area of a downlink subframe of the RS second TDM/TDMA-FDD wireless transceiver, and the BS receives the transfer data in the uplink transfer area of the uplink subframe of the BS.

The downlink communication process from the BS to the user terminal further includes:

and the BS and/or the RS first FDD wireless transceiver respectively sends lead codes at the first symbol of the head of the downlink sub-frame of the corresponding downlink sub-frame, and the RS or the user terminal receiving the lead codes is synchronous with the BS or the RS.

In the present invention, after sending the preamble, the method further includes:

the BS and/or the RS first TDM/TDMA-FDD wireless transceiver also needs to send FCH, DL-MAP and UL-MAP information, and the RS or the user terminal receiving the information determines the time slot position and the using method information of each burst according to the information.

The step C further comprises the following steps:

and the BS sends a broadcast message to the RS in a downlink relay broadcast subchannel of a downlink relay zone of a downlink subframe of the BS, and the RS receives the message through the downlink relay broadcast subchannel in an uplink subframe of a second TDM/TDMA-FDD wireless transceiver of the RS.

In the present invention, the downlink communication process from the BS to the ue further comprises:

a user terminal receives a lead code in a downlink subframe header of a BS downlink subframe and synchronizes with the BS;

the user terminal receives FCH, DL-MAP and UL-MAP information from the BS, and obtains slot position and usage method information of each burst of the BS and the RS.

The uplink communication process from the user equipment to the BS further includes:

a user terminal receives FCH, DL-MAP and UL-MAP information of a downlink subframe head of a downlink subframe of a first TDM/TDMA-FDD wireless transceiver of an RS, and determines time slot positions and using method information of each burst of the RS; or the user terminal receives the FCH, DL-MAP and UL-MAP information of the downlink subframe head of the downlink subframe of the BS, and determines the time slot position and the using method information of each burst of the BS and the RS;

and the RS second TDM/TDMA-FDD wireless transceiver receives FCH, DL-MAP and UL-MAP information of a downlink sub-frame header in a downlink sub-frame of the BS, and acquires time slot positions and using method information of each burst of the BS.

In the invention, the BS, the RS and the user terminal also carry out relay communication based on orthogonal frequency division multiplexing OFDM.

A relay station, a relay station RS is provided with interfaces for communication with a BS and a user terminal, respectively, and includes a first time division multiplexing TDM/time division multiplexing access TDMA-frequency division duplexing FDD radio transceiver and a second TDM/TDMA-FDD radio transceiver in the RS, wherein, the TDM-FDD wireless transmitter physical layer unit and the TDMA-FDD wireless receiver physical layer unit contained in the first TDM/TDMA-FDD wireless transceiver in the RS correspond to the TDM-FDD wireless receiver physical layer unit and the TDMA-FDD wireless transmitter physical layer unit in the user terminal and keep the transceiving frame synchronization, and the TDMA-FDD wireless transmitter physical layer unit and the TDM-FDD wireless receiver physical layer unit contained in the second TDM/TDMA-FDD wireless transceiver in the RS correspond to the TDMA-FDD wireless receiver physical layer unit and the TDM-FDD wireless transmitter physical layer unit in the BS and keep the transceiving frame synchronization.

The RS is also provided with a TDM-TDMA wireless transceiver data link layer unit.

A method for realizing wireless transit communication based on TDM/TDMA-FDD includes:

respectively setting a downlink transfer zone and an uplink transfer zone in an uplink subframe and a downlink subframe of a physical layer frame structure of a second TDM/TDMA-FDD wireless transceiver of the RS, and defining a time slot for information interaction between the BS and the RS, wherein the BS is based on the FDD, and the downlink subframe and the uplink subframe of the physical layer frame structure of the BS are respectively set with the downlink transfer zone and the uplink transfer zone in a time division multiplexing TDM manner;

and realizing wireless transfer communication between the BS and the user terminal by adopting an FDD mode based on the set uplink and downlink physical layer frames of the RS.

The process of defining the time slot for information interaction between the BS and the RS comprises the following steps:

and setting a downlink relay broadcast time slot in a downlink relay zone of a second TDM/TDMA-FDD wireless transceiver of the RS, wherein the downlink relay broadcast time slot is used for defining an uplink time slot of the RS for receiving the downlink relay broadcast time slot of the BS.

and setting a downlink interference time slot in a downlink subframe of a physical layer frame structure of the RS first TDM/TDMA-FDD wireless transceiver, wherein the downlink interference time slot is used for defining a downlink data time slot in an RS coverage area, and the coverage area comprises an overlapping area only covered by the BS and the RS respectively, or comprises a non-overlapping area covered by the BS and the RS respectively and an overlapping area covered by the BS and the RS respectively.

The process of defining the time slot for information interaction between the BS and the RS further includes:

The downlink subframe header time slot of the RS lags behind the downlink subframe header time slot of the BS in time, and the downlink subframe header time slot of the RS cannot be overlapped with the downlink subframe header time slot, the downlink relay zone and the downlink interference time slot of the BS.

The method further comprises the following steps:

in the process of defining the time slot for information interaction between the BS and the RS, when a plurality of RSs exist, the head time slot of the downlink sub-frame of the RS cannot be overlapped with the head time slot and the downlink interference time slot of the downlink sub-frame of other RSs,

or,

in the process of defining the time slot for information interaction between the BS and the RS, when a plurality of RSs exist, the downlink subframe header time slots of different RSs overlap in time, and complete overlap synchronization is required, and the contents of the downlink subframe header time slots must be the same, and the downlink subframe header time slots of the RSs cannot overlap with the downlink interference time slots of other RSs.

The method further comprises the following steps:

in the process of defining the time slot for information interaction between the BS and the RS, an uplink contention transmission time slot is set in an uplink subframe of the second TDM/TDMA-FDD wireless transceiver of the RS, and is used for defining the time of the uplink contention time slot which is transmitted by the RS and used for contending the BS.

The method further comprises the following steps:

the RS receives data sent to the RS by the BS in the downlink transfer area of the downlink subframe of the BS through the downlink transfer area of the uplink subframe of the RS second TDM/TDMA-FDD wireless transceiver, and sends the data to the user terminal in the downlink subframe of the RS first TDM/TDMA-FDD wireless transceiver;

or,

and the first TDM/TDMA-FDD wireless transceiver of the RS receives uplink data to be transmitted, which are transmitted by the user terminal in an uplink subframe of the first TDM/TDMA-FDD wireless transceiver of the RS, and transmits the uplink relay data to the BS in an uplink relay area of a downlink subframe of the second TDM/TDMA-FDD wireless transceiver of the RS.

The method further comprises the following steps:

and the RS receives the broadcast message sent to the RS by the BS in the downlink relay sub-channel of the downlink relay zone of the BS downlink sub-frame through the downlink relay broadcast sub-channel in the uplink sub-frame of the RS second TDM/TDMA-FDD wireless transceiver.

The method further comprises the following steps:

It can be seen from the above technical solutions provided by the present invention that, the present invention provides two FDD-based transit communication systems, which specifically include: the OFDM (or SC) wireless advanced transfer mode is supported, namely the MS/SS can perform wireless transfer access to the BS through the RS; and support OFDM (or SC) wireless simplified relay mode, namely the downlink data message of BS or message except DL-MAP, UL-MAP, can pass RS relay; the uplink timeslot of the BS may be transferred through the RS except for the initial Ranging contention timeslot and the bandwidth request contention timeslot. Therefore, the invention provides a feasible networking implementation scheme for the specific implementation of relay communication based on RS.

