CN1956354A - Radio relay communication system and implementing method - Google Patents

Abstract

The invention relates to a wireless relay communication system and a realization method. The present invention mainly includes: providing a simplified transfer communication mode; at the same time, setting a downlink transfer area and an uplink transfer area in the downlink subframe and uplink subframe of the base station BS physical layer frame structure of the OFDMA system respectively, In the uplink subframe and downlink subframe of the frame structure, a downlink transfer area and an uplink transfer area are respectively set, which are used to define the intermediate channel and OFDMA symbol combination between the BS and the RS, so that the communication between the BS and the RS is based on the uplink , The downlink physical layer frame adopts TDD (time division duplex) and TDM (time division multiplexing) to carry out wireless relay communication. Therefore, the implementation of the present invention can effectively ensure the same frequency communication between RS, BS and MS/SS in TDD mode, and can effectively avoid various interferences.

Description

A wireless relay communication system and its implementation method

technical field

The invention relates to the technical field of wireless communication, in particular to a wireless relay communication system and an implementation method.

Background technique

IEEE 802.16 is the first broadband wireless access standard. There are two main versions: the broadband fixed wireless access version of the 802.16 standard (802.16-2004) and the broadband mobile wireless access version of the 802.16 standard (802.16e). Among them, only two network elements are defined in the 802.16-2004 version, BS (base station) and SS (subscriber station); similarly, only two network elements are defined in the 802.16e version, BS and MSS (mobile subscriber station) .

At present, 802.16 Multihop Relay SG (802.16 Multihop Relay Research Group) has proposed the concept of RS (relay station) in WiMAX (Global Interoperability of Microwave Access). An important function of the RS is to act as a relay between the BS and the SS/MSS, thereby expanding the coverage of the BS or increasing the throughput of the subscriber station.

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

In the OFDMA system, there are several types of subcarriers divided according to the type of data transmitted:

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 Subcarrjer).

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). Among them, 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 802.16OFDMA (or SOFDMA) frame structure under TDD is shown in Figure 2. In 802.16 OFDMA (or SOFDMA) mode, a PHY 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 UL in FIG. 2 ). In TDD mode, the downlink subframe DL is transmitted first, followed by the uplink subframe UL. 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. The downlink subframe starts with a preamble for physical synchronization; followed by FCH, 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. DL-MAP is used to indicate the subchannel and OFDMA symbol position and usage method (profile) of each downlink burst, and UL-MAP is used to indicate The subchannels and OFDMA symbol positions and usage methods of each burst in the uplink. In the TDD system, TTG (Transmit/Receive Transition Gap) and RTG (Receive/Transmit Transition Gap) will be inserted when the uplink and downlink subframes alternate to allow a period of time for the BS to complete the alternate transmission and reception.

The difference between the 802.16OFDMA (or SOFDMA) frame structure under FDD and the 802.16OFDMA (or SOFDMA) frame structure under TDD is that uplink subframes and downlink subframes are sent on different frequencies, and there is no need to set TTG and RTG.

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 implementation method, so that relay communication can be realized through RS based on TDD in the OFDMA system, 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 also provides a wireless transfer communication system, including a base station BS, a user terminal and a transfer station RS, the BS is provided with an interface for communicating with the RS, and the RS is provided with an interface for communicating with the user terminal and the BS, The user terminal is provided with an interface for communicating with the RS, and the BS, RS and the user terminal communicate through the interface.

The BS is also provided with an interface for communicating with the user terminal, and the user terminal is provided with an interface for communicating with the BS, and the BS directly communicates with the user terminal through the interface.

The BS, RS and user terminal communicate with each other using the same frequency point, and the BS communicates with the user terminal or RS through uplink and downlink subframes respectively, and the RS communicates with the user terminal or BS through uplink and downlink subframes respectively .

The three entities of the BS, the RS and the user terminal respectively include a time division duplex TDD wireless transmitter physical layer unit and a TDD wireless receiver physical layer unit, and each of the TDD wireless transmitter physical layer units is respectively provided with other A communication interface for communicating with the physical layer units of the TDD wireless receiver in the entity, each of the physical layer units of the TDD receiver is provided with a communication interface for communicating with the physical layer units of the TDD wireless transmitter in other entities.

The BS, the RS and the user terminal are respectively provided with a TDD wireless transceiver data link layer unit connected and communicating with the TDD wireless transmitter physical layer unit and the TDD wireless receiver physical layer unit in the local entity, and, The BS is also provided with a wired transmission processing unit connected and communicated with the upper level.

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

A. In the downlink subframe and uplink subframe of the base station BS physical layer frame structure of the OFDMA system, the downlink transfer area and the uplink transfer area are respectively set in the TDM mode of time division multiplexing, and the uplink subframe and the uplink transfer area of the transfer station RS physical layer frame structure The downlink transit area and the uplink transit area are respectively set in the downlink subframe, which are used to define the sub-channel and OFDMA symbol combination between the BS and the RS;

B. Between the BS, the RS and the user terminal, the uplink and downlink physical layer frames of the BS and the RS based on the above settings adopt time division duplex TDD for wireless relay communication.

The uplink transit area in the physical layer frame structure of the BS corresponds to the downlink transit area, and, during the period when the downlink transit area of the BS corresponds to the uplink transit area, the user terminal does not set receiving or sending subchannels and OFDMA symbol combinations.

In the present invention, when there are multiple RSs, the multiple RSs share the downlink or uplink transit area through different combinations of subchannels and OFDMA symbols, and different RSs are only in the corresponding combinations of subchannels and OFDMA symbols in the downlink transit area. Receive or send data.

