WO2005027417A1 - Procede de soutien d'acces radio a une session multimedia ip dans un reseau umts - Google Patents
Procede de soutien d'acces radio a une session multimedia ip dans un reseau umts Download PDFInfo
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- WO2005027417A1 WO2005027417A1 PCT/CN2003/000791 CN0300791W WO2005027417A1 WO 2005027417 A1 WO2005027417 A1 WO 2005027417A1 CN 0300791 W CN0300791 W CN 0300791W WO 2005027417 A1 WO2005027417 A1 WO 2005027417A1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L47/00—Traffic control in data switching networks
- H04L47/70—Admission control; Resource allocation
- H04L47/80—Actions related to the user profile or the type of traffic
- H04L47/801—Real time traffic
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L47/00—Traffic control in data switching networks
- H04L47/10—Flow control; Congestion control
- H04L47/15—Flow control; Congestion control in relation to multipoint traffic
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L47/00—Traffic control in data switching networks
- H04L47/70—Admission control; Resource allocation
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L47/00—Traffic control in data switching networks
- H04L47/70—Admission control; Resource allocation
- H04L47/78—Architectures of resource allocation
- H04L47/783—Distributed allocation of resources, e.g. bandwidth brokers
- H04L47/785—Distributed allocation of resources, e.g. bandwidth brokers among multiple network domains, e.g. multilateral agreements
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L47/00—Traffic control in data switching networks
- H04L47/70—Admission control; Resource allocation
- H04L47/80—Actions related to the user profile or the type of traffic
- H04L47/808—User-type aware
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L47/00—Traffic control in data switching networks
- H04L47/70—Admission control; Resource allocation
- H04L47/82—Miscellaneous aspects
- H04L47/824—Applicable to portable or mobile terminals
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
- H04L65/1066—Session management
- H04L65/1083—In-session procedures
- H04L65/1095—Inter-network session transfer or sharing
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
- H04L65/80—Responding to QoS
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/16—Central resource management; Negotiation of resources or communication parameters, e.g. negotiating bandwidth or QoS [Quality of Service]
- H04W28/24—Negotiating SLA [Service Level Agreement]; Negotiating QoS [Quality of Service]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W8/00—Network data management
- H04W8/02—Processing of mobility data, e.g. registration information at HLR [Home Location Register] or VLR [Visitor Location Register]; Transfer of mobility data, e.g. between HLR, VLR or external networks
- H04W8/04—Registration at HLR or HSS [Home Subscriber Server]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
- H04L65/10—Architectures or entities
- H04L65/1016—IP multimedia subsystem [IMS]
Definitions
- the present invention relates to the technology related to IP Multimedia Subsystem (IMS) in UMTS (Universal Mobile Telecommunications System), and in particular to the realization of IP Multimedia Session (Sess ion) Radio Access Bearer (RAB) Unequal Error Protection (UEP) in UMTS system ) Methods.
- IMS IP Multimedia Subsystem
- UMTS Universal Mobile Telecommunications System
- RAB Radio Access Bearer
- UDP Unequal Error Protection
- the UMTS (Universal Mobile Telecommunications System) system is a third-generation mobile communication system that uses WCDMA for wireless technology. Its standardization work is completed by the 3GPP (Third Generation Partnership Project) organization. So far, four versions have been developed, namely Release 99, Release 4. Release 5 and Release 6. In Release 5, the UMTS core network introduced a new domain, namely the IP Multimedia Subsystem (IMS) domain, on the basis of some Circuit Switched (CS) domains and Packet Switched (PS) domains.
- IMS IP Multimedia Subsystem
- the IMS domain is a network that provides IP multimedia services using IP application-level signaling SIP (Session Initiation Protocol) to implement IP multimedia session call control.
- SIP Session Initiation Protocol
- Its core is a network called Call State Control Function (CSCF) that is functionally equivalent to a SIP server.
- CSCF Call State Control Function
- the original PS domain core network namely the GPRS (General Packet Radio Service) packet data network, is actually a packet network that provides IP multimedia service signaling and user data bearer.
- GPRS General Packet Radio Service
- the CS domain provides better support for unequal error protection of sessions and stream-type services including AMR (Adaptive Multi-Rate) voice services.
