WO2006069479A1 - Procede et systeme de realisation d'une convergence de plusieurs liaisons dans un systeme umts - Google Patents

Procede et systeme de realisation d'une convergence de plusieurs liaisons dans un systeme umts Download PDF

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Publication number
WO2006069479A1
WO2006069479A1 PCT/CN2004/001548 CN2004001548W WO2006069479A1 WO 2006069479 A1 WO2006069479 A1 WO 2006069479A1 CN 2004001548 W CN2004001548 W CN 2004001548W WO 2006069479 A1 WO2006069479 A1 WO 2006069479A1
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WO
WIPO (PCT)
Prior art keywords
link
ppp
support node
gprs support
packet data
Prior art date
Application number
PCT/CN2004/001548
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English (en)
Chinese (zh)
Inventor
Sheng Liu
Baijun Zhao
Gaoquan Lin
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Utstarcom Telecom Co., Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Utstarcom Telecom Co., Ltd. filed Critical Utstarcom Telecom Co., Ltd.
Priority to PCT/CN2004/001548 priority Critical patent/WO2006069479A1/fr
Priority to CNA2004800447645A priority patent/CN101091335A/zh
Publication of WO2006069479A1 publication Critical patent/WO2006069479A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/15—Setup of multiple wireless link connections

Definitions

  • the present invention relates to a wireless transmission technology for packet data in a mobile communication system, and more particularly to a method and system for increasing data transmission rate by using multiple link aggregation of multiple wireless modems in a UMTS system.
  • MAR A Commuter Router Infrastructure for the Mobi le Internet
  • UMTS Universal Mobile Telecommunications System
  • GPRS General Packet Data Service
  • WLAN Wireless Local Area Network
  • the MAR has the capability of multi-link aggregation of different systems, the system requires a special MAR access server to achieve multi-link aggregation, and multi-link aggregation will be required due to the large delay difference of different data links. Larger capacity caches result in larger end-to-end transmission delays.
  • the transmission paths experienced by each link in the wireless communication system are similar, and thus may Take more efficient multi-link aggregation technology to reduce end-to-end transmission delay and reduce system complexity.
  • the wireless modems corresponding to each link need to occupy different network layer addresses respectively (ie, Multiple IP address resources are required. Therefore, more efficient multi-link aggregation technology is also needed to avoid the consumption of the above system resources.
  • PPP Point-to-Point Protocol
  • ML-PPP Multilink Point-to-Point Protocol
  • Point-to-Point Protocol provides a method for transmitting multi-protocol datagrams over a point-to-point link. It consists of three main components: a method of encapsulating multi-protocol datagrams; used to establish, configure, and Test Link Control Protocol (LCP) for data link connections; and Network Control Protocol Suite (NCP) for establishing and configuring different network layer protocols.
  • LCP packets are divided into three categories: link configuration packets (Configure-Request, Conf igure-Ack Conf igure-Nak, and Conf igure-Reject) for establishing and configuring links, which are used to terminate links with links.
  • Termination packets ( Terminate-Request, Terminate-Ack, Terminate-Request, and Terminate-Ack), and link maintenance packets for managing and testing links (Code-Reject;, Protocol-Reject s Echo-Request;, Echo- Reply ⁇ Discard-Request ).
  • each end of the PPP link must first send an LCP packet to configure and test the data link.
  • the peer can authenticate, and then the PPP must The NCP packet is sent to select and configure one or more network layer protocols. Once the configuration of the network layer protocol is completed, the data packet can be sent on the link until the link is explicitly closed with the LCP packet.
  • the Multilink Point-to-Point Protocol is a protocol that extends PPP to take full advantage of link bandwidth.
  • the ML-PPP specification extends three LCP options related to multi-link operation, namely MRRU (Multilink Maximum Receive Reconstruction Unit), Multilink Short Sequence Header Format, and Endpoint Discriminator on the PPP link. During the establishment, these three options are used. When there are more than one physical link on the same two ends, each physical link can be aggregated into a logical link bundle, thereby providing a multi-link aggregation for the upper layer protocol. A logical link with increased bandwidth.
  • the sender system can freely transmit data with a multilink header, where ML-PPP encapsulates the PPP multilink segmentation data using the protocol identifier 0x00-0x3d.
  • ML-PPP encapsulates the PPP multilink segmentation data using the protocol identifier 0x00-0x3d.
  • the packet scheduling policy of each member link in the ML-PPP multi-link it is possible to divide the original number of segments by the original link group and then allocate the year-on-year number according to the member link rate, or The original packet is divided into segments of a corresponding proportion according to the transmission rate of each member link.
  • the present invention proposes an effective wireless system that minimizes end-to-end transmission delay and wireless network device complexity without requiring a dedicated access server.
  • Method and system for interface multi-link aggregation At the same time, the present invention occupies only one IP address when accessing an APN (access point) by using multiple links, thereby saving limited IP address resources.
  • a wireless communication system comprising: a client device; a radio access network linked to the client device through an air interface (Uu); a GPRS packet data network; and an external packet data network
