TWI239170B - Methods and apparatus for supporting session signaling and mobility management in a communications system - Google Patents

Abstract

A mobile communications system that uses IP packets to transmit data between end nodes, such as mobile devices, is described. In order to facilitate session establishment, maintenance, security, and handoff operations, access nodes through which end nodes communicate with one another include a session signaling server module and a mobility agent module. The session signaling server module may be implemented as a SIP server while the mobility agent module may be implemented using Mobil IP signaling. The mobility agent and SIP server within an access node are identified using a single shared identifier, IP address. The same security method and common secret may be used to provide security with regard to both mobile IP messages and SIP messages. Sessions admission decisions and resource allocation for admitted sessions can also take place internally to the access node of this invention without need for signaling to external elements.

Description

1239170 V. Description of the invention Π) Field of the invention The present invention relates to a method and a device for establishing a data communication stage. Regarding the establishment of a data link segment through access nodes in a multi-node network: method and implementation, such as a Cellular networks, where the mobile terminals "communicate with each other through access points and with other terminal systems. BACKGROUND OF THE INVENTION The Internet Protocol (Internet Protocol) is designed to make a different computer It can be used as a packet exchange connection with the set of communication networks. A latent and variable network and link layer technology set is connected to each other through nodes, such as a gateway (or router), and provides a packet t forwarding service (packet t forwarding service). ). Information is transmitted between terminal nodes (or hosts) in a block of data called a datagram, where both the source and destination hosts are identified by a fixed-length address. The path in the network The choice is essentially connectionless transmission, because data packets are forwarded in a hop-by-hop manner between routers using the destination address in the data packet. The Internet Protocol (Mobile IP, reference: ietf RFC 2 00 2) enables an IP host (also known as μ mobile node lf in the case of Mobi 1 e IP) to dynamically change its connection in the network. Point, but still keep it accessible by a pre-assigned home address (h 〇meaddress). To achieve this, when the mobile node visits a foreign network, It will be given a temporary local end address or a care-of address. " In some cases, the referral position is obtained through a π foreign agent (forei gn agen t), and in other cases

Page 4 1239170 V. Description of the invention (2) 'The care-of address can also be directly assigned to the action node. The care-of address is then registered with a node in the local network called " local agent (h 0 m e a g e n t) π. The local agent will block all the packets destined for the local address of the mobile node, and then change the direction of these packets to the mobile node through encapsu 1 ati η and tunneling. The visited address of the visited network (visitednetw 〇rk). After transmitting to the care-of address, the encapsulation is removed, and the original packet originally intended to be transmitted to the local address is transmitted to the mobile node. The Session Initiation Protocol (SIP, Reference: IETF RFC 2 543) enables end nodes or users to establish a data communication phase. SIP is a client / server communication protocol, which mainly includes the request and response of the 2 land exchanges. A SIp transaction (transacti〇n) is generally composed of 0 requests / responses. Q SIP uses application-level routing (r0Utlng). 3 1 F talks in two "useless" | 1 user agent (user agent) 丨You can skip the intermediate processing node selection during the transmission ^ Putian goes to A w P ”, the nodes are called SIP servers. S IP 夹 果 夹, 私 6 — Γ Check and process the message according to ^? The header area is passed to the SIP node.-The heart uses the normal network layer routing mechanism to switch to the SIP server. The two enterprise networks or Internet service providers can support the user agent in 7 stages of establishment. Implement the policy (po 1 i cy), or move the user agent (111〇 丨) 1 Hl: y). The SIP mobile support mechanism borrows the IP server to register to a local with the current position information of 1 (ReachabUitn, #reachability of the user agent in the network. No location information may be identifying the user agent

Page 5 1239170 V. Description of the invention (3)

The position of the person or another S I ί server position (such as a s i P server in the visited (v 丨 s 丨 七 e d) network) that the request of the user agent should be served. The SIP server in the local network can send any request to the user agent based on the currently registered location information. Q Voice over Internet Protocol in a cellular data network (voi ce over IP), and to support services requires a mobile management mechanism and a stage-building mechanism. Figure 1 illustrates a simple combination of Mobile IP and SIP. The system 100 is not necessarily a conventional art, but it will be discussed here to explain MobUe IP and SIP. The system 100 includes a plurality of access nodes 114, 126, and each access node 114, 126 provides a plurality of fixed terminals through corresponding access links (118, 120), (122, 124), respectively. Nodes (160, 162), (164, 166) are connected. The interactive connection between the access nodes 114 and 126 is provided by the network link = 6, 108 and an intermediate network node. This network also includes a SIp server node 1 1 2 connected to an intermediate network node 10 2 via a network link 110. This intermediate network node 102 also provides a connection to another network 128 through a network link, wherein the network 128 is a terrestrial network to the terminal node χΐ62. The local network 28 includes a Mobi e Ιρν4 local agent node 130 and a local SIp server node 132, each connected by a network link 1 34, 1 3 6 to an intermediate network node 丨 3 8 . The intermediate, weekly nodes 1 38 in the local network 28 also provide external network links to the local network lj 8 through the network link 104. In the system 100 shown, s I p servo = 1 ^ 2 and 132 are actually different and are located away from the access node 14, j 26 phase § 逖, so when any one server 丨 丨2, 1 3 2 needs to follow

