CN100420236C - Switching system for WiMAX stream switching - Google Patents

Abstract

The present invention relates to a switching system for WiMAX flow switching, the core of which includes a flow processing unit and a flow switching unit; the flow switching unit receives the WiMAX flow forwarded by the flow processing unit, and exchanges the source connection identifier of the WiMAX flow into The corresponding next-hop connection identifier, and the exchanged WiMAX flow is sent to the flow processing unit through the set flow port. Through the present invention, only the mapping relationship and exchange relationship between it and the WiMAX flow can be defined, and the WiMAX flow can be used The switching technology supports intercommunication between different WiMAX nodes; moreover, multiple switching technologies can be unified into one switching technology, thereby simplifying the transmission part of WiMAX nodes and reducing costs; The interconnection between nodes reduces the intercommunication transmission delay between different WiMAX nodes. In addition, the present invention arranges the stream switching unit in the central switching board, which further reduces the complexity of WiMAX nodes and makes large-capacity WiMAX stream switching possible.

Description

Switching system for WiMAX stream switching

technical field

The invention relates to the communication field, in particular to a switching system for WiMAX stream switching.

Background technique

802.16 (commonly known as WiMAX) is the first broadband wireless access standard. The standard only defines the physical layer and the MAC layer. The MAC layer is further divided into service-specific convergence sublayer, MAC common part sublayer and encryption sublayer. This standard only defines the corresponding service-specific convergence sublayer based on ATM and packets (such as Ethernet and IP packets), and does not define the service-specific convergence sublayer for TDM services or other access technologies.

WiMAX technology is a wireless access transmission technology based on WiMAX service flow, and a main function of the service-specific convergence sublayer is flow mapping. Although WiMAX is based on traffic streams, the standard does not introduce the concept of stream switching.

According to the 802.16 standard, the WiMAX service flow is a WiMAXMAC transmission service that provides unidirectional transmission (that is, the flow has directionality). When the flow is activated, it is mapped to a 16-bit CID (Connection Identifier; connection identifier).

The WiMAX system structure of prior art one related to the present invention, as shown in Figure 1:

The existing WiMAX system includes a WiMAX base station 100, a WiMAX user station B200 and a WiMAX user station A300.

The WiMAX base station 100 includes a switching module 110, a flow mapping module 120, and a WiMAX flow processing unit 130;

If the WiMAX system supports ATM, Ethernet/IP or E1/T1 transmission, the switching module 110 generally includes an ATM switching module, a MAC switching/VLAN switching/IP switching module and a TDM switching module, and routing is performed through these switching modules to support The intercommunication between different user stations under the WiMAX base station supports the intercommunication between wired transmission ports (such as 100M Ethernet ports, E1/T1 ports) and the WiMAX stream processing unit 130 . In addition to ATM, Ethernet/IP or E1/T1 transmission technology, if other wired transmission technologies are supported, other switching modules need to be added.

The flow mapping module 120 corresponds to the service-specific convergence sublayer of the 802.16 standard, and the 802.16 MAC processing unit corresponds to the MAC common part sublayer and the encryption sublayer of the 802.16 standard. According to the different types of wired transmission technologies supported by the system, there are many types. For example, if the system supports ATM wired transmission technology, then the flow mapping module is an ATM flow mapping module; if the system supports the wired transmission technology of Ethernet, then the flow mapping module is an Ethernet/IP flow mapping module; if the system supports TDM Wired transmission technology, the flow mapping module is a TDM flow mapping module.

The WiMAX flow processing unit 130 includes an 802.16 physical layer processing subunit and an 802.16 MAC layer processing subunit.

The WiMAX subscriber station B200 includes a flow processing unit 210 and a flow mapping module 220;

The flow processing unit 210 includes an 802.16 physical layer processing subunit and an 802.16 MAC layer processing subunit.