The invention also defines the physical layer frame structure of BS and RS, to realize the transfer interaction of service data via RS. Effectively ensures the communication between the RS and the BS and between the MS/SS in a TDM/TDMA-FDD mode. The invention can effectively avoid the following interference:

1. RS to SS/MS_RSRS to SS/MS_BSAnd BS to SS/MS_RSInterference of (2);

2、SS/MS_BSto BS, SS/MS_BSTo RS and SS/MS_RSInterference to the BS;

3. RS to RS self interference.

Drawings

Fig. 1 is a schematic diagram of a frame structure based on FDD;

FIG. 2 is a schematic diagram of a communication system model of RS and BS, MS/SS for an uplink single RS case;

FIG. 3 is a schematic diagram of a communication system model of RS and BS, MS/SS for a single RS downlink case;

FIG. 4 is a communication system model diagram of RS and BS, MS/SS for a multiple RS case;

FIG. 5 is a schematic diagram of co-channel interference patterns;

FIG. 6 is a diagram illustrating an advanced relay communication mode of a BS and an RS;

FIG. 7 is a simplified relay communication pattern diagram of a BS and an RS;

FIG. 8 is a schematic structural diagram of a system provided by the present invention;

fig. 9 is a schematic diagram of a physical layer frame structure in the advanced relay communication mode;

fig. 10 is a schematic diagram of a physical layer frame structure in a simplified transit communication mode;

FIG. 11 is a diagram illustrating a first physical layer frame structure of a BS and an RS;

fig. 12 is a diagram illustrating a second physical layer frame structure of the BS and the RS.

Detailed Description

Fig. 2, fig. 3 and fig. 4 show a communication system model including RS, BS and MS/SS, where fig. 2 shows a case of a single downlink RS, fig. 3 shows a case of a single uplink RS, and fig. 4 shows a case of multiple RSs. In the communication system model, TDM (time division multiplexing)/TDMA (time division multiplexing access) -FDD communication is adopted between RS and BS and MS/SS, frequency f2 is adopted for BS and RS downlink, and frequency f1 is adopted for BS and RS uplink, thereby realizing frequency division duplex, namely FDD. The RS is used as an MS/SS to access the BS, and for the advanced transfer mode, the MS/SS performs wireless transfer access to the BS through the RS. In FDD mode, there may be 4 cases of mutual interference between network system communications as shown in fig. 5(a) - (d). Wherein, TX denotes a transmitting module, and RX denotes a receiving module.

For convenience of subsequent description, in fig. 2 to 4, the coverage area of the BS is divided into 3 zones:

zone 1: BS-only downlink coverage, no RS to MS/SS belonging to BS (MS in FIG. 2)_BS) Interference of (2);

zone 2: BS and RS can both be covered in downlink, and RS to SS/MS exist_BS"and" BS to SS/MS_RS"interference;

zone 3: RS-only downlink coverage, no BS to MS/SS belonging to RS (MS in FIG. 2)_RS) The interference of (2).

In fig. 4, the overlapping region of BS and RS1 is region 2 of RS1, and the overlapping region of BS and RS2 is region 2 of RS 2.

The present invention also divides the coverage area of the RS in fig. 2 to 4 into 3 zones:

zone 11: BS only can be covered in uplink, and 'SS/MS' does not exist_RSInterference to the BS ";

22, area: both BS and RS can be covered in uplink, and 'SS/MS' exists_BSTo RS 'and' SS/MS_RSInterference to the BS ";

region 33: RS-only uplink coverage without SS/MS_BSInterference to RS ".

In fig. 4, the overlapping region of BS and RS1 is region 22 of RS1, and the overlapping region of BS and RS2 is region 22 of RS 2.

The relay communication system provided by the present invention will be described below with reference to the accompanying drawings, and the present invention specifically includes a communication system in an advanced relay communication mode and a communication system in a simplified relay communication mode.

The RS and BS, MS/SS advanced relay communication mode provided by the present invention is shown in fig. 6, and in the advanced relay communication mode, the BS cannot directly communicate with the user terminal in the RS coverage area. In fig. 6, the RS needs two sets of FDD transceivers: the first set of transmitter TX1 operates at frequency f1, and the receiver RX1 operates at frequency f 2; the second set of transmitter TX2 operates at frequency f2 and the receiver RX2 operates at frequency f 1. DL_BSFrom BS to SS/MS for downlink sub-frame of physical layer frame of BS_BS(user terminal under BS coverage) or RS, UL_BSFor uplink sub-frame of physical layer frame of BS, by SS/MS_BSOr RS to BS, SS/MS_BS、RThe second set of wireless transceiver of S keeps receiving and dispatching frame synchronization with BS; DL_RSDownlink subframe of physical layer frame for RS from BS to SS/MS_RS(user terminal under RS coverage) or RS, UL_RSFor uplink sub-frame of physical layer frame of RS, by SS/MS_RSOr RS to BS, SS/MS_RSAnd the first set of wireless transceivers of the RS keep the frame synchronization of the receiving and sending.

Moreover, the BS, the RS and the SS/MS in the system realize relay communication based on OFDM (orthogonal frequency division multiplexing) technology.

The simplified relay communication mode of RS, BS and MS/SS provided by the invention is shown in figure 7. In the simplified relay communication mode, the BS can communicate with the user terminal (i.e., SS/MS) in the RS coverage area_RS) And (4) direct communication. In fig. 7, the RS needs two sets of FDD transceivers: the first set of transmitter TX1 operates at frequency f1, and the receiver RX1 operates at frequency f 2; the second set of transmitter TX2 operates at frequency f2 and the receiver RX2 operates at frequency f 1. DL_BSFrom BS to SS/MS for downlink sub-frame of physical layer frame of BS_BSOr RS, UL_BSFor uplink sub-frame of physical layer frame of BS, by SS/MS_BSOr RS to BS; SS/MS_BSOr SS/MS_RSThe second set of wireless transceivers of the RS and the BS maintain transceiving frame synchronization. DL_RSDownlink subframe of physical layer frame for RS from BS to SS/MS_RSOr RS, UL_RSFor uplink sub-frame of physical layer frame of RS, by SS/MS_RSOr RS to BS.

Wherein DL_BSThe downlink Broadcast Burst (Broadcast Burst) of (1), such as Preamble, FCH, DL-MAP, UL-MAP, is sent directly from BS to MS/SS_RSNot through RS relay; UL (UL)_BSThe uplink Random Access (Random Access) slot (or called Contention slot), such as the initial Ranging Contention slot and the bandwidth request Contention slot, is directly sent to the BS by the MS/SS without passing through the RS; for DL_BSSuch as data messages or message messages other than DL-MAP, UL-MAP, etc., cannot be sent directly by the BS to the MS/SS_RSMust be relayed through RS; UL (UL)_BSOther time slots upstream, e.g. except for the initial RThe time slots outside the contention time slot of the transmitting and bandwidth requesting cannot be directly transmitted by the MS/SS_RSAnd the information is sent to the BS, and the interaction must be carried out through the RS.