1239170 V. Explanation of the invention (4) When the access nodes 1 1 4 and 1 2 6 function, external signalling is required between the server bodies. Due to the position of the server 1 12, 132 relative to the access node 11 4, 1 2 6, when a SIP server 1 1 2, 1 3 2 needs to interact with one of the components of the access node 11 4, 1 2 6 , Undesired delays can occur. In the system 100, 'the terminal node X 1 6 2 uses MIMO 1 e IP to maintain its reachability' and its current network connection point is the access node 11 4 in the visited network. The terminal node XI 62 then registers the address associated with the Mobi 1 e IPv4 foreign agent module 1 1 6 of the access node 1 1 4 as the care-of address of the local agent 1 300 in the local network. Finally, the same point X1 6 2 also registered a visit to the location of the IP server 11 2 and the local S IP server node 1 2 2 in the local network 1 2 8 on the same day. Therefore, the local SIP server 132 will forward the SIP request for the terminal node XI 62 to the visited SIP server 1 1 2. The dotted line in the figure indicates that the phase from the terminal node γ 1 6 to the terminal node X1 6 2 starts, and its SI P request and response path. The terminal node Y1 6 6 transmits a start request message 1 40 to the local s IP server 132 of the terminal node X 1 6 2. The local SIP server 132 then transmits a request message 1 42 to the visiting SIP server 112 based on the registered location information. After receiving the request message 1 42 sent by the local SIP server 1 32, the visiting feeder 11 2 sends a request message 1 4 4 to the local address of the node X 1 6 2. This request message 1 4 4 is forwarded back to the local network 1 2 8 of the terminal node χ 丨 62 through the normal network routing, and is stopped by the local agent 130. The local agent 1 3 0 encapsulates the request message 1 4 4 and then uses the channel technology to transmit the encapsulated request message 1 4 6 to the foreign agent 11 6. After receiving the encapsulated request, 1239170 V. Description of the Invention (5) After requesting the message 1 4 6, the agent 1 1 6 in the place sends a request message 1 4 8 to the terminal node X 1 6 2. After receiving the request message 1 4 8, the end node 16 2 returns a response to Y 1 6 6 through the same set of SIP intermediate servers that process the request. This is partly because during the transmission of the request, the SIP server 132, 112 information used to identify the request was added to the request 142, 144. Therefore, the terminal node X1 6 2-from the beginning, sends a response message 1 50 to the visited SIP server 1 12. The visiting SI IP server 1 1 2 then sends a response message 1 5 2 to the local SI IP server 1 3 2. After receiving the response message 152 from the visiting SI IP server Π 2, the local SI IP server 1 3 2 sends a response message 154 to the terminal node Y166. However, if Mobile IP is operating in reverse tunneling (reverse tunneling) mode, the response path may be more devious (see IETF RFC 2 344). Although another response signaling path does not appear in this figure, the situation when using the reverse channel mode will be briefly described below. Different from the direct sjp server which is sent to the visitor, the response sent by the terminal node X1 6 2 is first encapsulated and then communicated. The technology is transmitted to the local agent 1 3 0, and the local agent 丨 3 〇 After unpacking, return the visited SIP server directly. The signaling path after visiting the SIp server is the same as before, and it is transmitted to the local s 丨 p server 1 3 2 and finally to the terminal node Y1 66. This system 100 clearly states that a data communication phase is to be established between the terminal node 166 and the terminal node. The related s 1 ρ request / response order is an inefficient and circuitous transfer. The system has many other lack. ° points, especially regarding phase admission control, resource allocation and mobile support

1239170 V. The main difficulty of permission control in paragraph (β) of the invention is that the permission control and policy decision points are not consistent with the permission control and policy enforcement points. Especially when the SIp server 1 1 \ '1 3 2 establishes signaling and effectively plays admission control and policy decision point in the processing stage, it is not on the path of session data traffic, so it cannot be used as admission control. And policy decision points. Note that data session traffic does not pass through the server ^ 2, 132 because they are only used for phase signaling. In addition, because the SIp server 2 and I 32 are not on the data path, if there is no additional control mechanism, the signaling flow at this stage can easily bypass them. Admission control and policy enforcement can be more effectively applied to access nodes 1 1 4 and 1 2 6 but this requires additional signaling between the § IP servers 112, 132 and the access nodes 114, 26 ° Greatly increases the complexity of the Delta Hai system 100. Similarly, from the perspective of resource allocation, because the SIP servers 112 and 132 are not on the data path, it can be controlled at noon to decide that it cannot successfully provide the available system resources to support the requested data communication phase. In a wireless communication system, information about the resources available on the access nodes 4, 1, 2 β and the access links 118, 120, 122, 124 is very important. The SIP server still needs to incorporate the information of the access nodes and the resources available on the link into the system's license control decision! The additional signaling between 112, 132 and the access node II 4 '1 2 6 also increases the complexity of the system. Finally, supporting mobile with each of the above signalling requires additional mechanisms to allow a terminal node 160, 162, 164, 166 to move during phase establishment. In addition to increasing the complexity of the system 100, additional signaling is used between the SIP server 11 2 '1 32 and the access nodes 11 4 and 12 6 to address this. Page 9 1239170 V. Description of the invention (7) Some problems will also increase the phase of establishing the data communication; the bandwidth used by the link is reduced, so the system is reduced, and the network is increased. According to the above discussion, 彳 ㈣ obviously uses packet transmission. Method and device to support terminal node movement, and many other methods and devices related to the establishment and maintenance of communication phases; the summary of inventions and inventions in the communication phase; King of Mobile Management. The access node can support the interface between the segment signaling and the mobile tube receiver and transmitter to support the following two aspects: it has-including = point communication. The access node can communicate with the wireless base station. The access interface may include a circuit in a u-nest communication system for connecting two or more right 2f fetch points. For example, if a network is completed with 2 nodes according to the present invention, the terminal node may pass through this branch. Save f or access segments of the present invention. The terminal node may be a package that can establish and guide the communication stage to complete-the access node contains-a single _ :: (2) f set. According to the module and a mobile agent module. =, 〃, one stage letter also includes-verification module, network: 4_ In some implementation examples, the access section mask module can be the beginning of a stage: = and status information. The stage 4 manager module can use a Moblle server), and the mobile generation of the access node of the present invention is different and completed. These include-according to the z n ’allowed by other parts of the access node to allow per-mode% source and status to be seen by each other, 1239170 V. Description of the invention

Use and update. Compared to the Aunt „„. A, ntb LU 1 system in Figure 1, the extremely similar system enables the phase of the interposition to begin. Seven aids 0 Ming 'By using a single-common identifier, a device (such as a node) external to the female f can identify the stage ^ can be: free, ^ agent module. From the perspective of a terminal node and tracking the path of two different addresses to simplify the communication about === nicknames and a plurality of terminal nodes: Among the terminal nodes-or multiple nodes built; The position of the signaling feeder module can be used to confirm the use of the same security order server module and mobile agent module. 'Ten, in one embodiment, the verification module enables fish = The same shared secret of the oral module message, such as verification or transfer to verify the message of the signaling server module in the previous stage A = key secret. The shared secret is stored in the memory of the access node. In the example of the described embodiment, the signaling server module is based on the same access node :: state information provided or saved by the group within the node to be ordered by the mobile terminal. The information saved by the mobile agent module can be transferred or switched to the address of the access node-the line transfer procedure includes, for example, signal restructuring (reiormattin3 $ Guanshi example flood number processing-usually by signaling The server module executes the IP address, but it can also be separated by a remote IP address. Signaling feed, so that the end node is used. It should be used in the mobile communication generation phase of the legislation. For example, the mobile agent secret value, in the example, the In the stage of the human model, the rationale.

