WO2007051428A1

WO2007051428A1 - A method and serving gateway for the service forwarding between the gateways in the serving network

Info

Publication number: WO2007051428A1
Application number: PCT/CN2006/002968
Authority: WO
Inventors: Jing Chen
Original assignee: Huawei Technologies Co., Ltd.
Priority date: 2005-11-05
Filing date: 2006-11-06
Publication date: 2007-05-10
Also published as: WO2007051428A8; CN1859285A

Abstract

A method for the service forwarding between the gateways in the serving network, comprises: after the serving network receives the access request message, it determines whether to process the access request message by itself; if the serving gateway determines to process by itself, the serving gateway processes the access request itself, and ends the flow; otherwise the serving gateway forwards the access request message to another object gateway. A serving gateway is provided by the present invention for implementing the service forwarding between the gateways. By enabling to intercommunicate the resource using state between each corresponding gateway in the WiMAX access serving network, and using the timely serving forwarding to adjust duly the load of each corresponding gateway, the present invention balances the load well to ensure the system to normally work and improve the system efficiency.

Description

Method for forwarding service between gateways in service network and service gateway

Technical field

The present invention relates to a WiMAX access service network technology, and more particularly to a method and service gateway for inter-gateway service forwarding in a WiMAX access service network. Background of the invention

With the rapid development of Internet services and the widespread use of wireless networks, WiMAX systems have gained a great deal of application and attention with their good wireless access characteristics. How WiMAX systems are applied to mobile users to better provide packet forwarding or routing between networks and mobile users has become a new hotspot in the industry.

The WiMAX network architecture system is shown in Figure 1. The access service network (ASN) provides wireless access services for WiMAX terminals, including a base station (BS) and an access service network gateway (ASN-GW). The Connection Service Network (CSN) provides IP connectivity services for WiMAX terminals. The mobile subscriber station (MSS) is a mobile user equipment, and the subscriber station (SS) is a user equipment, and the user can use these devices to access the WiMAX network. The connection service network is a network device belonging to a network service provider (NSP), and one access service network can connect to multiple connection service networks. The base station and the access service network gateway may have a many-to-many connection relationship. As shown in FIG. 1, the gateway 1 may simultaneously connect the base station 1 and the base station 2, and the base station 1 may also be connected to the gateway 1 and the gateway 2 at the same time.

The base station used by the mobile subscriber station/user station access is called a serving base station (Serving BS). For a mobile subscriber station/subscriber station that is accessed by a serving base station, a gateway connected to the base station through the R6 interface is called a Serving ASN-GW. For example, the gateway 1 in FIG. 1 is a base station. 1 or a service gateway of a mobile subscriber station/subscriber station accessed by the base station 2. Provides a connection between the access service network and the home agent (HA) within the connected service network The gateway connected to the home agent through the R3 interface is called the Anchor ASN-GW. From the data perspective, the packet service datagram of the downlink mobile subscriber station/subscriber station is transmitted from the home agent in the connection service network to the access service through the R3 interface between the home agent and the anchor gateway in the access service network. In the anchor gateway within the network. After the downlink mobile subscriber station/substation packet service datagram enters the access service network, it is transmitted to the service gateway of the mobile subscriber station/user station through the R4 interface inside the access service network, and the service gateway passes through the access service network. The R6 interface between the internal gateway and the base station and the R1 interface between the base station and the mobile subscriber station/subscriber station transmit the packet service datagram to the mobile subscriber station/subscriber station. The uplink data is then transmitted from the mobile subscriber station/subscriber station to the connected service network along the opposite path and to the peer user. As described above, in the interface inside the access service network, there is a corresponding uplink and downlink data path for each service flow of each mobile subscriber station/subscriber station, and these paths are in each service flow. It is established based on the quality of service (QoS) requirements of each service flow and the way in which the data path is adopted. When the business ends, that is, when the business flow is aborted, the corresponding data path needs to be released.

