CN1863002B - Wireless relay apparatus and wireless communication system - Google Patents

Abstract

The invention provides a wireless transfer device and a wireless communication system. The wireless transfer device includes a wireless transmission processing unit and a switching unit, the wireless transmission processing unit is used to receive the wireless signal sent by the source base station equipment and hand it over to the switching unit; the switching unit is used for the The wireless signal sent by the source base station equipment selects the target base station, and sends the wireless signal to the target base station. The wireless communication system includes a wireless relay device and a base station, and the group of base stations communicates with each other through the wireless relay device. The invention enables the newly established base station to support wireless connection, thereby ensuring that when the wired connection between the newly established base station and other base stations fails, it can still join the "community" smoothly, and avoids causing interference to other base stations or user stations in the coverage overlapping area . At the same time, it solves the problem of complicated layout of wired connections between base stations.

Description

Wireless relay equipment and wireless communication system

technical field

The present invention relates to the technical field of wireless communication, in particular to a wireless transfer device and a wireless communication system.

Background technique

The IEEE 802.16h standard defines the network architecture shown in Figure 1 in order to support the coexistence of the system in the same channel or adjacent channels in the license-free frequency band or shareable frequency band. These include: a base station (BS) with a shared database (Shared DB), an authentication server (such as a RADIUS server) and a shared server (such as a CIS). IEEE 802.16h defines a group of BSs networked in Ad-hoc mode as a base station "Community (Community)", and the base stations in the "community" must be interconnected with each other, such as BS1, BS2 and BS3 in Figure 1, to access To share databases and transmit coexistence-related messages, the BSs in the "community" must interconnect with the authentication server and the sharing server, and the authentication server and the sharing server are connected to each other.

IEEE 802.16 is the first broadband wireless access standard. There are two main versions: 802.16 standard broadband fixed wireless access version, 802.16-2004 (referred to as "16d") and 802.16 standard broadband mobile wireless access version, referred to as " 16e". This standard only defines the physical layer and data link layer of the base station and subscriber station. The data link layer, namely the MAC (Media Access Control) layer, is further divided into a service-specific aggregation sublayer, a MAC common part sublayer, and an encryption layer. sublayer.

According to the definition of the IEEE 802.16 standard, the structure of the 802.16 system is shown in Figure 2, and its base station can only be connected wirelessly with the subscriber station (SS). Only possible by wire. When the number of base stations in the "community" is large, the wired connection between base stations will be quite complicated.

In addition, assuming that a newly established base station cannot support wired connections, or its wired connection with other base stations fails, when the newly established base station must use license-free frequency bands or shareable frequency bands to coexist with other base stations under co-channel interference or adjacent-channel interference , because it cannot communicate with other base stations, authentication servers and shared servers in the "community", it cannot join the "community", which will cause interference to other base stations or user stations in the coverage overlapping area, as shown in Figure 1 Middle area A and B.

Moreover, if it is at the competition site of a popular international sports event, the number of wireless users will increase sharply, exceeding the capacity of the original base station. With the transfer of the game field, since the base station is mobile and temporarily installed, it is not suitable to lay cables for wired connection.

Contents of the invention

In view of the above-mentioned problems in the prior art, the object of the present invention is to provide a wireless transfer device and a wireless communication system, so that the base stations in the wireless communication system can be connected through wireless to meet the flexible requirements in the wireless communication system.

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

The present invention provides a wireless transfer device, including:

Wireless transmission processing unit: receive the wireless signal sent by the source base station equipment and hand it over to the switching unit; the wireless transmission processing unit is at least one same-frequency wireless transmission processing unit of at least one mode;

Switching unit: select a target base station for the wireless signal sent by the source base station equipment, and send the wireless signal to the target base station;

When the wireless relay equipment adopts multi-wireless transceivers to support the work of base stations in different modes in the same frequency band, it communicates with each base station equipment through a directional antenna with sufficient isolation;

When the wireless relay device adopts a single wireless transceiver to support base stations in the same frequency band and mode, it communicates with each base station device through different sub-channels or sub-carrier groups.