The flow mapping module 220 is the same as the flow mapping module 120 in the base station 100, corresponding to the service-specific convergence sublayer of the 802.16 standard, and the 802.16 MAC layer processing subunit corresponds to the MAC common part sublayer and the encryption sublayer of the 802.16 standard. It also has many types according to the types of wired transmission technologies supported by the system.

The WiMAX subscriber station A300 has the same modules as the WiMAX subscriber station B200.

In conjunction with Fig. 1, take Ethernet user A sending Ethernet frames to Ethernet user B as an example to illustrate the process of information transmission between modules in the existing WiMAX system:

First, the Ethernet flow mapping module of WiMAX user station A maps the Ethernet frame of user A to a WiMAX flow whose connection identifier is CID2 according to the source MAC address and VLAN ID of the Ethernet frame header of user A, and maps the WiMAX The stream is uploaded to the stream processing unit of the user station.

Next, after the stream processing unit processes the WiMAX stream, it sends the WiMAX stream whose connection ID is CID2 to the WiMAX base station through a wireless channel.

Subsequently, the stream processing unit of the WiMAX base station processes the WiMAX stream whose connection ID is CID2, and uploads the stream to the Ethernet stream mapping module of the base station.

Next, the Ethernet flow mapping module of the base station maps the WiMAX flow whose connection identifier is CID2 back to an Ethernet frame, and transmits it to the MAC/VLAN/IP switching module.

When the base station confirms that user A performs the Internet access service, the Ethernet frame is switched to the upper-level processing device through the MAC/VLAN/IP switching module for processing.

When the base station confirms that user A performs service interworking with user B, according to the 802.16 standard, the WiMAX service flow is a WiMAX MAC transmission service that provides unidirectional transmission (that is, the flow has directionality), so the MAC/VLAN/IP The switching module switches the Ethernet frame to another Ethernet flow mapping module of the base station.

Then, another Ethernet flow mapping module of the base station maps the Ethernet frame to another WiMAX flow (identified by CID1) according to the destination MAC address and VLAN identification of the Ethernet frame header, and passes the flow data identified as CID1 through the wireless channel Send to the stream processing unit of WiMAX user station B.

The flow processing unit of the WiMAX user station B processes the Ethernet frame and sends it to the Ethernet flow mapping module of the WiMAX user station A.

Finally, the Ethernet flow mapping module of the WiMAX user station B maps the WiMAX flow CID1 back to an Ethernet frame and transmits it to user B.

It can be seen from the above-mentioned technical solutions of the prior art that when the prior art supports the wired transmission technology of Ethernet, the Ethernet frames need to be exchanged through the MAC/VLAN/IP switching module, so that different user stations under the WiMAX system can be realized. intercommunication, or realize the business of users surfing the Internet.

If the existing technology needs to support another wired transmission technology, such as ATM, an ATM switching module is required to switch ATM cells.

The WiMAX system structure of the prior art 2 related to the present invention, as shown in FIG. Various high-capacity switching modules for service switching are arranged in the central switching board 500 outside the WiMAX base station, and the central switching board 500 and the WiMAX base station are interconnected through a backplane. The flow transmission relationship among the various modules of the system is similar to the prior art 1, and will not be described in detail.

As can be seen from the technical solutions of the prior art, it has the following deficiencies:

1. Every time a wired transmission technology is added, a new switch module needs to be added, and the scalability is poor.

2. The more types of wired transmission technologies supported, the more types of switch modules are required, which makes the wired transmission part of WiMAX base stations more complicated, with many interconnection lines and high cost.

3. In order to support intercommunication between different WiMAX user stations, user data packets or service frames need to go through four flow mapping processes and one service exchange process, so the transmission delay is relatively large.

