Mobile communication method and switching node |
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IPC classes for russian patent Mobile communication method and switching node (RU 2524176):
        
 Method, device and system for access control handover of user between base stations / 2524175
Group of inventions relates to mobile communication. The method for access control handover of a user between base stations includes steps of: acquiring, by a first or a second base station, a closed subscriber group identifier (CSG ID) supported by the other base station and CSG membership information of user equipment (UE) in the first base station; and if the CSG ID acquired by one base station is the same as a CSG ID supported by the other base station, performing, by one base station, access control for the UE according to the acquired CSG membership information of the UE in the first base station and an access mode of the other base station.
 Method and system for interference reduction between base stations in fail-safe mode / 2524174
Invention relates to wireless communication engineering and particularly to a method and a system for interference reduction between base stations and improving connection quality in fail-safe mode. Disclosed is a method for interference reduction between base stations in fail-safe mode, wherein if it is established that a link is in fail-safe mode, a base station subsystem switches to fail-safe operating mode; the base station subsystem automatically changes the channel carrier frequency after switching to fail-safe mode; the base station updates and transmits an overhead message, and includes a new channel carrier frequency in the message with a list of code division multiple access (CDMA) system channels, and a mobile station calculates the occupied channel carrier frequency and occupies the new channel carrier frequency if it is established that the overhead message is updated.
 Method and apparatus for providing uplink signal-to-noise ratio (snr) estimation in wireless communication system / 2524167
Invention relates to communication systems and can be used to estimate uplink signal-to-noise ratio (SNR) in a wireless communication system. The method of estimating SNR in a wireless communication system includes receiving a control signal over a first channel in a receiver. A transmission rate indicator signal is received over a second channel in the receiver, wherein the power level of the transmission rate indicator signal is greater than that of the control signal. In the processor, the SNR of the transmission rate indicator signal is determined based on a plurality of transmission rate indicator channel symbols that are accumulated in the receiver, and the SNR of the control signal is estimated based at least in part on the product of the SNR of the second channel and the inverse of the ratio of the second channel to the control signal for a specific data transmission rate over a data communication channel.
 Network detection in wireless communication systems / 2523968
Invention relates to wireless communication. The wireless communication method includes: identifying scanning capability for a communication device, wherein the scanning capability is based on a network beacon signal transmission interval; preparing a network information message and entering passive scanning mode during the lifecycle of the scanning capability, if the communication device decides to use the scanning capability; and initiating transmission of the network information message if a beacon message corresponding to another network is received by the communication device in passive scanning mode.
 Apparatus and method for controlling sleep cycle synchronisation of sleep mode in wireless communication system / 2523955
Invention relates to synchronisation in sleep mode in a wireless communication system. A method of operating a mobile station in sleep mode state includes: if a traffic indication message and unicast data are not received during a listening window, transmitting one of a request message and a header to a base station to request a location of a next-scheduled listening window, and if a response for the one of the request message and the header is received, performing synchronisation for a next sleep cycle.
 Method and apparatus for obtaining security key in relay system / 2523954
Invention relates to communication engineering. The method of obtaining a security key in a relay system, wherein a node in a relay system obtains an initial key, in accordance with the initial key, the node obtains a root key of the security key of the radio interface between the node and another node adjoining said node, and in accordance with the root key, the node obtains a security key of the radio interface between the node and said other adjoining node. Therefore, in accordance with the initial key, each lower-level node obtains a root key of the security key of the radio interface between each lower-level node, such that UE data on an interface link Un can be secured accordingly.
 Handover method and apparatus in mobile communication system / 2523702
Method includes determining whether to handover user equipment (UE) using an X2 interface, transmitting a handover request message to a target base station (BS), the handover request message including closed subscriber group (CSG) information of the target BS, and receiving a handover request acknowledgement message from the target BS; determining whether to handover the UE using the X2 interface includes, if there is an X2 interface between the source BS and the target BS and if the target BS does not support a CSG or the target BS supports the same CSG supported by the source BS, determining that it is necessary to perform handover of the UE using the X2 interface, and obtaining the CSG information of the target BS through an X2 interface setup procedure.