- AMR Adaptive Multi-Rate
- the CS domain core network has complete information about the structure of the AMR voice frame data stream. Therefore, the CS domain core network can specify parameters such as the format of its substream SDU (Service Data Unit) when establishing the RAB of AMR voice. And thus without The line interface implements unequal error protection for each subflow.
- IP multimedia sessions are established through end-to-end application-level signaling, and through RAMP
- the SGSN sends RAB allocation or modification instructions to the UMTS radio access network (UTRAN) through RANAP signaling, and UTRAN sends RB (wireless) to the UE through RRC (radio link control) signaling. Bearer) establishment request.
- UTRAN UMTS radio access network
- RRC radio link control
- Bearer Bearer
- IE u Quality of service ⁇ such as "Modify PDP Context Reques t” carries parameters that reflect media characteristics such as media stream format. As shown in FIG. 4, since the IE "Quality of service" in the current protocol does not support the structure of multiple sub-flows, the IE needs to be modified.
- the PDP Context activation or modification request message initiated by the UE is "Act iva te PDP Context Reques t", "Modify PDP Context Reques t” and other media carrying media stream format and other media. Parameters of the characteristic. However, this program does not work for IE ⁇ Quality of service "is modified, but an IE is added as a transparent" container "that contains media features.
- the present invention proposes an effective implementation method for the problems existing in the prior art mentioned above.
- the user equipment and the IP multimedia subsystem establish an IP multimedia session through SIP / SDP (Session Description Protocol) application-level signaling, and determine related media characteristics through SIP / SDP negotiation;
- SIP / SDP Session Description Protocol
- the IP multimedia subsystem maps the relevant SDP parameters to authorized IP QoS parameters on the one hand, and also extracts the format information of the media IP packet from the relevant SDP parameters, and the authorized IP QoS parameters and the Format information of the media IP packet is transmitted to the GPRS packet data network;
- the GPRS packet data network maps the authorized IP QoS parameters to the authorized UMTS QoS parameters, and converts the format information of the media IP packet to relevant information reflecting the format of the media IP packet in the RANAP (Radio Access Network Application Protocol) message.
- Parameters typically IE U SDU Forma t Information ";
- the UMTS QoS parameters from the user equipment are compared with the authorized UMTS QoS parameters in the GPRS packet data network. According to the comparison result, the UMTS radio access network agrees to the activation or update of the PDP Context.
- the GPRS packet data network transmits the relevant parameters reflecting the information of the media IP packet format to the UMTS radio access network through a RANAP message. Based on the information, the UMTS radio access network applies the non-equivalence error protection mechanism to establish the corresponding radio access bearer. Optimization of RAB.
- the method overcomes the problem of inconsistency with the functional division of the existing 3GPP protocol architecture caused by the prior art relying on the terminal UE instead of the core network to provide media characteristics parameters such as the media stream format to the RNC, and the potential post-UE To Compatibility issues, do not change the existing 3GPP protocol framework, and use the existing SBLP-based QoS control mechanism in the IMS domain to make the non-equivalence error protection implementation method consistent with the UMTS end-to-end IP QoS structure.
- FIG. 1 is a schematic diagram of an IMS domain network structure in the UMTS according to the present invention
- FIG. 2 is a UMTS end-to-end QoS structure
- Figure 3 is a schematic diagram of UMTS bearer service establishment
- Figure 4 shows the structure of the information unit "Quaity of Serv ice"
- Figure 5 shows the QoS attribute parameters of the UMTS bearer service
- Figure 6 shows the process of establishing an IP multimedia session in the IMS domain
- FIG. 7 shows the SDU format of the AMR voice RAB
- Figure 8 is a schematic diagram of the 12.2kbps AMR / RTP / UDP / IPv6 packet structure using the octet alignment mode
- Figure 9 is a schematic diagram of the 12.2kbps AMR / RTP / UDP / IPv6 packet structure using the bandwidth effective mode
- FIG. 10 is a schematic diagram of IMS domain IP multimedia service quality of service parameter mapping
- FIG. 11 is a signaling process of an IMS domain IP multimedia service RAB non-equal error protection implementation method proposed by the present invention
- FIG. 12 is a prior art solution based on RRC signaling
- Figure 13 is a prior art solution based on a transparent "container”. detailed description
- FIG. 1 is a schematic diagram of an IMS domain network structure in a UMTS according to the present invention.
