CN103299598B - Packet-switched telecommunication network edge to notice cache - Google Patents
Packet-switched telecommunication network edge to notice cache Download PDFInfo
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- CN103299598B CN103299598B CN201180064665.3A CN201180064665A CN103299598B CN 103299598 B CN103299598 B CN 103299598B CN 201180064665 A CN201180064665 A CN 201180064665A CN 103299598 B CN103299598 B CN 103299598B
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Abstract
Disclose method from notice to subscriber equipment and the access server for distributing being operated in packet-switched telecommunication network (such as based on Internet protocol voice (VoIP) network).The method includes: receives from source of media and notices, and receives for allowing noticing the cache instruction being cached from source of media, and sends the notice received to subscriber equipment.Notice can be cached in the cache element being associated with access server by access server when receiving cache instruction and noticing.Furthermore disclosed method and the source of media for generating the cache instruction noticing and allowing access server that notice is cached with access server cooperation.
Description
Technical field
The present invention relates to the method for sending notice in packet-switched telecommunication network and access server, for point
Group switched message network generates method and the source of media of notice.
Background technology
It is said that in general, when at packet-switched telecommunication network (such as, IMS network or voice based on Internet protocol (VoIP)
Network) in when setting up calling, or when building from another network (such as, circuit-switched network, the most wired or mobile telecom network)
During vertical calling, calling party is connected to network via borde gateway.As the subscriber that calling party is packet switching network, then this border
Gateway constitutes the interface (UNI) of user-to-network, such as Proxy Call Session Control Function (P-CSCF) in IMS network and
Access gateway.When calling party belongs to another (IMS) network, then this borde gateway defines the interface (NNI) of network-to-network,
Such as, MGCF (MGCF) adds IMS WMG (IMS-MGW).
When call setup or calling release request source of media generate and notice and during to this notice of calling party's streaming, will with
From media entities to the user device transmissions media of calling party in family plane (that is, transmitting the plane of media).Such as:
-source of media (such as Multimedia resource function processor (MRFP) (MRFP)) can be noticed with streaming, and wherein, MRFP is many matchmakers
Body Resource Function Controller (MRFC) controls lower action.Depend on calling party, gateway can be accessed to IM-MGW from MRFP to IMS
Or send media packet to transfer gateway (TrGW), or
-streaming standard voicemail welcome message can be come by voice-mail system.Connect to IMS from voice-mail system
Function Access Gateway, IM-MGW or TrGW send media packet, or
-can from content system to the content of the subscriber equipment streaming of calling party such as personalized speech etc, as
Notice.
Central storage system in packet-switched telecommunication network keeps pre-recorded notice, and can be when needed
This pre-recorded notice is distributed to end user.The example of this notice can be to carry to calling subscriber during call setup
To calling subscriber, the notice of confession, to notify that callee is unreachable.
Per call requires when a side (typically calling party) streaming that serviced is noticed, it is desirable in the network from
Be particularly suitable for generate notice source of media to network boundary and from network boundary to the side's subscriber equipment streaming serviced
Pre-recorded notice.
Require to notice in view of a large amount of calling partys, it is necessary to big to these calling party's streaming by packet-switched telecommunication network
The pre-recorded notice of amount.The most a lot of this calling partys may require identical notice.Therefore, with high-repetition-rate to network
The Media Stream that each media network node-node transmission borderline is identical.To this frequent streaming constituting the identical data noticed
Unnecessarily consume network capacity and should be avoided by.
Summary of the invention
Therefore target is to alleviate at least some disadvantages mentioned above and provide the notice improved in packet-switched telecommunication network to generate
And distribution.
A kind of favorable method sending notice to subscriber equipment carried out by access server, described access server works
In packet-switched telecommunication network.Described method includes: receive described from the source of media worked described packet switching network
Notice；Receive the cache instruction being associated with described notice from described source of media, it indicates and is used for allowing described access service
Device initializes the instruction of the cache to described notice；And connecing with described in response to received cache instruction
Enter in the cache element that server is associated and described notice is cached.
Described cache instruction trigger described access server allow receive described cache instruction time pair
Described notice is cached.The cache of described notice can be occurred described to the transmission of described subscriber equipment
During notice.If be cached described notice, it can be used in the time after a while to same user device or communication connection
Another subscriber equipment to described access server retransmits.From another part not being close to described network boundary of described network
Source of media send for allow described notice is cached described cache instruction.By to described notice into
Row cache, when asking described access server to resend described notice to described subscriber equipment, is no longer required for described
The announcement media noticed or be associated with described notice flowed through described network from described source of media to described access server, institute
State the announcement media stream noticed or be associated with described notice require Internet resources and spend the transmission time.
Described method also includes: receive described in send cache to described subscriber equipment from described source of media
The instruction noticed, the notice of cache and sending to described subscriber equipment described in retrieval from described cache element
The notice of the cache retrieved.
This makes described source of media can send for sending cache to subscriber equipment to described access server
The instruction of notice.To this end, described access server is retrieved slow at a high speed from described cache element according to described instruction
The notice deposited, and the notice retrieved is sent to described subscriber equipment.The instruction being cached described notice can have
Form to the list of the notice of the cache of source of media offer.Described source of media can ask described access server to be sent out
Send at least one instruction noticed available in described cache element.When to when noticing successfully cache, described
Access server can also provide at least one instruction noticed available in described cache element, or sends out to responsible
The application server playing described notice sends at least one instruction noticed available in described cache element.
By receive from described source of media for the instruction sending the notice of cache time to described use
Family equipment sends the notice retrieved, and indeed achieves the saving to Internet resources.Described cache element is preferably
The part of described access server or be positioned near described access server, its preferably with quick connecting link to described in connect
Enter server.
In an embodiment, the instruction of described cache is embedded in announcement media stream by described source of media in advance, described notice
From this source of media.Described method also includes: extract the instruction of described cache from described announcement media stream.This has following
Advantage: be responsible for processing the access server of described notice in single message, " announcement media stream ", the described notice of middle reception and described
Cache indicates.
In another embodiment, described method includes: extracts from described cache indicates and notices identifier.Alternative
Ground, can be extracted described notice identifier by described access server from described announcement media stream.Then described notice is used
Identifier performs the cache to described notice, to identify the notice of cache.By the described notice of responsible transmission
Source of media includes described notice identifier in the instruction of described cache.For standardized notice to be used, this allows
For noticing the convention of identification in described packet switching network.This also allows for the weight to the identical notice being derived from various source of media
Multiple use.Notice identifier can also include indicating described notice from the part of described source of media.This allows cache
Notice and be associated with source of media especially.