The detailed implementation structure of the two systems will be described below with reference to the accompanying drawings.

The invention provides a BS, RS and SS/MS transfer communication system, which respectively adopts two communication modes: the advanced relay mode and the simplified relay mode are specifically shown in fig. 8.

Wherein, the specific structure of the BS comprises:

a wired transmission processing unit: the communication can be established with the upper-level equipment (such as a base station controller) or with a group of base station equipment respectively, and the information interaction is carried out between the communication and the upper-level equipment or each base station equipment;

TDM/TDMA-FDD radio transceiver: the system is used for carrying out wireless communication with an RS or an SS/MS in a TDM/TDMA-FDD mode, and particularly comprises a TDM-FDD wireless transmitter physical layer processing unit, a TDMA-FDD wireless receiver physical layer processing unit and a TDM-TDMA wireless transceiver data link layer processing unit, wherein:

TDM-FDD radio transmitter physical layer processing unit (frequency f 1): respectively carrying out wireless communication with a TDM-TDMA wireless transceiver data link layer and a TDM-FDD wireless receiver 1 physical layer processing unit in an RS which can be communicated with the TDM-TDMA wireless transceiver data link layer or a TDM-FDD wireless receiver physical layer processing unit in an SS/MS; for the simplified transit mode, this unit is paired with DL_RSThe downlink sub frame head broadcast (such as Preamble, FCH, DL-MAP, UL-MAP) adopts a channel coding and modulation mode (such as binary phase shift keying BPSK) with higher reliability than other sending data, or adopts higher transmitting power than other sending data, and the downlink sub frame head broadcast is directly sent to MS/SS by the BS without being transferred by the RS;

TDMA-FDD radio receiver physical layer processing unit (frequency f 2): respectively carrying out wireless communication with a TDM-TDMA wireless transceiver data link layer and a TDMA-FDD wireless transmitter 1 physical layer processing unit in an RS or a TDMA-FDD wireless transmitter physical layer processing unit in an SS/MS which can be communicated with the TDM-TDMA wireless transceiver data link layer;

TDM-TDMA radio transceiver data link layer processing unit: and after the data from the TDMA-FDD wireless receiver physical layer processing unit or the wire transmission processing unit is processed by the TDM-TDMA wireless transceiver data link layer, the data is forwarded to the wire transmission processing unit or the TDM-FDD wireless transmitter physical layer processing unit.

In the figure, the RS specifically includes:

TDM/TDMA-FDD radio transceivers 1 and 2: the system is used for carrying out wireless communication with a BS or an SS/MS in a TDM/TDMA-FDD mode and particularly comprises a TDM-FDD wireless transmitter 1 and a TDMA-FDD wireless transmitter 2 physical layer processing unit, a TDMA-FDD wireless receiver 1 and a TDM-FDD wireless receiver 2 physical layer processing unit and a TDM-TDMA wireless transceiver data link layer processing unit, wherein the TDM-FDD wireless transmitter 1 and the TDMA-FDD wireless receiver 1 physical layer processing unit form a first TDM/TDMA-FDD wireless transceiver, and the TDMA-FDD wireless transmitter 2 and the TDM-FDD wireless receiver 2 physical layer processing unit form a second TDM/TDMA-FDD wireless transceiver. Wherein:

TDMA-FDD radio transmitter 2 physical layer processing unit (frequency f2), i.e. the second TDMA-FDD radio transmitter physical layer processing unit: respectively carrying out wireless communication with a TDM-TDMA wireless transceiver data link layer and a TDMA-FDD wireless receiver physical layer processing unit in a BS (base station) which can be communicated with the TDM-TDMA wireless transceiver data link layer;

TDM-FDD radio transmitter 1 physical layer processing unit (frequency f1), i.e. the first TDM-FDD radio transmitter physical layer processing unit: respectively carrying out wireless communication with a TDM-TDMA wireless transceiver data link layer and a TDM-FDD wireless receiver physical layer processing unit in an SS/MS which can be communicated with the TDM-TDMA wireless transceiver data link layer;

TDM-FDD radio receiver 2 physical layer processing unit (frequency f1), i.e. the second TDMA-FDD radio receiver physical layer processing unit: respectively carrying out wireless communication with a TDM-FDD wireless transmitter physical layer processing unit in a TDM-TDMA wireless transceiver data link layer and a BS which can be communicated with the TDM-TDMA wireless transceiver data link layer;

TDMA-FDD radio receiver 1 physical layer processing unit (frequency f2), i.e. the first TDMA-FDD radio receiver physical layer processing unit: respectively carrying out wireless communication with a TDM-TDMA wireless transceiver data link layer and a TDMA-FDD wireless transmitter physical layer processing unit in an SS/MS which can be communicated with the TDM-TDMA wireless transceiver data link layer;

TDM-TDMA radio transceiver data link layer processing unit: the data from the TDM-FDD radio receiver 1 and/or the TDMA-FDD radio receiver 2 physical layer processing unit is subjected to TDM-TDMA radio transceiver data link layer data processing, and then forwarded to the TDM-FDD radio transmitter 1 and/or the TDMA-FDD radio transmitter 2 physical layer processing unit.

In the figure, the SS/MS specifically includes:

TDM/TDMA-FDD radio transceiver: the system is used for carrying out wireless communication with an RS or a BS in a TDM/TDMA-FDD mode and comprises a TDMA-FDD wireless transmitter physical layer processing unit, a TDM-FDD wireless receiver physical layer processing unit and a TDM-TDMA wireless transceiver data link layer processing unit.

A TDMA-FDD radio transmitter physical layer processing unit: respectively carrying out wireless communication with a TDM-TDMA wireless transceiver data link layer and a TDMA-FDD wireless receiver 1 physical layer processing unit in RS or a BS TDMA-FDD wireless receiver physical layer processing unit which can be communicated with the TDM-TDMA wireless transceiver data link layer; for the reduced transit mode, the unit is paired with UL_BSThe uplink Random Access (Random Access) slot (or Contention slot), such as the initial Ranging Contention slot and bandwidth request Contention slot, or the initial Access Ranging, periodic Ranging and bandwidth request of the MS/SS via the UL_BSThe Ranging Subchannel adopts a channel coding and modulation mode (such as binary phase shift keying BPSK) with higher reliability than other sending data or adopts higher transmission power than other sending data, and the Ranging Subchannel Ranging and the modulation mode are directly sent to the BS by the MS/SS without being transferred by the RS;

TDM-FDD wireless receiver physical layer processing unit: respectively carrying out wireless communication with a TDM-TDMA wireless transceiver data link layer and a TDM-FDD wireless transmitter 2 physical layer processing unit in RS or a TDM-FDD wireless transmitter physical layer processing unit in BS which can be communicated with the TDM-TDMA wireless transceiver data link layer;

TDM-TDMA radio transceiver data link layer processing unit: the data from TDM-FDD wireless receiver physical layer processing unit or user is processed by TDM-TDMA wireless transceiver data link layer and then forwarded to user or TDMA-FDD wireless transmitter physical layer processing unit.

To ensure reliable communication, physical layer frame structures of the corresponding BS and RS need to be set, and then relay communication in the wireless communication system can be realized based on the corresponding physical layer frame structures.