- the UE user equipment
- the UTRAN UMTS radio access network
- the air interface that is, the Uu interface, where the UTRAN is made by Node B (Node B) and RNC (radio network controller)
- the interface between UTRAN and SGSN is Iu-PS interface
- SGSN and GGSN are network elements of the PS domain core network, the interface between them is Gn interface
- GGSN and The interface of the external packet data network (PDN) is a Gi interface.
- the CSCF is generally divided into network elements with three different functions: P-CSCF, S-CSCF, and I-CSCF. Among them, the P-CSCF is connected to the GGSN through a Gi interface.
- the P-CSCF is a network element that directly performs SIP signaling interaction with the Internet in the visited network. It is functionally equivalent to a SIP proxy server, and its IP address is found by the UE during the registration process in the IMS network. of.
- the S-CSCF is the multimedia session master server of the UE in its home network. It is responsible for the UE's registration in the IMS network and processes all service requests of the UE.
- the I-CSCF is used to shield the IP addresses of the network elements in the IMS domain within the operator's network. It functions similarly to a firewall.
- the IMS domain mainly provides IP multimedia services such as voice, audio and video with high real-time requirements.
- IP multimedia services such as voice, audio and video with high real-time requirements.
- UTRAN and GPRS packet data networks provide SIP signaling and user data bearer services for IP multimedia services. Therefore, IMS The QoS (Quality of Service) of the domain IP multimedia service is closely related to the QoS of the UMTS bearer service. To this end, the following will further explain the establishment of the UMTS bearer service, the UMTS bearer service QoS structure, and the IMS domain IP multimedia session establishment process.
- the end-to-end QoS structure of UMTS is defined.
- Figure 2 shows the UMTS end-to-end QoS structure.
- the UMTS bearer service is composed of two segments, namely a radio access bearer (RAB) service and a core network bearer service, and the radio access bearer service is composed of a radio bearer service and an Iu bearer service.
- RAB radio access bearer
- Iu bearer service Iu bearer service
- GPRS packet data network UMTS hosting service is also called GPRS bearer service
- a GPRS The bearer service corresponds to a PDP Context (packet data protocol context).
- PDP Context is a general term for all relevant information sets of the UE-second session. It includes QoS attribute parameters, PDP type, PDP address assigned to the UE (IP address for IP networks), and a gateway (ie, GGSN) connected to an external PDN. ) And other information.
- UMTS supports multiple PDP contexts that use the same PDP address. Each PDP context can have different QoS requirements.
- TFT Service Flow Template
- TFT is a set of packet filters, which can distinguish the packets of each PDP Context of the same PDP address according to DiffServ code points, IPv6 protocol, IP source address, and so on.
- the TFT is generated and managed by the UE.
- the uplink direction of the TFT is in the UE, and the downlink direction is transmitted from the UE to the GGSN by the PDP Contex activation or modification process.
- FIG. 3 is a schematic diagram of a process of establishing a UMTS bearer service initiated by a UE.
- an application in the UE wants to initiate a session, it initiates a request to activate the PDP Context to the SGSN through an API (Application Programming Interface) interface, and the corresponding message carries the QoS attributes required by the application. Parameters, such as PDP Contex t related information.
- the SGSN and the GGSN allocate resources required by the core network bearer and establish the corresponding core network bearer according to the QoS attribute parameter. Among them, the SGSN and the GGSN can limit the QoS attribute parameters requested by the UE according to network capabilities, load conditions, and operation policies.
- the QoS attribute parameters of the PDP Contex t are also mapped to the QoS attribute parameters of the corresponding RAB.
- the SGSN initiates the RAB allocation command to the RNC, and the RNC allocates the required radio resources and establishes the Iu bearer and the radio bearer according to the RAB QoS attribute parameters provided by the SGSN. In this way, an UMTS bearer of an application of the UE is established in the UMTS network.
