JP2010081605A - Base station gateway, base station relocating method and data processing method by the base station gateway - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a base station gateway, base station relocating method and data processing method with the base station gateway. <P>SOLUTION: A base station gateway includes: a storage module for storing first identifiers of at least two home base stations; an analysis module for acquiring a second identifier of a home base station that is a communication destination, by analyzing a relocation required message transmitted from a home base station, that is a communication source, through a radio access network application (RANAP); a determination module for retrieving the storage module for determining whether the second identifier is one of the first identifiers; a relocation control module for attaining relocation from the communication source home base station to the communication destination home base station through the RANAP, by switching between the communication source and communication destination home base stations, if the second identifier is one of the first identifiers; and a transfer module for transferring the relocation required message to a core network, if the second identifier is not one of the first identifiers. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a switching technique in a UMTS (Universal Mobile Telecommunication System) and LTE (Long Term Evolution) network, and more particularly, a base station gateway, a base station switching method by a base station gateway, and The present invention relates to a data processing method.

  According to statistics, nearly 70% of traffic volume comes from indoors. From the current 2G / 2.5G network operational experience, 60% of mobile users are indoors. Considering factors such as high data rates, long-distance transmissions, and the attenuation of radio signals through buildings, excellent network coverage, especially indoor coverage, is gaining attention from providers and manufacturers.

  Femtocell technology is a solution that expands the indoor cover capability of mobile communications and is applied to residential and office environments. Voice and data calls from a user's mobile phone can be transmitted to a 3G core network based on a standard interface, and can be connected to any network of conventional IP based transmission networks.

  3GPP (standardization organization for third-generation mobile communication systems) is actively promoting femtocell, that is, home base stations are actively standardizing the architecture of the UMTS mechanism and the architecture of the LTE mechanism.

  FIG. 1 shows a conventional UMTS architecture, and FIG. 2 shows an already established 3G HNB (3G Home NodeB) architecture. From FIG. 1 and FIG. 2, in the architecture of 3G HNB, 3G HNB aggregates the functions of RNC, and between 3G HNB and 3G HNB GW (3G HNB gateway) is an Iuh interface. The Iuh interface supports functions of the Iu interface, and also supports functions such as 3G HNB registration, user equipment (UE) registration to HNB, and HNB GW discovery. From the 3G HNB GW to the core network side is an Iu interface. Note that the traditional UMTS architecture has an Iur interface between RNCs and no interface between 3G HNB GWs.

  FIG. 3 shows the LTE architecture, where the network architecture is flattened and IP. An access network consists of eNodeB (evolved NodeB). The eNodeBs are connected via an X2 interface and are connected to each other using a mesh method. At the same time, the eNodeB is connected to an EPC (Evolved Packet Core) via the S1 interface. The S1 interface supports many-to-many MME, S-GW and eNodeB connections.

  The home base station is called Home NodeB (HeNB) in LTE, and is actively studied. Since a large number of HeNBs need to consider security and control when accessing the core network, it is necessary to introduce a network element such as 3G HNB GW. Generally, an X2 interface is not installed between HeNBs in consideration of cost.

  In the 3GPP standard, a concept of CSG (Closed Subscriber Group) is introduced to the home base station. In other words, the mobile user needs authority to access the home base station, and which HNB the mobile user can access is determined by the CSG where the mobile user is located. In general, there are two types of CSG placement methods. One of them is single-cell CSG (single cell CSG), and a mobile user can access only one home base station. This is a popular CSG deployment scheme, i.e., each home has one home base station that is used by registered family members or friends. Based on the registration information, the mobile user can only access multiple HNBs belonging to one or different CSGs. Another CSG arrangement method is a multi-cell CSG (multi-cell CSG) method, and a plurality of HNBs belong to one CSG. The multi-cell CSG method is generally arranged in businesses, schools, and large residential areas, and a mobile user can access a plurality of HNBs belonging to the same CSG.

  In the process of realizing the present invention, the inventor discovered that the prior art has at least the following problems.

  In the user plane, there is no direct interface between HNBs, so data may be lost during switching.

  The following problems exist in the control plane. In the prior art, the HNB GW works mainly in the TNB (Transport Network Layer) in the HNB architecture, and functions to distribute data bearers and signaling bearers, and transmits transparently to the RNL (Radio Network layer). Therefore, the switching by the HNB has a drawback that the processing time is long and the exchange of signaling with the core network is complicated.

  As mentioned above, the problem in the prior art has been described by taking UMTS as an example, but the same problem also exists in LTE.

  An object of an embodiment of the present invention is to provide a base station gateway, a base station switching method and a data processing method by the base station gateway, reduce the processing time of base station switching, and perform signaling with a core network at the time of base station switching It is to simplify.

  In order to achieve the above object, an embodiment of the present invention provides a base station gateway that controls at least two home base stations belonging to the same multi-cell closed user group.

