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Method for transferring packet data in wireless network and base station controller

Method for transferring packet data in wireless network and base station controller
IPC classes for russian patent Method for transferring packet data in wireless network and base station controller (RU 2490810):
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Multiplexer has system block, wherein four-channeled telegraph one-polar and two-polar modules are positioned, as well as four-channeled standard-joint C2 module, bi-impulse one-channeled and two-channeled modules, one-channeled telephone module, m modules of four-channeled asynchronous adapter, group control electronic board, and also block for adjustment and control, and combination board.

FIELD: radio engineering, communication.

SUBSTANCE: technical key points of the present invention are as follows: before the base station controller receives a message sent by the serving GPRS support node (SGSN) to request the confirmation of a cell update of a mobile station (MS), the packet data of the first cell, initially meant to be sent to the MS, are transferred to a temporary block flow (TBF) between the MS and a second cell, and then sent to the base station (BTS) of the second cell via the TBF and then sent to the MS by the base station of the second cell.

EFFECT: effectively reducing packet data loss when a station moves from a first cell to a second cell.

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The technical FIELD

The present invention relates to the technology of packet data and, in particular, to a method of transmitting packet data in a wireless network to the base station controller of the network.

The LEVEL of TECHNOLOGY

The packet radio service (GPRS, General Packet Radio Service) is a data service in a global system for mobile communications (GSM, Global System for Mobile Communications). Usually, the wireless network packet data includes one or more subnets, each of which contains a certain number of nodes in the provision of services (SN service node), and in this case, these nodes SN are referred to as serving GPRS support nodes (SGSN, Serving GPRS Support Node). Nodes SGSN can provide packet data for the mobile station (MS, mobile station) using a base station controller (BSC, base station controller). The main functions of the nodes SGSN includes routing and packet forwarding, authentication and encryption, session management, mobility management, management of logical communication lines, as well as the formation and conclusion of phone bills.

Usually one controller BSC can control many hundreds of and, respectively, the set of base transceiver stations (BTS, base transceiver station) and is the connection point between the BTS and the mobile switching center communications (MSC, mobile switching centre), and also provides an interface for the exchange of information between the BTS and the center MSC. The main functions of the controller BSC include: control channel, the calling, the establishment and disconnection of lines of communication and management handover station MS in the local SOTE control.

Station MS is a user equipment, including devices that are placed on the Board, a laptop or portable device. BTS is a node in a radio access network (RAN, radio access network) in the GSM system and is responsible for the reception and transmission of mobile communication signals in one cell.

Within the prior art, when the moving station MS from the first cell to the second cell, after receiving the message, the FLUSH-LL controller BSC selectively forwards the packet data to the first cell, originally rendered in station MS, using a temporary flow blocks (TBF temporary block flow) station MS and the second cell. If the station MS has just moved into the second cell, requires a certain period of time for normal communication with station MS in the second cell, while the controller BSC receives a message FLUSH-LL, in many cases, may be exempted flow TBF station MS and the first cell, which leads to loss of packet data, and strongly influences the exchange of data related to station MS.

The INVENTION

Cos the main purpose of the present invention is the provision of a method of forwarding a packet data in a wireless network and the controller of the base station of this network to effectively reduce loss of packet data during a move station MS from the first cell to the second cell and to guarantee the normal communication with the station MS.

According to one aspect of the present invention proposes a method of forwarding a packet data in a wireless network, including:

the movement of a mobile station from the first cell to the second cell;

local search controller base station temporary stream blocks the mobile station and the first cell in accordance with the identifier temporary logical communication line (TLLI temporary logical link identifier)that is pre-allocated to the mobile station by the serving support node of the packet radio service General purpose, and receiving packet data to the first cell, originally to be transmitted to the mobile station using the temporary stream blocks the mobile station and the first cell; local search temporary stream blocks the mobile station and the second cell in accordance with the identifier temporary logical lines of communication and the transfer of packet data to a temporary stream of blocks of the mobile station and the second cell; transmitting packet data in a base transceiver station of the second cell by using the temporary stream blocks the mobile station and the second cell before receiving the messages sent by the serving support node of the packet radio service General purpose for confirmation updated the I cell in the mobile station;

the transfer base transceiver station of the second cell packet data in a mobile station.