In an embodiment, described method also includes: send described in described cache element to described source of media
The instruction noticed.It is thus possible to allow described source of media recognize described notice in the caches.
Send the step to the instruction of the described notice in described cache element to described source of media to include: from application
Server receives for carrying out media transmission to described subscriber equipment and carrying out the money of media transmission from described subscriber equipment
Source carries out the request reserved, and sends at described cache list to described application server upon receipt of the request
The instruction of notice available in unit.Described application server can provide at described cache list with backward described source of media
At least one instruction noticed available in unit.
So, to described source of media, described access server notifies that notice has been carried out cache by it, it is allowed to described matchmaker
Body source generates this notice when being instructed to, to avoid again to the described notice of transmission of described access server, but instead
Described notice is sent from cache to the instruction of described access server.Which save transmission time and Internet resources.
In an embodiment, in the caches can the list of notice include described instruction, described cache can
To communicate with described source of media, it is allowed to described source of media recognizes all available notices.
In another embodiment, described access server extract from the instruction for sending notice and notice identifier,
And use described notice identifier to retrieve corresponding notice from described cache element.This facilitate that described access server
From described cache element, the easy of described notice is retrieved.
Proposed method makes it possible to by source of media to generate notice, and described source of media is operated in packet-switched telecommunications net
In network, such as VoIP or IMS network.Described method includes: receives and generates the first instruction noticed, at the described packet switching network
The access server that works in network sends described notice, generates and sends to described access server and is associated with described notice
Cache indicates, to allow described access server to institute in the cache element being associated with described access server
State notice to be cached.
Thus described source of media and described access server are cooperated in the sense: described source of media provides will be by
Described notice that described access server is distributed and allow described access server that described notice is cached
Described instruction, can be cached for using in the future notice by described access server.
Described method also includes: described source of media receives the instruction to notice available in described cache element,
Receive the second instruction for generating described notice, and described source of media can send for described master to access server
The subscriber equipment being subscriber sends the instruction of the notice of cache.This also avoids described to the distribution of described subscriber equipment
Before notice, described notice has to pass through described network from described source of media to described access server, instead can be by described
Access server directly transmits described notice from described cache element.
In an embodiment, in the caches can the list of notice include described instruction, carry from described list
Take described instruction.
In an embodiment, the step to the access server described notice of transmission includes: send described in announcement media stream
Notice, and the step sending the instruction of described cache includes: in described announcement media stream, embed described cache refer to
Show.
Provide the advantage that and described notice and described instruction are sent as single entities and receives.
In another embodiment, described source of media is from the described instruction to notice available described cache element
The identifier of the middle notice obtaining corresponding cache.Described source of media will be described in described access server sends
The identifier noticed includes in the instruction.Described identifier can such as by described access server with instruction at described height
In speed buffer unit, the form of the list of the identifier of available notice provides.The most described source of media uses described identifier
Described access server is indicated to send, to described subscriber equipment, the institute identified by described identifier from described cache element
State notice.
The method proposed makes application server can control access server when distribution is noticed, and the described of use should
Work in packet-switched telecommunication network with server and described access server, such as VoIP or IMS network.Described method bag
Include: receive setup requests from subscriber equipment, determine the notice relevant to described setup requests, from described access service
Device receives the instruction to notice available in described cache element, and forwards described instruction to source of media and be used for
Generate the instruction of described notice.This allow described source of media described notice the most in the caches time determine that it must be to association
Access server streaming described in notice and cache instruction, or when described notice in the caches time determine that it can
To provide for from the instruction noticed described in cache streaming to described access server.
In another embodiment, said method comprising the steps of: described application server is receiving described call setup
Sending request to described access server during vertical request, described request carries out media for the subscriber equipment initiating call setup
Transmit and carry out media transmission from described subscriber equipment and ask reserved resource.In response to this, described access server provides
To at least one instruction noticed available in described cache element, the list of the notice of cache the most.This permits
Permitted described application server to obtain the understanding forwarding the notice of cache to described source of media.
The method proposed makes media source controller can control source of media, the described media of use when providing and noticing
Source controller and described source of media are operated in packet-switched telecommunication network, such as VoIP or IMS network, and wherein, notice includes
Announcement media stream.Said method comprising the steps of: receive for generating and send to access server the request noticed, described
Request includes the instruction at least one notice available in described cache element from described access server, with
And forward described request as instruction, described instruction include arriving described source of media in the caches can at least one
The described instruction of individual notice.Indicating described source of media in response to the event of such as setup requests etc to described access
Server provides in the case of noticing, and this allows described source of media to recognize the notice in cache.Can be by described instruction
Embed in the instruction.
Propose the access server worked in the packet-switched telecommunication network of such as VoIP or IMS network etc, use
In noticing to subscriber equipment distribution.Described subscriber equipment can reside in circuit switching (CS) network, and calling is at described point
Group exchange network terminates.IMS(VoIP taken on by described access server) WMG between territory and CS territory.Described access takes
Business device includes: processing unit, for the memorizer of described processing unit cooperation and communication unit, described communication unit is used for
It is communicatively connected to (i) subscriber equipment, the (ii) source of media being the most all operated in described packet switching network and (iii)
Application server and be (iv) associated with described access server for the cache list that is cached of notice
Unit.Described communication unit includes: notice and that be associated with described notice, for allowing described for receiving for receiving
Notice be cached cache instruction receiver, for described subscriber equipment send received notice send out
Penetrate machine.Described access server also includes: cache controls functional module, for receiving described notice and described high speed
During caching instruction, the notice to being received is cached.Described access server is arranged to perform to take with accessing above
Any step of the method that business device is relevant.Described access server is preferably disposed in the entity in IMS network.
Further it is proposed that a kind of source of media for generating notice, described source of media is in use operated in packet switch
In communication network, such as VoIP or IMS network.Described source of media includes: processing unit, for and described processing unit cooperation
Memorizer and communication unit, described communication unit is used for being communicatively connected to and is the most all operated in described packet-switched telecommunications
Media source controller in network and access server.Described communication unit includes: for receiving connecing of the instruction of generation notice
Receipts machine and for described access server send described notice transmitter.Described source of media also includes: be used for generating permission
The described access server cache instruction maker to noticing the cache instruction being cached.Described transmitter
It is also arranged to send the instruction of described cache to described access server.Described source of media is arranged to perform as mentioned above
The step of method.Described source of media is preferably disposed in the entity in IMS network.
