CN1960207A - Radio transfer communication system and method based on admixture of FDD and TDD - Google Patents

Abstract

The invention relates to a wireless relay communication system and method. The present invention mainly includes a BS (base station), an RS (transfer station) and a user terminal. The RS is respectively provided with an interface for communicating with the BS and the user terminal, and the RS includes two TDDs ( time division duplex) wireless transmitter physical layer unit, and two TDD wireless receiver physical layer units working on corresponding different frequencies, the BS and the user terminal are respectively provided with two kinds of frequency values corresponding to those used in the RS FDD wireless transmitter physical layer unit and FDD wireless receiver physical layer unit. At the same time, the present invention also sets the physical layer frame structure of the corresponding BS and RS, so that wireless relay communication can be performed between the BS and RS based on the physical layer frame. The realization of the present invention can effectively guarantee the transfer communication between RS, BS and MS/SS in FDD-TDD hybrid/TDM/TDMA mode, and can effectively avoid various possible interferences.

Description

Wireless relay communication system and method based on FDD and TDD hybrid

technical field

The invention relates to the technical field of wireless communication, in particular to a wireless relay communication system and method based on FDD and TDD mixing.

Background technique

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. Among them, 802.16-2004 only defines two kinds of network elements, BS (base station) and SS (subscriber station); 802.16e also defines only two kinds of network elements, BS and MSS (mobile subscriber station), the SS/MSS may be collectively referred to as a user terminal.

At present, 802.16 Multihop Relay SG (802.16 Multihop Relay Research Group) only proposed the concept of RS relay station for WiMAX (Global Interoperability of Microwave Access). A relay communication entity to extend the coverage of the BS or increase the throughput of the subscriber station.

In a channel (Channel) of OFDM (orthogonal frequency division multiplexing) or OFDMA (orthogonal frequency division multiplexing access) system (such as 802.16 system), its OFDM or OFDMA symbol is composed of subcarriers (Subcarrier), subcarriers The number of determines the number of FFT (fast Fourier transform) points. Subcarriers constituting a subchannel (Subchannel) may or may not be adjacent, as shown in FIG. 1 , which shows an example of adjacent subcarriers.

According to the type of transmitted data, the subcarriers are as follows:

1. Data subcarriers: subcarriers used to transmit data;

2. Pilot subcarrier: subcarrier used for pilot frequency;

3. Empty subcarriers: subcarriers that are not used to transmit any number, including guard bands (Guard Band) and DC subcarriers (DC Subcarrier).

In OFDM or OFDMA systems, different users divide the uplink FFT space, and each user transmits on one or more sub-channels. The division of sub-channels is an FDMA method. All effective sub-carriers are divided into several sub-carrier sets, and each sub-carrier set is called a sub-channel (subchannel).

In a communication system, there are three main methods for dividing sub-channels:

The first is to divide the carrier into continuous groups, which is the simplest to implement, and the interference of adjacent sub-channels is small, but the obtained frequency diversity effect is poor.

The second is that carriers of different sub-channels are interleaved in a regular manner. This frequency diversity effect is better, but the system is more sensitive to inter-sub-channel interference.

The third is an improvement on the second, that is, carriers of different sub-channels are interleaved in a pseudo-random manner, and different base stations use different sequence change codes to reduce interference between base stations.

In the 802.16 standard, for the licensed frequency band, the duplex mode can be FDD (frequency division duplex) and TDD (time division duplex), the SS of the FDD mode can be half-duplex FDD, and for the license-free frequency band, the duplex mode It can only be TDD.

The frame structure of 802.16OFDMA (or SOFDMA) under FDD is shown in Figure 2. In 802.16 OFDMA (or SOFDMA) mode, a PHY (physical layer) burst (burst) in OFDMA (or SOFDMA) is assigned a group of adjacent sub-channels and a group of OFDMA symbols (symbol).

The data transmitted on the physical channel is transmitted in the format of frame (Frame). Each frame includes a downlink subframe (DL subframe, abbreviated as DL in FIG. 2 ) and an uplink subframe (UL subframe, abbreviated as DL in FIG. 2 ). In the FDD mode, the downlink subframe and the uplink subframe use different frequencies for transmission, as shown in Figure 2, the DL uses the frequency f1, and the UL uses the frequency f2.

A burst can be assigned to an SS/MSS (or a group of users) in the uplink, and can be sent to the SS/MSS by the BS as a sending unit in the downlink. The initial access ranging Ranging, periodic ranging Ranging, and bandwidth request of the uplink SS are all performed through the Ranging subchannel. A downlink subframe starts with a preamble for physical synchronization; followed by an FCH (Frame Control Header), which is used to specify the profile and length of one or more downlink Bursts following the FCH. Then there are DL-MAP (downlink mapping table) and UL-MAP (uplink mapping table) messages, the DL-MAP is used to indicate the sub-channel and OFDMA symbol position and usage method (profile) of each downlink burst, the described The UL-MAP is used to indicate the subchannel and OFDMA symbol position and usage method (profile) of each uplink burst.

Although the above-mentioned OFDM or OFDMA technical structure can meet the communication requirements in the communication system, for the relay communication system including the RS, there is no corresponding technology that can meet the corresponding relay communication requirements.

Contents of the invention

The purpose of the present invention is to provide a wireless relay communication system and method based on FDD and TDD, so that reliable relay communication function can be realized in the relay communication system including RS, so as to effectively expand the coverage of BS.

The purpose of the present invention is achieved through the following technical solutions:

The present invention provides a wireless transfer communication system, which includes a base station BS, a transfer station RS, and a user terminal. The RS includes a first TDD wireless transceiver and a second TDD wireless transceiver and provides communication with the BS and the user terminal respectively. interface; the first TDD wireless transceiver in the RS includes a TDD wireless receiver physical layer unit and a TDD wireless transmitter physical layer unit using the same first frequency, and is connected with the FDD wireless transmitter physical layer unit in the BS, And the FDD wireless receiver physical layer unit in the user terminal corresponds to and maintains frame synchronization for sending and receiving; the second TDD wireless transceiver in the RS includes a TDD wireless receiver physical layer unit and a TDD wireless transmitter using the same second frequency The physical unit corresponds to the physical layer unit of the FDD wireless transmitter in the user terminal and the physical layer unit of the FDD wireless receiver in the BS and maintains frame synchronization for sending and receiving.

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

The BS and the user terminal are respectively provided with corresponding FDD wireless transceiver data link layer units, and the RS is provided with a TDD wireless transceiver data link layer unit.

The BS also provides an interface for communicating with the user terminal. The BS converts the preamble Preamble, the frame control header FCH, and the downlink mapping table DL-MAP by using a predetermined channel coding and modulation method, or using a predetermined transmission power value. and the uplink mapping table UL-MAP information are directly sent to the user terminal through this interface.

The present invention also provides a method for realizing wireless relay communication, including:

A. In the downlink subframe and uplink subframe of the physical layer frame structure of the BS based on FDD, the downlink transit area and the uplink transit area are respectively set in the time division multiplexing TDM mode, and the physical layer frame of the first TDD wireless transceiver of the RS The uplink subframe of the structure and the downlink subframe of the physical layer frame structure of the second TDD wireless transceiver are respectively provided with a downlink transfer area and an uplink transfer area, which are used to define subchannels and OFDMA symbol combinations for information exchange between the BS and the RS;

B. The uplink and downlink physical layer frames of the BS and RS based on the above settings are used between the BS, the RS and the user terminal to perform wireless relay communication in a FDD/TDD hybrid manner.