For this reason, the specific arrangement of the physical layer frame structure in the present invention will be described as follows:

first, to implement relay communication through the RS, the physical frame structures of the corresponding BS and RS are:

1. downlink subframe DL with frequency f1 in physical layer frame structure of BS_BSA DL Relay Zone (downlink Relay Zone) is added in the Relay Zone, and is used for defining a BS downlink Relay data time slot transmitted to the RS by the BS;

for the case of multiple RSs as shown in fig. 4, the multiple RSs share a DLRelay Zone in a TDM (time division multiplexing) manner;

2. opening a DL Relay Zone (Downlink Relay Zone) in a physical layer frame structure of a second set of radio receiver RX2 with the RS frequency of f1, wherein the DL Relay Zone is used for defining a Relay data time slot of the DL Relay Zone of the RS receiving BS;

similarly, for the case of multiple RSs shown in fig. 4, the multiple RSs share a DL RelayZone in a TDM manner;

3. uplink subframe UL of frequency f2 in the physical layer frame structure of BS_BSAdding UL Relay Zone (uplink Relay Zone) in the middle for defining BS uplink Relay data time slot transmitted from RS to BS;

for the case of multiple RSs shown in fig. 4, the multiple RSs share the UL Relay Zone in a TDM manner;

4. opening up an UL Relay Zone (uplink Relay Zone) in a physical layer frame structure of a second set of wireless transmitter TX2 with the frequency f2 of the RS, wherein the UL Relay Zone is used for defining a Relay data time slot of the UL Relay Zone of the BS received by the RS;

for the case of multiple RSs shown in fig. 4, the multiple RSs share the UL Relay Zone in a TDM manner.

In the above physical layer frame structure, the time slots and frequency relationships of the DL Relay Zone of the BS and the DL Relay Zone of the RS RX2 must be in one-to-one correspondence; the time slot and frequency relationships of the UL Relay Zone of the BS and the UL Relay Zone of the RS TX2 must be one-to-one.

In the period corresponding to BS UL Relay Zone, SS/MS_BS、SS/MS_RSNeither can any transmit slot be scheduled, nor can any receive slot be scheduled by the RS, in order to avoid SS/MS_BSTo BS, SS/MS_RSInterference to the BS; during the period corresponding to the BS dl relay Zone, the RS does not arrange any transmission slot to avoid RS-to-RS self interference.

Meanwhile, in order to ensure the relay transmission of the broadcast message, the physical layer frame structure includes:

1. downlink subframe DL with frequency f1 in physical layer frame structure of BS_BSThe DL Relay Zone of (1) opens up a DL Relay broadcast Slot (DL Relay broadcast Slot, abbreviated as DL RB) for defining a downlink Slot broadcasted to the RS by the BS, and broadcasts a DCD (downlink channel descriptor), a UCD (uplink channel descriptor), an FPC (fast power control), and a CLK _ CMP (clock comparison) broadcast message defined by the 802.16 standard;

2. a DL Relay Broadcast RX Slot (downlink Relay Broadcast receiving Slot, abbreviated as DL RB RX) is opened in a DL Relay Zone of a physical layer frame structure of a second set of radio receiver RX2 with RS frequency f1, and is used for defining an RS uplink Slot for receiving a BS downlink Relay Broadcast Slot and receiving DCD, UCD, FPC, CLK CMP Broadcast messages defined by the 802.16 standard.

In the invention, the following settings are also carried out in the physical layer frame structures of the BS and the RS:

1. downlink subframe DL with frequency f1 in physical layer frame structure of BS_BSDefining a DL Interference Slot (downlink Interference Slot) for defining a BS downlink data time Slot of a BS downlink covering a '1 area' and a '2 area';

for the case of multiple RSs shown in fig. 4, the multiple RSs share the DL interference slot in a TDM manner to avoid "RS to SS/MS_RS"interference;

2. downlink sub-frame DL of physical layer frame structure of first set of wireless transmitters TX1 at RS frequency f1_RSA DLInterferenceSlot (downlink interference Slot) is defined, which is used for defining RS downlink data time slots of RS downlink covering '1 area' and '2 area';

for the case of multiple RSs shown in fig. 4, the multiple RSs share the DL interference slot in a TDM manner, so as to avoid RS to SS/MS_RSInterference of (2);

wherein, the DL Interference Slot of BS can not overlap with the DL Interference Slot of RS TX1, avoiding RS to SS/MS_BS"and" BS to SS/MS_RS"interference.

1. downlink subframe DL with frequency f1 in physical layer frame structure of BS_BSDefining a DL Header Slot, defining the starting time set as a downlink subframe, and defining a time Slot for sending user synchronization information and a time Slot for sending indication information so as to indicate the position and the use method profile of each time Slot of a downlink subframe and an uplink subframe of a BS physical layer frame structure;

said synchronization informationAnd the indication information comprises preamble, FCH Burst in original 802.16OFDM (orthogonal frequency division multiplexing) or SC (Single Carrier) frame and one or more downlink bursts (including DL-MAP, UL-MAP), SS/MS (service/Mobile station) appointed by DLFP and following FCH_BSRS and BS keep the frame synchronization of receiving and sending;

2. in the advanced relay mode, a downlink subframe DL of a physical layer frame structure of a first set of wireless transmitters TX1 with the RS frequency f1_RSDefining a DL Header Slot (a downlink subframe head time Slot), setting the DL Header Slot as the starting time of a downlink subframe, and defining a time Slot for sending user synchronization information and a time Slot for sending indication information so as to indicate the position and the use method profile of each time Slot of a downlink subframe and an uplink subframe of an RS physical layer frame structure;

similarly, the synchronization information and the indication information comprise preamble and FCHburst in the original 802.16OFDM (or SC) frame and one or more downlink bursts (including DL-MAP and UL-MAP) appointed by DLFP and immediately following FCH, SS/MS_RSKeeping the frame synchronization of the receiving and sending with the RS;

in the advanced relay mode, the DL Header Slot of the RS TX1 lags behind the DL Header Slot of the BS in time and cannot be synchronized with the DL subframe DL of the physical layer frame structure of the BS_BSThe DL Header Slot, the DL Delay Zone and the DLInterference Slot are overlapped;

in the advanced relay mode, the DL Header Slot of the RS TX1 cannot be temporally matched with the DL subframe of the physical layer frame structure of other RS TX1_RSThe DL Header Slot and the DL Interference Slot are overlapped to avoid the RS to SS/MS_RSInterference of (2); alternatively, if the DL Header Slot of different RS TX1 overlap in time, then full overlap must be guaranteed, strict synchronization must be guaranteed, and the content of the DL Header Slot must be the same, avoiding RS to SS/MS_RSInterference of (2);

3. opening a DL Header RXSlot (Downlink subframe Header receiving time Slot) in a physical layer frame structure of a second set of wireless receivers RX2 with the RS frequency of f1, wherein the DL Header Slot is used for defining the time Slot for receiving the DL Header Slot of the BS; and two sets of FDD transceivers of the RS acquire frequency and/or symbol synchronization according to the preamble and the BS received by the DL Header RX Slot.

It should be noted that: the Slot relationships of the DL Header Slot of the BS and the DL Header RX Slot of RS RX2 must be completely overlapped and strictly synchronized.