Preferably, the method also includes:

after the packet data controller of the base station, receiving a message for prompting the honeycomb update in the mobile station, and the said message contains the identifier temporary logical link identifier of the virtual connection Protocol packet radio service General purpose subsystem base station (BVCI, base station subsystem GPRS protocol virtual connection identifier) for the mobile station and the first cell, the identifier of the virtual connection Protocol packet radio service General purpose subsystem base station to the mobile station and the second cell; in accordance with the message for confirmation update cell in the mobile station, transmitting a response confirmation message to the service node support packet radio service General purpose, and a response confirmation message contains the identifier of the virtual connection Protocol packet radio service General purpose subsystem base station to the mobile station and the second cell, as well as information about the volume of packet data.

Preferably, the method also includes, after moving mobile station of the PE the howling cell to the second cell,

transmitting mobile station base transceiver station of the second cell request message allocation of the radio channel and the transmission base transceiver station of the second cell of the above mentioned request message to the base station controller;

the selection controller base station to the new radio channel for the mobile station to establish a temporary stream of blocks of the mobile station and the second cell and the transmission in the base transceiver station of the second cell response message allocation of the radio channel.

the transfer base transceiver station of the second cell response message to the mobile station and transmitting mobile station base transceiver station of the second cell of the resource request message containing the identifier temporary logical link, in accordance with the response message, and transmitting the base transceiver station of the second cell of the resource request message to the base station controller.

Preferably, the method also includes, after sending the mobile station a request message resource and before reception by the base station controller messages transmitted by the serving support node of the packet radio service General purpose for confirmation update cell in the mobile station,

the transfer of the mobile station unit of data is the control Protocol logical link in a serving support node of the packet radio service General purpose these Protocol data unit control logic communication line contains the identifier temporary logical link identifier of the second cell, which is located in a mobile station, and the controller ID of the base station managing the second cell.

Preferably, the packet data of the first cell, originally rendered in the mobile station include packet data of the first cell, originally stored in the controller of the base station and be transferred to the mobile station and the packet data transmitted by the serving support node of the packet radio service General purpose in the first cell before initiating forwarding of the packet data.

In another aspect, the present invention proposes a base station controller that contains the module packet capture module forwarding the packet data and the module packet data, while

the collection module packet data is used for local search temporary stream blocks the mobile station and the first cell in accordance with the identifier temporary logical link, pre-allocated for the mobile station by the serving support node of the packet radio service General purpose, after movement of the mobile station from the first cell to the second cell, and to collect the package, the s data of the first cell, originally to be transmitted to the mobile station using the temporary stream blocks the mobile station and the first cell;

module forwarding the packet of data is used for local search temporary stream blocks the mobile station and the second cell in accordance with the identifier temporary logical lines of communication and to transfer the packet data to a temporary stream of blocks of the mobile station and the second cell;

the module packet data used for transmission in the mobile station packet data via the base transceiver station of the second cell by using the temporary stream blocks the mobile station and the second cell before receiving the messages sent by the serving support node of the packet radio service General purpose for confirmation update cell in the mobile station.

Preferably, the base station controller also contains the first module receiving the message and the first transmission module messages and

the first module receiving messages is used to receive messages for confirmation update cell in the mobile station after the transmission of packet data transmission module packet data, and the message for confirmation update cell in the mobile station contains the identifier temporary logical link, identifikatsionnogo connection Protocol packet radio service General purpose subsystem base station to the mobile station and the first cell, as well as the identity of the virtual connection Protocol packet radio service General purpose subsystem base station to the mobile station and the second cell;

the first module transfer message is used to transmit the response message of confirmation in the service support node of the packet radio service General purpose upon receipt of a message for prompting the honeycomb update in the mobile station by the first module receiving messages, these response confirmation message contains the identifier of the virtual connection Protocol packet radio service General purpose subsystem base station to the mobile station and the second cell, as well as information about the volume of packet data.

