CN104125607A - User plane congestion processing method and device, and service gateway - Google Patents
User plane congestion processing method and device, and service gateway Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/02—Traffic management, e.g. flow control or congestion control
- H04W28/10—Flow control between communication endpoints
- H04W28/14—Flow control between communication endpoints using intermediate storage
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L47/00—Traffic control in data switching networks
- H04L47/10—Flow control; Congestion control
- H04L47/24—Traffic characterised by specific attributes, e.g. priority or QoS
- H04L47/2458—Modification of priorities while in transit
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/02—Traffic management, e.g. flow control or congestion control
- H04W28/0205—Traffic management, e.g. flow control or congestion control at the air interface
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
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- H04W28/0289—Congestion control
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Abstract
The invention provides a user plane congestion processing method and device, and a service gateway (S-GW). The method include the following steps: receiving congestion information that user plane congestion happens to a base station; according to the priorities of data packets sent to the base station, caching the data packets; and issuing the cached data packets according to the priorities. Through the user congestion processing method and device, and the S-GW, problems that in related technologies, when a user plane of a base station is congested, base-station processing capability congestion and link congestion between the base station and the S-GW still exit are solved so that effects that when the user plane of the base station is congested, a rate at which the S-GW sends the data packets to the base station is reduced so that a problem of congestion of cell air-interface wireless resources is effectively solved, extra processing on the base station is not added, and links between the base station and the S-GW are effectively relieved are achieved.
Description
Technical field
The present invention relates to the communications field, in particular to a kind of user's face congestion processing method, device and gateway.
Background technology
Fig. 1 is the schematic diagram of wireless communication system in correlation technique, and as shown in Figure 1, in this wireless communication system, the major function of each equipment is as follows:
Terminal: be also subscriber equipment (User Equipment is called for short UE), subscriber equipment, by wireless access base station, passes through Non-Access Stratum (Non-Access Stratum, referred to as NAS) interface intercommunication between terminal and the mobile management unit of core net.
Radio Access Network RAN(Radio Access Network, referred to as RAN): be in charge of foundation and the maintenance of the on-air radio resource between UE and radio access node (NodeB and/or evolution NodeB).The strength disposal to data message of base station is carrying, each carrying has a QoS class indication (QoS Class Identifier, referred to as QCI) identify needed service quality (Quality of Service, referred to as) classification, all packets that transmit this carrying base station adopt identical QoS classification to process.
Mobility Management Entity, is a chain of command entity, stores the server of user data temporarily, be in charge of and store UE context (such as UE/ user ID, mobility management states, user security parameters etc.), be responsible for mobile management and set up user plane bearer.Mobility Management Entity is called MME(Mobility Management Entity in 4G system, and independent in mind and action is MME), in 2G and 3G system, be called Serving GPRS Support Node (Serving GPRS Support Node, referred to as SGSN).Between MME and RAN, be connected by S1-C interface, between SGSN and RAN, be connected by Iu-C interface, C represents chain of command.
Attaching position register (Home Location Register, referred to as HLR), is positioned at home network, and major function is to provide CAMEL-Subscription-Information and certification.In the time that user accesses mobile management unit from visited place, need to from HLR, obtain authentication information and terminal is authenticated, if authentication success continues to obtain CAMEL-Subscription-Information from HLR.HLR checks whether allow user to roam into visit net mobile management unit simultaneously.
Gateway (Serving Gateway, referred to as S-GW), it is user's face anchor point that a user moves between the 3G of 2/3G and evolution system, S-GW is also responsible for when user is under idle condition simultaneously, when receiving downlink data packet, data cached and trigger mobility management unit user is initiated to paging.Between S-GW and mobile management entity, be connected by interface, this interface is based on chain of command GPRS channel agreement (GPRS Tunnelling Protocol-C, referred to as GTP-C), and C represents control panel; Between S-GW and base station, be connected by interface, this interface is based on GTP-U, and U represents user's face.
Packet data gateway (Packet Data Network Gateway, referred to as PDN GW or P-GW).Packet data gateway is responsible for the gateway function of UE accessing group data network (Packet Data Network, referred to as PDN), is user assignment User IP (Internet Protocol) address.PDN GW is in setting up carrying Bearer, determine the qos parameter of this carrying correspondence, comprise service quality class indication (QoS Class Identifier, referred to as QCI), AARP (Address Resolution Protocol, referred to as ARP) and accumulation maximum rate (Maximum Bit Rate, referred to as MBR), polymerization maximum rate (Aggregate Maximum Bit Rate, referred to as AMBR) etc., and issue S-GW and MME.In correlation technique, PDN GW and Serving GW may close and be located in a physical entity.Between P-GW and S-GW, be connected by S5/S8 interface.S5 and S8 interface have user's face also to have chain of command, and S5/S8 interface is based on GTP or proxy mobile IPv 6 agreement (Proxy Mobile Internet Protocol version6, referred to as PMIPv6).