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1239170 Fifth, the invention says ψ〗 (9) Even in the access node, the access node should be at least ^ [and implemented. In this way, the installation position of the present invention (such as a mobile agent, and the mobile management system can be avoided in the same situation), and the phased feeder unit module is longer in the same 3 views. The relay is light. The position is closed, and there is another phase II: The common permission and resource allocation of the phase signaling module and other modules are performed under the condition of ‘Needs:-: Some or all of the local phase signaling is performed. External components of the access node of the present invention In the present invention, another advantage of the access node is that, even in the case of a common position relationship node of 玖 π 1: -Bexun, such as in the switching process ,,, :: :: Make their network access smooth. This can be achieved by storing the status of the signaling operation at the current stage, such as sequence, communication, service, and communication, setting, security, etc., and then transferring at least part of the status information to the parameter status points of ^ fengt. . According to the present invention, when the terminal node starts to switch from the access point of the sun to a new access node, if the switch occurs, the access node moves, and the transfer of the ^ ir access node gate ηκ can be switched during At the beginning, ^ parent change. The state resource point "Lion action agent module will send the signaling message of the node in the previous section to the new access section according to the state, and the current storage will be saved due to the new-in real time And effective way to relay. At this stage, the signaling information will be transferred between the current node and the new access point 2 or part of the status can be determined at the beginning of the handover. Two days "and then changed. Status information Retrieval can be relayed in an instant and effective way. ... Ύ In some embodiments, the mobile agent completes IP signaling. In a specific embodiment, the mobile agent is completed using a Mobile M IPv4 foreign agent, and in another example, the mobile agent is aw. In the example, the mobile agent is 1239170 V. Description of the invention (10) The person is completed by a MIPv6 suite . In the present invention, the modules in the access point are completed using software, hardware, or a combination of software and hardware. In the example implemented in software, the module contains no :: instruction or instruction set to control the hardware (such as a circuit) to complete each one. Swap different actions performed by the group. Many embodiments, features, and advantages of the inventive method and apparatus are discussed in detail below. Order a detailed description of the invention ~ ΓΛ description; 'Example of an access node 200 according to the present invention. In FIG. 2, the IV node 2 ° includes a round-in / output interface 201, which is a processor 203 and a memory 212. M, 203 ', 212', 205 of the sub-nodes are all located in a body 211, such as a plastic shell ', with an inner element 2101, 203, 212, and 205 surrounding it. 1 0 ^ r ^ ^ ^ T-^, Λ,, Π ^ ^ S2 ° 1 丨 meaning 廿; that is, the internal components in point 2000 can read and receive external devices and network nodes, including such as-receiver circuit . ; „Interface 201 is connected to other network nodes: node 2 °° and point, such as through the no-message channel 4 and connected to the terminal node, the processor 2 03 receives more in the memory 212: can be combined; = store: r = to perform unintended ancestral inspection, and other actions discussed below. Memory

Page 13 1239170

V. Description of the invention (11) The modules in (m) are executed at startup or by other modules. The module can also be sub-poor. In the embodiment of FIG. 2, the access-saving state information of the present invention includes: a verification module 208, resource information and status 2016 ^ -5 / news 206, such as a parameter, an access node 200. The limitation of the poor source inside and its interface, indicates that the stage description in the general promotion d… is carefully described, or the source has been used, or the access node 200 and its interface 2 Information 210 includes parameters such as, In the communication stage, U1 and U1 are used. Status information, or other interactions with terminal nodes or for winter use ^ status information ’to communicate with the access node or another device. … Off the poor news, or with-for 4 and k make the server module 2 〇 $ 今 今 π Α / Γ start the operation, such as processing the received, use Permission / Archive to get ^ number or message and send Mind needed later: The server module m in the data communication phase can also support the phase maintenance and 1 or / y. Signaling in this phase: permission control step, start in one phase: bundle two: will be considered And keep track of available resources. 0 ”allows the servo to access and update the server retained in the memory 212, which can be allocated to the remaining stages of the ongoing stage ㈣m ° 'If not transferred, the stage establishment and promotion 2 can be completed by many methods. In the figure 2 embodiment; Hai mobile generation

Page 14 Point mobile and link management: ... 0 2 allow two deposits = 1239170

V. Description of the invention (12) The button module is completed. As shown in the figure, the mobile agent module 202 includes sub-modules 24 2, 244, 246, which are respectively-MobUe Ipv4 foreign agents, a Mobile IPv6 suite, and a host routing agent. With sub-modules 24 2,244, the mobile agent module 202 can support multiple versions of Mobile IP signaling, including MobUe IPv4 & MobUe lpv6 signaling. In different embodiments, the mobile agent module 202 includes a subset of the submodules 242 '244 and 246 in FIG. For example,

In the embodiment of MobUe IPv6, the MobUe Ipv6 suite sub-module 244 can be omitted. As shown in FIG. 2, examples of the mobile agent module 202 include, /, and 1. ^. A guide, a content transfer group, is used to perform information transfer actions such as status, as part of cutting f (! A = f). When an end node changes its connection point from the predicate to another access node or vice versa = 248, a switch is known to support the access of the end node from an access memory 2 i 2 " he V: two The status information of the special transport 21 ° includes the status information provided by the special "ren Λ: k. The status information 210 is also t = she: 器 模 _provide the sound ^ 仳 0 / + and establish the state of evil, and verify the status and The safety-relevant status provided by the verification module 208. In this article, ... and 208 = ΐ: status information of the node or communication stage is widely described in the present invention: ^: 个 =: I :: ΐ 2 〇2 can include additional sub-modules to reduce the size. In another optional embodiment, and the content transmission