Contents of the invention

The purpose of the present invention is to provide a switching system for WiMAX stream switching, which solves the problem of poor system scalability in the prior art by the present invention; solves the problem that the types of switching modules required are also limited due to the many types of wired transmission technologies supported. The more the WiMAX base station wired transmission part becomes complicated, there are many interconnection lines and the problem of high cost; it solves the problem that in the prior art, in order to support the intercommunication between different WiMAX user stations, user data packets or service frames need to go through Four flow mapping processes and one service switching process lead to a large transmission delay.

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

A switching system for WiMAX stream switching provided by the present invention includes:

The flow processing unit is used to process and forward the WiMAX flow; the flow processing unit includes: a first flow processing unit, which receives the WiMAX flow transmitted by the sending end, and sends the WiMAX flow to the flow exchange unit; the second flow processing unit, receiving the WiMAX stream transmitted by the stream switching unit, processing the WiMAX stream, and sending the processed WiMAX stream to a receiving end;

A flow switching unit, configured to receive the WiMAX flow forwarded by the flow processing unit through the set flow port, and exchange the source connection identifier of the WiMAX flow with the next-hop connection identifier of the source connection identifier, and set Send the switched WiMAX stream to the stream processing unit through a predetermined stream port.

The first stream processing unit sends the WiMAX stream to the stream switching unit according to the stream port corresponding to the source connection identifier of the received WiMAX stream.

Wherein, the stream port between the stream switching unit and the stream processing unit is defined according to the wireless resources supported by the system.

Wherein, the wireless resources include any one or more of the following: WiMAX sites, sectors, frequency points and/or sub-channels.

Wherein, the switching system also includes:

A sender stream mapping unit and a sender stream processing unit;

The flow mapping unit at the sending end is configured to receive a service frame, data packet, cell or time slot sent by a user at the sending end, and map the service frame, data packet, cell or time slot into a corresponding WiMAX flow, Then send the WiMAX stream to the stream processing unit at the sending end;

The stream processing unit at the sending end is configured to receive the WiMAX stream transmitted by the stream mapping unit at the sending end, process the WiMAX stream and send it to the first stream processing unit.

Wherein, the switching system also includes:

A receiving-end stream processing unit and a receiving-end stream mapping unit;

The stream processing unit at the receiving end is configured to receive the WiMAX stream transmitted by the second stream processing unit, process the WiMAX stream, and transmit it to the stream mapping unit at the receiving end;

The receiving-end flow mapping unit is configured to receive the WiMAX flow transmitted by the receiving-end flow processing unit, and map the WiMAX flow into corresponding service frames, data packets, cells or time slots, and transmit them to the receiving-end user .

Wherein, the sending end flow processing unit, the first flow processing unit, the second flow processing unit and the receiving end flow processing unit respectively include a MAC layer processing subunit and a physical layer processing subunit;

The MAC layer processing subunit of the flow processing unit at the sending end receives the WiMAX flow sent by the flow mapping unit at the sending end, and communicates with the physical layer processing subunit of the flow processing unit at the sending end; the physical layer of the flow processing unit at the sending end The processing subunit communicates with the physical layer processing subunit of the first stream processing unit through a wireless channel; the physical layer processing subunit of the first stream processing unit communicates with the MAC layer processing subunit of the first stream processing unit; the The MAC layer processing subunit of the first stream processing unit communicates with the stream switching unit;

The MAC layer processing subunit of the second stream processing unit communicates with the stream switching unit and the physical processing subunit of the second stream processing unit; the physical processing subunit of the second stream processing unit communicates with the physical processing subunit of the second stream processing unit through a wireless channel The physical processing subunit of the stream processing unit at the receiving end communicates; the physical processing subunit of the stream processing unit at the receiving end communicates with the MAC layer processing subunit of the stream processing unit at the receiving end; the MAC of the stream processing unit at the receiving end The layer processing subunit communicates with the stream mapping unit at the receiving end.

Wherein, the switching system further includes a first flow mapping unit and/or a second flow mapping unit, configured to receive the WiMAX flow transmitted by the flow switching unit through a set flow port, and map the WiMAX flow back to The service frame of the sending end user is sent to the superior processing unit.