- the UE uses signaling "Ac t iva te PDP Contex t Reques t" to establish the first PDP Context, it may also use signaling "Ac t iva te Secondary PDP Context Reques t" to establish an additional PDP Context for the same PDP address
- the signaling also includes TFT parameters.
- You can also use the "Modify PDP Context Request" signaling to modify the QoS attribute parameters of the PDP Context.
- GPRS session management signaling and procedures please refer to 3GPP's TS23.060, TS24.008 and other protocol documents.
- the above GPRS session management messages such as PDP Context activation and modification all carry an information element (IE) "Quality of service" containing the QoS attribute parameters of the PDP Context.
- Fig. 4 shows the information element "Quality of Service” structure.
- Octet represents an octet, of which Octetl ⁇ 0ctet5 is used for GPRS network before UMTS
- Octet6 ⁇ Octetl4 is used for UMTS
- its various parameters are shown in Figure 5.
- FIG. 5 For detailed definitions, please refer to the 3GPP protocol document TS23. 107.
- FIG. 6 shows the IMS domain IP multimedia session establishment process.
- the UE first accesses the GPRS network through a GPRS Attach process. After that, the UE will initiate a request to activate a PDP context, thereby establishing an IMS application-level SIP.
- the signaling GPRS bearer channel after that, the UE starts to register with the CSCF through SIP signaling to obtain the IMS service.
- the UE completes the IMS registration, it can accept the calling or called request of the IMS multimedia session at any time.
- the related call processing is completed through the end-to-end SIP signaling process controlled by CSCF.
- the second PDP Context When the SIP-level call processing is completed, the second PDP Context will be activated, thereby establishing a GPRS bearer for IP multimedia user data.
- the reason why multiple PDP contexts are needed is because the QoS attributes required by application-level signaling and multimedia user data are different.
- the source coding mode and media characteristics used are negotiated through end-to-end SIP signaling controlled by the CSCF.
- the control of the CSCF is performed according to the network's resource conditions, service capabilities, and operations. Policies, etc. restrict and authenticate source coding modes and media characteristics.
- SDU Format Information is a QoS parameter item unique to RAB services and can be applied to session and stream type services.
- SDU Format Information gives the SDU transmitted from the core network by the RAB. (Service Data Unit) format information. Using this format information, the RNC can achieve unequal error protection (UEP), thereby optimizing the QoS of the RAB and improving the utilization rate of wireless resources.
- UDP unequal error protection
- the QoS parameter item "SDU Format Information” is sent from the core network to the RNC through a RANAP (Radio Access Network Application Protocol) message "RAB Assignment Request".
- the IE carried in the "RAB Assignment Request” message includes the IE "RAB parameters", which actually contains all the QoS attribute parameters of the RAB.
- SDU parameters is a secondary IE of IE "RAB parameters".
- RAB parameters When the data stream sent from the core network to the RNC via the Iu interface is composed of multiple RAB subflows with different QoS requirements, each subflow is Corresponding to the respective DU parameters "parameter items.
- This IE contains four secondary IEs:" SDU error ratio "," Residual BEET, "" Delivery of Erroneous SDUs n .
- U SDU forma t informa tion parame ter ", of which IE”
- the SDU for information parameter describes the "SDU Format Information" parameter in the above UMTS bearer service QoS attribute parameter.
- SDU format information parameter contains two secondary IE u Sub flow SDU size n (subflow SDU size) And "RAB Subflow Combination bit rate” Combined bit rate), one or a combination of which describes the RAB format information.
- the "Subflow SDU size” is generally used to describe the SDU format of its RAB, as shown in Figure 7.
- RNC based on the "SDU parame ter s n parameter item, corresponding to each of the RAB sub-streams of different QoS requirements, by selecting a different radio parameters such as type of channel coding, rate matching attributes, etc. to achieve unequal error protection for different sub-streams, such that the effective Utilize wireless resources and guarantee QoS of RAB services c
- the VoIP service in the IMS domain is used as an example to further introduce the RTP packet payload format of AMR voice and the QoS mechanism in the IMS domain.
- the unequal error protection of the VoIP service is taken as an example here, the method and principle proposed by the present invention are also applicable to other IMS domain IP real-time multimedia services.