Page 15 1239170

5. Description of the invention (.13) 1 function can be completed by a separate module in the memory 2 12, which is different from the sub-module in the mobile agent module 202. The verification module 2 〇 contained in the memory 21 2 of the access node 2 〇 is available for final inspection. 'It is connected to the access node 2 through this round-in / output interface 2 0 1 = other network nodes and Messages and signals from end nodes. The verification branch group 208 also provides verification services for other modules and submodules included in the memory 212 of the access node 200. Therefore, the verification module 208 can check the validity of the messages and signals received by other modules and sub-modules in 体 丨 Thinking 2 12, such as the phase signaling server module 204. The verification module function can be directly incorporated into other modules or sub-modules instead of a separate module 208. In an access node 200 that can easily access the resource information 2 06 and the status information 2 10, one of the phases of the main body 211 is combined with a signaling server module 2 04 and a mobile agent module 2 2 and the verification module 208 have significant advantages over the system shown in Figure 1 in terms of the complexity of the signaling establishment and maintenance. Also, the modules in Figure 2 are completed by software, but each module 204, 208, and submodules can also use hardware, software, or software and hardware, and 5. The present invention describes the modules, sub-modules, private, hardware, or hardware and software combinations that can perform the two-person function described. According to a specific embodiment described in this description, this stage signaling 2/4 is a SIP (Stage Initiation Protocol) server. In a specific group, the access node 200 may be a wireless access router which can support ~: 歹:, Internet confusion data packets. In such an embodiment ^ (the network is called containment circuit, such as receiver / transmitter circuit

1239170 Five 'invention description (14) One point is to use wireless communication technology to connect to the access node 200, such as through a wireless communication channel. In such an embodiment, the range covered by the access node is called a communication " honeycomb ". In another embodiment, the signaling server module 204 at this stage transmits, receives, and processes signals according to other communication protocols such as the Resource Reservation Protocol (RSVP). In some embodiments, the signaling server module 204 at this stage may support SIp and RSVP signaling. In some embodiments, the human / output interface 2 (H includes a circuit that allows terminal nodes to connect to the circuit through wired, wireless, or a combination of the two communication technologies. FIG. 3 illustrates an example system 400 that includes a plurality of The access nodes 2 00, 200,, 2 0 0 ”completed according to the present invention. FIG. 3 also shows a communication honeycomb 30 ° ^ 30 0, 300", which surrounds each access node 200, 200, , 2 00, and respectively represent the range covered by 20, 2 0 ', 2 0 π. Elements of the same entity and function are also drawn in each fixed communication honeycomb. Therefore, the following = around the access node 200 The description of the components in Honeycomb 3000 can also be directly on each of the honeycombs 300, 300, 300. The access node 2000 drawn is moved from the access node 2000 in Figure 2. Simplified representation. In Figure 3, the access node 2000 has an agent module 2002, a phase signaling server module 204, and a verification module — resource information 206 and status information 210. The other components are not shown. The material Danjintou 207 is used to represent the relationship between the components of the edge and the other resources. Signal exchange. Although the input / output interface 2 0 1 is not shown in Figure 3, the connection between the access node and other network nodes is drawn and will enter 3 QV 5 inch theory. Figure 3 illustrates the access node 2 0 0 provides a connection with a plurality of N terminal nodes with corresponding access links 3,06,8.

1239170 V. Description of the invention (15) The interactive links between the access nodes 2 0, 2 0 0 ', 2 0 "are provided by the network links 310, 311, 313 and an intermediate network node 32. This Intermediate network node 320 also provides a link to another network 33o through network link 322, 'This network 330 is the local network of terminal node X304. This local network includes a local mobile agent node 332 and A local phase signalling node 334 is connected to an intermediate network node 336 via network links 338, 34 respectively. The local network node 336 in the local network 33 also links. 322 provides external network node connections for the local network 33. = Local mobile agent node 3 32 in the system 40 makes the terminal node χ 304 at the access node 200, 200 ', 2 〇〇 ”can still be maintained and reachable when moving = Ϊ mobile agent node 332 through the preservation-terminal node X 304 head connected access node address and the mapping between the home address, JP〇 negative The packet is changed to the current phase of the terminal node X 3 0 4 and provided in the local phase signaling server 334. Segment signaling π = °, service 'to assist in data communication to the terminal node X 304. One embodiment includes different network topologies, where the interactions included are' all: one and one '. The number and type of links and the inter-node interconnections are different from the system 400 shown in FIGS. 3 to 6. Conduct a cautiously, s 304 and the second terminal node γ 304 " initially and the signalling of the above two ΓΓ procedures. The following describes the terminal node modern table obtained by the iron access node 200, including verification and sending of the representative, and the point (302, 304), (3, 2, 3, 4), (3 2 " , 1239170 V. Description of the invention

304 ") and its corresponding access point 2000, 2000, 2000 " for identification #, such as the method of address. ^ Ordered classes such as force to serve the heart ~ π Ma through The access nodes 2 0 0 get 304 before they enter the data access node 2 0. The different signalling and other operations of these two nodes. These signaling and operations =: Λ? Vnen technology and communication protocols vary Different. In the example of 0 4, in a given to the enemy to accept 9 η n rf > α take the next step. 『2 0 0 a verification module 2 〇 08 two: = 2 = fixed The secret value is used to verify the signal from the end of the initial period of the access. The message received by the other module is used, and the message received by the other module using the same secret 9 is valid, ... b paragraph letter; the second factory: ' And 04: In addition to using the same secret value, the verification method can use the same method to perform a verification action on the heart received by different modules. In the embodiment of the present invention shown in FIG. The mobile generation group 202 in the node 200 and the phase signaling server module m can use the same identification τ. The identifier can be one and the module 202, both 04. -Mountain: address. According to the present invention, the shared identifier, such as an address, sends a signal to the terminal node 302, 304 through the access node 200 (such as the message ^ 'make the existing Take the terminal node 302 within the range covered by node 20, a can know the identifier. Similarly, the terminal T points in the example system 400 can obtain the identifier information from their corresponding access nodes. In In this particular embodiment of the present invention, an access node 200 periodically broadcasts a message 402), which contains identifier information (such as an address). In the other two, a terminal node 3 2 2 and 3 0 4 Enter the cover of the access node 2000 and request the identifier by sending a signal (such as a message)