 Methods and devices facilitating synchronisation of security configurations / 2523695
Terminal sends a security mode complete message to the network entity, on the receipt of which the network entity updates new security parameters. The access terminal initiates a mobility procedure while the security mode procedure is on-going, aborts the security mode procedure and reverts back to the old security parameters. The access terminal sends a mobility update message to the network entity including a dedicated status indicator configured to inform the network entity that the access terminal has reverted back to the old security parameters. In response to the mobility update message, the network entity reverts back to the old security parameters.
 Method and device in wireless network for determining uplink received power target value / 2523688
Method and device in a wireless network, comprising a first node and an adjacent second node, for determining an uplink received power target value of the second node to be used by user equipment which is to be served by the second node, wherein the downlink power capacity of the first node exceeds the downlink power capacity of the second node. The method comprises establishing the uplink received power target value of the first node, obtaining the downlink power capacity of the first node, obtaining the downlink power capacity of the second node, calculating the difference in downlink power capacity between the first node and the second node, and determining the uplink received power target value of the second node, based on the calculated difference in downlink power capacity between the nodes and the established uplink received power target value of the first node.
 Method and terminal for starting and stopping compressed mode / 2523665
Method of starting a compressed mode includes the following steps: a radio network controller (RNC) predetermines a threshold condition of starting a compressed mode and informs user equipment of the threshold condition; the threshold condition of starting the compressed mode is based on the transmission power of the user equipment; the user equipment detects whether itself meets the threshold condition of starting the compressed mode, and when the threshold condition of starting the compressed mode is met, Node B is informed; the user equipment and Node-B start the compressed mode.
 Method and device for diverting transmission in multiple access wireless communication system / 2343646
Description is given of a method and device for switching wireless terminal channels. For this, several communication channels with different physical characteristics are supported in the cell of the base station. Each wireless terminal controls several channels and evaluates several channels at the same time, such that, there can be fast switching between channels. Information on the quality of the channel is sent from each wireless terminal to the base station. The wireless terminal or base station selects the channel, based on the evaluated quality of the channel. By supporting several channels and through periodical changes in channels in different implementation alternatives, the time taken before the wireless terminal finds good or suitable channel conditions is minimised, even if the wireless terminal changes position. Several antennae are used at the base station for simultaneous support of several channels, for example, through control of the directional pattern of the antennae.
 Method of generating repeating audio signals for call return and device to this end / 2343647
During different set conditions providing source of sound for company service information as substitutive audio signal for call return, receiver can determine whether source of sound for service information for subscriber or set time interval is provided for. Present invention provides for a method and device for obtaining substitutive repeating audio signal for call return based on choice or successively in accordance with a preset condition.
 Access channel with limited reception time / 2343648
Method consists of the following stages: reception of request for channel access from user terminal. Reception of the user terminal can be one of several active user terminals. The transmission cycle duration is determined as a result of reception of a request for channel access. The arrival time of data to the cycle is determined for the user terminal. The arrival time of data to the user terminal is set, so as to designate the channel for the user terminal, starting from the time of arrival of data.
 System and method of band subchannel control with adaptive modulation and coding (amc) in communication system of multiple access with orthogonal-frequency division / 2344548
Method for assignment of band channel with adaptive modulation and coding (AMC) to subscriber stations (SS) is realised in wireless communication system, which separates full range of frequencies into multiple subcarrier bands, every of which represents set from previously specified quantity of subranges, every of which represents set of previously specified quantity of adjacent subcarriers. Method comprises the following stages: necessity in use of band channel with AMC is detected; quality of reception is measured in frequency bands; list of frequency bands with high quality of reception is formed; request is sent for assignment of band channel with AMC as well as foresaid list to base station (BS); response is received to mentioned request from BS; in compliance with response, changeover is done in SS in condition of use of band channel with AMC.
 Method and device of communication for transfer and reception of messages about services to service center or back / 2344568
Service center (SZ) for transmission of information content should not know or define number of person who initiates loading, and sole connection (TKV) of communication from communication device (TKG) to service center (SZ) does not require making another communication contact, at that information content is requested in the first communication session (SI1) with the first notice (SN1) about service from service center (SZ), and is delivered from service center (SZ) in the second communication session (SI2) with at least one notice (SN2) about service.