Wherein, the flow ports between the flow switching unit and the first flow mapping unit and/or the second flow mapping unit are defined according to external wired ports of the flow mapping unit.

Wherein, the stream switching unit, the first stream processing unit, the second stream processing unit, and the first stream mapping unit and/or the second stream mapping unit are arranged in the interface board;

or,

The flow switching unit is arranged in the central switching board, the first flow processing unit, the second flow processing unit, and the first flow mapping unit and/or the second flow mapping unit are respectively arranged in the interface board; the The central switch board is interconnected with the interface board through a backplane bus.

It can be seen from the above-mentioned technical solution provided by the present invention that the present invention includes a flow processing unit and a flow switching unit; the flow switching unit receives the WiMAX flow forwarded by the flow processing unit through a set flow port, and transfers the WiMAX The source connection identifier of the stream is exchanged for the next hop connection identifier of the source connection identifier, and the exchanged WiMAX stream is sent to the stream processing unit through the set stream port. Through the present invention, various The switching technology is unified into one switching technology, so that the wired transmission part of the WiMAX base station is simplified, the interconnection is less, and the cost is reduced; through the present invention, it is only necessary to define its mapping relationship and switching relationship with the WiMAX flow, and it can support different Intercommunication between WiMAX nodes, or user's Internet access business, so the system has good scalability; through the present invention, only two flow mappings and one WiMAX flow exchange can realize the intercommunication between different WiMAX nodes, thereby reducing Intercommunication transmission delay between different WiMAX nodes is reduced.

Description of drawings

FIG. 1 is a schematic structural diagram of a WiMAX system in prior art 1;

FIG. 2 is a schematic structural diagram of a WiMAX system in the prior art 2;

Fig. 3 is a schematic diagram of the system structure of the first embodiment of the present invention;

Fig. 4 is a schematic diagram of the system structure of the second embodiment of the present invention.

Detailed ways

The present invention provides a switching system for WiMAX flow switching, the core of which includes: a flow processing unit for processing and forwarding a WiMAX flow; the flow switching unit receives the WiMAX flow forwarded by the flow processing unit through a set flow port , and exchange the source connection identifier of the WiMAX flow with the next-hop connection identifier of the source connection identifier, and send the exchanged WiMAX flow to the flow processing unit through a set flow port.

The first embodiment provided by the present invention is shown in Figure 3:

The system includes Node A 410 , Node B 420 , and Node C 430 .

The node A410 includes a flow mapping unit 411 and a flow processing unit 412;

The Node B 420 includes a flow mapping unit 421 and a flow processing unit 422;

The node C430 includes a first flow processing unit 431 , a flow switching unit 432 , a second flow processing unit 433 , a first flow mapping unit 434 and a second flow mapping unit 435 , and they are all set in the same WiMAX interface board.

Wherein, each flow mapping unit 440 includes each flow mapping unit of the wired transmission technology supported by the system, such as an Ethernet/IP flow mapping unit, an ATM flow mapping unit, a TDM flow mapping unit and/or other flow mapping units. Each WiMAX flow processing unit includes an 802.16 physical layer processing subunit and an 802.16MAC layer processing subunit.

The flow switching unit 432 in the node C includes a plurality of different flow ports, which are respectively connected with the MAC layer processing subunit of the first flow processing unit 431 in the node C and the first flow mapping unit 434 and the second flow mapping unit 435 are connected. The stream ports connected by the WiMAX stream switching unit 432 to the first stream mapping unit 434 and the second stream mapping unit 435 can be defined according to the external wired ports supported by this node; the WiMAX stream switching unit 432 and the first stream in the node C The stream ports connected between the processing unit 431 and the second stream processing unit 432 can be defined according to wireless resources such as WiMAX sites, sectors, frequency points, and sub-channels supported by the system.