1239170 V. Description of invention (17) information (such as address). The access node 2 0 then responds to the terminal node with a signal (eg, a message) containing an identification identifier (eg, an address) of the request. An access node 2 0 0 can also use Wu's two methods in combination. It periodically broadcasts a signal (such as a message) containing 4 characters A (such as an address) and responds to the terminal node 3 0 2, 3 0. 4 specific requests. In Figure 4, 'terminal node γ 3 04' and terminal node X 3 04 have begun to establish a communication phase. Terminal node γ 3 〇 4 'is first accessed through the phased order module in the access node 2 00'. 2 0 4 '' Send a request phase signaling message 4 0 4 to the terminal node X 3 0 4. When this request message 4 0 4 is passed to the phase signaling module 2 0 4, the request message 404 confirms the terminal when the time is' Node X 304 is the target of the phase establishment request. After the phase signaling module 204 ”in the access node 2 0 0 π receives the request message 404, it will add its own identifier to the request message ( (Eg, address) 'and forward the request message 406 to the local-stage signaling server 3 344 of the terminal node X 304. The local phase signaling server 3 3 4 receives the request message 4 0 6 'adds its own identifier (such as an address) to the request message, and then forwards the request message 4 0 8 to the terminal node X 3 0 4 The currently registered position, that is, the phase signaling module 2 0 4 in the access node 2 00 received by the terminal node X 3 0 4 is receiving a request message sent by the local phase signaling server 3 3 4 After 4 0 8, the phase signaling module 2 0 4 of the access node 2 0 0 will access the status information 2 1 0 related to the mobile agent 2 0 2 to control the forwarding of the request signal. Because the status information 2 1 0 indicates that the terminal node is directly connected through the access link 3 0 8 'At this stage, the signaling server module 2 0 4 does not need to send the request message to the local end of the terminal node X 3 0 4 Mobile agent 3 3 2. Instead, it does

Page 20 1239170 V. Description of the invention (18) The request message 4 0 8 plus its own identifier (such as an address), and then the request message 41 0 is directly transmitted to the terminal node X 3 〇 4 through the access link 3 0 8 ^ After receiving the request phase signaling message 4 1 0, the terminal node X 3 04 sends a response phase signaling message 4 1 2 back to the terminal node γ 3 0 4 π ◦ This response. The hole information 4 1 2 uses the identifier list (such as the address) of the intermediate-stage signaling node contained in the received request message, and returns from the terminal node X 304 to the terminal node γ 304 ”in the reverse path. Especially this The response message 412 is transmitted from the terminal node X 3 04 to the phase signaling module 204. The phase signaling server module 204 sends the response message 414 to the local phase signaling server node 3 3 4 and then sends The response message 4 1 6 is transmitted to the access node 2 00 ′, the middle stage of the signaling server module 2 04 ″. In the access node 200 ”phase, the signaling server module 204 is then sent to the terminal node Y 304” and completes the phase signaling transaction. According to the present invention, since the signalling server modules 204, 2 04π in the access node 2 0 0, 2 0 " are in the phase signaling path, they can access the information in the phase. Let the message describe the resource requirements of the stage !! Second, to make the stage operate properly, resources such as the minimum bandwidth on the access link are required. In addition, the signalling modules 204 and 204π at this stage can also access the load level of the newly accessed node and the local policies and status information contained in the resource information 2 06, 2 0 2. 1 0 ". Based on this information, the signaling server 2 04, 2 0 4 in the access node 2 00, 2 0 " can allow or reject the phase that the end node X and the end node γ are trying to establish. . If the phase is allowed ', this phase signals the server module 2 04, 204, then reserves these resources in the access node 2 0. 2 0 0 n.

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1239170 V. Description of the invention (丨 9) '--------- In the example of the embodiment of the present invention, the terminal node X 304 is movable and can be in the communication hive 3 0 0, 3 0 at any time. 0 ,, 3 0 0 ”. Figures ^ and 6 show the example system 400 in FIG. 3 according to an example embodiment of the present invention: the mobile terminal node χ 3G4 and the second terminal node ya, the second member starts. And the signaling of a data communication phase program, the target in ## is finally switched from a first access node 200 to a second access node 200 '. Figures 5 and 6 The movement of the terminal node X 304 is indicated by double arrows 426, 4 3 0. The interaction between the signaling and nodes shown in Figures 5 and 6 is based on an event timing (tlming) described below. If the event timing changes, similar However, the same process is not required to be applied. As shown in FIG. 5, the terminal node γ 3 04 "first sends a request phase signaling through the access node 2 0" in the phase k to make the module 2 0 4 ". Message 4 2 0 to end node X 304. When this request message 420 is transmitted to the phase signaling module 204 ,,, the request message 420 confirms that the terminal node X304 is the destination of the phase establishment request. After receiving the request message 420 in the phase signaling module 2 0 in the access point 2 0 0, it will add its own identifier (such as an address) to the request message and forward the request message. Request message 422 to the local phase of the terminal node X 304. The servo is set to 3 3-4. The local phase signaling server 3 3 4 receives this request message 4 2 2 'adds its own identifier (such as an address) to the request message, and then forwards the request message 4 2 4 to the terminal node X. The current registered position of 3 04 is the phase signaling module 2 04 in the access node 2000 received by the terminal point X 3 04. Before the request message 4 2 4 reaches the stage k to make the server module 2 04, the terminal node X 3 0 4 changes its contact point to the network from a first access node 2 0 0 to 1

Page 22 1239170 V. Description of the invention (20) = access node 2 0 0 '. Note that the terminal node " 〇4 in FIG. 5 is connected to the first access node by 2 ° through the access key:!:, And the terminal node X 3〇4 is connected to the access key 30 5 in FIG. 6. To the first-access node 200 ,. = Handover operation 432 coordinated by the mobile agent module 2 () 2, 2202 in the access section lai 0 and · ,. In the switching operation 432, the status information 210 related to the 304 is provided by the first section.