Described step A comprises:

Set the downlink transit broadcast channel in the downlink transit area of the downlink subframe of the physical frame structure of the BS, which is used to define the downlink channel and OFDMA symbol combination broadcast by the BS to the RS, and broadcast the corresponding broadcast message;

The downlink broadcast receiving channel is set in the downlink transfer area of the uplink subframe of the physical frame structure of the RS, which is used to define the RS uplink subchannel and OFDMA symbol combination for receiving the BS downlink transfer broadcast channel, and receive the corresponding broadcast message.

Described step A also includes:

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 transmission sub-channel in the downlink subframe of the physical layer frame structure of the RS, which is used to define the BS relay ranging transmission sub-channel and OFDMA symbol combination of the initial access ranging, periodic ranging, and bandwidth request of the RS .

The relay ranging sub-channel of the BS and the relay ranging sending sub-channel of the RS are correspondingly set and kept in strict synchronization.

Described step A also includes:

Set the downlink frame header in the downlink frame of the BS, or the physical layer frame structure of the BS and RS, specifically at the beginning of the downlink subframe, to define the subchannel for sending user synchronization information and the subchannel for sending indication information and OFDMA symbols combination to indicate the BS, or the position and use method profile of each subchannel of the BS and RS physical layer frame structure downlink frame and uplink frame, wherein the downlink frame header of the RS lags behind the downlink frame header of the BS in time, and in During the downlink frame header of the RS, the BS cannot set the downlink subframe to send subchannels and OFDMA symbol combinations.

The downlink subframe includes:

Preamble preamble, frame control header FCH burst, downlink mapping table DL-MAP and/or uplink mapping table UL-MAP in orthogonal frequency division multiplexing or single carrier frame.

Described step A also includes:

When there are multiple RSs, during the downlink frame header of the RS, other RSs cannot set the downlink subframe to send subchannels and OFDMA symbol combinations;

or

When there are multiple RSs, the downlink subframe headers of different RSs overlap completely in time, are strictly synchronized, and their contents must be the same.

Described step A also includes:

Set the downlink subframe header reception in the downlink frame of the physical layer frame structure of the RS, which is used to define the subchannel and OFDMA symbol combination for the RS to receive the BS downlink frame header, and the downlink frame header reception must completely overlap with the BS's downlink frame header and strictly synchronized.

Described step A also includes:

Set the uplink ranging subchannel in the uplink subframe of the physical layer frame structure of the BS and RS, which is used to define the RS ranging receiving subchannel and OFDMA symbol combination of the received ranging, periodic ranging, and bandwidth request of the user terminal .

Described step A also includes:

Except for the uplink transit area and the downlink transit area, the uplink subframe of the BS and the downlink subframe of the RS, and the downlink subframe of the BS and the uplink subframe of the RS cannot overlap each other.

Described step A comprises:

In the downlink subframe of the physical layer frame structure of the BS or RS, except for the downlink frame header, the downlink transit area of the BS, and the uplink transit area of the RS, the BS and different RSs share the downlink subframe through different subchannels and OFDMA combinations. the rest of the frame.

Described step A comprises:

In the uplink subframe of the physical layer frame structure of the BS or RS, except for the reception of the downlink subframe head, the downlink transit area of the RS, and the uplink transit area of the BS, the BS and different RSs share through different subchannels and OFDMA combinations. the rest of the uplink subframe.

Described step A comprises:

Between the downlink subframe of the BS or RS and the uplink subframe of the BS, at least the transmission/reception transition gap TTG duration is reserved, and/or, at least the reception/transmission transition is reserved between the uplink subframe of the BS or RS and the downlink subframe of the BS Gap RTG duration; moreover, for the case where BS and user terminal can communicate directly, during BS's TTG, RS cannot arrange any combination of sending subchannels and OFDMA symbols; during BS's RTG period, RS cannot arrange any receiving subchannels and OFDMA combination of symbols.

Described step A comprises:

Except for the downlink frame header and the ranging sub-channel, each sub-channel and OFDMA symbol combination or area is not required to be set in each frame.

Described step B comprises:

Between the BS, the RS and the user terminal, the uplink and downlink transit area, the uplink and downlink transit broadcast subchannel, the downlink subframe header, the reception of the downlink subframe header and/or The ranging sub-channel performs message interaction to realize wireless relay communication.

The present invention also provides a method for implementing 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 of the uplink subframe of the RS;

D. The RS sends the data group user terminal in the downlink subframe of the RS;

Uplink communication process from user terminal to BS:

E. The user terminal sends uplink data in the uplink subframe of the RS, and the RS receives the data;

F. The RS sends the uplink relay data in the uplink transfer area of the RS downlink subframe, and the BS receives the transfer data in the uplink transfer area of the BS's uplink subframe.

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

The BS and the RS respectively transmit a preamble at the first symbol of the head of the downlink subframe of the respective 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 BS or RS will also send the frame control header FCH, the downlink mapping table DL-MAP and the uplink mapping table UL-MAP information, and the RS or user terminal receiving each information determines the time slot and subchannel of each burst according to each information and/or symbol location and usage information.

Described step C also includes:

The BS sends a broadcast message to the RS on the downlink transit broadcast subchannel in the downlink transit area of the BS downlink subframe, and the RS receives the message through the downlink transit broadcast subchannel in the RS uplink subframe.

Described step C also includes:

When the BS and the user terminal can communicate directly, the BS broadcasts the downlink subframe header using a specific channel coding and modulation method, or using a higher transmission power than the transmitted data, and the BS directly sends it to the user terminal.