  The base station gateway analyzes the switching request message transmitted from the home base station of the communication source with a storage module for storing the first identifiers of the at least two home base stations, and the switching request An analysis module for obtaining a second identifier of the home base station of the communication destination in the communication and the storage module are searched, and whether or not the second identifier is one of the first identifiers A determination module for determining and obtaining a determination result, and when the determination result indicates that the second identifier is one of the first identifiers, communication with the home base station of the communication source Exchange with the previous home base station to realize switching from the communication source home base station to the communication destination home base station using the RANAP protocol. A switching control module, and a transfer module for transferring the switching request message to the core network when the determination result indicates that the second identifier is not one of the first identifiers. Including.

  The home base station managed by the base station gateway is a home base station in UMTS or a home base station in an LTE network.

  The switching control module of the base station gateway receives the switching request message, and after receiving the switching request message, a first transmission / reception for transmitting a switching request command to the home base station of the communication destination Means for establishing a transport network layer transmission channel between the communication network and the communication destination home base station, and the communication destination home base station after the transport network layer transmission channel is established. And a second transmission / reception means for transmitting a switching command message to the home base station of the communication source after receiving the switching request confirmation message returned from.

  Based on the switching command message, the communication source home base station, the user equipment, and the communication destination home base station realize switching from the communication source home base station to the communication destination home base station.

  The switching control module of the base station gateway receives a switching end message transmitted from the communication destination home base station after switching, and receives the switching end message, and then receives the switching end message. And third transmitting / receiving means for transmitting the resource release command.

  Based on the resource release command, the home base station of the communication source releases the data transmission bearer of the access link control application part.

  The base station gateway includes a data buffer module for buffering data from a core network, and the switching control module receives the switching request confirmation message transmitted from the communication destination home base station, and then transmits the communication destination. And a first data transmission module for transmitting data buffered in the data buffer module to the home base station.

  The base station gateway receives data buffered in the data buffer module from the communication source home base station until the switch control module receives a switch end message transmitted from the communication destination home base station. A second data transmission module for transmitting.

  The base station gateway is buffered in the data buffer module for the source home base station until the switching control module receives the switching request confirmation message transmitted from the communication destination home base station. It further includes a third data transmission module for transmitting data.

  The base station gateway receives data buffered in the data buffer module from the communication source home base station until the switch control module receives a switch end message transmitted from the communication destination home base station. Until the communication requesting home base station receives the switching request confirmation message transmitted from the communication destination home base station. When the traffic classification of the data distributed to the mobile terminal and the third data transmission module for transmitting the data buffered in the buffer module is real-time traffic, the second data transmission module is activated to Stop the third data transmission module If not real-time traffic, further comprises the third data transmission module activates a transmission mode selection module for stopping the second data transmission module.

  When the traffic classification of the data distributed to the mobile terminal is real-time traffic, the base station gateway notifies the home base station of the communication destination to establish a buffer and buffer the received downlink data. And a notification module.

  In order to realize the above object, the embodiment of the present invention further provides a base station switching method by a base station gateway having jurisdiction over at least two home base stations belonging to the same multi-cell closed user group.

  In the above method, the base station gateway analyzes the switching request message transmitted from the communication source home base station using the RANAP protocol, and acquires the second identifier of the communication destination home base station in the switching request. Step A and the base station gateway is pre-stored and searches for first identifiers of at least two home base stations belonging to the same multi-cell closed user group, and the second identifier is Step B for determining whether or not it is one of the first identifiers and obtaining a determination result, and the determination result indicates that the second identifier is one of the first identifiers. When the base station gateway communicates with the communication source home base station and the communication destination home base station, the communication source home base station When switching to the communication destination home base station is realized by the RANAP protocol, the switching request message is transferred to the core network when the second identifier indicates that it is not one of the first identifiers. Step C.

  In step C of the method, the base station gateway receives the switching request message, and after receiving the switching request message, transmits a switching request command to the home base station of the communication destination, A station gateway establishes a transport network layer transmission channel with the destination home base station, and the base station gateway establishes a transport network layer transmission channel after the destination network Receiving a switching request confirmation message returned from the station, the base station gateway transmits a switching command message to the communication source home base station, and based on the switching command message, the communication source home base Station, user equipment, and communication destination home base station Te, to realize switching to the communication destination of the home base station from the communication source of the home base station.

  In step C of the method, the base station gateway receives a switching end message transmitted from the communication destination home base station after switching, and transmits a resource release command to the communication source home base station. Then, based on the resource release command, the communication source home base station releases the data transmission bearer of the access link control application part.

  During the execution of step C, the method further includes step D in which the base station gateway buffers data from the core network, and the base station gateway is transmitted from the destination home base station. After receiving the switching request confirmation message, the method includes a step E of transmitting buffered data to the communication destination home base station.