When the mobile subscriber station/user station moves from the coverage area of one base station to the coverage area of another base station in the mobile process, and the serving base station and the target base station belong to the same access service network gateway, the handover that occurs is called R6 interface mobility. Sexual switching. When a mobile subscriber station/user station moves from the coverage area of one base station to the coverage area of another base station in the mobile process, and the serving base station and the target base station belong to different access service network gateways, the handover that occurs is called R4 interface mobility. Sexual switching. As shown in FIG. 2, before the R4 interface handover occurs, the mobile subscriber station/user station accesses the network using the base station 2, and connects to the connection service network through the bold link. As shown in FIG. 3, after the R4 interface handover occurs, the mobile subscriber station/subscriber station accesses the network using the base station 3, and the mobile subscriber station/subscriber station connects to the connection service network through another thickened link. It can be seen that the mobile subscriber station/subscriber station transmits data through the R4 interface data path between the new service gateway and the anchor gateway. As shown in FIG. 4, the R4 interface switching process specifically includes: the serving base station sends a handover request to the serving gateway, where the serving gateway forwards the handover request to all target base stations connected to the target gateway by the target gateway; and the target base station responds to the handover request. Transmitting the response information to the target gateway, the target gateway forwarding the response information to the serving base station by using the serving gateway; the serving base station making a handover indication to the selected target base station, and forwarding the handover indication to the serving gateway and the target gateway Target base station; the selected target base station sends a mobile subscriber station/user station or session request to the target gateway, and is forwarded by the target gateway to the serving gateway; the serving gateway responds to the request and sends the mobile subscriber station/user to the target base station through the target gateway. The station or session request response; the target base station sends a handover indication response to the serving base station through the target gateway and the serving gateway, and the handover process is completed.

Generally, there are multiple access service gateways in an access service network. How to perform service processing between the gateways to achieve load balancing becomes a problem to be solved. The current service forwarding is generally performed by the base station: The gateway performs periodic resource broadcast on the base station, and the base station also measures delay information with a certain gateway path, and the base station determines an appropriate gateway according to the resource status of the gateway. There are many disadvantages in this way: First, the base station is at the edge of the network and cannot fully understand the resource status of each gateway in the entire network, so the effect of load balancing must be affected; the processing load of the base station is increased; the number of base stations in the network is large At the gateway, the resource broadcast by the gateway occupies more system resources; there is no interworking resource status between the gateways. Therefore, in the R4 interface switch, when the service gateway needs to select the target gateway, the service gateway is not clear about the target base station. The resource status of multiple gateways connected will not be able to select the target gateway according to the resource status to achieve load balancing. Summary of the invention

In view of this, the object of the present invention is to provide a method and service gateway for inter-gateway service forwarding in a service network, so that load balancing can be achieved between gateways to improve communication quality. In order to achieve the above objective, the present invention provides a method for forwarding services between gateways in a service network, the method comprising the following steps:

A. After receiving the access request message, the service gateway determines whether it processes the access request message; if it determines that it processes, perform step B; otherwise, perform step C;

B. The service gateway processes the access request by itself, and ends the process;

C. The serving gateway forwards the access request message to another target gateway.

The service gateway in step A determines whether the access request message is processed by the service gateway. The service gateway determines whether the resource occupancy rate has reached the preset resource occupancy threshold. If it has been reached, it determines that it does not process the packet. Did not reach, make sure to handle it yourself.

The resource status information is obtained before the service gateway determines whether it processes the access request message. If not, the resource status information of the related gateway is requested.

The method for obtaining related gateway resource status information includes:

The serving gateway sends a resource status request message to the related gateway, where the resource status request message includes resource status information of the serving gateway itself;

And the related gateway returns a resource status response message to the serving gateway, where the resource status response message carries the resource status information of the related gateway.

The method for obtaining the related gateway resource status information includes: transmitting, by the inter-gateway, a resource status broadcast message, and the service gateway obtains resource status information of the related gateway by using the resource status broadcast message.

The resource status includes at least one of the following: a user capacity resource, a bandwidth resource, a path transmission delay and a bit error rate, a processor resource, a memory resource, an ingress port resource, and an egress port resource.

The access includes initial network access and handover access.

Wherein, before performing step C, the method further comprises: the service gateway determining whether it is still The gateway has a connection relationship; if yes, perform step C; otherwise, perform steps

After the service gateway determines whether it has a connection relationship with other gateways, the service gateway further determines whether the resource occupancy rate is the lowest. If yes, step B is performed; otherwise, the step is performed. .

The method further includes determining, as a target gateway, a gateway with the lowest resource occupancy rate among other gateways.

The another target gateway is a gateway connected to the serving gateway and the base station managed by the base station is also managed by the serving gateway, and/or the base station connected to the serving gateway and managed by the base station and the serving gateway has A gateway to a neighboring cell.