Propose for distribution notice time control access server another application server, described application server and
Access server is in use operated in packet-switched telecommunication network, such as VoIP or IMS network.Described application server bag
Include: processing unit and the memorizer of described processing unit cooperation and communication unit, described communication unit communication is connected to user
Equipment, media source controller and access server.
Described communication unit includes: for receiving setup requests and for from described access service from subscriber equipment
Device receives the receiver to which notice instruction in the caches.Described application server also includes: notices and determines unit,
It is arranged to determine when receiving described setup requests and whether to generate notice and generate for generating described notice
Instruction.Described application server also includes: instruction generator, is used for indicating described access server to set for described user
For carrying out media transmission and carrying out media transmission to reserve resource from described subscriber equipment.Described application server also includes: turn
Bill unit, is arranged to obtain the instruction of available notice cache from described access server, and to described media
Source controller forwards described instruction.Described communication unit also includes: transmitter, for send for generate notice instruction and
For sending at least one instruction noticed available in described cache element to described media source controller.
Propose for generate notice time control source of media another media source controller, described media source controller and
Described source of media is in use operated in packet-switched telecommunication network, such as VoIP or IMS network.Described media source controller
Including: processing unit, for the memorizer of described processing unit cooperation, be used for being communicatively connected to source of media and access server
Communication unit.Described communication unit includes: receiver, generates the instruction noticed and for generating accessing for receiving
At least one instruction noticed available in cache element at server.Described media source controller also includes forwarding list
Unit, described retransmission unit is arranged to forward the instruction for generating notice and for generating described to described source of media
The instruction of at least one instruction noticed available in cache element.Described communication unit also includes: transmitter, for
Described source of media sends and generates the instruction noticed and the instruction to notice available in described cache element.
Accompanying drawing explanation
By accompanying drawing that is described below and that invest the application, the present invention will be described.
Fig. 1 shows and generates and the block diagram of distribution according to noticing of prior art.
Fig. 2 is notice generation, cache and the block diagram of transmission of the embodiment according to network.
Fig. 3 is the retrieval of another embodiment according to network and sends the block diagram of the notice of cache.
Fig. 4 is the block diagram of the access server of the embodiment according to network.
Fig. 5 is the block diagram of the source of media of the embodiment according to network.
Fig. 6 is the block diagram of the application server of the embodiment according to network.
Fig. 7 is the block diagram of the media source controller of the embodiment according to network.
Detailed description of the invention
The present invention will be explained further with reference to above-mentioned accompanying drawing.Similar accompanying drawing is employed for feature similar in accompanying drawing
Labelling.In the following description, the realization for IP Multimedia System (IMS) gives example, although equally at it
The packet-switched telecommunication network (such as applying the speech network based on IP agreement of the function equivalent of IMS network) of his type
In realize the present invention.In the description of non-explicit declaration, term calling party and subscriber equipment are all referring to the subscriber equipment of calling party.
Fig. 1 is the block diagram providing and distributing notice according to prior art in packet-switched telecommunication network.Can be as end
End, mobile phone, telephone or for setting up the subscriber equipment 100 of any other equipment of calling via suitable network even
Fetch and set up calling 101.Subscriber equipment 100 may reside within the packet switching network identical with called party subscriber, but also may be used
To reside in another network, such as circuit-switched network or mobile telecom network.Setup requests 101 arrives network boundary
The application server 102 at place.About IMS network entity, application server 102 can be e.g.: agentbased control state controls merit
Can (P-CSCF), access gateway to IMS network, MGCF (MGCF), Interconnected Border control function (IBCF),
Or show user to the interface (UNI) of network or network to any other entity of the interface (NNI) of network.Application server
102 also may indicate that one of foregoing functionalities, agentbased control state control function (S-CSCF) and Session initiation Protocol
(SIP) combination of application server.Application server 102 determines will be to the subscriber equipment 100 of the subscriber serviced or calling party
Streaming is noticed.
Application server 102 is that this sends control message to media source controller 104, and media source controller 104 can be with example
Media resource function controller (MRFC) in this way.Media source controller 104 sends instruction 105, source of media 106 to source of media 106
Can be media resource function point (MRFP) or voice-mail system or any other content system noticed is provided.
Media source controller 104 is the entity controlling source of media 106.Such as, when source of media 106 is MRFP, then media
Source controller 104 is MRFC.Source of media 106 with the form of announcement media stream to the access service associated with application server 102
Device 108 provides pre-recorded notice 107.
Access server 108 can be that IMS accesses gateway, IMS WMG (MGW) or transfer gateway (TrGW), they
Can be respectively associated with P-CSCF, MGCF and IBCF.
Application server 102 integrated access server controls function, to control the access server 108 of association.Application clothes
The combination of business device 102 and access server 108 is referred to as accessing session border gateway (A-SBG).Access server 108 is from matchmaker
Body source 106 receives the subscriber equipment 100 of the backward calling subscriber noticing 107 and distributes notice 110.
Application server 102, media source controller 104, source of media 106 and access server 108 utilize specific protocol to enter
Row communication.In the ims network, signaling such as uses SIP signaling to perform, otherwise media flow transmission is to use real-time Transmission
Agreement (RTP) and RTCP Real-time Transport Control Protocol (RTCP) perform.Streaming notices 107 requirements: from source of media 104 to access
Server 108 and set up RTP Media Stream and RTCP data stream respectively to calling part user equipment 100 from access server 108.
Based on by application server 102 to access server 108 provide 109, the addressing information that exchanged by SIP, come
Foundation is carried the RTP data stream of media (such as, voice or video) and carrying and RTP transmission quality is carried out the message of management and control
RTCP data stream.
Fig. 2 is the block diagram noticed to calling subscriber distribution according to an embodiment of the invention.
As in figure 1, the calling 101 processed by application server 102 set up by the subscriber equipment 100 of calling subscriber.Should
Determine to send to calling subscriber subscriber equipment 100 with server 102 and notice.This can be e.g. about the line to called party subscriber
The notice that road is busy.
Application server 102 sends to media source controller 104 and provides the instruction 103 noticing instruction, media source controller
104 so instruction 105 source of media 106 to subscriber equipment 100 play notice.This instruction can include noticing identifier.Then matchmaker
Body source 106 sends notice 107, preferably sends notice 107 in the announcement media stream to access server 108.Right when starting
During the streaming noticed, source of media 106 indicates by cache instruction 213 should be by access server 108 to this notice
It is cached.So, source of media 106 controls to be cached notice, and wherein, access server 108 performs logical
The actual cache accused.