For example, assume that a WiMAX node C is a WiMAX base station, supports one site, each site has 4 sectors, each sector has two frequency points, does not support sub-channels, supports two ATM ports, and two Ethernet interfaces , two E1 ports, WiMAX stream port definition and planning as shown in Table 1 can be done, and the stream port number can be represented by 4 bits.

site number sector number Frequency number ATM port number Ethernet port number E1 port number Stream port number (Port) 1 1 1 - - - 0 1 1 2 - - - 1 1 2 1 - - - 2 1 2 2 - - - 3 1 3 1 - - - 4 1 3 2 - - - 5 1 4 1 - - - 6 1 4 2 - - - 7

- - - 1 - - 8 - - - 2 - - 9 - - - - 1 - 10 - - - - 2 - 11 - - - - - 1 12 - - - - - 2 13

Table I

Each stream processing unit includes an 802.16 MAC layer processing subunit and an 802.16 physical layer processing subunit respectively.

The 802.16MAC layer processing subunit of the flow processing unit 412 in the node A410 receives the WiMAX flow sent by the flow mapping unit 411 in the node A410, and communicates with the 802.16 physical layer processing subunit of the flow processing unit 412; the flow The 802.16 physical layer processing subunit of the processing unit 412 communicates with the 802.16 physical layer processing subunit of the first stream processing unit 431 in the node C430 through a wireless channel; the 802.16 physical layer processing subunit of the first stream processing unit 431 communicates with the The 802.16MAC layer processing subunit of the first stream processing unit 431 communicates; the 802.16MAC layer processing subunit of the first stream processing unit 431 communicates with the stream switching unit.

The 802.16MAC layer processing subunit of the second stream processing unit 431 communicates with the stream switching unit and the 802.16 physical layer processing subunit of the second stream processing unit 433 in node C430; the second stream processing unit 433 The 802.16 physical layer processing subunit communicates with the 802.16 physical layer processing subunit of the flow processing unit 422 in the Node B420 through a wireless channel; the 802.16 physical layer processing subunit of the flow processing unit 422 communicates with the flow processing unit 422 The 802.16MAC layer processing subunit communicates; the 802.16MAC layer processing subunit of the flow processing unit 422 communicates with the flow mapping unit 421 in the Node B 420 .

When the service flow is established, the WiMAX system node C first allocates the CID (connection identifier) of the service flow between user A at the sending end and user B at the receiving end, and establishes a flow mapping table. And, while assigning the CID, the mapping relationship between the CID and the flow destination port is configured, and a flow switching table is established.

The situation when the present invention is applied is still described in conjunction with FIG. 3 .

First, describe the situation of using the present invention to realize service intercommunication between different nodes. Assuming that node A420 is regarded as the sending end, and node B is regarded as the receiving end, the process of utilizing the present invention to realize service interoperability between different nodes is as follows:

User A sends a service frame, data packet, cell or time slot to node A420

The node A420 searches the flow mapping table through its flow mapping unit 421 to map the service frame, data packet, cell or time slot into a WiMAX service flow, and the CID of the WiMAX service flow is the CID allocated to the user A at the sending end , such as CID2, and send it to the corresponding stream processing unit 422.

The stream processing unit 422 successively processes the 802.16MAC layer processing subunit and the 802.16 physical layer processing subunit, and then sends the processed WiMAX service flow (the CID of the WiMAX service flow is the CID allocated to the sending end user A) to the node C430.

The 802.16 physical layer processing subunit of the first stream processing unit 431 in the node C430 receives the WiMAX service flow (the CID of the WiMAX service flow is the CID allocated to the sending end user A) through the wireless channel, and transmits it to the 802.16MAC after processing The layer processing subunit performs processing, and sends the processed WiMAX service stream to the flow switching unit 432 through the 802.16MAC layer processing subunit.