The service gateway sets a forwarding number parameter in the packet when forwarding the access request packet to the target gateway. Each time the packet is forwarded, the value of the forwarding number is increased by one, and the number of forwarding times reaches one. When the preset value is used, the current serving gateway is the final access gateway, and the access request is processed.

The present invention also provides another method for forwarding traffic between gateways in a service network, the method comprising the following steps:

The inter-gateway broadcasts a resource status broadcast message to obtain resource status information of the relevant gateway.

When the serving gateway determines that its resource occupancy rate reaches a preset threshold, it actively sends a request handover request message to the serving base station, and requests the serving base station to switch part of the mobile subscriber station/user station to the base station connected to the relevant gateway.

The request switching request message includes a recommended target gateway list, and the method further includes: after receiving the handover indication of the mobile user station/user station, the serving base station selects a target gateway in the recommended target gateway list, and The information of the target gateway is added to the handover indication and sent to the serving gateway.

Wherein the request switching request message further includes switching the mobile subscriber station/user station The percentage, the method further includes:

After receiving the handover indication of the mobile subscriber station/subscriber station, the serving base station switches part of the mobile subscriber station/subscriber station to the base station connected to the relevant gateway according to the percentage.

The present invention further provides a service gateway, including a receiving unit, a determining unit, a processing unit, and a forwarding unit, wherein the receiving unit notifies the determining unit after receiving the access request message, and the determining unit determines whether to process the access request message. If the process is determined, the notification processing unit processes the access request; if it is determined not to process, the notification forwarding unit forwards the access request message to another target gateway.

Preferably, the gateway further includes a first detecting unit and a resource threshold setting unit, where the first detecting unit detects the current resource occupancy rate of the current serving gateway, and the determining unit determines whether to process the access request message according to the first A detecting unit determines whether the resource occupancy rate of the serving gateway has reached the resource occupancy threshold set by the resource threshold setting unit, and if not, the determining unit notifies the processing unit to process the access request; if it has been reached, Then, the determining unit notifies the forwarding unit to forward the access request message to another target gateway.

Preferably, the gateway further includes a second detecting unit and a selecting unit, and before the forwarding unit forwards the access request message to another target gateway, the second detecting unit detects whether the serving gateway further has a connection relationship with other gateways; If yes, the selecting unit selects the gateway with the lowest resource occupancy as the target gateway, and the forwarding unit forwards the access request packet to the selected target gateway; if not, the processing unit processes the access request packet.

Preferably, before the selecting unit selects the gateway with the lowest resource occupancy rate as the target gateway, the first detecting unit detects whether the serving resource occupancy rate of the serving gateway is the lowest. If yes, the first detecting unit notifies the processing unit to process the access request. The message; otherwise, the first detecting unit notifies the selecting unit to select the gateway with the lowest resource occupancy rate as the target gateway.

Preferably, the forwarding unit further includes a counter and a threshold value setter, and forwards When the unit forwards the access request message to the target gateway, a parameter of the number of forwarding times is set in the packet. Each time the message is forwarded, the counter increments the value of the number of times of forwarding, and when the number of times of forwarding reaches the threshold, the threshold is set. The number of times threshold, the forwarding unit notifies the processing unit to process the access request.

In the present invention, since the serving gateway can determine whether it processes the access request, if it does not process itself, the access request can be forwarded to another target gateway, so that the gateway can understand the entire network more comprehensively than the base station. The resource status of other gateways can be load balanced according to this, so the effect of load balancing is greatly improved.

In addition, since the processing capability of the gateway is higher than that of the base station, the processing load of the base station can be alleviated, and the burden on the gateway is not greatly affected.

Again, since the number of gateways in the network is much smaller than the number of base stations, resource broadcasting in the entire network occupies less system resources.