In the present invention, during the period corresponding to the uplink transit area of the BS, the user terminals under the coverage of the BS and the RS do not arrange any combination of sending subchannels and OFDMA symbols, and the RS does not arrange any combination of receiving subchannels and OFDMA symbols.

When there are multiple RSs, multiple RSs share the downlink or uplink transit area through different combinations of subchannels and OFDMA symbols, and different RSs only receive or send data in the corresponding combination of subchannels and OFDMA symbols in the downlink transit area .

Described step A comprises:

In the downlink transit area in the uplink subframe of the physical layer frame structure of the first TDD wireless transceiver of the BS and the RS, respectively set the downlink transit broadcast subchannel for defining the downlink subchannel and the OFDMA symbol combination that the BS broadcasts to the RS, And the RS receives the uplink subchannel and OFDMA symbol combination of the BS downlink relay broadcast subchannel, which is used to broadcast the downlink channel descriptor DCD, uplink channel descriptor UCD, FPC (fast power control) or CLK_CMP (clock comparison) between the BS and the RS broadcast message.

Described step A comprises:

The relay ranging subchannel is set in the downlink subframe of the physical layer frame structure of the BS, which is used to define the BS relay ranging receiving subchannel and OFDMA symbol combination for initial access ranging, periodic ranging, and bandwidth request of the RS;

Set the relay ranging sending subchannel in the downlink subframe of the physical layer frame structure of the second TDD wireless transceiver of the RS, which is used to define the initial access ranging of the RS, the periodic ranging, and the BS relay ranging of the bandwidth request Subchannel and OFDMA symbol combinations are transmitted.

The relay ranging sub-channel of the BS and the relay ranging sending sub-channel of the RS are set in a one-to-one correspondence and need to be kept in sync.

Described step A comprises:

Set the downlink subframe header in the downlink subframe of the physical layer frame structure of the BS, and set it at the beginning of the downlink subframe to define the subchannel and OFDMA symbol combination for sending user synchronization information and the subchannel and OFDMA for sending indication information The symbol combination is used to indicate the position and usage method of each subchannel and OFDMA symbol of the downlink subframe and uplink subframe of the BS physical layer frame structure.

Described step A comprises:

When the BS cannot directly communicate with the user terminal under the coverage of the RS, set it in the downlink subframe of the physical layer frame structure of the first TDD wireless transceiver of the RS and the frequency used by the user terminal FDD wireless receiver physical layer unit The downlink subframe header, set at the beginning of the downlink subframe, is used to define the combination of subchannels and OFDMA symbols for sending user synchronization information and the combination of subchannels and OFDMA symbols for sending indication information, and is used to indicate the frame structure of the RS physical layer. The positions and usage methods of subchannels and OFDMA symbols in frames and uplink subframes.

Described step A comprises:

The head of the downlink subframe of the RS lags behind the head of the downlink subframe of the BS in time, and during the head of the downlink subframe of the RS, the downlink subframe of the BS cannot arrange any combination of sending subchannels and OFDMA symbols.

Described step A comprises:

When there are multiple RSs, during the downlink subframe header of the RS, the downlink subframes of other RSs cannot arrange any transmission subchannels and OFDMA symbols,

or

When there are multiple RSs, during the downlink sub-frame headers of the RSs, the downlink frame headers of different RSs overlap in time, and complete overlapping synchronization is required, and the content of the downlink frame headers must be the same.

Described step A comprises:

Set the downlink subframe header reception in the uplink subframe of the physical layer frame structure of the first TDD wireless transceiver of the RS, which is used to define the subchannel and OFDMA symbol combination of the downlink subframe header of the receiving BS, and the downlink subframe of the RS is required The frame header reception needs to correspond one-to-one with the downlink subframe header of the BS, and keep synchronization.

Described step A comprises:

The ranging subchannel is set in the uplink subframe of the physical frame structure of the BS, which is used to define the BS ranging receiving subchannel and OFDMA symbol combination for initial access ranging, periodic ranging, and bandwidth request of the user terminal.

Described step A also includes:

When the BS cannot directly communicate with the user terminal under the coverage of the RS, the ranging sub-channel is set in the uplink subframe of the physical layer frame structure of the second TDD wireless transceiver of the RS, which is used to define the initial access ranging of the user terminal , Periodic ranging, RS ranging receiving subchannel and OFDMA symbol combination for bandwidth request.

The downlink subframes of the RS cannot overlap with the uplink subframes of other RSs, and the uplink subframes of the RS cannot overlap with the downlink subframes of other RSs.

Described step A also includes:

In the downlink subframe of the physical layer frame structure of the first TDD wireless transceiver of the BS or RS, except for the downlink subframe header and the downlink transit area of the BS, the BS and different RSs use different subchannels and OFDMA symbols combining the remainder of the shared downlink subframe; and/or

In the uplink subframe of the physical layer frame structure of the second TDD wireless transceiver of the BS or RS, except for the uplink transit area of the BS, the BS and different RSs share the rest of the uplink subframe through different combinations of subchannels and OFDMA symbols part.

Described step A comprises:

The downlink subframe header and the ranging subchannel are set to exist in each frame of the BS and the RS, and the downlink transit area, the uplink transit area, the downlink transit broadcast subchannel, the transit ranging subchannel, and the downlink subframe Header reception is not set to be present in every frame.

Described step B comprises:

The uplink and downlink transit area, downlink transit broadcast subchannel, transit ranging subchannel, downlink subframe header and/or downlink contained in the uplink and downlink physical layer frames of BS, RS and user terminal The subframe header receives and interacts with messages to realize wireless relay communication.

The present invention also provides a method for realizing wireless relay communication, including:

Downlink communication process from BS to user terminal:

C. The BS sends data to the RS in the downlink transit area of the downlink subframe of the BS, and the RS receives the data through the downlink transit area in the uplink subframe of the first TDD wireless transceiver of the RS;

D. The RS sends the data group user terminal in the downlink subframe of the first TDD wireless transceiver of the RS;

Uplink communication process from user terminal to BS:

E. By sending the uplink data to be sent in the uplink subframe of the RS second TDD wireless transceiver by the user terminal, and receiving the data by the RS second TDD wireless transceiver;

F. The RS sends uplink transit data in the uplink transit area of the downlink subframe of the second TDD wireless transceiver of the RS, and the BS receives the transit data in the uplink transit area of the BS's uplink subframe.

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

The first TDD wireless transceivers of the BS and/or the RS respectively transmit a preamble at the first symbol of the header of the downlink subframe corresponding to each downlink subframe, and the RS or the user terminal receiving the preamble is synchronized with the BS or the RS.

In the present invention, after sending the preamble, it also includes:

The first TDD wireless transceiver of the BS and/or RS will also send FCH, DL-MAP and UL-MAP information, and the first TDD wireless transceiver of the RS or the user terminal receiving each information determines each burst according to each information Subchannel and OFDMA symbol location and usage information.

Described step C also includes:

The BS sends a broadcast message to the first TDD wireless transceiver of the RS on the downlink transit broadcast subchannel of the downlink transit area of the BS downlink subframe, and the RS receives the broadcast message through the downlink transit broadcast subchannel in the uplink subframe of the first TDD wireless transceiver of the RS. said news.