 System of home register of location for servicing of user of several types of networks / 2344569
System comprises subsystem of all-channel signaling processing, data base subsystem, services processing subsystem and operational maintenance subsystem, at that all subsystems are connected to communication network and accordingly realise information exchange; at that all-channel signaling processing subsystem performs function of OKC-7 processing; data base subsystem is used for storage of user data; services processing subsystem comprises one or more modules for processing of home location register services; operational maintenance subsystem comprises operational maintenance server, services acceptance terminal and close-range terminal of operational maintenance.
 Grouping of pilot-signals and control of sets in communication systems with multiple carriers / 2344570
In one version of realisation access network may assign group identifier (group ID) to every of pilot-signals associated with sector, for instance, on the basis of pilot-signals coverage areas, and transmit pilot-signals with appropriate group ID. PN shift may be used as group ID. Access terminal may group accepted pilot-signals in one or more pilot-signals group according to their group ID, and select representative pilot-signals from every group of pilot-signals for transmission of message about pilot-signal level. Access terminal may also use grouping of pilot-signals for efficient control of sets.
 Method and device for switching between common and individual channels for provisioning of broadcasting content services transmission in wireless telephone network / 2344571
Wireless communication network comprises different base stations and subscriber stations. Every base station provides services of broadcasting content transfer to subscriber stations via communication channels of one of the following types: 1) common channel used by multiple subscriber stations, 2) individual channels, every of which is separated for use by separate subscriber station. In response to one or several preset changes of condition, i.e. change of number of subscriber stations that request the program, change of transmission power level used by base station, or in case of other change of network condition, communication channel type used for provisioning of broadcasting content to one or several subscriber stations is switched over.
 Power control in external circuit for wireless communication systems / 2344572
One version of realisation comprises base station, which controls channel of speed indicator, decodes speed indicator channel with application of likelihood maximum decoder and determines availability of packet in speed indicator channel by comparison of probability to threshold, and analyses frame validity in packet-oriented channel on the basis of availability and content of packets accepted in speed indicator channel.
 Method and device for provisioning of multimedia service of broadcasting/multicasting in system of mobile communication / 2344573
Method and device are provided for provisioning of one or more communication services of point-point set type, such as multimedia service of broadcasting/multicasting (MBMS), to one or more mobile terminals, or subscriber devices (AA). When one or more mobile terminals are moved to new zone of mobile communication system controlled by other network component, after connection to service, information is transmitted between network elements by method.
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FIELD: radio engineering, communication. SUBSTANCE: invention relates to mobile communication. A new SGSN receives a location update message from a terminal having moved from the management area of an old SGSN to the management area of the new SGSN, and the new SGSN having received the location update message sends a GTPv2 signal for obtaining communication path information corresponding to GTPv2, to the old SGSN. The old SGSN, upon receiving the GTPv2 signal, if having communication path information of GTPv1 as a logical communication path established for the terminal, sends, as a response, a GTPv2 signal in which the communication path information by GTPv1 is set in an additional parameter, to the new SGSN. EFFECT: reliable transmission of link information between an old SGSN and a new SGSN. 5 cl, 11 dwg
The technical field The invention relates to a method of mobile communication and the switching node to control packet access permissions to the new node SGSN (Serving GPRS Support Node serving GPRS support node), the maintenance terminal after you move, get information about the communication channel from the previous node SGSN serving the specified terminal to move. The level of technology According to the current 3GPP specifications in the procedure update location between service areas of nodes SGSN when the terminal is in the idle state (idle mode), defined the process in which a new node SGSN receives the communication channels in a saved state from the previous node SGSN (non-patent document 1). As for the types of communication channels, there is a PDP context for users of GPRS and EPS context for users of the EPS, and the current 3GPP specifications describe them getting only through signals GTPv1 (GTP Protocol, version 1) and signals GTPv2 Protocol (GTP version 2) (non-patent documents 2 and 3), respectively. Fig(a) and 8(B) illustrate the procedure of obtaining information about the communication channel from the