1. uplink subframe UL of frequency f2 in the physical layer frame structure of BS_BSDefining an UL Interference Slot (uplink Interference Slot) for defining a BS uplink data Slot of a BS uplink covering a '11 zone' and a '22 zone';

for the case of multiple RSs shown in fig. 4, the multiple RSs share the UL interference slot in a TDM manner, so as to avoid "SS/MS_RSInterference to RS ";

2. uplink sub-frame UL of physical layer frame structure of first set of radio receivers RX1 at RS frequency f2_RSDefining an ULInterferenceSlot (uplink interference Slot) for defining an RS uplink data Slot covering a '33 region' and a '22 region' of the RS uplink;

for the case of multiple RSs shown in fig. 4, the multiple RSs share the UL interference slot in a TDM manner to avoid RS to SS/MS_RSInterference of (2);

the UL Interference Slot of the BS cannot overlap with the UL Interference Slot of the RS RX1 to avoid "SS/MS_BSTo RS 'and' SS/MS_RSInterference to the BS ".

1. uplink subframe UL of frequency f2 in the physical layer frame structure of BS_BSDefining a UL competition Slot (uplink competition Slot), wherein the Slot comprises an initial Ranging competition Slot and a bandwidth request competition Slot in an original 802.16OFDM (or SC) frame;

meanwhile, in the advanced relay mode, an uplink subframe UL of a physical layer frame structure of a first set of wireless receivers RX1 with the RS frequency f2_RSAlso defines the UL competition Slot, the Slot also includes the initial Ranging competition Slot and the bandwidth request competition Slot in the original 802.16OFDM (or SC) frame;

2. opening a UL contentionTX Slot (uplink Contention transmission Slot) in a physical layer frame structure of a second set of wireless transmitter TX2 with the frequency of the RS being f2, wherein the UL contentionTX Slot is used for defining a time Slot which is transmitted by the RS and used for contending a UL Contention Slot of a BS;

the time Slot and frequency relations of the UL content Slot of the BS and the UL content TX Slot of the RS TX2 must be completely overlapped and strictly synchronized; the UL context TX Slot of the RS TX2 cannot overlap with the uplink relay zone and the uplink interference Slot of the uplink subframe of the BS.

In the setting definition process of the physical layer frame structure, the Slot or Zone defined above does not necessarily have to exist every frame except for the DL Header Slot and the UL context Slot.

According to the above-mentioned physical layer frame structure scheme of the present invention, the specific embodiments of the physical layer frame structures of the BS and the RS of the present invention are shown in fig. 8 and fig. 9, where fig. 8 is a schematic diagram of the physical layer frame structures of the BS and the RS under the condition of multiple RSs in the advanced relay mode, and fig. 9 is a schematic diagram of the physical layer frame structures of the BS and the RS under the condition of multiple RSs in the simplified relay mode. Wherein, the sending and receiving frequencies of the RS and the BS are subject to the frequency label of the leftmost end of the frame in the figure.

Black strip-shaped time slots in the BS downlink subframe DLBS and the RS TX1 downlink subframe DLRS are DL Header slots; black strip-shaped time slots in the BS uplink sub-frame ULBS and the RS RX1 uplink sub-frame ULRS are UL content slots; the TX white stripe Slot of the RS TX2 is UL content TX Slot, and the RX white stripe Slot of the RS RX2 is DL Header RXSlot.

BS downlink subframe DL_BSIn which the TX time slot is DL InterfThe interference Slot (BS downlink covers "1 zone" and "2 zone"); BS uplink subframe UL_BSThe RX time Slot in (1) is UL Interference Slot (BS uplink covers "11 region" and "22 region"); RS TX1 downlink subframe DL_RSThe TX time Slot in the middle is DL Interference Slot (RS downlink covers '3 area' and '2 area'); RS RX1 uplink subframe UL_RSThe RX time Slot in (1) is UL Interference Slot (RS uplink covers "33 region" and "22 region").

DL Relay Zone of BS arranges in BS downlink sub-frame DL_BSAfter the DL Header Slot of BS, the UL Relay Zone of the BS is arranged in the BS downlink subframe DL_BSAfter the UL Contention Slot. The time slots and the frequency relations of the DL Relay Zone of the BS and the DL Relay Zone of the RS RX2 are in one-to-one correspondence; the time slots and the frequency relations of the UL Relay Zone of the BS and the UL Relay Zone of the RS TX2 are in one-to-one correspondence; in the period corresponding to BS UL Relay Zone, SS/MS_BS、SS/MS_RSNo transmission time slot is scheduled, and the RS does not schedule any reception time slot; during the period corresponding to the BS DL Relay Zone, the RS does not arrange any transmission slot.

The UL Interference Slot of the BS is not overlapped with the UL Interference Slot of the RS RX1, and the DL Interference Slot of the BS is not overlapped with the DL Interference Slot of the RS TX 1.

For the case of multiple RSs, the multiple RSs share DL Relay Zone (i.e., DL RB, DL Relay R #1, #2 … part), UL Relay Zone (i.e., UL Relay R #1, #2 … part), DL Interference Slot and UL Interference Slot in a TDM manner.

The invention also provides another setting scheme of the physical layer frame structure of the BS and the RS, and the implementation scheme is mainly characterized in that:

1. in the advanced relay mode, the DL Header Slot of the RS TX1 lags behind the DL Header Slot of the BS in time and cannot overlap; the DL Header Slot of RS TX1 must be located in time in the downlink subframe DL of the BS's physical layer frame structure_BSIn the DL Non-Interference Slot of (1);

2. downlink subframe DL with frequency f1 in physical layer frame structure of BS_BSA DL Non-Interference Slot (downlink Interference-free time Slot) is added in the system and is used for defining a BS downlink data time Slot of a BS downlink coverage '1 area';

3. downlink sub-frame DL of physical layer frame structure of first set of wireless transmitters TX1 at RS frequency f1_RSAnd a DLnon-Interference Slot (downlink Interference free time Slot) is added in the RS downlink data Slot for defining the RS downlink data Slot covering the 3 region.

Wherein, the DL Non-Interference Slot of the BS and the DL Non-Interference Slot of the RS can be overlapped on the time Slot;

3. uplink subframe UL of frequency f2 in the physical layer frame structure of BS_BSIncreasing a UL Non-Interference Slot (uplink Interference-free Slot) in the middle, wherein the UL Non-Interference Slot is used for defining a BS uplink data time Slot of a BS uplink covering a '11 zone';

4. uplink sub-frame UL of physical layer frame structure of first set of radio receivers RX1 at RS frequency f2_RSIncreasing an ULnon-Interference Slot (uplink time Slot) for defining an RS uplink data time Slot covering a 33 region;

wherein, the UL Non-Interference Slot of the BS and the UL Non-Interference Slot of the RS RX1 may overlap in time Slot.

According to the above-mentioned physical layer frame structure feature, the specific implementation of the physical layer frame structure of the corresponding BS and RS is as shown in fig. 11, that is, relay communication in the advanced relay mode. In fig. 11, the transmission and reception frequencies of the RS and BS are denoted by the frequency (f1 or f2) at the leftmost end of the frame.