When announcement media flows to reach access server 108, send logical in another Media Stream 110 to subscriber equipment 100
Accuse 107.When cache instruction 213 and notice 107 have arrived access server 108, and to subscriber equipment 100 streaming
While 110 notice, access server 108 is in the cache element being associated with access server 108 (also referred to as at a high speed
Caching 211) in notice is cached 212a.By sending notice 107 and/or whole or portion to cache 211
The announcement media stream divided performs cache 212a, wherein stores in cache 211.
To noticing and cache instruction arrives access server 108 and to cache 212a various fixed noticed
Time arrange can apply.Alternatively after subscriber equipment 100 streaming 110, notice can be cached 212a.
Cache instruction 213 can also arrive access server 108 before or after being communicated to reach.
Announcement media stream includes noticing 107, and can also include header and telegram end (trailer), the genus that its instruction is noticed
Property, the such as beginning of announcement media stream, stopping, length, codec type etc..Announcement media stream can be in such as header
213 are indicated including cache.
Provide and represent that the unique of particular announcement notices identifier 214.Notice identifier 214 to may also be included in that at a high speed
In caching instruction 213 or announcement media stream.This notice identifier 214 is safeguarded so that access server 108 is high in communication network
Each notice of speed caching is corresponding to this notice identifier 214.
In the ims network, source of media 106 notices 107 to access server 108 streaming in described announcement media stream,
And insert notice being carried out the most slow by access server 108 in a RTP packet relevant to announcement media stream
The cache instruction 213 deposited and (under applicable circumstances) notice identifier 214.Last RTP of announcement media stream
Packet can comprise the instruction completing announcement media stream.Therefore, it is grouped through access as last RTP of announcement media stream
During server 108, access server 108 has determined announcement media stream.
RTP data stream is by associated with it for the RTCP data stream specified.The expression that source of media 106 provides should convection pass
The cache instruction 213 of the instruction that is cached of notice may also be included in that RTCP of this RTCP data stream
In message rather than in a RTP message of RTP data stream.
The notice wanting cache being associated with specific access server 108 need not and single particular media source 106
Relevant, but can from various source of media 106(such as, MRFP as above, Voice Mailbox and media server) connect
Receive.
When notice being cached 212a in cache 211, from RTP Media Stream 107, obtain notice number
According to.The real data of cache can be limited to the pcm encoder voice messaging that carries in RTP message and such as do
The information of the mark of source of media 106 going out contribution etc.(such as, it is generally used for audio call for specific codec type
G.711) carry out first cache 212a to notice, to avoid needing transcoding at access server 108.Need not such as disappearing
The information relevant to the transmission of RTP message of breath numbering etc is cached.Any by from cache 211 streaming
Notice regenerates this information.
Fig. 3 shows and how retrieves from cache 211 after 212b notices to subscriber equipment at access server 108
100 streaming are noticed.
When the subscriber equipment 100 in packet-switched telecommunication network or from the user of outside (such as, adjacent CS network)
When equipment 100 is set up for the calling of the subscriber in packet switching network, will be by application server 102 to packet-switched core network
Net sends setup requests 101.Setup requests 101 can comprise Session Description Protocol (SDP), and this SDP comprises " media
Offer (offer) ", according to prior art, it is also referred to as SDP offer.
Application server 102 determines to send to calling subscriber subscriber equipment 100 to be noticed.
Should be through access service to noticing the relevant media to subscriber equipment 100 streaming for this calling
Device 108.IP address in SDP offer in setup requests is adjusted to access for this purpose by application server 102
The IP address of server 108, to be used for sending notice to subscriber equipment 100 by source of media 106.Meanwhile, application server 102 is pre-
Stay the media connection to subscriber equipment 100 in 109 resources, i.e. access server 108.Access server 108 takes with backward application
Business device 102 sends the instruction 316 relevant to the availability noticing 322 in cache 211.This instruction 316 can include as
Upper described in the caches can the list of unique identifier of notice of cache.Application server 102 to
Media source controller 104 forwards this call or session set-up request 317.Application server 102 is by the list noticing identifier
It is included in the SDP offer of this setup requests.Media source controller 104 sends for playing notice to source of media 106
Instruction 318, thus use instruction 318 send in the caches can notice notice identifier list.
Including that the P-CSCF(as application server 102 combines with S-CSCF and sip application server alternatively),
As including the IMS gateway of access server 108, MRFC and MRFP respectively as media source controller 104 and source of media 106
IMS network in the sense that, in Fig. 3 described below perform step:
(1) the SIP Invite(comprising SDP offer invites) 101 arrival P-CSCF102.
(2) IMS-ALG that comprises in P-CSCF102 selects IMS to access gateway 108 pre-in this IMS accesses gateway 108
Stay 109 resources.This IMS gateway 108 is to the notice of P-CSCF102 report 316 cache.
(3) the SDP offer in the SIP Invite317 being further transmitted in IMS network comprises can in cache 211
The list of notice.
(4) IMS-ALG comprised in P-CSCF102 determines needs streaming to notice, and therefore sends SIP to MRFC104
Invite317.This SIP Invite comprises the SDP offer received from subscriber equipment 100, wherein, comes P-CSCF102
List including the notice of cache.
(5) MRFC104 H.248 add message provides to MRFP106 include selected by this calling at a high speed
The list of the notice of caching is at interior SDP offer.Now, MRFP106 has at IMS access gateway 108 in cache
The instruction of available notice, for streaming particular announcement.
When striding across the list that network boundary sends the notice of cache, this row will not retained in SDP offer
Table.Such as, when SIP Invite strides across P-CSCF to end user, or when Interconnected Border controls function (IBCF), will be from
SDP removes this list.
It is stressed that sending SDP offer in step (3) is the standard method according to prior art.But, SDP wants
About include the list of the notice of cache.This does not affect conventional SIP signaling and SDP offer/answer.By existing sip message
(it has the above-mentioned enhancing to SDP offer, and this enhancing is for including the instruction noticed in cache with existing SDP exchange
Including) notifying for forward signal: the notice of specific cache can use.
Source of media 106 receives to calling part user equipment 100(i.e. from media source controller 104, to access server now
108, the IP address i.e. included at SDP offer) instruction 318 noticed of streaming and comprise must be to master with source of media 106
The unique identifier that the notice of the side's of crying subscriber equipment 100 streaming is associated is in the list of the notice of interior cache.As
Fruit notice identifier in the list, then can from access server 108 rather than from source of media 106 come streaming notice.