Policy control and charging rule functions logic entity (Policy and Charging Rules Function, referred to as PCRF) are mainly responsible for determining formulation and the control of the dynamic qos policy of carrying and charging policy.In the time that user sets up carrying, PCRF sends to P-GW by QoS rule by Gx interface and carries out.
In wireless communication system, Radio Resource is limited, initiates traffic carrying capacity a lot of time when residing in the user of certain community, is very easy to cause user's face of this community congested.Base station user's face is congested have below three kinds may: 1) community idle wireless resource congested 2) base station disposal ability congested 3) base station is to the link congestion between S-GW.
Fig. 2 is the flow chart that solves the congested processing method of user's face in correlation technique, as shown in Figure 2, the main thought of the method is that P-GW increases a priority instruction at GTP-U data packet head, in the time that base station generation community user face is congested, corresponding packet need to be processed according to this priority in base station, thereby it is congested to alleviate user's face.The key step of the method is as follows:
Step S202, strategy is sent to P-GW by PCRF, can select the downlink data packet of application-specific that priority is set according to this strategy P-GW.In general P-GW only arranges priority for the different application packet on default bearer (QCI=8 or QCI=9), does not arrange for dedicated bearer.For same application, different user may have different priority, thereby can embody signing difference.P-GW also can be suitable in this locality configuration all users' general priority Provisioning Policy.
Step S204, in the time that P-GW receives downlink data packet, P-GW detects the application message of knowing this data message by deep message, according to from above-mentioned strategy, will in the GTP-U of downlink data message head, corresponding priority be set.
Step S206, P-GW by the GTP-U packet with priority by S5 S8 user's face send to S-GW.
Step S208, the GTP-U of packet is changed to S1GTP-U head first watch by S-GW, if S5 receive priority on S8 interface, on S1GTP-U head, same-priority is set.
Step S210, after S1GTP-U packet is received in base station, first dispatch according to the carrying QCI at this packet place, if comprised priority indication information in the packet header of packet, base station also needs to consider the priority instruction of packet, if that user's face has occurred is congested such as base station judgement, be preferably the allocation of packets resource of high priority instruction.Terminal is eated dishes without rice or wine to send to by packet process in base station.
By said method, different processed can be carried out to the each packet on default bearer in base station, and can limiting some application, to take wireless bandwidth excessive, thereby it is congested to alleviate Radio Resource.But said method is for base station, has also increased the processing to priority instruction, can further worsen the disposal ability of base station, and said method also cannot be alleviated the link congestion between base station and S-GW.
Therefore, in correlation technique, in the time that base station user's face is congested, still exist base station disposal ability congested, and base station is to the link congestion problem between S-GW.
Summary of the invention
The invention provides a kind of user's face congestion processing method, device and gateway, at least to solve in correlation technique in the time that base station user's face is congested, still exist base station disposal ability congested, and base station is to the link congestion problem between S-GW.
According to an aspect of the present invention, provide a kind of user's face congestion processing method, having comprised: received base station the congested congestion information of user's face occurs; According to the priority of the packet issuing to described base station, described packet is carried out to buffer memory; Issue the described packet of buffer memory according to described priority.
Preferably, according to the described priority of the described packet issuing to described base station, described packet is carried out to buffer memory and comprise: according to the difference of the described priority of described packet, different queues is set; According to the queue that described priority is corresponding, described packet is carried out to buffer memory.
Preferably, the described packet that issues buffer memory according to described priority comprises: according to the difference of described priority, be set the time interval that issues described packet to described base station; Issue the described packet of buffer memory according to the described time interval.
Preferably, one of at least receive in the following manner described base station the congested described congestion information of user's face occurs: receive described base station by chain of command the congested described congestion information of user's face occurs; Receive described base station by user's face the congested described congestion information of user's face occurs; Receive described base station from Network Information Gathering unit the congested described congestion information of user's face occurs.
Preferably, receiving the congested described congestion information of described base station generation user's face by described chain of command comprises: receive the described congestion information that mobile management entity sends by chain of command message, wherein, described congestion information carries the user ID that the user in the congested Xia community, described base station of user's face occurs; And/or, receive the described congestion information that mobile management entity sends by chain of command message, wherein, described congestion information carries the Base Station Identification that the congested described base station of user's face occurs.