  After the execution of step D of the method, a data buffer is further provided to the communication source home base station until the base station gateway receives a switching end message transmitted from the communication destination home base station. Step E of sending buffered data to the module, or until the base station gateway receives the switching request confirmation message transmitted from the communication destination home base station by the switching control module. Step E ′ for transmitting data buffered in the data buffer module to the home base station.

  In the method, when the traffic classification of data from the core network is real-time traffic, the step E is executed, and when the traffic classification of data from the core network is not real-time traffic, the step E ′ is executed. .

  In the method, after the execution of the step E, the base station gateway further includes a step F for notifying the home base station of the communication destination to establish a buffer and buffer the received downlink data. .

  In order to achieve the above object, the embodiment of the present invention further provides a base station gateway that controls at least two home base stations belonging to the same multi-cell closed user group.

  The base station gateway exchanges signaling with a data buffer module for buffering data from the core network, a communication source home base station and a communication destination home base station, and the communication source home base station A signaling exchange module for switching from the communication destination home base station to the communication destination home base station, and after the signaling exchange module receives the switching request confirmation message transmitted from the communication destination home base station, And a first data transmission module for transmitting the data buffered in the data buffer module.

  The base station gateway receives data buffered in a data buffer module from the communication source home base station until the signaling exchange module receives a switch end message transmitted from the communication destination home base station. Until the communication requesting home base station receives the switching request confirmation message transmitted from the communication destination home base station. And a third data transmission module for transmitting the buffered data to the data buffer module.

  The base station gateway receives data buffered in a data buffer module from the communication source home base station until the signaling exchange module receives a switch end message transmitted from the communication destination home base station. Until the communication requesting home base station receives the switching request confirmation message transmitted from the communication destination home base station. When the traffic classification of the data distributed to the mobile terminal and the third data transmission module for transmitting the data buffered in the buffer module is real-time traffic, the second data transmission module is activated to Third data transmission module The Lumpur is stopped, if not real-time traffic, further comprises the third data transmission module activates a transmission mode selection module for stopping the second data transmission module.

  When the traffic classification of the data distributed to the mobile terminal is real-time traffic, the base station gateway notifies the home base station of the communication destination to establish a buffer and buffer the received distribution data. A notification module is further included.

  In order to achieve the above object, there is further provided a data processing method at the time of base station switching by a base station gateway having jurisdiction over at least two home base stations belonging to the same multi-cell closed user group.

  In the method, the base station gateway buffers data from the core network, and the base station gateway exchanges signaling between the communication source home base station and the communication destination home base station, and the communication source Switch from the home base station to the communication destination home base station, and after the base station gateway receives the switching request confirmation message transmitted from the communication destination home base station, to the communication destination home base station The buffered data is transmitted to the data buffer module.

  In the above method, until the base station gateway receives the switching end message transmitted from the home base station of the communication destination, the buffered data in the data buffer module is transmitted to the home base station of the communication source. Buffering in the data buffer module for the communication source home base station until the transmission step E or the base station gateway receives the switching request confirmation message transmitted from the communication destination home base station The method further includes a step E ′ of transmitting the processed data.

  In the method, when the traffic classification of data from the core network is real-time traffic, the step E is executed, and when the traffic classification of data from the core network is not real-time traffic, the step E ′ is executed. .

  After the execution of the step E of the method, the method further includes a step F in which the base station gateway notifies the communication destination home base station to establish a buffer and to buffer the received downlink data.

  The embodiment of the present invention has the following excellent effects.

  When the base station gateway according to the embodiment of the present invention performs switching between the home base stations belonging to the base station gateway and determines that the home base station belongs to the same CSG, the communication source using the RANAP protocol is used. The home base station of the communication destination communicates with the home base station of the communication destination, and switching from the home base station of the communication source to the home base station of the communication destination is realized. Compared to the prior art, since it is not necessary to exchange with the core network, the processing load of the core network is reduced, the exchange of signaling with the core network is reduced, and the switching process between home base stations belonging to the same CSG is reduced. The speed has been greatly accelerated and the switching process time has been reduced.

  According to the method and apparatus of the present invention, when switching between 3G home base stations belonging to the same CSG, the 3G home base station gateway distributes data to the communication destination 3G home base station as soon as possible, and there is no packet. Can be reduced as much as possible, and data distribution to the 3G home base station of the communication source can be stopped as late as possible to reduce the possibility of packets being lost from another aspect. The method of distributing data to the 3G home base station of the communication source by different traffic classifications can be freely selected, so that the possibility of losing packets can be reduced and the occupancy of channel resources is reduced as much as possible.

1 illustrates a conventional UMTS architecture. Fig. 3 shows an already established 3G Home NodeB (3G HNB) architecture. 1 shows an LTE architecture. The application situation of the Example of this invention is shown. FIG. 3 is a structural diagram of a 3G home base station gateway according to an embodiment of the present invention. The flow of the base station switching method by the base station gateway of the Example of this invention is shown. The flow of step 63 of the base station switching method by the base station gateway of the embodiment of the present invention is shown. The flow of the data processing method at the time of 3G home base station switching by the 3G home base station gateway of the Example of this invention is shown.