  • the GPRS packet data network includes a Serving GPRS Support Node (SGSN) and a Gateway GPRS Support Node (GGSN); wherein: the user terminal device supports multi-link aggregation, and the gateway GPRS support node supports multiple links; The road gathers.
  • SGSN Serving GPRS Support Node
  • GGSN Gateway GPRS Support Node
  • a method of transmitting data in a wireless communication system comprising: a client device; wireless access linked to the client device over an air interface (Uu) a GPRS packet data network; and an external packet data network; wherein the GPRS packet data network includes a Serving GPRS Support Node (SGSN) and a Gateway GPRS Support Node (GGSN); the user terminal equipment includes at least first and second a wireless Modem pool portion, a link control unit, and an application portion of the wireless Modem; and the gateway GPRS support node supports multi-link aggregation; the method includes the steps of: (a) the first wireless Modem passes a packet data protocol context The activation process establishes a first PLMN bearer channel; (b) the second wireless Modem establishes a second PLMN bearer channel by a packet data protocol context activation procedure; (c) converges the first and second PLMN bearer channels into one ML-PPP logical link
  • Figure 1 is a schematic diagram of the structure of the MAR network
  • FIG. 2 is a schematic diagram of a UMTS network structure
  • 3 is a system for implementing wireless interface multi-link aggregation based on the present invention
  • Figure 4 is a schematic diagram of multi-link aggregation when IP interworking and PPP termination are adopted;
  • FIG. 5 shows a multi-link aggregation signaling procedure when the GGSN and the external packet data network adopt IP interworking
  • Figure 6 shows an option structure of the endpoint discriminator
  • FIG. 7 shows a multi-link aggregation signaling procedure when the GGSN and the external packet data network communicate with each other in the PPP termination mode
  • FIG. 8 is a schematic diagram of multi-link aggregation when the PPP relay mode is adopted.
  • Figure 9 shows the multi-link aggregation signaling flow when the GGSN communicates with the external packet data network using the PPP relay mode.
  • the packet domain UMTS network mainly includes two parts: a UMTS radio access network (UTRAN) and a GPRS packet data network, wherein the UTRAN is composed of a Node B (Node B) and an RNC (Radio Network Controller), and the GPRS packet is formed.
  • the data network consists of an SGSN (Serving GPRS Support Node) and a GGSN (Gateway GPRS Support Node).
  • the UE User Equipment
  • the UE User Equipment
  • the air interface that is, the Uu interface
  • the UTRAN is connected to the SGSN through the Iu-PS interface.
  • the interface between the SGSN and the GGSN is a Gn interface
  • the interface between the GGSN and the external packet data network is a Gi interface.
  • the UE can be further divided into TE (terminal equipment) and MT (mobile terminal) in structure, and the function of the UE side Uu interface protocol is completed by the MT.
  • TE terminal equipment
  • MT mobile terminal
  • FIG. 3 shows the system architecture for implementing multi-link aggregation in a UMTS system based on the present invention.
  • the user equipment is a user equipment supporting the multi-link aggregation function shown in the figure, and the user equipment is structurally divided into a wireless modem pool part, a link control unit, and an application part.
  • the wireless modem pool is composed of a plurality of independent wireless modems, and each wireless modem has different IMSI (International Mobile Subscriber Identity), and independently performs the function of the UE-side Uu interface protocol, that is, the respective maintenance and the UMTS access network and the core network.
  • IMSI International Mobile Subscriber Identity
  • the link control unit is responsible for aggregating the links corresponding to the respective wireless modems, and is responsible for the link management and control functions;
  • the application part includes the functions of the application layer of the user terminal.
  • the radio access network part is the same as the prior art, and the GGSN adds support for multi-link aggregation in comparison with the prior art in the GPRS packet data network part.
  • the interworking between GGSN and external packet data networks is typically divided into IP and PPP types, which are respectively classified into IP transparent transmission and IP non-transparent transmission, and PPP termination and PPP. Relay mode.
  • the specific intercommunication method is usually determined by the interconnection agreement between the PLMN (Public Land Mobile Network) operator and each APN corresponding Intranet/ISP.
  • PLMN Public Land Mobile Network
  • the IP transparent/non-transparent transmission mode the user is grouped into an IP packet, and the GGSN is equivalent to a router for the external packet data network.
  • the GGSN performs IP address assignment and user authentication via the Radius and DHCP (Infrared Service Provider) Radius and DHCP servers through the Radius Proxy and DHCP (Dynamic Host Configuration Protocol) proxy functions.
  • the UE shall attach the IE (Information Element) option of the "Protocol Configuration Option" when initiating the activation of the PDP Context request, and the SGSN transparently passes it to the GGSN, which carries the user in the IE.
  • Information such as user accounts necessary for authentication to the intranet/ISP.
  • the user group is a PPP packet, and the PPP connection mode PPP connection is established between the GGSN and the TE.
  • the GGSN passes the Radius proxy and the DHCP proxy function via the intranet/ISP.
  • the Radius and the DHCP server perform IP address allocation and user authentication, but the user account and other information required for authentication and the IP layer protocol configuration are transmitted by the LPP/NCP protocol of the PPP connection; the PPP connection mode PPP connection is established between the ISP and the TE.