Further, since the gateways can communicate with each other in a resource state, in the R4 interface switching, the serving gateway can select the target gateway according to the resource status, thereby further enhancing the effect of load balancing. BRIEF DESCRIPTION OF THE DRAWINGS

The above and other features and advantages of the present invention will become apparent to those skilled in the <RTIgt

Figure 1 is a WiMAX network architecture diagram;

2 is a data link diagram used by a mobile subscriber station/subscriber station before the R4 interface is switched; FIG. 3 is a data link diagram used by the mobile subscriber station/subscriber station after the R4 interface is switched; FIG. 4 is a schematic diagram of the R4 interface handover procedure. ;

FIG. 5 is a schematic diagram of a service forwarding process for requesting initial network access according to the first embodiment of the present invention; FIG. 6 is a schematic diagram of a service forwarding process for requesting handover access according to a second embodiment of the present invention; FIG. 7 is a schematic flowchart of a service gateway actively initiating a handover process according to a third embodiment of the present invention;

Figure 8 is a block diagram showing the structure of a communication system in accordance with a preferred embodiment of the present invention.

Mode for carrying out the invention

The invention will be described in detail below with reference to the drawings and specific embodiments.

FIG. 5 is a schematic diagram of a service forwarding process for requesting initial network access according to the first embodiment of the present invention. In this embodiment, the serving gateway obtains resource status information of the related gateway by periodically transmitting a resource status broadcast message between the gateways.

The relevant gateway here comprises: a gateway connected to the serving gateway and managed by the base station is also managed by the serving gateway, and/or a base station connected to the serving gateway and managed by the base station and the serving gateway has a neighboring cell Gateway. The meaning of the associated gateway in this embodiment is also applicable to other embodiments.

Specifically, each gateway in the access service network periodically sends resource status broadcast messages to its related gateways to broadcast its resources and load conditions. The packet carries one or any combination of the following information: user capacity resource status, bandwidth resource status, path transmission delay and bit error rate, processor resource status, memory resource status, ingress port resource status, and egress port resource status. Specifically, it may be related to: the user capacity resource usage ratio of the gateway, the total user capacity of the gateway, the number of users accessed by the gateway, the remaining user capacity of the gateway, the amount of users accessed by the gateway using a certain QoS level, and the bandwidth resources of the gateway. Proportion, total bandwidth of the gateway, remaining bandwidth of the gateway, bandwidth used by the gateway, path transmission delay between the gateway and the base station, path transmission error rate between the gateway and the base station, gateway processor resource occupancy, gateway Total processor resources, used resources of the gateway processor, remaining resources of the gateway processor, occupancy of the gateway memory resource, total resources of the gateway memory, resources used by the gateway memory, remaining resources of the gateway memory Source, gateway ingress port resource usage, gateway ingress port total traffic, gateway ingress port used traffic, gateway ingress port remaining traffic, gateway outbound port resource occupancy, gateway outbound port total traffic, gateway outbound port used traffic, and gateway out Port remaining traffic, etc.

As shown in Fig. 5, in the first embodiment of the present invention, first, in step S51, the service gateway receives an access request message from the serving base station or the mobile subscriber station/subscriber station from the other gateway.

In step S52, the service gateway determines whether the resource occupancy rate of the service has reached the preset threshold, to determine whether to process the access request of the mobile subscriber station/user station by itself. If the threshold is not reached, step S57 is performed; If the threshold has been reached, step S53 is performed.

In step S53, the serving gateway determines whether it has a connection relationship with other gateways. If yes, and the serving gateway has obtained the resource status information of the related gateways through the resource broadcast, step S54 is performed; otherwise, step S57 is performed. In this embodiment, each gateway obtains the resource status information of the related gateway by using the periodic resource broadcast manner. Therefore, when receiving the access request message, it is not necessary to request to obtain the resource status information of the related gateway, as long as the latest broadcast is used. The result is fine.

In step S54, the serving gateway determines whether the resource occupancy rate is the most determined to determine whether to process the access request of the mobile subscriber station/substitute station. If it does not process itself, step S55 is performed; if it is processed by itself, step S57 is performed.

In step S55, the serving gateway selects the gateway with the lowest resource occupancy rate as the target gateway in the relevant gateway, and forwards the access request message of the mobile user station/user station to the selected gateway, and the access request message The number of forwards is increased by 1.

In step S56, the selected target gateway receives the access request message of the mobile user station/user station as the serving gateway, and determines whether the number of forwarding times reaches a preset value. If yes, step S57 is performed; if not, step S52 is performed. . In step S57, the serving gateway processes the access request of the mobile subscriber station/subscriber station as the final target gateway, and completes the subsequent access processing.