Preferably, the base station controller also includes a second module receiving messages, processing module, the second module send the message, and the third module receiving messages, while

the second module receiving the message is used to receive a request message allocation channel transmitted by the mobile station via the base transceiver station of the second cell;

the processing module is used for allocating a new radio channel to the mobile station in accordance with the request message and to establish a temporary stream blocks the mobile station of the second cell;

the second module transfer message is used to send the reply message allocating radio channels in a mobile station via a base transceiver station of the second cell after the establishment of the module processing time stream blocks to the mobile station and the second cell;

the third module receiving messages is used for receiving the resource request message transmitted by the mobile station via the base transceiver station of the second cell, after transmission of the response message by the second module to send the message, these resource request message contains the identifier temporary logical link.

In the above technical scheme before receiving the message for confirmation update cell in the mobile station controller BSC transports the packet data of the first cell, originally to be transmitted to the mobile station, the flow TBF the mobile station and the second cell, and then use thread TBF the mobile station and the second cell data is transmitted to the BTS station of the second cell, and, finally, the BTS of the second cell transmits data to the mobile station, allowing effectively reduce the loss of packet data during the move, the mobile station from the first cell to the second cell, and ensures the normal data exchange with the mobile station, and also reduces efficient retransmission packet data after the honeycomb update.

BRIEF DESCRIPTION of DRAWINGS

Figure 1 shows a scenario variant implementation of the present invention.

Figure 2 shows a method of transmitting packet data in a wireless network in accordance with the first embodiment of the present invention.

Figure 3 shows the structure of a controller of a base station in accordance with the second embodiment of the present invention.

Figure 4 shows the effect of using known technical schemes for packet data.

Figure 5 shows the effect of using the technical scheme in accordance with the embodiment of the present invention for transmitting packet data.

PREFERRED embodiments of the PRESENT INVENTION

For a clearer understanding of the purpose, technical scheme and advantages of the present invention variations in its implementation are further described in more detail in conjunction with the attached drawings.

It should be noted that the following describes only some, not all embodiments of the present invention. All other embodiments of the invention, implemented by the specialist based on the above scenarios without creative work, are within the claims.

Figure 1 shows a scenario variant implementation of the present invention, and Fig shows the way forward packet data in a wireless network in accordance with the first embodiment of the present invention. Figure 1 and figure 2 it is shown that the controller BSC controls station BTS1 of the first cell and the station BTS2 of the second cell, when this station BTS1 and BTS2 are responsible for the reception and transmission of signals in the implementation of mobile communication between the network side and station MS, and the controller BSC is connected to the node SGSN. Controller BSC pre-sets BSSGP virtual connection (BVC, BSSGP virtual connections between station MS and the first hundredth, and between station MS and the second one hundredth and allocates identifiers BSSGP virtual connections (BVCI, BSSGP virtual connection identifier) for the first and second cells.

The method in accordance with the first embodiment of the invention includes the following steps:

S202: the Moving station MS from the first cell to the second cell and the implementation of a controller BSC local search thread TBF station MS and the first cell in accordance with the identifier TLLI temporary logical link, the pre-selected station MS node SGSN, and collect packet data for the first cell, originally to be transmitted to station MS using flow TBF station MS and the first cell.

When this packet data to the first cell, originally rendered in station MS include packet data of the first cell, originally stored in the controller BSC and transferable in station MS, and packet data transmitted by the node SGSN in the first cell before initiating forwarding of the packet is the data.

S204: the Implementation of a controller BSC local search thread TBF station MS and the second cell in accordance with the identifier TLLI and transferring the packet data to the stream TBF station MS and the second cell. The way forward packet data known from the prior art and are not further discussed.