Preferably, according to the described priority of the described packet issuing to described base station, before described packet is carried out to buffer memory, also comprise: receive the described packet issuing to described base station; One of at least judge whether to carry out buffer memory to described packet in the following manner, for be in the situation that, described packet is carried out to buffer memory: whether the destination address that judges described packet is overload base station in judged result; Judge whether user that described packet is corresponding is positioned at the community of the described base station congested in user's face.
According to a further aspect in the invention, also provide a kind of user's face congested processing unit, having comprised: the first receiver module, for receiving base station, the congested congestion information of user's face has occurred; Cache module, for according to the priority of the packet issuing to described base station, carries out buffer memory to described packet; Issue module, for issue the described packet of buffer memory according to described priority.
Preferably, described cache module comprises: the first setting unit, for according to the difference of the described priority of described packet, arranges different queues; Buffer unit, for according to described priority corresponding queue described packet is carried out to buffer memory.
Preferably, described in, issuing module comprises: the second setting unit, for according to the difference of described priority, arranges the time interval that issues described packet to described base station; Issue unit, for issue the described packet of buffer memory according to the described time interval.
Preferably, described the first receiver module comprise following one of at least:, there is the congested described congestion information of user's face for receive described base station by chain of command in the first receiving element; , there is the congested described congestion information of user's face for receive described base station by user's face in the second receiving element; , there is the congested described congestion information of user's face for receive described base station from Network Information Gathering unit in the 3rd receiving element.
Preferably, described the first receiving element comprises: first receives subelement, for receiving the described congestion information that mobile management entity sends by chain of command message, wherein, described congestion information carries the user ID that the user in the congested Xia community, described base station of user's face occurs; And/or second receives subelement, the described congestion information sending by chain of command message for receiving mobile management entity, wherein, described congestion information carries the Base Station Identification that the congested described base station of user's face occurs.
Preferably, this device also comprises: the second receiver module, for receiving the described packet issuing to described base station; Judge module, for one of at least judging whether to carry out buffer memory to described packet in the following manner, for be in the situation that, carries out buffer memory to described packet: whether the destination address that judges described packet is overload base station in judged result; Judge whether user that described packet is corresponding is positioned at the community of the described base station congested in user's face.
According to another aspect of the invention, provide a kind of gateway S-GW, comprised the device described in above-mentioned any one.
By the present invention, adopt and receive the congested congestion information of base station generation user's face; According to the priority of the packet issuing to described base station, described packet is carried out to buffer memory; Issue the described packet of buffer memory according to described priority, solve in correlation technique in the time that base station user's face is congested, still exist base station disposal ability congested, and base station is to the link congestion problem between S-GW, and then reach at base station user's face and occurred when congested, send the speed of packet to base station by reducing S-GW, not only effectively solve cell null mouth Radio Resource congested, base station is not increased to extra processing yet, and link between base station and S-GW also obtains the effect of effectively alleviating.
Brief description of the drawings
Accompanying drawing described herein is used to provide a further understanding of the present invention, forms the application's a part, and schematic description and description of the present invention is used for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is the schematic diagram of wireless communication system in correlation technique;
Fig. 2 is the flow chart that solves the congested processing method of user's face in correlation technique;
Fig. 3 is according to the flow chart of user's face congestion processing method of the embodiment of the present invention;
Fig. 4 is according to the structured flowchart of the congested processing unit of user's face of the embodiment of the present invention;
Fig. 5 is according to the preferred structure block diagram of cache module 44 in the congested processing unit of user's face of the embodiment of the present invention;
Fig. 6 is according to the preferred structure block diagram that issues module 46 in the congested processing unit of user's face of the embodiment of the present invention;
Fig. 7 is according to the preferred structure block diagram of the first receiver module 42 in the congested processing unit of user's face of the embodiment of the present invention;
Fig. 8 is according to the preferred structure block diagram of the first receiving element 72 in the first receiver module 42 in the congested processing unit of user's face of the embodiment of the present invention;
Fig. 9 is according to the preferred structure block diagram of the congested processing unit of user's face of the embodiment of the present invention;
Figure 10 is the gateway according to the embodiment of the present invention;
Figure 11 is the flow chart of user's face congestion processing method according to the preferred embodiment of the invention;
Figure 12 knows that by chain of command the flow chart of the congested method of user's face occurs in base station according to the S-GW of the embodiment of the present invention;
Figure 13 knows that by user's face the flow chart of the congested method of user's face occurs in base station according to the S-GW of the embodiment of the present invention;
Figure 14 knows that by Network Information Gathering unit the flow chart of the congested method of user's face occurs in base station according to the S-GW of the embodiment of the present invention;
Figure 15 is according to the flow chart that the processing of queue overflow occurs in the S-GW of the embodiment of the present invention;
Figure 16 is according to the structural representation of a kind of S-GW equipment of the embodiment of the present invention.