Et9nn, ^ ^, that is, transfer to the second section at 20, "", .. The transferred tribute includes information such as authentication information, table tennis sharing secrets, unique identifiers allowed in the previous paragraph, and terminal node χ 3 〇 4 Take the node 2 0 0 γ ^ ^ Ρ, ^ g 0 ^ ^ # # ^ 432 ^ ^ in the storage mountain, and then move the agent in the first access node 2000, and then press The status of the point is 2 1 0, such as an identifier of the first-access point 20 0, or a segment of the signaling module 204 to access the order W in the fish access point 200 to Controls the status information 21 in the related status information of the request G, instructs the terminal section Hf / — \ takes the node 200 people h, sends the access to the node in the node 2 0 0

Let the server module 2 04 select the ν ugany ^ U request message, and immediately turn it on: another character (such as the address ^ point 2. 0 'in the phase signaling server:; ::: 4 In the example of this embodiment, in the example of the embodiment, =, as shown in Fig. 6. Note that the feeder module m does not take the self-brief-Λ at the point of 2 0 0 The signaling is sent to the second access node m, and the order identification is added to the message 434. Bai 1 again requested a servo benefit module 204 ’

1239170 V. Description of the invention (21) After receiving the request message 43 4 sent by the phase signaling server module 2 04 in the first node 200 0, the phase in the second access node 20 0 ' The signaling module 2 0 4 'will access the status information 2 1 0 related to the mobile agent 2 2' to control the forwarding of the request signal. Since the status information 2 1 0 ′ indicates that the terminal node is directly connected through the access link 3 05, the signaling server module 20 4 ′ does not need to transmit the request message to the terminal node X 3 0 4 at this stage. Local mobile agent 3 3 2. Instead, it adds its own identifier (such as an address) to the request message 4 3 4 and then sends the request message 4 3 6 directly to the terminal node X 3 04 through the access link 3 0 5. After receiving the request phase signaling message 4 36, the terminal node X 300 sends a response phase signaling message 438 back to the terminal node γ 3 04 ", as shown in FIG. 6. This response message 4 3 8 uses the identifier list (such as the address) of the intermediate-stage signaling node included in the received request message, and is returned by the terminal node X 3 0 4 to the terminal node γ 3 0 in the reverse path. 4 f ,. In particular, the response message 4 3 8 is transmitted from the end point X 3 0 4 to the phase signaling module 2 04. The phase signaling feeds the module 2 0 4 to transmit the response message 4 4 0 to the local phase signalling server point 3 3 4 and then transmits the response message 4 4 2 to the access node 2 00 ”. Signaling server module, module 204. At the stage of access node 2000, the signaling server module 204 " then sends the message 444 to the terminal node γ 304, and completes the signaling transaction at this stage. . Recall that in the example of this embodiment, the signaling server module 204 in the first access node 200 did not add its own identifier (such as an address) to the second access node. The request message 434 'of the phase 200 signaling server module 204' is therefore not in the reverse path. Although it is described between the terminal Lang point γ 3 04 ”and the terminal node χ 3 04

Page 24 1239170 V. Description of the invention (22) The phase signaling of the " " is through the phase signaling server module 2 0 4 " and 2 in the access node 200 " and 2 0 4 and only one additional stage of the signaling server node 3 3 4 in the network. In many embodiments of the present invention, the request / response message may pass through the network according to network policies and message routing. Many other phase signaling nodes. Although the resources directly required by another embodiment of the present invention are reserved in the above-mentioned phase signaling server module 20.4, 2 04 ", the terminal node 3 04, 3 04 " or the phase signaling server Device 204, 204 "can also use the resource reservation agreement message, = RSVP message to reserve resources for use in the license phase. In the detailed example of this month and the license period of a given phase, the storage Taking node 2 ο 1 generates a unique identifier and associates it with the permitted phase. This identifier is any access node during the use of the access node 200 and other end nodes χ 304 during the phase. 20,200 "are unique. In a particular embodiment, the access node ensures the uniqueness of the identifier by combining values with the terminal node χ⑽ and other values associated with the access node. Similarly, the access node 20 0 ”will also generate a unique identifier in the same stage as the terminal node ¥ 304. In section / 4, the phase request signal from the terminal node is as signal = 04 疋 Directly and explicitly transmitted to the signaling server module at this stage as another invention-in the alternative embodiment, from the terminal node υ = 4, "Find the stage signaling message 404 at the access node 2000" and Otherwise, click the ZUU ’s phase signaling module 2 04 ”to intercept the transmission to the phase signaling module% 2 η / 1 " Another stage ^ also makes the node, such as the terminal node X 3 w, a local signalling server 334 of π 2. In this case, the access node? ⑽ ^

1239170 V. Description of the invention (23) If snooping the message 404 and checking the message 404 to extract the required information to permit or deny this stage. In this approach, we call this stage signaling server module 2 04π a snooping stage signaling module. In another embodiment of the present invention, the snooping phase signaling module also adds its own identifier (such as an address) to the message before he transmits the message to the next phase signaling node. If the request phase signaling message is not directly transmitted to the phase signaling module 204 in the fetch node 200, the same steps are repeated at every two receiving ends. In this phase, the signaling module 20 4 intercepts the θ order message 40 8 and takes out the information required for the phase permission, and selects D = its own identifier (such as an address) into the message, so that Adopted in a clear manner. 7In summary, the present invention is a rare application. Please check and approve the patent in this case and use: = to bring benefits in accordance with the law. If the examiner of Jun Bureau has any right to press, The above description is only for the present invention-and ^ does not follow the production letter instructions. Ming's materials and processes are not limited to this. Therefore, the embodiments are specifically implemented, but the present invention is within the scope of the present invention, and any changes implemented are within the scope of the patents of those skilled in the art. 3 modifications are covered in this case

1239170 Brief description of the round form Figure 1 illustrates a technique for using Phase Initiation Protocol signaling in a Mob i 1 e IP environment, where a first mobile terminal node interacts with another terminal node through multiple different network elements . FIG. 2 shows an access node completed according to the present invention. FIG. 3 is a communication system network diagram completed according to an example of an embodiment of the present invention. Fig. 4 illustrates the example system of Fig. 3 signaling during a data communication phase when a program starts and conducts between a first mobile terminal node and another terminal node according to an example of an embodiment of the present invention. 5 and FIG. 6 illustrate the example system of FIG. 3 during a data communication phase initiation and transmission of signaling between a first mobile terminal node and another terminal node according to an example of an embodiment of the present invention. The mobile endpoint is switching between two access nodes.