  In the base station gateway, the base station switching method by the base station gateway, and the data processing method according to the present invention, the RNL control signaling analysis processing module is installed in the gateway of the home base station. The RNL control signaling analysis processing module functions as a mobility anchor in RANAP (Radio Access Network Application Part), and the user equipment has a simple flow of signaling exchange between home base stations within the jurisdiction of the home base station gateway. Enable fast switching.

  Unlike the traditional method of improving the indoor cover, the home base station is a small radio base station installed indoors, and its access technology may be GSM, UMTS, or LTE. Good. Currently, 3GPP is examining the standardization problem of home base stations.

  Prior to detailed description of the embodiments of the present invention, in order to better understand the present invention, a multi-cell CSG situation is first described in detail.

  In general, a multi-cell CSG is arranged in a company, a school, or a large residential area, and a mobile user has authority to use a plurality of home base stations belonging to the same CSG. These home base stations are adjacent and are connected to the core network via a home base station gateway.

  One can imagine that users move frequently in businesses, schools and large residential areas. In a call state, it concerns the problem of switching between different HNBs.

  FIG. 4 shows an application situation of the embodiment of the present invention. As shown in FIG. 4, the 3G home base station gateway is connected to three 3G home base stations, 3G home base station 1, 3G home base station 2, and 3G home base station 3, respectively, and the current user equipment is 3G. Although it is in the coverage area of the home base station 2, it is moving toward the 3G home base station 1.

  The 3G home base station gateway according to the embodiment of the present invention has jurisdiction over at least two 3G home base stations and is applied to multi-cell CSG. As shown in FIG. 5, the 3G home base station gateway includes a storage module, an analysis module, a determination module, a switching control module, and a transfer module.

  The storage module stores first identifiers of the at least two 3G home base stations.

  The analysis module analyzes a switching request message (Relocation Required) transmitted from the communication source 3G home base station using the RANAP protocol, and the second identifier of the communication destination 3G home base station included in the switching request, that is, the user The identifier of the 3G home base station to which the equipment is switched is acquired.

  The determination module searches the storage module, determines whether the second identifier is one of the first identifiers, and obtains a determination result.

  When the switching control module indicates that the second identifier is one of the first identifiers according to the determination result, the switching source module and the communication destination 3G home base station By exchanging, switching of the 3G home base station is realized by the RANAP protocol.

  When the determination result indicates that the second identifier is not one of the first identifiers, the transfer module transfers the switching request message to the core network.

  Hereinafter, the situation shown in FIG. 4 will be described in detail as an example.

  As shown in FIG. 4, the user equipment is currently within the coverage area of the 3G home base station 2 and is moving in the direction of the 3G home base station 1. When the user equipment moves to a specific location within the range covered by both the 3G home base station 1 and the 3G home base station 2, the 3G home base station 2 determines that switching is necessary. At this time, the 3G home base station 2 transmits a switching request message to the 3G home base station gateway. The switching request includes the second identifier of the 3G home base station (that is, 3G home base station 1).

  When the 3G home base station gateway receives the switching request message, it analyzes and obtains the second identifier of the 3G home base station 1. Since the identifiers of the 3G home base stations 1, 2, and 3 are stored in the storage module, as a result of searching and comparing, it can be seen that the 3G home base station 1 is within the jurisdiction range. At this time, the 3G home base station gateway communicates with the 3G home base station 1 and the 3G home base station 2 to realize switching from the home base station 2 to the 3G home base station 1 using the RANAP protocol.

  At this time, the mobile terminal continued to move, and the user equipment moved to a specific location within the range covered by both 3G home base station 1 and 3G home base station X (which does not belong to the jurisdiction of 3G home base station gateway) At this time, the 3G home base station 1 determines that switching is necessary. At this time, the 3G home base station 1 transmits a switching request message to the 3G home base station gateway. The switching request includes the second identifier of the 3G home base station (that is, 3G home base station X).

  When the 3G home base station gateway receives the switching request message, it analyzes and obtains the second identifier of the 3G home base station X. Since only the identifiers of the 3G home base stations 1, 2, and 3 are stored in the storage module, as a result of searching and comparing, it can be seen that the 3G home base station X does not belong to the jurisdiction range. At this time, the switching request message is transferred to the core network, and the 3G home base station is switched according to the conventional processing flow.

  Hereinafter, the switching control module of the 3G home base station gateway according to the embodiment of the present invention will be described in detail.

  Specifically, the switching control module receives a switching request message, and after receiving the switching request message, a first transmission / reception means for transmitting a switching request command to the 3G home base station of the communication destination Channel establishing means for establishing a transport network layer transmission channel between the communication destination 3G home base station and the communication network 3G home base station after the transport network layer transmission channel is established For receiving a switching request confirmation message (Relocation Request Ack) returned from the mobile station, and after receiving the switching request confirmation message, for transmitting a switching command message (Relocation Command) to the 3G home base station of the communication source Second sending and receiving And the 3G home base station of the communication source, the user equipment, and the 3G home base station of the communication destination communicate with each other based on the switching command message, and the 3G home of the communication destination is exchanged from the 3G home base station of the communication source. Switch to base station.