Source of media 106 with the form of RTP message to by the access server 108 indicated by the IP address in SDP offer
Send instruction 319, to retrieve the notice 322 of 212b cache from cache 211, and flow to calling part user equipment 100
The notice 322 of the corresponding cache of transmission 321.RTP message comprises and to be retrieved from cache by access server 108
The notice identifier 323 that is associated of notice.Can also embed in instruction 319 and notice identifier 323.Work as media source controller
When 104 instruction source of media 106 stop streaming notice, source of media 106 sends instruction to access server 108 and should stop logical
Accuse the RTP message carrying out streaming.
Whole when noticing when access server 108 streaming, it sends instruction to source of media 106 and completes notice
RTP message.To media source controller 104, source of media 106 notifies that it can normally provide other instructions.Can be at RTP header
In carry and start or stop instruction that streaming noticing and from the finger to the streaming completing notice of access server
Show, but this can also be carried in RTCP message.
As it is shown on figure 3, access server 108 can have the notice of the cache from multiple source of media 106
322, and can be to these notices of a large amount of subscriber flow transmission 321.In packet-switched telecommunication network (i.e. IMS core net), by often
The single beginning message of individual notice and single stopping message being replaced from source of media to the single 24kb/s number of access server 108
According to stream (or depending on other packing densities wanting the media of streaming).
Described below source of media 106 is allowed to recognize available notice alternative at access server 108 high speed caching 211
Method.
When source of media 106 receives to the particular remote IP address belonging to access server 108 from media source controller 104
During the instruction 318 noticed with port numbers streaming, it can send a RTCP message to described remote ip address and port numbers,
Request remote entity (access server 108) reports back to whether required notice can be used in cache element 211.Example
As, media source controller 104 asks source of media 106 streaming to have the notice of unique Id#34.
Whether source of media 106 sends the notice asking to be associated with Id#34 in cache 211 to access server 108
In RTCP message.Access server 108 comprises the notice with Id#34 asked in cache in response to this transmission
Instruction available in 211 is in interior RTCP message.RTCP response message if from access server 108 indicates notice at height
Can use in speed caching 211, then the RTCP that source of media 106 transmission indicates access server 108 to start this particular message of streaming disappears
Breath 319.Otherwise, source of media 106 is by normal use notice streaming 107 as shown in Figure 2.In other words, will be to access server
108 these notices of streaming 107 and to access server 108 send in cache 211 can with cache notice 107
Instruction 213 etc..
For the method, reported the availability of the notice of cache by user plane, it is not required that from media
The SDP of the instruction 318 of source controller 104 includes the list of the notice of cache.Additionally, in this case, pin is passed through
To each notice to send start and stop message and replace and require that resources of core network is for data stream that streaming is noticed.
Other alternatives various can be used for source of media 106 notify in the caches can notice.Such as,
When source of media 106 sends the instruction 213 can being cached notice 107, source of media 106 can be safeguarded at a high speed
The list of the notice of caching.Can use in the caches additionally, access server 108 can provide to source of media 106 regularly
The list of notice.
The maintenance of the notice 322 to cache is described below.
As it has been described above, when particular announcement 107 is for the first time through specific access server 108, if from source of media
When oneth RTP or the RTCP message of 106 so indicates 213, in cache 211, it can be cached
212a.This instruction 213 can also comprise time to live (ttl) value.When the TTL time expires, can be clear from cache 211
Remove the notice 322 of cache.When setting up media links by this access server, noticing will be no longer at a high speed next time
In the list of the notice of caching.If but then it must must be carried out by source of media 106 to this notice of calling party's streaming
Streaming, and again as described above it can be cached 212a.To available notice in cache element 322
Maintenance can be function or the function of cache 211 itself of access server 108.
Source of media 106 indicates 213 to carry out notice 107 delaying at a high speed at cache 211 to access server 108 every time
When depositing, the instruction in " the beginning streaming " that comprise in RTP or the RTCP message of source of media 106 can include that TTL resets
Value.Then the effective enumerator being associated with the ttl value noticed can be reset to and with in cache 211, notice be carried out
Its original value the same during cache 212a.When removing particular announcement from source of media 106, by no longer streaming, this leads to
Accuse, and therefore in its cache 211 being cached, this notice is expiring sometime.For in cache 211
The various alternatives that middle maintenance and/or removing are noticed can be applied.
The list of the notice of cache will be finite in practice.Depend on implementation, access server 108
Can have cache 211, this cache 211 has for up to 25 capacity noticed of storage.When being taken by access
Business device 108 carrys out streaming and notices, and when notice 107 comprises its instruction 213 that can be cached, then access server 108
The notice 322 of current cache can be removed for new notice.
Access server 108 can apply be used for determining safeguard in cache 322 which notice and which is removed
The alternative rule noticed, such as:
-notice in the notice of cache with the longest unused time can be removed；
-noticing can be associated with it by priority value according to source of media, the frequency of occurrences, other standards, has long holding
The notice of continuous time can cause more bandwidth conservation, therefore can this notice be associated with high priority.
It is furthermore possible to also provide indicate with noticing the notice version being associated, to facilitate the notice updated in cache.Can
With send at access server 108 and available at least one in cache element is led to source of media 106 forwarding
The instruction accused includes that version indicates.Source of media can use the notice of their own to check notice in cache 322
Version indicates.When the redaction noticed is in source of media, it can be to access server streaming by any way with height
This notice of speed caching instruction, allows access server use the notice updated to update its notice in cache 322.
Fig. 4 is the block diagram of access server 108.Access server 108 represents packet-switched telecommunication network (that is, IMS net
Network) the entity of boundary, will be by its outflow network to noticing relevant media.Can be in the high speed being associated with this entity
Caching 211 is cached 212a to the notice to subscriber 100 streaming 110,321.Can be in the instruction of source of media 106
319 times, notice to this subscriber 100 streaming 321 from cache 211.
Access server 108 includes processing unit 401 and communication unit 402, wherein, communication unit 402 include for
The transmitter 403 of other entity communications in packet-switched telecommunication network (more specifically, IMS network) and receiver.With difference
Transmitter 403 the same with receiver 404, communication unit 402 is adapted in use to various telecom agreement as known in the art to connect
Receive various communication network.The processing unit 401 being connected to transmitter 403 and receiver 404 utilizes memorizer 405.Process single
Unit 401 also controls function 406 with cache and cooperates.
