WO2006116927A1

WO2006116927A1 - A METHOD FOR IMPLEMENTING WiMAX STREAM SWITCH

Info

Publication number: WO2006116927A1
Application number: PCT/CN2006/000834
Authority: WO
Inventors: Ruobin Zheng
Original assignee: Huawei Technologies Co., Ltd.
Priority date: 2005-04-29
Filing date: 2006-04-28
Publication date: 2006-11-09
Also published as: CN100479428C; CN1855883A

Abstract

A method for implementing WiMAX stream switch includes: a stream switch unit is set between the MAC layer and the wire transmission stream mapping unit of the WiMAX base station or the WiMAX user station, and then WiMAX stream switch is implemented based on the stream switch unit. The present invention combines plurality of technologies to one switch technology and makes the transmission the WiMAX node become simple, thereby reduces the cost. When a wire transmission type is added, the only need is to define the relation of mapping and switching between the WiMAX stream and the wire transmission type added, therefore it has nice expandability. When the service intercommunication among the different WiMAX nodes needs to be implemented, the present invention could reduce the mapping numbers of the user packet or the service frame etc, in order to reduce the delay of the service transmission among the different WiMAX nodes.

Description

Method for realizing WiMAX stream exchange

The present invention relates to the field of communications, and in particular, to a method for implementing WiMAX flow switching. Background technique

WiMAX technology is an 802.16 standard developed by the IEEE. WiMAX technology has the advantage of other wireless technologies that provide access to the network to offices, homes, and mobile users. In addition to the integration of mobility, portability and fixed Internet access, WiMAX technology has the advantage of low operating costs and therefore has a promising application prospect.

The 802.16 standard defines the physical layer and medium access control layer (MAC, Medium Acces s Control) layer. The MAC layer is used to define and allocate logical channels of the air interface such that these channels can be shared by different mobile stations, including a service specific convergence sublayer, a MAC common partial sublayer, and an encryption sublayer. The standard defines a corresponding service-specific convergence sub-layer based on ATM and message-based (eg Ethernet and IP packets), does not define a service-specific convergence sub-layer for TDM services or other access technologies, and serves a specific convergence sub-layer One of the main functions is the flow map. The various stream mapping units described below correspond to the service specific convergence sublayer of the 802.16 standard, and the 802.16 MAC processing layer described below corresponds to the MAC common part sublayer and the encryption sublayer of the 802.16 standard.

The prior art provides a method for implementing WiMAX flow exchange, including:

Step 1: The transmitting end user station maps the Ethernet frame of user A into a connection identifier (CID, Connect ion Ident if ier) as the CID2 WiMA according to the source MAC address and the VLAN identifier of the frame of the Ethernet service frame of the user A. After being processed by the 802.16 MAC processing layer and the 802.16 physical layer, the WiMAX that identifies the connection as CID2 is sent to the WiMAX base transceiver station of the transmitting end via the wireless channel.

Step 2: After receiving the WiMAX stream with the connection identifier CID2, the WiMAX base station transceiver processes the physical layer and the MAC processing layer, and then maps it back to the Ethernet service frame, and selects the Ethernet through the routing. A switching module, such as a MAC switching/VLAN switching/IP switching module, is exchanged to the WiMAX base transceiver station at the receiving end.

Step 3: The WiMAX base station transceiver maps the Ethernet service frame to a connection identifier according to the destination MAC address and the VLAN identifier of the frame header of the Ethernet service frame. The WiMAX stream of CID1 is processed by the MAC processing layer and the physical layer, and then transmitted to the WiMAX subscriber station of the receiving end through the wireless channel.

Step 4: The WIMAX subscriber station at the receiving end performs 802.16 physical layer processing and 802.16 MAC layer processing on the WiMAX stream with the connection identifier CID1, and maps the processed connection to the WiMAX stream of the CID1 as the corresponding Ethernet. The network service frame is transmitted to the receiving end user.

The existing technology needs to select a switching module supported by the WiMAX technology to exchange the Ethernet service frame of the transmitting end with the Ethernet service frame of the receiving end. Therefore, when there are many types of wired transmissions required, more switching modules need to be supported, which may result in The wired transmission of the system becomes complicated, which in turn leads to increased operating costs.

When adding new wired transmission technologies, new switching modules supporting such wired transmission technologies are needed. When space is limited, expansion will encounter difficulties.

When it is required to implement service interworking between two different user stations of WiMAX, the service frame of the transmitting end user must undergo four flow mapping processes and a wired/wireless switching process, and the transmission delay is large. Summary of the invention

In view of the above, it is an object of the present invention to provide a method of implementing WiMAX flow exchange to address at least some or all of the problems and deficiencies of the prior art described above.

A method for implementing WiMAX flow exchange provided by the present invention includes:

A. setting a flow switching unit between the MAC processing layer and the flow mapping unit of the WiMAX base station or the WiMAX subscriber station;

B. Implementing exchange of WiMAX flows based on the flow switching unit.

The step A specifically includes:

Setting a flow switching unit between the MAC processing layer and the flow mapping unit of the WiMAX base station or the WiMAX subscriber station;

Defining, according to the radio resource supported by the base station or the subscriber station, a stream port connected to the MAC processing layer of the WiMAX base station or the subscriber station;

The flow port between the stream switching unit and the wired transport stream mapping unit is defined according to the wired port supported by the base station or the subscriber station.

The radio resources include: WIMAX stations, sectors, frequency points, and/or subchannels.