In the present invention, the downlink communication process from the BS to the user terminal also includes:

The user terminal receives the preamble in the downlink subframe header of the BS downlink subframe, and synchronizes with the BS;

The user terminal receives the FCH, DL-MAP and UL-MAP information sent by the BS, and obtains the subchannel and OFDMA symbol position and usage information of each burst of the BS and RS.

The described uplink communication process from the user terminal to the BS also includes:

The user terminal receives the FCH, DL-MAP and UL-MAP information of the downlink subframe header of the downlink subframe of the first TDD wireless transceiver of the RS, and determines the subchannel and OFDMA symbol position and usage 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 header of the downlink subframe of the BS, and determines the subchannel and OFDMA symbol position and usage method information of each burst of the BS and the RS;

The RS first TDD wireless transceiver receives the FCH, DL-MAP and UL-MAP information of the downlink subframe header in the BS downlink subframe, and obtains the subchannel and OFDMA symbol position and usage information of each burst of the BS.

As can be seen from the technical solution provided by the present invention above, the present invention defines the physical layer frame structure of BS and RS by introducing a mechanism combining TDM and OFDMA, so as to support OFDMA (or SOFDMA) wireless advanced transfer mode, i.e. MS/SS It can be wirelessly transferred to BS through RS; at the same time, it can also support OFDMA (or SOFDMA) wireless simplified transfer mode, that is, the downlink data message of BS or the message message except DL-MAP and UL-MAP can be transmitted through RS Relay: Other uplink bursts of BS, except initial access Ranging, periodic ranging, and bandwidth request messages of MS/SS, can be relayed through RS.

The realization of the present invention can effectively guarantee the communication between RS, BS and MS/SS in FDD-TDD hybrid/TDM/TDMA mode.

The realization of the present invention can also effectively avoid the following interference that may exist:

1. Avoid interference from "RS to SS/MS _BS " and "BS to SS/MS _RS ";

2. Avoid interference from "SS/MS _BS to BS", SS/MS _BS to RS" and "SS/MS _RS to BS";

3. Avoid "RS to RS" self-interference;

4. Avoid interference from "RS to SS/MS _RS ", "SS/MS _RS to RS" and "SS/MS _RS to SS/MS _RS ".

Description of drawings

Fig. 1 is the frequency domain schematic diagram of OFDMA symbol;

Fig. 2 is the 802.16OFDMA (or SOFDMA) frame structure under FDD;

Fig. 3 is a schematic diagram of an advanced transit communication mode;

Fig. 4 is a schematic diagram of a simplified transit communication mode;

Fig. 5 is a schematic structural diagram of the system of the present invention;

FIG. 6 is a schematic diagram of co-channel interference mode 1;

FIG. 7 is a second schematic diagram of co-channel interference mode;

FIG. 8 is a schematic diagram of a physical layer frame structure of a BS and an RS in an advanced relay mode;

FIG. 9 is a schematic diagram of the physical layer frame structure of the BS and the RS in the simplified transit mode.

Detailed ways

The present invention provides a wireless relay communication system based on a mixture of FDD and TDD, specifically including a relay communication system in an advanced relay mode and a relay communication system in a simplified relay mode.

The advanced relay communication system model of RS, BS and MS/SS provided by the present invention is shown in FIG. 3 . In Figure 3, RS communicates with BS and MS/SS using FDD-TDD hybrid/TDM/OFDMA communication, BS and RS use frequency f2 for downlink, BS and RS use frequency f1 for uplink; MS/SS performs wireless transfer through RS The RS accesses the BS as an MS/SS.

In Figure 3, BS and MS/SS use FDD transceivers, while RS needs two sets of TDD wireless transceivers (ie, TDD transceiver 1 and TDD transceiver 2 in Figure 3): the first set of TDD transceivers (abbreviated as TDD1) works at frequency f1, and the second set of TDD transceivers (abbreviated as TDD2) works at frequency f2. DL _BS is the downlink subframe of the BS's physical layer frame, from BS to SS/MS _BS or RS, UL _BS is the uplink subframe of the BS's physical layer frame, from SS/MS _BS or RS to BS, SS/MS _BS Keep sending and receiving frame synchronization with BS, the first set of TDD receiver of RS and the transmitter of BS keep sending and receiving frame synchronization, the second set of TDD transmitter of RS and the receiver of BS keep sending and receiving frame synchronization; DL _RS is the physical layer of RS The downlink subframe of the frame, from BS to SS/MS _RS or RS, the uplink subframe of the physical layer frame of _RS , from SS/MS _RS or RS to BS, the transmitter of SS/MS _RS and the first UL subframe of RS The two sets of TDD receivers keep sending and receiving frame synchronously, and the receiver of SS/MS _RS and the first set of TDD transmitter of RS keep sending and receiving frame synchronously.

The simplified relay communication mode of RS, BS and MS/SS provided by the present invention is shown in FIG. 4 . In Figure 4, RS communicates with BS and MS/SS using FDD-TDD hybrid/TDM/OFDMA communication, BS and RS use frequency f2 for downlink, BS and RS use frequency f1 for uplink; RS accesses BS as an MS/SS .

In Figure 4, BS and MS/SS use FDD transceivers, while RS needs two sets of TDD wireless transceivers (ie, TDD transceiver 1 and TDD transceiver 2 in Figure 3): the first set of TDD transceivers (abbreviated as TDD1) works at frequency f1, and the second set of TDD transceivers (abbreviated as TDD2) works at frequency f2. DL _BS is the downlink subframe of the BS physical layer frame, from BS to SS/MS _BS or RS, UL _BS is the uplink subframe of BS physical layer frame, from SS/MS _BS or RS to BS; SS/MS _BS Or SS/MS _RS and BS keep sending and receiving frames synchronously. DL _RS is the downlink subframe of the RS physical layer frame, from BS to SS/MS _RS or RS, and UL _RS is the uplink subframe of RS physical layer frame, from SS/MS _RS or RS to BS. Among them, the downlink broadcast burst (Broadcast Burst) of the DL _BS , such as Preamble, FCH, DL-MAP, UL-MAP, is directly sent by the BS to the MS/SS without relaying through the RS; the initial access ranging of the MS/SS Ranging, periodic ranging Ranging, and bandwidth requests are sent directly from the MS/SS to the BS through the Ranging Subchannel of the UL _BS without relaying through the RS; for other downlink bursts of the DL _BS , such as data packets or Messages other than DL-MAP and UL-MAP cannot be directly sent from BS to MS/SS, but must be relayed through RS; other uplink bursts of UL _BS , such as initial access ranging and periodicity of MS/SS Except for the Ranging and bandwidth request messages, they cannot be sent directly from the MS/SS to the BS, but must be relayed through the RS.

The structure of the BS, RS and SS/MS relay communication system provided by the present invention will be described in detail below with reference to the accompanying drawings. As shown in FIG. 5 , this structure is respectively applicable to the two communication modes mentioned above, that is, the advanced transfer mode and the simplified transfer mode. In Fig. 5, the system structure includes:

Among them, the BS includes:

Wired transmission processing unit: able to establish communication with upper-level equipment (such as base station controller) or with a group of base station equipment respectively, and perform information interaction with upper-level equipment or each base station equipment;

FDD line transceiver: used for wireless communication with RS or SS/MS in TDD/FDD hybrid or FDD mode, composed of FDD wireless transmitter physical layer processing unit, FDD wireless receiver physical layer processing unit and FDD wireless transceiver data link The road layer processing unit is composed.