BS downlink subframe DL_BSAnd RS TX1 downlink subframe DL_RSThe middle black strip-shaped time Slot is a DL Header Slot; BS uplink subframe UL_BSAnd RS RX1 uplink subframe UL_RSThe black strip-shaped time Slot in the middle is a UL content Slot; when the TX white stripe of RS TX2 is UL content TX Slot, and the RX white stripe of RS RX2The gap is DL Header RXSlot.

For relay communication in the simplified mode, the RSTX1 downlink subframe DL in fig. 11_RSDL Header Slot and RS RX1 uplink sub-frame UL_RSThe UL Contention Slot of (a) does not exist and the rest is substantially similar.

BS downlink subframe DL_BSThe TX1 time Slot in the middle is DL Non-Interference Slot (BS downlink covers '1 area'), and the TX time Slot is DL Interference Slot (BS downlink covers '1 area' and '2 area'); BS uplink subframe UL_BSThe RX1 timeslot in (1) is UL Non-Interference Slot (BS uplink coverage "11 region"), and the RX timeslot is UL Interference Slot (BS uplink coverage "11 region" and "22 region"); RS TX1 downlink subframe DL_RSThe TX3 time Slot in the middle is DL Non-Interference Slot (RS downlink covers '3 area'), and the TX time Slot is DL Interference Slot (RS downlink covers '3 area' and '2 area'); RS RX1 uplink subframe UL_RSThe RX3 time Slot in (a) is UL Non-Interference Slot (RS uplink covers "33 region"), and the RX time Slot is UL Interference Slot (RS uplink covers "33 region" and "22 region").

DL Relay Zone of BS arranges in BS downlink sub-frame DL_BSAfter the DL Header Slot of BS, the UL Relay Zone of the BS is arranged in the BS downlink subframe DL_BSAfter the UL Contention Slot. The time slots and the frequency relations of the DL Relay Zone of the BS and the DL Relay Zone of the RS RX2 are in one-to-one correspondence; the time slots and frequency relations of the UL Relay Zone of the BS and the UL Relay Zone of the RS TX2 are in one-to-one correspondence.

In addition, in the period corresponding to BS UL Relay Zone, SS/MS_BS、SS/MS_RSNo transmission time slot is scheduled, and the RS does not schedule any reception time slot; during the period corresponding to the BS DL Relay Zone, the RS does not arrange any transmission slot.

The present invention also provides a third implementation scheme of the physical layer frame structure of the BS and RS, which is different from the second scheme described above in that:

1. downlink subframe DL with frequency f1 in physical layer frame structure of BS_BSA DL Interference Slot (downlink Interference Slot) is defined in the BS, which is used to define a BS downlink data Slot of a BS downlink coverage "2 zone", that is, to define an area covered by the BS only;

for the case of multiple RSs shown in fig. 4, the multiple RSs share the DL interference slot in a TDM manner, so as to avoid "RS to SS/MS_RS"interference;

2. downlink sub-frame DL of physical layer frame structure of first set of wireless transmitters TX1 at RS frequency f1_RSA DLInterference Slot (downlink interference Slot) is defined, which is used for defining an RS downlink data Slot that RS downlink covers a "2 region", that is, for defining an area covered only by RS;

3. uplink subframe UL of frequency f2 in the physical layer frame structure of BS_BSDefining an UL Interference Slot (uplink Interference Slot) for defining a BS uplink data Slot of a BS uplink covering a "22 zone", that is, for defining an area covered by the BS only;

4. uplink sub-frame UL of physical layer frame structure of first set of radio receivers RX1 at RS frequency f2_RSDefining a ul interference Slot (uplink interference Slot) for defining an RS uplink data Slot covering a "22 region" by an RS uplink, that is, for defining a region covered only by the RS;

for the case of multiple RSs as shown in FIG. 4, soThe multiple RSs share the UL InterferenceSlot in a TDM mode, thereby avoiding' SS/MS_RSInterference to RS ".

According to the third implementation scheme of the physical layer frame structure, a specific embodiment of the physical layer frame structure of the BS and the RS according to the present invention is shown in fig. 12, that is, an advanced relay communication mode. Wherein, the sending and receiving frequencies of the RS and the BS are subject to the frequency label of the leftmost end of the frame in the figure.

BS downlink subframe DL_BSAnd RS TX1 downlink subframe DL_RSThe middle black strip-shaped time Slot is a DL Header Slot; BS uplink subframe UL_BSAnd RS RX1 uplink subframe UL_RSThe black strip-shaped time Slot in the middle is a UL content Slot; the TX white Slot of RS TX2 is UL context TX Slot, and the RX white Slot of RS RX2 is DL Header RXSlot.

For the simplified mode, RS TX1 downlink subframe DL in fig. 12_RSDL Header Slot and RS RX1 uplink sub-frame UL_RSThe UL Contention Slot of (1) does not exist, and the rest is similar.

BS downlink subframe DL_BSThe TX1 time Slot in the middle is DL Non-Interference Slot (BS downlink coverage "1 zone"), and the TX2 time Slot is DL Interference Slot (BS downlink coverage "2 zone"); BS uplink subframe UL_BSThe RX1 time Slot in (1) is UL Non-Interference Slot (BS uplink coverage "11 region"), and the RX2 time Slot is UL Interference Slot (BS uplink coverage "22 region"); RS TX1 downlink subframe DL_RSThe TX3 time Slot is DL Non-Interference Slot (RS downlink covers '3 area'), and the TX2 time Slot is DL Interference Slot (RS downlink covers '2 area'); RS RX1 uplink subframe UL_RSThe "RX 3 time Slot" in (1) is UL Non-Interference Slot (RS uplink coverage "33 region"), and the RX2 time Slot is UL Interference Slot (RS uplink coverage "22 region").

DL Relay Zone of BS arranges in BS downlink sub-frame DL_BSAfter the DL Header Slot of BS, the UL Relay Zone of the BS is arranged in the BS downlink subframe DL_BSAfter the UL Contention Slot. Of BSThe time slots and the frequency relations of the DL Relay Zone and the DL Relay Zone of the RS RX2 are in one-to-one correspondence; the time slots and frequency relations of the UL Relay Zone of the BS and the UL Relay Zone of the RS TX2 are in one-to-one correspondence.

In the period corresponding to BS UL Relay Zone, SS/MS_BS、SS/MS_RSNo transmission time slot is scheduled, and the RS does not schedule any reception time slot; during the period corresponding to the BS DL Relay Zone, the RS does not arrange any transmission slot.

The UL Interference Slot of the BS is not overlapped with the UL Interference Slot of the RS RX1, and the DL Interference Slot of the BS is not overlapped with the DL Interference Slot of the RS TX 1. The DL Non-Interference Slot of the BS and the DL Non-Interference Slot of the RS TX1 overlap as much as possible in the time Slot. The UL Non-Interference Slot of the BS and the UL Non-Interference Slot of the RS RX1 overlap as much as possible in the time Slot.

The invention also provides a corresponding TDM/TDMA-FDD transfer communication processing flow, which specifically comprises a downlink transfer communication processing process from the BS to the user terminal and an uplink transfer communication processing process from the user terminal to the BS, and the corresponding communication processing processes are respectively explained below.