Embodiment
Hereinafter also describe the present invention in detail with reference to accompanying drawing in conjunction with the embodiments.It should be noted that, in the situation that not conflicting, the feature in embodiment and embodiment in the application can combine mutually.
A kind of user's face congestion processing method is provided in the present embodiment, and Fig. 3 is that as shown in Figure 3, this flow process comprises the steps: according to the flow chart of user's face congestion processing method of the embodiment of the present invention
Step S302, receives base station the congested congestion information of user's face occurs;
Step S304, according to the priority of the packet issuing to base station, carries out buffer memory to this packet;
Step S306, issues the packet of buffer memory according to priority.
Pass through above-mentioned steps, the packet issuing by subtend base station carries out buffer memory, with respect in correlation technique being the congested problem of solution base station user's face, only adopt at base station place and according to priority, packet is processed, not only increase the processing load of base station, and cannot effectively solve the congestion problems of link between S-GW and base station, and occur when congested at base station user's face, adopt and according to priority, packet was carried out to buffer memory before issuing packet to base station, not only effectively reduce the speed that issues packet to base station, effectively alleviate the problem of link congestion between S-GW and base station, and base station does not need the packet to receiving to carry out priority judgement yet, can effectively reduce the processing load of base station, base station user's face congestion problems is effectively solved.
According to the priority of the packet issuing to base station, when packet is carried out to buffer memory, can adopt various ways, more preferably can adopt the form of queue to carry out buffer memory, first, according to the difference of the priority of packet, different queues is set; Then according to priority, corresponding queue is carried out buffer memory to packet.Adopt the form of queue to carry out buffer memory to packet, not only simple to operate, and also directly perceived.Can certainly adopt other cache way, for example, can also, according to the priority of packet, packet be numbered, carry out buffer memory according to the sequencing of numbering.
Also can adopt various ways at the packet that issues buffer memory according to priority, for example, can, according to the difference of priority, be set the time interval that issues packet to base station; Issue the packet of buffer memory according to the time interval, such as, in the situation that can guaranteeing effective alleviate congestion, the transmission time interval that the packet that priority is high arranges is shorter, and the transmitting time that the low packet of priority arranges is longer, by such processing, the effectively problem of alleviate congestion, and also can effectively distinguish the packet of different priorities.
Receive base station there is user's face congested mode also can be multiple, for example, can be in the following manner one of at least receive base station the congested congestion information of user's face occur: receive base station by chain of command the congested congestion information of user's face occurs; Receive base station by user's face the congested congestion information of user's face occurs; Receive base station from Network Information Gathering unit the congested congestion information of user's face occurs.Preferably, in the time receiving base station by chain of command the congested congestion information of user face occur, also can there be two kinds of modes, for example, receive this congestion information that mobile management entity sends by chain of command message, wherein, this congestion information carries the user ID that the user in the congested Xia community, base station of user's face occurs; And/or, receive the congestion information that mobile management entity sends by chain of command message, wherein, this congestion information carries the Base Station Identification that the congested base station of user's face occurs.
In order to determine that the destination address that issues packet is really for the congested base station of user's face occurs, according to the priority of the packet issuing to base station, before packet is carried out to buffer memory, can once judge the packet receiving, first receive the packet issuing to base station; Judge whether to carry out buffer memory to packet, wherein, the mode of judgement can be multiple, for example, can judge whether the destination address of packet is overload base station; Judge whether user that packet is corresponding is positioned at the community of the base station congested in user's face,, determine need to carry out buffer memory to packet time packet is carried out to buffer memory for be in the situation that in judged result.
Also provide in the present embodiment a kind of user's face congested processing unit, this device is used for realizing above-described embodiment and preferred implementation, has carried out repeating no more of explanation.As used below, the combination of software and/or the hardware of predetermined function can be realized in term " module ".Although the described device of following examples is preferably realized with software, hardware, or the realization of the combination of software and hardware also may and be conceived.
Fig. 4 is according to the structured flowchart of the congested processing unit of user's face of the embodiment of the present invention, and as shown in Figure 4, this device comprises the first receiver module 42, cache module 44 and issues module 46, below this device described.
, there is the congested congestion information of user's face for receiving base station in the first receiver module 42; Cache module 44, is connected to above-mentioned the first receiver module 42, for according to the priority of the packet issuing to base station, packet is carried out to buffer memory; Issue module 46, be connected to above-mentioned cache module 44, for issue the packet of buffer memory according to priority.
Fig. 5 is that as shown in Figure 5, this cache module 44 comprises the first setting unit 52 and buffer unit 54, below this cache module 44 is described according to the preferred structure block diagram of cache module 44 in the congested processing unit of user's face of the embodiment of the present invention.
The first setting unit 52, for according to the difference of the priority of packet, arranges different queues; Buffer unit 54, is connected to above-mentioned the first setting unit 52, for according to priority corresponding queue packet is carried out to buffer memory.
Fig. 6 is according to the preferred structure block diagram that issues module 46 in the congested processing unit of user's face of the embodiment of the present invention, and as shown in Figure 6, this issues module 46 and comprises the second setting unit 62 and issue unit 64, below this is issued module 46 and is described.
The second setting unit 62, for according to the difference of priority, arranges the time interval that issues packet to base station; Issue unit 64, be connected to above-mentioned the second setting unit 62, for issue the packet of buffer memory according to the time interval.
Fig. 7 is according to the preferred structure block diagram of the first receiver module 42 in the congested processing unit of user's face of the embodiment of the present invention, as shown in Figure 7, this first receiver module 42 comprise following one of at least: the first receiving element 72, the second receiving element 74, the 3rd receiving element 76, describe this first receiver module 42 below.
, there is the congested congestion information of user's face for receive base station by chain of command in the first receiving element 72; , there is the congested congestion information of user's face for receive base station by user's face in the second receiving element 74; , there is the congested congestion information of user's face for receive base station from Network Information Gathering unit in the 3rd receiving element 76.
Fig. 8 is according to the preferred structure block diagram of the first receiving element 72 in the first receiver module 42 in the congested processing unit of user's face of the embodiment of the present invention, as shown in Figure 8, this first receiving element 72 comprises that the first reception subelement 82 and/or second receives subelement 84, describes this first receiving element 72 below.
First receives subelement 82, the congestion information sending by chain of command message for receiving mobile management entity, and wherein, this congestion information carries the user ID that the user in the congested Xia community, base station of user's face occurs; And/or second receives subelement 84, the congestion information sending by chain of command message for receiving mobile management entity, wherein, this congestion information carries the Base Station Identification that the congested base station of user's face occurs.
Fig. 9 is according to the preferred structure block diagram of the congested processing unit of user's face of the embodiment of the present invention, and as shown in Figure 9, this structure, except comprising all modules shown in Fig. 4, also comprises the second receiver module 92 and judge module 94, below this preferred structure is described.
The second receiver module 92, is connected to above-mentioned the first receiver module 42, for receiving the packet issuing to base station; Judge module 94, be connected to above-mentioned the second receiver module 92 and cache module 44, for one of at least judging whether to carry out buffer memory to packet in the following manner, for be in the situation that, packet is carried out to buffer memory: whether the destination address that judges packet is overload base station in judged result; Judge whether user that packet is corresponding is positioned at the community of the base station congested in user's face.
Figure 10 is the gateway according to the embodiment of the present invention, and as shown in figure 10, this gateway 100 comprises the congested processing unit 102 of the user's face described in above-mentioned any one.
In the present embodiment by S-GW or SGSN, packet being processed, above-mentionedly in the time that base station user's face is congested, still exist base station disposal ability congested thereby can effectively solve, and base station is to the link congestion problem between S-GW.User's face congestion processing method of providing in the present embodiment mainly comprises that following processing: S-GW arranges multiple queues with different priorities for the base station of each access; Congested when the community of base station generation user face, this congestion information is notified to S-GW; S-GW receives that destination address is after the downlink data packet of congested base station, according to the priority of data packet head, packet delivery is carried out to buffer memory to the queue of corresponding priority, thereby reduces the speed that sends packet to base station.It should be noted that, S-GW, in sending downlink data to base station, can remove the priority in GTP-U message header.In addition, cause packet loss if there is queue full, S-GW returns to wrong instruction to P-GW, and packet loss occurs in instruction, and reason is that user's face is congested, and P-GW may initiate bearing modification process.
S-GW knows that congested mode occurs base station user's face can be multiple, and for example, base station user's face occurs congested, notice MME, and MME reinforms S-GW; It is congested that base station also can directly notify S-GW that user's face occurs by user plane messages; It is congested to there is user's face by Network Information Gathering unit notice S-GW in base station.
Below in conjunction with accompanying drawing, the preferred embodiment of the present invention is described.
Figure 11 is the flow chart of user's face congestion processing method according to the preferred embodiment of the invention, and as shown in figure 11, this flow process comprises the steps:
Step S1102, S-GW, for each connected base station, arranges multiple queues with different priorities; This queue is for the S1-U interface to base station at S-GW.
Step S1104, qos policy is sent to P-GW by PCRF, and this strategy is which QCI that comprises this user enables this priority flag, and the corresponding relation of application and priority.In general P-GW only arranges priority for the different application packet on default bearer (QCI=8 or QCI=9), does not arrange for dedicated bearer.For same application, different user may have different priority, thereby can embody signing difference.P-GW also can be suitable in this locality configuration all users' general priority Provisioning Policy.
Step S1106, in the time that P-GW receives downlink data packet, P-GW detects the application message of knowing this data message by deep message, according to the strategy obtaining from PCRF, if need, will in the S5/S8GTP-U of this data message head, corresponding priority be set.
Step S1108, P-GW by GTP-U Packet Generation to S-GW.
Step S1110, after S-GW receives the downlink data packet literary composition sending from P-GW, S-GW is revised as the data packet head of GTP-U the GTP-U data packet head of S1-U interface, then packet is forwarded to base station by S1-U interface.S-GW does not arrange the priority instruction of packet.
Step S1112, QoS control is carried out according to the corresponding QCI of this carrying in base station, and packet is sent to terminal by air interface.
Step S1114, base station detects that wireless area user's face is congested, such as, Radio Resource not, base station disposal ability is inadequate or base station is congested to the link generation between S-GW, that user's face has occurred is congested for base station notice S-GW, and notice concrete grammar adopts in above-described embodiment and preferred implementation illustrated.
Step S1116, after S-GW receives the downlink data packet literary composition sending from P-GW, S-GW is revised as the data packet head of GTP-U the GTP-U data packet head of S1-U interface, judge whether to need buffer memory, if needed, so give the indicated priority of data packet head of coming according to P-GW, this packet delivery carried out to buffer memory to the queue with different priorities; If downlink data packet is not indicated priority, S-GW is distributed to default queue and processes.S-GW does above-mentionedly judge whether to be overload base station according to destination address, or judges whether it is specific user, within this user is positioned at congested community.
Step S1118, according to the different priorities arranging, the packet of buffer memory is issued to base station by S-GW.The example of execution mode is: in S-GW, have two queues, queue 1 is high priority, and queue 2 is low priority.For the data in queue 1, issue a packet every T1, for the data in queue 2, issue a packet every T2, T2>T1 is set here.
Step S1120, QoS control is carried out according to the corresponding QCI of this carrying in base station, and packet is sent to terminal by air interface.
By introducing priority query at S-GW, can reduce the speed of S-GW to base station transmission downlink data packet, thereby user's face of alleviation base station is congested; For base station, still carry out QoS processing according to original QCI, do not introduce any extra user's face processing, therefore can not cause user's face more congested; This mechanism equally also can effectively be alleviated the link congestion between base station and S-GW by data cached bag.Therefore can effectively solve in correlation technique, mention 3 kinds may: 1) community idle wireless resource congested 2) base station disposal ability congested 3) base station is to the link congestion between S-GW.
Figure 12 knows that by chain of command the flow chart of the congested method of user's face occurs in base station according to the S-GW of the embodiment of the present invention, and as shown in figure 12, this flow process comprises the steps:
Step S1202, it is congested that base station judges that certain community is about to that user's face occurs, then send user's face overload notice to MME, with the mark of described community.
Subsequent step has two kinds of implementations, and mode one is as follows:
Step S1204a, MME, according to this cell ID, finds all users under this community, and above-mentioned congestion information is notified to S-GW by chain of command message by user.
Step S1206a, S-GW starts queue mechanism for above-mentioned user: the buffer queue that downlink data packet is distributed to corresponding priority.
Mode two is as follows:
Step S1204b, MME sends overload message by chain of command to S-GW, in this message, includes Base Station Identification.
Step S1206b, S-GW enables queue mechanism for this base station: all downlink data packet that are this base station by destination address, are distributed to the buffer queue of corresponding priority.
Mode one is than mode two, and S-GW can accurately control to the user under overload community, but has also increased the process useful under this community of searching of MME simultaneously, and has increased the signaling traffic load to S-GW.
Figure 13 knows that by user's face the flow chart of the congested method of user's face occurs in base station according to the S-GW of the embodiment of the present invention, and as shown in figure 13, this flow process comprises the steps:
Step S1302, it is congested by there is user's face that community is sentenced in base station, so send user plane messages, the overload of informing base station user face to S-GW.Base station obtains all carryings of the user who resides in this community, and then each carrying sends a notification message, this notification message or be placed in the GTP-U message header of packet, or be placed on IP data packet head the inside, outside, bring S-GW.
Step S1304, after S-GW receives, knows that user's face has occurred in this base station congested, so start user's caching mechanism: the buffer queue that the downlink data packet of carrying is distributed to corresponding priority.
Figure 14 knows that by Network Information Gathering unit the flow chart of the congested method of user's face occurs in base station according to the S-GW of the embodiment of the present invention, as shown in figure 14.In network, set up a Network Information Gathering unit, collect specially some information in mobile network.
Step S1402, it is congested, congested to this network information unit report of user face that base station judgement is about to that user's face occurs.
Step S1404, it is congested that S-GW knows from network information unit whether the base station of current access user's face has occurred
Step S1406, if congested, by the queue mechanism of enabling of respective base station: all downlink data packet that are this base station by destination address, are distributed to the buffer queue of corresponding priority.
Alleviate if base station user's face is congested, base station can be by similar method notice S-GW.S-GW does not enable above-mentioned queue mechanism, directly data distributing is arrived to respective base station.
Figure 15 is according to the flow chart that the processing of queue overflow occurs in the S-GW of the embodiment of the present invention, and as shown in figure 15, this flow process comprises the steps:
Step S1502, S-GW is in data cached, very fast if data arrive, and will cause queue to be overflowed.
Step S1504, S-GW, according to the principle of first in first out, abandons and overflows the packet arriving first in queue.
Step S1506, S-GW abandons to P-GW report data, and S-GW to P-GW, carries out charging adjustment by the data packet number timed sending of losing.This message can send by chain of command message, also can send by user plane messages.
Step S1508, P-GW may be mutual with PCRF, initiates bearing modification process, reduces the speed of carrying, thereby control downlink bearing.
Figure 16 is according to the structural representation of a kind of S-GW equipment of the embodiment of the present invention, and as shown in figure 16, this S-GW equipment comprises following structure:
Chain of command processing module 162: be mainly responsible for the chain of command processing of S-GW, treatment S-GW is to the GTP-C message of MME and arrive the GTP-C message of P-GW;
User's face processing module 164: be connected to above-mentioned chain of command processing module 162, main user's face processing of being responsible for S-GW, groundwork is for downlink data packet, descending GTP-U data packet head on S5/S8 interface is replaced with to the descending GTP-U packet packet header of S1 interface, for upstream data, the up GTP-U data packet head on S1 interface is replaced with to the up GTP-U packet packet header of S5/S8 interface.For downlink data packet, this module no longer arranges the priority of packet.
Base station user's face congestion detection module 166(function is with above-mentioned the first receiver module 42 and/or judge module 94): this module is newly-increased module, be connected to above-mentioned chain of command processing module 162 and user's face processing module 164, it is congested that S-GW knows from control panel processing module or user's face processing module whether base station user's face occurs, and if it is enables buffer queue module.
Buffer queue module 168(function is with above-mentioned cache module 44): this module is newly-increased module, is connected to above-mentioned base station user's face congestion detection module 166 and user's face processing module 164, is positioned on the S1 interface of S-GW.This module is provided with the queue of different priorities for each base station, if it is congested that base station user's face congestion detection module 166 detects that user's face has occurred in the community of base station, so S-GW is the specified carrying of the specified user of base station or MME or base station according to destination address, call this buffer queue module 168: downlink data packet is distributed to corresponding queue according to the set priority of P-GW and carries out buffer memory, and issue packet according to corresponding priority.Preferred embodiment: in buffer queue module, have two queues, queue 1 is high priority, and queue 2 is low priority.For the data in queue 1, issue a packet every T1, for the data in queue 2, issue a packet every T2, T2>T1 is set here.
It should be noted that, above-described embodiment and preferred implementation, for 4G system, are easy to be generalized to 3G system.For example, SGSN has chain of command and user's face, and relevant priority query can be set in SGSN.After GGSN arranges the priority of packet, if SGSN finds that user's face has occurred is congested in base station cell, SGSN can carry out corresponding caching process to downlink data packet, thereby it is congested also can effectively to alleviate user's face of base station cell.
Obviously, those skilled in the art should be understood that, above-mentioned of the present invention each module or each step can realize with general calculation element, they can concentrate on single calculation element, or be distributed on the network that multiple calculation elements form, alternatively, they can be realized with the executable program code of calculation element, thereby, they can be stored in storage device and be carried out by calculation element, and in some cases, can carry out shown or described step with the order being different from herein, or they are made into respectively to each integrated circuit modules, or the multiple modules in them or step are made into single integrated circuit module to be realized.Like this, the present invention is not restricted to any specific hardware and software combination.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (13)
1. user's face congestion processing method, is characterized in that, comprising:
Receive base station the congested congestion information of user's face occurs;
According to the priority of the packet issuing to described base station, described packet is carried out to buffer memory;
Issue the described packet of buffer memory according to described priority.
2. method according to claim 1, is characterized in that, according to the described priority of the described packet issuing to described base station, described packet is carried out to buffer memory and comprise:
According to the difference of the described priority of described packet, different queues is set;
According to the queue that described priority is corresponding, described packet is carried out to buffer memory.
3. method according to claim 1, is characterized in that, the described packet that issues buffer memory according to described priority comprises:
According to the difference of described priority, be set the time interval that issues described packet to described base station;
Issue the described packet of buffer memory according to the described time interval.
4. method according to claim 1, is characterized in that, one of at least receives in the following manner described base station the congested described congestion information of user's face occurs:
Receive described base station by chain of command the congested described congestion information of user's face occurs;
Receive described base station by user's face the congested described congestion information of user's face occurs;
Receive described base station from Network Information Gathering unit the congested described congestion information of user's face occurs.
5. method according to claim 4, is characterized in that, receives the congested described congestion information of described base station generation user's face comprise by described chain of command:
Receive the described congestion information that mobile management entity sends by chain of command message, wherein, described congestion information carries the user ID that the user in the congested Xia community, described base station of user's face occurs; And/or,
Receive the described congestion information that mobile management entity sends by chain of command message, wherein, described congestion information carries the Base Station Identification that the congested described base station of user's face occurs.
6. according to the method described in any one in claim 1 to 5, it is characterized in that, according to the described priority of the described packet issuing to described base station, before described packet is carried out to buffer memory, also comprise:
Receive the described packet issuing to described base station;
One of at least judge whether to carry out buffer memory to described packet in the following manner, for be in the situation that, described packet is carried out to buffer memory: whether the destination address that judges described packet is overload base station in judged result; Judge whether user that described packet is corresponding is positioned at the community of the described base station congested in user's face.
7. the congested processing unit of user's face, is characterized in that, comprising:
, there is the congested congestion information of user's face for receiving base station in the first receiver module;
Cache module, for according to the priority of the packet issuing to described base station, carries out buffer memory to described packet;
Issue module, for issue the described packet of buffer memory according to described priority.
8. device according to claim 7, is characterized in that, described cache module comprises:
The first setting unit, for according to the difference of the described priority of described packet, arranges different queues;
Buffer unit, for according to described priority corresponding queue described packet is carried out to buffer memory.
9. device according to claim 7, is characterized in that, described in issue module and comprise:
The second setting unit, for according to the difference of described priority, arranges the time interval that issues described packet to described base station;
Issue unit, for issue the described packet of buffer memory according to the described time interval.
10. device according to claim 7, is characterized in that, described the first receiver module comprise following one of at least:
, there is the congested described congestion information of user's face for receive described base station by chain of command in the first receiving element;
, there is the congested described congestion information of user's face for receive described base station by user's face in the second receiving element;
, there is the congested described congestion information of user's face for receive described base station from Network Information Gathering unit in the 3rd receiving element.
11. devices according to claim 10, is characterized in that, described the first receiving element comprises:
First receives subelement, the described congestion information sending by chain of command message for receiving mobile management entity, and wherein, described congestion information carries the user ID that the user in the congested Xia community, described base station of user's face occurs; And/or,
Second receives subelement, the described congestion information sending by chain of command message for receiving mobile management entity, and wherein, described congestion information carries the Base Station Identification that the congested described base station of user's face occurs.
12. according to the device described in any one in claim 7 to 11, it is characterized in that, also comprises:
The second receiver module, for receiving the described packet issuing to described base station;
Judge module, for one of at least judging whether to carry out buffer memory to described packet in the following manner, for be in the situation that, carries out buffer memory to described packet: whether the destination address that judges described packet is overload base station in judged result; Judge whether user that described packet is corresponding is positioned at the community of the described base station congested in user's face.
13. 1 kinds of gateway S-GW, is characterized in that, comprise the device described in any one in claim 7 to 12.
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| CN201310142729.8A CN104125607A (en) | 2013-04-23 | 2013-04-23 | User plane congestion processing method and device, and service gateway |
| PCT/CN2014/074611 WO2014173225A1 (en) | 2013-04-23 | 2014-04-02 | User plane congestion handling method, device and serving gateway |
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