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 time slot, subchannel and/or 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 RS, and determines each burst subchannel of the RS, symbol position and usage method information; or, the user terminal receives the downlink subframe of the BS FCH, DL-MAP and UL-MAP information of the downlink subframe header of the frame, determine each burst subchannel of BS and RS, symbol position and usage method information;

The RS receives the FCH, DL-MAP and UL-MAP information of the downlink subframe header in the downlink subframe of the BS, and obtains information about each burst subchannel of the BS, symbol positions and usage methods.

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, thus making the present invention have the following advantages:

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

2. 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;

3. Effectively guarantee the same frequency communication between RS and BS, MS/SS in TDD mode;

4. Effectively avoid the following types of interference:

"RS to SS/MS _RS ", "RS to SS/MS _BS " and "BS to SS/MS _RS "interference;

"SS/MS _RS to RS", "SS/MS _BS to RS" and "SS/MS _RS to BS"interference;

"SS/MS _BS to SS/MS _RS " and "SS/MS _RS to SS/MS _BS "interference;

"BS to RS" and "RS to BS" interference.

Description of drawings

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

Fig. 2 is a schematic diagram of OFDMA frame structure under TDD;

Fig. 3 is a schematic diagram 1 of the OFDMA communication system model;

Fig. 4 is the second schematic diagram of the OFDMA communication system model;

Fig. 5 is the specific structure schematic diagram of Fig. 4;

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

FIG. 7 is a first schematic diagram of the physical layer frame structure of the BS and the RS;

FIG. 8 is a second schematic diagram of the physical layer frame structure of the BS and the RS;

FIG. 9 is a schematic diagram three of physical layer frame structures of BS and RS;

FIG. 10 is a fourth schematic diagram of the physical layer frame structure of the BS and the RS.

Detailed ways

The core of the invention is to define the physical layer frame structure of BS and RS by introducing the mechanism combining TDM and OFDMA.

In the present invention, the structure of the transfer mode communication system mainly includes two types, as shown in Figure 3 and Figure 4 respectively, one is an advanced transfer mode communication system, and the other is a simplified transfer mode communication system, and the two systems will be respectively described below The model is explained.

(1) The advanced transfer mode communication system model between RS, BS, and MS/SS is shown in Figure 3, which is a common communication system model, in which TDD/TDM/OFDMA is adopted between RS, BS, and MS/SS Communication under the same frequency point, MS/SS performs wireless relay access to BS through RS, and RS accesses BS as an MS/SS.

In Figure 3, (1) DL _BS is the downlink subframe of the BS’s physical layer frame, from BS to SS/MS _BS or RS; (2) UL _BS is the uplink subframe of BS’s physical layer frame, from SS/MS MS _BS or RS to BS, SS/MS _BS and BS keep sending and receiving frames synchronously; (3) DL _RS is the downlink subframe of the physical layer frame of RS, from BS to SS/MS _RS or RS; (4) UL _RS is The uplink subframe of the physical layer frame of the RS is from the SS/MS _RS or the RS to the BS, and the SS/MS _RS and the RS keep sending and receiving frames synchronously.

(2) The simplified transfer mode communication system model of RS and BS, MS/SS as shown in Figure 4 and Figure 5, this transfer mode is a kind of communication system model provided by the present invention, wherein, between RS and BS, MS/SS TDD/TDM/OFDMA is used to communicate at the same frequency point, and the RS accesses the BS as an MS/SS.

The relay communication system in simplified transfer mode including BS, RS and SS/MS, the BS is provided with an interface for communicating with the RS and the user terminal, and the RS is provided with an interface for communicating with the user terminal and the BS. The user terminal is respectively provided with an interface for communicating with the RS and the BS, and the BS, the RS and the user terminal communicate through the interface, as shown in Figure 5:

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;

TDD wireless transceiver: used for wireless communication with RS or SS/MS at the same frequency point (such as f1) in TDD mode, consisting of TDD wireless transmitter physical layer unit, TDD wireless receiver physical layer unit and TDD wireless transceiver data link The road layer units are composed of:

TDD wireless transmitter physical layer unit: perform wireless communication at the same frequency point (such as f1) with the wireless receiver physical layer unit in the TDD wireless transceiver data link layer and the RS or SS/MS that can communicate with it; for simplified transfer mode, this _unit adopts channel coding and modulation methods (such as binary phase shift keying BPSK ), or use a higher transmit power than other sent data, and send it directly from the BS to the MS/SS without relaying through the RS;

TDD wireless receiver physical layer unit: perform wireless communication at the same frequency point (such as f1) with the wireless transmitter physical layer unit in the TDD wireless transceiver data link layer and the RS or SS/MS that can communicate with it;

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

The RS includes:

TDD wireless transceiver: used for wireless communication with BS or SS/MS at the same frequency point (such as f1) in TDD mode, consisting of TDD wireless transmitter physical layer unit, TDD wireless receiver physical layer unit and TDD wireless transceiver data link Composition of road layer units.

TDD wireless transmitter physical layer unit: perform wireless communication at the same frequency point (such as f1) with the wireless receiver physical layer unit in the TDD wireless transceiver data link layer and the BS or SS/MS that can communicate with it;

TDD wireless receiver physical layer unit: perform wireless communication at the same frequency point (such as f1) with the wireless transmitter physical layer unit in the TDD wireless transceiver data link layer and the BS or SS/MS that can communicate with it;

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

The SS/MS includes:

TDD wireless transceiver: used for wireless communication at the same frequency point (such as f1) with RS or BS in TDD mode, consisting of TDD wireless transmitter physical layer unit, TDD wireless receiver physical layer unit and TDD wireless transceiver data link layer unit composition.

