WO2006116923A1

WO2006116923A1 - A SWITCH SYSTEM AND METHOD FOR SWITCHING A WiMAX STREAM

Info

Publication number: WO2006116923A1
Application number: PCT/CN2006/000824
Authority: WO
Inventors: Ruobin Zheng
Original assignee: Huawei Technologies Co., Ltd.
Priority date: 2005-04-29
Filing date: 2006-04-27
Publication date: 2006-11-09
Also published as: CN100420236C; CN1855882A

Abstract

The core of a switch system and method for switching a WiMAX stream, includes: a stream processing unit and a stream switch unit; receiving a WiMAX stream transmitted by the stream processing unit through the stream switch unit, and switching a connection identifier of the WiMAX stream to a connection identifier corresponding to the next hop, and transmitting the switched WiMAX stream to the stream processing unit through the set stream port. By the invention, as long as define a mapping and switching relationship between it and the WiMAX stream, it can adopt the WiMAX stream switching to support the interoperability between different WiMAX nodes; then, it can unite a variety of switching technology into a switching technology, thereby simplify the transmitting port of the WiMAX node and reduce the cost; further, only map the stream twice, it can realize the interoperability between different WiMAX nodes, thereby decrease the interoperability transport time delay between different WiMAX nodes. In addition, the invention set the stream switching unit in the central switch board so that lower the complexity of the WiMAX node and make bulky WiMAX stream switching possible.

Description

TECHNICAL FIELD The present invention relates to the field of communications, and in particular, to a switching system and method for WiMAX (Worldwide Interoperability for Microwave Access) flow switching.

Background technique

802.16 (commonly known as WiMAX) is the first broadband wireless access standard. This standard only defines the physical layer and MAC (Media Access Control) layer. The MAC layer is further divided into a service specific convergence sublayer, a MAC common partial sublayer, and an encryption sublayer. The standard is based only on ATM (Asynchronous Transfer Mode) and message-based (such as Ethernet and IP (Internet Protocol) packets). The corresponding service-specific convergence sub-layer is defined. It is not defined for TDM ( Time Division Multiplexing, a service-specific convergence sublayer of services or other access technologies.

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

According to the 802.16 standard, the WiMAX service flow is a WiMAX MAC transmission service that provides one-way transmission (i.e., the flow is directional), and the flow is activated to be mapped with a 16-bit CID (Connection Identifier).

A prior art WiMAX system architecture related to the present invention is shown in Figure 1: The existing WiMAX system includes a WiMAX base station 100, a WiMAX subscriber station B200, and a WiMAX subscriber station A300.

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

If the WiMAX system supports ATM, Ethernet (Ethernet)/IP or E1/T1 transmission, the switching module 110 usually includes an ATM switching module, a MAC switching/VLAN (Virtual Local Area Network) switching/IP switching module, and a TDM. The switching module performs routing through these switching modules to support interworking between different user stations under the WiMAX base station and support wired The transmission port (for example, a 100M Ethernet port, an E1/T1 port) and the WiMA stream processing unit 130 communicate with each other. In addition to ATM, Ethernet/IP or E1/T1 transmission technologies, if other wired transmission technologies are supported, additional switching modules need to be added.

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

The stream mapping module 120 corresponds to a service specific convergence sublayer of the 802.16 standard, and the 802.16 MAC processing unit corresponds to a MAC common part sublayer and an encryption sublayer of the 802.16 standard. There are many different types depending on the type of wired transmission technology supported by the system. For example, if the system supports ATM wired transmission technology, the flow mapping module is an ATM flow mapping module; if the system supports Ethernet wired transmission technology, the flow mapping module is an Ethemet/IP flow mapping module; if the system supports TDM For the wired transmission technology, the flow mapping module is a TDM flow mapping module.

The WiMAX subscriber station B200 includes a stream processing unit 210 and a stream mapping module 220; wherein the stream 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, the 802.16 MAC layer processing subunit corresponds to the 802.16 standard MAC common part sublayer and the encryption sublayer. It also has many types depending on the type of wired transmission technology supported by the system.

The WiMAX subscriber station A300 is identical to the module included in the WiMAX subscriber station B200.

Referring to FIG. 1 , an Ethernet user A sends an Ethernet frame to an Ethernet user B as an example to illustrate the process of information transmission between modules in an existing WiMAX system:

First, the Ethernet stream mapping module of the WiMAX subscriber station A 300 maps the Ethernet frame of the user A into a WiMAX stream with the connection identifier CID2 according to the source MAC address and the VLAN identifier of the Ethernet frame header of the user A, and the The WiMAX stream is uploaded to the stream processing unit of subscriber station A 300.