Between the steps A and B includes: C. Establish a header identifier of the sender packet service data or a correspondence between the TDM time slot and the corresponding uplink WiMAX stream CID, and a header identifier of the packet service packet of the receiving end or a correspondence between the TDM time slot and the corresponding downlink WiMAX stream CID;

D. Configure a correspondence between the CID and the flow port and a next hop CID; or, configure a flow port domain and a fast switch domain corresponding to the CID, and configure a next hop CID corresponding to the CID.

The step C includes:

Establishing a correspondence between the virtual path/virtual channel identifier of the ATM cell at the transmitting end and the corresponding uplink WiMAX stream CID, and the corresponding relationship between the virtual path/virtual channel identifier of the ATM cell at the receiving end and the corresponding downlink WiMAX stream CID;

Establishing a source MAC address of the sender Ethernet frame and/or a correspondence between the virtual local area network identifier and the corresponding uplink WiMAX flow CID, and a destination MAC address of the receiving end Ethernet frame and/or a correspondence between the virtual local area network identifier and the corresponding downlink WiMAX flow CID Relationship

Establish a correspondence between the TDM time slot of the transmitting end and the corresponding uplink WiMAX flow CID, and the corresponding relationship between the T leg time slot of the receiving end and the corresponding downstream WiMAX flow CID.

The step B includes:

B1, the flow switching unit acquires a corresponding flow port and a next hop connection identifier according to the connection identifier in the MAC frame header of the uplink WiMAX flow that is sent;

B2, determining whether the next hop connection identifier is valid, if valid, performing step B3; otherwise, performing step B4;

B3, the switching of the connection identifier in the frame header of the MAC frame is a next hop connection identifier, and the exchanged WiMAX stream is transmitted to the MAC processing layer of the corresponding processing unit through the obtained stream port;

B4. The WiMAX stream is transmitted to the corresponding stream mapping unit by the acquired stream port. The step B specifically includes:

Bl, the flow switching unit acquires a corresponding flow port domain and a fast switching domain from a CID of a MAC frame header of the transmitted WiMAX flow;

B2, according to the bit value in the fast exchange domain to determine whether it is a fast exchange or a normal exchange, if it is a fast exchange, step b3; if it is a normal exchange, step b4; B3, the connection identifier in the MAC header of the WiMAX flow is exchanged to a corresponding next hop connection identifier, and the exchanged WiMAX flow is transmitted to the MAC processing layer of the corresponding processing unit through the acquired flow port;

B4. The WiMAX stream is transmitted to the corresponding stream mapping unit by using the acquired port of the flow. The step B further includes:

The flow mapping unit maps the WiMAX flow back to the original packet service data packet or time slot according to the header identifier of the packet service data packet or the corresponding relationship between the wake-up time slot and the corresponding uplink WiMAX flow connection identifier;

Transmitting the original service frame, data packet, cell or time slot to the upper processing device;

The superior processing device determines whether the user of the sending end is authorized according to the header identifier of the sending end packet service data packet or the τ leg time slot, and if authorized, allows access; otherwise, denying access; or

The MAC processing layer receives the WiMAX stream, processes the WiMAX stream, hands it to the corresponding physical layer for processing, and transmits the data to the physical layer of the next-stage processing unit via the wireless channel.

The physical layer of the processing unit of the next stage processes the WiMAX stream and transmits it to the corresponding MAC processing layer for processing, and then transmits the data to the corresponding stream mapping unit via the MAC processing layer;

The corresponding flow mapping unit maps the WiMAX flow to a corresponding service frame, a data packet, a cell, or a packet according to a header identifier of the packet data packet of the receiving end or a correspondence between the TOM time slot and the corresponding downlink WiMAX flow connection identifier. a time slot, and transmitting the service frame, data packet, cell or time slot to the receiving end.

The mapping, by the flow mapping unit, mapping the WiMAX flow back to the original packet service data packet or time slot according to the corresponding relationship includes:

The stream mapping unit maps the WiMAX stream back to the original ATM cell according to the correspondence between the virtual path/virtual channel identifier of the ATM cell at the transmitting end and the corresponding uplink WiMAX stream CID; or

The stream mapping unit is configured to map the source MAC address of the sender Ethernet frame and/or the virtual local area network identifier to the corresponding uplink WiMAX stream CID, and map the WiMAX stream back to the original service frame; or

The flow mapping unit according to the correspondence between the TDM time slot of the transmitting end and the corresponding uplink WiMAX flow CID Relationship, mapping the WiMAX stream back to the original TDM packet.

The method includes:

The corresponding flow mapping unit maps the WiMAX flow to a corresponding ATM cell according to the corresponding relationship between the virtual path/virtual channel identifier of the ATM cell of the receiving end and the corresponding downlink WiMAX flow CID, and the ATM cell is Transmitted to the receiving end; or,

The corresponding flow mapping unit maps the WiMAX flow to a corresponding Ethernet frame according to a destination MAC address of the Ethernet frame of the receiving end and/or a correspondence between the virtual local area network identifier and the corresponding downlink WiMAX flow CID, and the The Ethernet frame is transmitted to the receiving end; or,

The corresponding stream mapping unit maps the WiMAX stream to a corresponding TDM data packet according to the correspondence between the receiving end T Li time slot and the corresponding downlink WiMAX stream CID, and transmits the Tili data packet to the receiving end.