First, a Downlink relay communication processing procedure from a BS to a user terminal is described, where the Downlink relay communication processing procedure includes a first stage processing procedure from the BS to an RS and a second stage processing procedure from the RS to the user terminal, where:

in the first stage (BS- > RS) processing procedure, the advanced relay mode and the simplified relay mode employ the same processing procedure, which specifically includes:

1. BS at frequency f1 downlink subframe DL_BSSending a preamble in the DL Header of (1);

2. RS #1 receives BS downlink subframe DL through RS RX2 DL Header RX Slot with frequency f1_BSThe preamble in the DL Header realizes the synchronization with the BS;

3. BS at frequency f1 downlink subframe DL_BSSending FCH, DL-MAP and UL-MAP information after the preamble of the DL Header;

4. RS #1 receives the DL subframe through the DL Header RX Slot with RS RX2 frequency f1_BSObtaining the time slot positions and the use method (profile) information of each burst of the downlink and the uplink of the BS by the FCH, the DL-MAP and the UL-MAP of the DL Header;

5. BS uses downlink subframe DL with frequency f1_BSThe DL Relay broadcast of DL Relay Zone sends the message of the broadcast message;

6. BS at frequency f1 downlink subframe DL_BSThe DL Relay RS #1 of the DL Relay Zone sends downlink Relay communication data traffic data to RS # 1;

7. RS #1 receives BS downlink subframe DL through RS RX2 DL RB with frequency f1_BSThe broadcast message in the DL Relay broadcast of the DL Relay Zone in (1) may include a message that needs to be relayed to the broadcast in RS # 1;

8. RS #1 receives BS downlink subframe DL through RS RX2 DL Relay Zone with frequency f1_BSThe downlink Relay communication data in the DL Relay RS #1 of the DL Relay Zone;

during the second stage (RS- > MS/SS) of the process:

(1) in the advanced transit mode, the corresponding processing includes:

1. RS #1TX1 in downlink subframe DL_RSSending a preamble in a DL Header with the frequency of f 1;

2. MS/SS receives RS #1TX1 downlink subframe DL_RSThe preamble in the DL Header of the system is synchronized with the RS # 1;

3. RS #1TX1 in downlink subframe DL_RSPreamble of DL Header with frequency f1 is followed by FCH, DL-MAP, UL-MAP, of RS #1DL-MAP, UL-MAP information has been sent by the BS to RS #1 in step 6 described in the first stage above;

4. MS/SS receives RS #1TX1 downlink subframe DL_RSObtaining the sub-channel and OFDMA symbol position and use method (profile) information of each burst of RS #1 downlink and uplink by the FCH, DL-MAP and UL-MAP of the DL Header;

5. RS #1TX1 in downlink subframe DL_RSIn the time slots except for DL Header and DL Relay Zone, downlink Relay communication data is sent to the MS/SS at frequency f1, and similarly, the Relay communication data has been sent to RS #1TX1 by the BS in step 6of the first stage;

6. MS/SS receives RS #1TX1 downlink subframe DL from corresponding time slot_RSThe downlink relay communication data traffic data in (1).

(2) In the simplified transit mode, the corresponding communication processing procedure includes:

1. MS/SS receives BS downlink subframe DL_BSThe preamble in the DL Header is synchronized with the BS;

2. MS/SS receives BS downlink subframe DL_BSObtaining the time slot, sub-channel and/or OFDMA symbol position and use method (profile) information of each burst of the BS and RS #1 downlink and uplink;

3. RS #1TX1 in downlink subframe DL_RSIn the time slot other than DL Header, DL Relay Zone, downlink Relay communication data, which has been transmitted by the BS to RS #1TX1 in step 6of the first stage, is transmitted to the MS/SS at frequency f 1;

4. MS/SS receives RS #1TX1 downlink subframe DL from corresponding time slot_RSThe downlink relay communication data traffic data in (1).

The Uplink relay communication processing procedure in the Uplink also includes a first-stage processing procedure from the user terminal to the RS, and a second-stage processing procedure from the RS to the BS.

In a first stage (MS/SS- > RS) relay communication processing procedure, specifically, relay communication in an advanced relay mode and relay communication in a simplified mode are included, where:

(1) in the advanced transit mode, the corresponding communication processing procedure includes:

1. MS/SS receives RS #1TX1 downlink subframe DL_RSObtaining time slot positions and use method (profile) information of each burst of RS #1TX1 downlink and uplink by FCH, DL-MAP and UL-MAP of DL Header with frequency of f 1;

2. uplink sub-frame UL of MS/SS at RS #1RX1_RSIn the time slot except the period corresponding to the BS UL Relay Zone, transmit the uplink communication data traffic data to RS #1 at frequency f 2;

3. RS #1RX1 receives MS/SS uplink sub-frame UL from respective slot at frequency f2_RSThe uplink communication data trafficdata in (1);

1. MS/SS receives BS downlink subframe DL_BSFCH, DL-MAP and UL-MAP of DL Header with frequency f1, obtaining time slot positions and use method (profile) information of each burst of downlink and uplink of a first set of wireless transmitters of BS and RS # 1;

2. uplink sub-frame UL of MS/SS at RS #1RX1_RSIn the time slot except for the period corresponding to the BS UL Relay Zone, the uplink communication data traffi c data is transmitted to the RS #1 at the frequency f 2;

in the relay communication processing procedure of the second stage (RS- > BS), the corresponding communication processing procedures in the advanced relay mode and the simplified relay mode are the same, and the method specifically includes:

1. RS #1RX2 through RS uplink sub-frame UL_RSDL Header RX Slot reception BS Downlink subframe DL with medium frequency f1_BSObtaining the sub-channel and OFDMA symbol position and use method (profile) information of each burst of the downlink and uplink of the BS by the FCH, DL-MAP and UL-MAP of the DL Header;

2. RS #1TX2 at frequency f2 in RS downlink subframe DL_RSIn UL Relay RS #1 of the UL Relay Zone, transmitting uplink Relay communication data to the BS, where the Relay communication has been transmitted to RS #1 by the BS in step 2 of the above uplink Relay communication processing procedure;

3. the BS receives the uplink Relay communication data traffic data in S5 in UL Relay RS #1 of UL Relay Zone of the uplink subframe ULBS of frequency f 2.

In the relay communication process, the BS, the RS and the SS/MS realize relay communication based on the OFDM technology so as to improve the anti-multipath interference performance of the communication system.

In summary, the present invention defines the physical layer frame structures of the BS and the RS, so that the OFDM (or SC) wireless advanced relay mode and the wireless simplified relay mode can be supported; moreover, the invention can also effectively ensure the communication between the RS and the BS and between the MS/SS in an FDD/TDM/TDMA mode, and can also effectively interfere possibly existing in various communication conditions.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A method for realizing wireless transit communication based on TDM/TDMA-FDD is characterized by comprising the following steps:

2. The method according to claim 1, wherein the downlink relay zone of the BS corresponds to the time slot and frequency relationship of the downlink relay zone of the RS second TDM/TDMA-FDD wireless transceiver, the uplink relay zone of the BS corresponds to the time slot and frequency relationship of the uplink relay zone of the RS second TDM/TDMA-FDD wireless transceiver, and the RS does not arrange any transmission time slot and does not arrange any reception time slot during the period corresponding to the uplink relay zone of the BS.