FDD wireless transmitter physical layer processing unit (frequency f1): separately communicate with the FDD wireless transceiver data link layer and the TDD wireless receiver 1 physical layer processing unit in the RS that can communicate with it or the FDD wireless receiver in the SS/MS The physical layer processing unit of the computer performs wireless communication; for the simplified transfer mode, this unit uses a channel with higher reliability than other data transmissions for the downlink subframe head broadcast of the DL _BS (such as Preamble, FCH, DL-MAP, UL-MAP) Coding and modulation (such as binary phase shift keying BPSK), or using a higher transmission power than other transmitted data, directly sent by the BS to the MS/SS without relaying through the RS;

FDD wireless receiver physical layer processing unit (frequency is f2): separately communicate with the FDD wireless transceiver data link layer and the TDD wireless transmitter 2 physical layer processing unit in the RS that can communicate with it or the FDD wireless transmission in the SS/MS The physical layer processing unit of the computer performs wireless communication;

FDD wireless transceiver data link layer processing unit: For the data from the FDD wireless receiver physical layer processing unit or wired transmission processing unit, after processing the data of the FDD wireless transceiver data link layer, forward it to the wired transmission processing unit or FDD wireless transmitter physical layer processing unit.

The structure of RS in Figure 5 includes:

TDD wireless transceivers 1 and 2: used for wireless communication with BS or SS/MS in TDD/FDD hybrid mode, composed of physical layer processing units of TDD wireless transmitters 1 and 2, and physical layers of TDD wireless receivers 1 and 2 The data link layer processing unit of processing unit and TDD wireless transceiver 1 and 2 is formed; Wherein, described TDD wireless transceiver 1, namely the first TDD wireless transceiver includes TDD wireless transmitter 1 physical layer processing unit (frequency is f1) and TDD wireless receiver 1 physical layer processing unit (frequency is f1), described TDD wireless transceiver 2, that is, the second TDD wireless transceiver includes TDD wireless transmitter 2 physical layer processing unit (frequency is f2) and TDD wireless receiver 2 physical layer processing unit (frequency is f2), which will be explained separately below:

TDD wireless transmitter 1 physical layer processing unit (frequency f1): perform wireless communication with TDD wireless transceiver 1 and 2 data link layers and the FDD wireless receiver physical layer processing unit in the BS that can communicate with it;

TDD wireless transmitter 2 physical layer processing unit (frequency is f2): perform wireless communication with TDD wireless transceiver 1 and 2 data link layers and the FDD wireless receiver physical layer processing unit in the SS/MS that can communicate with it;

TDD wireless receiver 1 physical layer processing unit (frequency f1): perform wireless communication with the TDD wireless transceiver data link layer and the FDD wireless transmitter physical layer processing unit in the BS that can communicate with it;

TDD wireless receiver 2 physical layer processing unit (frequency is f2): perform wireless communication with the FDD wireless transmitter physical layer processing unit in the TDD wireless transceiver data link layer and the SS/MS that can communicate with it;

TDD wireless transceiver data link layer processing unit: For the data from the TDD wireless receiver 1 and/or 2 physical layer processing unit, after the data processing of the TDD wireless transceiver data link layer, forward it to the TDD wireless transmitter 1 and/or 2 physical layer processing units.

The structure of SS/MS in Figure 5 includes:

FDD wireless transceiver: used for wireless communication with RS or BS in TDD/FDD hybrid or FDD mode, consisting of FDD wireless transmitter physical layer processing unit, FDD wireless receiver physical layer processing unit and FDD wireless transceiver data link layer Composition of processing units.

FDD wireless transmitter physical layer processing unit: perform wireless communication with the FDD wireless transceiver data link layer and the TDD wireless receiver 2 physical layer processing unit in the RS or the BS FDD wireless receiver physical layer processing unit that can communicate with it; for Simplified transfer mode, this unit uses uplink random access (Random Access) slots (or contention slots) of UL _BS , such as initial Ranging contention slots and bandwidth request contention slots, or initial MSS/SS Access ranging Ranging, periodic ranging Ranging, bandwidth request through the ranging subchannel RangingSubchannel of UL _BS , using channel coding and modulation methods with higher reliability than other transmitted data (such as binary phase shift keying BPSK), or Using a higher transmit power than other sent data, it is sent directly from the MS/SS to the BS without relaying through the RS;

FDD wireless receiver physical layer processing unit: perform wireless communication with the FDD wireless transceiver data link layer and the physical layer processing unit of the TDD wireless transmitter 1 in the RS or the FDD wireless transmitter physical layer processing unit in the BS that can communicate with it ;

FDD wireless transceiver data link layer processing unit: For the data from the FDD wireless receiver physical layer processing unit or user, after processing the data of the FDD wireless transceiver data link layer, forward it to the user or the FDD wireless transmitter physical layer processing unit.

In the present invention, in the FDD mode, the network system communication may have four kinds of mutual interference as shown in Fig. 6(a)-(d). In the TDD mode, there may be co-channel interference between RS systems as shown in Figure 7(e)-(g). Wherein, TX represents a transmitting module, and RX represents a receiving module.

Therefore, in order to meet the needs of transit communication and effectively overcome various interferences that may exist in the communication system, it is necessary to reasonably set the physical layer frame structure of BS and RS, and realize reliable transit communication through RS based on the corresponding physical layer frame structure.

The following will first describe the physical layer frame structure of the BS and RS provided by the present invention:

1. TDM technology is adopted in the downlink subframe DL _BS whose physical layer frame structure frequency is f1, and "DL Relay Zone (downlink transfer zone)" is added to define the BS downlink intermediate rotor channel transmitted from the BS to the RS Combined with OFDMA symbols;

For the case of multiple RSs, multiple RSs share the DL Relay Zone through different combinations of subchannels and OFDMA symbols;

2. Adopt TDM technology in the uplink subframe UL _RS of the physical layer frame structure of the first set of TDD transceivers (abbreviated as TDD1) whose frequency of RS is f1, and open up a "DL Relay Zone (downlink relay zone)" for Define the sub-channel and OFDMA symbol combination of the DL Relay Zone where the RS receives the BS;

For the case of multiple RSs, multiple RSs share the DL Relay Zone through different combinations of sub-channels and OFDMA symbols. Different RS TDD1 only receive the relay data of the BS in the corresponding combination of sub-channels and OFDMA symbols in the DL Relay Zone, and other sub-channels Combined with OFDMA symbols, reception is not arranged;

3. Adopt TDM technology in the uplink subframe UL _BS whose physical layer frame structure frequency is f2, and add "UL Relay Zone (uplink relay zone)", which is used to define the BS uplink intermediate rotor channel transmitted from RS to BS Combined with OFDMA symbols;

Similarly, in the case of multiple RSs, multiple RSs need to share the UL Relay Zone through different combinations of subchannels and OFDMA symbols;

4. Adopt TDM technology in the downlink subframe DL _RS of the physical layer frame structure of the second set of TDD transceiver (abbreviated as TDD2) whose frequency of RS is f2, and open up "UL Relay Zone (uplink transit area)", which is used for Define the sub-channel and OFDMA symbol combination of the UL Relay Zone where the RS receives the BS;

For the case of multiple RSs, multiple RSs share the UL Relay Zone through different combinations of sub-channels and OFDMA symbols, and different RS TDD2 only transmit the relay data of the BS in the corresponding combination of sub-channels and OFDMA symbols in the DL Relay Zone, and other sub-channels and OFDMA symbol combinations cannot be scheduled for transmission.