The wireless transmission processing unit includes:

Wireless physical layer transmission unit: communicate with the wireless data link layer and the wireless physical layer transmission unit in the base station respectively;

Wireless data link layer transmission unit: communicate with the base station through the wireless physical layer transmission unit, and communicate with other wireless link layer transmission units through the switching unit.

The switching unit is connected between the wireless physical layer transmission unit and the wireless data link layer transmission unit, or is arranged at the wireless data link layer, connected with the wireless data link layer transmission unit, or can also be arranged at the wireless data link layer transmission unit. The above link layer is connected with the processing unit of the corresponding layer.

The wireless transfer device also includes:

Subscriber station processing unit: the user terminal in the system communicates with the base station through the subscriber station processing unit and the wireless transmission processing unit, and/or the subscriber station processing unit itself communicates with the base station through the wireless transmission processing unit.

The wireless transfer device also includes:

Base station processing unit: communicate with the user station through the base station processing unit and the wireless transmission processing unit.

The switching unit also communicates with the base station in the system through the wired transmission processing unit and the communication cable.

The present invention also provides a wireless communication system, including the above-mentioned wireless transfer device and a group of base stations, and the group of base stations communicate with each other through the wireless transfer device.

In the present invention, when the wireless transfer device includes a base station processing unit, the wireless transfer device also communicates with the user stations in the system through a wireless connection, and the wireless transfer device also includes wired transmission processing The unit is used to connect with the upper level equipment through cable.

In the present invention, when the wireless transfer device includes a user station processing unit, the wireless transfer device also communicates with the user terminal in the system through a wireless connection.

The wireless relay equipment communicates with a group of base stations of different modes through wireless connections.

The set of base stations of different modes includes at least one base station of the same mode.

The wireless transfer device is fixed or mobile installed in the wireless communication system.

It can be seen from the above-mentioned technical solution provided by the present invention that the present invention enables the newly established base station to support wireless connection, thereby ensuring that when the wired connection between the newly established base station and other base stations fails, it can still join the "community" smoothly, avoiding Interference with other base stations or subscriber stations in the coverage area. At the same time, it solves the problem of complicated layout of wired connections between base stations.

Description of drawings

Figure 1 is a schematic diagram of the network structure of the 802.16h system;

FIG. 2 is a schematic diagram of the connection relationship between the base station and the user station in FIG. 1;

Fig. 3 is the 802.16h network structure diagram 1 based on RSS that the present invention provides;

Fig. 4 is the 802.16h network structure schematic diagram 2 based on RSS provided by the present invention;

5 is a schematic structural diagram of a layer two RSS system with multiple transceivers;

6 is a schematic structural diagram of a layer two RSS system with a single transceiver;

7 is a schematic structural diagram of a layer-RSS system with multiple transceivers;

FIG. 8 is a schematic structural diagram of a layer-RSS system with a single transceiver;

FIG. 9 is a schematic diagram 1 of an 802.16h network structure introducing RBS;

Figure 10 is a schematic diagram 2 of the 802.16h network structure introducing RBS;

Figure 11 is a schematic diagram 3 of the 802.16h network structure introducing RBS;

12 is a schematic structural diagram of a Layer 2 RBS system with multiple transceivers;

FIG. 13 is a schematic structural diagram of a Layer 2 RBS system with a single transceiver;

14 is a schematic structural diagram of a layer-RBS system with multiple transceivers;

FIG. 15 is a schematic structural diagram of a Layer-RBS system with a single transceiver.

Detailed ways

The core of the present invention is to introduce a transfer device into the wireless communication system, through which the wireless intercommunication between the base stations is realized, thereby facilitating the flexible dismantling and building of the base station, and simplifying the wired connection relationship between the base stations of the wireless communication system.

The relay device in the present invention includes a wireless transmission processing unit and a switching unit, and the wireless transmission processing unit includes a wireless physical layer transmission unit and a wireless data link layer transmission unit.

The specific description of each unit is as follows:

The wireless physical layer transmission unit: communicates with the wireless data link layer and the wireless physical layer transmission unit in the base station respectively;

The wireless data link layer transmission unit: communicates with the base station through the wireless physical layer transmission unit, and communicates with other wireless data link layer transmission units through the switching unit;

The switching unit: selects a target base station for the wireless signal sent by the source base station device, and sends the wireless signal to the target base station.