S206: the Transmission controller BSC packet data in the station BTS2 using flow TBF station MS and the second cell, and forwarding station BTS2 packet data at station MS before receiving controller BSC messages transmitted by the node SGSN to request confirmation of the update cell station MS.

The packet data transfer completes.

The method in accordance with this embodiment of the present invention also includes:

after the packet data controller BSC, the transmission node SGSN message for confirmation update cell station MS, the message for confirmation update cell station MS contains the identifier TLLI, ID BVCI station MS and the first cell ID BVCI station MS and the second cell; in accordance with the message for confirmation update cell station MS transmission controller BSC return a confirmation message to the node SGSN, and a response confirmation message contains the ID of the BVCI station MS and the second cell, as well as information about the volume of the batch is given the s.

It should be noted that the message for confirmation of the update data in station MS is a message FLUSH-LL, respectively, return the confirmation message is a message FLUSH-LL-ACK; message for confirmation of the update data in station MS and a response confirmation message can be a message to other types, in this description these messages are given only as examples, and the present invention is not limited to these types of messages.

The method also includes, after moving station MS from the first cell to the second cell, the transfer station MS in the station BTS2 request message allocating a radio channel and transmitting station BTS2 request message to the controller BSC, the allocation controller BSC of the new radio station MS, the establishment of this controller flow TBF station MS and the second cell, and transmitting the response message of allocating radio station BTS2; forwarding station BTS2 response message to the station MS and the transfer station MS in the station BTS2 of the resource request message containing the identifier TLLI, in accordance with the accepted response and the confirmation message, and the sending station BTS2 in controller BSC of the resource request message.

After the transfer station MS request message resource and before the reception controller BSC transmitted by the node SGSN messages on the I asks you update cell station MS, the method in accordance with this embodiment of the present invention includes: a transfer station MS to the node SGSN Protocol data unit control logic communication line (LLC PDU logical link control protocol data unit), the block LLC PDU contains the identifier TLLI, the identifier of the second cell, which is a station MS and the ID controller BSC, managing the second cell.

The identifier of the second cell, which is a station MS, indicate through a combination of area code location (LAC, location area code and area code routing (RAC routing area code) or by other means. The ID controller BSC can be specified using the MAC address or other means. A means of specifying the cell ID and the ID controller BSC is provided only as an example and do not limit the present invention.

Figure 3 shows the structure of a controller of a base station in accordance with the second embodiment of the present invention. As shown in figure 1 and figure 3, the controller 300 of the base station in accordance with the second embodiment of the present invention contains:

module 301 collecting batch data used for local search thread TBF station MS and the first cell in accordance with the identifier TLLI, pre-allocated for station MS node SGSN, the donkey move station MS from the first cell to the second cell, and to collect packet data for the first cell, originally to be transmitted to station MS using flow TBF station MS and the first cell;

module 302 forwarding packet data used for local search TBF station MS and the second cell in accordance with the identifier TLLI and to transfer the packet data to the stream TBF station MS and the second cell;

module 303 packet data used for transmission in a station MS packet data through the station BTS2 using flow TBF station MS and the second cell before receiving the messages sent by the node SGSN to request confirmation of the update cell station MS.

Controller BSC 300 according to the second variant of implementation of the present invention also contains:

the first module 304 receiving messages, used to receive messages for confirmation update cell station MS after the transmission of packet data module 303 packet data, and the message for confirmation update cell station MS contains the identifier TLLI, ID BVCI station MS and the first cell and the ID of BVCI station MS and the second cell;

the first module 305 send the message used to send the reply confirmation message to the node SGSN after receiving the message for confirmation update cell station MS first module 304 receipt of a message, when the response is a confirmation message contains the ID of the BVCI station MS and the second cell, as well as information about the volume of packet data.