  After the switching is completed, it is necessary to release resources between the 3G home base station of the communication source and the mobile equipment. Therefore, the switching control module according to the embodiment of the present invention further includes third transmission / reception means.

  The third transmission / reception means receives a switching end message (Relocation Complete) transmitted from the 3G home base station of the communication destination after switching, and receives the switching end message, and then receives the switching end message to the source 3G home base station. Iu resource release command (Iu Release Command). Based on the Iu resource release command, the 3G home base station of the communication source releases the Iu data transmission bearer.

  The following can be understood from the description of the 3G home base station gateway according to the embodiment of the present invention. In the prior art, since the 3G home base station gateway performs transparent transmission in a radio network layer (RNL), it is necessary to transfer to the core network for processing when switching base stations inside the CSG. Not only is the flow complicated, it also takes longer to switch. On the other hand, since the 3G home base station gateway according to the embodiment of the present invention can provide a mobility anchor function by using the RANAP protocol, it has the following excellent effects. That is, when switching the base station in the CSG, it is not necessary to transfer to the core network for processing, so that the processing flow is simplified and the time required for switching is also saved.

  The base station switching method by the home base station according to the embodiment of the present invention includes the following steps as shown in FIG.

  In step 61, the 3G home base station gateway analyzes the switching request message transmitted from the 3G home base station of the communication source using the RANAP protocol, and the second of the 3G home base station of the communication destination in the switching request is analyzed. The identifier, that is, the identifier of the 3G home base station to which the user equipment is switched is acquired.

  In step 62, the 3G home base station gateway is stored in advance, and the first identifier of the at least two 3G home base stations managed by the 3G home base station gateway is retrieved, and the second A determination result is obtained by determining whether the identifier is one of the first identifiers.

  In Step 63, when the determination result indicates that the second identifier is one of the first identifiers, the 3G home base station gateway and the communication source 3G home base station and the communication destination The 3G home base station is exchanged to realize switching of the 3G home base station using the RANAP protocol.

  In step 64, when the determination result indicates that the second identifier is not one of the first identifiers, the 3G home base station gateway forwards the switching request message to the core network.

  Hereinafter, step 63 will be described in detail. As shown in FIG. 7, the following steps are specifically included.

  In Step 631, when the 3G home base station gateway receives the switching request message and analyzes that the communication destination 3G home base station belongs to the jurisdiction range, the communication request 3G home base station receives a switching request command ( Relocation Request) is transmitted.

  In step 632, the 3G home base station gateway establishes a transport network layer transmission channel with the 3G home base station with which it is communicating.

  In step 633, the 3G home base station gateway receives the switching request confirmation message returned from the 3G home base station of the communication destination after the transport network layer transmission channel is established.

  In step 634, the 3G home base station gateway transmits a switching command message to the 3G home base station of the communication source. Based on the switching command message, the communication source 3G home base station, the user equipment, and the communication destination 3G home base station communicate to switch from the communication source 3G home base station to the communication destination 3G home base station. (For details, see the portion between steps 634 and 635 in FIG. 7).

  In step 635, the 3G home base station gateway receives the switching end message transmitted from the 3G home base station of the communication destination after switching.

  In step 636, the 3G home base station gateway transmits an Iu resource release command to the communication source 3G home base station.

  In step 637, based on the Iu resource release command, the communication source 3G home base station and the communication destination 3G home base station gateway are exchanged to release the Iu data transmission bearer.

  In step 638, the 3G home base station gateway receives the Iu release end command transmitted from the 3G home base station of the communication source, and ends the flow.

  Of course, in the above flow, the 3G home base station (for example, HNB, HeNB, etc.) and the 3G home base station gateway have been described as examples. However, the embodiments of the present invention can be applied to all communication systems that may appear in the future. It is understood.

  As mentioned in the background section, since there is no Iur or X2-like interface between 3G home base stations in the user plane, data cannot be transmitted over the interface between 3G home base stations. Therefore, there is a possibility that downlink data is lost during switching. Therefore, the embodiment of the present invention further provides a data processing method at the time of 3G home base station gateway and 3G home base station switching.

  The 3G home base station gateway according to the embodiment of the present invention exchanges signaling between the data buffer module for buffering data from the core network, the communication source 3G home base station, and the communication destination 3G home base station. The signaling exchange module and the signaling exchange module are buffered in the data buffer module for the communication destination 3G home base station after receiving the switching request confirmation message transmitted from the communication destination 3G home base station. And a first data transmission module for transmitting data.