TDD wireless transmitter physical layer unit: perform wireless communication with the same frequency point (such as f1) with the TDD wireless transceiver data link layer and the RS or BS wireless receiver physical layer unit that can communicate with it; for the simplified transfer mode, this unit Uplink random access (Random Access) slots (or contention slots) for UL _BS , such as initial Ranging contention slots and bandwidth request contention slots, or MS/SS initial access ranging Ranging, Periodic ranging Ranging, bandwidth request through the ranging subchannel Ranging Subchannel of UL _BS , adopts more reliable channel coding and modulation methods (such as binary phase shift keying BPSK) than other transmitted data, or adopts a more reliable channel than other transmitted data Higher transmit power, directly sent by MS/SS to BS, without relaying through RS;

TDD wireless receiver physical layer unit: perform wireless communication at the same frequency point (such as f1) with the wireless transmitter physical layer unit in the TDD wireless transceiver data link layer and the RS or BS that can communicate with it;

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

It can be seen that in FIG. 5 , each TDD wireless transmitter physical layer unit described in BS, RS, and SS/MS is respectively provided with a communication interface for communicating with TDD wireless receiver physical layer units in other entities. Each TDD receiver physical layer unit is respectively provided with a communication interface for communicating with TDD wireless transmitter physical layer units in other entities.

In Figure 4, (1) DL _BS is the downlink subframe of the BS’s physical layer frame, from BS to SS/MS _BS or RS; (2) UL _BS is the uplink subframe of BS’s physical layer frame, from SS/MS MS _BS or RS to BS, SS/MS _BS or SS/MS _RS and BS to keep sending and receiving frame synchronization; (3) DL _RS is the downlink subframe of the physical layer frame of RS, from BS to SS/MS _RS or RS; ( 4) UL _RS is the uplink subframe of the physical layer frame of RS, from SS/MS _RS or RS to BS.

Among them, the downlink subframe header broadcast of the DL _BS , such as Preamble (preamble), FCH (frame control header), DL-MAP (downlink mapping table), UL-MAP (uplink mapping table), is directly sent by the BS to the MS/ SS, not relayed through RS; MS/SS's initial access ranging Ranging, periodic ranging Ranging, and bandwidth request are sent directly to BS by MS/SS through the Ranging Subchannel of UL _BS , without relaying through RS .

For other downlink bursts of DL _BS , such as data packets or messages other than DL-MAP and UL-MAP, they cannot be sent directly by BS to MS/SS, but must be relayed through RS; other uplink bursts of UL _BS , such as the MS/SS's initial access ranging Ranging, periodic ranging Ranging, and bandwidth request messages, which cannot be directly sent to the BS by the MS/SS, but must be relayed through the RS.

Based on the above subframes, the BS can communicate with the RS, and then communicate with the SS/MS through the RS relay; at the same time, the information sent from the SS/MS to the BS can also be transmitted through the RS relay, thereby effectively improving Coverage of wireless communication systems.

In addition, the implementation of the present invention also needs to take into account the mutual interference in the four situations shown in Figure 5(a)-(d) due to the network system in the TDD mode adopting the same frequency communication. In the figure, TX represents the sending module, and RX represents the receiving module.

Based on the above relay communication requirements, in order for the RS to realize the relay communication function by being located between the BS and the SS/MS, it is necessary to define the corresponding physical layer frame structure. To define the frame structure, only by defining a reasonable physical layer frame structure of BS and RS can RS-based transit communication be realized smoothly and possible interference during communication can be effectively avoided.

It can be seen that the definition of the physical layer frame structure of BS and RS is the key to realize relay communication based on RS. For this reason, the definition of each frame structure will be described in detail below in view of the above-mentioned requirements for transmitting frames in the relay communication process between the BS and the RS.

In order to realize the relay communication function of RS between BS and SS/MS, it is first necessary to define the uplink and downlink subframe structures of the physical layer of BS and RS, specifically:

1. TDM technology is adopted in the downlink subframe DL _BS of the physical layer frame structure of the BS, and the DLRelay Zone (downlink relay zone) is added to define the BS downlink intermediate rotor channel and OFDMA symbol combination transmitted from the BS to the RS;

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

2. TDM technology is adopted in the uplink subframe UL _RS of the physical layer frame structure of the RS, and a DL Relay Zone (downlink relay zone) is added to define the sub-channel and OFDMA symbol combination of the DL Relay Zone of the RS receiving 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 RSs only receive the relay data of the BS in the corresponding combination of sub-channels and OFDMA symbols in the DL Relay Zone. Other sub-channels and OFDMA symbols Combinations of symbols are not arranged to receive;

3. TDM technology is adopted in the uplink subframe UL _BS of the physical layer frame structure of the BS, and the UL Relay Zone (uplink relay zone) is added to define the BS uplink intermediate rotor channel and OFDMA symbol combination transmitted from the RS to the BS;

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

4. TDM technology is adopted in the downlink subframe DL _RS of the physical layer frame structure of the RS, and the UL Relay Zone (uplink transfer zone) is added to define the sub-channel and OFDMA symbol combination of the UL Relay Zone of the RS receiving the BS;

For the case of multiple RSs, multiple RSs share the UL Relay Zone through different combinations of sub-channels and OFDMA symbols. Different RSs only transmit the relay data of the BS in the corresponding combination of sub-channels and OFDMA symbols in the DL Relay Zone. Other sub-channels and OFDMA symbols Combinations of symbols cannot be arranged to be sent;

It should be noted that during the period corresponding to the DL Relay Zone and UL Relay Zone of the BS, the SS/MS _BS and the SS/MS _RS do not arrange any combination of receiving or sending subchannels and OFDMA symbols, so as to avoid the SS/MS _BS to RS and SS /MS _RS to BS interference.