previous node SGSN to the new node SGSN, where Fig(A) depicts the case information on the communication channel (PDP context), which is information about the logical communication path, using the signal GTPv1 the signal quality of the second Protocol, and Fig(C) depicts the case information on the communication channel (context EPS)using GTPv2 signal as a signal of the first Protocol. As shown in Fig(A), when the terminal UE (User Equipment, a user device is in the idle state moves between nodes SGSN and sends a message about the update location to the new node SGSN, the new node SGSN receives from the previous node SGSN information about the GPRS communication channel that is defined at the previous party communication. For this new node SGSN requests information about the communication channel at the previous node SGSN, using the signal GTPv1. After receiving signal GTPv1 from the new node's previous node SGSN SGSN sets in response to the signal information about the communication channel for a communication channel GPRS installed in a given time, and returns the specified response signal. The new node SGSN receives the information about the communication channel based on the information about the communication channel specified in the specified response signal from the previous node SGSN, and on the basis of the aforementioned information about the channel connection (PDP context) sets the GPRS communication channel between the new node SGSN and the node GGSN (Gateway GPRS Support Node gateway GPRS support node). Also, as shown in Fig(B), when a new node SGSN receives the information about the communication channel EPS installed between the previous node SGSN and the device S-GW (Serving Gateway serving gateway), a new node SGSN C is prashivaet the previous node SGSN information about the communication channel, using GTPv2 signal. After taking the GTPv2 signal from the new node's previous node SGSN SGSN sets in response to the signal information about the communication channel (context EPS) for the communication channel EPS installed in a given time, and returns the specified response signal. Based on the information about the communication channel specified in the response signal, the new node SGSN establishes a new communication channel between the new EPS node SGSN and the device S-GW. At the same time to achieve compatibility between UMTS and EPS node SGSN, which connects the terminal supporting network UTRAN (W-CDMA/HSPA)network EPC supports both signal GTPv1 and GTPv2 signal. Sources list Non-patent literature Non-patent document 1: 3GPP TS23.060 (version 8.7.0). Non-patent document 2: 3GPP TS29.060 (version 8.10.0). Non-patent document 3: 3GPP TS29.274 (version 8.4.0). However, according to the current specifications in the GTPv2 signal can be set only information about the communication channel EPS and GPRS communication channel cannot be set. Also, on the contrary, in the signal GTPv1 can be set only information about the GPRS communication channel and the information about the communication channel EPS cannot be set. Therefore, when the previous node SGSN supports both protocols (GTPv1 and GTPv2), and information about the communication channel, which is the previous node SGSN, and the version of the GTP signal, received from a new node SGSN, do not match, this may lead to the case, is when you cannot get information about the communication channel. For example, in the example in Fig(A), where the previous node SGSN supports protocols GTPv1 and GTPv2 and has GPRS communication channel established with a GPRS user if the request for information on the communication channel between the new node SGSN is made using GTPv2 signal, then the previous node SGSN cannot be set in the signal-transferable information about the communication channel GPRS and therefore returns an error, causing the problem, consisting in the fact that the service user GPRS is aborted. It should be noted that as shown in Fig.9, paragraph 7.10 document 3 describes a case when the previous node SGSN that supports only Protocol GTPv1, takes GTPv2 signal from the new node SGSN, the previous node SGSN applies the rollback to the Protocol GTPv1 and performs retransmission. However, when the previous node SGSN is configured to support a Protocol GTPv1 and GTPv2 Protocol, there are the problems described above. Disclosure of inventions The present invention has been made considering the problems outlined above, and, therefore, an object of the present invention is a method of mobile communication and the switching node, providing reliable data transmission on the communication channel between the previous node SGSN and the new node SGSN, so that can be prevented a situation where the service is terminated. One aspect is the t of the present invention includes the following steps: reception in the second communication node from the terminal, moving from the realm of control of the first switching node in the management area of the second switching node, the update message location; transmitting the first communication node from the second switching node that accepted the message about the update location signal of the first Protocol to obtain information about the path of communication; notice of the second switching node error using the signal of the first Protocol to ensure rollback to the second Protocol, when between the gateway GPRS support node (node GGSN)connected to the first switching node and an external IP network, and the first switching