CN103503417B - Communication system - Google Patents

Abstract

Communication system (1) includes remote optimisation server (3) and center optimization server (5), and both are adaptively communicated by backhaul network (4).The center optimization server (5) communicates for data transfer with core network element (6,8,9).Server (3,5) provides the access to local data service device, manage backhaul link, data buffer storage is performed, and optimizes and needs the data transfer of backhaul, to be that transparent mode reduces data transfer by backhaul network for user and core network element.Server performs compression and protocol optimization.The remote optimisation server includes HTTP accelerator, and it optimizes function using client and server end and is associated with a branch of resource of the request for basic HTML to extract, and one group of all HTTP transmission of maintaining loading is continuously connected with.The HTTP accelerator has the broker architecture of separation, and function is distributed on the server at back haul link two ends wherein.

Description

Communication system

Technical field

The present invention relates to data communication, especially with image and/or video, and/or the data of audio pass through wide area network Communication.

Reference picture 1, in traditional mobile cellular data network, before its appearance is as " standard " IP transmission, comes from The data of user terminal pass through base station (for example, Node-B, eNode-B ...), followed by RNC, and encryption herein is terminated, afterwards Immediately following being SGSN and GGSN.

Mobile data network (such as 3G or 4G) is at an unprecedented rate grown up by the past several years.Currently have About 1,500,000 NodeBs (Node-B) are used in the whole world.This number, not including Femto cells, with annual general 300,000 Speed increases and its growth rate is expected to increase.

Demand for 3G capacity is driven by many factors, including：

- USB Modem；These equipment cause portable computer to may be coupled to internet and by 3G mobile networks Joint network.These modems are many or can not access WiFi, DSL or cable modem for those travellings It is popular for people.Operator usually introduces these equipment in the charge system of unified expense and common is exactly The price-list of " general " is designed for fixed Monthly Payment.

- the bandwidth that there is the senior mobile phone of network browsing instrument to expend is many times of conventional mobile phone.These 3G networks The increase of equipment result in the increase of 200% to 300% capacity requirement.

Due to looking to coming using many smaller cells the demand of processing capacity in conventional cellular systems operator.Now, Many operators dispose Femto cells on a large scale very much in consumer's family and office.

It is used as the increased direct result of 3G network capacity in terms of station number and site capacity, the backhaul of these websites Capacity requirement is also increased with similar percentage.But a traditional grand NodeB assumes that two E1 of original use are connected to Sound and short message (2 × 2MBit/S), now, identical website then often need 6 to 8 such E1 chains of configuration to fetch processing volume Exterior capacity.It is the basis according to every Mbit/s monthly because in most cases operator hires out its backhaul capacity, therefore most The cost of smallization backhaul is exactly high priority.

Another technology is exactly to introduce Femto cells in a network.Femto cells be it is very small in 3G Node-B forms, Low capacity (4 to 16 users are simultaneously), low cost (being less than $ 100).These Femto cells are typically deployed in consumer family Or office, and typically connect back to core net using existing DSL lines.In other words cellular carrier just uses user oneself DSL lines be used as backhaul.Fairly good, the increase and ISP oppositions yet with 3G data throughouts of academicly this method operation Cellular carrier " free " uses their architecture so that finally needing optimization/reduction bandwidth.Femto Quarter Designs it is another One interesting aspect is exactly that it includes RNC elements, and thus all elements of wireless access network are contained in a unit.

Present invention seek to address that above mentioned problem.

The content of the invention

According to the present invention there is provided a kind of communication system, including：

Remote optimisation server, it is applied to and base station communication,

Center optimization server, it is applied to communicate with the remote optimisation server by backhaul network, and and core Heart mesh element communicates for data transfer, and

Wherein described remote optimisation server and the center optimization server are applied to：There is provided to local data service device Access, management performs data buffer storage, and the number that optimization is transmitted by the backhaul network by the communication of the backhaul network According to transmission, so as to be that transparent mode reduces data transfer by the backhaul network to user and core network element.

In one embodiment, the remote optimisation server and the center optimization server are applied to：With to user It is that transparent mode reduces data transfer by the backhaul network with the core network element.

In one embodiment, the center optimization server is applied to be connected with the core network element for prison Depending on, customer service, book keeping operation and safety.

In one embodiment, the center optimization server is applied to：Simulation base station controller is towards other core nets The interface of element.

Preferably, the center optimization server is adapted for carrying out compression.

In one embodiment, the center optimization server is adapted for carrying out protocol optimization.

In one embodiment, the remote optimisation server is applied to realize RNC, SGSN and GGSN work(in remote site One subset of energy, to show unencapsulated and unencryption user's IP operation in the remote site so that the IP operation can be managed And optimize.

In one embodiment, the remote optimisation server is adapted for carrying out the direct IP visits to local datastore Ask, enabling carry out local data access in base station site and for backhaul communication standard and enhanced IP can be used excellent Change technology.

Preferably, the remote optimisation server includes：Business grader, user data optimization functional unit and backhaul chain Road manager.In one embodiment, the back haul link manager is applied to access local datastore.

In one embodiment, the center optimization server includes：Back haul link manager, user data optimization function Unit and Protocol Relay functional unit.Preferably, the business grader of the remote optimisation server is applied to, and performs business inspection Look into, and by the delineation of activities into different classes of, and before the back haul link manager is submitted to described in mark not It is generic.

In one embodiment, the remote optimisation server is applied to prevent the business of particular category from entering in special time Row backhaul communication.In one embodiment, the back haul link manager is applied to according to class of service dynamic select carrier.It is excellent Selection of land, the selection is according to service quality standard and user equipment progress.

In one embodiment, the server is applied to：Service optimization is performed, it includes caching and preextraction, described Cache for ensuring to download the object changed in the only page by backhaul；Perform transimiison analysis, with determine between non-peak period will under The data of load, data compression；Perform the compression algorithm for header and payload；And perform header-compressed.

In one embodiment, the remote optimisation server includes HTTP accelerator, and it uses client and server End optimizes function to extract a branch of resource associated with the request to basic HTML.

In another embodiment, the HTTP accelerator is continuously connected with suitable for safeguarding one group, is held by described one group Continuous connection is transmitted to carry all HTTP.Preferably, the HTTP accelerator has the broker architecture of separation, in the separation In broker architecture, function is distributed on the server at back haul link two ends.In one embodiment, remote agent is as running on The HTTP Proxy of browser on the user equipment of remote site and occur, and central agency be used as Web server typical case Web client.

In one embodiment, the optimization server is applied to be based on：Which object in the visual field of user, it is described right Order, object type, the prioritization of access group of user of object described in the size of elephant, browse request, and perform optimization.It is preferred that Ground, IP operation is directly related to cellular-specific user identifier.

In one embodiment, the optimization server is adapted for carrying out the following steps to serve HTTP Web pages Request：When needing the basic page in client, initial GET request is sent by browser for the page；Remote agent is cut Take the GET request and forward URL to central agency；The central agency obtains associated with the URL from Web server The basic page, and the basic page is passed into scheduler and compression engine that the center optimizes server, the scheduling Device and compression engine dispatch the basic HTML with by being continuously connected with being transferred to the remote site；The central agency parsing The basic HTML, and the related Web resource being embedded in the page is extracted immediately, compress and dispatch these resources to be transferred to The remote site；In remote port, the remote agent parses the basic HTML to determine which resource will be transmitted, then The basic HTML is transferred to the client by the remote agent；And when the client carry out it is follow-up to the phase Close resource request when, the remote agent determines whether the resource is currently transmitted first, if the resource by Transmission, then untill the request from the client is merely deferred until that the resource is arrived at；Otherwise, if this is to new basis The new request of the page, then the system performs above-mentioned steps.

In one embodiment, the optimization server is applied to keep the transparency of the peering session of mobile device, together When reduce data service on back haul link, wherein the remote optimisation server includes long-range peer agent, the center is excellent Changing server includes central peer agent, wherein the long-range peer agent represents the reciprocity end of network of mobile client, it is described Central peer agent represents mobile client, and the agency for the mobile client and the reciprocity end of their network all It is transparent.

In another embodiment, it is described to act on behalf of all by data buffer storage in the symmetrical cache structure of a separation, described In the symmetrical cache structure of separation, pass through back haul link cache exchanging key between server.Preferably, server is applied to inspection The data that the server is sent to other servers are looked into, and dynamically change cached parameters, the cached parameters include：Queue Size or key schedule or block size or data cached holding strategy.In one embodiment, the center reciprocity generation Reason is applied to notify to the long-range peer agent：Identical or different long-range optimization service of the data asked in the system It is available in the aided remote peer agent of device.In one embodiment, the agency is adapted to monitor for mobile client Peer to peer connection and position.In one embodiment, the agency is applied to：Need it is a small amount of using backhaul network or without using returning In the case of journey network, monitored information is used to guide reciprocity number between reciprocity end on the same side of the backhaul network According to.In one embodiment, the agency is applied to the standard that modification selects reciprocity end when setting up and safeguarding peer to peer connection.

Preferably, the standard includes the appearance of position, the capacity of radio link quality or remote cell or back haul link Amount.

In one embodiment, the body acted on behalf of suitable for safeguarding client multiple block data protocol contexts Part.

In one embodiment, the server is adapted to monitor for the activation of packet data protocol PDP Context and deactivated It is living, carry out distribution marker to each context, and the identifier is shared with other servers.

In one embodiment, the remote optimisation server and the center optimization server are applied to：By described Core net extracts data, even if the data are without by backhaul chain by the remote optimisation server from caching transmission It is also such that road, which is transmitted,.

In one embodiment, the remote optimisation server is applied to：Only pass through the core in the data Net is drawn to after the center optimization server, just transmits the data.

In one embodiment, the remote optimisation server is applied to delay transmission until receiving from the center Untill optimizing after the permission of server.Preferably, the remote optimisation server is adapted to monitor for caching and used, and based on such as Fruit caching will be available using the then more backhaul capacities of height, correspondingly to determine the use of backhaul network.

In another embodiment, the remote optimisation server is applied to the monitoring dynamically modification service used according to caching Mass parameter, the caching uses the designator used as backhaul network.Preferably, the system includes multiple long-range optimizations Server.

In one embodiment, the remote optimisation server is suitable to propelling data to another remote optimisation server. In one embodiment, the remote optimisation server is using cluster architecture and shares identical back haul link.

In another aspect, the present invention provides a kind of computer program product, including software code, it is adaptable to perform as first The optimization server step of system described in preceding any embodiment.

Detailed description of the invention

The brief description of accompanying drawing

The present invention can be by some following embodiments and its reference only to the description given by the example of accompanying drawing come more clear Understand to Chu, it is as follows：

Fig. 1 is to illustrate above-mentioned, component drawings of typical mobile data network framework in the prior art；

Fig. 2 is the component drawings of the communication system architecture of the present invention；

Fig. 3 is the framework block diagram for illustrating remote optimisation server；With

Fig. 4 is the framework block diagram for illustrating center optimization server；

Fig. 5 is the figure for illustrating signal stream；With

Fig. 6 and 7 is the figure for illustrating optional center and remote optimisation server.

Embodiment

Reference picture 2, in remote site, communication system 1 includes base station 2 and remote optimisation server 3.It passes through backhaul network 4 with core net website element communication.The latter is center optimization server 5, MSC 6, SGSN 8 and GGSN 9.MSC 6 with PSTN 7 communicates and GGSN communicates with internet 10.

As shown in figure 3, remote optimisation server 3 includes business grader 20, user data optimization function 21 and backhaul chain Road manager 22.The latter and the link connection of local datastore 23.

Reference picture 4, center optimization server 5 is included in back haul link manager 30, user data optimization function 31, agreement After 33 and IMSI databases 34.

RNC functions include crypto endpoint, can be in the base station 2 or physical location is implemented in the hardware near base station 2.This changes The influence of change is just so that framework " more flat " and so may be such that optimisation technique implementation described below is more convenient.Secondly, (long-range and center) optimization server positioned at the either end of back haul link 4 is introduced into.

The main task of remote optimisation server 3 is exactly to access (such as local network website), difference for local data to return The management of journey link, data buffer storage and the optimization of data of backhaul is needed to provide support.

Center optimization server 5 is similar to the remote optimisation server 3 positioned at core net, the optimization for backhaul data. Center optimization server 5 is connected for charging, operational management, monitoring, customer service and safety with the element of core net.Its with Operated similar to the mode such as RNC that other (existing) core network elements are perceived.This is facilitated for these core network elements The integration of part.Center optimization server 5 goes back some in processing data optimization aspect, such as compression described below and agreement are excellent Change.

It is exactly one of in terms of the advantage of the frameworkImplement RNC, the subset of SGSN and GGSN functions in remote site.Its Remote site shows unencapsulated, unencryption customer service so that IP transmission can be managed and be optimized.

Similarly, the framework for becoming flat, which is realized, to be accessed the direct IP of local datastore；Such as enterprise Web website, sheet Ground video server, local education or health resources.This is realized in the local data access of base station site and in backhaul network Network 4 uses standard and enhanced IP optimisation techniques.

Remote optimisation server 3 performs business classification and service differentiation.(Deep Packet are detected using deep message Inspection different service types such as VoIP, game, video and VPN identification are realized in business detection).This allows business Be divided into different preferential species, then before backhaul network 4 is submitted to its by the angle from service quality (QoS) rightly Mark.If this also achieve it is necessary in the case of, specific unnecessary type of service such as VoIP identification and possible prevention.

The service differentiation of prioritised transmission allows different carriers to be used for the different types of transmission of backhaul.For example, urban district Node-B can be used high-quality El/Tl links to carry QoS standard transmissions such as sound or signaling, rather than standard data delivery (public internet) can be by more inexpensive link such as DSL by backhaul.Similarly, different QoS standard can be based on user's Cellular identity and qos parameter are employed.For example, HLR can include the cellular-specific qos parameter (IMSI) and this for being used for specific user A little HLR parameters can be used in remote site be used for distinguish to and from user transmission order of priority.

Similarly, remote optimisation server 3 performs other IP optimisation techniques and included：

- caching；Caching ensures the object only changed in the page by backhaul to download；

- extract in advance；Transimiison analysis determines the content of to be downloaded in the off-peak hours/broadcast；

- data compression；For header and the compression algorithm of payload；

- header-compressed.

System 1 performs the acceleration of http protocol, and this is particularly useful in the back haul link using high latency.

Referring back to Fig. 3, remote optimisation server 3 includes following functional module.Business grader 20, which is checked, comes from base station Packet and route the transmission and directly arrive back haul link manager 22 or to user data optimization module 21.Business grader 20 is also Other functions can be provided and for example prevent particular traffic type.User data optimization module 21 performs standard and enhanced IP data Optimisation technique round-trip user data.Back haul link manager 22 safeguards the long-range connection between central location and to using this Order of priority is distinguished in the transmission connected a bit.It can also in case of need route transmission to local datastore (web stand Point).

Reference picture 4, it is long-range between central location to safeguard that center optimization server 5 includes back haul link manager 30 Connect and to distinguishing order of priority using these transmission connected.User data optimization module 31 implements standard and enhanced IP Data optimization technique is used for backhaul user data.Protocol Relay module 33 has two major functions；It is used in backhaul Protocol conversion (relaying) for example point to the 3GPP Iu of core network element for standard agreement.It also coordinates be described below remote Business grader in Cheng Youhua servers 3 separates to manage user data from signaling.Also the latter's function is safeguarded and using use The database of the IMSI identifiers at family.

Internal GGSN terminates the transmission to and from SGSN and is additionally operable to tunnel management and the access of internet.

System 1 minimizes the amount of the user data transmitted by backhaul network 4.This can (LAN takes by local IP access Business device, data cached) enough data and have to reach by the user data of backhaul network 4 by optimization.So Doing only in existing network operation to have a little influences, or does not influence.The user data transmission is passed from other critical networks Separated in defeated such as signaling, the latter passes transparently through system, that is to say, that any compression of signalling be it is lossless and Transmission can be decompressed in the other end.

Mobile management transmission such as location updating, certification, switching, registration and network are depended on and for example can classified by business Device 20 recognizes and passes transparently through system.When Protocol Relay 33 detects the tunnel just set up for user data, it checks user IMSI and determine whether optimization can be applied to the data of specific user.Under specific circumstances, such as roaming service customer, due to it Need to transmit by the home network of user, it may not be needed to optimize data.

If it is affirmative that IMSI, which is checked, then Protocol Relay 33 sends the message comprising IMSI and tunnel identifier to remote The user data optimization module 21 of journey, indicates its user data tunnel for terminating in remote optimisation server 3.The user data is excellent Change module 21 to terminate tunnel and extract user data (IP transmission).IP transmission is optimised and is transmitted to back haul link manager 22。

User data optimizes mould by optimizing the reciprocity back haul link manager 30 and user data of server 5 in center Block 31 is sent.Based on configuration data, how the determination data of Protocol Relay 33 is should be by external routes.Possible situation include from User data optimization module 31 is routed directly to external network (such as internet), and inside is passed through from user data optimization module 31 GGSN 9 is routed to external network or is routed to external network by SGSN 8 and GGSN 9.The main advantage of first way exists In by less network element forwards it is more efficient, faster and use less resource.It is by the main advantages routeing of SGSN 8 Any existing taximeter or similar framework are not affected.

HTTP accelerator

HTTP (HTTP) is the agreement of a borderless issued transaction, and it manages Web client kimonos Content exchange between business device.HTTP is characterised by continuous operation, during the extraction of its delay embedding formula Web Internet resources Between.For example, when the client in end user device is proposed for the HTTP GET requests of the ad hoc networks page, Web server The basic html page of the reference comprising other the nested resources for asking user is replied to show the page to end subscriber.This A little resources are passed through the possible new TCP by client opening to the webserver by further continuous HTTP GET requests Connect to ask.By each individually operated long two-way time is postponed, the continuous operation of http protocol passes through such as satellite It is very bad that the high latency back haul link of link is performed.

Conventional Web browser does not assemble its GET request typically, alternatively, and it disposably asks the money needed for it Source.In order to overcome HTTP continuous operation, there are several known modes to be illustrated for the money from server one group of polymerization of extraction Source, it is commonly referred to as a branch of.These modes can be generally categorized as client and server end solution.System 1 includes HTTP Accelerator, it is extracted a branch of associated with request to basic HTML using the hybrid optimum technique at client and server end Resource.

In addition, the problem of having several transmission control protocols (TCP), it is attributed to the poor webpage by high latency back haul link Face load performance.Several it are relevant to connection for example, having and set up and the problem of slow turn-on.TCP three-way handshakes (SYN-SYN-ACK) quilt For setting up TCP connections and removing connection.For example, Web browser can be configured to open several TCP and connect to Web service Device.This process by the web page download time of high latency back haul link to introducing long delay.HTTP accelerator is maintained One group continuously coupled, and carried is transmitted by its all HTTP.

Reference picture 5, HTTP accelerator is distributed between server 3 and 5.It has separation HTTP Proxy framework, passes through Distributed between two proxy servers that this its feature is implemented at the two ends of backhaul network 4.Remote agent (long-range Opt agencies) Occur as to the HTTP Proxy for running on the browser in the equipment of the end subscriber of remote site.Central agency (central Opt Agency) it is used as the typical web client of Web server.Therefore, system uses new pencil mechanism transmission network content at these Upper " separated " http protocol of agency.

Functional module shown in Fig. 5 is as follows：

22nd, 30 long-range and central back haul link manager；

40 remote agents (long-range Opt agencies)；

41 Terminal Server Clients (HTOTP clients)；

42 central agencies (central Opt agencies)；

43 have the web content abstraction function of resolver；

44 worker threads；

45 schedulers/compression engine；

46 servers (HTOTP servers).

The task of back haul link manager 22 and 30 is to be maintained in the long-range connection between central location and to using this Order of priority is distinguished in the transmission connected a bit.Web content abstraction function (WCR) 43 includes resolver, and it parses basis HTML and determined Which need that insertion resource extracted from origin server calmly.Worker thread 44 sends single GET request to origin server And transmitted response is to scheduler.

Scheduler/compression engine 45 pushes nested object in basic HTML to remote site with mode of priority.This is excellent First it is based on：

A) which object is in the user visual field.The basic html pages can be more than many times of browser window viewing area.Use at end Family " can only see " nested object, and it is in his/her visual field；

B) size of object；

C) order of browse request object；

D) object type such as CSS has higher priority than image；

E) the preferential access group of user.The new aspect of one of the present invention is exactly that IP transmission can be directly related to cellular-specific User identifier.

When scheduler 45 pushes content to remote site, scheduler 45 provides the fairness across active user, ties up simultaneously Protect these priority class.Content such as image can be compressed further to reduce the data carried by backhaul at this moment Amount.

HTOPT servers 46, which receive (preferential), to be carried out the response of child scheduler 45 and forwards these to be responsive in multiplexing Back haul link manager 30 in stream.The task of back haul link manager 30 is to safeguard the long-range connection between central location simultaneously To distinguishing order of priority using these transmission connected.HTOPT clients 41 receive the multiplexing response for carrying out child scheduler 45 And these are responsive to long-range Opt agencies 40 as individually response forwarding.

On startup, long-range Opt agencies 40 and center Opt act on behalf of the 42 TCP connections for setting up fixed qty between them. This is only performed in startup stage and these are connected to during whole system is run and are maintained.

In order to serve the request of HTTP web pages, system is operated as follows：

- when being requested in client new web page face, to the initial GET request quilt of the page (being referred to as the basic page) Browser is sent；

- long-range Opt agencies 40 intercept the GET requests and forward the URL to center Opt generations by one of being fixedly connected Reason；

- center Opt agencies 42 extract the basic page related to URL and be transmitted to scheduler/compression from Web server to draw Hold up.Basic HTML is scheduled to be transferred to remote site by lasting connection；

- center Opt agencies 42 parse the basic HTML and regain the related web moneys for being embedded in the page immediately Source.These resources are compressed and dispatched to be transferred to remote site；

- received in remote port as basic HTML, the long-range parsing of Opt agencies 40 it come determine which resource will from In the way on ground.Then it transmits basis HTML to client.

- when client 41 sends the subsequent request to related resource, long-range Opt agencies 40 determine that resource is first It is no in the way from ground side.If it is, the request from client is merely deferred until that the resource is arrived at, otherwise, If this is the new request for the new basic page, then the step of system performs above-mentioned carried.

Separated framework optimizes web page in several different aspects and extracted.First, held by the expensive tripartite of satellite Hand is cancelled, because the TCP connections to Web server are carried out in ground side.Secondly, for adhoc basis HTML Initial GET triggered a branch of for the GET request of its nested resource sent in ground side.Related resource is by next from ground Face is delivered to remote site.Such mechanism overcomes HTTP continuous operation.3rd, compression aids in reduction and passes through satellite chain The transmission quantity on road.

It is cached to the function that one of the problem of cellular network edge is introduced is exactly Incumbent, such as lawful intercept, charging It is affected, and decommissions with customer care and service quality, these functions generally resides on the core net of operator as expected, It is therefore contemplated that all data and content that pass through Core Network Service.In terms of charging, cache hit may introduce a variety of chargings Under or charging on scheme.Lawful intercept is needed for accurate data duplication to a lawful intercept server.Due to slow Deposit hit rate not being taken into account in QoS configuration file factors, service quality is also influenceed by caching.In the caching of base station site Hit will serve local data and will not pass through operator network thus influence these functions.As long-range optimization with The part of centre optimization server, the present invention realizes symmetrical cache structure, and cache key and data are answered in each node wherein Make and only one is referred to by transmission between back haul link manager 22 and 30 in figs. 3 and 4 in a cache hit. In fig. 2, by the data between remote optimisation server 3 and base station 2 and center optimization server 5 and SGSN 8/ is passed through Data between GGSN 9 are existing True Datas, without the present invention in appropriate position.This respect maintains operator Lawful intercept, charging and qos feature.Typical operation scenario is as follows：

- user asks some data from Internet web server, such as video clipping server video Stream.

- when originally by network, content will not be presented in the caching in long-range and central server.Content is added Key for example using hash function and is stored in long-range and central cache.Video passes through with some optimizations in this case The backhaul of feature such as protocol optimization.

- secondarily with when then passing through network, content is in long-range and central optimization server plus key and slow Only one is referred to and sent by backhaul when depositing hit.

- optimizing server in center, the initial request of user and response will retain operator by core net and therefore Lawful intercept, charging and qos feature but with reference to being sent by backhaul.

- in remote optimisation server, initial or present content is according to the instruction of reference by long-range optimization caching clothes Business.

The characteristic of mobile cellular network needs to cache the various ways implemented.Web is buffered at static content such as HTML Reason but has poor caching rate very well but for video and dynamic content.Byte and object are cached very well still to content of multimedia Byte cache for example needs big keys sizes for big document size such as video and equity transmission.System uses caching for example Web cachings, target cache and block/byte cache and caching are substantially symmetrical, to implement to be layered cache way.Due to honeycomb Signaling is by long-range and central server, the handling capacity sum that server can be based on best cache hit scene, necessary data Data are made to adapt to cache layer and Hash mechanism according to size.Also recognize and for example can for data session for the cell global identity of specific stream Words are real-time, stream is real-time, the interactive certain content and QoS done one's best with background of doing one's best, while also specifying accessing wirelessly to hold Carry characteristic for example maximum and guarantee bit rate, error rate, payload size and delay.Long-range and central server is also in IP Layer performs packet inspection.The present invention uses honeycomb parameter combination IP fractional analysis and inspection, determines that cached parameters such as Hash is close Key algorithm, caching block size, the caching of data payload remove the disk storage management of strategy and caching.

Another aspect of the present invention is that long-range and central optimization server 3 and 5 can monitor honeycomb mobile messaging and geographical position Data are put, therefore the data cached mobility that can meet user is moved to remote node from remote node or is eliminated.

Also, long-range and center optimization server 3 and 5 can be used standard packet Examined effect to aid in QoS decision, remove Go back the preheating and preextraction of auxiliary cache outside this, the data frequently used here based on user in the behavior of specific cell and by Pre-cache.System determines which remote cache pre-download is relevant to specific user's it is also possible to consider the Move Mode of user Data, if group user is in a cell.

Another feature of system is exactly when one group of cell and remote optimisation server share identical backhaul, long-range optimization clothes Business device 3 can also cluster come shared key and data together.Also, the present invention allows the dynamic modification to QoS characteristics and behavior Protocol optimization and compression to consider cache hit rate, with bandwidth is saved.

But it is described above be related to mobile (honeycomb) data network such as 3GPP 3G and 4G networks, described technology can Fixed-bandwidth is equally applied to very well and other data networks are configured.

Reference picture 6 and 7, in another embodiment, remote optimisation server 50 comprising long-range peer agent 51 (RPA) and Long-range equity (P2P) caching 52 and the shown mobile P 2 P client 53 communicated.Center optimization server 60 has center Peer agent 61 (CPA) and center P2P cachings 62.It communicates and onwards objective with P2P by internet 10 with outside GGSN 63 Family end 65 and P2P tracking systems (for example, P2P trackers 66) communication.

Server 50 and 60 has other multiple features, is provided in the context of the mobile network of connection reciprocity (P2P) The optimization of agreement.Server realizes the optimization of backhaul network 4, while equity (P2P) client meeting where safeguarding mobile subscriber The transparency of words.When mobile device is by reciprocity (P2P) session of cellular infrastructure foundation, peer agent 51 and 61, which is set up, is returning The long-range and core-network side of journey network 4.These part co-ordinations, with from mobile subscriber, their contra 65 and its He is from the perspective of the server (such as P2P trackers 66) being related in setting up and safeguarding peering session, and behavior is transparent.

This means the mobile P 2 P client 53 of user using existing peer protocol come the peer communications with them (even so, in fact RPA represents the reciprocity end operation of P2P networks of user).In addition, agency 61 is come using existing peer protocol PERCOM peripheral communication is carried out with reciprocity end and other servers for representing client, also means that external client and server are just used Existing peer protocol and the presentation for being not concerned with these miscellaneous parts.

Backhaul network 4 between long-range and central peer agent 51 and 61 is used to transmission data as ongoing The part of peering session.System is using the symmetrical cache structure of separation for the data that precedent transmission can be stored on two agencies come excellent Change the exchange data between agency 51 and 61.For example, being downloaded when the mobile P 2 P client 53 of mobile subscriber is had requested that from opposite end Data, if the data are transmitted before between RPA and CPA, and two are acted on behalf of the copy for still retaining the data, and CPA can Indicate that RPA pellucidly provides the data for representing that node to client, otherwise transmit that node.Similarly, when data by Client uploads to one or more reciprocity ends, and RPA may indicate that CPA provides long-range equity of the data to it for representing client End.

When mobile network's topology allows, CPA may further indicate that specific RPA, and another RPA has the information that it is asked, and And in order to save the purpose of bandwidth, CPA indicates initial RPA, it will be from second RPA request described information.

In this way, reciprocity upload/download statistics keeps transparent, it is allowed to which peer protocol management is uploaded and download rate, is seemed Client is directly as its reciprocity end connection.This is critically important, and for example agreement selects equity using " reciprocity " mechanism here End and download rate.The transparency is also retained in shift scene, RPA and CPA co-ordinations here are so as to consider the mobility of user.

System also optimizes the reciprocity behavior in network using the position of network topology knowledge and connection user.Especially Position of each reciprocity end on cellular network topologies is noticed, P2P sessions can be monitored to set up exchange data pair in network Deng the position at end.It can use the knowledge to recognize peer to peer connection, identical (long-range) side that two sides connect in backhaul here.Connect , by transmission peer-data between these reciprocity ends, without transmitting data by backhaul, this results in prolonging Late, handling capacity and bandwidth use upper improvement, while meeting lawful intercept and billing requirements.This can occur in independent RPA or wear In the context for crossing two or more RPA.It potentially also occurs in CPA ranks.

In place of the reciprocity end in cellular network topologies, by other factors such as effective bandwidth, delay, transmission and QoS It is possibly realized including cost consideration.One aspect of the present invention be exactly information be also used to modification setting up and safeguarding peer to peer connection When reciprocity end weight.

Packet transmission is provided by PDP Context in cellular environment, and the context IP address is connected pass with user Connection；These are distributed and safeguarded by core net (GGSN).IP address streams of trace data can be used in peer protocol, and which is counted A little data flows are used to manage reciprocity end selection and availability in turn.Passed by associating the data from PDP Context with equity Defeated stream, can be maintained from the user identity from the point of view of peer-to-peer network visual angle across multiplexing PDP Context.The information can also quilt Determination for the guide service quality in cellular environment.

Fig. 5 is referred again to back, component 40 and 42 can have honeycomb and data-optimized function.Group in center optimization server The cellular functionality of part 42 is responsible for the interworking with cellular core network.It monitors cellular signaling to determine the when positive profit of phone user Use cellular packet data service.Central cell component 42 monitors the activation and invalid PDP (packet counts by user's execution is individually moved According to agreement) context.When PDP Context is established, it distribute unique identifier to each PDP Context and with it is long-range excellent The peer component changed on server shares the information.That is shared between long-range and central optimization function is used for each above and below PDP The PDP particular communitys of text include：

- unique PDP identifiers；

- user IMSI；

- PDP Context APN；

- PDP qos parameters；

- pdp address

- GGSN addresses；

- GGSN sides tunnel identifier；

- cell side tunnel identifier.

The cellular functionality of the component 40 of remote optimisation server analyzes the transmission of phone user's plane, and determines originating call User and the PDP Context used based on shared PDP Context data.Communicated long-range between central data optimization component Period, PDP Context identifier is retained.The context data can be sent out in remotely optimization node between center optimization node Send, either with the interior part as data payload for example as the HEMLGet parameters asked or with an external signaling In information unit in message, or it is used as single message.Center optimization node re-establishes direction using PDP reference parameters The tunnel of core net.Unique PDP Context identifier causes cellular component when the GGSN with core net is interacted comprising content The appropriate GPRS tunnels of selection.By removing the protocol overhead for user-plane transmissions, the effect of above-mentioned steps provides honeycomb The protocol optimization of agreement, while being maintained into core net and long-range RNC/Node-B accurate communication.

When another aspect of the present invention is exactly that if it happens user moves in shift scene between remote server, Allow the transmission for carrying out PDP reference informations between remote server by central node.

Association PDP Context parameter is shared between center and remote optimisation server 40 and 42 to be realized：

- when application data and bandwidth optimization, it is retained in honeycomb in long-range and central optimization the data-optimized of server The qos parameter that domain is conferred；

- user identity and Access Point Name (APN) are included as the parameter of transmission class component, and

- when application bandwidth is managed, user identity is used as a determination factor.

The present invention is not limited to described embodiment, but can have change in framework and details.Here term " base Stand " used, it may imply that the basic transceiving stations of GSM or its equivalent situation, such as 3G network node B or eNode B. Backhaul network may include any communication network, and transmission, including such as satellite link are limited by its needs.

Claims (14)

1. a kind of communication system, including：

Remote optimisation server (3), it is applied to and base station communication, and the remote optimisation server is via the base station and movement Client is communicated,

Center optimization server (5) in core net, it is applied to by backhaul network (4) and the long-range optimization service Device communicates, and is communicated with core network element for data transfer, and

Wherein described remote optimisation server and the center optimization server are applied to：There is provided to local data service device (23, 24) access, manages the communication by the backhaul network (4), data buffer storage is performed, so as to user and core network element It is that transparent mode reduces data transfer by the backhaul network, it is characterised in that：

The remote optimisation server includes long-range peer agent (51), and the center optimization server includes central peer agent (61), the long-range peer agent represents the reciprocity end of peer-to-peer network of the mobile client, and the central peer agent is represented The mobile client, the agency be all for the reciprocity end of mobile client and its network it is transparent,

It is described to act on behalf of (51,61) all by data buffer storage in the symmetrical cache structure of a separation, in the symmetrical caching of the separation In framework, by back haul link cache exchanging key between server, the data are previously in the remote optimisation server Transmitted between the center optimization server, and

Server (3,5) is applied to check the data that the server is sent to other servers, and dynamically modification caching ginseng Number, the cached parameters include：Queue size or key schedule or block size or data cached holding strategy.

2. communication system as claimed in claim 1, wherein the center optimization server (5) is applied to and the core network element Part connection is for monitoring, customer service, book keeping operation and safety, wherein the center optimization server is applied to：Simulation base station control Device processed is adapted for carrying out compressing, wherein in described towards the interface of other core network elements wherein the center optimizes server Centre optimization server is adapted for carrying out (33,34) protocol optimization, wherein the remote optimisation server is applied in remote site A subset of RNC, SGSN and GGSN function is realized, to show unencapsulated and unencryption user's IP operation in the remote site So that the IP operation can be managed and be optimized, wherein the remote optimisation server is adapted for carrying out to local datastore (23) Direct IP access, enabling base station (2) website carry out local data access.

3. communication system as claimed in claim 1 or 2, wherein the remote optimisation server includes：Business grader (20), User data optimization functional unit (21) and back haul link manager (22), wherein the back haul link manager (22) is applied to Local datastore (23) is accessed, wherein the center optimization server includes：Back haul link manager (30), user data are excellent Change functional unit (31) and Protocol Relay functional unit (33), wherein the business grader (20) of the remote optimisation server is fitted For, service observation is performed, and by the delineation of activities into different classes of, and submitting to the back haul link manager Mark before it is described different classes of, wherein the remote optimisation server (3) is applied to prevent particular category in special time Business carries out backhaul communication, wherein the back haul link manager (22,30) is applied to according to class of service dynamic select carrier, Wherein described selection is according to service quality standard and user equipment progress.

4. communication system as claimed in claim 1 or 2, wherein the server is applied to：

Service optimization is performed, it includes caching and preextraction, the caching is used to ensure only to download by backhaul in the page to change Object；

Transimiison analysis is performed, to determine data, the data compression to be downloaded between non-peak period；

Perform the compression algorithm for header and payload；And

Perform header-compressed.

5. communication system as claimed in claim 1 or 2, wherein the remote optimisation server includes HTTP accelerator (41), It optimizes function to extract a branch of resource associated with the request to basic HTML, wherein institute using client and server end State HTTP accelerator (41) to be continuously connected with suitable for safeguarding one group, be continuously connected with passing to carry all HTTP by described one group It is defeated, wherein the HTTP accelerator (41,46) has the broker architecture of separation, in the broker architecture of the separation, function point On the server for being distributed in back haul link two ends, wherein remote agent (40) is clear on the user equipment of remote site as running on Look at device HTTP Proxy and occur, and central agency be used as Web server typical Web client.

6. communication system as claimed in claim 1 or 2, wherein the optimization server (3,5) is applied to be based on：Which object The order of object, object type, the priority of user in the visual field of user, described in the size of the object, browse request Access group, and optimization is performed, wherein IP operation is directly related to cellular-specific user identifier.

7. communication system as claimed in claim 5, wherein the optimization server (3,5) be adapted for carrying out the following steps so as to Serve the request of HTTP Web pages：

When needing the basic page in client, initial GET request is sent by browser for the page；

Remote agent intercepts the GET request and forwards URL to central agency；

The central agency obtains the basic page associated with the URL from Web server, and the basic page is transmitted To the scheduler and compression engine of the center optimization server, the scheduler and compression engine dispatch the basic HTML with By being continuously connected with being transferred to the remote site；

The central agency parses the basic HTML, and extracts the related Web resource being embedded in the page immediately, and compression is simultaneously These resources are dispatched to be transferred to the remote site；

In remote port, the remote agent parses the basic HTML to determine which resource will be transmitted, then described long-range The basic HTML is transferred to the client by agency；And

When the client carries out follow-up request to the related resource, the remote agent determines the resource first Whether it is currently transmitted, if the resource is currently transmitted, the request from the client is merely deferred until the money Untill source is arrived at；Otherwise, if this is the new request to the new basic page, then the system performs above-mentioned steps.

8. communication system as claimed in claim 1 or 2, wherein the central peer agent (61) is applied to described long-range right Notified Deng agency (51)：Aided remote equity of the data asked in the identical or different remote optimisation server of the system It is available on agency, wherein described act on behalf of peer to peer connection and the position for being adapted to monitor for mobile client, wherein the agency It is applied to：In the case where needs are a small amount of using backhaul network or without using backhaul network, monitored information is used described Peer-data is guided between reciprocity end on the same side of backhaul network, wherein the agency is applied to modification when foundation and tieed up The standard at selection reciprocity end when protecting peer to peer connection, wherein the standard includes the appearance of position, radio link quality or remote cell The capacity of amount or back haul link.

9. communication system as claimed in claim 8, wherein the agency (51,61) is applied on multiple packet data protocols Hereinafter safeguard the identity of client, wherein the server be adapted to monitor for packet data protocol PDP Context activation and Deactivate, carry out distribution marker to each context, and the identifier is shared with other servers.

10. communication system as claimed in claim 1 or 2, wherein the remote optimisation server and the center optimization service Device (3,5) is applied to：Data are extracted by the core net, even if the data are from caching by the remote optimisation server Transmission is also in this way, wherein described remote optimisation server (3) is applied to without being transmitted by back haul link：Only exist The data are drawn to after the center optimization server by the core net, just transmit the data.

11. communication system as claimed in claim 10, wherein the remote optimisation server (3) be applied to delay transmission until Untill receiving after the permission from the center optimization server.

12. communication system as claimed in claim 1 or 2, wherein the remote optimisation server (3) is adapted to monitor for caching and made With, and it will be available to be based on more backhaul capacities if caching uses height, correspondingly to determine the use of backhaul network, QoS parameter is dynamically changed in the monitoring that wherein described remote optimisation server (3) is applied to be used according to caching, described slow Deposit the designator for using and being used as backhaul network.

13. communication system as claimed in claim 1 or 2, wherein the system includes multiple remote optimisation servers (3), its Described in remote optimisation server be suitable to propelling data to another remote optimisation server.

14. communication system as claimed in claim 13, wherein the remote optimisation server is using cluster architecture and shared phase Same back haul link.