Then, the stream processing unit processes the WiMAX stream, and sends a WiMAX connection with the connection CID2 to the WiMAX base station 100 via the wireless channel.

Then, the stream processing unit 130 of the WiMA base station identifies the connection as CID2. The WiMA stream is processed and uploaded to the Ethernet stream mapping module of the base station.

Then, the Ethernet stream mapping module of the base station maps the WiMAX stream with the connection identifier CID2 back to the Ethernet frame and transmits it to the MAC/VLAN/IP switch module.

When the base station 100 confirms that the user A performs the Internet access service, the Ethernet frame is exchanged to the upper processing device (not shown) for processing by the MAC/VLAN/IP switching module.

When the base station 100 confirms that the user A performs service interworking with the user B, according to the 802.16 standard,

The WiMAX service flow is a WiMAX MAC transmission service that provides one-way transmission (ie, the flow is directional), so the MAC/VLAN/IP switching module exchanges the Ethernet frame to another Ethernet flow mapping module of the base station. .

Then, another Ethernet stream mapping module of the base station maps the Ethernet frame to another WiMAX stream (identified by CID1) according to the destination MAC address and VLAN identifier of the Ethernet frame header, and the stream data identified as CID1 is transmitted through the wireless channel. The stream processing unit 210 is sent to the WiMAX subscriber station B 200.

The stream processing unit 210 of the WiMAX subscriber station B processes the Ethernet frame and transmits it to the Ethernet stream mapping module of the WiMAX subscriber station B 200.

Finally, the WiMAX stream CID1 is mapped back to the Ethernet frame and transmitted to the user B via the Ethernet stream mapping module of the WiMAX subscriber station B 200.

It can be seen from the above prior art technical solutions that when the prior art supports the wired transmission technology of the Ethernet, the MAC/VLAN/IP switching module needs to exchange the Ethernet frames, thereby enabling different subscriber stations in the WiMAX system. Inter-communication, or the realization of users' online business.

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

The structure of the WiMAX system of the prior art related to the present invention is as shown in FIG. 2, and the difference between the system and the system in the prior art is mainly as follows: The system sets the prior art in the WiMAX base station. The various high-capacity switching modules supporting the service switching are disposed in the central switching board 500 outside the WiMAX base station, and the central switching board 500 and the WiMA base station are interconnected through the backplane. The flow transfer relationship between the modules of the system is the same as that of the prior art, and will not be described in detail.

It can be seen from the prior art technical solutions that it has the following disadvantages:

1. Each additional support for a wired transmission technology requires a new switching module with poor scalability. 2. The more types of wired transmission technologies supported, the more types of switching modules are required, which complicates the wired transmission part of WiMAX base stations, and has many interconnection lines and high cost.

3. In order to support interworking between different WiMAX subscriber 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 large. Summary of the invention

The object of the present invention is to provide a switching system and method for WiMAX flow switching, which solves the problem of poor system scalability in the prior art by the present invention; and solves the problem that the type of wired transmission technology supported is more and more, and the required switching module is solved. The more types, the more complicated the wired transmission part of the WiMAX base station, the more interconnected wiring, and the higher the cost; the solution to the interworking of WiMAX different subscriber stations, user data packets or service frames, etc. in the prior art is solved. The problem of large transmission delay is caused by four flow mapping processes and one service switching process.

The object of the invention is achieved by the following technical solutions:

The invention provides a switching system for WiMAX flow switching, comprising:

a stream processing unit, configured to process and forward the WiMAX stream;

a stream switching unit, configured to receive, by using the set flow port, the forwarding by the stream processing unit

WiMAX stream; exchanging a source connection identifier of the WiMAX stream to a next hop connection identifier of the source connection identifier; transmitting the exchanged WiMAX stream to a stream processing unit corresponding to a next hop through a set flow port .

The stream processing unit includes:

a first stream processing unit and a second stream processing unit;

The first stream processing unit receives a WiMAX stream transmitted by the transmitting end, and transmits the WiMAX stream to the stream switching unit by using a stream port corresponding to the source connection identifier of the WiMAX stream; the second stream processing unit passes the The corresponding port of the exchange identifier of the exchanged WiMAX stream receives the WiMAX stream transmitted by the stream switching unit, processes the WiMAX stream, and transmits the processed WiMAX stream to the receiving end.

The flow port between the flow switching unit and the flow processing unit is defined according to a wireless resource supported by the system.