After the stream switching unit 432 receives the WiMAX service stream (the CID of the WiMAX service stream is the CID allocated to the user A at the sending end) through the defined stream port (Port2) with the first stream processing unit 431, first, according to the The CID in the MAC frame header of the WiMAX service flow that the flow port comes in searches the flow exchange table, and obtains the flow destination port and the next hop CID corresponding to the CID; then decides whether to modify the MAC according to whether the next hop CID is valid For the CID in the frame header, if the CID of the next hop, such as CID1, is within the range of the CID value assigned to the receiving end, it means that the CID value is valid, so the CID in the MAC frame header of the WiMAX service flow is exchanged for the receiving end The CID allocated by the user, such as exchanging CID2 for CID1, and then transmitting the exchanged WiMAX service flow (the CID of the WiMAX service flow is CID1) to the second flow in node C from the corresponding flow port (Port1 in the figure) processing unit 433 .

The second flow processing unit 433 receives the WiMAX service flow (the CID of the WiMAX service flow is CID1), processes it successively through the 802.16 MAC layer processing subunit and the 802.16 physical layer processing subunit, and sends it to the Node B 410 through a wireless channel.

The stream processing unit 412 of the Node B 410 receives the WiMAX service stream (the CID of the WiMAX service stream is CID1) via the wireless channel, and sends it to the corresponding Stream mapping unit 411 .

The flow mapping unit 411 searches the flow mapping table and maps the WiMAX service flow (the CID of the WiMAX service flow is CID1) into corresponding service frames, data packets, cells or time slots, and transmits them to user B.

The foregoing describes the situation of realizing service intercommunication among different nodes by using the present invention. The situation of using the present invention to realize the user surfing the Internet is still described below in conjunction with FIG. 3 .

Assume that user A at the sending end sends a service frame, data packet, cell or time slot to node A.

Assume that user A at the sending end sends a service frame, data packet, cell or time slot to node A420.

The node A420 searches the flow mapping table through its flow mapping unit 421 to map the service frame, data packet, cell or time slot into a WiMAX service flow, and the CID of the WiMAX service flow is the CID allocated to the user A at the sending end , such as CID2, and send it to the corresponding stream processing unit 422.

The stream processing unit 422 successively processes the 802.16MAC layer processing subunit and the 802.16 physical layer processing subunit, and then sends the processed WiMAX service flow (the CID of the WiMAX service flow is the CID allocated to the sending end user A) to the node C430.

The 802.16 physical layer processing subunit of the first stream processing unit 431 in the node C430 receives the WiMAX service flow (the CID of the WiMAX service flow is the CID allocated to the sending end user A) through the wireless channel, and transmits it to the 802.16MAC after processing The layer processing subunit performs processing, and sends the processed WiMAX service stream to the flow switching unit 432 through the 802.16MAC layer processing subunit.

The flow switching unit 432 receives the WiMAX service flow (the CID of the WiMAX service flow is the CID allocated to the user A at the sending end) through the defined flow port (such as the Port2 flow port in Figure 3) between the first flow processing unit 431 and the flow port defined in FIG. Afterwards, at first, according to the CID in the MAC frame header of the described WiMAX service flow that comes in from the flow port, search the flow switching table, obtain the flow destination port and the next hop CID corresponding to the CID; then according to whether the next hop CID Effectively decide whether to modify the CID in the MAC frame header. If the next-hop CID is not within the range of assigned CID values, it means that the next-hop CID is invalid, so the WiMAX service flow (the CID of the WiMAX service flow is sent to The CID allocated by the end user A) is transmitted from the corresponding flow port (such as the Port10 flow port in FIG. 3 ) to the upper-level processing device.

Corresponding to the first embodiment of the present invention, only any one of the first stream processing unit 431 or the second stream processing unit 433 in the first embodiment can be used to complete the functions of the first stream processing unit 431 and the second stream processing unit 433 ; It is also possible to use only any one of the first stream mapping unit 434 or the second stream mapping unit 435 in the first embodiment to complete the functions of the first stream mapping unit 434 and the second stream mapping unit 435 .