In this embodiment, in order to prevent the gateway from mutually forwarding the access request without restriction, the number of times of forwarding is set in the forwarded access request message. Each time the access request message is forwarded, the number of times of forwarding is increased by 1. When the number of times of forwarding reaches a preset value, it is not forwarded, but the last gateway handles the access request of the mobile subscriber station/user station. This preset value can be configured as an operational parameter throughout the network.

Of course, in this embodiment, the method for sending the resource status request message may be used to enable the service gateway to obtain the resource status information of the related gateway, that is, in step S53, the resource status information is not obtained by periodically broadcasting the resource. Instead, the serving gateway sends a resource status request message to the relevant gateway, and the related gateway returns a resource status response message carrying its own resource status information to the serving gateway, and the serving gateway determines the resource status of the other gateway according to the received response message.

FIG. 6 is a schematic diagram of a service forwarding process for requesting handover access according to a second embodiment of the present invention. As shown in FIG. 6, first in step S61, the serving gateway receives a handover request message from the serving base station or a mobile subscriber station/user station from another gateway, the handover request message containing the target base station information.

In step S62, the serving gateway determines whether the resource status information of the relevant gateway has been obtained. If it has been obtained, step S63 is performed; if not, steps S621 and S622 are performed.

In step S621, the serving gateway sends a resource status request message to the relevant gateway, and the resource status request message includes its own resource status information.

In step S622, the relevant gateway returns a resource status response message to the service gateway, and the resource status response message includes the own resource status information of the relevant gateway, and then executes the step S73.

The target base station is carried in the handover request from the serving base station or from other gateways Information, so information about the gateway connected to the target base station can be obtained. The definition of the resource status is the same as that of the first embodiment.

In step S63, the gateway determines whether the resource occupancy rate is the lowest, to determine whether to process the handover request of the mobile subscriber station/user station by itself. If it does not process itself, step S64 is performed; if it is processed by itself, step S66 is performed.

In step S64, the gateway with the lowest resource occupancy rate is selected as the target gateway in the relevant gateway, and the handover request message from the mobile subscriber station/user station is forwarded to the selected target gateway, and the number of forwardings in the request message is added. 1.

In step S65, the selected target gateway receives the handover request message of the mobile subscriber station/substitute station, and determines whether the number of forwarding times reaches a preset value. If yes, step S66 is performed; if not, step S62 is performed.

In step S66, the current serving gateway processes the handover request of the mobile subscriber station/user station as the final serving gateway, and completes the subsequent access processing.

In this embodiment, similar to the first embodiment, after the step S61, the following steps are added: The serving gateway determines whether the resource occupancy rate of the service has reached a preset threshold to determine whether to process the mobile subscriber station by itself. / User station switching request, if it has been reached, step S62 is performed; if not, step S66 is performed. In this way, the future load will be allocated to other gateways only after the gateway's resource occupancy reaches a preset threshold.

In the meantime, the present embodiment can also remove the step S62 as in the first embodiment, and obtain the resource status information of the related gateway by using the periodic resource broadcast.

FIG. 7 is a schematic flowchart of a service gateway actively initiating a handover process according to a third embodiment of the present invention. In this embodiment, as in the first embodiment, each gateway in the access service network periodically sends a resource status broadcast message to its associated gateway to broadcast its resource status information. Further, in the present embodiment, the definition of the resource state is also the same as that of the first embodiment. If the service gateway wants to reduce the proportion of its own resources due to operation and maintenance, or if it finds that its own resource usage has reached a preset threshold, it learns the related gateway based on the resource status information of the relevant gateway obtained by the periodic resource broadcast. If the resource occupancy rate is low, the serving gateway may initiate a handover procedure and send a handover request to the serving base station, requesting the serving base station to switch the services of the part of the mobile subscriber station/user station to the base station connected to the relevant gateway.

As shown in FIG. 7, in the third embodiment, first, in step S71, the serving gateway determines whether the resource occupancy rate has reached a preset threshold. If it has been reached, step S72 is performed; if not, the interval is after a period of time. Continue to judge.

In step S72, the serving gateway decides to transfer part of the load to the relevant gateway, and selects the related gateways with the lower resource occupancy rate to form the recommended target gateway list according to the resource state information of the related gateway obtained by the periodic resource broadcast.

Certainly, similar to the previous two embodiments, the method for periodically transmitting the resource status request message to the relevant gateway and receiving the resource status response of the relevant gateway may be used instead of the periodic resource broadcast method. Obtain resource status information of the relevant gateway.