- the transmission protocol of the VoIP service in the IMS domain is RTP (Real-time Transport Protocol) / UDP (User Datagram Protocol) / IP, where the IP layer protocol can adopt IPv4 or IPv6 version, according to the 3GPP specification TS26.
- the IMS domain VoIP service uses a narrowband AMR speech codec or a wideband AMR (AMR-WB) speech codec, and their RTP payload data format follows the IETF (Internet Engineering Technology Group) standard RFC3267, and according to 3GPP Standards TS25. 414 and TS25. 415, the user plane wireless network layer protocol Iu UP of the Iu-PS interface adopts transparent mode.
- the user plane transport network layer protocol GTP-U (user plane GPRS tunneling protocol) packet bearer of the Iu-PS interface Is the user data packet consisting of the above RTP / UDP / IP packet header and the RTP payload part, where the payload of RTP, that is, the format and structure of the AMR or AMR-WB coded data block, as defined by the IETF standard RFC3267 .
- the AMR or AMR-WB coded data frame carried by the RTP is composed of three parts, that is, a frame header, a content list, and speech coded data.
- the frame The format supports two modes, namely the bandwidth effective mode and the octet alignment mode. Among them, the bandwidth effective mode is in bits and there is no need to add padding bits. Therefore, in a network with limited bandwidth resources such as wireless, the bandwidth can be effectively used. Group alignment mode facilitates interconnection with other networks.
- the RTP payload defined by RFC3267 can adopt any flexible structure according to requirements. The detailed description of the specific frame structure is usually used as part of the SDP message body. It is determined through end-to-end negotiation during SIP signaling such as session establishment. of.
- a SIP message is composed of a SIP protocol header and a message body.
- the SIP protocol header corresponds to the control signaling for session call establishment, termination, and modification defined by the SIP protocol, and all information related to the session and media is used.
- the SDP (Session Description Protocol) protocol is described and encapsulated as a message body in a SIP message.
- the SDP description is divided into a session-level description and a media-level description.
- the media-level description includes information such as a media type, an encoding method, a transmission protocol, and a media format.
- Figure 8 and Figure 9 show the typical structure of an AMR voice frame with an RTP / UDP / IPv6 carrying rate of 12.2kbps in these two modes (the definition and role of each field in the figure can refer to the relevant technical standards of the IETF In the figure, shades are used to distinguish the A, B, and C bits of 12.2kbps AMR speech. Different types of encoded bits have different importance for speech decoding, so their protection levels, that is, QoS requirements are different. .
- VoIP packets in the IMS domain are mainly composed of three types of data bits, namely RTP / UDP / IP packet headers, AMR speech frame headers, and AMR speech encoding data, and AMR speech encoding data is divided into different categories with different QoS requirements. Encoding bits. As mentioned earlier, as long as the RNC has obtained all the information about these formats, it can implement an unequal error protection mechanism for wireless performance optimization.
- FIG. 10 is a schematic diagram of QoS parameter mapping of IP multimedia services in the IMS domain. Root According to the UMTS end-to-end IP QoS structure given by TS23.207, the QoS of IP multimedia services in the IMS domain is managed and controlled based on SBLP (service-based local policy) technology. Among the functional units related to the IP QoS management function in the UE, GGSN, and P-CSCF shown in FIG.
- SBLP service-based local policy
- the IP bearer service management functional unit adopts a standard IP QoS mechanism to manage IP bearer services, and typically includes DiffServ (Differentiated Services) Edge function or RSVP (Resource Reservation Protocol) function, where the IP bearer service management function of the UE is optional, the GGSN IP bearer service management function is required, and in order to support SBLP-based end-to-end IP QoS management Technology also includes a policy enforcement point (PEP) function.
- the P-CSCF contains a PDF (Policy Decision Function) unit, and the interface between it and the GGSN Go follows the COPS (Public Open Policy Service) protocol of the IETF.
- COPS Public Open Policy Service
- the translation / mapping function is responsible for the mutual conversion of QoS parameters between the UMTS bearer service and the upper layer.
- the IP QoS parameters are mapped to the required UMTS QoS parameters.
- the application layer such as SDP
- the IP layer (Eg RSVP) QoS parameters are mapped to the required UMTS QoS parameters.