The step B further includes:

The transmitting end sends the packet service data packet or the time slot to the corresponding flow mapping unit; B II. The flow mapping unit is configured according to the header identifier of the sending end packet service data packet or the T匪 time slot and the corresponding uplink WiMAX flow CID. Corresponding relationship, mapping the packet service data packet or time slot into a corresponding WiMAX flow, and transmitting the WiMAX flow to a MAC processing layer of a corresponding processing unit;

After processing, the processing layer of the processing unit transmits the WiMAX stream to the corresponding physical layer for processing, and then transmits the data to the physical layer of the next-stage processing unit via the wireless channel; BIV. After the physical layer of the unit processes the WiMAX stream, it is transmitted to the corresponding MAC processing layer for processing, and is transmitted to the stream switching unit via the MAC processing layer.

The step B II specifically includes:

The stream mapping unit maps the ATM cell to a corresponding WiMAX stream according to the corresponding relationship between the virtual path/virtual channel identifier of the ATM cell and the corresponding uplink WiMAX stream CID, and transmits the WiMAX stream. To the MAC processing layer of the corresponding processing unit; or,

The flow mapping unit maps the Ethernet frame to a corresponding WiMAX stream according to a destination MAC address of the Ethernet frame of the receiving end and/or a correspondence between the virtual local area network identifier and the corresponding downlink WiMAX stream CID, and transmits the WiMAX stream Sending to the MAC processing layer of the corresponding processing unit; or, the flow mapping unit is based on the pair of the TDM time slot of the receiving end and the corresponding downstream WiMAX flow CID In response, the T-data packet is mapped to a corresponding WiMAX stream, and the WiMAX stream is transmitted to a MAC processing layer of a corresponding processing unit.

The packet service data packet includes a service frame, a data packet, and a cell. It can be seen from the technical solution provided by the present invention that the present invention sets a flow switching unit between a MAC processing layer of a WiMAX base station or a WiMAX subscriber station and a wired transport stream mapping unit, and then implements WiMAX flow exchange based on the flow switching unit. In the method, a plurality of switching technologies are unified into one switching technology, so that the transmission part of the WiMAX node is unified, thereby reducing the cost; when the wire transmission type is increased by the invention, only the mapping relationship with the WiMAX flow is defined. The exchange relationship has good scalability; when the service interworking between different WiMAX nodes is implemented, the present invention can reduce the number of flow mappings of user data packets (or frames, etc.), thereby reducing service transmission between different WiMAX nodes. Delay. DRAWINGS

Figure 1 is a flow chart of a first embodiment of the present invention;

Figure 2 is a schematic diagram for explaining an embodiment of the present invention;

Figure 3 is a flow chart of a second embodiment of the present invention.

detailed description

The present invention provides a method for implementing WiMAX flow switching, the core of which is: setting a flow switching unit between a MAC processing layer of a WiMAX base station or a WiMAX subscriber station and a wired transport stream mapping unit; implementing a WiMAX stream based on the flow switching unit Exchange. Embodiment 1 Referring to FIG. 1, the method provided by the present invention includes:

Step S101, a flow switching unit is set between the MAC processing layer of the WiMAX base station or the WiMAX subscriber station and the wired transport stream mapping unit.

For example, as shown in FIG. 2, a stream switching unit 130 is provided between the MAC processing layer 120 in the node C100 and the wired transport stream mapping unit 110. The node C may be a WiMAX base station or a WiMAX subscriber station.

When the flow switching unit is set, the radio resource definition stream switching unit is connected to the MAC processing layer of the WiMAX base station or the subscriber station according to the radio resource defined flow exchange unit such as the WIMAX station, sector, frequency point and/or subchannel supported by the base station or the subscriber station. Stream port; wired port supported by base station or subscriber station Define a flow port between the stream switching unit and the wired transport stream mapping unit. The number of bits in the WiMAX stream port number can be determined based on the maximum number of stream ports supported by a WiMAX system.

For example, suppose a WiMAX node 3 (such as 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 networks. Interface, two E1 ports, can be defined and planned as shown in Table 1. The flow port number can be represented by 4 bits.

Step S102, assigning a corresponding WiMAX stream connection identifier (CID) to the sender user and the receiver user, that is, establishing a header identifier or a TDM time slot of the sender service frame, the data packet or the cell, and the allocated Corresponding relationship between the CID of the uplink WiMAX stream, and the header identifier of the service frame, the data packet or the cell, or the correspondence between the Tili slot and the allocated downlink WiMAX stream CID, and saving the correspondence to the flow mapping relationship In the table.

In this step, the uplink WiMAX stream and the downlink WiMAX stream are based on a stream switching unit. Point-differentiated, still referring to FIG. 2, the uplink WiMAX stream refers to the WiMAX stream transmitted to the stream switching unit, and the downlink WiMAX stream refers to the WiMAX stream transmitted from the stream switching unit.

Step S103: Configure a next hop CID, and a corresponding port of the flow, and establish a flow exchange table.

The implementation process of step S102 and step S103 will be described in detail below by taking the wired transmission technology supporting ATM, Ethernet and TDM of the present invention as an example.

When the present invention supports the wired transmission technology of ATM, in the process of building a service flow, the VPI/VCI (Virtual Path Ident if ier/Virtual Channel Ident) of the ATM cell is sent in the uplink direction according to the flow switching unit. If ier virtual path/virtual channel identification, assign WiMAX stream CID to user A, downlink direction according to user B receives ATM cell VPI/VCI, assign corresponding WiMAX stream CID to user B, and save the distribution result to ATM stream Map the relationship table. That is to say, the correspondence between the VPI/VCI of the ATM cell of the transmitting end and the CID of the corresponding uplink WiMAX stream, and the correspondence between the VPI/VCI of the ATM cell of the receiving end and the CID of the corresponding downlink WiMAX stream are established, and are saved to the ATM stream mapping relationship. In the table.