During the period corresponding to the BS UL Relay Zone, SS/MS _BS and SS/MS _RS do not arrange any combination of sending subchannels and OFDMA symbols, and RS does not arrange any combination of receiving subchannels and OFDMA symbols to avoid "SS/MS _BS to BS ", "SS/MS _RS to BS"interference; at the same time, during the period corresponding to BS DL Relay Zone, RS does not arrange any combination of sending subchannels and OFDMA symbols to avoid "RS to RS" self-interference.

In order to facilitate the transmission of broadcast information between BS and RS, the following settings need to be made in the physical layer frame structure of BS and RS:

1. Create a "DL Relay Broadcast Subchannel (downlink relay broadcast subchannel)" in the DL Relay Zone of the downlink subframe DL _BS with the frequency of f1 in the physical layer frame structure of the BS, which is used to define the downlink subchannel broadcast by the BS to the RS Combination of channels and OFDMA symbols, broadcast DCD, UCD, FPC, CLK_CMP broadcast messages defined by the 802.16 standard;

2. Create a "DL Relay Broadcast Subchannel (downlink relay broadcast subchannel)" in the DL RelayZone of the uplink subframe UL _RS of the TDD1 physical layer frame structure with the RS frequency f1, which is used to define the receiving BS downlink relay broadcast subchannel and The RS uplink sub-channel of the OFDMA symbol is combined with the OFDMA symbol to receive and broadcast DCD, UCD, FPC, and CLK_CMP broadcast messages defined by the 802.16 standard.

In the present invention, also need to carry out following setting in the physical layer frame structure of BS and RS:

1. Define "Relay Ranging Subchannel (relay ranging subchannel, abbreviated as RRS)" in the UL Relay Zone of the uplink subframe UL _BS with the frequency of f2 in the physical layer frame structure of the BS, and define it for the initial access of the RS Ranging, periodic ranging, BS relay ranging receiving sub-channel and OFDMA symbol combination for bandwidth request; the relay ranging sub-channel RRS can also be used as the initial access ranging Ranging, periodic measuring of SS/MSS _BS Used for Ranging and bandwidth request ranging sub-channels;

2. Create a "Relay Ranging TX Subchannel (relay ranging subchannel, abbreviated as RRS TX)" in the DL RelayZone of the downlink subframe DL _RS of the TDD2 physical layer frame structure with the frequency of RS being f2, which is used to define the initial RS Combination of access ranging Ranging, periodic ranging Ranging, RS relay ranging transmission subchannel and OFDMA symbol for bandwidth request.

The time-frequency relationship between the Relay Ranging Subchannel of BS and the Relay Ranging TXSubchannel of RS TDD2 must correspond one-to-one and be strictly synchronized.

In the downlink subframe of the physical layer frame structure of the BS or RS TDD1, except for the DL Header and the DL Relay Zone of the BS, the BS and different RSs share the rest of the downlink subframe through different combinations of subchannels and OFDMA symbols. Avoid "RS to SS/MS _RS ", "RS to SS/MS _BS " and "BS to SS/MS _RS " interference.

In the uplink subframe of the BS or RS TDD2 physical layer frame structure, except for the UL Relay Zone of the BS, the BS and different RSs share the rest of the uplink subframe through different combinations of subchannels and OFDMA symbols to avoid "RS to SS/MS _RS ", "SS/MS _BS to RS" and "SS/MS _RS to BS".

In the present invention, also need to carry out following setting in the physical layer frame structure of BS and RS:

1. Define "DLHeader (downlink subframe header)" in the downlink subframe DL _BS with the frequency of f1 in the physical layer frame structure of the BS, which is the beginning of the downlink subframe and is used to define the subchannel and OFDMA for sending user synchronization information Symbol combination and subchannel and OFDMA symbol combination for sending indication information to indicate the location and usage method profile of each subchannel and OFDMA symbol combination in the downlink subframe and uplink subframe of the BS physical layer frame structure;

The synchronization information and indication information include preamble, FCH, DL-MAP, UL-MAP in the original 802.16OFDMA (or SOFDMA) frame, and SS/MS _BS , RS and BS keep sending and receiving frame synchronization;

2. In the advanced transfer mode, define "DL Header (downlink subframe header)" in the downlink subframe DL _RS of the TDD1 physical layer frame structure with the RS frequency of f1, which is the beginning of the downlink subframe and is used to define Combination of subchannels and OFDMA symbols for sending user synchronization information and combination of subchannels and OFDMA symbols for sending indication information to indicate the positions of subchannels and OFDMA symbol combinations of downlink subframes and uplink subframes of RS TDD1 and TDD2 physical layer frame structures And use the method profile.

The synchronization information and indication information include preamble, FCH, DL-MAP, UL-MAP in the original 802.16OFDMA (or SOFDMA) frame, and the SS/MS _RS and RS keep the synchronization of sending and receiving frames;

3. In advanced transfer mode, the DL Header of RS TDD1 lags behind the DL Header of BS in time; during the DL Header of RS TDD1, the _BS cannot arrange any transmission sub-channels and OFDMA symbols in the DL subframe of the BS to avoid " BS to SS/MS _RS ” interference.

In advanced transfer mode, during the DL Header period of RS TDD1, the downlink subframe DL _RS of the physical layer frame structure of other RS TDD1 cannot arrange any transmission subchannels and OFDMA symbols to avoid "RS to SS/MS _RS "interference; In special cases, if the DL Headers of different RS TDD1 overlap in time, they must be completely overlapped, strictly synchronized, and their contents must be the same to avoid interference from "RS to SS/MS _RS ".

In the present invention, also need to carry out following setting in the physical layer frame structure of BS and RS:

Create "DLHeader RX (downlink subframe header reception)" in the uplink subframe UL _RS of the physical layer frame structure of TDD1 with the frequency of RS being f1, which is used to define the subchannel and OFDMA symbol combination of the DL Header of the receiving BS; Two sets of TDD transceivers obtain frequency and/or symbol synchronization according to the preamble and BS received by DL Header RX.

The time-frequency relationship between the DL Header of the BS and the DL Header RX of the RS TDD1 must correspond to each other and be strictly synchronized.

In the present invention, also need to carry out following setting in the physical layer frame structure of BS and RS:

1. Define "RangingSubchannel (ranging subchannel)" in the uplink subframe UL _BS with the frequency of f2 in the physical layer frame structure of the BS, and define the initial access ranging and periodic ranging for SS/MSS _BS Ranging, BS ranging receiving subchannel and OFDMA symbol combination of bandwidth request;

2. In the advanced transfer mode, define "Ranging Subchannel (ranging subchannel)" in the uplink subframe UL _RS of the TDD2 physical layer frame structure with the frequency of RS as f2, and define the initial connection for SS/MSS _RS Input ranging Ranging, periodic ranging Ranging, RS ranging receiving subchannel and OFDMA symbol combination for bandwidth request.

RS's downlink subframes must not overlap with other RS's uplink subframes, and RS's uplink subframes must not overlap with other RS's downlink subframes, avoiding "SS/MS _RS to RS" and "SS/MS _RS to SS /MS _RS ” interference.