- media-related characteristics including media type, encoding method, transmission protocol, and media format are determined through end-to-end S IP / SDP signaling negotiation controlled by CSCF.
- the P-CSCF forwards the relevant SDP information determined to the PDF to the PDF, and the PDF maps the relevant SDP parameters to authorized IP QoS parameters and transmits them to the GGSN through the Go interface.
- the GGSN then transmits the authorized IP QoS.
- the parameters are mapped to authorized UMTS QoS parameters.
- the UE also maps the relevant SDP parameters and application requirements determined through negotiation into certain UMTS QoS parameters, and sends them to the PS domain core network through the PDP Context activation or modification request message as an IE "Quality of service”.
- GGSN On the other hand, the UE also maps the relevant SDP parameters and application requirements determined through negotiation into certain UMTS QoS parameters, and sends them to the PS domain core network through the PDP Context activation or modification request message as an IE "Quality of service”.
- GGSN Once the PDP Context activation or modification request is received, the GGSN will compare the u Quali ty of service "requested by the UE with the corresponding authorized UMTS QoS parameters. If the UE's QoS request is within the PDF authorization range, the PDP Context Requests for activation or modification will be accepted, otherwise they will be rejected.
- the interfaces of all functional units except the Go interface are internal interfaces related to the implementation and are not standardized.
- COPS is a query / response protocol based on the client / server model. It defines a standard interface framework that allows user-specific information to be encapsulated in objects without modifying the COPS protocol itself.
- standard COPS messages SSQ, 0PN, CAT, CC, KA, SSC, etc. are used to establish and maintain the connection between PDF and GGSN.
- the COPS messages related to QoS policy control are REQ, DEC, RPT and DRQ.
- the P-CSCF will provide the following SDP information in the S IP / SDP message to the PDF functional unit:
- o source direction (originator or terminator);
- the relevant IP quality of service parameters are transmitted to the GGSN through the COPS message of the Go interface, and the GGSN maps the relevant IP quality of service parameters to authorized UMTS QoS parameters, so that the policy enforcement point of the GGSN
- the function controls the QoS requested by the UE.
- "Authorized QoST mainly includes two types of parameters, that is, the data rate in the uplink and downlink directions and the largest QoS category.
- the above SDP parameters refer to the IETF specification RFC 2327, and the above SDP parameters are mapped to
- Authorized Qo Detailed algorithm of parameters Reference can be made to the 3GPP specification TS29.208.
- FIG. 11 illustrates a signaling process of a method for implementing RAB unequal error protection of an IMS domain IP multimedia service according to the present invention.
- application-level SIP / SDP call processing is used to establish an IP multimedia session, which includes negotiating media characteristics such as the media encoding and decoding methods described in TS23.228 and TS24.228, and the P-CSCF transmits the relevant SDP parameters to the PDF.
- the SDP parameters are mapped to parameters such as "Authorized Qo ⁇ " by the PDF.
- the PDF also extracts the media IP packet format information from the relevant SDP parameters and encapsulates the media IP packet format information in the "Media Flow Inff".
- the COPS message of the Go interface transmits the parameters in the current standard such as "Authorized QoST” and the "Media Flow Info” in the present invention to the GGSN.
- the UE maps the relevant SDP parameters and application requirements into certain UMTS QoS parameters to form IE "Quality of service”, send to SGSN through PDP Context activation or modification request message, SGSN sends Gn interface messages such as "Crea te PDP Context Reques t", "Upda te PDP Context Reques t" to GGSN, according to the present invention, GGSN transparently forwards Media Flow Info "to SGSN in the corresponding response message, and SGSN converts" Media Flow Info "to the IE U SD in the aforementioned RANAP related message U Forma t I ⁇ forma t ion ".
- the SGSN can enable the RNC to establish an optimized RAB with unequal error protection characteristics in UTRAN through standard Iu interface signaling and mechanisms.
- the present invention slightly modifies the Gn and Go interface signaling of the existing 3GPP specifications, that is, in the Gn interface message "Crea te PDP Context Response" and
- the present invention does not involve modification of this interface, but in order to enable PDF to be extracted Information such as media format forms "Media Flow Info". Therefore, in addition to the SDP parameters provided to the PDF by the P-CSCF required in the aforementioned TS29.207, according to the present invention, the P-CSCF should also provide the following SDP parameters to the PDF:
- PDF can obtain the format information of the media IP packet and form the parameter "Flow Inf (T.