In step S73, the serving gateway actively sends a request handover request message to the serving base station, and requests the serving base station to switch the service of the part of the mobile subscriber station/user station to the relevant gateway, where the request handover request message includes the recommended target gateway list and the service. The percentage of mobile subscriber stations/user stations that are handed over within the base station.

In step S74, after receiving the request handover request message, the serving base station determines the mobile subscriber station/user station that needs to be handed over according to the percentage of the switched mobile subscriber station/user station, and sends a handover request message thereto.

In step S75, the mobile subscriber station/user station that received the handover request message initiates a handover indication to the serving base station.

In step S76, after receiving the handover indication, the serving base station selects in the recommended target gateway list. Select an associated gateway as the target gateway, and add the information of the target gateway to the handover indication and send it to the serving gateway.

In step S77, after receiving the handover indication sent by the serving base station, the serving gateway sends a handover indication to the selected target gateway.

At step S78, the execution of the specific handover procedure is started, and since it belongs to the prior art, it will not be described in detail herein.

As shown in FIG. 8, a schematic diagram of a communication system according to a preferred embodiment of the present invention includes a mobile subscriber station/subscriber station, a base station, and a plurality of gateways, wherein one of the plurality of gateways serves as a serving gateway. The service gateway includes a receiving unit, a determining unit, a processing unit, a forwarding unit, a first detecting unit, a second detecting unit, a selecting unit, and a resource interpretation setting unit, wherein the forwarding unit further includes a counter and a number threshold setter.

In the communication system, in order to timely adjust the load of each relevant gateway, and well balance the load, to ensure the normal operation of the system, improve system efficiency, when there is more traffic or service gateway resources are tight, it can be between multiple gateways. Timely business forwarding, the main work is as follows.

The receiving unit of the serving gateway receives an access request message from the base station or from another gateway, and the access request message from the base station or other gateway may be an initial network access request message of the mobile user station/user station, It may be a handover access request message of the mobile subscriber station/subscriber station.

When the mobile subscriber station/user station requests an access request message for the initial network access, the working process can refer to FIG. 5, which mainly includes the following steps:

551. The receiving unit of the serving gateway receives an access request message from a serving base station or a mobile subscriber station/user station from another gateway.

552, the resource threshold setting unit sets a resource occupancy threshold of the serving gateway, the first detecting unit detects the current resource occupancy rate of the current serving gateway, and the determining unit determines whether the current resource occupancy rate of the current serving gateway detected by the first detecting unit is already Reach resource threshold Setting a resource occupancy threshold set by the unit to determine whether the processing unit processes the access request of the mobile subscriber station/user station. If the threshold is not reached, step S57 is performed; if it has been reached, step S53 is performed.

553. The second detecting unit of the serving gateway detects whether the serving gateway further has a connection relationship with other gateways. If yes, and the serving gateway has obtained the resource status information of the connected gateways by using the broadcast, step S54 is performed; if not, Step S57 is performed. In this embodiment, each gateway obtains related gateway resource status information by means of periodic resource broadcast. Therefore, when receiving the access request, it is not necessary to obtain related gateway resource status information, as long as the result obtained by the latest broadcast is used.

554. The first detecting unit of the serving gateway further determines whether the resource occupancy rate is the lowest, to determine whether to process the access request of the mobile user station/user station by itself, and if the first detecting unit determines that the resource occupancy rate is not the lowest, performing Step S55: If the first detecting unit determines that the resource occupancy rate is the lowest, the processing unit is notified to perform step S57.

555. The selecting unit selects, as the target gateway, the gateway with the lowest resource occupancy rate in the related gateway, and the forwarding unit forwards the access request of the mobile user station/user station to the selected gateway, and the counter in the forwarding unit requests the packet. The number of forwardings in the plus is 1.

556. The selected target gateway receives the access request message of the mobile user station/substitute station as the serving gateway, and the counter in the forwarding unit determines whether the number of forwarding times reaches the threshold of the number of times set by the threshold value setter. If yes, perform the step. S57. If not, step S52 is performed.

557. The processing unit of the serving gateway processes the access request of the mobile user station/user station, and performs subsequent access processing.