In the present invention, in order to exchange broadcast service information between the BS and the RS, it is also necessary to define the transit area in the frame structure of the BS and the RS as follows:

1. Create a DLRelay Broadcast Subchannel (downlink relay broadcast subchannel) in the DL Relay Zone of the downlink subframe DL _BS of the physical layer frame structure of the BS, which is used to define the combination of downlink subchannels and OFDMA symbols broadcast by the BS to the RS, broadcast DCD (downlink channel descriptor), UCD (uplink channel descriptor), FPC (fast power control), CLK_CMP (clock comparison) broadcast messages defined by the 802.16 standard;

2. Create a DLRelay Broadcast Subchannel (downlink relay broadcast subchannel) in the DL Relay Zone of the uplink subframe UL _RS of the physical layer frame structure of the RS, which is used to define the RS uplink subchannel and OFDMA symbols for receiving the BS downlink relay broadcast time slot Combination, to receive DCD, UCD, FPC, CLK_CMP broadcast messages defined by the broadcast 802.16 standard.

In order to facilitate the smooth access of SS/MSS to BS, the transit area in the frame structure of BS and RS needs to be defined as follows:

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

2. Define the RelayRanging TX Subchannel (relay ranging subchannel, abbreviated as RRS TX) in the DL Relay Zone of the downlink subframe DL _RS of the physical layer frame structure of the RS, which is used to define the initial access ranging Ranging and period of the RS The RS relay ranging transmission subchannel and OFDMA symbol combination of Ranging and bandwidth request;

Among them, the time-frequency relationship between the Relay Ranging Subchannel of BS and the Relay Ranging TXSubchannel of RS must be one-to-one correspondence and strict synchronization;

In the downlink subframe of the physical layer frame structure of the BS or RS, except for the DL Header (downlink frame header), the DL Relay Zone of the BS and the UL Relay Zone of the RS, the BS and different RSs use different subchannels and OFDMA symbols Combine and share the rest of the downlink subframe to avoid interference from RS to SS/MS _RS , RS to SS/MS _BS and BS to SS/MS _RS ;

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

In the present invention, in order to realize relay communication based on RS, the physical layer frame structure of BS and RS needs to be defined as follows:

1. Define the DL Header (downlink subframe header) in the downlink subframe DL _BS of the physical layer frame structure of the BS, which is the beginning of the downlink subframe and is used to define the combination of subchannels and OFDMA symbols for sending user synchronization information and sending instructions Combination of sub-channels and OFDMA symbols of the information to indicate the position and usage method profile of each combination of sub-channels and OFDMA symbols in the downlink subframe and uplink subframe of the BS physical layer frame structure. Contains preamble, FCH, DL-MAP, UL-MAP in the original 802.16OFDMA (or SOFDMA) frame, SS/MS _BS , RS and BS keep sending and receiving frame synchronization;

2. Define the DL Header (downlink subframe header) in the downlink subframe DL _RS of the physical layer frame structure of the RS, which is the beginning of the downlink subframe and is used to define the combination of subchannels and OFDMA symbols for sending user synchronization information and sending instructions Combination of sub-channels and OFDMA symbols of the information to indicate the location and usage method profile of each combination of sub-channels and OFDMA symbols in the downlink subframe and uplink subframe of the RS physical layer frame structure. Contains preamble, FCH, DL-MAP, UL-MAP in the original 802.16OFDMA (or SOFDMA) frame, SS/MS _RS and RS keep sending and receiving frame synchronization;

Among them, the DL Header of the RS is only applied to the advanced transfer mode shown in Figure 3, and lags behind the DL Header of the BS in time; during the DL Header of the RS, the downlink subframe (DL _BS ) of the BS cannot arrange any transmission subframes. Channel and OFDMA symbol combination to avoid interference from BS to SS/MS _RS ;

During the DL Header period of the RS, the downlink subframe DL _RS of the physical layer frame structure of other RS cannot arrange any combination of sending subchannels and OFDMA symbols to avoid interference from RS to SS/MS _RS ; in special cases, if the DL of different RS If the Header overlaps in time, it must be completely overlapped, strictly synchronized, and its content must be the same to avoid interference from RS to SS/MS _RS ;

3. Define DL Header RX (downlink subframe header reception) in the uplink subframe UL _RS of the physical layer frame structure of the RS, which is used to define the subchannel and OFDMA symbol combination of the DL Header of the receiving BS;

In the above frame structure, the time-frequency relationship between the DL Header of the BS and the DL Header RX of the RS must be in one-to-one correspondence and strictly synchronized.

In the present invention, in order to realize relay communication based on RS, the physical layer frame structure of BS and RS needs to be defined as follows:

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

2. Define the Ranging Subchannel (ranging subchannel) in the uplink subframe UL _RS of the physical layer frame structure of the RS, and define the initial access ranging Ranging, periodic ranging Ranging, and bandwidth request for the SS/MSS _RS Combination of RS ranging receiving subchannels and OFDMA symbols.

In the subframe structure defined above, except for the DL Relay Zone and the UL Relay Zone, the downlink subframe of the BS must not overlap with the uplink subframe of the RS, and the uplink subframe of the BS must not overlap with the downlink subframe of the RS. Avoid SS/MS _BS to SS/MS _RS and SS/MS _RS to SS/MS _BS and BS to RS and RS to BS interference;

At the same time, reserve at least TTG (transmit/receive transition gap) duration between the downlink subframe DL _BS of the BS and the uplink subframe UL _BS of _{the BS} ; RTG (Receive/Transmit Gap) duration; 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 TTG duration between the uplink subframe UL _RS of the RS and the downlink subframe DL _RS of the RS Reserve RTG duration; for the simplified transfer mode, during the TTG period of the BS, the RS cannot arrange any combination of sending subchannels and OFDMA symbols; during the RTG period of the BS, the RS cannot arrange any combination of receiving subchannels and OFDMA symbols.