Reserve at least TTG duration between the downlink subframe DL _RS of the RS and the uplink subframe UL _RS of the RS; reserve at least RTG duration between the uplink subframe UL _RS of the RS and the downlink subframe DL _RS of the RS.

In the present invention, except for DL Header and Ranging Subchannel, the subchannels and OFDMA symbol combinations or Zones defined above are not required to exist in each frame.

In the present invention, according to the above physical layer frame structure, the specific implementation of the physical layer frame structure of the corresponding BS and RS is shown in Figure 8 and Figure 9, wherein Figure 8 is the physical layer frame of the BS and RS in the advanced transfer mode Schematic diagram of the structure, FIG. 9 is a schematic diagram of the physical layer frame structure of the BS and the RS in the simplified transit mode. In FIG. 8 and FIG. 9, the sending and receiving frequencies of RS and BS are subject to the frequency label at the far left of the frame in the figure. "NULL" or a blank part in the figure indicates a part where no reception or transmission is scheduled.

The position marked Preamble, UL-MAP, DL-MAP and FCH in the BS downlink subframe DL _BS and RS TDD1 downlink subframe DL _RS is DL Header; the position marked in the RS TDD1 uplink subframe UL _RS is sync with BS ( Synchronize with BS) and Get MAP info (get MAP information) are located at DL Header RX.

The DL Relay Zone of the BS (that is, DL Relay broadcast, DL Relay R#1, #2... part) is arranged after the DL Header of the DL _BS in the BS downlink subframe, and the UL Relay Zone of the BS (that is, ULRelay R#1, # 2... and RRS TX part) are arranged at the beginning part of the BS downlink subframe DL _BS . During the period corresponding to BS UL Relay Zone, SS/MS _BS and SS/MS _RS do not arrange any combination of sending subchannels and OFDMA symbols, and RS does not arrange any combination of receiving subchannels and OFDMA symbols; during the period corresponding to BSDL Relay Zone, RS No combination of transmit subchannels and OFDMA symbols is scheduled.

A PHY burst is assigned a group of adjacent subchannels and a group of OFDMA symbols, and the BS and different RSs share the rest of the downlink subframe through different combinations of subchannels and OFDMA symbols.

The relay communication processing process provided by the present invention will be described below in conjunction with specific communication process application examples. The relay communication processing process includes a downlink transfer process and an uplink transfer process, which will be described separately below.

The downlink transfer process in the corresponding transfer communication processing flow in the present invention includes two stages, the first stage is the processing from the BS to the RS, and the second stage is the processing from the RS to the user terminal:

(1) The first stage (BS->RS)

In the first phase, the Advanced Transition Mode and the Simplified Transit Mode are treated the same, including:

1. The BS sends the preamble preamble in the first symbol symbol in the DL Header of the DL _BS in the downlink subframe with frequency f1;

2. RS#1 receives the preamble in the DL Header of the BS downlink subframe DL _BS through the DL Header RX of the RS TDD1 frequency f1, and synchronizes with the BS;

3. The BS sends FCH, DL-MAP, and UL-MAP after the preamble of the DL Header of the DL _BS in the downlink subframe with frequency f1;

4. RS#1 receives the FCH, DL-MAP, and UL-MAP of the DL Header of the DL _BS in the downlink subframe through the DL Header RX of the RS TDD1 frequency f1, and obtains the sub-channels and OFDMA symbol positions of the BS downlink and uplink bursts and Usage (profile) information;

5. The BS uses the DL Relaybroadcast of the DL Relay Zone of the downlink subframe DL _BS with frequency f1 to send a broadcast message message;

6. The BS sends the downlink relay communication data traffic data to RS#1 in the DL Relay RS#1 of the DL Relay Zone of the DL _BS in the downlink subframe with frequency f1;

7. RS#1 receives the broadcast message in the DL Relay broadcast of the DL Relay Zone of the DL Relay Zone of the BS downlink subframe DL _BS through the DL RB of RS TDD1 frequency f1, which may contain the message that RS#1 needs to relay the broadcast;

8. The RS#1 receives the downlink transit communication data in the DL Relay RS#1 of the DL Relay Zone of the BS downlink subframe DL _BS through the DL Relay Zone of the RS TDD1 frequency f1.

(2) The second stage (RS->MS/SS):

At this stage, advanced transit mode and simplified transit mode are handled differently, where:

For the advanced transit mode, the processing at this stage is:

1. RS#1 TDD1 sends the preamble preamble in the first symbol symbol in the DL Header of the downlink subframe DL _RS frequency f1;

2. The MS/SS receives the preamble preamb1e in the DL Header of the DL _RS in the downlink subframe of RS#1 TDD1, and synchronizes with RS#1;

3. RS#1 TDD1 sends FCH, DL-MAP, and UL-MAP after the preamble of the DL Header with the DL _RS frequency of f1 in the downlink subframe (the FCH, DL-MAP, and UL-MAP of RS#1 can already be In step 6 of the first stage, the BS sends to RS#1;

4. The MS/SS receives the FCH, DL-MAP, and UL-MAP of the DL Header of the DL _RS in the downlink subframe of RS#1 TDD1, and obtains the subchannels and OFDMA symbol positions and usage of the downlink and uplink bursts of RS#1 TDD1 and TDD2 method (profile) information;

5. In the downlink subframe DL _RS , RS#1 TDD1 sends the downlink transit communication data traffic data to the MS/SS at the frequency f1 in the time-frequency interval except the DL Header, and the transit communication data is in the first stage It has been sent to RS#1 by BS in step 6;

6. The MS/SS receives the downlink transit communication data in the DL _RS of the RS#1 TDD1 downlink subframe from the corresponding time-frequency interval.

For the simplified transit mode, the processing process at this stage is:

1. The MS/SS receives the preamble in the DL Header of the BS downlink subframe DL _BS , and synchronizes with the BS;

2. The MS/SS receives the FCH, DL-MAP, and UL-MAP of the DL Header of the BS downlink subframe DL _BS , and obtains the subchannels and OFDMA symbol positions and usage methods (profile) of each downlink and uplink burst of the BS and RS#1 information;

3. In the downlink subframe DL _RS , RS#1 TDD1 sends downlink transit communication data traffic data to MS/SS at frequency f1 in the time-frequency interval except DL Header, and the transit communication data described in the first stage It has been sent to RS#1 by BS in step 6;

4. The MS/SS receives the downlink transit communication data in the DL _RS of the RS#1 TDD1 downlink subframe from the corresponding time-frequency interval.

Similarly, the uplink transfer process in the corresponding transfer communication processing flow in the present invention includes two stages, the first stage is the processing from the user terminal to the RS, and the second stage is the processing from the RS to the BS:

(1) The first stage (MS/SS->RS):

For the advanced transit mode, the processing at this stage is:

1. MS/SS MS/SS receives RS#1 TDD1 downlink subframe DL _RS frequency of "DLHeader" FCH, DL-MAP, UL-MAP, and obtains subframes of RS#1 TDD1 and TDD2 downlink and uplink bursts. Channel and OFDMA symbol location and usage (profile) information;

2. MS/SS sends uplink communication data traffic data to RS#1 at frequency f2 in the uplink subframe UL _RS of RS TDD2;

3. RS#1 TDD2 receives the uplink communication data traffic data in the MS/SS uplink subframe UL _RS from the corresponding time-frequency interval at frequency f2.