- the media IP packet can be divided into the following segments: RTP / UDP / IP packet header, RTP payload header Coded bits of different QoS types in the media data (such as A / B / C bits of 12.2kbps AMR), "Media Flow Info” includes the position of different segments in the IP packet and the u SDU of the corresponding segment parameters such as error ra tio ", u Residual BER", and u Delivery of Erroneous SDUs ".
- the position of different segments in the IP packet can be expressed in multiple ways, such as the length of each segment represented by bits or the first one from the packet.
- the bit distance, etc., and the QoS parameters of each segment U SDU error ratio , u Residual BEET, "Delivery of Erroneous SDUs", etc. can be derived by using certain algorithms in combination with certain empirical data and other SDP parameters.
- the present invention names the media IP packet format information extracted by the PDF from the relevant SDP parameters as Media Flow Info n .
- the present invention does not limit the name of the format information and may use other names.
- the present invention is described using the UMTS system as an example, the methods and principles proposed by the present invention are also applicable to other mobile communication systems, such as CDMA2000, GPRS / EDEG, and the like.
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Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/CN2003/000791 WO2005027417A1 (fr) | 2003-09-18 | 2003-09-18 | Procede de soutien d'acces radio a une session multimedia ip dans un reseau umts |
US10/572,331 US20070204050A1 (en) | 2003-09-18 | 2003-09-18 | Method Of Radio Access Bearer For Ip Multimedia Session In Umts Network |
AU2003264323A AU2003264323A1 (en) | 2003-09-18 | 2003-09-18 | Method of ip multimedia session radio access bearing in the umts network |
CNB038269481A CN100454859C (zh) | 2003-09-18 | 2003-09-18 | Umts网络中ip多媒体会话无线接入承载的方法 |
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PCT/CN2003/000791 WO2005027417A1 (fr) | 2003-09-18 | 2003-09-18 | Procede de soutien d'acces radio a une session multimedia ip dans un reseau umts |
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Publication Number | Publication Date |
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WO2005027417A1 true WO2005027417A1 (fr) | 2005-03-24 |
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PCT/CN2003/000791 WO2005027417A1 (fr) | 2003-09-18 | 2003-09-18 | Procede de soutien d'acces radio a une session multimedia ip dans un reseau umts |
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Country | Link |
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US (1) | US20070204050A1 (zh) |
CN (1) | CN100454859C (zh) |
AU (1) | AU2003264323A1 (zh) |
WO (1) | WO2005027417A1 (zh) |
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WO2007085196A1 (fr) * | 2006-01-25 | 2007-08-02 | Huawei Technologies Co., Ltd. | Procédé et système d'enregistrement dans un sous-système multimédia ip |
CN100389568C (zh) * | 2006-02-27 | 2008-05-21 | 华为技术有限公司 | 一种使网络中各实体服务质量保持一致的方法 |
CN100421405C (zh) * | 2005-10-26 | 2008-09-24 | 华为技术有限公司 | 为非分组模式的移动终端接入多媒体业务的网络及方法 |
CN100428718C (zh) * | 2005-10-19 | 2008-10-22 | 华为技术有限公司 | 一种非ims移动终端接入ims域的鉴权注册方法及装置 |
CN100440997C (zh) * | 2005-10-22 | 2008-12-03 | 华为技术有限公司 | 一种将传统移动终端接入多媒体域的系统和方法 |
CN100450303C (zh) * | 2006-01-24 | 2009-01-07 | 华为技术有限公司 | Sgsn间切换的实现方法 |