  • the GGSN transparently forwards the PPP packet to the intranet/ISP through a tunneling protocol such as L2TP (Layer 2 Tunneling Protocol), and the functions such as IP address allocation and user authentication are performed by the Intranet/ISP.
  • L2TP Layer 2 Tunneling Protocol
  • the multi-link aggregation implementation is as shown in FIG. 4.
  • the wireless modems of the user end are respectively activated by the PDP Context to establish independent PLMN bearer channels, and the link control unit is responsible for implementing multi-link aggregation of the PLM bearer channels corresponding to the MM-PPP-based wireless modems on the user side, and the network side is based on
  • the multi-link aggregation function of the ML-PPP is implemented at the GGSN, and the user IP packets are transmitted through a logical link aggregated by multiple links.
  • the ML-PPP multi-link function is transparent to the existing protocol operation, that is, exists in multiple
  • the above-mentioned PLMN bearer channel provides logically aggregated links for IP packets without changing the signaling related to the operation of PDP Context activation/deactivation, as described in TS24.008 and TS29.060, nor Affects the operation when the GGSN and the external packet data network according to TS 29.061 use IP interworking.
  • FIG. 5 takes the case of two wireless modems as an example, and shows a multi-link aggregation implementation signaling flow when the GGSN and the external packet data network adopt IP interworking.
  • the two wireless modems perform initialization operations such as GPRS attachment and PLM authentication, respectively, when the UE applies part.
  • Modem #1 When accessing the external packet data network through UMTS, Modem #1 will establish a PLM bearer channel according to the PDP Context activation procedure described in TS24.008 and TS29.060. That is, as shown in FIG. 5, the Modem #1 sends an "Act ivate PDP Context Reques t" message to the SGSN to which it is attached, where the static IP address is allocated according to the 3GPP specifications.
  • the PDP address in the message is the static IP address assigned by the UE. In the case of the dynamic IP address allocation, the PDP address in the message is empty. In addition, the IP non-transparent transmission mode is used.
  • the message shall carry the IE option "Protocol conf igurat ion opt ions"; then, the SGSN sends a "Create PDP Context Reques t" message to the GGSN, for the IP non-transparent transmission mode, the IE option "Protocol” Conf igurat ion opt ions" will be transparently passed to the GGSN for ISP/Intranet authentication.
  • the GGSN After the GGSN completes the process of IP address allocation, authentication, etc., it sends a "Create PDP Context Response" message to the SGSN, and then the SGSN will communicate with the UTRAN and establish a corresponding RAB (Radio Access Bearer). Finally, the "Act ivate PDP Context Accept” message is sent to Modem #1, and Modem #1 will indicate that the UE side ML-PPP entity has successfully established the PLMN bearer channel.
  • RAB Radio Access Bearer
  • the UE side ML-PPP entity when the UE decides to activate Modem #2 to increase the transmission bandwidth, the UE side ML-PPP entity will notify Modem #2 to activate to add a PLMN bearer channel, and Modem #2 will be as described above.
  • the step is to establish a corresponding PLMN bearer channel, where the PDP address in the "Act ivate PDP Context Reques t" message sent by Modem #2 to the SGSN to which it is attached is assigned to the static IP address, and the PDP address in the message That is, the same static IP address assigned by the UE, and the allocation of the dynamic IP address, that is, the IP address assigned by the network when the PLMN bearer channel is established by Modem #1.
  • Modem #2 will no longer carry "Protocol conf igurat ion opt ions" in the "Act ivate PDP Context Reques t" message, thus avoiding repeated ISP/Intranet authentication operations on the UE by the GGSN.
  • the Modem #1 first initiates the ML-PPP entity in the GGSN.
  • a basic PPP link is established on the PLM bearer channel, and the ML-PPP entity in the GGSN initiates a second PPP link on the built-in PLMN bearer channel and requests the link and Modem. 1
  • the corresponding basic PPP links are aggregated into one ML-PPP logical link bundle.
  • the establishment of the PPP link on the PLMN bearer channel corresponding to Modem #1 is also It can be performed after Modem #1 completes the establishment of the PLMN bearer channel (as shown in step 6 in Figure 5).
  • Modem #1 completes the establishment of the PLMN bearer channel (as shown in step 6 in Figure 5).
  • the user packet increases the PPP header overhead, it has a slight impact on the transmission efficiency, but this operation mode will be The user plane is processed, that is, it is not necessary to judge whether the PPP header is attached or the corresponding processing in the user data transmission process.
  • a wireless modem may establish a PLMN bearer channel having multiple PDP addresses (here, IP addresses) but connecting different APNs, in order to indicate the required bundle to the GGSN
  • the bundled PLM bearer channel needs to be authenticated by the combination of the APN and the UE's IP address in the ML-PPP LCP option "Endpoint Discriminator".
  • the structure of the LCP option "Endpoint Di scriminator" is as shown in Figure 6, where the Type field identifies the LCP option and the Length field is the byte length of the LCP option.
  • the Class field indicates the type of the Address field used to identify the ML-PPP endpoint, where the assigned Class field value is 0-5, as defined in Table 1.
  • the present invention requires endpoint authentication using APN in combination with a corresponding IP address.
  • the present invention defines two Class field values (such as values 7 and 8 in Table 1), and two corresponding ones.