The second embodiment of the present invention, as shown in Figure 4, differs from the solution of the first embodiment in that:

In this solution, the first stream processing unit, the second stream processing unit, the stream switching unit, the first stream mapping unit, and the second stream mapping unit are no longer arranged on the same interface board of node C. In the second embodiment, the flow switching unit is set in the central switching board 510 of node C, and the first flow processing unit and the second flow processing unit, the first flow mapping unit and the second flow mapping unit are respectively set in the node C In different interface boards in C, for example, the first stream mapping unit and the second stream mapping unit are set in the wired interface board, and the first stream processing unit and the second stream processing unit are set in the WiMAX wireless interface board.

The WiMAX flow switching unit of the central switching board supports service switching between wired or WiMAX wireless interface boards, and between wired and WiMAX wireless interface boards.

The situation when the second embodiment is applied is the same as that of the first embodiment, and will not be described in detail.

The third embodiment provided by the present invention is different from the first embodiment in that: the interface board of node C does not include the first flow mapping unit and the second flow mapping unit, and only the flow switching unit is configured with the interface board The stream ports between the first stream processing unit and the second stream processing unit in the board, such as the Port1 and Port2 stream ports in the figure.

The difference between the fourth embodiment provided by the present invention and the second embodiment is that it does not include the first flow mapping unit and the second flow mapping unit, and the interface board for setting the flow mapping unit, and only configures the flow switching unit It is a stream port between the first stream processing unit and the second stream processing unit.

When the third and fourth embodiments are applied, the user can only realize the service intercommunication between different user stations. The specific implementation process is the same as the relevant description in the first embodiment, and will not be described in detail again.

It can be seen from the above-mentioned technical solution provided by the present invention that the system of the present invention includes a flow processing unit and a flow switching unit; the flow switching unit receives the WiMAX flow forwarded by the flow processing unit through the set flow port, and exchanging the source connection identifier of the WiMAX stream with the next-hop connection identifier of the source connection identifier, and sending the exchanged WiMAX stream to the stream processing unit through a set stream port; through the present invention, Only need to define its mapping table and switching table with WiMAX flow, WiMAX flow switching technology can be used to switch and support intercommunication between different WiMAX nodes; moreover, multiple switching technologies can be unified into one switching technology, so that WiMAX nodes The transmission part of the WiMAX base station, such as the wired transmission part of the WiMAX base station, is simplified, and the interconnection is less, which reduces the cost; and the intercommunication between different WiMAX nodes can be realized only through two flow mappings, thereby reducing the number of different WiMAX nodes. The intercommunication transmission delay between them.

In addition, in the second embodiment, the introduction of the central switching board further reduces the complexity of the WiMAX interface board, and the central switching board also makes it possible to exchange large-capacity WiMAX streams.

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 As an alternative, for example, it is not limited to setting the flow switching unit, flow mapping unit or flow processing unit on the same interface board of the node, or it is not limited to setting the flow switching unit, flow mapping unit or flow processing unit on the In different interface boards, or not limited to arranging the flow switching unit in the central switching board, all should be covered by 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 (10)

1. a switching system that is used for the exchange of WiMAX stream is characterized in that, comprising:

Stream processing unit is used for handling and forwarding WiMAX stream; This stream processing unit comprises: first-class processing unit, and the WiMAX that receiving end/sending end transmits flows, and described WiMAX is spread give described stream crosspoint; Second stream processing unit receives the WiMAX stream that described stream crosspoint transmits, and the described WiMAX after described WiMAX stream is handled and will be handled spreads and gives receiving terminal;

The stream crosspoint, be used for receiving the WiMAX stream that described stream processing unit is transmitted by the flow port of setting, and with the source connection identifier of described WiMAX stream is exchanged for described source connection identifier next jumps connection identifier, and spread by the flow port the set WiMAX after with described exchange and to give described stream processing unit.