  In a specific embodiment of the present invention, when the signaling exchange module receives the switching request confirmation message transmitted from the communication destination 3G home base station, between the communication destination 3G home base station and the 3G home base station gateway, Indicates that the data channel has been established, so that the data received from the core network is transmitted to the 3G home base station of the communication destination, and it is guaranteed as much as possible that the data is not lost.

  In addition, the 3G home base station gateway according to the embodiment of the present invention provides the communication 3G home base station with respect to the communication source 3G home base station until the signaling exchange module receives the switching end message transmitted from the communication destination 3G home base station. And a second data transmission module for transmitting the buffered data to the data buffer module.

  As can be seen from the above description, data transmission to the 3G home base station of the communication source is stopped after the switching is completed, so that the data integrity is further ensured when the switching fails.

  As can be seen from the above description, for data integrity, the method according to an embodiment of the present invention establishes a transport network layer transmission channel between a home base station gateway and the 3G home base station with which it is communicating. Then, data is transmitted to the 3G home base station of the communication destination. At this time, there are two types of data transmission to the 3G home base station of the communication source.

  In Method 1, when a transport channel layer transmission channel is established between the home base station gateway and the communication destination 3G home base station and a switching request confirmation message is received, the communication to the communication source 3G home base station is performed. Stop data transmission.

  In scheme 2, the home base station gateway buffers the communication source 3G home base station in the data buffer module until the signaling exchange module receives the switching end message transmitted from the communication destination 3G home base station. Send the ringed data.

  When the above method 2 is adopted, the signaling exchange module stops the downlink data transmission to the communication source HNB after receiving the switching end message transmitted from the 3G home base station of the communication destination. In order to reduce the data exchange, the following measures are taken in the embodiment of the present invention.

  When the communication source 3G home base station receives the switching command message, it transmits an L1 / L2 switching message to the mobile station, and the communication source 3G home base station stops transmission / reception of uplink data from the mobile station. Stop transmission of downlink data from the home base station gateway to the mobile station.

  There are two types of transmission methods for data transmission to the 3G home base station of the communication source, and as to which method is specifically adopted, the 3G home base station gateway of the embodiment of the present invention further includes a parameter acquisition module. , A traffic classification determination module, and a transmission mode selection module.

  The parameter acquisition module acquires QoS parameters in the data bearer distributed from the core network.

  The traffic classification determination module determines a traffic classification according to the QoS parameter and acquires a determination result.

  The transmission mode selection module adopts method 2 when the traffic classification indicates that the traffic classification is real-time traffic, and adopts method 1 otherwise. That is, one is selectively activated and the other is stopped simultaneously.

  At the same time, according to the traffic classification, it can be determined whether or not the 3G home base station of the communication destination needs to install a buffer. Therefore, when the communication destination 3G home base station receives the data distributed from the 3G home base station gateway, the traffic classification is determined according to the QoS parameter in the data bearer, the determination result is obtained, and further, according to the determination result, When the traffic classification indicates real-time traffic, a buffer is installed to buffer the received data, otherwise the buffer is not installed.

  Of course, a notification module may be installed in the base station gateway. When the traffic classification of the data distributed to the mobile terminal is real-time traffic, the notification module notifies the communication destination home base station to establish the buffer and buffer the received downlink data.

  Here, the size of the buffer may be set as necessary, or may be an experience value set in advance.

  As shown in FIG. 8, the data processing method when the 3G home base station executes the 3G home base station gateway according to the embodiment of the present invention includes the following steps.

  In step 81, the 3G home base station gateway buffers data from the core network.

  In step 82, QoS parameters in the data bearer distributed from the core network are acquired.

  In step 83, when the 3G home base station gateway receives the switching request confirmation message transmitted from the communication destination 3G home base station, the buffered data is transmitted to the communication destination 3G home base station. To do.

  In step 84, the traffic classification is determined according to the QoS parameter, and the determination result is acquired.

  In step 85, when the judgment result indicates that the traffic classification is real-time traffic, the home base station until the signaling exchange module receives a switching end message transmitted from the 3G home base station of the communication destination. The gateway transmits the data buffered in the data buffer module to the 3G home base station of the communication source.

  In step 86, when the judgment result indicates that the traffic classification is not real-time traffic, the home base station gateway sends a data buffer to the communication source 3G home base station until a switching request confirmation message is received. Send buffered data to the module.

  At the time of software switching, the user equipment is connected simultaneously with the communication source RNC and the communication destination RNC.

  However, when the mobile station performs a hard switching when switching between different 3G home base stations, that is, after disconnecting from the communication source 3G home base station, the mobile station connects to the communication destination 3G home base station. , Increasing the possibility of data loss at the mobile station. Similarly, since there is no direct interface (Iur interface in UMTS or X2 interface in LTE) between HNBs, data is transferred from the 3G home base station of the communication source to the 3G home base station of the communication destination. Instead, it needs to be distributed from the 3G home base station gateway to the communication destination 3G home base station. This also increases the likelihood that data will be lost. In the method and apparatus of the present invention, when switching between 3G home base stations belonging to the same CSG, the 3G home base station gateway distributes data to the communication destination 3G home base station as soon as possible, and packets are lost. The possibility was reduced as much as possible, and data distribution to the 3G home base station of the communication source was stopped as late as possible to reduce the possibility of packet loss from another aspect.