3. The method for implementing wireless relay communication based on TDM/TDMA-FDD according to claim 1 or 2, wherein said step A comprises:

4. The method for implementing wireless relay communication based on TDM/TDMA-FDD according to claim 1, wherein said step A comprises:

5. The method for implementing wireless relay communication based on TDM/TDMA-FDD according to claim 4, wherein said step A further comprises:

6. The method for implementing wireless relay communication based on TDM/TDMA-FDD according to claim 1, wherein said step A comprises:

7. The method for implementing wireless relay communication based on TDM/TDMA-FDD according to claim 1, wherein said step A comprises:

8. The method for implementing wireless relay communication based on TDM/TDMA-FDD according to claim 7, wherein said step A comprises:

9. The method for implementing wireless relay communication based on TDM/TDMA-FDD according to claim 7, wherein said step A comprises:

or,

10. The method for implementing wireless relay communication based on TDM/TDMA-FDD according to claim 6, wherein said step A comprises:

11. The method for implementing wireless relay communication based on TDM/TDMA-FDD according to claim 1, wherein said step A comprises:

12. The method according to claim 11, wherein the uplink interference time slot set in the uplink subframe of the BS and the uplink interference time slot set in the uplink subframe of the first TDM/TDMA-FDD radio transceiver of the RS do not overlap each other in time.

13. The method for implementing wireless relay communication based on TDM/TDMA-FDD according to claim 1, wherein said step A comprises:

14. The method for implementing wireless relay communication based on TDM/TDMA-FDD according to claim 1, wherein said step A further comprises:

15. The method for implementing wireless relay communication based on TDM/TDMA-FDD according to claim 13, wherein said step a further comprises:

16. The method according to claim 15, wherein the time slot and frequency relationship between the contention based uplink timeslot of the BS and the contention based uplink transmission timeslot of the RS are completely overlapped and synchronized, and the contention based uplink transmission timeslot of the RS cannot overlap with the uplink relay zone and the uplink interference timeslot of the uplink subframe of the BS.

17. The method for implementing wireless relay communication based on TDM/TDMA-FDD according to any of claims 1, 2, 4, 5 and 11 to 14, wherein said step a comprises:

18. The method for implementing wireless relay communication based on TDM/TDMA-FDD according to claim 1, wherein said step A comprises:

19. The method for implementing wireless relay communication based on TDM/TDMA-FDD according to claim 18, wherein said step a comprises:

20. The method according to claim 7 or 18, wherein the downlink sub-frame header time slot of the RS first TDM/TDMA-FDD radio transceiver is located in time within the downlink interference-free time slot of the downlink sub-frame of the physical layer frame structure of the BS.

21. The method for implementing wireless relay communication based on TDM/TDMA-FDD according to any of claims 1, 2, 4 to 7, 10 to 14 and 18, wherein said step a comprises:

the downlink sub-frame header time slot and the uplink contention time slot are set to exist in each frame of the BS and the RS, and the downlink relay zone, the uplink relay zone, the downlink interference time slot, the uplink contention transmission time slot of the RS, the downlink non-interference time slot and the uplink non-interference time slot are not set to exist in each frame.

22. The method for implementing wireless relay communication based on TDM/TDMA-FDD according to any of claims 1, 2, 4 to 7, 10 to 14 and 18, wherein said step B comprises:

23. A method for realizing wireless transit communication based on TDM/TDMA-FDD is characterized by comprising the following steps:

downlink communication process from BS to user terminal:

uplink communication process from user terminal to BS:

24. The method for implementing wireless relay communication based on TDM/TDMA-FDD according to claim 23, wherein the downlink communication procedure from the BS to the user terminal further comprises:

25. The method for implementing wireless relay communication based on TDM/TDMA-FDD according to claim 24, wherein after transmitting the preamble, further comprising:

26. The method for implementing wireless relay communication according to claim 23, 24 or 25, wherein said step C further comprises:

27. The method for implementing wireless relay communication based on TDM/TDMA-FDD according to claim 23, wherein the downlink communication procedure from the BS to the user terminal further comprises:

28. The method for implementing wireless relay communication based on TDM/TDMA-FDD according to claim 23, wherein the uplink communication from the user terminal to the BS further comprises:

29. The method for implementing wireless relay communication based on TDM/TDMA-FDD according to claim 23, 24, 25, 27 or 28 wherein said relay communication between BS, RS and user terminal is further based on orthogonal frequency division multiplexing OFDM.

30. A relay station, characterized in that a relay station RS is provided with interfaces for communication with a BS and a user terminal, respectively, and comprises a first TDM/TDM access TDMA-FDD radio transceiver and a second TDM/TDMA-FDD radio transceiver in said RS, wherein the first TDM/TDMA-FDD radio transceiver in the RS comprises TDM-FDD radio transmitter physical layer units and TDMA-FDD radio receiver physical layer units corresponding to and maintaining synchronization of the transceiving frames with the TDM-FDD radio receiver physical layer units and TDMA-FDD radio transmitter physical layer units in the user terminal, and the second TDM/TDMA-FDD transceiver in the RS comprises TDMA-FDD radio transmitter physical layer units and TDM-FDD radio receiver physical layer units corresponding to and maintaining synchronization of the TDMA-FDD radio receiver physical layer units and TDM-FDD radio transmitter physical layer units in the BS Sending frame synchronization; the RS is also provided with a TDM-TDMA wireless transceiver data link layer unit.

31. A method for realizing wireless transit communication based on TDM/TDMA-FDD is characterized by comprising the following steps:

32. The method for implementing wireless relay communication based on TDM/TDMA-FDD according to claim 31, wherein the process of defining the time slot for information interaction between the BS and the RS comprises:

33. The method for implementing wireless relay communication based on TDM/TDMA-FDD according to claim 31, wherein the process of defining the time slot for information interaction between the BS and the RS comprises:

34. The method for implementing wireless relay communication based on TDM/TDMA-FDD according to claim 31, wherein the process of defining the time slot for information interaction between the BS and the RS further comprises:

35. The method of claim 33, wherein the RS downlink subframe header timeslot lags behind the BS downlink subframe header timeslot in time, and the RS downlink subframe header timeslot cannot overlap with the BS downlink subframe header timeslot, the downlink relay zone and the downlink interference timeslot.

36. The method for implementing wireless relay communication based on TDM/TDMA-FDD according to claim 33, wherein the method further comprises:

or,

37. The method for implementing wireless relay communication based on TDM/TDMA-FDD according to claim 31, wherein the process of defining the time slot for information interaction between the BS and the RS comprises:

38. The method for implementing wireless relay communication based on TDM/TDMA-FDD according to claim 31, wherein the process of defining the time slot for information interaction between the BS and the RS further comprises:

39. The method for implementing wireless relay communication based on TDM/TDMA-FDD according to claim 38, wherein the method further comprises:

40. The method for implementing wireless relay communication based on TDM/TDMA-FDD according to claim 31, wherein the method further comprises:

41. A method for realizing wireless transit communication based on TDM/TDMA-FDD is characterized by comprising the following steps:

or,

42. The method for implementing wireless relay communication based on TDM/TDMA-FDD according to claim 41, wherein said method further comprises:

43. The method for implementing wireless relay communication based on TDM/TDMA-FDD according to claim 41, wherein said method further comprises: