WO2013060133A1 - 一种基于策略控制的缓存方法和系统 - Google Patents

一种基于策略控制的缓存方法和系统 Download PDF

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Publication number
WO2013060133A1
WO2013060133A1 PCT/CN2012/074929 CN2012074929W WO2013060133A1 WO 2013060133 A1 WO2013060133 A1 WO 2013060133A1 CN 2012074929 W CN2012074929 W CN 2012074929W WO 2013060133 A1 WO2013060133 A1 WO 2013060133A1
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Prior art keywords
cache
user identifier
network
pcrf
service policy
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PCT/CN2012/074929
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English (en)
French (fr)
Inventor
陈亚斌
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中兴通讯股份有限公司
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Publication of WO2013060133A1 publication Critical patent/WO2013060133A1/zh

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L41/00Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
    • H04L41/50Network service management, e.g. ensuring proper service fulfilment according to agreements
    • H04L41/5041Network service management, e.g. ensuring proper service fulfilment according to agreements characterised by the time relationship between creation and deployment of a service
    • H04L41/5054Automatic deployment of services triggered by the service manager, e.g. service implementation by automatic configuration of network components

Definitions

  • the present invention relates to network caching technology in the Internet, and more particularly to a method and system for caching based on policy control. Background technique
  • Peer-to-Peer download, Hypertext Transfer Protocol (HTTP) online video and other applications are more and more widely used, and its traffic has occupied the backbone network 60.
  • HTTP Hypertext Transfer Protocol
  • bandwidth With a bandwidth of ⁇ 70% or more, it is foreseeable that the rate of future bandwidth growth will not meet the bandwidth requirements of Internet applications.
  • insufficient total bandwidth the development of new applications consumes a large amount of bandwidth, and insufficient bandwidth may affect the experience of some users' basic applications, such as web browsing (WEB) browsing.
  • WEB web browsing
  • the basis of the existing mobile Internet is the wireless network, and the determinants of the access capability of the wireless network include: bandwidth and price.
  • these two factors are also the bottleneck of wireless network access capability.
  • the access capability of mobile wireless networks has been slow in the past, and there is a huge gap compared with fixed broadband.
  • wireless networks have developed into high-speed link packets.
  • HSPA High Speed Uplink Packet Access
  • LET Long Term Evolution
  • ISP Internet content providers
  • the web server or image is placed in the network of mainstream broadband service providers.
  • mobile users need to access Internet content, which usually requires cross-networking.
  • Inter-network bandwidth between operators often has limited bandwidth due to competition factors, and the traffic settlement cost is expensive. So for a late starter move In terms of the Internet, this is an important shortcoming at this stage, which seriously affects the user's broadband access experience and increases operating costs due to expensive settlement costs.
  • the ISP's web server is generally set in a centralized manner. Users are distributed throughout a large network. There may be long-distance transmission between ISP servers, and long-distance transmission means large transmission delay. At the same time, it means that there are many network congestion nodes on the transmission path that may affect the transmission quality, so delay and transmission quality will directly affect the user's Internet access experience.
  • the WEB Cache is transparently deployed in the network as a cache device, and is used to monitor hotspot objects currently accessed by the network, cache the hotspot objects locally, and replace the original with the WEB Cache when subsequent users continue to access.
  • the cache feature is 1 time storage and multiple output. This feature of the WEB Cache product can alleviate the lack of content for mobile operators and the high cost of network traffic settlement.
  • WEB Cache settings can be layered. The next layer of WEB Cache should be close to the user. Setting the WEB Cache on the local network can serve local users and reduce hotspots.
  • the basic WEB Cache technology is currently widely used on the Internet, and the cache device can be deployed separately or in combination with various types of proxy devices or gateways.
  • Different nodes in the Internet can repeatedly set the cache device, for example: the proxy gateway in the company-level proxy server (PROXY) can deploy WEB Cache; the city local network Internet gateway can deploy WEB Cache; the regional Internet gateway deploys WEB Cache; Deploy the WEB Cache at the Internet gateway.
  • Each cache device is typically deployed independently, with no logical interfaces between cache devices and between cache devices and other network devices.
  • the caching device provides homogenization services for all users under the network and all services.
  • the existing WEB Cache technology restricts operators to provide more refined customization. Service. For example, the following business scenarios:
  • Business scenario 1 The operator classifies users into categories A, B, and C.
  • A is a VIP high-value user, and the value of users B and C is gradually decreasing.
  • Operators want to provide customized cache services for Class A users. For example, operators provide separate cache spaces for each VIP user.
  • Each Class A user has a separate cache space, which can cache hotspots according to the user's access habits. For some non-popular hotspots, the system-level cache hotspot threshold is not met. These contents are not cached in the system's overall cache, but can be cached in a separate individual's cache space for VIP users. User access speed can be increased when VIP users repeatedly access.
  • Business scenario 2 Since the ability of the cache to output hotspot objects to the user is limited, there may be insufficient output capability for a particular hotspot period even if the overall requirements are met. Therefore, under the premise of user classification, the cache output of a specific user can be preferentially guaranteed to ensure the user's access experience.
  • Cache as a kind of traffic acceleration service can provide users with monthly or Widely customized services, these need to be associated with user information, as well as service policies, and existing cache devices do not have enough information to support this classification service.
  • Cache devices deployed by integrated carriers may serve both fixed broadband and mobile broadband users.
  • the access methods of these two types of users and the capabilities of the terminals vary greatly, so the requirements for caching are also different.
  • Desktop PCs and laptops have high access bandwidth and large access network traffic.
  • Caches deployed by operators cache their hotspots.
  • the absolute value of traffic is different from that of fixed-line broadband, so the same cache device.
  • the access hotspot of the mobile user is flooded by the fixed broadband access hotspot. Therefore, if the cache device can obtain the user information, the hotspot of the mobile user is separately counted, which can effectively avoid the situation. .
  • the main purpose of the embodiments of the present invention is to provide a method and system for buffering based on policy control, which can solve the problem that the existing network cache device cannot provide targeted fine services.
  • the embodiment of the present invention provides a method for caching based on policy control, where the method includes: adding, by a packet switching device, a user identifier of forwarding data to a packet In the packet, and sent to the network cache device;
  • the network cache device extracts the user identifier, and reports the user identifier and/or service information of the forwarded data to the policy control device (PCRF);
  • PCRF policy control device
  • the PCRF is associated with the corresponding cache service policy according to the user identifier and/or the service information, and sends the cache service policy to the network cache device.
  • the network cache device performs a cache operation according to the cached service policy.
  • the network cache device extracts the user identifier, and adds the user identifier and/or service of the forwarded data to the packet data packet;
  • the network cache device performs a cache operation according to the cache service policy, and the cache service policy is associated with the corresponding cache service policy by the PCRF according to the user identifier and/or the service information, and is sent to the network cache device.
  • the method further includes:
  • the updated cache service policy is re-acquired from the PCRF to perform a cache operation
  • the updated cache service policy is sent to the network cache device, and the network cache device performs a cache operation.
  • the packet switching device adds the user identifier of the forwarded data to the packet data packet, specifically:
  • the tag of the user identifier is added to the header portion of the packet data packet, and the user identifier, wherein the user identifier comprises: a mobile subscriber integrated service digital network number (MSISDN), or an international mobile subscriber identity (IMSI).
  • MSISDN mobile subscriber integrated service digital network number
  • IMSI international mobile subscriber identity
  • the method further includes: when the network cache device performs reassembly analysis on the forwarding data, the network cache device detects whether the packet data packet includes the label of the user identifier, and if not, terminates The method flow, if yes, determines whether the cache operation controlled based on the cache service policy is activated, and if so, extracts the user identifier; if not, terminates the method flow.
  • the network cache device sends the user identifier and/or the service information of the forwarded data to the PCRF, specifically: according to the locally saved PCRF address, initiates session construction to the PCRF.
  • the request, the session establishment request carries the user identifier, and/or service information;
  • the PCRF sends the cache service policy to the network cache device, specifically: the PCRF carries the cache service policy in session establishment. In response, it is sent to the network cache device.
  • the embodiment of the present invention further provides a cache system based on policy control, where the system includes: a packet switching device, a network cache device, and a PCRF;
  • the packet switching device is configured to add a user identifier for forwarding data to the packet data packet, and send the packet to the network cache device;
  • the network cache device is configured to extract a user identifier, report the user identifier and/or the service information of the forwarded data to the PCRF, and perform a cache operation according to the cached service policy sent by the PCRF;
  • the PCRF is configured to be associated with the corresponding cache service policy according to the user identifier and/or the service information, and send the cache service policy to the network cache device.
  • the network cache device is further configured to: after the network cache device detects that the service for forwarding data changes, after the cache operation is performed according to the cache service policy, re-acquire the updated cache service policy from the PCRF, and perform a cache operation. ;
  • the PCRF is further configured to: when the cache service policy in the PCRF changes, after the cache operation is performed according to the cache service policy, send the updated cache service policy to the network cache device, and the network cache device performs a cache operation.
  • the packet switching device adds the user identifier of the forwarded data to the packet data packet, specifically:
  • the network caching device is further configured to: before the retrieving and analyzing the forwarding data, detecting whether the packet data packet includes a label of the user identifier, if not, operating according to the prior art, if yes Then determine the cache operation based on the cached business policy control Whether to activate, if activated, extract the user ID.
  • the network cache device sends the user identifier and/or the service information of the forwarded data to the PCRF, specifically: sending a session establishment request to the PCRF according to the locally saved PCRF address, where the session establishment request is Carrying the user identifier, and/or service information;
  • the PCRF sends the cached service policy to the network cache device, where the PCRF carries the cached service policy in the session establishment response and sends the cached service policy to the network cache device.
  • the packet switching device adds the user identifier of the forwarded data to the packet data packet, and sends the user identifier to the network cache device; the network cache device extracts the user identifier, and forwards the The user identifier of the data, and/or the service information is reported to the PCRF; the PCRF is associated with the corresponding cache service policy according to the user identifier and/or the service information, and the cache service policy is sent to the network cache device;
  • the cache business policy performs a cache operation. This allows the network caching device to no longer operate independently, and can be combined with the packet network to provide customized caching services to users based on different policies defined in the PCRF. Interactive, customized caching services can be provided for different levels of users, and/or for different levels of service.
  • FIG. 1 is a schematic diagram of a network architecture according to an embodiment of the present invention
  • FIG. 2 is a schematic flowchart of a method for caching based on policy control according to an embodiment of the present invention
  • FIG. 3 is a schematic flowchart of a method for caching a policy-based caching method according to an embodiment of the present invention
  • FIG. 1 is a schematic diagram of a network architecture according to an embodiment of the present invention.
  • the network includes: a packet switching device 11 and a policy. a control device (PCRF) 12 and a network cache device 13; wherein
  • the packet switching device 11, such as a GGSN in a mobile network, is responsible for accessing a packet network of broadband users and accessing user traffic to the Internet.
  • the Policy Control Device 12, the PCRF is defined in 3GPP, which is responsible for policy control over charging, and there is a standard Gx interface between the PCRF 12 and the packet switching device 11.
  • the packet switching device 11 reports the user service to the PCRF 12, and the PCRF 12 determines to execute different policies for different services.
  • the network caching device 13 is typically deployed at the aggregation level of the packet network between the packet switching device 11 and the Internet egress. There is no interface between the network cache device 13 and the PCRF 12 in the prior art.
  • the packet switching device adds the user identifier of the forwarded data to the packet data packet, and sends the identifier to the network cache device; the network cache device extracts the user identifier, and the user identifier of the forwarded data, and/ Or the service information is reported to the PCRF.
  • the PCRF is associated with the corresponding cache service policy according to the user identifier and/or the service information, and the cache service policy is sent to the network cache device.
  • the network cache device performs the cache operation according to the cache service policy.
  • FIG. 2 is a schematic flowchart of a method for caching based on policy control according to an embodiment of the present invention. As shown in FIG. 2, the method includes the following steps:
  • Step 201 The packet switching device adds the user identifier of the forwarded data to the packet data packet, and sends the identifier to the network cache device.
  • the packet switching device adds the user identifier of the forwarded data to the packet data packet, specifically: adding a label of the user identifier and a user identifier in a packet header portion of the packet data packet.
  • the label of the user identifier is used to indicate whether the user identifier is present. If the label of the user identifier is used, the user identifier is carried. If not, the user identifier is not carried.
  • the user identity includes: a mobile subscriber integrated service digital network number (MSISDN), or an international mobile subscriber identification code (IMSI).
  • MSISDN mobile subscriber integrated service digital network number
  • IMSI international mobile subscriber identification code
  • Step 202 The network cache device extracts the user identifier, and reports the user identifier and/or service information of the forwarded data to the PCRF.
  • the address of the PCRF is also configured in the network cache device, and is used when reporting user identifiers and/or service information.
  • the network cache device reports the user identifier and/or the service information of the forwarded data to the PCRF, and specifically: sending a session establishment request to the PCRF according to the locally saved PCRF address, where the session establishment request carries the user
  • the identifier, and/or the service letter step 203 the PCRF is associated with the corresponding cache service policy according to the user identifier, and/or the service information, and sends the cache service policy to the network cache device.
  • the PCRF sends the cache service policy to the network cache device, where the PCRF carries the cache service policy in the session establishment response and sends the cache service policy to the network cache device.
  • the cached service policy includes: a cache capacity, and/or an overall cache download rate, and/or a different type of service cache download rate, and/or a cache service time.
  • Step 204 The network cache device performs a cache operation according to the cached service policy.
  • an interface for transmitting a message needs to be added between the network buffer device and the PCRF, and an interface between the network cache device and the PCRF is exchanged with the existing packet.
  • the interface between the device and the PCRF is similar.
  • the method further includes: the packet switching device determining whether the network supports the cache operation controlled by the cache service policy, and if yes, performing step 201, that is, the packet switching device adds the user identifier of the forwarded data. To the packet data packet; if not, terminate the method flow. After terminating the process, it can be followed by the prior art.
  • the method further includes: when the network cache device performs reorganization analysis on the forwarding data, the network cache device detects whether the packet data packet includes the label of the user identifier, If not, the method flow is terminated. If yes, it is determined whether the cache operation controlled based on the cache service policy is activated. If it is already activated, the user identifier is extracted; if not, the method flow is terminated. Terminate the method After the process, follow-up operations can be performed according to the prior art.
  • step 204 after the network caching device performs the caching operation according to the caching service policy, the method further includes: when the network caching device detects that the service of forwarding data changes, re-acquiring the updated information from the PCRF. Cache the service policy, perform the cache operation; or send the updated cache service policy to the network cache device when the cache service policy changes in the PCRF, and the network cache device performs the cache operation.
  • the service changes, including: starting a new service, or stopping the service, or downloading the traffic to a threshold.
  • the network cache device re-acquires the updated cache service policy from the PCRF
  • the method includes: the network cache device sends the changed service information to the PCRF by using the service information notification request; and the PCRF uses the service information notification response to update the cache service.
  • the policy is sent to the network cache device.
  • the cached service policy in the PCRF changes, the updated cache service policy is sent to the network cache device, where the PCRF uses the policy update request to send the updated cache service policy to the network cache device.
  • the method further includes: the network caching device returns a policy update response to the PCRF.
  • FIG. 3 is a schematic flowchart of a specific method for a policy-based caching method according to the present invention.
  • the packet switching device is a GGSN
  • the network cache device is a CACHE
  • the policy control device is a PCRF.
  • the process includes:
  • Step 301 The GGSN is responsible for bidirectional routing function of packet traffic between the packet access network and the Internet in the packet network. After the packet user accesses from the cellular network, the GGSN is accessed through the GPRS service support node (SGSN), and the GGSN is stored in the GGSN. User information, including MSISDN, IMSI, etc. The GGSN determines whether the network supports the policy-based caching function described in this patent. If the processing is not supported, the GGSN is required to carry the user identifier in the packet header of the packet when forwarding the user data traffic to the Internet, such as MSISDN. , IMSI. A label for adding a custom user ID and a user ID are added to the packet header.
  • Step 302 The CACHE is serially arranged in the network, and performs basic processing of the CACHE device when receiving the bidirectional packet message between the GGSN and the Internet, including: packet packet reassembly, deep packet inspection, etc., CACHE determines whether the network supports Policy-based cache control, if you support cache-based policy control, you also need to configure the PCRF address of the local packet network. The CACHE determines whether the user identifier is included in the reassembly analysis of the GGSN's message sent to the Internet, and performs the following processing:
  • the CACHE process is the same as the prior art and does not trigger interaction with the PCRF;
  • the CACHE does not trigger the interaction with the PCRF, and needs to remove the packet header of the user identifier when forwarding the packet message to the Internet side.
  • the CACHE initiates a session establishment request to the PCRF to the locally recorded PCRF address, including but not limited to the user identifier MSISDN or IMSI, identifying the current packet service flow. logo.
  • Step 303 The PCRF receives the session establishment request initiated by the CACHE, and associates the user account opening information with the service identifier and the service identifier included in the request, and determines the policy of the current service.
  • the PCRF sends the current policy-related information to the CACHE through the session establishment response. , including but not limited to cache capacity, and/or overall cache download rate, and/or different types of service cache download rates, and/or cache service times, which are executed after the CACHE device is received;
  • Step 304 If the CACHE detects a service change, for example, a new service start, or a service stop, or a download event that reaches a threshold, the notification is notified to the PCRF through the service information notification request;
  • a service change for example, a new service start, or a service stop, or a download event that reaches a threshold
  • Step 305 The PCRF receives the decision related policy, and notifies the CACHE of the current policy by using the service information notification response, and the CACHE receives and executes;
  • Step 306 if the PCRF causes a policy change due to triggering of other events, actively The CACHE device initiates a policy request and carries the current policy information;
  • Step 307 CACHE is executed after receiving, and returns an update response.
  • FIG. 4 is a schematic structural diagram of a cache system based on policy control according to an embodiment of the present invention. As shown in FIG. 4, the system includes: a packet switching device 41, a network buffer device 42, and a PCRF 43;
  • the packet switching device 41 is configured to add a user identifier for forwarding data to the packet data packet, and send the packet to the network cache device 42.
  • the packet is specifically: adding a label of the user identifier to the packet header portion of the packet data packet, and User ID.
  • the label of the user identifier is used to indicate whether the user identifier is included. If there is a label of the user identifier, the user identifier is carried. If not, the user identifier is not carried.
  • the user identification includes: MSISDN, or IMSI.
  • the network cache device 42 is configured to extract a user identifier, report the user identifier and/or service information of the forwarded data to the PCRF 43, and perform a cache operation according to the cache service policy sent by the PCRF 43;
  • the address of the PCRF 43 is also configured in the network cache device 42 for use in reporting user identifiers and/or service information.
  • the network cache device 42 reports the user identifier and/or the service information of the forwarded data to the PCRF 43, and specifically: a session establishment request is initiated to the PCRF 43 according to the locally stored PCRF43 address, where the session establishment request carries the User identification, and/or business information.
  • the PCRF43 is configured to send the cached service policy to the network cache device 42 according to the user identifier and/or service information associated with the corresponding cache service policy.
  • the PCRF 43 sends the cache service policy to the network cache device 42.
  • the PCRF 43 carries the cache service policy in the session establishment response, and sends the cache service policy to the network cache device 42.
  • the cached service policy includes: a cache capacity, and/or an overall cache download speed Rate, and/or different types of service cache download rates, and/or cache service times.
  • an interface for transmitting a message needs to be added between the network buffer device 42 and the PCRF 43, and an interface between the network buffer device 42 and the PCRF 43 is as described in the existing The interface between the packet switching device 41 and the PCRF 43 is similar.
  • the packet switching device 41 is further configured to: before the user identifier of the forwarding data is added to the packet data packet, determine whether the network supports the cache operation controlled by the cache service policy, and if the user supports the data forwarding The identity is added to the packet packet; if it is not supported, it operates according to the prior art.
  • the network cache device 42 is further configured to: before performing the re-analysis of the forwarding data, before detecting the forwarding of the user identifier, detecting whether the packet data packet includes the label of the user identifier, and if not, operating according to the prior art. If yes, it is judged whether the cache operation controlled based on the cache service policy is activated, if it is already activated, the user identifier is extracted; if it is not already activated, it operates according to the prior art.
  • the network cache device 42 is further configured to re-acquire the updated cache service policy from the PCRF 43 when the network cache device 42 detects that the service for forwarding data changes after performing the cache operation according to the cache service policy. Perform a cache operation.
  • the service changes, including: starting a new service, or stopping the service, or downloading the traffic to a threshold.
  • the network cache device 42 re-acquires the updated cache service policy from the PCRF 43, including: the network cache device 42 sends the changed service information to the PCRF 43 by using the service information notification request; the PCRF 43 uses the service information notification response, and the updated The cache service policy is sent to the network cache device 42.
  • the PCRF 43 is further configured to: after the cache operation is performed according to the cache service policy, when the cache service policy in the PCRF 43 changes, send the updated cache service policy to the network cache device 42, and the network cache device 42 Perform a cache operation.
  • the cache service policy in the PCRF 43 changes, the update will be slow.
  • the stored service policy is sent to the network cache device 42.
  • the PCRF 43 sends the updated cache service policy to the network cache device 42 by using the policy update request.
  • the method further includes: the network caching device 42 returns a policy update response to the PCRF 43.
  • the embodiment of the invention further discloses an apparatus for implementing the method performed by the network cache device.

Abstract

本发明实施例公开了一种基于策略控制的缓存方法和系统,其中方法包括:分组交换设备将转发数据的用户标识添加到分组数据包中,并发送给网络缓存设备;网络缓存设备提取用户标识,将所述转发数据的用户标识、和/或业务信息上报给PCRF;PCRF根据用户标识、和/或业务信息关联到对应的缓存业务策略,将所述缓存业务策略发送给网络缓存设备;网络缓存设备根据所述缓存业务策略执行缓存操作。这样使得网络缓存设备不再独立运作,可与分组网络结合,基于PCRF中定义的不同策略对用户提供定制化的缓存服务。可以对不同级别用户、和/或不同级别业务提供交互式的定制化缓存服务。

Description

一种基于策略控制的緩存方法和系统 技术领域
本发明涉及互联网中网络緩存技术, 特别是指一种基于策略控制的緩 存方法和系统。 背景技术
随着互联网的发展, 点对点( Peer-to-Peer, P2P )下载、 超文本传输协 i)L ( Hyper Text Transfer Protocol, HTTP )在线视频等应用越来越广泛, 其 流量已经占据了骨干网络 60~70 %甚至更高以上的带宽,可以预见未来带宽 的增长的速率远不能满足互联网应用对带宽的需求。 在总带宽不足的情况 下, 新应用的发展消耗了大量带宽, 带宽不足则会导致部分用户的基本应 用的体验受到影响, 比如网页 (WEB )浏览等。
同时, 现有移动互联网的基础是无线网络, 无线网络的接入能力的决 定因素, 包括: 带宽和价格。 同时这两个因素也是无线网络接入能力的瓶 颈, 移动无线网络的接入能力过去的发展一直比较緩慢, 跟固定宽带相比 存在着巨大的差距, 但现在无线网络发展到高速链路分组接入技术(High Speed Uplink Packet Access, HSPA ), 以及长期演进 ( Long Term Evolution, LET )阶段可以为用户提供几十兆到上百兆的带宽时,无线网络才真正为用 户的宽带数据应用打开了窗口。 在过去几十年的发展阶段中, 固定宽带是 承载用户宽带流量的绝对主体, 所以保证固定宽带用户的使用体验是互联 网内容提供商 ( Internet Service Provider, ISP )优先级最高的任务, ISP会 将网站服务器或镜像设置在主流的宽带服务商的网络中。 现阶段移动用户 需要访问互联网内容通常都需要跨网, 而运营商之间的跨网带宽由于竟争 的因素往往带宽有限, 同时流量结算费用昂贵。 所以对于起步较晚的移动 互联网而言, 现阶段这是一块重要的短板, 严重影响了用户的宽带访问体 验, 又由于昂贵的结算费用增加了经营成本。
进一步的, ISP的网站服务器一般都是集中方式设置, 在一个较大的网 络之中用户分布各地, 连接到 ISP服务器之间可能有长距离的传输, 长途 传输则意味着较大的传输时延, 同时意味着传输路径上可能影响传输质量 的网络拥塞节点比较多, 这样时延与传输质量都会直接影响用户的互联网 访问体验。
上述问题都是现阶段影响移动互联网发展的因素, 而网络高速緩沖存 储器( WEB Cache ), 即网络緩存设备, 正是针对这些影响移动互联网发展 的因素的解决方案。 .
由于现阶段互联网中占用流量的业务, 例如: P2P下载、 HTTP下载、 HTTP视频、 WEB浏览等绝大部分流量都是由用户侧发起的流量, 用户的 访问行为具有热点集中, 并且追逐热点的特征, 即同一时间网络上大部分 的流量都用于传输完全相同的热点内容, 这意味着短时间内同一个热点对 象被反复传输, 并且在不同的用户之间重复传输。 这些传输可能发生在本 地网之间, 也可能会占用宝贵的长途传输资源。 因此引入了 WEB Cache技 术。
在互联网络中, 所述 WEB Cache作为一个緩存装置, 透明部署在网络 之中, 用于监控当前网络访问的热点对象, 将热点对象緩存在本地, 在后 续用户继续访问时由 WEB Cache来替代原始内容提供商的服务器来传输热 点内容。 緩存特性为 1次存储, 多次输出。 WEB Cache产品的这个特性可 以緩解移动运营商内容缺乏以及网络流量结算费用昂贵的问题。 为了解决 长途传输时延以及长途传输资源扩容压力的问题, WEB Cache的设置可以 是分层设置的,最下一层 WEB Cache要靠近用户,在本地网设置 WEB Cache 可以服务本地用户同时减少了热点内容的长途传输流量, 在区域中心或互 联网出口设置 WEB Cache可以减少长途传输流量并进一步减少跨网流量。 进一步的由于存储产品的发展非常快, 所以应用 WEB Cache技术的核心思 想是用存储换传输, 即使用更便宜的存储来降低运营宽带业务的成本。
基本的 WEB Cache技术目前在互联网上已经广泛使用, 緩存设备可单 独部署也可与各类代理装置、 或网关合设。 在互联网中不同的节点可分别 重复设置緩存设备, 例如: 公司级的代理服务器(PROXY ) 中的代理网关 可以部署 WEB Cache; 城市本地网互联网关口可以部署 WEB Cache; 区域 互联网关口部署 WEB Cache; 运营商互联网关口部署 WEB Cache。 每个緩 存设备通常采用独立部署, 緩存设备之间以及緩存设备与其他网络设备之 间并没有逻辑接口。
现阶段的緩存设备针对网络下所有的用户, 以及所有的业务提供的是 同质化的服务, 在网络运营日益精细化的趋势下, 现有的 WEB Cache技术 限制了运营商提供更精细化定制化的服务。 例如下列业务场景:
业务场景一: 运营商将用户分级为 A、 B、 C类, A为 VIP类高价值用 户, B、 C类用户的价值逐步递减。运营商希望对 A类用户提供定制化的緩 存服务, 例如运营商为每个 VIP用户开设单独的緩存空间, 每个 A类用户 拥有单独的緩存空间, 可以根据用户的访问习惯将热点进行緩存, 对于一 些非大众热点的内容, 不满足系统级的緩存热点门限, 这些内容是不会緩 存在系统整体緩存的,但对于 VIP用户可以緩存到单独个人的緩存空间中。 在 VIP用户重复访问时可以提高用户的访问速度。
业务场景二: 由于緩存向用户输出热点对象的能力是有限的, 即使满 足整体要求的情况下特定热点时间段也可能存在输出能力的不足。 因此在 用户分类的前提下可以优先保证对特定用户的緩存输出, 保证用户的访问 体验。
业务场景三: 緩存作为一种流量的加速服务可以对用户提供包月或带 宽定制服务, 这些都需要关联到用户信息、 以及服务策略, 而现有的緩存 设备自身没有足够的信息来支撑这种分类服务。
业务场景四: 对于综合运营商部署的緩存设备可能同时服务固定宽带 用户和移动宽带用户。 这两类用户的接入方式以及终端的能力差异巨大, 所以对緩存的要求也不同。 台式电脑、 笔记本接入带宽高, 接入网络流量 大, 运营商部署的緩存会对其热点进行緩存, 而对移动用户而言, 流量绝 对值跟固网宽带差多个数量级, 所以同一緩存设备同时服务固定网络和移 动网络时, 移动用户的访问热点会被固定宽带的访问热点淹没, 所以如果 緩存设备可以获取到用户信息, 则对移动用户的热点进行单独统计, 可以 有效的避免这种情况。
综合上述内容可以看出, 现阶段的网络緩存设备提供的是粗放式的服 务, 无法针对不同用户或不同业务提供不同的緩存服务。 发明内容
有鉴于此, 本发明实施例的主要目的在于提供一种基于策略控制的緩 存方法和系统, 能够解决现有的网络緩存设备无法提供有针对性的精细服 务的问题。
为解决上述技术问题, 本发明实施例的技术方案是这样实现的: 本发明实施例提供了一种基于策略控制的緩存方法, 所述方法包括: 分组交换设备将转发数据的用户标识添加到分组数据包中, 并发送给 网络緩存设备;
网络緩存设备提取用户标识, 将所述转发数据的用户标识、 和 /或业务 信息上报给策略控制设备 ( PCRF );
PCRF根据用户标识、 和 /或业务信息关联到对应的緩存业务策略, 将 所述緩存业务策略发送给网络緩存设备;
网络緩存设备根据所述緩存业务策略执行緩存操作; 或者,
网络緩存设备提取用户标识, 将所述转发数据的用户标识、 和 /或业务 添加到分组数据包中;
网络緩存设备根据緩存业务策略执行緩存操作 , 所述緩存业务策略是 由 PCRF根据用户标识、 和 /或业务信息关联到对应的緩存业务策略并发送 给网络緩存设备。
其中, 所述网络緩存设备根据所述緩存业务策略执行緩存操作之后, 所述方法, 还包括:
当网络緩存设备检测到转发数据的业务发生变化时, 从 PCRF重新获 取更新的緩存业务策略, 执行緩存操作; 或者
当 PCRF 中的緩存业务策略发生变化时, 将更新的緩存业务策略发送 给网络緩存设备, 网络緩存设备执行緩存操作。
其中, 所述分组交换设备将转发数据的用户标识添加到分组数据包中, 具体为:
在分组数据包的包头部分增加用户标识的标签, 以及用户标识, 其中, 所述用户标识包括: 移动用户综合业务数字网号码(MSISDN )、 或国际移 动用户识别码(IMSI )。
其中, 在网络緩存设备提取用户标识之前, 所述方法, 还包括: 在网络緩存设备对转发数据进行重组分析时, 网络緩存设备检测分组 数据包中是否包含用户标识的标签, 如果没有, 则终止本方法流程, 如果 有则判断基于緩存业务策略控制的緩存操作是否激活, 如果已经激活, 则 提取用户标识; 如果尚未激活, 则终止本方法流程。
其中, 所述网络緩存设备将所述转发数据的用户标识、 和 /或业务信息 上才艮给 PCRF, 具体为: 根据本地保存的 PCRF地址, 向 PCRF发起会话建 立请求, 所述会话建立请求中携带所述用户标识、 和 /或业务信息; 所述 PCRF将所述緩存业务策略发送给网络緩存设备, 具体为: PCRF 将所述緩存业务策略携带在会话建立响应中, 发送给网络緩存设备。
本发明实施例还提供了一种基于策略控制的緩存系统, 所述系统包括: 分组交换设备、 网络緩存设备和 PCRF; 其中,
所述分组交换设备, 用于将转发数据的用户标识添加到分组数据包中, 并发送给网络緩存设备;
所述网络緩存设备, 用于提取用户标识, 将所述转发数据的用户标识、 和 /或业务信息上报给 PCRF, 根据所述 PCRF发送来的緩存业务策略执行 緩存操作;
所述 PCRF, 用于根据用户标识、 和 /或业务信息关联到对应的緩存业 务策略, 将所述緩存业务策略发送给网络緩存设备。
其中, 所述网络緩存设备, 还用于在根据所述緩存业务策略执行緩存 操作之后, 当网络緩存设备检测到转发数据的业务发生变化时, 从 PCRF 重新获取更新的緩存业务策略, 执行緩存操作;
所述 PCRF, 还用于在根据所述緩存业务策略执行緩存操作之后, 当 PCRF中的緩存业务策略发生变化时,将更新的緩存业务策略发送给网络緩 存设备, 网络緩存设备执行緩存操作。
其中, 所述分组交换设备将转发数据的用户标识添加到分组数据包中, 具体为:
在分组数据包的包头部分增加用户标识的标签, 以及用户标识, 其中, 所述用户标识包括: MSISDN、 或 IMSI。
其中, 所述网络緩存设备, 还用于在提取用户标识之前, 在对转发数 据进行重组分析时, 检测分组数据包中是否包含用户标识的标签, 如果没 有, 则按照现有技术操作, 如果有则判断基于緩存业务策略控制的緩存操 作是否激活, 如果已经激活, 则提取用户标识。
其中, 所述网络緩存设备将所述转发数据的用户标识、 和 /或业务信息 上才艮给 PCRF, 具体为: 根据本地保存的 PCRF地址, 向 PCRF发起会话建 立请求, 所述会话建立请求中携带所述用户标识、 和 /或业务信息;
所述 PCRF将所述緩存业务策略发送给网络緩存设备, 具体为: PCRF 将所述緩存业务策略携带在会话建立响应中, 发送给网络緩存设备。
本发明实施例所提供的基于策略控制的緩存方法和系统, 分组交换设 备将转发数据的用户标识添加到分组数据包中, 并发送给网络緩存设备; 网络緩存设备提取用户标识, 将所述转发数据的用户标识、 和 /或业务信息 上报给 PCRF; PCRF根据用户标识、 和 /或业务信息关联到对应的緩存业务 策略, 将所述緩存业务策略发送给网络緩存设备; 网络緩存设备根据所述 緩存业务策略执行緩存操作。 这样使得网络緩存设备不再独立运作, 可与 分组网络结合, 基于 PCRF 中定义的不同策略对用户提供定制化的緩存服 务。 可以对不同级别用户、 和 /或不同级别业务提供交互式的定制化緩存服 务。 附图说明
图 1为本发明实施例所涉及的网络架构示意图;
图 2为本发明实施例一种基于策略控制的緩存方法流程示意图; 图 3为本发明一种基于策略控制的緩存方法的具体实施例流程示意图; 图 4为本发明实施例一种基于策略控制的緩存系统结构示意图。 具体实施方式
为了更好的理解本发明首先介绍一下本发明涉及的网络架构, 图 1 为 本发明实施例所涉及的网络架构示意图, 如图 1所示, 所述网络中, 包括: 分组交换设备 11、 策略控制设备(PCRF ) 12和网络緩存设备 13; 其中, 分组交换设备 11 , 例如移动网络中的 GGSN等, 负责宽带用户的接入分组 网络, 并将用户流量接入到互联网。 策略控制设备 12、 即 PCRF, 在 3GPP 中定义, 其负责策略控制于计费, PCRF12跟分组交换设备 11之间有标准 的 Gx接口。分组交换设备 11上报用户业务到 PCRF12, 由 PCRF12对不同 的业务确定执行不同的策略。 网络緩存设备 13一般部署在分组网络的汇聚 层面, 在分组交换设备 11到互联网出口之间。 现有技术中网络緩存设备 13 与 PCRF12之间没有接口。
本发明实施例的基本思想是: 分组交换设备将转发数据的用户标识添 加到分组数据包中, 并发送给网络緩存设备; 网络緩存设备提取用户标识, 将所述转发数据的用户标识、 和 /或业务信息上报给 PCRF; PCRF根据用户 标识、 和 /或业务信息关联到对应的緩存业务策略, 将所述緩存业务策略发 送给网络緩存设备; 网络緩存设备根据所述緩存业务策略执行緩存操作。
下面结合附图和具体实施例对本发明的技术方案进一步详细阐述。 图 2为本发明实施例一种基于策略控制的緩存方法流程示意图,如图 2 所示, 所述方法包括以下步驟:
步驟 201 , 分组交换设备将转发数据的用户标识添加到分组数据包中, 并发送给网络緩存设备;
具体的, 所述分组交换设备将转发数据的用户标识添加到分组数据包 中, 具体为: 在分组数据包的包头部分增加用户标识的标签、 以及用户标 识。 所述用户标识的标签用于表示是否具有用户标识, 如果有用户标识的 标签则说明携带了用户标识, 如果没有则说明未携带用户标识。 所述用户 标识包括: 移动用户综合业务数字网号码(MSISDN )、 或国际移动用户识 别码(IMSI )。
步驟 202, 网络緩存设备提取用户标识, 将所述转发数据的用户标识、 和 /或业务信息上报给 PCRF; 具体的, 网络緩存设备中还配置了 PCRF的地址, 用于上报用户标识、 和 /或业务信息时使用。 所述网络緩存设备将所述转发数据的用户标识、 和 / 或业务信息上报给 PCRF, 具体为: 根据本地保存的 PCRF地址, 向 PCRF 发起会话建立请求, 所述会话建立请求中携带所述用户标识、 和 /或业务信 步驟 203 , PCRF根据用户标识、和 /或业务信息关联到对应的緩存业务 策略, 将所述緩存业务策略发送给网络緩存设备;
具体的, 所述 PCRF将所述緩存业务策略发送给网络緩存设备, 具体 为: PCRF将所述緩存业务策略携带在会话建立响应中, 发送给网络緩存设 备。 所述緩存业务策略, 包括: 緩存容量、 和 /或总体緩存下载速率、 和 / 或不同类型业务緩存下载速率、 和 /或緩存服务时间。
步驟 204, 网络緩存设备根据所述緩存业务策略执行緩存操作。
需要说明的是, 为了实现本发明实施例, 网络緩存设备和 PCRF之间 还需要添加一个用于传输消息的接口, 所述网络緩存设备和 PCRF之间的 接口, 与现有的所述分组交换设备和 PCRF之间的接口类似。
进一步的, 在步驟 201之前, 所述方法, 还包括: 分组交换设备判断 本网络是否支持基于緩存业务策略控制的緩存操作 , 如果支持则执行步驟 201 , 即分组交换设备将转发数据的用户标识添加到分组数据包中; 如果不 支持, 则终止本方法流程。 终止本方法流程后, 可以按照现有技术进行后 续操作。
进一步的, 在步驟 202 中, 网络緩存设备提取用户标识之前, 所述方 法, 还包括: 在网络緩存设备对转发数据进行重组分析时, 网络緩存设备 检测分组数据包中是否包含用户标识的标签, 如果没有, 则终止本方法流 程, 如果有则判断基于緩存业务策略控制的緩存操作是否激活, 如果已经 激活, 则提取用户标识; 如果尚未激活, 则终止本方法流程。 终止本方法 流程后, 可以按照现有技术进行后续操作。
进一步的, 在步驟 204 中, 所述网络緩存设备根据所述緩存业务策略 执行緩存操作之后, 所述方法, 还包括: 网络緩存设备检测到转发数据的 业务发生变化时, 从 PCRF重新获取更新的緩存业务策略, 执行緩存操作; 或者当 PCRF 中的緩存业务策略发生变化时, 将更新的緩存业务策略发送 给网络緩存设备, 网络緩存设备执行緩存操作。
具体的, 所述业务发生变化, 包括: 新业务开始、 或业务停止、 或下 载流量达到门限。 所述网络緩存设备从 PCRF重新获取更新的緩存业务策 略, 包括: 所述网络緩存设备利用业务信息通知请求, 将变化后的业务信 息发送给 PCRF; PCRF利用业务信息通知响应, 将更新的緩存业务策略发 送给网络緩存设备。 所述当 PCRF 中的緩存业务策略发生变化时, 将更新 的緩存业务策略发送给网络緩存设备, 具体为: PCRF利用策略更新请求, 将更新的緩存业务策略发送给网络緩存设备。 进一步的, 网络緩存设备执 行緩存操作之后, 还包括: 所述网络緩存设备向 PCRF返回策略更新响应。
图 3为本发明一种基于策略控制的緩存方法的具体实施例流程示意图, 如图 3所示, 所述分组交换设备为 GGSN, 所述网络緩存设备为 CACHE, 所述策略控制设备为 PCRF, 所述流程包括:
步驟 301 , GGSN在分组网络中负责将分组接入网与互联网之间分组流 量的双向路由功能, 分组用户从蜂窝网络接入后经由 GPRS服务支持节点 ( SGSN )后接入 GGSN, GGSN中存有用户信息,其中包括 MSISDN、 IMSI 等。 GGSN判断本网络是否支持本专利所描述的基于策略控制的緩存功能, 如果不支持处理同现有技术, 如果支持 GGSN在转发用户数据流量到互联 网时在分组包的包头中携带用户标识, 比如 MSISDN、 IMSI。 分组包头中 增加自定义用户标识的标签、 以及用户标识。 有用户标识标签时表示有用 户标识, 无用户标签则无用户标识; 步驟 302 , CACHE串行布置在网络中, 收到 GGSN与互联网之间的双 向分组报文时进行 CACHE设备的基础处理, 包括: 分组报文重组、 深度报 文检测等, CACHE判断本网络是否支持基于策略的緩存控制, 如果支持基 于緩存的策略控制还需要配置本地分组网络的 PCRF 地址。 CACHE 对 GGSN侧发向互联网的报文进行重组分析时判断是否包含用户标识, 并进 行如下处理:
如果未包含用户标识, 则 CACHE处理同现有技术, 不触发与 PCRF 的交互;
如果包含用户标识, 但本地配置为未激活基于策略的緩存控制, 则 CACHE不触发与 PCRF的交互, 并在向互联网侧转发分组报文时需要去除 用户标识的分组报文头。
如果包含用户标识, 本地配置为支持基于策略的緩存控制, 则 CACHE 向本地记录的 PCRF地址发起到 PCRF的会话建立请求,会话请求中包含但 不限于用户标识 MSISDN或 IMSI, 标识当前分组业务流的标识。
步驟 303, PCRF收到 CACHE发起的会话建立请求,根据请求中包含 的用户标识和业务标识关联用户开户信息并决定本次业务的策略, PCRF将 当前策略相关的信息通过会话建立响应下发到 CACHE, 包括但不限于緩存 容量、 和 /或总体緩存下载速率、 和 /或不同类型业务緩存下载速率、 和 /或緩 存服务时间, CACHE设备收到后执行;
步驟 304, 如果 CACHE检测到业务变化, 例如: 新业务开始、 或业务 停止、 或下载流量达到门限等緩存事件, 通过业务信息通知请求通知给 PCRF;
步驟 305, PCRF收到决定相关策略, 并通过业务信息通知响应将当前 策略通知 CACHE, CACHE收到后执行;
步驟 306, 如果 PCRF由于其他事件触发引起策略发生变化时, 主动向 CACHE设备发起策略更请求, 携带当前的策略信息;
步驟 307 , CACHE收到后执行, 并返回更新响应。
图 4为本发明实施例一种基于策略控制的緩存系统结构示意图,如图 4 所示, 所述系统包括: 分组交换设备 41、 网络緩存设备 42和 PCRF43; 其 中,
所述分组交换设备 41 , 用于将转发数据的用户标识添加到分组数据包 中, 并发送给网络緩存设备 42; 包中, 具体为: 在分组数据包的包头部分增加用户标识的标签、 以及用户 标识。 所述用户标识的标签用于表示是否具有用户标识, 如果有用户标识 的标签则说明携带了用户标识, 如果没有则说明未携带用户标识。 所述用 户标识包括: MSISDN、 或 IMSI。
所述网络緩存设备 42, 用于提取用户标识, 将所述转发数据的用户标 识、 和 /或业务信息上报给 PCRF43, 根据所述 PCRF43发送来的緩存业务 策略执行緩存操作;
具体的, 网络緩存设备 42中还配置了 PCRF43的地址, 用于上报用户 标识、和 /或业务信息时使用。 所述网络緩存设备 42将所述转发数据的用户 标识、 和 /或业务信息上报给 PCRF43, 具体为: 根据本地保存的 PCRF43 地址, 向 PCRF43发起会话建立请求, 所述会话建立请求中携带所述用户 标识、 和 /或业务信息。
所述 PCRF43 , 用于根据用户标识、 和 /或业务信息关联到对应的緩存 业务策略, 将所述緩存业务策略发送给网络緩存设备 42。
具体的, 所述 PCRF43将所述緩存业务策略发送给网络緩存设备 42, 具体为: PCRF43将所述緩存业务策略携带在会话建立响应中, 发送给网络 緩存设备 42。 所述緩存业务策略, 包括: 緩存容量、 和 /或总体緩存下载速 率、 和 /或不同类型业务緩存下载速率、 和 /或緩存服务时间。
需要说明的是, 为了实现本发明实施例, 网络緩存设备 42和 PCRF43 之间还需要添加一个用于传输消息的接口,所述网络緩存设备 42和 PCRF43 之间的接口, 与现有的所述分组交换设备 41和 PCRF43之间的接口类似。
进一步的, 所述分组交换设备 41 , 还用于在将转发数据的用户标识添 加到分组数据包中之前, 判断本网络是否支持基于緩存业务策略控制的緩 存操作, 如果支持则将转发数据的用户标识添加到分组数据包中; 如果不 支持, 则按照现有技术操作。
进一步的, 所述网络緩存设备 42, 还用于在提取用户标识之前, 在对 转发数据进行重组分析时, 检测分组数据包中是否包含用户标识的标签, 如果没有, 则按照现有技术操作, 如果有则判断基于緩存业务策略控制的 緩存操作是否激活, 如果已经激活, 则提取用户标识; 如果尚未激活, 则 按照现有技术操作。
进一步的, 所述网络緩存设备 42, 还用于在根据所述緩存业务策略执 行緩存操作之后, 当网络緩存设备 42检测到转发数据的业务发生变化时, 从 PCRF43重新获取更新的緩存业务策略, 执行緩存操作。
具体的, 所述业务发生变化, 包括: 新业务开始、 或业务停止、 或下 载流量达到门限。 所述网络緩存设备 42从 PCRF43重新获取更新的緩存业 务策略, 包括: 所述网络緩存设备 42利用业务信息通知请求, 将变化后的 业务信息发送给 PCRF43; PCRF43利用业务信息通知响应, 将更新的緩存 业务策略发送给网络緩存设备 42。
进一步的, 所述 PCRF43, 还用于在根据所述緩存业务策略执行緩存操 作之后, 当 PCRF43 中的緩存业务策略发生变化时, 将更新的緩存业务策 略发送给网络緩存设备 42 , 网络緩存设备 42执行緩存操作。