For the simplified transit mode, the processing at this stage is:

1. MS/SS MS/SS receives the FCH, DL-MAP, and UL-MAP of the DL Header of the BS downlink subframe DL _BS frequency f1, and obtains the subchannels and subchannels of each downlink and uplink burst of BS, RS#1 TDD1 and TDD2 OFDMA symbol location and usage (profile) information;

2. MS/SS sends uplink communication data traffic data to RS#1 at frequency f2 in RS TDD2 uplink subframe UL _RS ;

3. RS#1 TDD2 receives the uplink communication data traffic data in the MS/SS uplink subframe UL _RS from the corresponding time-frequency interval at frequency f2.

The second stage (RS->BS):

At this stage, advanced transit mode and simplified transit mode are handled in the same way, specifically:

1. RS#1 TDD1 receives the FCH, DL-MAP, and UL-MAP of the DL Header with frequency f1 in the BS downlink subframe DL _BS , and obtains the subchannels and OFDMA symbol positions and usage methods of the BS downlink and uplink bursts (profile )information;

2. RS#1 TDD2 sends the uplink transit communication data traffic data to the BS in the UL RelayRS#1 of the UL Relay Zone of the downlink subframe DL _RS with frequency f2, and the transit communication data has been sent by the BS in step 2 of the first stage BS sends to RS#1;

3. The BS receives the uplink relay communication data traffic data in S5 in the UL Relay RS#1 of the UL Relay Zone of the uplink subframe UL _BS with frequency f2.

The present invention defines the physical layer frame structure of BS and RS by introducing a mechanism combining TDM and OFDMA,

1. Support OFDMA (or SOFDMA) wireless advanced transfer mode, that is, MS/SS can perform wireless transfer access to BS through RS;

1. Support OFDMA (or SOFDMA) wireless simplified transfer mode, that is, the downlink data message of BS or the message message except DL-MAP and UL-MAP can be transferred through RS; other uplink bursts of BS, except MS/ SS's initial access ranging Ranging, periodic ranging Ranging, and bandwidth request messages can be relayed through RS;

2. Effectively guarantee the communication between RS and BS, MS/SS in FDD-TDD hybrid/TDM/TDMA mode;

3. Avoid interference from "RS to SS/MS _BS " and "BS to SS/MS _RS ";

4. Avoid interference from "SS/MS _BS to BS", "SS/MS _BS to RS" and "SS/MS _RS to BS"

5. Avoid "RS to RS" self-interference;

6. Avoid interference from "RS to SS/MS _RS ", "SS/MS _RS to RS" and "SS/MS _RS to SS/MS _RS ".

The above is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed in the present invention can easily think of changes or Replacement should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be determined by the protection scope of the claims.

Claims (26)

1, a kind of wireless transfer communication system is characterized in that, comprises base station BS, terminal RS and user terminal, and described RS comprises a TDD transceiver and the 2nd TDD transceiver and provides interface with BS and user terminal communication respectively; TDD transceiver among the described RS comprises TDD wireless receiver physical layer element and the TDD transmitting set physical location that adopts identical first frequency, and with BS in FDD transmitting set physical layer element, and the FDD wireless receiver physical layer element in the user terminal is corresponding and keep receiving frame synchronous; The 2nd TDD transceiver among the described RS comprises TDD wireless receiver physical layer element and the TDD transmitting set physical location that adopts identical second frequency, and with the FDD transmitting set physical layer element in the user terminal, and the FDD wireless receiver physical layer element among the BS is corresponding and keep receiving frame synchronous.

2, wireless transfer communication system according to claim 1 is characterized in that, also is provided with the wire transmission processing unit that is connected with upper level equipment among the described BS.

3, wireless transfer communication system according to claim 1, it is characterized in that, also be respectively arranged with corresponding FDD transceiver data-link layer unit in described BS and the user terminal, be provided with TDD transceiver data-link layer unit among the described RS.

4, according to claim 1,2 or 3 described wireless transfer communication system, it is characterized in that, described BS also provides the interface with user terminal communication, described BS is by adopting predetermined chnnel coding and modulation system, perhaps, adopt predetermined transmission power level that lead code Preamble, frame control head FCH, descending mapping table DL-MAP and up mapping table UL-MAP information are directly sent to user terminal from this interface.

5, a kind of method that realizes wireless transfer communication is characterized in that, comprising:

A, in based on the descending sub frame of the physical layer frame structure of the BS of FDD and sub-frame of uplink, adopt the time division multiplexing tdm mode that descending transfer district and up transfer district are set respectively, in the descending sub frame of the physical layer frame structure of the sub-frame of uplink of the physical layer frame structure of the TDD transceiver of RS and the 2nd TDD transceiver, descending transfer district and up transfer district are set respectively, are used to define the subchannel and the OFDMA symbol combination of carrying out information interaction between BS and RS;

B, the mode that adopts FDD/TDD to mix based on the uplink and downlink physical layer frame of the BS of described setting and RS between BS, RS and user terminal are carried out wireless transfer communication.

6, the method for realization wireless transfer communication according to claim 5, it is characterized in that, during the up transfer district of described BS correspondence, user terminal under BS and RS cover is not all arranged any transmission subchannel and OFDMA symbol combination, and RS does not arrange any reception subchannel and OFDMA symbol combination.

When having a plurality of RS, share downlink or uplink transfer district by different subchannels and OFDMA symbol combination between a plurality of RS, different RS only receives or sends data in corresponding subchannel and the OFDMA symbol combination in descending transfer district.

According to the method for claim 5 or 6 described realization wireless transfer communication, it is characterized in that 7, described steps A comprises:

In the descending transfer district in the sub-frame of uplink of the physical layer frame structure of the TDD transceiver of BS and RS descending transfer broadcast sub-channels is set respectively, be used to define downlink sub-channels and the OFDMA symbol combination that BS is broadcast to RS, and the up subchannel and the OFDMA symbol combination of the descending transfer broadcast sub-channels of RS reception BS, be used for broadcast downstream channel descriptor DCD, upstream channel descriptor UCD, FPC (fast power control) or CLK_CMP between BS and RS (clock is relatively) broadcasting packet.

8, the method for realization wireless transfer communication according to claim 5 is characterized in that, described steps A comprises:

Transfer range finding subchannel is set in the descending sub frame of the physical layer frame structure of BS, is used to define initial access range finding, the Perodic ranging of RS, the BS transfer range finding of bandwidth request receives subchannel and OFDMA symbol combination;

In the descending sub frame of the physical layer frame structure of the 2nd TDD transceiver of RS, the transfer range finding is set and sends subchannel, be used to define initial access range finding, the Perodic ranging of RS, the BS transfer range finding of bandwidth request sends subchannel and OFDMA symbol combination.

9, the method for realization wireless transfer communication according to claim 8 is characterized in that, the transfer range finding subchannel of described BS and the transfer range finding of RS send the corresponding one by one setting of subchannel, and need to keep synchronously.

10, the method for realization wireless transfer communication according to claim 5 is characterized in that, described steps A comprises:

In the descending sub frame of the physical layer frame structure of BS, the descending sub frame head is set, be arranged on the zero hour of descending sub frame, be used to define subchannel and OFDMA symbol combination that sends user's synchronizing information and subchannel and the OFDMA symbol combination that sends indication information, be used to refer to the position and the using method of each subchannel and the OFDMA symbol of BS physical layer frame structure descending sub frame and sub-frame of uplink.