node has a communication channel as the communication channel for the specified terminal; and changing the type of Protocol to the second Protocol from the second switching node, which was informed of an error the first switching node using a signal of the first Protocol, and re-transmission of the first switching node signal Protocol for information about the communication path using the changed Protocol type. Thus, the first switching node learns the Protocol type of the logical communication path which is set for a terminal at a given time, and thus can easily implement undo the second switching node. Technical financial p is tat inventions According to the present invention the process of obtaining reliable communication channel is between the previous node SGSN and the new node SGSN, so that it is possible to prevent the situation interruption of service. Brief description of drawings Figure 1 is a diagram showing the configuration of a mobile communication network in accordance with the first embodiment; Figure 2 is a schematic diagram of the configuration parameters for GTPv2 signal used in the first embodiment; Figure 3 is a flow diagram illustrating a procedure in which a new node SGSN receives the communication channel from the previous node SGSN in accordance with the first embodiment; Figure 4 represents a diagram of the sequence of actions corresponding to the receiving channel, illustrated in figure 3; Figure 5 is a chart illustrating the procedure for obtaining a communication channel in accordance with the second embodiment; 6(A) is a diagram of the sequence of actions corresponding to the receiving channel, illustrated in figure 5 and Fig.6(B) is a diagram of the sequence of actions that illustrates the implementation of the rollback upon receipt of the communication channel, defined in non-patent document 3; IG is a diagram sequence with partial modification of the procedures for obtaining a communication channel in accordance with the second embodiment; Fig(a) and 8(B) are a diagram illustrating the procedure for obtaining information about the communication channel to the new node SGSN from the previous node SGSN; and Fig.9 is a diagram for explaining rollback signals unsupported Protocol. The implementation of the invention Embodiments of the present invention will be specifically described below with reference to the accompanying drawings. The first option exercise Figure 1 represents a diagram illustrating the configuration of a mobile communication network, and part of the core network mainly constitutes part of the packet core. The mobile communications network includes a radio access network 2, which communicates with the mobile terminal 1 via radio waves, and core network 3, which performs the join operation and the transfer of user data. This version of implementation refers to a terminal that supports UMTS/GPRS, and terminal supporting the LTE, as the mobile terminal 1. Network 2 established radio access network UTRAN (radio access network UMTS or GERAN network (radio access network GSM/EDGE), which is capable of radio communication with the mobile terminal 1. The radio access network 2 includes a base station 11, provided in the respective cells, and the device 12 controls the base station, which is haunted manage many radio base stations 11. In the UMTS base station 11 is called the node, but may also be called "BTS" (Base Transceiver Station, base transceiver station). The device 12 controls the base station controls a set of base stations 11, and also controls the allocation and change of radio channel to the terminal 1. The device 12 controls the base station is called the "device control" (RNC: Radio Network Controller, the radio network controller) or also known as "BSC" (Base Station Controller, base station controller). The control network includes such functional elements as nodes SGSN 13A, the node GGSN 14, the gateway S-GW 15, the gateway P-GW 16 and server HSS 17. Nodes SGSN 13A-13C determine the location of terminal 1 accesses the domain of packet switching, and control the transmission of user traffic between node GGSN 14 and the radio access network 2. Also the nodes SGSN 13A-13C are routing/forwarding of IP packets using a Protocol packet and perform mobility management and session management (the control channel), which are necessary for mobile communications. Under this option the implementation of the nodes SGSN 13A and 13B contain the interface S3/S4 (GTP Protocol, version 2). Nodes SGSN with the interface S3/S4, are advanced functional elements for ensuring collaboration between UMTS and EPS. The S4 interface provided in the nodes SGSN 13A and 13B, features session management (the management communication channel EPS) with gateway S-GW 15 using GTPv2 signal, and transmission of user packets. In figure 1 the nodes SGSN 13A and 13B that supports version 2 of the Protocol GTP, are called nodes S4-SGSN. Nodes SGSN 13A and 13B also contain the interface Gn/Gp (GTP Protocol, version 1). Nodes SGSN 13A and 13B are able to connect to the node GGSN 14 packet core using signals GTPv1, and set the communication channel GPRS. Node SGSN 13C represents a functional element that does not have interface S3/S4, and having only the interface Gn/Gp (GTP Protocol, version 1). Figure 1 is a node SGSN 13C that only support version 1 of the Protocol GTP, is called the node Gn/Gp-SGSN. Node GGSN 14 is a functional element for controlling a connection between a packet core UMTS/GPRS network