Moreover, except for DL Header and Ranging Subchannel, the subchannels and OFDMA symbol combinations or Zones defined above do not necessarily have to exist in every frame.

In an OFDMA or SOFDMA system, BS, RS, and SS/MSS communicate based on the above-defined subframe structure, so that corresponding transit communication can be realized, good communication effect can be guaranteed, and various transit communication requirements can be guaranteed.

In order to facilitate the understanding of the present invention, the specific implementation of the present invention will be described in detail below in conjunction with specific application examples.

The embodiment of the physical layer frame structure of the first BS and RS provided by the present invention is shown in Fig. 6 or Fig. 7, Fig. 6 is a schematic diagram in an advanced relay mode, and Fig. 7 is a schematic diagram in a simplified relay mode.

In the figure, NULL or blank part is a part that does not arrange any receiving or sending. Among them, the DL Header in the BS downlink subframe DL _BS and the RS downlink subframe DL _RS is the Preamble, DL-MAP, and UL-MAP area of the BS in Figure 6 and Figure 7; the DL Header RX in the RS uplink subframe UL _RS These are the Preamble, DL-MAP, and UL-MAP areas of the RS in Figure 6 and Figure 7.

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 BS downlink subframe (DL _BS ), and the UL Relay Zone of the BS (that is, UL Relay 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 the DL Relay Zone and UL Relay Zone of the BS, the MS does not arrange any combination of receiving or sending subchannels and OFDMA symbols.

For the simplified transfer mode, during the TTG of the BS, the RS cannot arrange any combination of transmit subchannels and OFDMA symbols; during the RTG of the BS, the RS cannot arrange any combination of receive subchannels and OFDMA symbols.

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 present invention also provides another embodiment of the physical layer frame structure of BS and RS, as shown in Fig. 8 and Fig. 9, wherein Fig. 8 is the physical layer frame structure in the advanced transfer mode, and Fig. 9 is the frame structure in the simplified transfer mode. The physical layer frame structure.

The RRS of the BS and the RRS TX of the RS appear every other frame, such as appearing in the downlink of the N-1th frame (FrameN-1), the N+1th frame (FrameN+1), the N+3th frame (FrameN+3)... In subframe DL _RS .

The DL relay zone of the BS and the UL relay zone of the BS may not be arranged in the same frame. For example, the DL Relay Zone of the BS is arranged at the end of the downlink subframe DL _BS of the Nth frame (FrameN), and the DL Relay Zone of the RS is arranged at the head of the uplink subframe UL _RS of the Nth frame (FrameN). The UL Relay Zone of the BS is arranged at the head of the UL _BS in the uplink subframe of the N+1th frame (FrameN+1), and the UL Relay Zone of the RS is arranged in the DL _BS of the downlink subframe of the N+1th frame (FrameN+1). end. During the period corresponding to the DL Relay Zone and UL Relay Zone of the BS, the MS does not arrange any combination of receiving or sending subchannels and OFDMA symbols.

For the simplified transfer mode, during the TTG of the BS, the RS cannot arrange any combination of transmit subchannels and OFDMA symbols; during the RTG of the BS, the RS cannot arrange any combination of receive subchannels and OFDMA symbols.

The present invention will be described below in combination with specific communication process application examples.

The corresponding transfer process in the present invention is as follows:

(1) Downlink relay

The downlink transfer is divided into two stages, the first stage is: the communication process from BS to RS, and the second stage is: the communication process from RS to SS/MS; wherein, for the first stage, in Figure 3 The corresponding transfer processing methods in the advanced transfer mode and the simplified transfer mode shown in Figure 5 are exactly the same, but for the second stage, the corresponding transfer processing methods in the advanced transfer mode and the simplified transfer mode are different. The processing of the two stages will be described respectively below.

Among them, the processing process of the first stage (BS->RS) includes:

1. The BS sends the preamble in the first symbol or time slot of the downlink subframe DL _BS "DL Header";

2. RS#1 receives the preamble in the BS downlink subframe DL _BS "DL Header" through the "DL Header RX" in the RS uplink subframe UL _RS , and synchronizes with the BS;

3. The BS sends FCH, DL-MAP, and UL-MAP after the downlink subframe DL _BS "DL Header"preamble;

4. RS#1 receives the FCH, DL-MAP, and UL-MAP of the downlink subframe DL _BS "DL Header" through the "DL Header RX" in the RS uplink subframe UL _RS , and obtains each burst (burst) of the BS downlink and uplink time slot, subchannel and/or OFDMA symbol position and usage (profile) information;

5. The BS uses the "DL Relay broadcast" of the downlink subframe DL _BS "DL Relay Zone" to send a broadcast message;

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

7. RS#1 receives the broadcast message in the "DL Relay broadcast" of the BS downlink subframe (DL _BS ) "DL Relay Zone" through the "DL RB" in the RS uplink subframe UL _RS , which may contain the message that needs RS#1 Relay broadcast messages;

8. RS#1 receives the downlink relay communication data in the "DL Relay RS#1" of the BS downlink subframe DL _BS "DL Relay Zone" through the "DL Relay Zone" in the RS uplink subframe UL _RS .