Assume that the transmitting end user A and the receiving end user B are in VC exchange, for example, assigning CID2 and CID8 to ATM user A, and assigning CID1 and CID9 to ATM user B. The established ATM flow mapping relationship table is shown in Table 2:

Table II

At the same time, the next hop CID of the CID and its corresponding destination port are configured to establish an ATM flow exchange table, as shown in Table 3 (where the symbol "-" indicates that the next hop CID is invalid).

Table 3

CID Next hop CID stream destination port number CID1 ― ———■

CID2 CID1 1

CID8 8

CID9 1 When the present invention supports the wired transmission technology of Ethernet, in the process of building a service flow, the flow switching unit is used as a base point, and the uplink direction is allocated according to the source MAC address and/or the VLAN identifier of the Ethernet frame of the transmitting end. The WiMAX stream CID is sent to the sending end user, and the corresponding WiMAX stream CID is assigned to the receiving end user according to the destination MAC address and/or the VLAN identifier of the receiving end Ethernet frame, and the allocation result is saved in the Ethernet stream mapping relationship table. That is to say, the correspondence between the source MAC address and/or the VLAN identifier of the sender Ethernet frame and the corresponding uplink WiMAX stream CID, and the destination MAC address and/or VLAN identifier of the Ethernet frame of the receiver and the corresponding downlink WiMAX stream CID are established. Correspondence relationship, and saved to the Ethernet flow mapping relationship table.

Assume that the MAC addresses of the sender user A and the receiver user B use MAC-A and MAC-B respectively, assign CID2 and CID10 to Ethernet user A, assign CID1 and CID11 to Ethernet user B, and the user accesses the service stream (such as the user). A and B are connected to each other through the node C. The service flow between the user and the user (for example, the interworking between the user A and the B at the node C) should be identified by different VLANs. The mapping table of the established Ethernet flow mapping is shown in Table 4:

Table 4

At the same time, the next hop CID of the CID and its corresponding destination port number are configured to establish an Ethernet flow exchange table, as shown in Table 5:

Table 5 CID Next hop CID stream destination port number

CID1 one

CID2 CID1 1

CID 10 ― 10

CID 11 ― 1 When the present invention supports the TDM wired transmission technology, in the process of establishing a service flow, the flow switching unit is used as the base point, and the WiMAX flow CID is allocated to the TOM time slot occupied by the uplink service and the downlink service respectively. The end user and the receiving end user, the TDM time slot and the CID may be mapped one-to-one, or may be multi-to-one mapping (multiple TDM time slots are bundled into one WiMAX stream). Assume that a TDM stream mapping table as shown in Table 6 is formed.

In addition, the method of configuring the CID's next hop CID and its corresponding destination port number is the same as that of the ATM or Ethernet wired transmission technology, and will not be described in detail.

Step S104: The sender user sends the service frame, the data packet, the cell or the time slot to the corresponding stream mapping unit.

Step S105, the flow mapping unit, according to the correspondence between the service frame of the sending end, the header of the data packet or the cell, or the correspondence between the Terry time slot and the uplink WiMAX flow CID allocated to the user, the service frame, the data packet, The cell or time slot is mapped to a WiMAX stream identified as CID and the WiMAX stream is transmitted to the MAC processing layer of the upstream processing unit.

Step S1 G6, the MAC processing layer of the uplink processing unit processes the WiMAX stream, and then transmits the data to the corresponding physical layer for processing, and transmits the data to the physical layer of the next-stage processing unit via the wireless channel. Step SI 07: The physical layer of the processing unit of the next stage processes the WiMAX stream, and then transmits the processing to the corresponding MAC processing layer, and transmits the data to the stream switching unit via the MAC processing layer.

Step S108: The flow switching unit searches the flow mapping relationship table according to the CID in the MAC frame header of the transmitted WiMAX flow, and obtains the corresponding flow destination port and the next hop CID.

Step S109, determining whether the next hop CID value is within the CID value range of the receiving end user. If yes, indicating that the next hop CID is valid, step S110 is performed; otherwise, step S11 L is performed.

Step S110: The CID in the frame header of the MAC frame is switched to the next hop CID, and the exchanged WiMAX stream is transmitted to the MAC layer of the corresponding processing unit through the obtained stream port, and then step S112 is performed.

Step S 111: The WiMAX stream is transmitted to the corresponding stream mapping unit by using the acquired port of the flow, and then step S115 is performed.

Step S112: The MAC processing layer of the corresponding processing unit receives the WiMAX stream, and processes the WiMAX stream, and then transmits the corresponding layer to the physical layer of the next-stage processing unit.

Step S113: The physical layer of the processing unit of the next stage processes the WiMAX stream and transmits the result to the corresponding MAC processing layer for processing, and then transmits the signal to the corresponding stream mapping unit via the MAC processing layer.

Step S114: The flow mapping unit maps the WiMAX flow to a corresponding service frame according to a correspondence between a service frame of the user at the receiving end, a header identifier of the data packet or the cell, or a corresponding relationship between the TDM time slot and the allocated downlink WiMAX flow CID. , a packet, a cell or a time slot, and transmitted to the receiving end user.

Step S115, the flow mapping unit maps the WiMAX flow back to the original service frame according to the correspondence between the service frame of the sending end, the header of the data packet or the cell, or the corresponding relationship between the TDM time slot and the uplink WiMAX flow CID allocated to the user. , a data packet, a cell or a time slot, and transmitted to the higher-level processing device.