and an external IP network in accordance with the connection requests from the terminal 1. Node GGSN 14 forms a packet core UMTS/GPRS together with the node SGSN 13C The gateway S-GW 15 connects the user plane (U-plane) between the radio access network 2 and the network EPC and provides functions for routing and transmission of user packets. The terminal 1 transmits the IP packets over the communication channel EPS, which is installed between nodes SGSN 13A and 13B and the gateway S-GW 15 nodes SGSN 13A and 13B. Gateway P-GW 16 acts as the connection point to the external IP network and transmits the user packets to the external IP network. The EPC network is formed by the function of the regional elements, such as nodes S4-SGSN 13A and 13B, the gateway S-GW 15 and P-GW 16, and the node MME (Mobility Management Entity, node mobility management), which is not shown. Server HSS 17 is a subscriber server that manages information about the subscribers. Information about the subscribers registered in the server HSS 17, can be carried out search by user ID, and it can contain information about the communication channel. Figure 2 is a schematic diagram of the configuration parameters of the GTPv2 signal used in this embodiment. As shown in figure 2, the configuration includes a user identifier (ID) 20 type 21 of the Protocol, the name of the 22 signal operating parameters 23 and an additional parameter 24. User ID 20 represents the identification information of the user terminal 1, from which it has received the message about the update location. In the type 21 of the Protocol is set to "GTPv1 or GTPv2". In the name 22 of the signal is set to "request context" (Context, Request) when you request information about the communication channel or set the "response context" (Context Response when returning information about the communication channel. In current settings 23 you can set various parameters a, b and the like, as defined by the applicable specifications for GTPv2"specified in the type 21 of the Protocol. Operating parameters 23 are configured so h is about information 23a of the communication channel EPS can be set as a parameter GTPv2. An additional parameter 24 is configured so that it can be information about the communication channel GPRS channel (PDP context) for processing in accordance with the Protocol GTPv1, which is the Protocol along with the GTPv2 Protocol. It should be noted that since the configuration parameters of the signal GTPv2 signal shown in figure 2, has a name 22 signal = "response context", and therefore added an additional parameter 24 to specify information about the communication channel for various types of Protocol, to request information about the communication channel optional parameter 24 in the "context request" is not added. Thus, under this option the implementation of the configuration parameters GTPv2 as an additional parameter 24 provides information about the communication channel GPRS (PDP context), which is processed using different versions of the Protocol GTPv1. Thus, in the GTPv2 signal it is possible to set the information about the communication channel (the channel of communication GPRS) for different versions of the Protocol. Next will be described the actions performed in the present embodiment, performed as described above. Figure 3 illustrates the procedure in which a new node SGSN receives the communication channel from the previous node SGSN, and figure 4 represents the sequence of actions corresponding to the receiving channel, produced Luterana figure 3. The new node SGSN figure 3 is a node S4-SGSN 13A depicted in figure 1, and the previous node SGSN is another node S4-SGSN 13B shown in figure 1. In other words, the previous node SGSN (13B) and the new node SGSN (13A) are both nodes SGSN that supports the Protocol GTPv1 and GTPv2 Protocol. As shown in figure 3, the previous node SGSN (13B), which acts as a first switching node, sets the GPRS communication channel to the node GGSN 14 as a communication channel to perform in the core network packet user data of the terminal 1, which has already access to the domain of packet switching. The terminal 1 is in the idle state and does not receive any user data, and, therefore, assume the save state (preservation state) (S1), in which radioresource released, while the communication channel GPRS is supported. As shown in figure 4, in a state of preservation, when the terminal 1 moves from the area of management of the previous node SGSN 13B in the management area of the new node SGSN 13A, acting as the second switching node (S2), the terminal 1 transmits to the new node SGSN 13A to which you are moving (S3) terminal 1, the message about the update location via the network 2 wireless access. The new node SGSN 13A after the reception of a specific message about the updated location of the terminal 1 will ship the t request information about the communication channel to the previous node SGSN 13B using GTPv2 signal (S11). Here we can assume that the new node SGSN 13A consistently uses the signal GTPv2 Protocol to query information about the communication channel. When the previous node SGSN 13B receives the request information link (GTPv2), establishes a communications channel GPRS. In other words, while information about the communication channel, which is the previous node SGSN 13B is a communication channel GPRS Protocol (GTPv1, Protocol request information about the communication channel is the GTPv2 Protocol, and, therefore, the