US8452327B2 (en) | 2008-06-13 | 2013-05-28 | Huawei Technologies Co., Ltd. | Method for data communication, system for communication and related devices |
CN103152342A (zh) * | 2006-12-22 | 2013-06-12 | 日本电气株式会社 | 线路交换用户代理系统、通信装置以及运用于这些系统和装置的服务提供方法 |
CN105934952A (zh) * | 2014-01-09 | 2016-09-07 | 三星电子株式会社 | 用于在多媒体系统中发送和接收媒体数据的方法和装置 |
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2003
- 2003-09-18 CN CNB038269481A patent/CN100454859C/zh not_active Expired - Fee Related
- 2003-09-18 AU AU2003264323A patent/AU2003264323A1/en not_active Abandoned
- 2003-09-18 WO PCT/CN2003/000791 patent/WO2005027417A1/zh active Application Filing
- 2003-09-18 US US10/572,331 patent/US20070204050A1/en not_active Abandoned
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CN1323122A (zh) * | 2000-05-09 | 2001-11-21 | 朗迅科技公司 | 3g或新一代电信网络ⅲ中的资源保存 |
WO2002041592A1 (en) * | 2000-11-14 | 2002-05-23 | Telefonaktiebolaget Lm Ericsson (Publ) | Network requested packet data protocol context activation |
KR20010035104A (ko) * | 2000-12-23 | 2001-05-07 | 유재광 | 비동기 이동통신 시스템에서 최소 대역을 갖는 Mobile IP등록 기법 |
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CN100428718C (zh) * | 2005-10-19 | 2008-10-22 | 华为技术有限公司 | 一种非ims移动终端接入ims域的鉴权注册方法及装置 |
CN100440997C (zh) * | 2005-10-22 | 2008-12-03 | 华为技术有限公司 | 一种将传统移动终端接入多媒体域的系统和方法 |
CN100421405C (zh) * | 2005-10-26 | 2008-09-24 | 华为技术有限公司 | 为非分组模式的移动终端接入多媒体业务的网络及方法 |
CN100450303C (zh) * | 2006-01-24 | 2009-01-07 | 华为技术有限公司 | Sgsn间切换的实现方法 |
WO2007085196A1 (fr) * | 2006-01-25 | 2007-08-02 | Huawei Technologies Co., Ltd. | Procédé et système d'enregistrement dans un sous-système multimédia ip |
CN100389568C (zh) * | 2006-02-27 | 2008-05-21 | 华为技术有限公司 | 一种使网络中各实体服务质量保持一致的方法 |
CN103152342A (zh) * | 2006-12-22 | 2013-06-12 | 日本电气株式会社 | 线路交换用户代理系统、通信装置以及运用于这些系统和装置的服务提供方法 |
US8838168B2 (en) | 2008-06-13 | 2014-09-16 | Huawei Technologies Co., Ltd. | Method for data communication, system for communication and related devices |
US8452327B2 (en) | 2008-06-13 | 2013-05-28 | Huawei Technologies Co., Ltd. | Method for data communication, system for communication and related devices |
US9060358B2 (en) | 2008-06-13 | 2015-06-16 | Huawei Technologies Co., Ltd. | Method for data communication, system for communication and related devices |
US9369860B2 (en) | 2008-06-13 | 2016-06-14 | Huawei Technologies Co., Ltd. | Method for data communication, system for communication and related devices |
US10009934B2 (en) | 2008-06-13 | 2018-06-26 | Huawei Technologies Co., Ltd. | Method for data communication, system for communication and related devices |
US10334639B2 (en) | 2008-06-13 | 2019-06-25 | Huawei Technologies Co., Ltd. | Method for data communication, system for communication and related devices |
US10652937B2 (en) | 2008-06-13 | 2020-05-12 | Huawei Technologies Co., Ltd. | Method for data communication, system for communication and related devices |
CN105934952A (zh) * | 2014-01-09 | 2016-09-07 | 三星电子株式会社 | 用于在多媒体系统中发送和接收媒体数据的方法和装置 |
US10264299B2 (en) | 2014-01-09 | 2019-04-16 | Samsung Electronics Co., Ltd. | Method and apparatus for transmitting and receiving media data in multimedia system |
CN105934952B (zh) * | 2014-01-09 | 2019-04-19 | 三星电子株式会社 | 用于在多媒体系统中发送和接收媒体数据的方法和装置 |
Also Published As
Publication number | Publication date |
---|---|
AU2003264323A1 (en) | 2005-04-06 |
CN100454859C (zh) | 2009-01-21 |
CN1820461A (zh) | 2006-08-16 |
US20070204050A1 (en) | 2007-08-30 |
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