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

(1) Processing of advanced transit mode

1. RS#1 sends the preamble preamble in the first symbol or time slot of the downlink subframe DL _RS "DL Header";

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

3. RS#1 sends FCH, DL-MAP, UL-MAP after the downlink subframe DL _RS "DL Header" preamble (RS#1's FCH, DL-MAP, UL-MAP can already be in the first stage 6 sent by BS to RS#1);

4. The MS/SS receives the FCH, DL-MAP, and UL-MAP of the downlink subframe DL _RS "DL Header", and obtains the time slot, subchannel and/or OFDMA symbol position and usage method of each downlink and uplink burst of RS#1 (profile) information;

5. In the downlink subframe DL _RS , RS#1 sends the downlink transit communication data traffic data (sent to RS#1 by the BS in step 6) to the MS in the time-frequency interval except the DL Header and DL Relay Zone /SS;

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

(2) Handling of Simplified Transit Mode

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

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

3. In the downlink subframe DL _RS , RS#1 sends the downlink transit communication data traffic data (sent to RS#1 by the BS in step 6) to the MS in the time-frequency interval except the DL Header and DL Relay Zone /SS;

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

(2) Uplink relay

The uplink transfer is also divided into two phases, the first phase is: the communication process from the SS/MS to the RS, and the second phase is: the communication process from the RS to the BS; wherein, for the first phase, in the figure The corresponding transfer processing methods in the advanced transfer mode and the simplified transfer mode shown in Figure 3 to Figure 5 are different, but for the second stage, the corresponding transfer processing methods in the advanced transfer mode and the simplified transfer mode are completely the same, The processing of the two stages will be described respectively below.

Among them, the processing process of the first stage (MS/SS->RS) includes:

(1) Processing of advanced transit mode

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

2. In the RS uplink subframe UL _RS , the MS/SS sends uplink communication data traffic data to RS#1 in time slots other than DL Header RX and UL Relay Zone;

3. RS#1 receives the uplink communication data trafficdata in the MS/SS uplink subframe UL _RS from the corresponding time slot.

(2) Handling of Simplified Transit Mode

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

2. In the RS uplink subframe UL _RS , the MS/SS sends uplink communication data traffic data to RS#1 in time slots other than DL Header RX and UL Relay Zone;

3. RS#1 receives the uplink communication data trafficdata in the MS/SS uplink subframe UL _RS from the corresponding time slot.

The processing of the second stage (RS->BS) includes:

1. RS#1 receives the FCH, DL-MAP, and UL-MAP of the BS downlink subframe DL _BS "DL Header", and obtains the subchannel and OFDMA symbol position and usage method (profile) information of the BS downlink and uplink bursts;

2. RS#1 sends the uplink relay communication data traffic data (sent to RS#1 by the BS in step 2) to the BS in the "UL Relay RS#1" of the RS downlink subframe DL _RS "UL Relay Zone";

3. The BS receives the uplink relay communication data in step 2 in the "UL Relay RS#1" of the uplink subframe UL _BS "UL Relay Zone".

In summary, the present invention defines the physical layer frame structure of BS and RS by introducing a mechanism combining TDM and OFDMA, thus making the present invention have the following advantages:

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

2. 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;

3. Effectively guarantee the same frequency communication between RS and BS, MS/SS in TDD mode;

4. Effectively avoid possible interference in various application scenarios.

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 (29)

1, a kind of wireless transfer communication system, it is characterized in that, comprise base station BS, user terminal and terminal RS, described BS is provided with the interface of communicating by letter with RS, described RS is provided with the interface of communicating by letter with BS with user terminal, described user terminal then is provided with the interface of communicating by letter with RS, passes through described interface communication between described BS, RS and the user terminal.

2, wireless transfer communication system according to claim 1, it is characterized in that, described BS also is provided with the interface with user terminal communication, and described user terminal is provided with the interface of communicating by letter with BS, and BS is by direct communication between described interface and the user terminal.

3, wireless transfer communication system according to claim 2, it is characterized in that, adopt between described BS, RS and the user terminal and communicate with frequency, and described BS communicates by letter with user terminal or RS by the uplink and downlink subframe respectively, and described RS communicates by letter with user terminal or BS by upper and lower subframe respectively.

4, according to claim 1,2 or 3 described wireless transfer communication system, it is characterized in that, comprise TDD transmitting set physical layer element and TDD wireless receiver physical layer element in three entities of described BS, RS and user terminal respectively, described each TDD transmitting set physical layer element provides the communication interface of communicating by letter with the TDD wireless receiver physical layer element in other entities respectively, and described each TDD receiver physical layer element provides the communication interface of communicating by letter with the TDD transmitting set physical layer element in other entities respectively.

5, wireless transfer communication system according to claim 4, it is characterized in that, also be respectively arranged with in described BS, RS and the user terminal with the local terminal entity in TDD transmitting set physical layer element and the TDD wireless receiver physical layer element TDD transceiver data-link layer unit that is connected communication, and, also be provided with among the described BS with the higher level wire transmission processing unit that is connected communication is set.

6, a kind of implementation method of wireless transfer communication is characterized in that, comprising:

A, in the descending sub frame of the base station BS physical layer frame structure of OFDMA system 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 sub-frame of uplink of terminal RS physical layer frame structure and descending sub frame, descending transfer district and up transfer district are set respectively, are used to define rotor channel and OFDMA symbol combination between BS and the RS;

B, the uplink and downlink physical layer frame based on the BS of described setting and RS between BS, RS and user terminal adopt TDD to carry out wireless transfer communication.

7, method according to claim 6, it is characterized in that, up transfer district in the physical layer frame structure of described BS and descending transfer district correspondence, and, during the descending transfer district of BS and up transfer district correspondence, user terminal is not provided with and receives or send subchannel and OFDMA symbol combination.

8, method according to claim 6, it is characterized in that, 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.

9, method according to claim 6 is characterized in that, described steps A comprises:

In the descending transfer district of the descending sub frame of the physical frame structure of BS, descending transfer broadcast channel is set, is used to define down channel and the OFDMA symbol combination that is broadcast to RS by BS, broadcast corresponding broadcasting packet;

In the descending transfer district of the sub-frame of uplink of the physical frame structure of RS, descending transfer broadcast reception channel is set, is used to define up subchannel of RS and the OFDMA symbol combination that receives the descending transfer broadcast channel of BS, receive corresponding broadcasting packet.