As an improvement of the present invention, in order to prevent the above-mentioned access requests from being forwarded between the gateways without restriction, the number of times of forwarding is added to the access request message forwarded by the forwarding unit. Each time the access request is forwarded, the counter forwarding number in the forwarding unit is incremented by one. After the number of times the threshold is set, the forwarding threshold is set to be no longer forwarded, and the last gateway accesses the mobile subscriber station/user station. The number of forwarding times threshold can be uniformly configured as an operational parameter throughout the network.

If the access request received by the serving gateway is a handover request from a mobile subscriber station/subscriber station of another serving gateway, the working process may refer to FIG. 6, which mainly includes the following steps: S61. The receiving unit of the serving gateway receives the slave base station from the serving base station. Or a handover request message from a mobile subscriber station/user station of another gateway, where the handover request includes target base station information. If it has been obtained, step S63 is performed; if not obtained, requesting to obtain resource status information of other related gateways, and then performing step S63. Among them, other related gateways refer to gateways that have a connection relationship with the target base station. Since the target base station information is carried in the handover request from the serving base station or from other serving gateways, the information of the gateway connected to the target base station can be obtained by a certain method. The definition of the resource status is the same as that of the first embodiment.

563. The first detecting unit of the serving gateway determines whether the resource occupancy rate is the lowest, to determine whether to process the handover access request of the mobile user station/user station by itself, and if the first detecting unit determines that the resource occupancy rate is not the lowest, the execution is performed. Step S74: If the first detecting unit determines that the resource occupancy rate is the lowest, the processing unit is notified, and step S76 is performed.

564. The selecting unit selects, as the target gateway, the gateway with the lowest resource occupancy rate in the related gateway, and the forwarding unit forwards the handover access request message of the mobile user station/user station to the selected gateway, and the counter in the forwarding unit will The number of forwardings in the request message is increased by 1.

565. The selected target gateway receives the handover request of the mobile subscriber station/substitute station, and the counter in the forwarding unit determines whether the number of forwarding times reaches the number of forwarding thresholds set by the number threshold setter. If step S66 is reached, step S62 is not performed.

566. The processing unit of the serving gateway processes the handover request of the mobile subscriber station/user station, and completes subsequent access processing. In the foregoing step S62, the method for requesting to obtain related gateway resource status information includes the following steps:

S621, the serving gateway sends a resource status request message to the related gateway, and the resource status request message includes its own resource status information.

5622. The related gateway returns a resource status response packet to the gateway, and the return message includes resource status information of the related gateway.

In addition, after the step S61, the following steps may be added: the resource threshold setting unit sets the resource occupancy threshold of the serving gateway, the first detecting unit detects the current resource occupancy rate of the current serving gateway, and the determining unit determines the current detected by the first detecting unit. Whether the resource occupancy rate of the serving gateway has reached the resource occupancy threshold set by the resource threshold setting unit to determine whether the processing unit processes the access request of the mobile subscriber station/user station, and if yes, step S62; Then, step S66 is performed.

In this way, the future load (mobile subscriber station/user station) will be assigned to other gateways only if the load of one gateway reaches a threshold.

This embodiment can also remove step S62 and use periodic resource broadcast to obtain related gateway resources and load status information.

In summary, the method and service gateway of the present invention can forward services in time, adjust the load of each relevant gateway in time, balance the load well, ensure the normal operation of the system, and improve system efficiency.

The above is only the preferred embodiment of the present invention, and is not intended to limit the present invention. Any modifications, equivalents, improvements, etc., which are made within the spirit and principles of the present invention, should be included in the present invention. Within the scope of protection.

Claims

Claim

A method for forwarding services between gateways in a service network, characterized in that:

The method according to claim 1, wherein the service gateway determines whether the access request message is processed by the service gateway in step A: the service gateway determines whether the resource occupancy rate has reached the preset resource occupancy rate. The threshold, if it has been reached, determines that it does not process itself; if it does not, decide to handle it yourself.

The method according to claim 2, wherein before the serving gateway determines whether to process the access request message, the method further includes: the serving gateway determining whether the related gateway connected to the serving gateway has been obtained The resource status information, if not obtained, requests the resource status information of the relevant gateway.

The method according to claim 3, wherein the method for obtaining related gateway resource status information comprises:

The monthly service gateway sends a resource status request message to the related gateway, where the resource status request message includes the resource status information of the serving gateway;

The method according to claim 3, wherein the method for obtaining the related gateway resource status information comprises: transmitting, by the inter-gateway, a resource status broadcast message, where the serving gateway obtains the related information by using the resource status broadcast message. Resource status information of the gateway.