Step S116: The upper processing device determines whether the user is authorized according to the identification information of the sender user carried in the original service frame, the data packet, the cell, or the time slot. If authorized, the user is allowed to access the Internet; otherwise, the user is denied access to the Internet. The implementation process of step S104 to step S116 will be described in detail below by taking the wired transmission technology of ATM and Ethernet supported by the present invention as an example. When the present invention supports ATM wired transmission technology, if an ATM user accesses the Internet, the processing procedure is as follows:

User A sends an ATM cell with a VPI/VCI of VPI8/VCI8 to the ATM stream mapping unit 1 of the transmitting end (such as node A in FIG. 2), and the ATM stream mapping unit 1 searches for the user A according to the VPI/VCI table 2. The ATM cell is mapped to the WiMAX stream identified as CID8, and then the 802.16 MAC frame is sent to the uplink processing unit via the wireless channel (the uplink processing unit is based on the flow switching unit, and is defined according to the direction of the WiMAX flow, and is transmitted to The WiMAX stream of the stream switching unit is an uplink WiMAX stream, and the processing unit through which the uplink WiMAX stream passes is an uplink processing unit, such as the processing unit indicated by the sequence number 210 in Fig. 2. The following related description is the same as explained herein. The MAC processing layer of the uplink processing unit processes the WIMAX stream, and then transmits the processing to the corresponding physical layer for processing, and transmits the data to the next processing unit via the physical layer (such as the serial number 140 in FIG. 2). a physical layer of the processing unit); the physical layer of the processing unit of the next stage processes the uplink WiMAX stream, and then transmits the processing to the corresponding MAC processing layer, and performs the The MAC processing layer is sent to the flow switching unit. The flow switching unit searches the table 3 according to the 802.16 MAC frame CID to obtain the destination port 8 and the next hop CID, and confirms that the next hop CID is invalid, and does not modify the 802.16. The CID field of the MAC frame header is directly forwarded by the destination port 8. Finally, the ATM stream mapping unit looks up Table 2, and the ATM cells that are mapped to the CMAX8 WiMAX stream mapped to VPI8/VCI8 are transmitted to the upper processing unit via the ATM port. When the present invention supports the wired transmission technology of ATM, if the interworking of services between different nodes is implemented, the processing procedure is as follows:

The transmitting end user A sends an ATM cell with a VPI/VCI of VPI2/VCI2 to the corresponding ATM stream mapping unit, and the ATM stream mapping unit maps the ATM cell of the user A to the connection identifier according to the VPI/VCI lookup table 2. The WiMAX stream of the CID2, and then the 802.16 MAC frame is sent to the MAC processing layer of the uplink processing unit; the MAC processing layer of the uplink processing unit processes the WiMAX stream, and then transmits the data to the corresponding physical layer for processing, and The wireless channel is transmitted to the physical layer of the processing unit of the next stage; the physical layer of the processing unit of the next level processes the uplink WiMAX stream, and then transmits the processing to the corresponding MAC processing layer, and transmits the data through the MAC processing layer. The flow switching unit is configured to perform the next hop CID and the destination port 1 according to the 8G2.16 MAC frame CID, and modify the 802 when the next hop CID is determined to be the valid value CID1. The CID field of the MAC frame header is CID1, and is forwarded to the downlink processing unit by the port Port1 of the flow destination. The downlink processing unit is based on the flow switching unit, and the WiMAX sent by the flow switching unit is defined according to the direction of the WiMAX flow. The stream is a downlink WiMAX stream, and the processing unit through which the downlink WiMAX stream passes is a downlink processing unit, such as the MAC processing layer of the processing unit indicated by the sequence number 150 in FIG.

Afterwards, the MAC processing layer of the downlink processing unit receives the WiMAX stream, and processes the WiMAX stream, and then transmits the WiMAX stream to a lower-level processing unit of the receiving end (for example, the node B in FIG. 2) through the corresponding physical layer. a physical layer (for example, the processing unit 310 in the node B in FIG. 2); the processing unit performs processing and then transmits to the corresponding stream mapping unit; the ATM stream mapping unit identifies the connection as the VPI/VCI table 2 The WiMAX stream of CID1 is mapped to the ATM cell with VPI/VCI of VPI1/VCI1, and is transmitted to the receiving end user. When the Ethernet transmission network technology of the present invention is supported, if the Ethernet user accesses the Internet, the processing procedure is as follows:

The sending end user A sends the source MAC address and the Ethernet frame whose VLAN ID is MAC-A/VLAN 10 to the corresponding Ethernet stream mapping unit; the Ethernet stream mapping unit checks the table 4 according to the source MAC address and the VLAN identifier, The Ethernet frame of the user A is mapped to the WiMAX stream with the connection identifier CID10, and then the 802.16 MAC frame is sent to the MAC processing layer of the uplink processing unit; after the MAC processing layer of the uplink processing unit processes the WiMAX stream, And transmitting to the corresponding physical layer for processing, and transmitting to the physical layer of the next-stage processing unit via the wireless channel; the physical layer of the next-stage processing unit processing the uplink WiMAX stream, and transmitting to the corresponding MAC processing layer Processing, and transmitting to the flow switching unit via the MAC processing layer; the flow switching unit searches the table 5 according to the CID of the 802, 16 MAC frame to obtain the destination port Port 10 and the next hop CID, and confirms the next hop. The CID is invalid. The CID field of the 802.16 MAC header is not changed. It is directly forwarded by the destination port 10. Finally, the Ethernet stream mapping unit searches the table 4 according to the source MAC address and the VLAN identifier, and maps the WiMAX stream whose connection is identified as CID10 to the MAC address and the Ethernet frame whose VLAN identifier is MAC-A/VLAN10, and transmits it to the Ethernet frame through the Ethernet port. Upper processing unit. When the present invention supports the wired transmission technology of Ethernet, if the interworking of services between different nodes is implemented, the processing procedure is as follows:

The sending end user A sends the source MAC address and the Ethernet frame whose VLAN ID is MAC-A/VLAN1 to the corresponding Ethernet stream mapping unit; the Ethernet stream mapping unit> according to the source MAC address and the VLAN identifier, check the table IV. The Ethernet frame of the user A is mapped to the WiMAX stream with the connection identifier CID2, and then the 802.16 MAC frame is sent to the MAC processing layer of the uplink processing unit; after the MAC processing layer of the uplink processing unit processes the WiMAX stream, And transmitting to the corresponding physical layer for processing, and transmitting to the physical layer of the next-stage processing unit via the wireless channel; the physical layer of the next-stage processing unit processing the uplink WiMAX stream, and transmitting to the corresponding MAC processing layer Processing, and transmitting to the flow switching unit via the MAC processing layer; the flow switching unit searches the table 5 according to the CID of the 802.16 MAC frame to obtain the destination flow port 1 and the next hop CID, when confirming the next When the hop CID is the valid value CID1, the CID field of the 802.16 MAC frame header is modified to be CID1, and is forwarded by the flow destination port 1 to the MAC processing layer of the downlink processing unit.

Afterwards, the MAC processing layer of the downlink processing unit receives the WiMAX stream, and after processing the WiMAX stream, the corresponding physical layer transmits the physical layer to the physical layer of the next processing unit via the wireless channel; The physical layer processes the WiMAX stream and transmits it to the corresponding MAC processing layer for processing, and then transmits the corresponding to the corresponding downstream mapping unit; the flow mapping unit searches the table according to the destination MAC address and the VLAN identifier to identify the connection identifier. The MAC address sent by user A and the Ethernet frame whose VLAN ID is identified as MAC-A/VLAN1 are mapped to the WiMAX stream of CID1 and transmitted to the receiving end user B. Embodiment 2 Referring to FIG. 3, the method provided by the present invention includes:

Step S201: A flow switching unit is set between the MAC processing layer of the WiMAX base station or the WiMAX subscriber station and the wired transport stream mapping unit. This step is similar to the description in the first embodiment and will not be described in detail.

Step S202: Allocating a corresponding WiMAX stream CID (Connection Ident If ier; connection identifier) to the sender user and the receiver user, that is, establishing a header identifier of the sender service frame, the data packet or the cell, or a TDM time slot and a corresponding uplink. Corresponding relationship between the CMAX of the WiMAX stream, and the header identifier of the service frame, the data packet or the cell, or the corresponding relationship between the TDM time slot and the corresponding downlink WiMAX flow CID, and the corresponding relationship is saved in the flow mapping relationship table. Step S203: Configure a flow port domain and a fast switching domain corresponding to the CID.

A 16-bit CID defines a flow destination port domain and a fast switching domain, and the destination port domain is used to identify the destination port of the CID. The number of bits in the destination port domain can be based on the maximum supported by a WiMAX system. The number of stream ports is determined. The fast switching domain determines whether a flow switching table needs to be checked.

For example, the aforementioned system assumptions and WiMAX stream port definitions and plans are still used. See Table 1. The port number of the stream can be represented by 4 bits. The fields of the CID can be constructed as shown in Table 7 below.

Table 7

Among them, the parameters in Table 7 are described in Table 8:

Table eight

Step S204: Configure a next hop CID of the CID, and establish a flow exchange table.

Step S205: The sender user sends the service frame, the data packet, the cell, or the time slot to the corresponding stream mapping unit.

Step S206, the flow mapping unit, according to the header of the service frame, the data packet or the cell, or the correspondence between the TDM time slot and the corresponding uplink WiMAX flow CID, the service frame, the data packet, the cell or the time slot. Mapping to a WiMAX stream and transmitting the WiMAX stream to the MAC processing layer of the upstream processing unit.

Step S207: The MAC processing layer of the uplink processing unit processes the WiMAX stream, and then transmits the data to the corresponding physical layer for processing, and transmits the data to the physical layer of the next-stage processing unit via the wireless channel. Step S2Q8: The physical layer of the processing unit of the next stage processes the uplink WiMAX stream, and then transmits the processing to the corresponding MAC processing layer, and transmits the data to the stream switching unit via the MAC processing layer.

Step S209: The flow switching unit directly obtains a corresponding flow port domain and a fast switching domain from the CID of the frame header of the transmitted MAC frame of the WiMAX flow;

Step S210, determining whether it is a fast exchange or a normal exchange according to the bit value in the fast exchange domain, if it is a fast exchange, step S211 is performed; if it is a normal exchange, step S212 is performed;

Step S211, the CID in the MAC frame header is exchanged to the next hop CID, and the exchanged WiMAX stream is transmitted to the MAC processing layer of the downlink processing unit through the acquired destination port, and then steps S112 to S114 are performed. the process of.

Step S212: The WiMAX stream is transmitted to the corresponding stream mapping unit through the acquired stream port, and then the processes of step S115 to step S116 are performed. Implementation process.

First, with the related description in the first embodiment, the WiMAX stream port is defined and planned, as shown in Table 1.

Then proceed with the process of building a business flow:

Step 1: Assign CID2 and CID10 to Ethernet user A, assign CID1 and CID11 to Ethernet user B, and establish an Ethernet flow mapping relationship table, as shown in Table 4 above.