10, method according to claim 6 is characterized in that, described steps A also 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;

The transfer range finding is set in the descending sub frame of the physical layer frame structure of RS 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.

11, method according to claim 10 is characterized in that, the transfer range finding subchannel of described BS and the transfer range finding of RS send the corresponding setting of subchannel, and keep strict synchronism.

12, method according to claim 6 is characterized in that, described steps A also comprises:

At BS, or in the physical layer frame structure downlink frame of BS and RS descending frame head is set, specifically be arranged at the zero hour of descending sub frame, be used to define subchannel that sends user's synchronizing information and subchannel and the OFDMA symbol combination that sends indication information, with indication BS, or the position of each subchannel of BS and RS physical layer frame structure downlink frame and uplink frame and using method profile, wherein, the descending frame head of RS lags behind the descending frame head of BS in time, and during the descending frame head of RS, BS can not be provided with descending sub frame and send subchannel and OFDMA symbol combination.

13, according to claim 12ly realize wireless method for transfer, it is characterized in that described descending sub frame comprises based on terminal:

Lead code preamble in OFDM or the single carrier frame, frame control head FCH burst, descending mapping table DL-MAP and/or up mapping table UL-MAP.

14, according to claim 12ly realize wireless method for transfer, it is characterized in that described steps A also comprises based on terminal:

When having a plurality of RS, during the descending frame head of RS, other RS can not be provided with descending sub frame and send subchannel and OFDMA symbol combination;

Or

When having a plurality of RS, the descending sub frame head of different RS is overlapping fully in time, strict synchronism, and its content must be identical.

15, method according to claim 12 is characterized in that, described steps A also comprises:

The descending sub frame head is set in the downlink frame of the physical layer frame structure of RS receives, be used to define subchannel and the OFDMA symbol combination that RS receives the BS descending frame head, and the descending frame head that this descending frame head receives with BS needs overlapping and strict synchronism fully.

16, method according to claim 6 is characterized in that, described steps A also comprises:

In the sub-frame of uplink of the physical layer frame structure of BS and RS the uplink distance measuring subchannel is set, the RS range finding that is received range finding, Perodic ranging, bandwidth request that is used to define user terminal receives subchannel and OFDMA symbol combination.

17, according to each described method of claim 6 to 16, it is characterized in that described steps A also comprises:

Except that up transfer district and descending transfer district, the descending sub frame of the sub-frame of uplink of BS and the descending sub frame of RS and BS and the sub-frame of uplink of RS can not overlap each other.

18, according to each described method of claim 6 to 16, it is characterized in that described steps A comprises:

In the descending sub frame of the physical layer frame structure of BS or RS, except that the up transfer district of the descending transfer district of descending frame head, BS and RS, BS meets the remainder that descending sub frame is shared in combination with different RS by different subchannels and OFDMA.

19, according to each described method of claim 6 to 16, it is characterized in that described steps A comprises:

In the sub-frame of uplink of the physical layer frame structure of BS or RS, except that the descending sub frame head receives, the up transfer district of the descending transfer district of RS and BS, BS meets the remainder that sub-frame of uplink is shared in combination with different RS by different subchannels and OFDMA.

20, according to each described method of claim 6 to 16, it is characterized in that described steps A comprises:

The descending sub frame of BS or RS is to reserving transmissions/reception change gap TTG duration at least between the sub-frame of uplink of BS, and/or the sub-frame of uplink of BS or RS is to reservation reception/transmission change gap RTG duration at least between the descending sub frame of BS; And, for BS and user terminal can direct communication situation, during the TTG of BS, RS can not arrange any transmission subchannel and OFDMA symbol combination; During the RTG of BS, RS can not arrange any reception subchannel and OFDMA symbol combination.

21, according to each described method of claim 6 to 16, it is characterized in that described steps A comprises:

Except that descending frame head, range finding subchannel, each subchannel and OFDMA symbol combination or district do not require and must be arranged in each frame.

22, according to each described method of claim 6 to 16, it is characterized in that 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, up-downgoing transfer broadcast sub-channels, descending sub frame head, descending sub frame head receive and/or the range finding subchannel carries out the mutual of message, realize wireless transfer communication.

23, a kind of implementation method of 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;

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

By the uplink communication process of user terminal to BS:

E, by in the sub-frame of uplink of RS, sending upstream data by user terminal, and RS receives described data;

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

24, method according to claim 23 is characterized in that, is describedly also comprised to the downlink communication process of user terminal by BS:

BS and RS be respectively at first symbol of the descending sub frame head of separately 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.

25, method according to claim 24 is characterized in that, after sending described lead code, also comprises:

Described BS or RS also want transmit frame control head FCH, descending mapping table DL-MAP and up mapping table UL-MAP information, receive the RS of each information or user terminal is determined each burst according to each information time slot, subchannel and/or character position and using method information.

26, according to claim 23,24 or 25 described methods, it is characterized in that 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, and RS receives described message by the descending transfer broadcast sub-channels in the RS sub-frame of uplink.

27, according to claim 23,24 or 25 described methods, it is characterized in that described step C also comprises:

When can direct communication between BS and the user terminal, BS adopts specific chnnel coding and modulation system with the broadcasting of descending sub frame head, or adopts and be higher than the transmitting power that sends data, directly issues user terminal by BS.

28, method according to claim 23 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 time slot, subchannel and/or character position and the using method information of each burst of BS and RS.

29, method according to claim 23 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, determines each burst subchannel and character position and using method information 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 each burst subchannel and character position and using method information of BS and RS;

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

Images