11, the method for realization wireless transfer communication according to claim 5 is characterized in that, described steps A comprises:

During user terminal direct communication under BS can't cover with RS, then in the descending sub frame of the physical layer frame structure of the identical TDD transceiver of the frequency that adopts with user terminal FDD wireless receiver physical layer element of RS, the descending sub frame head is set, be arranged on the zero hour of descending sub frame, be used to define subchannel and OFDMA symbol combination that sends user's synchronizing information and subchannel and the OFDMA symbol combination that sends indication information, be used to indicate the position and the using method of each subchannel and the OFDMA symbol of RS physical layer frame structure descending sub frame and sub-frame of uplink.

12, the method for realization wireless transfer communication according to claim 11 is characterized in that, described steps A comprises:

The descending sub frame head of RS lags behind the descending sub frame head of BS in time, and during the descending sub frame head of RS, the descending sub frame of BS can not be arranged any transmission subchannel and OFDMA symbol combination.

13, the method for realization wireless transfer communication according to claim 11 is characterized in that, described steps A comprises:

When having a plurality of RS, during the descending sub frame head of RS, the descending sub frame of other RS can not be arranged any transmission subchannel and OFDMA symbol,

Or

When having a plurality of RS, during the descending sub frame head of RS, the descending frame head of different RS is overlapping in time, and then requirement is overlapping fully synchronously, and the descending frame head content must be identical.

14, the method for realization wireless transfer communication according to claim 10 is characterized in that, described steps A comprises:

The descending sub frame head is set in the physical layer frame structure sub-frame of uplink of the TDD transceiver of RS to be received, be used to define the subchannel and the OFDMA symbol combination of the descending sub frame head that receives BS, and the descending sub frame head that requires this RS receives corresponding one by one with the descending sub frame head needs of BS, and keeps synchronously.

15, the method for realization wireless transfer communication according to claim 5 is characterized in that, described steps A comprises:

In the sub-frame of uplink of the physical frame structure of BS, the range finding subchannel is set, is used to define initial access range finding, the Perodic ranging of user terminal, the BS range finding of bandwidth request receives subchannel and OFDMA symbol combination.

16, the method for realization wireless transfer communication according to claim 5 is characterized in that, described steps A also comprises:

During user terminal direct communication under BS can't cover with RS, then in the sub-frame of uplink of the physical layer frame structure of RS the 2nd TDD transceiver, the range finding subchannel is set, is used to define initial access range finding, the Perodic ranging of user terminal, the RS range finding of bandwidth request receives subchannel and OFDMA symbol combination.

17, according to the method for claim 5,6 or 8 to 16 each described realization wireless transfer communication, it is characterized in that, the descending sub frame of described RS can not be overlapping with the sub-frame of uplink of other RS, and the sub-frame of uplink of described RS can not be overlapping with the descending sub frame of other RS.

According to the method for claim 5,6 or 8 to 16 each described realization wireless transfer communication, it is characterized in that 18, described steps A also comprises:

In the descending sub frame of the physical layer frame structure of the TDD transceiver of described BS or RS, except that the descending transfer district of descending sub frame head and BS, BS and different RS share the remainder of descending sub frame by different subchannels and OFDMA symbol combination; And/or

In the sub-frame of uplink of the physical layer frame structure of the 2nd TDD transceiver of BS or RS, except that the up transfer district of BS, BS and different RS share the remainder of sub-frame of uplink by different subchannels and OFDMA symbol combination.

According to the method for claim 5,6 or 8 to 16 each described realization wireless transfer communication, it is characterized in that 19, described steps A comprises:

Described descending sub frame head and range finding subchannel are set to be present in BS and each frame of RS, and described descending transfer district, up transfer district, descending transfer broadcast sub-channels, transfer range finding subchannel, descending sub frame head receive and then be not set to be present in each frame.

According to the method for claim 5,6 or 8 to 16 each described realization wireless transfer communication, it is characterized in that 20, described step B comprises:

The up-downgoing transfer district that comprises in the uplink and downlink physical layer frame based on BS that is provided with and RS between BS, RS and user terminal, descending transfer broadcast sub-channels, transfer range finding subchannel, descending sub frame head and/or descending sub frame head receive and carry out the mutual of message, realize wireless transfer communication.

21, a kind of method that realizes wireless transfer communication is characterized in that, comprising:

By the downlink communication process of BS to user terminal:

C, BS send data in the descending transfer district of the descending sub frame of BS to RS, and RS receives described data by the descending transfer district in the sub-frame of uplink of RS the one TDD transceiver;

D, RS send the data set user terminal at the descending sub frame of RS the one TDD transceiver;

By the uplink communication process of user terminal to BS:

E, by in the sub-frame of uplink of RS the 2nd TDD transceiver, sending upstream data to be sent by user terminal, and receive described data by RS the 2nd TDD transceiver;

F, RS send up interim data in the up transfer district of the descending sub frame of RS the 2nd TDD transceiver, and BS receives described interim data in the up transfer district of the sub-frame of uplink of BS.

22, the method for realization wireless transfer communication according to claim 21 is characterized in that, is describedly also comprised to the downlink communication process of user terminal by BS:

BS and/or RS the one TDD transceiver be respectively at first symbol of the descending sub frame head of each self-corresponding descending sub frame or send lead code, and it is synchronous to receive the RS of lead code or user terminal and BS or RS.

23, the method for realization wireless transfer communication according to claim 22 is characterized in that, after sending described lead code, also comprises:

Described BS and/or RS the one TDD transceiver also will send FCH, DL-MAP and UL-MAP information, receive RS the one TDD transceiver of each information or user terminal is determined each burst according to each information subchannel and OFDMA character position and using method information.

According to the method for claim 21,22 or 23 described realization wireless transfer communication, it is characterized in that 24, described step C also comprises:

BS sends broadcast in the descending transfer broadcast sub-channels in the descending transfer district of BS descending sub frame to RS the one TDD transceiver, and RS receives described message by the descending transfer broadcast sub-channels in the sub-frame of uplink of RS the one TDD transceiver.

25, the method for realization wireless transfer communication according to claim 21 is characterized in that, is also comprised to the downlink communication process of user terminal by BS:

Lead code in the descending sub frame head of user terminal reception BS descending sub frame, and synchronous with BS;

User terminal receives FCH, DL-MAP and the UL-MAP information that BS sends, and obtains subchannel and the OFDMA character position and the using method information of each burst of BS and RS.

26, the method for realization wireless transfer communication according to claim 21 is characterized in that, is describedly also comprised by the uplink communication process of user terminal to BS:

User terminal receives FCH, DL-MAP and the UL-MAP information of descending sub frame head of the descending sub frame of RS the one TDD transceiver, determines subchannel and the OFDMA character position and the using method information of each burst of RS; Perhaps, user terminal receives FCH, DL-MAP and the UL-MAP information of descending sub frame head of the descending sub frame of BS, determines subchannel and the OFDMA character position and the using method information of each burst of BS and RS;

RS the one TDD transceiver receives FCH, DL-MAP and the UL-MAP information of the descending sub frame head in the BS descending sub frame, obtains subchannel and the OFDMA character position and the using method information of each burst of BS.

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