具体的, 所述当 PCRF43 中的緩存业务策略发生变化时, 将更新的緩 存业务策略发送给网络緩存设备 42, 具体为: PCRF43利用策略更新请求, 将更新的緩存业务策略发送给网络緩存设备 42。 进一步的, 网络緩存设备 42执行緩存操作之后, 还包括: 所述网络緩存设备 42向 PCRF43返回策略 更新响应。
本发明实施例还公开了一种装置, 用于实施上述网络緩存设备所执行 的方法。
以上所述, 仅为本发明的较佳实施例而已, 并非用于限定本发明的保 护范围。

Claims

权利要求书
1、 一种基于策略控制的緩存方法, 其特征在于, 所述方法包括: 分组交换设备将转发数据的用户标识添加到分组数据包中, 并发送给 网络緩存设备;
网络緩存设备提取用户标识, 将所述转发数据的用户标识、 和 /或业务 信息上报给策略控制设备 ( PCRF );
PCRF根据用户标识、 和 /或业务信息关联到对应的緩存业务策略, 将 所述緩存业务策略发送给网络緩存设备;
网络緩存设备根据所述緩存业务策略执行緩存操作。
2、 根据权利要求 1所述的方法, 其特征在于, 所述网络緩存设备根据 所述緩存业务策略执行緩存操作之后, 所述方法, 还包括:
当网络緩存设备检测到转发数据的业务发生变化时, 从 PCRF重新获 取更新的緩存业务策略, 执行緩存操作; 或者
当 PCRF 中的緩存业务策略发生变化时, 将更新的緩存业务策略发送 给网络緩存设备, 网络緩存设备执行緩存操作。
3、 根据权利要求 1或 2所述的方法, 其特征在于, 所述分组交换设备 将转发数据的用户标识添加到分组数据包中, 具体为:
在分组数据包的包头部分增加用户标识的标签, 以及用户标识, 其中, 所述用户标识包括: 移动用户综合业务数字网号码(MSISDN )、 或国际移 动用户识别码(IMSI )。
4、 根据权利要求 3所述的方法, 其特征在于, 在网络緩存设备提取用 户标识之前, 所述方法, 还包括:
在网络緩存设备对转发数据进行重组分析时, 网络緩存设备检测分组 数据包中是否包含用户标识的标签, 如果没有, 则终止本方法流程, 如果 有则判断基于緩存业务策略控制的緩存操作是否激活, 如果已经激活, 则 提取用户标识; 如果尚未激活, 则终止本方法流程。
5、 根据权利要求 1或 2所述的方法, 其特征在于, 所述网络緩存设备 将所述转发数据的用户标识、 和 /或业务信息上报给 PCRF, 具体为:
根据本地保存的 PCRF地址,向 PCRF发起会话建立请求,所述会话建 立请求中携带所述用户标识、 和 /或业务信息;
所述 PCRF将所述緩存业务策略发送给网络緩存设备, 具体为: PCRF 将所述緩存业务策略携带在会话建立响应中, 发送给网络緩存设备。
6、 一种基于策略控制的緩存系统, 其特征在于, 所述系统包括: 分组 交换设备、 网络緩存设备和 PCRF; 其中,
所述分组交换设备, 用于将转发数据的用户标识添加到分组数据包中, 并发送给网络緩存设备;
所述网络緩存设备, 用于提取用户标识, 将所述转发数据的用户标识、 和 /或业务信息上报给 PCRF, 根据所述 PCRF发送来的緩存业务策略执行 緩存操作;
所述 PCRF, 用于根据用户标识、 和 /或业务信息关联到对应的緩存业 务策略, 将所述緩存业务策略发送给网络緩存设备。
7、 根据权利要求 6所述的系统, 其特征在于, 所述网络緩存设备, 还 用于在根据所述緩存业务策略执行緩存操作之后, 当网络緩存设备检测到 转发数据的业务发生变化时, 从 PCRF重新获取更新的緩存业务策略, 执 行緩存操作;
所述 PCRF, 还用于在根据所述緩存业务策略执行緩存操作之后, 当 PCRF中的緩存业务策略发生变化时,将更新的緩存业务策略发送给网络緩 存设备, 网络緩存设备执行緩存操作。
8、 根据权利要求 6或 7所述的系统, 其特征在于, 所述分组交换设备 将转发数据的用户标识添加到分组数据包中, 具体为: 在分组数据包的包头部分增加用户标识的标签, 以及用户标识, 其中, 所述用户标识包括: MSISDN、 或 IMSI。
9、 根据权利要求 8所述的系统, 其特征在于, 所述网络緩存设备, 还 用于在提取用户标识之前, 在对转发数据进行重组分析时, 检测分组数据 包中是否包含用户标识的标签, 如果没有, 则按照现有技术操作, 如果有 则判断基于緩存业务策略控制的緩存操作是否激活, 如果已经激活, 则提 取用户标识。
10、 根据权利要求 6或 7所述的系统, 其特征在于, 所述网络緩存设 备将所述转发数据的用户标识、 和 /或业务信息上报给 PCRF, 具体为: 根 据本地保存的 PCRF地址,向 PCRF发起会话建立请求,所述会话建立请求 中携带所述用户标识、 和 /或业务信息;
所述 PCRF将所述緩存业务策略发送给网络緩存设备, 具体为: PCRF 将所述緩存业务策略携带在会话建立响应中, 发送给网络緩存设备。
11、 一种基于策略控制的緩存方法, 其特征在于, 所述方法包括: 网络緩存设备提取用户标识, 将所述转发数据的用户标识、 和 /或业务 添加到分组数据包中;
网络緩存设备根据緩存业务策略执行緩存操作 , 所述緩存业务策略是 由 PCRF根据用户标识、 和 /或业务信息关联到对应的緩存业务策略并发送 给网络緩存设备。
12、 根据权利要求 11所述的方法, 其特征在于, 所述网络緩存设备根 据所述緩存业务策略执行緩存操作之后, 所述方法, 还包括:
当网络緩存设备检测到转发数据的业务发生变化时, 从 PCRF重新获 取更新的緩存业务策略, 执行緩存操作; 或者
当 PCRF 中的緩存业务策略发生变化时, 将更新的緩存业务策略发送 给网络緩存设备, 网络緩存设备执行緩存操作。
13、 根据权利要求 11或 12所述的方法, 其特征在于, 所述分组交换 设备将转发数据的用户标识添加到分组数据包中, 具体为:
在分组数据包的包头部分增加用户标识的标签, 以及用户标识, 其中, 所述用户标识包括: MSISDN、 或 IMSI。
14、 根据权利要求 13所述的方法, 其特征在于, 在网络緩存设备提取 用户标识之前, 所述方法, 还包括:
在网络緩存设备对转发数据进行重组分析时, 网络緩存设备检测分组 数据包中是否包含用户标识的标签, 如果没有, 则终止本方法流程, 如果 有则判断基于緩存业务策略控制的緩存操作是否激活, 如果已经激活, 则 提取用户标识; 如果尚未激活, 则终止本方法流程。
15、 根据权利要求 11或 12所述的方法, 其特征在于, 所述网络緩存 设备将所述转发数据的用户标识、 和 /或业务信息上报给 PCRF, 具体为: 根据本地保存的 PCRF地址,向 PCRF发起会话建立请求,所述会话建 立请求中携带所述用户标识、 和 /或业务信息;
所述 PCRF将所述緩存业务策略发送给网络緩存设备, 具体为: PCRF 将所述緩存业务策略携带在会话建立响应中, 发送给网络緩存设备。
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