The relay device may also include a subscriber station or a base station function, that is to say, the relay device may be a relay subscriber station (Relay Subscriber Station, abbreviated as RSS) or a base station with a relay function ( Relay Base Station, abbreviated as RBS), and is used to solve the problem of wireless communication between base stations, so as to realize the wireless communication between base stations instead of the wired communication between the original base stations in the prior art, and solve the problem that the newly established base stations in the prior art cannot support When the wired connection or its wired connection with other base stations fails, it cannot join the "community" smoothly, resulting in interference to other base stations or user stations in the coverage overlapping area.

In the present invention, RSS can still be used as SS, and in the "community", the network access and initialization process of the subscriber station with relay function can be exactly the same as that of the common subscriber station.

In the present invention, the RBS can still be used as a BS, and can also be used to access user stations outside the coverage of the base station, so as to expand the access radius of the base station.

The specific implementation of the present invention will be described below in conjunction with the accompanying drawings.

Firstly, the implementation of the present invention by using RSS is taken as an example for description.

As shown in Figures 3 and 4, the present invention introduces a subscriber station with a relay function, namely RSS, into the network architecture defined by IEEE 802.16h, to support newly established base stations (such as BS1) and other base stations in the "community" (such as BS2 and BS3) wireless interworking.

In FIG. 3 , BS1 accesses the shared database of BS3 wirelessly through the transfer station RSS3, communicates coexistence-related messages with BS3, and accesses the shared database of BS2 through the wired connection between BS3 and BS2, the authentication server, and the coexistence server, and BS2, the authentication server and the coexistence server transmit coexistence-related messages to each other.

In the present invention, multi-hop RSS can also be introduced between the newly established base station and other base stations in the "community". For example, the wireless links of BS1 and BS2 in FIG. 3 are relayed via RSS1 and RSS2 respectively.

Multiple RSSs can also be introduced between the newly established base station in the present invention and other base stations in the "community". For example, the wireless links of BS1 and BS3 in Fig. Transit to BS3.

That is to say, as shown in Fig. 3 and Fig. 4, between the newly established base station and other base stations in the "community", a transit network composed of multiple RSSs with any topology can also be introduced to carry out communication transit processing, thereby Realize the intercommunication between the newly established base station and other base stations.

In addition, the present invention can introduce RSS between existing wired base stations, such as introducing RSS between BS2 and BS3, so that the wired part in the network is further simplified. For example, in Figure 4, BS1 accesses the shared database of BS3 wirelessly through the transfer station RSS3, communicates with BS3 about coexistence-related messages, and accesses the shared database of BS2 through the wireless link from BS3 to BS2 through RSS5, and communicates coexistence-related information with BS2 BS2 communicates coexistence-related messages with the authentication server and the coexistence server through the wired connection between the BS2 and the authentication server and the coexistence server.

The RSS described in the present invention includes the user station processing unit, that is, it has the function of the user station, therefore, the RSS can also be used to access the user station outside the coverage of the base station to expand the access radius of the base station, that is, the user station The station relays the receiving base station. For example, in Figure 4, SS1 is outside the coverage of BS2, but SS1 can access BS2 through RSS2.

The user station with relay function can be fixed or mobile, and it can be used as a user station itself. In the "community", the network access and initialization process of the user station with relay function can be exactly the same as that of the ordinary user station. RSS can be a transfer station at layer 1, a transfer station at layer 2, or even a transfer station at or above layer 3.

The structure of the RSS will be described in detail below with reference to the accompanying drawings.

The RSS is mainly composed of a switching unit and one or several wireless transceivers. The RSS exchange unit is used for data exchange between different base stations (or RBS) to support its relay function between different base stations, as well as data exchange between base station (or RBS) and user stations and between base station (or SS) and users. the

The specific structure of the RSS includes two types, one is a relay subscriber station RSS that includes multiple transceivers and can support several multi-mode base stations, and the other is a relay subscriber station that can support several single-mode base stations with a single transceiver User station RSS, the following will be explained separately:

The first kind of RSS is: as shown in Fig. 5 and Fig. 7, RSS adopts multi-radio transceiver to support BS1 (or RBS), ..., BSn (or SS) is the situation of the base stations of different modes working in the same frequency band, or BS1 (or RBS), . . . , BSn (or SS) are base stations operating in different frequency bands (eg, adjacent channels), for example, BS1 is an 802.16e base station, and BS3 is an 802.16d base station. RSS wireless transceivers 1...n can work in time-sharing, and can also use directional antennas with sufficient isolation to work at the same time, so as to overcome the interference of the same frequency or adjacent frequency, so that the wireless transceivers 1...n can work on the same channel or adjacent Establish reliable communication with BS1 (or RBS), ..., BSn (or SS) under the channel.