  Since the method of distributing data to the 3G home base station of the communication source by different traffic classifications can be freely selected, the possibility of losing packets is reduced and the occupation of channel resources is minimized. .

  Although the above has been described by taking UMTS as an example, it is understood that the method and apparatus of the embodiments of the present invention can also be applied to a mobile communication system having LTE or other similar configurations. Since the processing method is the same, redundant description is omitted here.

  The above is only a preferred implementation mode of the present invention. For general engineers in the field, slight revisions and modifications are possible on the premise that the principle of the present invention is not separated. However, it is understood that these modifications and modifications are also within the protection scope of the present invention.

Claims (24)

A base station gateway having jurisdiction over at least two home base stations belonging to the same multi-cell closed user group,
A storage module for storing first identifiers of the at least two home base stations;
An analysis module for analyzing a switching request message transmitted from a home base station of a communication source using a RANAP protocol, and obtaining a second identifier of a home base station of a communication destination in the switching request;
A determination module for searching the storage module, determining whether the second identifier is one of the first identifiers, and obtaining a determination result;
When the determination result indicates that the second identifier is one of the first identifiers, the communication source home base station and the communication destination home base station communicate with each other. A switching control module for realizing switching from the home base station to the communication destination home base station using the RANAP protocol;
A transfer module for transferring the switching request message to a core network when the determination result indicates that the second identifier is not one of the first identifiers. Base station gateway.   The base station gateway according to claim 1, wherein the home base station is a home base station in an integrated wireless communication system or an evolved home base station in a long term evolution network. The switching control module is
First transmission / reception means for transmitting a switching request command to the home base station of the communication destination after receiving the switching request message and receiving the switching request message;
Channel establishing means for establishing a transport network layer transmission channel with the communication destination home base station;
After receiving a switching request confirmation message returned from the communication destination home base station after a transport network layer transmission channel has been established, after receiving the switching request confirmation message, the communication source home base station Second transmission / reception means for transmitting a switching command message
Based on the switching command message, the communication source home base station, user equipment, and communication destination home base station communicate with each other to realize switching from the communication source home base station to the communication destination home base station. The base station gateway according to claim 1 or 2, characterized in that The switching control module is
A third switch for receiving a switching end message transmitted from the home base station of the communication destination after switching, and transmitting a resource release command to the home base station of the communication source after receiving the switching end message. Further comprising:
The base station gateway according to claim 3, wherein the home base station of the communication source releases a data transmission bearer of an access link control application part based on the resource release command. A data buffer module for buffering data from the core network;
After the switching control module receives the switching request confirmation message transmitted from the communication destination home base station, to transmit the data buffered in the data buffer module to the communication destination home base station The base station gateway according to claim 1, further comprising: a first data transmission module.   Until the switching control module receives a switching end message transmitted from the communication-destination home base station, a data buffered data is transmitted to the communication-source home base station. 6. The base station gateway according to claim 5, further comprising two data transmission modules.   Until the switching control module receives a switching request confirmation message transmitted from the home base station of the communication destination, for transmitting data buffered in the data buffer module to the home base station of the communication source 6. The base station gateway according to claim 5, further comprising a third data transmission module. Until the switching control module receives a switching end message transmitted from the communication-destination home base station, a data buffered data is transmitted to the communication-source home base station. Two data transmission modules;
Until the switching control module receives a switching request confirmation message transmitted from the home base station of the communication destination, for transmitting data buffered in the data buffer module to the home base station of the communication source A third data transmission module;
When the traffic classification of the data distributed to the mobile terminal is real-time traffic, the second data transmission module is activated to stop the third data transmission module. When the traffic classification is not real-time traffic, the third data The base station gateway according to claim 5, further comprising: a transmission mode selection module for starting a transmission module and stopping the second data transmission module.   When the traffic classification of the data distributed to the mobile terminal is real-time traffic, a notification module for notifying the home base station of the communication destination to establish a buffer and buffer the received downlink data is further provided. The base station gateway according to claim 8, comprising: A base station switching method by a base station gateway having jurisdiction over at least two home base stations belonging to the same multi-cell closed user group,
Step A in which the base station gateway analyzes the switching request message transmitted from the communication source home base station using the RANAP protocol, and acquires the second identifier of the communication destination home base station in the switching request;
The base station gateway is stored in advance and searches for first identifiers of at least two home base stations belonging to the same multi-cell closed user group, and the second identifier is the first identifier. Step B for determining whether or not one of them and obtaining a determination result; and
When the determination result indicates that the second identifier is one of the first identifiers, the base station gateway communicates with the communication source home base station and the communication destination home base station. Then, switching from the communication source home base station to the communication destination home base station is realized by the RANAP protocol, and according to the determination result, the second identifier is not one of the first identifiers. And c) forwarding the switching request message to the core network. In step C,