The wireless resource includes a WiMAX site, a sector, a frequency point, and/or a subchannel. Among them, the system also includes: a sender stream mapping unit and a sender stream processing unit;

The sending end stream mapping unit is configured to receive a service frame, a data packet, a cell, or a time slot sent by the user of the sending end, and map the service frame, the data packet, the cell, or the time slot into a corresponding WiMAX stream, And transmitting the WiMAX stream to the sender stream processing unit;

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

Among them, the system also includes:

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

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

The receiving end stream mapping unit is configured to receive the WiMAX stream transmitted by the receiving end stream processing unit, and map the WiMAX stream to a corresponding service frame, a data packet, a cell or a time slot, and transmit the message to the receiving end user. .

The sending end stream processing unit, the first stream processing unit, the second stream processing unit, and the MAC layer processing subunit connected to the sending end stream processing unit receive the WiMAX stream sent by the sending end stream mapping unit, and the sending end The physical layer processing subunit of the stream processing unit performs communication; the physical layer processing subunit of the transmitting end stream processing unit communicates with the physical layer processing subunit of the first stream processing unit through a wireless channel; the first stream processing unit The physical layer processing subunit communicates with the MAC layer processing subunit of the first stream processing unit; 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 physical processing subunit of the stream switching unit and the second stream processing unit; the physical processing subunit of the second stream processing unit communicates with the wireless channel The physical processing subunit of the receiving end stream processing unit performs communication; the physical processing subunit of the receiving end stream processing unit communicates with the MAC layer processing subunit of the receiving end stream processing unit; the MAC of the receiving end stream processing unit The layer processing subunit communicates with the receiving end stream mapping unit.

The 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 the set flow port, and send the WiMAX flow The service frame is mapped back to the sender user and then sent to the upper processing unit.

The flow port between the flow switching unit and the first flow mapping unit and/or the second flow mapping unit is defined by the external wired port of the flow mapping unit.

The flow 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 disposed in the interface board;

Or,

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

The present invention provides an exchange method for WiMAX flow switching, including:

Receiving, by the set flow port, a WiMAX stream from a stream processing unit corresponding to the sending end; exchanging a source connection identifier of the WiMAX stream to a next hop connection identifier of the source connection identifier;

The exchanged WiMAX stream is transmitted to the stream processing unit corresponding to the receiving end through the set stream port.

The exchanged WiMAX stream is transmitted to the stream mapping unit through the set stream port for transmission to the upper processing device.

As can be seen from the technical solution provided by the present invention, the present invention includes a stream processing unit and a stream switching unit. The stream switching unit receives the WiMAX stream forwarded by the stream processing unit through a set stream port, and the WiMA 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 transmitted to the stream processing unit through the set flow port, and the present invention can The switching technology is unified into a switching technology, which simplifies the wired transmission part of the WiMAX base station, reduces the number of interconnection lines, and reduces the cost.

In addition, the present invention only needs to define its mapping relationship and exchange relationship with the WiMAX stream, and can support interworking between different WiMAX nodes or the user's Internet access service, so the system has very Good scalability; With the invention, the interworking between different WiMAX nodes can be realized only by two flow mappings and one WiMAX flow exchange, thereby reducing the interworking transmission delay between different WiMAX nodes.

DRAWINGS

1 is a schematic structural diagram of a WiMAX system of the prior art;

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

3 is a schematic structural diagram of a system according to a first embodiment of the present invention;

4 is a schematic structural view of a system according to a second embodiment of the present invention.

detailed description

The present invention provides a switching system for WiMAX flow switching, the core of which includes: a stream processing unit for processing and forwarding a WiMAX stream; and a stream switching unit that receives the WiMAX stream forwarded by the stream processing unit through the set stream port, and The source connection identifier of the WiMAX stream is exchanged for the next hop connection identifier of the source connection identifier, and the switched WiMAX stream is transmitted to the stream processing unit corresponding to the next hop through the set flow port.

The first embodiment provided by the present invention is as shown in FIG. 3:

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

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

The node B420 includes a stream mapping unit 421 and a stream processing unit 422;

The node C430 includes a first stream processing unit 431, a stream switching unit 432, a second stream processing unit 433, a first stream mapping unit 434, and a second stream mapping unit 435, and is disposed in the same WiMAX interface board.