information about the communication channel and Protocol request information about the communication channel does not match each other. If the specifications of the above-mentioned non-patent document 2 apply unchanged, the information about the communication channel GPRS another Protocol cannot be set as information 23a of the communication channel EPS in the GTPv2 signal, and therefore, an error is returned. This version of the implementation is realized in such a way that in the configuration settings GTPv2 signal (figure 2) provides an additional parameter 24, which can be information about the communication channel GPRS another Protocol, and error at this point of time is not refundable. In other words, after receiving request information about the communication channel using GTPv2 signal from the new node SGSN 13A previous node SGSN 13B determines the Protocol type type 21 Protocol GTPv2 signal (S12). In case the, if the Protocol type is GTPv2 based on the above preconditions, the previous node SGSN 13B supports the GTPv2 Protocol, so the result is the determination of the continuation process (S13). The previous node SGSN 13B, decided to continue the process that identifies the user terminal for the user ID 20 GTPv2 signal, receives the information about the communication channel by means of finding information about the communication channel, which is currently set for the user terminal, the subscriber information contained in the database node SGSN 13B (S14), and determines the type of information about the communication channel (S15). In other words, determines whether the communication channel, which is currently set for the user terminal 1, the GPRS communication channel or communication channel EPS. From the above pre-conditions is determined that the communication channel is a communication channel GPRS. If the information about the communication channel set in the present time, the search is performed, is information about the communication channel GPRS another Protocol, the error is not returned, and configuration parameters of the signal GTPv2 additional parameter 24 sets the information about the communication channel GPRS. Thus, the GTPv2 signal in which information about the GPRS communication channel is defined in an extra pair is the ETP 24, sent as a response to the new node SGSN 13A (S16). The new node SGSN 13A retrieves information about the communication channel from the GTPv2 signal received from the previous node SGSN 13B. Here, as shown in figure 2, if the optional parameter 24 GTPv2 signal is set to "PDP context", on the basis of this PDP context for the terminal 1 according to the Protocol GTPv1 establishes a communications channel with GPRS node GGSN 14 (S17). Then, the terminal 1 returns "OK". As described above, this version of the implementation is designed in such a way that in the GTPv2 signal may be added to the parameter of the communication channel GPRS another Protocol, and in the case of non-communication channel established, when it passed the signal GTP, the previous node SGSN who request information on the communication channel using GTPv2 signal, and signal GTP specifies information about the communication channel contained in the additional parameter 24 GTPv2 signal. As a result, the old node SGSN in case of discrepancy of the communication channel established after signal reception, GTP, and GTP signal, even if the function doesn't work to roll back to a different Protocol is a reliable process communication channel between the previous node SGSN and the new node SGSN, and, consequently, it is possible to prevent the situation when the service is interrupted. The second option exercise This option will group the n assuming a mobile network having the same configuration as the mobile communications network depicted in figure 1. An additional parameter 24 in the configuration settings GTPv2 signal is not significant. This version of the implementation is realized in such a way that when the previous node SGSN receives the signal GTPv2 to request receipt of the communication channel on the GTPv2 Protocol determines the type of information about the communication channel established at this point in time contained in the previous node SGSN with respect to the user terminal. When the type of communication channel is a GPRS despite the fact that a request for a communication channel was adopted by the GTPv2 signal, as GTPv2 error is returned "rollback to GTPv1", which assigns the Protocol. The operation of this variant of the implementation will be described with reference to figure 5 and 6. Figure 5 is a flow diagram illustrating a procedure in which a new node SGSN receives the communication channel from the previous node SGSN, and 6(A) is a diagram of the sequence of actions corresponding to the receiving channel, illustrated in figure 5. The new node SGSN figure 5 is a node S4-SGSN 13A, shown in figure 1, and the previous node SGSN is another node S4-SGSN 13B, shown in figure 1. In other words, the previous node SGSN 13B and the new node SGSN 13A supports both Protocol GTPv1 and GTPv2 Protocol. Following the same steps, as in the above embodiment, a new node SGSN 13A after receiving the message about the update location from the terminal 1 sends a request for information about the communication channel to the previous node SGSN 13B using GTPv2 signal (S11). The new node SGSN 13A consistently uses the signal GTPv2 Protocol to query information about the communication