Memorizer 405 is arranged to have the instruction set that can be performed by processing unit 401.
Receiver 404 is arranged to receive notice 107 and cache instruction 213 as mentioned above.Processing unit 401 is to height
Speed buffer control function 406 submits notice 107 and cache instruction 213 to.Cache controls function 406 in cache
In 211, notice 107 is cached 212a.Additionally, processing unit as mentioned above via transmitter 403 to subscriber equipment
100 forward 110 notices.
Cache 211 can be that memorizer 405(is not shown) a part so that cache 211 is incorporated to access
Server 108.Cache 211 can also is that the split memory as shown in Fig. 2～4, have for access server
The communication interface of 10 communications.Cache 211 can also be incorporated in network in another network node being close to access server,
To avoid being largely used to Internet resources store to cache 211 and retrieve 212b notice from cache 211.
Access server 108 may be fitted with indicating systematic function, and it is for generating in cache element 211
The instruction 316,320 that available at least one is noticed, can transmit 317,318 these instructions to source of media 106.Can will indicate
316,320 include in the caches can the list of notice of cache.Can be with being performed by processing unit 401
Software mode, or perform cache control function 406 and instruction systematic function by application specific hardware modules.
Receiver 404 be also arranged to from application server 102 receive for for calling party carry out media transmission with
And carry out media transmission from calling party and reserve the request 109 of resource.Processing unit 401 controls function 406 to cache and carries
Hand over this request.Cache 211, in response to request 109, is checked by cache control function 406, and creates at a high speed
The list of notice available in caching.This list can comprise and indicates the list of the identifier of the notice of cache (to see
Fig. 3,322).Processing unit 401 to transmitter 403 submit in the caches can the list of notice, transmitter 403 is to should
316 these lists are sent with server 102.
Receiver 404 is also arranged to reception makes access server 108 slow at a high speed to subscriber equipment 100 streaming 321
The instruction 319 of the notice deposited.Being controlled function 406 by processing unit 401 to cache and submit this instruction to, cache controls merit
Can 406 retrieval 212b notices from cache 211.Then processing unit 401 is submitted to transmitter 403 and is noticed, transmitter 403
321 are noticed to subscriber equipment 100 streaming.Instruction for noticing from cache 319 streaming can include or can be attached
The notice identifier 323 that the notice having and want streaming is associated.
Receiver 404 may be arranged to from source of media receive for provide in the caches can the row of notice
The request of table.Processing unit 401 controls function 406 to cache and submits this request to, and cache controls function 406 and checks height
Speed caching 211, and provide list to processing unit 401, processing unit 401 submits this list to and to source of media to transmitter 403
106 send this list.
Fig. 5 shows the block diagram of source of media 106.Source of media 106 constitutes streaming and notices the entity of 107.Work as source of media
106 have been received by the instruction for streaming particular announcement, and source of media 106 has been received by packet-switched telecommunication network
When the access server 108 of boundary has the instruction 318 of required notice in cache 211, then source of media 106 will
Instruction access server 108 retrieves 212b from cache 211 and streaming 321 is noticed rather than to access server 108 turns
Send out 110 these announcement media streams 107.Source of media 106 can e.g. MRFP or voice-mail system.
Source of media 106 includes processing unit 501 and communication unit 502, wherein, communication unit 502 include for packet
The transmitter 503 of other entity communications and receiver 504 in switched message network (more specifically, IMS network).With sending out respectively
Penetrating machine 503 the same with receiver 504, communication unit 502 is adapted in use to various telecom agreement as known in the art may be connected to
Various communication networks.Receiver 504 is suitable to receive the instruction 105,319 for providing notice from media source controller 104.
Processing unit 501 processes this instruction, and is suitable to carry out streaming notice 107 via transmitter.Processing unit 501 with
Cache instruction maker 506 is cooperated, and cache instruction maker 506 is for generating together with announcement media stream 107
Cache instruction 213.Processing unit 501 is cooperated with memorizer 505 generally, and memorizer 505 keeps programmed instruction, this program
Instruct step and the function of the method in use allowing processing unit 501 to perform to describe in this paragraph.Source of media 106 can be joined
Having cache instruction request generator (not shown in Fig. 5), it is used for asking access server 108 to provide cache
Notice list or provide particular announcement cache instruction.Source of media 106 may be fitted with streaming instruction and generates
Device (not shown), it is for generating the leading to for streaming cache to be sent to access server 108 by transmitter
Accuse the instruction 319 of 322.When receiving the instruction for generating notice, processing unit 501 can use from cache
The list noticed checks and instructs whether 105,319 these notices included can be used in the caches.Alternatively, processing unit
Can safeguard in memorizer 505 notice list and instruction access server 108 the most generated for notice into
The association status designator of the instruction of row cache.Processing unit 501 can also directly receive height from access server 108
The alternative instruction of available notice in speed caching 520.This instruction 320 can be from access server 108 to processing unit 501
Use the answer asking (not shown) for instruction that transmitter 503 sends to access server 108.
Can use in the caches if noticed, triggering streaming instruction generator being generated to access server 108 and allows
The instruction of the notice of access server 108 streaming cache, uses transmitter 503 to send this to access server and refers to
Order.If noticing the most unavailable, triggering cache instruction maker 506 and generating cache instruction 213,
Transmitter 503 is used to send this cache instruction 213 to access server 108.In latter case, use as above
Agreement uses transmitter 503 to send 107 notices to access server 108.
Fig. 6 is the block diagram of application server 102.Application server 1020 is the entity controlling access server 108, and it can
To be the IMS-ALG being associated with P-CSCF.Application server 102 may be adapted to perform to notice height as described above by SDP
Speed caching report.Application server 102 includes processing unit 601 and communication unit 602, communication unit 602 include for point
Organize transmitter 603 and receiver 604 that other entities in switched message network (more specifically, IMS network) communicate.With
Transmitter 603 respectively is the same with receiver 604, and communication unit 602 is adapted in use to various telecom agreement as known in the art
May be connected to various communication network.Receiver is suitable to receive setup requests 101, and transmitter 603 is arranged to access
Server 108 sends the instruction 109 for reserving resource and sends for asking that streaming is noticed to media source controller 104
Ask 103,317.
Processing unit 601 is cooperated with memorizer 605, and memorizer 605 has permission processing unit 601 and performs to retouch in this paragraph
The instruction of the function stated.Additionally, processing unit 601 and notice determine that unit 606 is cooperated, notice determine unit 606 for based on
The setup requests 101 received determines will be to the notice of subscriber 100 streaming.Instruction generator 607 based on a determination that
Notice and generate the request 103,317 noticed for streaming.Processing unit 601 is also cooperated with retransmission unit 608, retransmission unit
608 are suitable to forward the list of the notice of cache from access server.