Wherein, each of the stream mapping units 411, 421, 434, 435 includes each stream mapping unit of the system-supported wired transmission technology, such as an Ethernet/IP stream mapping unit, an ATM stream mapping unit, a TDM stream mapping unit, and/or other stream mapping. unit. Each WiMAX stream processing unit includes an 802.16 physical layer processing subunit and an 802.16 MAC layer processing subunit.

The flow switching unit 432 in the node C includes a plurality of different flow ports, and the MAC layer processing subunit of the first stream processing unit 431 and the MAC layer processor of the second stream processing unit 433 in the node C, respectively. The unit and the first stream mapping unit 434 and the second stream mapping unit 435 are connected. WiMAX stream switching unit 432 and first stream mapping unit 434 and second stream mapping The flow port connected to the unit 435 can be defined by an external wired port supported by the node; the flow port connected between the WiMAX flow switching unit 432 and the first stream processing unit 431 and the second stream processing unit 433 of the node C It can be defined according to wireless resources such as WiMAX sites, sectors, frequency points, and subchannels supported by the system.

For example, suppose a WiMAX node C is a WiMAX base station, supports one site, each station has 4 sectors, each sector has two frequency points, does not support subchannels, supports two ATM ports, and two Ethernet interfaces. Two E1 ports can be used to define and plan the WiMAX flow port as shown in Table 1. The flow port number can be represented by 4 bits.

Table I

The 802.16 MAC layer processing subunit of the stream processing unit 412 in the node A410 receives the WiMAX stream sent by the stream mapping unit 411 in the node A 410, and communicates with the 802.16 physical layer processing subunit of the stream processing unit 412; The 802.16 physical layer processing subunit of the processing unit 412 communicates with the 802.16 physical layer processing subunit of the second stream processing unit 433 in the node C430 through a wireless channel; the 802.16 physical layer processor of the second stream processing unit 433 The unit communicates with the 802.16 MAC layer processing subunit of the second stream processing unit 433; the 802.16 MAC layer processing subunit of the second stream processing unit 433 communicates with the stream switching unit 432. The 802.16 MAC layer processing sub-unit of the first stream processing unit 431 communicates with the 802.16 physical layer processing sub-unit of the first stream processing unit 431 of the stream switching unit 432 and the node C430; 802.16 of the first stream processing unit 431 The physical layer processing subunit communicates with the 802.16 physical layer processing subunit of the stream processing unit 432 in the Node B 420 through a wireless channel; the 802.16 physical layer processing subunit of the stream processing unit 422 and the 802.16 MAC of the stream processing unit 422 The layer processing subunit communicates; the 802.16 MAC layer processing subunit of the stream processing unit 422 communicates with the stream 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 of the sender user A and the receiver user B, and establishes a flow mapping table. In addition, when the CID is assigned, the mapping relationship between the CID and the destination port is configured, and a flow exchange table is established.

The case when the present invention is applied will be described with reference to Fig. 3.

First, the present invention is used to implement the interworking between different nodes. Assume that the node B420 is regarded as the transmitting end, and the node A410 is regarded as the receiving end. The process of implementing the service interworking between different nodes by using the present invention is as follows:

^ Set user B to send a service frame, packet, cell or time slot to node B420:

The Node B 420 maps the service frame, the data packet, the cell, or the time slot to a WiMAX service flow by using the flow mapping unit 421, and the CID of the WiMAX service flow is the CID allocated to the sending end user B. , such as CID2, and transmitted to the corresponding stream processing unit 422.

The stream processing unit 422 sequentially processes the 802.16 MAC layer processing subunit and the 802.16 physical layer processing subunit, and then sends the processed WiMAX service stream (the CID of the WiMAX service stream to the CID allocated to the sending end user B) 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 stream through a wireless channel (the CID of the WiMAX service stream is the CID allocated to the sending end user B), and the processing is transmitted to the 802.16 MAC. The layer processing sub-unit performs processing, and the processed WiMAX service stream is transmitted to the stream switching unit 432 via the 802.16 MAC layer processing sub-unit.

The flow switching unit 432 receives the WiMAX service flow (the CID of the WIMAX service flow is the CID allocated to the sending end user B) through the defined flow port (Port2) between the first stream processing unit 431, and first, according to the The streaming port comes in the WiMAX service flow The CID in the MAC frame header searches the flow switching table to obtain the destination port and the next hop CID corresponding to the CID; and then determines whether to modify the CID in the MAC frame header according to whether the next hop CID is valid, if the next hop CID For example, if CID1 is within the range of CID values assigned to the receiving end, the CID value is valid, so the CID in the MAC frame header of the WiMAX service flow is exchanged as the CID allocated to the receiving end user, for example, CID2 is exchanged as CID1. Then, the exchanged WiMAX service flow (the CID of the WiMAX service flow is CID1) is transmitted from the corresponding flow port (Port1 in the figure) to the second stream processing unit 433 in the node C.