  • the Address field (such as "GPRS Endpoint Identity 1" and "GPRS Endpoint Identi ty 2" in Table 1) corresponds to (IPv4 address + APN) and (IPv6 address + APN) respectively. Since the maximum length of the APN is 102 bytes, Therefore, the maximum length of these two Address fields is 106 bytes and 118 bytes, respectively.
  • the multilink aggregation structure is still as shown in FIG. 5.
  • the PDP type is PPP, that is, the user PPP packet is seen by the UMTS network.
  • the operation of the PPP termination mode of the GGSN and the external packet data network described in TS29.061 is changed, that is, the corresponding operation should be increased.
  • Support for ML-PPP In the multi-link aggregation signaling flow using the PPP termination mode shown in Figure 7, the PLMN bearer channel corresponding to Modem #1 is still established as described in TS24.008 and TS29.060, and then in step 6, such as TS29.
  • a corresponding PPP connection is established on the PLMN bearer channel, and the LCP should carry the corresponding ISP/Intranet authentication option for ISP/Intranet authentication when establishing the PPP link, and also needs to run the PPP NCP protocol ( IPCP/IPV6CP) Obtain the IP address assigned by the ISP/Intranet.
  • IPCP/IPV6CP PPP NCP protocol
  • Modem #2 when the UE decides to activate Modem #2 to increase the transmission bandwidth, the L-PPP entity on the UE side will notify Modem #2 to activate to add a new PL ⁇ bearer channel. At this time, Modem #2 will establish the corresponding PLM.
  • the PDP address in the "Act ivate PDP Context Request" message sent by Modem #2 to the SGSN to which it is attached, and the PDP address in the message is the same as the above.
  • the static IP address assigned by the UE is allocated to the dynamic IP address, that is, the IP address assigned by the network when the PLMN bearer channel is established by Modem #1.
  • the corresponding PPP connection will be established on the PLMN bearer channel.
  • the LCP no longer carries the corresponding ISP/Intranet authentication option.
  • IPCP/IPV6CP IPCP/IPV6CP
  • Modem #2 will carry the LCP option of the ML-PPP when the PPP connection is established.
  • the LCP option "Endpoint Di scr iminator" of ML-PPP uses the combination of APN and corresponding IP address for endpoint authentication.
  • the multi-link aggregation structure when the GGSN and the external packet data network are intercommunicated by the PPP relay mode is as shown in FIG. 8.
  • the operation of the GGSN completely follows the PPP user packet on the PPP link corresponding to each wireless modem corresponding to the L2TP tunnel, as described in TS29.061, and the multi-link aggregation function is implemented on the access end of the ISP/Intranet.
  • the multi-link aggregation signaling process in this mode is similar to the multi-link aggregation signaling process in the PPP termination mode, as shown in Figure 9. The difference is that the ML-PPP entity exists on the access end of the ISP/Intranet.
  • the Node B, the RNC, and the SGSN to which the wireless modems of the user equipment supporting the multi-link aggregation function are connected may be different, even if the wireless modems are different.
  • the SGSNs are connected to the same SGSN and access the same APN. In the prior art, the SGSN may access the APN through different GGSNs when the PDP Context of each wireless modem is established due to load sharing.
  • the "At" initiated by the UE to the SGSN In the IE "MS network capabi ty" of the tach Reques t" message, a new bit value is added to indicate to the attached SGSN whether the UE has multi-link aggregation capability
  • a unique GGSN is allocated in a packet domain, and all UEs in the packet domain that access an APN supporting multi-link aggregation function are responsible for accessing the APN by the GGSN.
  • the SGSN in the packet domain obtains all the PDP Context establishment requests initiated by the UE after successfully completing the GPRS attachment of the UE with the multi-link aggregation capability, and obtains the above-mentioned unique responsibility corresponding to the APN according to the APN accessed by the SGSN.
  • Multi-link aggregation and access to the address of the GGSN of the APN so as to ensure that all UEs in the packet domain that access the APN supporting the multi-link aggregation function establish a PLMN bearer channel with the GGSN.
  • FIG. 5 and FIG. 7 only show a multi-link aggregation signaling procedure for adding a new PLM bearer channel for increasing bandwidth
  • combining the present invention with the prior art signaling flow may be To complete the operation of deleting the existing PLMN bearer channel by reducing the bandwidth, or modifying the attributes (such as bandwidth) of the PLMN bearer channel.
  • the multi-link may adopt a static configuration method, that is, the corresponding link establishment operation is started after the UE is powered on, but in order to make full use of the radio resources, preferably, The link adopts a dynamic control method.
  • the user equipment supporting the multi-link aggregation function is preferably responsible for the following intelligent processing:
  • ⁇ Performing statistics on the average traffic of the uplink and the downlink, where the average uplink and downlink traffic refers to the time average of the data traffic sent (or received) by the UE in the uplink (or downlink) direction for a period of time;
  • uplink and downlink utilization is the ratio of the average uplink-downlink traffic to the current total link bandwidth, and compares the link utilization with the predetermined threshold to increase or decrease the link bandwidth.
  • the wireless modem pool when it is necessary to activate or deactivate the modem to increase or decrease the link bandwidth, make a selection of the modem that needs to be activated or deactivated. For the activation, the corresponding PL ⁇ bearer channel should be determined. Properties (such as maximum rate, etc.).