The method according to any one of claims 3 to 5, characterized in that The resource status includes at least one of the following: user capacity resources, bandwidth resources, path transmission delay and bit error rate, processor resources, memory resources, ingress port resources, and egress port resources.

7. The method according to claim 1, wherein the access comprises network initial access and handover access.

The method according to claim 1, wherein, before performing step C, the method further comprises: the service gateway determining whether there is still a connection relationship with other gateways; if yes, performing step C; otherwise, performing step ^

The method according to claim 8, wherein after the serving gateway determines whether it has a connection relationship with other gateways, the service gateway further determines whether the resource occupancy rate is the lowest. If yes, step B is performed. Otherwise, go to step C.

10. The method according to claim 8 or 9, wherein the method further comprises determining a gateway with the lowest resource occupancy rate in the other gateway as the target gateway.

The method according to claim 1 or 2, wherein the another target gateway is a gateway connected to the serving gateway and the base station managed by the base station is also managed by the serving gateway, or is connected to the serving gateway. And the base station managed by the base station and the serving gateway managed by the base station has one gateway of the neighboring cell.

The method according to claim 1 or 8 or 9, wherein the serving gateway sets a forwarding number parameter in the packet when forwarding the access request packet to the target gateway, and the packet is forwarded once. The value of the number of forwarding times is increased by 1. When the number of forwarding times reaches a preset value, the current serving gateway is the final access gateway, and the access request is processed.

A method for forwarding service between gateways in a service network, comprising: transmitting, by a gateway, a resource status broadcast message, and obtaining resource status information of the related gateway;

When the serving gateway determines that the resource occupancy rate reaches a preset threshold, it actively sends a request handover request message to the serving base station, and requests the serving base station to select a part of the mobile subscriber station/user station. Switch to the base station connected to the relevant gateway.

The method according to claim 13, wherein the request handover request message includes a recommended target gateway list, and the method further includes:

After receiving the handover indication of the mobile subscriber station/subscriber station, the serving base station selects the target gateway in the recommended target gateway list, and adds the information of the target gateway to the handover indication and sends it to the serving gateway.

The method according to claim 14, wherein the request handover request message further includes a percentage of switching the mobile subscriber station/user station, the method further comprising:

A service gateway, comprising: a receiving unit, a determining unit, a processing unit, and a forwarding unit, wherein the receiving unit notifies the determining unit after receiving the access request message, and the determining unit determines whether to process the access request report If the process is determined, the notification processing unit processes the access request; if it is determined not to process, the notification forwarding unit forwards the access request message to another target gateway.

The service gateway according to claim 16, further comprising a first detecting unit and a resource threshold setting unit, wherein the first detecting unit detects a resource occupancy rate of the current serving gateway, and the determining unit determines whether The determining, by the first detecting unit, whether the resource usage rate of the serving gateway has reached the resource occupancy threshold set by the resource threshold setting unit, if not, the determining unit notifies the processing unit Processing the access request; if it has been reached, the determining unit notifies the forwarding unit to forward the access request message to another target gateway.

The service gateway according to claim 17, further comprising a second detecting unit and a selecting unit, wherein the forwarding unit forwards the access request message to another destination Before the target gateway, the second detecting unit detects whether the serving gateway further has a connection relationship with other gateways; if yes, the selecting unit selects the gateway with the lowest resource occupancy rate as the target gateway, and the forwarding unit forwards the access request message to the selected The target gateway; if not, the processing unit processes the access request message.

The service gateway according to claim 18, wherein before the selecting unit selects the gateway with the lowest resource occupancy rate as the target gateway, the first detecting unit detects whether the resource occupancy rate of the serving gateway is the lowest, and if yes, The first detecting unit notifies the processing unit to process the access request message; otherwise, the first detecting unit notifies the selecting unit to select the gateway with the lowest resource occupancy rate as the target gateway.

The service gateway according to any one of claims 16 to 19, wherein the forwarding unit further comprises a counter and a number threshold setting device, and the forwarding unit forwards the access request message to the target gateway in the message Setting a number of forwarding times parameter, each time the message is forwarded, the counter increments the value of the number of forwarding times by 1. When the number of times of forwarding reaches the threshold number of times set by the number threshold setting, the forwarding unit notifies the processing unit to process the connection. Into the request.