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Claims (1)

1239170 VI. Scope of Patent Application Li Tongzhong's method is used to include multiple sections%! The plurality of nodes include the following steps of the first and second communication methods: δ, and then click 'The 帛 / t ^ γ t contains the access section of the one-stage signaling server module%: the access node And the second terminal node # *: made: Hai access node,-once in the first-and second terminal ~ Shanghai! After the:: Λ: ι segment, the data is transmitted by the first-terminal node:: Jianjian to the second terminal node. Inch, Beco News ★ The method of applying for the first item of the patent scope, including: 3% All Λ signaling server module to start the operation-phase start operation, such as the method of applying for the second item of the patent scope, operation . (2) The steps in which the μ only stays at this stage for convergence include: 7 servos to perform the start operation of the first phase [Se ^ stays at the 1st phase of the signalling feeder module using the phase start agreement signal. ni 丨 丨 a 丨 i 0 n Pr 010 c 〇1, S IP) signaling transmission phase started 4 · If the method of the scope of patent application No. 3, = the access node is a first wireless access router ; 2: the signaling server module at this stage is an Slp server; and the steps of the signaling server module at the wide operation stage include: sending a sip message from the SIp server in the wireless access router To another SIP server in the communication system. 5. The method according to item 4 of the scope of patent application, wherein the other SIp Page 28 1239170 VI. Scope of patent application Servo = is included in a second wireless access router for coupling the second terminal point to the first wireless access router. ^ 6 The method according to item 4 of the patent application scope further includes: operating the first wireless access router to interact with a first plurality of mobile nodes through a wireless communication channel, and the first terminal node is the One of a plurality of action nodes. 7. The method of claim 4 of the patent scope, including the operation. The first wireless access router interacts with a second plurality of mobile nodes. The second terminal node is one of the second plurality of mobile nodes. 8. If the method of applying for the second item of the patent scope further includes: operating the signaling server module at this stage to reserve network resources. The method of item 1 of the W patent application scope further includes: To: Envy 2 2 Let the server module transmit a SIP signal to execute a data communication step between a stage point and a second terminal node. ί t: Make the server send R s Vρ signal to reserve network resources10. For example, 4 people in the scope of the patent application, 4 people in the West · Operate the signaling servo at this stage, and more, use 3 To start the phase-terminal; the signal to start the operation of the phase; and-, the lean communication phase between the winter and the winter to the point where the received S IP f is missing φ 4 Α segment signaling feed The device retains the network; the time t M τ,, and δ of the source V are communication phases. 1239170 VI. The scope of applying for patents also includes: operating the access node and performing operations including u. If the scope of the application for patents in the second phase of the implementation phase starts at least one stage of verification and in the second stage: a. The scope can be operated by the V " person who operates the access node to b. 3. Identifier. In the first stage after doing this, a unique — 13. If the node of the patent application No. 12 is too high, the node generates a unique identifier step ^, which makes the relevant value of the operation access point and-and the The method of the access node at the end of the noon phase-terminal step, "Please refer to the method of the second item of the patent scope, including the following steps to operate the access node so that it uses a wireless link node to communicate; and A group of terminals operate the access node to communicate with a second group of terminal nodes using a wireless connection. The communication link group of & 15. If the communication method of the first patent application scope, the node further includes a mobile agent module, the method includes /, the access uses the mobile agent module in When the access point of the first-end communication system is assisted, the first station is assisted in accessing the message. … Terminal node communication 16. If the method in the scope of patent application No. 15 is applied, before the establishment of a data communication stage, send a message ^ Included to identify the signaling server module and the $ = A single common identifier included in the Lang Dian to the = 系统 人 module ________ included in the communication system, the last several pages, page 1239170 ~, the end node of the scope of patent application. 1 7. If the application symbol is an Internet 18. If the application is to operate the steps in the first access node, the signal includes 19. If the application is to operate the access to verify by the terminal section mobile agent module 2 0 If an application is used to verify the terminal and the mobile agent method. 21. If an application uses a secret that is transmitted to the first node with the first node to verify the message. 22, if applying to operate the mobile, the terminal node interacts 2 3. such as applying for a patent scope agreement, the patent scope, the terminal scope, and the signaling of the terminal node segment to wait for the point in the single common patent scope node to send a communication message to the patent scope node to issue a module The method of communication item 15, in which the item 17 of the order is transmitted to the server, and the identification attempt of item 15 is verified. Item 19, the attempted message method to build symbols. The method module uses the secret value k shared with the method of the stage and the stage of the method terminal module of item 19 of the patent scope to cause the first terminal node of the feeder module to transmit to the agent of the patent scope.模 用。 Used. The method set of item 15 of the patent scope uses Mobi le identification, and further includes: a start signal to the first-a lean communication stage, 'more includes: performing a verification action, using a segment signaling server or the verification mode therein. Group: The signalling server module uses the same authenticator & The authentication module Qiu Zihaidi-the end of the heart, Asia uses the same mobile agent module. It also contains: 1 P signaling and the first — Method of item 22 'where the move 1239170 VI. Scope of patent application: A human IP v 4 foreign agent, the method further includes: operating the mobile agent module to interact with another terminal node in the communication system using the MI IP ν 4 signaling. 2 4. The method according to item 15 of the scope of patent application, further comprising: operating the mobile agent to perform a route update action to update information used in other networks to route information to the first node through the access node. A routing tribute to a terminal. 25. The method according to item 15 of the scope of patent application, further comprising: operating the access node to use the mobile agent status information saved by the mobile agent module to control the processing of the control signal at the control stage. 2 6. The method according to item 25 of the scope of patent application, wherein the step of operating the access node to control the control signal in the control phase includes the following steps: using the state information of the mobile agent as a function, performing a control signal on the phase. Signal reorganization action. 