When setup requests 101 arrives at application server 102 via receiver 604, notice and determine that unit 606 is true
Determine whether to be determined that unit 606 is noticed to subscriber equipment 100 streaming by notice.Processing unit 601 uses transmitter 603 to ask
109 access servers 108 are for carrying out media transmission to subscriber equipment 100 and carrying out media transmission from subscriber equipment 100 and continue to employ in advance
In the resource noticed to subscriber equipment 100 streaming, i.e. media connect, and request 109 access servers 108 generate address
(such as IP address), will notice to the transmission of this address stream and (under applicable circumstances) destination is calling part user equipment
Other real-time medias.In response to reserving resource at access server 108, processing unit 601 takes from access via receiver 604
Business device 108 receives at least one instruction 316 noticed available in cache element 211, such as, and cache
The list noticed.The processing unit 601 and then instruction 317 of available notice in cache will be included in request (SIP
Invite103), in the SDP offer included, notice and use retransmission unit 608 to use transmitter 603 to media to generate
Source controller 104 forwards this notice.
Fig. 7 is the block diagram of media source controller 104.Media source controller 104 may be adapted to receive the SDP in request 317
Offer, it comprises the list of the notice of cache in the instruction for streaming particular announcement.It is desirable that source of media control
Device 104 processed forwards 318SDP offer to source of media 106.Indicate source of media 106 to calling party 100 streaming particular announcement after when
When 107, it can use the list of notice of cache at access server cache 211 high speed caching to come really
Surely it is that streaming is noticed, still utilizes the cache 211 of access server 108.
Media source controller 104 includes processing unit 701 and communication unit 702, communication unit 702 include for packet
Transmitter 703 that other entities in switched message network (more specifically, IMS network) communicate and receiver 704.With point
Other transmitter 703 is the same with receiver 704, and communication unit 702 is adapted in use to the various telecom agreement as known in the art can
It is connected to various communication network.Receiver 704 is suitable to receive relevant to the instruction noticed for streaming from application server 102
SDP offer.Alternatively, the access server 108 that this SDP offer comprises by being associated with application server 102 sends
The list of the notice of cache, can be incorporated to this instruction in the list of the notice of cache.Transmitter 704 is configured
For sending the order for noticing to access server 108 streaming to source of media 106.
Processing unit 701 is cooperated with memorizer 705, and memorizer 705 has permission processing unit 601 and performs to retouch in this paragraph
The instruction of the function stated.Additionally, processing unit 701 is cooperated with retransmission unit 706, retransmission unit 706 is suitable to from application server
106 forward, to source of media 106, the instruction 317 received.Alternatively, instruction 318 comprise in the caches can notice
Instruction, notice and can comprise the list of the notice of cache.
Cache 211 and quickly connecting of access server 108 provide following attendant advantages: be from cache
211 faster can use than prior art to the notice of subscriber equipment 100 streaming 321.Another advantage is: due to cache
The more short path being communicated to access server, error rate can be the lowest, and therefore the notice from cache streaming has soon
Speed response time and can being streamed in the case of unbroken.
Another advantage is: the notice asked not necessarily is specifically designed for cache or revises, by it at a high speed
Cache or simply forward to the subscriber equipment 100 made requests on.
Request for announcement media is not yet transferred to another source of media, to receive cache from WMG
Notice.And comprise notice at described content server 106() and client between Conventional media streaming path as one man enter
The row follow-up streaming from cache to the notice of cache.WMG is positioned in this path.By including
ISUP and SIP is carried out management and control in interior standard call signaling and is come and gone by the media session of this WMG, and this media session is past
Return the transfer not relied on noticing request.
It is merely given as examples above-described embodiment.Can be at the model without departing from the present invention as disclosed in claims
It is altered or modified by any way in the case of enclosing or changes these embodiments.For example, it is possible to consider for from source of media 104 to
The alternate formats (transmission of such as medium content file) of 107 is noticed in access server 108 transmission, and this form is not intended to this
The scope of invention.
It is called for short
A-SBG accesses session border gateway
IBCF Interconnected Border controls function
IMS IP Multimedia System
IMS-ALG IMS application level gateway
IMS-MGW IMS WMG
IP Internet protocol
MGCF MGCF
MRFC media resource function controller
MRFP media resource function point
The network interface of NNI network
PCM pulse code modulation
P-CSCF Proxy Call Session Control Function
RTP RTP
RTCP RTCP Real-time Transport Control Protocol
SDP Session Description Protocol
SIP Session initiation Protocol
SIP-AS session initiation protocol application server
S-SBG signaling paths session border gateway
TrGw shifts gateway
The TTL time-to-live
UNI user is to network interface
VoIP voice based on Internet protocol
Reference
The subscriber equipment of 100 calling partys
101 setup requests
102 application server processes setup requests
103 for sending the request of notice
104 media source controller
105 for sending the instruction of notice
106 source of media
The notice that 107 source of media send
108 access servers
109 are used for for carrying out media transmission to calling part user equipment and carrying out from calling part user equipment
Media transmission and the request of reserved resource
The notice that 110 access servers send
211 caches
Notice is cached by 212a in the caches
212b retrieves notice from cache
213 cache instructions
214 for the notice identifier being cached notice
316 from the instruction to the notice in cache of access server
317 have the instruction noticed for streaming and in the caches can the finger of notice
The call or session set-up request shown
318 instructions noticed for streaming and in the caches can the instruction of notice
The instruction of 319 notices being used for streaming cache
320 from the alternative instruction to available notice in the caches of access server
321 notice from cache streaming
The notice of 322 caches
323 for retrieving the notice identifier of notice from cache
401 access server processing units
402 access server communication units
403 access server transmitters
404 access server receivers
405 access server memorizeies
406 access server caches control function
501 source of media processing units
502 source of media communication units
503 source of media transmitters
504 source of media receivers
505 source of media memorizeies
506 source of media cache instruction makers
601 application server processes unit
602 application server communication unit
603 application server transmitters
604 application server receivers
605 application server for storage devices
606 application servers are noticed and are determined unit
607 application server instructions makers
608 application server retransmission units
701 media source controller processing units
702 media source controller communication units
703 media source controller transmitters
704 media source controller receivers
705 media source controller memorizeies
706 media source controller retransmission units
Claims (16)
1. sent the method noticed, described access server (108) to subscriber equipment (100) by access server (108)
In use being operated in packet-switched telecommunication network, described method includes:
-receive described notice (107) from the source of media (106) worked described packet switching network；
-cache instruction (213) being associated with described notice is received from described source of media (106), it indicates and is used for allowing institute
State access server (108) and initialize the instruction of the cache to described notice；
-in response to received cache instruction (213) and received notice (107), accessing clothes with described
The cache element (211) that business device (108) is associated is cached (212a) to described notice；
-receive for the notice to described subscriber equipment (100) transmission (321) cache from described source of media (106)
Instruction；
-from described cache element (211), retrieve the notice of cache described in (212b)；And
-send, to described subscriber equipment (100), the notice of cache that (321) retrieve,
It is characterized in that:
Described notice (107) and described cache instruction (213) are embedded in announcement media stream, and described method also includes:
-from described announcement media stream, extract described notice (107)；
-from described announcement media stream, extract described cache instruction (213).