Controller BSC 300 according to the second variant of implementation of the present invention also contains:

the second module 306 receiving messages used for receiving a request message allocation channel transmitted by station MS through the station BTS2;

module 307 of the processing used to allocate a new channel for station MS in accordance with the request message and to establish the flow TBF station MS and the second cell;

the second module 308 send the message used to transfer station MS through the station BTS2 response message allocation of the radio channel after establishing module 307 flow TBF station MS and the second cell;

the third module 309 receiving messages used for receiving a request message resources sent by station MS through the station BTS2, after transmitting the response message to the second module 308 send the message, and the resource request message contains the identifier TLLI.

In accordance with the second embodiment of the present invention to packet data first cell, originally rendered in station MS include packet data of the first cell, originally stored in the controller BSC 300 and transferable in station MS, and packet data transmitted by the node SGSN in the first cell before initiating forwarding akutnych data.

The processes of information exchange and interaction between modules described above device may refer to the method in accordance with the embodiment of the present invention, because they are based on the same concept as this way, so these processes are not described again.

Further, as an example to illustrate the advantages of the technical schemes of the present invention shows the results obtained using the tool DuMeter designed to measure the characteristics of the packet data.

Figure 4 shows the effect of using known technical schemes for packet data. Pause, shown in figure 4 and figure 5, indicate that you cannot resolve intermittent interruption during transfer station MS from the first cell to the second cell. From a comparison of the sizes of the intervals shown in figure 4 and figure 5, it is seen that the loss of packet data due to the disadvantages of the known technical schemes, while the technical scheme according to the present invention can effectively reduce the loss of packet data generated during handling station MS from the first cell to the second cell, and ensure the normal communication station MS, as well as reduce the rate of repeated packet data after the honeycomb update.

<> From the above description, the specialist it is obvious that the present invention can be implemented using software and related hardware platform, or only using hardware, although the first option in most cases is the most preferred. In this regard, some or all of the improvements implemented by using the technical scheme in accordance with the present invention, may be made in the form of software products, computer software may be stored on data media (such as ROM/RAM, magnetic or optical disk)containing several commands used to run on a computer device (such as a personal computer, server, or network device) method corresponding to some options each option or implementation of the present invention.

The above description relates only to the specific modalities for the implementation of the present invention and does not limit the invention. All modifications or changes within the entity of the present invention are within the scope of the claims.

1. The way forward packet data in a wireless network, including:
the movement of a mobile station from the first cell to the second cell;
local search controller base camp of the AI time stream of blocks of the mobile station and the first cell in accordance with the identifier temporary logical link, pre-allocated to the mobile station by the serving support node of the packet radio service General purpose, and receiving packet data to the first cell, originally to be transmitted to the mobile station using the temporary stream blocks the mobile station and the first cell; local search temporary stream blocks the mobile station and the second cell in accordance with the identifier temporary logical lines of communication and the transfer of packet data to a temporary stream of blocks of the mobile station and the second cell; and transmitting packet data in a base transceiver station of the second cell by using the temporary stream blocks the mobile station and the second cell before receiving the messages sent by the serving support node of the packet radio service General purpose for confirmation update cell in the mobile station;
the transfer base transceiver station of the second cell packet data in a mobile station.

2. The method of claim 1, also including:
after the transmission of packet data, the base station controller receiving a message for prompting the honeycomb update in the mobile station, and the said message contains the identifier temporary logical link identifier of the virtual connection Protocol packet radio service General purpose subsystem the base station to the mobile station and the first cell, the identifier of the virtual connection Protocol packet radio service General purpose subsystem base station to the mobile station and the second cell; in accordance with the message for confirmation update cell in the mobile station transmitting the response message of confirmation in the service support node of the packet radio service General purpose, and a response confirmation message contains the identifier of the virtual connection Protocol packet radio service General purpose subsystem base station to the mobile station and the second cell, as well as information about the volume of packet data.