2. switching system according to claim 1 is characterized in that,

Described first-class processing unit is according to the flow port of the source connection identifier correspondence of the WiMAX stream that receives, and described WiMAX spread give described stream crosspoint.

3. switching system according to claim 2 is characterized in that, the flow port between described stream crosspoint and described stream processing unit defines according to the Radio Resource of system's support.

4. switching system according to claim 3 is characterized in that, described Radio Resource comprise following any one or multiple: WiMAX website, sector, frequency and subchannel.

5. switching system according to claim 4 is characterized in that, also comprises:

Transmitting terminal stream map unit and transmitting terminal stream processing unit;

Described transmitting terminal stream map unit, be used for traffic frame, packet, cell or time slot that the receiving end/sending end user sends, and be corresponding WiMAX stream with described traffic frame, packet, cell or time slot mapping, described WiMAX is spread give the transmitting terminal stream processing unit then;

Described transmitting terminal stream processing unit is used for the WiMAX stream that receiving end/sending end stream map unit transmits, and sends to described first-class processing unit after described WiMAX stream handled.

6. switching system according to claim 4 is characterized in that, also comprises:

Receiving terminal stream processing unit and receiving terminal stream map unit;

Described receiving terminal stream processing unit is used to receive the WiMAX stream that described second stream processing unit transmits, and after described WiMAX stream is handled, sends described receiving terminal stream map unit to;

Described receiving terminal stream map unit is used to receive the WiMAX stream that described receiving terminal stream processing unit transmits, and described WiMAX stream is mapped as corresponding business frame, packet, cell or time slot, sends the receiving terminal user to.

7. switching system according to claim 6 is characterized in that:

Described transmitting terminal stream processing unit, first-class processing unit, second stream processing unit and receiving terminal stream processing unit comprise MAC layer processing subelement and physical layer process subelement respectively;

The MAC layer of described transmitting terminal stream processing unit is handled the WiMAX stream that subelement receiving end/sending end stream map unit sends, and communicates with the physical layer process subelement of transmitting terminal stream processing unit; The physical layer process subelement of described transmitting terminal stream processing unit communicates by the physical layer process subelement of wireless channel and described first-class processing unit; The physical layer process subelement of described first-class processing unit and the MAC layer of first-class processing unit are handled subelement and are communicated; The MAC layer of described first-class processing unit is handled subelement and described stream crosspoint communicates;

The physical treatment subelement that the MAC layer of described second stream processing unit is handled subelement and the described stream crosspoint and second stream processing unit communicates; The physical treatment subelement of described second stream processing unit communicates by the physical treatment subelement of wireless channel and described receiving terminal stream processing unit; The physical treatment subelement of described receiving terminal stream processing unit and the MAC layer of receiving terminal stream processing unit are handled subelement and are communicated; The MAC layer of described receiving terminal stream processing unit handles subelement and receiving terminal stream map unit communicates.

8. according to any described switching system of claim 2 to 6, it is characterized in that:

Also comprise the first-class map unit and/or the second stream map unit, be used for receiving the WiMAX stream that described stream crosspoint transmits, and described WiMAX is flowed the traffic frame that mapping postbacks the sending end user, send to higher level's processing unit then by the flow port of setting.

9. switching system according to claim 8 is characterized in that:

Flow port between described stream crosspoint and described first-class map unit and/or the second stream map unit defines according to the external cable port of stream map unit.

10. switching system according to claim 9 is characterized in that:

Described stream crosspoint, described first-class processing unit, second stream processing unit, and the first-class map unit and/or the second stream map unit are arranged in the interface board;

Or,

Described stream crosspoint is arranged in the power board of center, described first-class processing unit, second stream processing unit, and the described first-class map unit and/or the second stream map unit are separately positioned in the interface board; Described center power board and described interface board interconnect by core bus.

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