The second kind of RSS is: as shown in Fig. 6 and Fig. 8, RSS adopts single wireless transceiver to support BS1 (or RBS), ..., BSn (or SS) is the situation of the same mode base station working in the same frequency band. BS1 (or RBS), ..., BSn (or SS) can time-division through different burst groups (burst) or different frames (frame) with the RSS wireless transceiver to establish reliable communication under the same channel; BS1 (or RBS), ..., BSn (or SS) can also work at the same time, the RSS wireless transceiver communicates with BS1 (or RBS) through different subchannels (subchannel), subcarrier (subcarrier) groups or directional antennas with sufficient isolation ), ..., BSn (or SS), communicate under the same channel.

The RSS system can also have a structure that combines the above two situations: a certain wireless transceiver supports several base stations of the same mode, while other wireless transceivers support several base stations of different modes.

In the present invention, the structure of the RSS can be Layer 2 RSS and Layer 1 RSS according to the location of the switching unit, which will be described below in conjunction with the accompanying drawings:

(1) Layer 2 multi-transceiver RSS system structure is shown in Figure 5:

Taking the scene shown in Figure 3 as an example, BS1 is a newly built base station, and RSS3 is a subscriber station with relay function belonging to BS3, then the data sent by the user to BS3 is exchanged to its internal wireless transceiver 3 through the switching unit, and then passed The wireless channel is transmitted to BS3; on the contrary, the data sent by BS3 to the user is received by RSS3 from the wireless transceiver 3, and then exchanged to the user through the switching unit; the message sent by BS1 to BS3 is received from the wireless transceiver 1, and then exchanged to the user through the switching unit; The unit is exchanged to the wireless transceiver 3, and then transmitted to the BS3 through the wireless channel, and vice versa, so it will not be described in detail.

(2) The structure of the layer 2 single transceiver RSS system is shown in Figure 6:

Still taking the scenario shown in Figure 3 as an example, BS1 is a newly built base station, and RSS3 is a subscriber station with relay function belonging to BS3, then the data sent by the user to BS3 is exchanged to wireless transceiver 1 through the switching unit, and then through the wireless channel Pass it to BS3; on the contrary, after the data sent by BS3 to the user is received from the wireless transceiver 1, it is exchanged to the user through the switching unit. The message sent from BS1 to BS3 is received from wireless transceiver 1, switched back to wireless transceiver 1 through the switching unit, and then transmitted to BS3 through a wireless channel, and vice versa.

(3) The structure of the layer-one multi-transceiver RSS system is shown in Figure 7:

It should be noted that: for the wireless data link layer with encryption sublayer, the encryption sublayer function should be stripped from the wireless data link layer and placed between the switching unit and the wireless physical layer processing unit, because the switching unit can only process Plaintext, ciphertext cannot be processed;

In the scenario shown in Figure 3, BS1 is a newly built base station, and RSS3 is a subscriber station with a relay function belonging to BS3, then the data sent by the user to BS3 can be selected through the switching unit or an independent selection switch unit. The wireless data link layer processing unit performs processing, such as the wireless data link layer processing unit 3, and the data link frame formed after the wireless data link layer processing unit 3 is processed is exchanged to the wireless transceiver 3 through the switching unit, and then passed through the wireless channel On the contrary, after the data sent by BS3 to the user is received from the wireless transceiver 3, it is exchanged to the wireless data link layer processing unit 3 through the switching unit for processing, and then passed to the wireless data link layer processing unit 3 through the switching unit or an independent selection switch unit. user. The message sent from BS1 to BS3 is received from wireless transceiver 1, then directly switched to wireless transceiver 3 through the switching unit, and then transmitted to BS3 through a wireless channel, and vice versa.