The base station gateway receives the switching request message, and after receiving the switching request message, transmits a switching request command to the home base station of the communication destination,
The base station gateway establishes a transport network layer transmission channel with the home base station of the communication destination;
The base station gateway receives a switching request confirmation message returned from the communication destination home base station after the transport network layer transmission channel is established,
The base station gateway transmits a switching command message to the communication source home base station, and based on the switching command message, the communication source home base station, user equipment, and a communication destination home base station communicate with each other. The method according to claim 10, wherein switching from the communication source home base station to the communication destination home base station is realized. In step C,
The base station gateway receives a switching end message transmitted from the home base station of the communication destination after switching, transmits a resource release command to the home base station of the communication source, and based on the resource release command The method of claim 11, wherein the home base station of the communication source releases a data transmission bearer of an access link control application part. During the execution of step C, the method further comprises:
The base station gateway buffering data from the core network, step D;
After the base station gateway receives the switching request confirmation message transmitted from the home base station of the communication destination, and transmits the buffered data to the home base station of the communication destination. The method according to claim 10, 11 or 12. After execution of step D,
Until the base station gateway receives the switching end message transmitted from the home base station of the communication destination, and transmits the data buffered in the data buffer module to the home base station of the communication source E Or
Until the base station gateway receives the switching request confirmation message transmitted from the home base station of the communication destination, and transmits the data buffered in the data buffer module to the home base station of the communication source E '
14. The method of claim 13, comprising:   When the traffic classification of data from the core network is real-time traffic, the step E is executed, and when the traffic classification of data from the core network is not real-time traffic, the step E ′ is executed. The method according to claim 14. After performing step E,
The method according to claim 15, further comprising a step F in which the base station gateway notifies the communication destination home base station to establish a buffer and to buffer received downlink data. A base station gateway having jurisdiction over at least two home base stations belonging to the same multi-cell closed user group,
A data buffer module for buffering data from the core network;
A signaling exchange module for exchanging signaling between the communication source home base station and the communication destination home base station, and switching from the communication source home base station to the communication destination home base station;
After the signaling exchange module receives the switching request confirmation message transmitted from the home base station of the communication destination, for transmitting the data buffered in the data buffer module to the home base station of the communication destination A base station gateway comprising: a first data transmission module. Until the signaling exchange module receives a switching end message transmitted from the communication destination home base station, the signaling exchange module transmits data buffered in the data buffer module to the communication source home base station. The data transmission module of 2 or the signaling exchange module is buffered in the data buffer module for the home base station of the communication source until receiving the switching request confirmation message transmitted from the home base station of the communication destination. The base station gateway according to claim 17, further comprising a third data transmission module for transmitting the received data. Until the signaling exchange module receives a switching end message transmitted from the communication destination home base station, the signaling exchange module transmits data buffered in the data buffer module to the communication source home base station. Two data transmission modules;
Until the signaling exchange module receives the switching request confirmation message transmitted from the home base station of the communication destination, for transmitting the data buffered in the data buffer module to the home base station of the communication source A third data transmission module;
When the traffic classification of the data distributed to the mobile terminal is real-time traffic, the second data transmission module is activated to stop the third data transmission module. When the traffic classification is not real-time traffic, the third data The base station gateway according to claim 17, further comprising: a transmission mode selection module for activating a transmission module and stopping the second data transmission module.   When the traffic classification of the data distributed to the mobile terminal is real-time traffic, it further includes a notification module for notifying the communication destination home base station to establish the buffer and buffer the received downlink data. The base station gateway according to claim 19. A data processing method at the time of base station switching by a base station gateway having jurisdiction over at least two home base stations belonging to the same multi-cell closed user group,
The base station gateway buffers data from the core network;
The base station gateway exchanges signaling with the communication source home base station and the communication destination home base station, and switches from the communication source home base station to the communication destination home base station,
After the base station gateway receives the switching request confirmation message transmitted from the communication destination home base station, the base station gateway transmits the data buffered in the data buffer module to the communication destination home base station. A method characterized by. Until the base station gateway receives the switching end message transmitted from the home base station of the communication destination, and transmits the data buffered in the data buffer module to the home base station of the communication source E Or
Until the base station gateway receives the switching request confirmation message transmitted from the home base station of the communication destination, and transmits the data buffered in the data buffer module to the home base station of the communication source E '
The method of claim 21, further comprising:   When the traffic classification of data from the core network is real-time traffic, the step E is executed, and when the traffic classification of data from the core network is not real-time traffic, the step E ′ is executed. The method of claim 22. After execution of step E,
The method according to claim 23, further comprising a step F in which the base station gateway notifies the communication destination home base station to establish a buffer and to buffer received downlink data.

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