3. The method according to claim 1 or 2, comprising, after moving the mobile station from the first cell to the second cell
transmitting mobile station base transceiver station of the second cell request message allocation of the radio channel and the transmission base transceiver station of the second cell of the above mentioned request message to the base station controller;
the selection controller base station to the new radio channel for the mobile station to establish a temporary stream of blocks of the mobile station and the second cell and the transmission in the base transceiver station of the second cell response message allocation of the radio channel.
the transfer base transceiver station of the second cell of the Vatan message to the mobile station and transmitting mobile station base transceiver station of the second cell request message resources contains the identifier temporary logical link, in accordance with the response message, and transmitting the base transceiver station of the second cell of the resource request message to the base station controller.

4. The method according to claim 3, comprising, after the transmitting mobile station a request message resource and before reception by the base station controller messages transmitted by the serving support node of the packet radio service General purpose for confirmation update cell in the mobile station,
the transmission of mobile station data block control Protocol logical link in a serving support node of the packet radio service General purpose, these Protocol data unit control logic communication line contains the identifier temporary logical link identifier of the second cell, which is located in a mobile station, and the controller ID of the base station managing the second cell.

5. The method according to claim 1 or 2, in which the packet data of the first cell, originally rendered in the mobile station include packet data of the first cell, originally stored in the controller of the base station and be transferred to the mobile station and the packet data transmitted by the serving support node pluripotency radio General purpose in the first cell before initiating forwarding of the packet data.

6. The base station controller that contains the module packet capture module forwarding the packet data and the module packet data, while
the collection module packet data is used for local search temporary stream blocks the mobile station and the first cell in accordance with the identifier temporary logical link, pre-allocated for the mobile station by the serving support node of the packet radio service General purpose, after movement of the mobile station from the first cell to the second cell and to collect packet data for the first cell, originally to be transmitted to the mobile station using the temporary stream blocks the mobile station and the first cell;
module forwarding the packet of data is used for local search temporary stream blocks the mobile station and the second cell in accordance with the identifier temporary logical lines of communication and to transfer the packet data to a temporary stream of blocks of the mobile station and the second cell;
the module packet data used for transmission in the mobile station packet data via the base transceiver station of the second cell by using the temporary stream blocks the mobile station and the second cell before receiving the messages sent by the serving support node of a packet radio service of the future destination for confirmation update cell in the mobile station.

7. The base station controller according to claim 6, containing the first module receiving the message and the first transmission module messages and
the first module receiving messages is used to receive messages for confirmation update cell in the mobile station after the transmission of packet data transmission module packet data, and the message for confirmation update cell in the mobile station contains the identifier temporary logical link identifier of the virtual connection Protocol packet radio service General purpose subsystem base station to the mobile station and the first cell and the identifier of the virtual connection Protocol packet radio service General purpose subsystem base station to the mobile station and the second cell;
the first module transfer message is used to transmit the response message of confirmation in the service support node of the packet radio service General purpose upon receipt of a message for prompting the honeycomb update in the mobile station by the first module receiving messages, these response confirmation message contains the identifier of the virtual connection Protocol packet radio service General purpose subsystem base station to the mobile station and vtoro the cell, as well as information about the volume of packet data.

8. The base station controller according to claim 6 or 7, containing the second module receiving messages, processing module, the second module send the message, and the third module receiving messages, while
the second module receiving the message is used to receive a request message allocation channel transmitted by the mobile station via the base transceiver station of the second cell;
the processing module is used for allocating a new radio channel to the mobile station in accordance with the request message and to establish a temporary stream of blocks of the mobile station and the second cell;
the second module transfer message is used to send the reply message allocating radio channels in a mobile station via a base transceiver station of the second cell after the establishment of the module processing time stream blocks to the mobile station and the second cell;
the third module receiving messages is used for receiving the resource request message transmitted by the mobile station via the base transceiver station of the second cell, after transmission of the response message by the second module to send the message, these resource request message contains the identifier temporary logical link.

9. The base station controller according to claim 6 or 7, in which the package is haunted data of the first cell, originally transferable in the mobile station include packet data of the first cell, originally stored in the controller of the base station and be transferred to the mobile station and the packet data transmitted by the serving support node of the packet radio service General purpose in the first cell before initiating forwarding of the packet data.

 

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