(4) Layer-one single transceiver RSS system structure as shown in Figure 8:

Similarly, for the wireless data link layer with an encryption sublayer, the encryption sublayer function should also be stripped from the wireless data link layer and placed between the switching unit and the wireless physical layer processing unit, because the switching unit can only process plaintext, cannot handle ciphertext;

In the scenario shown in Figure 3, BS1 is a newly built base station, and RSS3 is a subscriber station with relay function belonging to BS3, then the data sent by the user to BS3 is processed by the wireless data link layer processing unit, and the formed data link frame is passed through The switching unit is switched to the wireless transceiver 1, and then transmitted to BS3 through the wireless channel; on the contrary, the data sent by BS3 to the user is received from the wireless transceiver 1, and is exchanged by the switching unit to the wireless data link layer processing unit for processing and then transmitted to user. The message sent from BS1 to BS3 is received from wireless transceiver 1, then directly switched back to wireless transceiver 1 through the switching unit, and then transmitted to BS3 through a wireless channel, and vice versa.

In the present invention, the RSS can also be set on three layers or above, and the corresponding RSS on layer three or above can use layer three for routing selection. In consideration of reducing unnecessary transit traffic or safety factors, It can also be used for communication filtering of Layer 3 or above. Its structure is similar to that of Layer 2 RSS, the difference is that the wireless transceiver of Layer 3 or above RSS includes a wireless physical layer, a wireless data link layer and a layer 3 or above processing unit, and the switching unit is a wireless routing unit. substitute.

Afterwards, the implementation of the present invention by using the RBS is taken as an example for description.

For newly established base stations, such as BS1 among Fig. 9, when there are other base stations (such as RBS3) in the "community" within its maximum coverage area, the present invention can introduce a relay network in the network architecture defined by IEEE 802.16h Functional base station RBS to support the wireless intercommunication between the newly established base station BS1 and other base stations BS2 in the "community".

For example, in Figure 9, BS1 accesses the shared database of RBS3 wirelessly through the transfer station RBS3, communicates with RBS3 about coexistence-related messages, and accesses the shared database of BS2 through the wired connection between RBS3 and BS2, the authentication server, and the coexistence server, and communicates with BS2 The authentication server and the coexistence server transmit coexistence-related messages to each other.

RBS3 can do transit between BS1 and BS2, which further simplifies the wired part of the network. For example, as shown in Figure 10, BS1 accesses the shared database of RBS3 wirelessly through the transfer station RBS3, exchanges coexistence-related messages with RBS3, accesses the shared database of BS2 through the wireless link from RBS3 to BS2, and transmits coexistence-related messages with BS2 , and then communicate coexistence-related messages with the authentication server and the coexistence server through the wired connection between the BS2 and the authentication server and the coexistence server.

The relay station RBS can also be used to access subscriber stations outside the coverage of the base station, so as to expand the access radius of the base station. For example, in Figure 9, SS1 is outside the coverage of BS1, but SS1 can access BS1 through RBS3 and enjoy the service of BS1.

A subscriber station RSS3 with a relay function can also be introduced between the newly established base station BS1 and the base station RBS3 with a relay function in the "community", as shown in Figure 11, two wireless links from BS1 to RBS3 and BS1 through RSS3 to RBS3 can Time-sharing or simultaneous transit.

The base station with relay function can be fixed or mobile, and it can be used as a base station itself.

The RBS mentioned above may be a transfer station on layer 1, a transfer station on layer 2, or even a transfer station on or above layer 3. RBS is also mainly composed of a switching unit and one or several wireless transceivers. The RBS exchange unit is used for data exchange between different base stations (to support the relay function) and data exchange between base stations and users.

For a centralized wireless network, the RBS also needs a wired transmission processing unit to be connected to the upper-level equipment via a wired cable. The upper-level equipment can be an external shared database, a base station controller, or a WiMAX access server (ASN GW).