Step 2: Configure a flow port domain and a fast switch domain corresponding to the CID, as shown in Table IX.

Table 9

Step 3: Configure the next hop CID of the CID to form a flow switching table. See Table 10 and Table 10. Source CID Next Hop CID

CID1 ―

CID2 CID1

CID10 ―

CID11 ― When the Ethernet user accesses the Internet, the source MAC address of the sender A and the Ethernet frame with the VLAN ID of the MAC-A/VLAN 10 are sent to the Ethernet stream mapping unit, and the Ethernet stream mapping unit is based on the source MAC address and the VLAN identifier. Checking the fourth, mapping the Ethernet frame of the user A to the WiMAX stream with the connection identifier CID10, and then sending the 802.16 MAC frame to the MAC processing layer of the uplink processing unit; the MAC processing layer of the uplink processing unit After the WiMAX stream is processed, it is transmitted to the corresponding physical layer for processing, and transmitted to the physical layer of the next-stage processing unit via the wireless channel; the physical layer of the next-stage processing unit processes the uplink WiMAX stream, and then transmits the Processing by the corresponding MAC processing layer and transmitting to the flow switching unit via the MAC processing layer; the flow switching unit directly analyzing the fast switching domain in the CID 10 of the 802.16 MAC frame, according to the fast switching domain When the bit value is confirmed as a fast exchange, the flow switching unit directly forwards the 802.16 MAC frame from the flow port 10 to the Ethernet according to the flow destination port field in the CID 10. Mapping unit. Finally, the source MAC address and the VLAN identifier of the Ethernet stream mapping unit are looked up in Table 4, and the WiMAX stream whose connection is identified as CID10 is mapped to an Ethernet frame whose MAC address and VLAN ID are MAC-A/VLAN 10, and transmitted to the upper layer through the Ethernet port. Processing unit. The subsequent processing procedure of the upper processing unit is the same as that of the first embodiment provided by the present invention, and will not be described in detail.

When the interworking of services between different nodes of the Ethernet is implemented, the transmitting end user A sends the source MAC address and the Ethernet frame whose VLAN ID is MAC-A/VLAN1 to the corresponding Ethernet stream mapping unit; the Ethernet stream mapping unit is configured according to The source MAC address and the VLAN identifier lookup table 4, mapping the Ethernet frame of the user A to the WiMAX stream with the connection identifier CID2, and then sending the 802.16 MAC frame to the MAC processing layer of the uplink processing unit; After processing, the MAC processing layer transmits the WiMAX stream to a corresponding physical layer for processing, and transmits the data to the physical layer of the next-stage processing unit via the wireless channel; the physical layer of the next-stage processing unit pairs the uplink WiMAX After the stream processing, the processing is transmitted to the corresponding MAC processing layer, and is transmitted to the stream switching unit via the MAC processing layer; the stream switching unit directly analyzes the 802.16 MAC frame. The fast switching domain in the CID2, when the bit value of the fast switching domain is confirmed to be the normal mode switching, the flow switching unit searches the table according to the 802.16 MAC frame CID to obtain the next hop CID1, and then modifies 802. The CID field of the MAC frame header is CID1, and the port domain of the flow of the CID1 is forwarded by the destination port Por tl to the MAC processing layer of the downlink processing unit.

Afterwards, the MAC processing layer of the downlink processing unit receives the WiMAX stream, and the

After the WiMAX stream is processed, it is transmitted by the corresponding physical layer to the physical layer of the next-stage processing unit via the wireless channel; the physical layer of the next-stage processing unit processes the WiMAX stream and transmits it to the corresponding MAC processing layer for processing. And then transmitted to the corresponding flow mapping unit; the flow mapping unit maps the WiMAX flow with the connection identifier CID1 back to the MAC address sent by the user A and the VLAN identifier as MAC-A according to the destination MAC address and the VLAN identifier lookup table 4. /VLAN1 Ethernet frame, and transmitted to the receiving end user B.

According to the technical solution of the embodiment provided by the present invention, it can be seen that the present invention sets a flow switching unit between a MAC processing layer of a WiMAX base station or a WiMAX subscriber station and a wired transport stream mapping unit, and then implements WiMAX based on the stream switching unit. The method of stream switching unifies a plurality of switching technologies into one switching technology, thereby simplifying the transmission part of the WiMAX node, thereby reducing the cost; when the wire transmission type is increased by the invention, only the mapping with the WiMAX stream is defined. Relationship and exchange relationship, with good scalability; When implementing service interworking between different WiMAX nodes, the present invention can reduce the number of flow mappings of user data packets (or frames, etc.), thereby reducing services between different WiMAX nodes. The delay of transmission. The above is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and those skilled in the art can easily think of changes or replacements within the technical scope of the present disclosure. All 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 method for implementing WiMAX flow switching, comprising:

B. Implementing exchange of WiMAX flows based on the flow switching unit.

The method according to claim 1, wherein the step A specifically includes: setting a flow switching unit between the MAC processing layer and the flow mapping unit of the ΉΜΑΧ base station or the WiMAX subscriber station;

3. The method according to claim 2, wherein the radio resource comprises: a WIMAX station, a sector, a frequency point, and/or a subchannel.