The second stream processing unit 433 receives the WiMAX service stream (the CID of the WiMAX service stream is CID1), and is processed by the 802.16 MAC layer processing sub-unit and the 802.16 physical layer processing sub-unit, and then sent to the node A410 via the wireless channel.

The stream processing unit 412 of the node A410 receives the WiMAX service flow via the wireless channel (the CID of the WiMAX service flow is CID1), and is processed by the 802.16 physical layer processing subunit and the 802.16 MAC layer processing subunit, and then sent to the corresponding Flow mapping unit 411.

The flow mapping unit 411 checks the flow mapping table to map the WiMAX service flow (the CID of the WiMAX service flow to CID1) to a corresponding service frame, data packet, cell or time slot, and transmits it to the user A.

The foregoing describes the use of the present invention to implement service interworking between different nodes. The use of the present invention to implement the Internet access of the user will be described below with reference to FIG.

It is assumed that the transmitting end user B sends a service frame, a data packet, a cell or a time slot to the Node B 420: the Node B 420 maps the service frame, the data packet, the cell or the time slot through the flow mapping unit 421 of the flow mapping unit 421 For the WiMAX service flow, the CID of the WiMAX service flow is a CID assigned to the transmitting end user B, such as CID2, and is transmitted to the corresponding stream processing unit 422.

The stream processing unit 422 sequentially processes the 802.16 MAC layer processing subunit and the 802.16 physical layer processing subunit, and then sends the processed WiMAX service stream (the CID of the WiMA service stream to the CID allocated to the sending end user B) 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 stream through a wireless channel (the CID of the WiMAX service stream is the CID allocated to the sending end user B), and the processing is transmitted to the 802.16 MAC. The layer processing subunit processes, and transmits the processed WiMAX service stream to the stream switching unit via the 802.16 MAC layer processing subunit 432.

The flow switching unit 432 receives the WiMAX service flow through a defined flow port (such as the Port 2 flow port in FIG. 3) with the first flow processing unit 431 (the CID of the WiMAX service flow is the CID allocated to the transmitting end user B) After that, first, according to the CID search flow exchange table in the MAC frame header of the WiMAX service flow coming in from the flow port, the flow destination port and the next hop CID corresponding to the CID are obtained; and then according to whether the next hop CID is Effectively determining whether to modify the CID in the MAC frame header. If the next hop CID is not within the allocated CID value range, it indicates that the next hop CID is invalid, and then the WiMAX service flow (the CID of the WiMAX service flow is sent for sending) The CID assigned by the end user A is transmitted from the corresponding stream port (such as the PortlO stream port in FIG. 3) to the upper processing device.

Corresponding to the first embodiment of the present invention, the functions of the first stream processing unit 431 and the second stream processing unit 433 can be completed using only any one of the first stream processing unit 431 or the second stream processing unit 433 in the first embodiment. The functions of the first stream mapping unit 434 and the second stream mapping unit 435 may also be completed using only any one of the first stream mapping unit 434 or the second stream mapping unit 435 in the first embodiment.

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

The first flow processing unit, the second stream processing unit, the stream switching unit, the first-class mapping unit, and the second stream mapping unit are no longer arranged in the same interface board of the node C. In the second embodiment, the flow switching unit is disposed in the central switching board 510 of the node C, and the first stream processing unit and the second stream processing unit, the first stream mapping unit, and the second stream mapping unit are respectively disposed at the node In different interface boards in c, if the first stream mapping unit and the second stream mapping unit are disposed in the wired interface board, the first stream processing unit and the second stream processing unit are disposed in the WiMAX wireless interface board.

The WiMAX Stream Switching Unit of the Central Switch Board supports service switching between wired or WiMAX wireless interface boards, wired and WiMAX wireless interface boards.

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

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

The fourth embodiment provided by the present invention is different from the second embodiment in that the first stream mapping unit and the second stream mapping unit are not included, and the interface board of the stream mapping unit is configured. For the stream switching unit, only the flow switching unit is configured. It is a flow port between the first stream processing unit and the second stream processing unit.

When the third embodiment and the fourth embodiment are applied, the user can only implement service interworking between different user stations. The specific implementation process is the same as that in the first embodiment, and will not be described in detail.