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)

Abstract

L'invention porte sur un système de communications radio comprenant un terminal utilisateur, un réseau d'accès radio en liaison avec le terminal utilisateur par l'intermédiaire d'une interface hertzienne (Uu), un réseau GPRS de paquets de données et un réseau externe de paquets de données, le réseau GPRS de paquets de données comprenant un noeud GPRS supportant un service (SGSN) et un noeud GPRS supportant une passerelle (GGSN). Le terminal utilisateur supporte une convergence de plusieurs liaisons et le noeud GPRS supportant une passerelle supporte une convergence de plusieurs liaisons. Le procédé de transmission de données consiste à: établir un premier canal d'acheminement PLMN par un premier modem radio au moyen d'un procédé d'activation du contexte de protocole de paquets de données; établir un second canal d'acheminement PLMN par un second modem radio au moyen d'un procédé d'activation de contexte de protocole de paquets de données; faire converger les premier et second canaux d'acheminement PLMN dans une liaison logique ML-PPP et transmettre des données par la liaison logique.
PCT/CN2004/001548 2004-12-28 2004-12-28 Procede et systeme de realisation d'une convergence de plusieurs liaisons dans un systeme umts WO2006069479A1 (fr)

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PCT/CN2004/001548 WO2006069479A1 (fr) 2004-12-28 2004-12-28 Procede et systeme de realisation d'une convergence de plusieurs liaisons dans un systeme umts
CNA2004800447645A CN101091335A (zh) 2004-12-28 2004-12-28 在umts系统中实现多链路汇聚的方法与系统

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PCT/CN2004/001548 WO2006069479A1 (fr) 2004-12-28 2004-12-28 Procede et systeme de realisation d'une convergence de plusieurs liaisons dans un systeme umts

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WO2012000271A1 (fr) * 2010-06-29 2012-01-05 中兴通讯股份有限公司 Procédé d'accès à un terminal et réseau de communication sans fil
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CN115695895A (zh) * 2021-07-21 2023-02-03 成都极米科技股份有限公司 提高数据传输速率的方法、装置、设备及存储介质
CN115695895B (zh) * 2021-07-21 2024-05-10 极米科技股份有限公司 提高数据传输速率的方法、装置、设备及存储介质

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