The specific structure of the RBS includes two types, one is a transit base station RBS that includes multiple transceivers and can support several multi-mode base stations, and the other is a transit base station that can support several single-mode base stations with a single transceiver RBS, which will be explained separately below:

The first type is RBS: as shown in Figure 12 and Figure 14, adopt multi-radio transceiver to support each BSj (or RBSj) and the subscriber station SSi (or RSSi) of RBS work in the same frequency band in different modes, or each BSj (or RBSj) refers to the case of working in different frequency bands (such as adjacent channels). For example, BS1 is an 802.16e base station, BS2 is an 802.11 AP, RBS3 is an 802.16d base station, and SS is an 802.16d user station. Each wireless transceiver j of the RBS can work in time-sharing, and can also use directional antennas or smart antennas with sufficient isolation to work at the same time, so as to overcome the same frequency or adjacent frequency interference, so that each wireless transceiver j can communicate with each other under the same channel or adjacent channels. Each BSj (or RBSj) establishes reliable communication.

The second type of RBS is: as shown in Figure 13 and Figure 15, the RBS uses a single wireless transceiver to support each BSj (or RBSj) and the subscriber station SSi (or RSSi) of the RBS to work in the same frequency band in the same mode. BSj (or RB Sj) accesses the RBS in the form of a subscriber station, and each BSj (or RBSj) can time-divisionally communicate with the RBS wireless transceiver through different bursts or different frames, in the same channel Each BSj (or RBSj) can also work simultaneously, and the RBS wireless transceiver communicates with each BSj (or RBSj) through different subchannels (subchannel), subcarrier (subcarrier) groups, directional antennas or smart antennas with sufficient isolation RBSj), communicate under the same channel.

The RBS system can also adopt a structure that combines the above two situations: a certain wireless transceiver supports several base stations of the same mode, while other wireless transceivers support several base stations of different modes.

In the present invention, the structure of the RBS can be a layer-2 RBS and a layer-1 RBS according to the location of the switching unit, which will be described below in conjunction with the accompanying drawings:

(1) Layer 2 multi-transceiver RBS system structure is shown in Figure 12:

In the scenario shown in Figure 10, BS1 is a newly-built base station, RBS3 is a base station with relay function, and SS3 is a subscriber station belonging to RBS3, then the RBS3 shared database query message initiated by BS1 is received from wireless transceiver 1 and sent through the switching unit Switch to the wired transmission processing unit to process access to the external shared database of RBS3, and vice versa; the message sent by BS1 to BS2 is received from wireless transceiver 1, then exchanged to wireless transceiver 2 through the switching unit, and then transmitted to the wireless channel through the wireless channel BS2 and vice versa.

(2) Layer 2 single transceiver RBS system structure is shown in Figure 13:

In the scenario shown in Figure 10, BS1 is a newly-built base station, RBS3 is a base station with relay function, and SS3 is a subscriber station belonging to RBS3, then the RBS3 shared database query message initiated by BS1 is received from wireless transceiver 1 and sent through the switching unit Switch to the wired transmission processing unit to process access to the external shared database of RBS3, and vice versa; after the message sent by BS1 to BS2 is received from wireless transceiver 1, it is exchanged back to wireless transceiver 1 through the switching unit, and then transmitted through the wireless channel BS2 and vice versa.

(3) The structure of the layer-one multi-transceiver RBS system is shown in Figure 14:

In the scenario shown in Figure 10, RBS3 is a base station with a relay function, and SS3 is a subscriber station belonging to RBS3, then the RBS3 shared database query message initiated by BS1 is received from wireless transceiver 1, and is exchanged to the wireless data link through the switching unit After processing by the road layer processing unit 1, it is sent to the wired transmission processing unit through the switching unit or an independent selection switch unit to process and access the external shared database of RBS3, and vice versa; the message sent by BS1 to BS2 is received from wireless transceiver 1 After coming down, it is directly exchanged to the wireless transceiver 2 through the switching unit, and then transmitted to the BS2 through the wireless channel, and vice versa.

(4) Layer one single transceiver RBS system structure as shown in Figure 15:

In the scenario shown in Figure 10, RBS3 is a base station with a relay function, and SS3 is a subscriber station belonging to RBS3, then the RBS3 shared database query message initiated by BS1 is received from wireless transceiver 1, and is exchanged to the wireless data link through the switching unit After the processing by the road layer processing unit 1, it is sent to the wired transmission processing unit for processing and accessing the external shared database of RBS3, and vice versa; after the message sent by BS1 to BS2 is received from the wireless transceiver 1, it is directly exchanged back to the wireless transceiver through the switching unit. Transceiver 1, and then transmit to BS2 through the wireless channel, and vice versa.