4. The method according to claim 1, wherein between the step A and the step B, the method comprises:

C. Establish a header identifier of the sender packet service data or a correspondence between the TDM time slot and the corresponding uplink WiMAX stream connection identifier CID, and a header identifier of the receiver packet service data packet or a TDM time slot and a corresponding downlink WiMAX flow connection identifier CID. Correspondence relationship

The method according to claim 4, wherein the step C comprises: establishing a correspondence between a virtual path/virtual channel identifier of a transmitter ATM cell and a corresponding uplink WiMAX stream CID, and a receiving ATM cell Corresponding relationship between the virtual path/virtual channel identifier and the corresponding downlink WiMAX stream CID;

Establishing a source MAC address of the sender Ethernet frame and/or a correspondence between the virtual local area network identifier and the corresponding uplink WiMAX flow CID, and a destination MAC address of the receiving end Ethernet frame and/or a correspondence between the virtual local area network identifier and the corresponding downlink WiMAX flow CID Relationship; and, Establish a correspondence between the TDM time slot of the transmitting end and the corresponding uplink WiMAX flow CID, and the corresponding relationship between the receiving end T time slot and the corresponding downlink WiMAX flow CID.

6. The method according to claim 4, wherein the step B comprises:

B1, the flow switching unit acquires a corresponding flow port and a next mega C ID according to the connection identifier in the MAC frame header of the uplink WiMAX flow that is transmitted;

B2, determining whether the next hop CID is valid, if valid, performing step B3; otherwise, performing step B4;

B3, the switching of the connection identifier in the MAC frame header is the next hop cid, and the exchanged WiMAX stream is transmitted to the MAC processing layer of the corresponding processing unit through the acquired flow port; B4, the obtained flow The port transmits the WiMAX stream to a corresponding stream mapping unit.

The method according to claim 4, wherein the step B specifically includes: bl, the flow switching unit acquires a corresponding flow port domain from a CID of a frame header of a WiMAX flow MAC frame that is transmitted to Fast switching domain

B2, according to the bit value in the fast exchange domain to determine whether it is a fast exchange or a normal exchange, if it is a fast exchange, step b3; if it is a normal exchange, step b4;

B3, the connection identifier in the MAC frame header of the WiMAX stream is switched to a corresponding next hop connection identifier, and the exchanged WiMAX stream is transmitted to the MAC processing layer of the corresponding processing unit through the obtained stream port;

B4. The WiMAX stream is transmitted to the corresponding stream mapping unit by using the acquired port of the flow.

The method according to claim 6 or 7, wherein the step B further comprises: the stream mapping unit is connected to the corresponding uplink WiMAX stream according to the header identifier of the packet service data packet or the TDM time slot. Correspondingly, mapping the WiMAX flow back to the original packet service data packet or time slot;

Determining, by the superior processing device, whether the user of the sending end is authorized according to the header identifier or the TDM time slot of the packet data packet of the sending end, and allowing access if authorized; otherwise, denying access; or

The MAC processing layer receives the WiMAX stream, processes the WiMAX stream, hands it to a corresponding physical layer for processing, and transmits the data to the physical layer of the next-stage processing unit via the wireless channel. The physical layer of the next-level processing unit processes the WiMAX stream and transmits it to a corresponding MAC processing layer for processing, and then transmits the data to the corresponding stream mapping unit via the MAC processing layer;

The method according to claim 8, wherein the stream mapping unit maps the WiMAX stream back to the original packet service data packet or the time slot according to the correspondence:

The stream mapping unit maps the WiMAX stream back to the original service frame according to the source MAC address of the sender Ethernet frame and/or the correspondence between the virtual local area network identifier and the corresponding uplink WiMAX stream CID; or

The flow mapping unit maps the WiMAX flow back to the original TDM data packet according to the correspondence between the transmit time T slot and the corresponding uplink WiMAX flow CID.

10. The method according to claim 8, comprising:

The corresponding stream mapping unit maps the WiMAX stream to a corresponding TDM data packet according to the correspondence between the receiving end T and the corresponding downlink WiMAX stream CID, and transmits the TDM data packet to the receiving end.

The method according to claim 4, wherein the step B further comprises: BI. The sending end sends the packet service data packet or time slot to the corresponding flow mapping unit; B II. The flow mapping unit maps the packet service data packet or time slot to a corresponding WiMAX flow according to a header identifier of the sending end packet service data packet or a corresponding relationship between the TDM time slot and the corresponding uplink WiMAX flow CID. And transmitting the WiMAX stream to a MAC processing layer of a corresponding processing unit;

The MAC processing layer of the processing unit processes the WiMAX stream, transmits it to the corresponding physical layer for processing, and transmits the data to the physical layer of the next-stage processing unit via the wireless channel;

BIV. The physical layer of the next-stage processing unit processes the WiMAX stream, transmits it to the corresponding MAC processing layer, and transmits it to the stream switching unit via the MAC processing layer.

The method according to claim 11, wherein the step B II specifically includes:

The stream mapping unit maps the ATM cell to a corresponding WiMAX stream according to a correspondence between a virtual path/virtual channel identifier of the ATM cell of the transmitting end and a corresponding uplink WiMAX stream CID, and transmits the WiMAX stream to the corresponding Processing unit's MAC processing layer; or,

The flow mapping unit maps the Ethernet frame to a corresponding WiMAX stream according to a destination MAC address of the Ethernet frame of the receiving end and/or a correspondence between the virtual local area network identifier and the corresponding downlink WiMAX stream CID, and transmits the WiMAX stream Sending to the MAC processing layer of the corresponding processing unit; or, the flow mapping unit maps the T-data packet to a corresponding WiMAX stream according to the correspondence between the receiving end TOM time slot and the corresponding downlink WiMAX flow CID, and The WiMAX stream is transmitted to the MAC processing layer of the corresponding processing unit.

The method according to any one of claims 4 to 11, wherein the packet service data packet comprises a service frame, a data packet, and a cell.