It can be seen from the technical solution provided by the present invention that the system of the present invention includes a stream processing unit and a stream switching unit; the stream switching unit receives the WiMAX stream forwarded by the stream processing unit through a set stream port, and And switching the source connection identifier of the WiMAX stream to the next hop connection identifier of the source connection identifier, and transmitting the exchanged WiMAX stream to the stream processing unit corresponding to the next hop through the set flow port; The invention realizes that only the mapping table and the exchange table of the WiMAX stream can be defined, and the WiMAX stream switching technology can be used to exchange and support the interworking between different WiMAX nodes; and the switching technologies can be unified into one switching technology, thereby The transmission part of the WiMAX node, such as the wired transmission part of the WiMAX base station, is obtained, the interconnection line is small, and the cost is reduced; and the interworking between different WiMAX nodes can be realized only after two flow mappings. Thereby reducing the interworking transmission delay between different WiMAX nodes.

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 enables large-capacity WiMAX stream switching.

The above is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of changes or within the technical scope disclosed by the present invention. Alternatively, for example, the stream switching unit, the stream mapping unit, or the stream processing unit is not limited to being disposed in the same interface board of the node, or is not limited to the setting of the stream switching unit, the stream mapping unit, or the stream processing unit. The arrangement of the different interface boards, or not limited to the arrangement of the flow switching unit in the central switching board, should be covered by the scope of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

Rights request

A switching system for WiMAX flow switching, comprising: a stream processing unit, configured to process and forward a WiMAX stream;

a flow switching unit, configured to receive, by using the set flow port, a WiMA flow forwarded by the flow processing unit, and exchange a source connection identifier of the WiMAX flow to a next hop connection identifier of the source connection identifier, by setting The stream port transmits the exchanged WiMAX stream to a stream processing unit corresponding to the next hop.

2. The switching system of claim 1, wherein the stream processing unit comprises:

a first stream processing unit and a second stream processing unit;

The switching system according to claim 2, wherein the flow port between the flow switching unit and the stream processing unit is defined according to a wireless resource supported by the system.

4. The switching system of claim 3, wherein the wireless resource comprises a WiMAX site, a sector, a frequency point, and/or a subchannel.

The switching system according to claim 4, further comprising:

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

The sending end flow mapping unit is configured to receive a service frame, a data packet, a cell, or a time slot sent by the user of the sending end, and map the service frame, the data packet, the cell, or the time slot into a corresponding WiMAX stream. And then transmitting the WiMAX stream to the sender stream processing unit;

The switching system according to claim 5, further comprising:

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

The receiving end stream processing unit is configured to receive the WiMAX transmitted by the second stream processing unit a stream, after being processed by the WiMA stream, sent to the receiving end stream mapping unit, where the receiving end stream mapping unit is configured to receive the stream transmitted by the receiving end stream processing unit

The WiMAX stream is mapped to the corresponding service frame, data packet, cell or time slot and transmitted to the receiving end user.

7. The switching system of claim 6 wherein:

The sending end stream processing unit, the first stream processing unit, the second stream processing unit, and the receiving end stream processing the MAC layer processing subunit of the sending end stream processing unit receive the WiMAX stream sent by the sending end stream mapping unit, and the transmitting end The physical layer processing subunit of the stream processing unit performs communication; the physical layer processing subunit of the transmitting end stream processing unit communicates with the physical layer processing subunit of the first stream processing unit through a wireless channel; the first stream processing unit The physical layer processing subunit communicates with the MAC layer processing subunit of the first stream processing unit; the MAC layer processing subunit of the first stream processing unit communicates with the stream switching unit;

The switching system according to any one of claims 1 to 7, further comprising: a first stream mapping unit and/or a second stream mapping unit, configured to receive the stream switching unit through the set stream port The transmitted WiMAX stream is mapped to the traffic frame of the sender user and then sent to the upper processing unit.

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

The flow port between the flow switching unit and the first flow mapping unit and/or the second flow mapping unit is defined according to a wired port external to the flow mapping unit.

10. The switching system of claim 9 wherein:

The flow 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 disposed in the interface board; or,

11. A method for switching a WiMAX stream exchange, comprising: receiving a WiMAX stream from a stream processing unit corresponding to a sender through a set stream port; exchanging source connection identifiers of the WiMAX stream to The next hop connection identifier of the source connection identifier;

12. A method for switching a WiMAX stream exchange, comprising: receiving a WiMAX stream from a stream processing unit corresponding to a sender through a set stream port; exchanging source connection identifiers of the WiMAX stream to The next hop connection identifier of the source connection identifier;