In the present invention, the RBS can also use layer three or above layer three RBS, and the corresponding RBS can use layer three for routing selection. For the sake of reducing unnecessary transit traffic or safety factors, it can also be used as layer three or above. Communication filtering above layer 3. Its structure is similar to that of layer 2 RBS, the difference is that the wireless transceiver of layer 3 or above RBS includes wireless physical layer, wireless data link layer and layer 3 or above processing unit, and the switching unit is the wireless routing unit substitute.

To sum up, the present invention enables the newly established base station to support wireless connection, thereby ensuring that when the wired connection between the newly established base station and other base stations fails, it can still join the "community" smoothly, avoiding interference with other base stations in the coverage area. or user stations causing interference. At the same time, it solves the problem of complex layout of wired connections between base stations

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 (13)

1. A wireless transfer device, characterized in that, comprising: Wireless transmission processing unit: receive the wireless signal sent by the source base station equipment and hand it over to the switching unit; the wireless transmission processing unit is at least one same-frequency wireless transmission processing unit of at least one mode; Switching unit: select a target base station for the wireless signal sent by the source base station equipment, and send the wireless signal to the target base station; When the wireless relay equipment adopts multi-wireless transceivers to support the work of base stations in different modes in the same frequency band, it communicates with each base station equipment through a directional antenna with sufficient isolation; When the wireless relay device adopts a single wireless transceiver to support base stations in the same frequency band and mode, it communicates with each base station device through different sub-channels or sub-carrier groups. 2. The wireless transfer device according to claim 1, wherein the wireless transmission processing unit comprises: Wireless physical layer transmission unit: communicate with the wireless data link layer and the wireless physical layer transmission unit in the base station respectively; Wireless data link layer transmission unit: communicate with the base station through the wireless physical layer transmission unit, and communicate with other wireless link layer transmission units through the switching unit. 3. The wireless transfer device according to claim 2, wherein the switching unit is connected between the wireless physical layer transmission unit and the wireless data link layer transmission unit, or is arranged at the wireless data link layer, and The wireless data link layer transmission unit is connected, or it can also be arranged above the wireless data link layer and connected with the processing unit of the corresponding layer. 4. The wireless transfer device according to claim 1, 2 or 3, further comprising: Subscriber station processing unit: the user terminal in the system communicates with the base station through the subscriber station processing unit and the wireless transmission processing unit, and/or the subscriber station processing unit itself communicates with the base station through the wireless transmission processing unit. 5. The wireless transfer device according to claim 1, 2 or 3, further comprising: Base station processing unit: communicate with the user station through the base station processing unit and the wireless transmission processing unit. 6. The wireless transfer device according to claim 5, wherein the switching unit also communicates with the base station in the system through a wired transmission processing unit and a communication cable. 7. A wireless communication system, characterized by comprising the wireless transfer device according to claim 1 and a group of base stations, wherein the group of base stations communicate with each other through the wireless transfer device. 8. The wireless communication system according to claim 7, wherein when the wireless transfer device includes a base station processing unit, the wireless transfer device also communicates with the user station in the system through a wireless connection, In addition, the wireless transfer device further includes a wired transmission processing unit, which is used to connect with the upper-level equipment through a wired connection. 9 . The wireless communication system according to claim 7 , wherein when the wireless transfer device includes a user station processing unit, the wireless transfer device also communicates with the user terminal in the system through a wireless connection. 10. The wireless communication system according to claim 7, 8 or 9, characterized in that, said wireless relay equipment respectively communicates with a group of base stations of different modes through wireless connections. 11. The wireless communication system according to claim 10, wherein the group of base stations of different modes includes at least one base station of the same mode. 12. The wireless communication system according to claim 7, 8 or 9, wherein the base stations in the wireless communication system communicate with each other through a transfer network composed of a plurality of wireless transfer devices with any topology. 13. The wireless communication system according to claim 7, 8 or 9, characterized in that the wireless transfer device is fixed or mobile set in the wireless communication system.

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