2 7. The method according to item 15 of the scope of patent application, further comprising: operating the access node to use the mobile agent status information obtained by the mobile agent module to control the transfer of control signals to an access system in the control phase. pass. 2 8. The method according to item 15 of the scope of patent application, further comprising: operating the mobile agent module to save a set of status information corresponding to the first terminal node; and using the mobile agent status information included in the mobile agent module To perform the switching of the first terminal node from the access node to another access node in the system. Page 32 VI. Patent application light ^ 29. If the scope of patent application 篥 5 ^ is a part of a honeycomb, the method of item ′ wherein the access node is the ζ part of the honeycomb. , And the additional access node is a third. · If = Please request the 28th in the scope of the patent to use the access node, and the method has been changed. 3, to control the information in the control stage, and the information in the status information of the mobile agent 31. If the scope of the patent application is transmitted. Both the additional access node and the extra access node are the same. In this case, the control signal of the access node is transmitted to the extra section S, and the information used in the control stage to identify the extra access = In the group mobile agent status information, 32. One access node uses two; two ... In a 5-hole system, the access node contains one of the terminal nodes and the terminal # 界 用 ί connects the access node to The other section is the first terminal node of one of the points; and ", and the plurality of phase signaling modules operate with phase 3 signaling. The supporting board establishes and operates the terminal at 3 points and 3 points during the communication phase. Applying for the access node of the 32nd scope, ^ ~ = is an automatic node, and the first 34 of the access section in which the human module to support the mobile node includes: where this stage Among them, the access signaling wedge / application of the access section of the patent scope No. 33 is changed. 35. Include a phase of the start of the agreement server. 'The node is .-Π ::: Scope No. 34 Access node,…, the line is made, the interface includes ... 1 device circuit for Transmitting information in the air ~ < First terminal section 1239170 6. Application for patent scope points 3 6. As the access node of the patent application scope item 35, the interface further includes: coupling the access node to another The circuit of the node, the other node includes a phase initiation agreement server. 37. For example, the access node in the scope of patent application No. 33, wherein the signalling module in this phase includes: the first mobile node and a first A tool for generating a phase initiation protocol (SIP) signal during the phase initiation operation of two data nodes during the phase initiation operation. 38. For example, the access node in the 37th scope of the patent application The signaling module at this stage includes: A tool for generating RSVP signals to reserve network resources and change the data communication stage. 39. For example, the access node of the 37th patent application scope further includes: a set of available network resources And the signaling module at this stage includes a tool for retaining the network resources indicated by the information of the set of available network resources. 40. Access such as the scope of patent application No. 37 The node also contains the information of a set of available network resources; and the signaling module at this stage includes a function of the information in the received SIP signal, and reserves the network indicated by the information of the set of available network resources. Tools for resources 41. Such as the access node of the scope of patent application No. 37, in which the stage Page 34 1239170 VI. Scope of Patent Application The signaling module includes: a tool for performing at least one-stage verification and one-stage initiation of mid-stage license actions. 4 2. If the scope of the patent application is 41st, the first night + xr signaling module includes:, access node, where this phase is a phase of the license granted by the remote access point.丨 White 1 generates a unique identifier 4-3. For example, the access section of the patent application No. 33: Verification module, used to perform verification by * ",, 〇 ^ The signaling server module at this stage The group and the mobile agent: Click to send out an attempt to communicate with the checking operation D. Release the message of the group 44. If the scope of patent application item 43 is kept: the verification of the group should be issued by the terminal node to verify the mobile agent Group communication message; = Feeder € method. The same test is used. 5 • The access section of the patent scope No. 43 of the application is from ::: verify the signaling module or the mobile agent at this stage. Workers: "Kong Xinzhi /, Dr. Secret. The female module of the agent module of the patent application No. 37 access section s The agent module supports MobUe IP signaling. Click 'where the mobile # β ^ " If the access section of the scope of the patent application is 37, the agent module includes -MIPv4 foreign agent D.4 'where the mobile 48. Such as the access section of the scope of patent application 37. Agent mode Group includes -MIPv6 suite. ^ 'Where the shift Page 39 1239170 Patent application scope ----------- 4 9. If the patent application Weiwei town q 7 τ5 agent module contains a router, a child node, where the mobile signaling module M package I? Patent ring In the access node 1 of item 33, this stage is accompanied by the mobile agent module, and the control signal in this stage is controlled to another node in the data processing stage.仃 Click-to-send operation is in progress. Moving node: Switch the access node in the 50th range, which is indicated by 〃. State ... is a function, reformatting phase 52. If the 50th component of the scope of patent application-group status information; and, the access point, including: where the mobile agent wedge group Yukon control signal transmission i ;:use! 53 · —Communication system in the group status information, which is another tool. A first access node, including a two-coupling frame, a first-order, starting signaling module; a second access node coupled to a first-action node, including a two-stage starting signaling module Group; and # intermediate node to a second action node, which is coupled to the first point. The younger access node to the second storage 54. If the patent application scope P and the second access node are more integrated, 丨 read the first ~ "core management group" its implementation 1239170 VI, patent application scope move point The switching operation ^ uses 嚷 for related signaling. Σ The patent application scope No. ^ ^ The communication system of 4 items in the first access node switches to a bismuth at an automatic node, and includes: The agreement signal is ordered by Xi Di Liu — when accessing the node, # ^ is presented. ^ 4th-the access node forwards to the other: the second control stage starts the access node, which is included in the patent application scope 54 The communication of the item is% switched to the other in the-mobile node; the message is transferred from the-access node to the other access node. Section 2: Poor status = · If the 56th item in the scope of patent application The communication system, in which the initial signaling module included in the first access node uses the same IP address as the management module. 理 g core group total: ί :! 2 of the mobile management module J 522 · = Communication system for item 57 of the scope of patent application, in which the phase initiation command module is a phase initiation agreement server D 59. For the communication system in scope of application for patent area 58, the An access node further includes: ', νΛ, an ontology, and the protocol server and the mobile management module at this stage are both located in the ontology. ' Page 37