Method the most according to claim 1, described method also includes:
-from described cache instruction (213), extract the notice identifier being associated with received notice (107)
(214)；And
-wherein, and use described notice identifier (214) to perform the cache (212a) to described notice, high to identify
The notice of speed caching.
3., according to method in any one of the preceding claims wherein, also include:
-receive for carrying out media transmission and from described user to described subscriber equipment (100) from application server (102)
Equipment (100) carries out the request (109) that the resource of media transmission carries out reserving；And
-when receiving described request (109), send in described cache element to described application server (102)
(211) instruction (316) of notice available in.
Method the most according to claim 3, also includes:
-in the caches can the list of notice include described to available in described cache element (211)
The instruction noticed；
-send described list to described application server.
Method the most according to claim 1, wherein, retrieval (212b) step includes:
-extract from the instruction (319) for sending notice and notice identifier (323)；And
-from described cache element (211), retrieve the notice corresponding with described notice identifier (323).
6. the method being generated notice by source of media (106), described source of media (106) is operated in packet-switched telecommunication network
In, described method includes:
-receive the first instruction (105) for generating notice；
-send described notice (107) to the access server (108) worked in described packet switching network；And
-generate cache instruction (213) that (506) are associated with described notice；
-send described cache instruction (213) to described access server (108), to allow described access server (108) exist
The cache element (211) being associated with described access server (108) is cached (212a) to described notice；
-receive the second instruction (318) for generating described notice；And
-send the instruction for sending the notice of cache to subscriber equipment (100) to described access server (108)
(319),
It is characterized in that:
Described notice (107) is sent in announcement media stream, and
Wherein, the step sending described cache instruction (213) includes: embeds described high speed in described announcement media stream and delays
Deposit instruction (213).
Method the most according to claim 6, also includes:
-receive (318,320) to can in the described cache element (211) being associated with described access server (108)
The instruction of notice.
Method the most according to claim 7, wherein, described to described with what described access server (108) was associated
The instruction of notice available in cache element (211) be included in the caches can notice list in, described
Method also includes:
-extract from described list described in the described cache element being associated with described access server (108)
(211) instruction of notice available in.
Method the most according to claim 7, also includes:
-from the described notice to can use the described cache element (211) being associated with described access server (108)
Instruction in obtain correspondence notice identifier；And
-identifier (323) of described notice is included in described instruction (319).
Method the most according to claim 6, wherein, described packet-switched telecommunication network is voice based on Internet protocol
Network.
11. 1 kinds of access servers being in use operated in packet-switched telecommunication network (108), it is for subscriber equipment
(100) distribution is noticed, and described access server (108) including:
-processing unit (401)；
-memorizer (405), for cooperating with described processing unit (401)；
-communication unit (402), is used for being communicatively connected to subscriber equipment (100), is the most all operated in the described packet switching network
Source of media (106) in network and application server (102) and be associated with described access server (108) for right
Noticing the cache element (211) being cached, described communication unit (402) including: is arranged for receiving notice
(107) and for receiving the cache being associated with described notice (107) receiver (404) of (213), Yi Jixiang are indicated
Described subscriber equipment (100) sends the transmitter (403) of (110,321) described notice；
-cache controls function (406), is arranged in and receives described notice (107) and the instruction of described cache
(213), time, described notice (107) is cached (212a)；And
-described access server (108) is arranged to perform the step of the method according to any one of claim 1～5.
12. access servers according to claim 11, wherein, described access server is the entity in IMS network.
13. access servers according to claim 11, wherein, described packet-switched telecommunication network is based on Internet protocol
Speech network.
14. 1 kinds of source of media (106) being used for generating notice, described source of media (106) is in use operated in packet switch electricity
In communication network, described source of media includes:
-processing unit (501)；
-memorizer (505), for cooperating with described processing unit (501)；
-communication unit (502), for being communicatively connected to the media being the most all operated in described packet-switched telecommunication network
Source controller (104) and access server (108), described communication unit (502) including: generates, for receiving, the instruction noticed
(105) receiver (504) and for sending the transmitter (503) of described notice (107) to described access server (108)；
-cache instruction maker (506), is arranged to generate cache instruction (213) being associated with described notice,
To allow described access server that described notice to be cached；And wherein, described transmitter (503) be also arranged to
Described access server (108) sends described cache instruction (213)；And
-described source of media is arranged to perform the step according to the method according to any one of claim 6～9.
15. source of media according to claim 14 (106), wherein, described source of media (106) is the entity in IMS network.
16. source of media according to claim 14 (106), wherein, described packet-switched telecommunication network is based on internet association
The speech network of view.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/EP2011/050223 WO2012095165A1 (en) | 2011-01-10 | 2011-01-10 | Caching of announcements at the edge of a packet switched telecommunication network |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103299598A CN103299598A (en) | 2013-09-11 |
| CN103299598B true CN103299598B (en) | 2016-11-30 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101159971A (en) * | 2007-04-30 | 2008-04-09 | 华为技术有限公司 | Paging method, wireless network controller and access gateway |
| CN101534314A (en) * | 2008-03-12 | 2009-09-16 | 华为技术有限公司 | Method, system and device for reporting cache instruction |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101159971A (en) * | 2007-04-30 | 2008-04-09 | 华为技术有限公司 | Paging method, wireless network controller and access gateway |
| CN101534314A (en) * | 2008-03-12 | 2009-09-16 | 华为技术有限公司 | Method, system and device for reporting cache instruction |
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