channel. As shown in Fig.6(A), the steps are the same as those in the above-described first embodiment, from the stage when a new node SGSN 13A, accepted the message about the update location from the terminal 1 sends a request for information about the communication channel (S11), prior to the stage when the previous node SGSN 13B determines the type of information about the communication channel (S15). Further, the main image will be described the steps after step S15. The previous node SGSN 13B receives the information about the communication channel (S14), and the type definition information about the communication channel according to the above pre-conditions (S15) the type of information about the communication channel is defined as the channel of communication GPRS. The previous node SGSN 13B sends the new node SGSN 13B error "rollback to GTPv1", which instructs to perform a rollback to the Protocol GTPv1 (S21). The new node SGSN 13A after receiving GTPv2 error from the previous node SGSN 13B performs the detection of an error GTPv2 and determines the cause of the error (S22). Because the cause of the error is rolled back to GTPv1", proto is Ola applies the rollback from the GTPv2 Protocol to the Protocol GTPv1, and sends a request for information about the communication channel to the previous node SGSN 13B using signal GTPv1 (S23). As a result, the previous node SGSN 13B can specify information about the GPRS communication channel established in a given time (PDP context), the signal GTPv1 and returns the signal to the new node SGSN 13A (S24). 6(B) depicts as a comparative example, the sequence of functional activities for the implementation of the rollback defined in non-patent document 3 (Chapter 7.10 3GPP TS29.274 (version 8.4.0)). As shown in this drawing, the procedure is the same until the stage at which the previous node SGSN receives a request for information about the communication channel and determines the Protocol, but in accordance with the provisions of this specification the previous node SGSN does not support the GTPv2 Protocol and, therefore, this area is determined by the transmission error, and error is returned when using the signal GTPv1 supported the previous node SGSN. Therefore, flexible support, similar to the illustrated in this second embodiment, is difficult. Thus, this second variant implementation is configured to determine the type of information about the communication channel, which in the current time set the previous node SGSN who request information about the communication channel and returns an error GTPv2 so, to allow suitable rollback, so that the new node SGSN, accepted the GTPv2 error, can reliably translate the information about the communication channel in the Protocol that can be adopted, and the process of obtaining reliable communication channel is between the previous node SGSN and the new node SGSN, preventing the situation where service is interrupted. It should be noted that although the above-described second variant of implementation of the previous node SGSN determines the type of information about the communication channel and specifies the Protocol type of the destination rollback in the GTPv2 error, a specific method for determining the content of the error for errors GTPv2 can be changed if necessary. For example, as shown in Fig.7, although up to the step of determining the type of information about the communication channel (from S11 to 815) used the same procedure that is depicted in Fig.6(A), can also be sent to the new node SGSN GTPv2 error that does not indicate the content of the error (S31). When an error is returned GTPv2, a new node SGSN determines the rollback to the signal GTPv1 belonging to another Protocol, the Protocol to use to query information about the communication channel (S32), and reissues the request for information about the communication channel using the signal GTPv1 (S33). Thus, there is the possibility of exclusion of the process of determining the content of the error when the error GTPv2 comes from new the th node SGSN. The present invention is in no way limited to the above variants of the implementation and can be implemented in various modifications without departing from the scope of the present invention. The content of the patent application of Japan No. 2009-293016 from 24.12.2009, including description, drawings and summary, are fully incorporated herein by reference. 1. The way mobile communication, comprising the following steps: 2. The method according to claim 1, characterized in that the phase of the error notice, when the node GGSN and the first node SGSN is selected communication channel, the first node SGSN transmits to the second node SGSN GTPv2 signal containing the command to revert to GTPv1 as the cause of the error. 3. The method according to claim 1, characterized in that 4. The serving GPRS support node (SGSN), made with the possibility of transmission to another node SGSN information about the communication path relating to the terminal, moving the terminal from the management node SGSN in the management area of another node SGSN, and the node SGSN contains 5. The serving GPRS support node (SGSN), made with the possibility of obtaining information about the communication path relating to the terminal, from another node SGSN when moving the terminal from the management of another node SGSN in the area management node SGSN, and the node SGSN contains
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