WO2015085741A1 - Procédé de commutation, station de base source, station de base cible, système et support d'informations - Google Patents

Procédé de commutation, station de base source, station de base cible, système et support d'informations Download PDF

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Publication number
WO2015085741A1
WO2015085741A1 PCT/CN2014/080111 CN2014080111W WO2015085741A1 WO 2015085741 A1 WO2015085741 A1 WO 2015085741A1 CN 2014080111 W CN2014080111 W CN 2014080111W WO 2015085741 A1 WO2015085741 A1 WO 2015085741A1
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WIPO (PCT)
Prior art keywords
base station
flow identifier
target base
rohc
user terminal
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PCT/CN2014/080111
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English (en)
Chinese (zh)
Inventor
董建军
贺保国
马德宝
李龙忠
李东建
Original Assignee
中兴通讯股份有限公司
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Application filed by 中兴通讯股份有限公司 filed Critical 中兴通讯股份有限公司
Priority to JP2016557171A priority Critical patent/JP6422504B2/ja
Publication of WO2015085741A1 publication Critical patent/WO2015085741A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0011—Control or signalling for completing the hand-off for data sessions of end-to-end connection
    • H04W36/0033—Control or signalling for completing the hand-off for data sessions of end-to-end connection with transfer of context information

Definitions

  • the present invention relates to a handover technology in the field of wireless communication, and in particular, to a handover method based on a Robust Header Compression (ROHC) protocol, a source base station, a target base station, a system, and a storage medium.
  • ROHC Robust Header Compression
  • ROHC is a universal compression technology based on Internet Protocol (IP).
  • IP Internet Protocol
  • ROHC can be applied to any standard of 3G (The Third Generation) mobile communication. It can also be applied to Long Term Evolution (LTE, Long). In terms of technology such as Term Evolution, it is possible to compress an excessive number of 3 ⁇ 4 bytes to about 1 byte under extremely poor channel conditions, which greatly improves the bandwidth utilization.
  • the ROHC can operate between the base station and the user terminal, and the header is compressed and decompressed by a compressor and a decompressor, respectively.
  • the compressor and decompressor need to maintain a set of context information to maintain efficient compression efficiency.
  • the context information is obtained by learning the compressor and decompressor. If the context information is lost, ROHC must Roll back to the original state, re-learn and maintain new context information, but ROHC compression efficiency is extremely low during the learning process. Therefore, when the user terminal moves from the coverage area of one base station A to the coverage area of another base station B, the user terminal switches from the base station A to the base station B. Since the base station B does not have context information corresponding to the user terminal, Context information can be obtained by re-learning through ROHC, which will result in the user terminal switching between base stations.
  • the embodiments of the present invention provide a handover method based on a robust header compression protocol, a source base station, a target base station, a system, and a storage medium, so that the user terminal can maintain high compression efficiency after switching between base stations.
  • an embodiment of the present invention provides a handover method based on a robust header compression ROHC protocol, where the method includes:
  • the first ROHC context information is used for ROHC context information used by the source base station to interact with the user terminal;
  • the first ROHC context information includes:
  • a first service flow identifier used by the source base station to interact with a user terminal, a first data flow identifier, a first ROHC operation mode, a state of the first compression end and the decompression end, a first static context, and a first dynamic Context
  • the second ROHC context information includes: a second service flow identifier, a second data flow identifier, a second ROHC operation mode, a second compression end, and a decompression end state used when the target base station interacts with the user terminal. And a second static context and the target base station and the second dynamic context.
  • the target base station learns the first ROHC context information, and obtains the second ROHC context information, including:
  • the second ROHC operation mode used by the target base station to interact with the user terminal is selected as the first ROHC operation mode
  • the state of the second compression end and the decompression end used by the target base station to interact with the user terminal is selected as the state of the first compression end and the decompression end;
  • the target base station interacts with the user terminal by using the first static context as itself a second static context, the second static context is used to distinguish the service flow; the target base station uses the first dynamic context as a second dynamic context used by the user to interact with the user terminal.
  • the second dynamic context is used to perform compression and decompression processing;
  • the target base station sets a second service flow identifier used by the target base station to interact with the user terminal according to the first service flow identifier and the state of the target base station;
  • the target base station sets a second data stream identifier used by the target base station to interact with the user terminal according to the first data stream identifier and the state of the target base station.
  • the first service flow identifier of the target base station and the self-state of the target base station, and the second service flow identifier used by the target base station to interact with the user terminal including:
  • the target base station Determining, by the target base station, a third service flow identifier from the first service flow identifier according to the state of the target base station, where the third service flow identifier is a first service flow identifier supported by the target base station ;
  • the target base station acquires a fourth service flow identifier, where the fourth service flow identifier is a service flow identifier that is supported by the target base station and is not included in the first service flow identifier.
  • the target base station uses the third service flow identifier and the fourth service flow identifier together as a second service flow identifier used by the target base station to interact with the user terminal;
  • the target base station sets the second service flow identifier used by the target base station to interact with the user terminal according to the first data flow identifier and the self-state of the target base station, including:
  • the target base station acquires a fourth data flow identifier, where the fourth data flow identifier is the target a data flow identifier supported by the base station and not included in the first data flow identifier;
  • the target base station identifies the third data stream identifier and the fourth data stream identifier as a second data stream identifier used by the target base station to interact with the user terminal.
  • an embodiment of the present invention provides a handover method based on a robust header compression ROHC protocol, where the method includes:
  • the source base station acquires first ROHC context information, and sends the first ROHC context information to the target base station.
  • the first ROHC context information includes: a first service flow identifier, a first data flow identifier, a first ROHC operation mode, a first compression end, and a decompression end state used when the source base station interacts with the user terminal. And a first state context and the source base station and the first dynamic context.
  • an embodiment of the present invention provides a target base station, where the target base station includes a receiving unit and a learning unit, where:
  • the receiving unit is configured to receive first ROHC context information
  • the learning unit is configured to learn the first ROHC context information to obtain second ROHC context information.
  • the first ROHC context information includes: a first service flow identifier used by the source base station to interact with the user terminal, a first data flow identifier, a first ROHC operation mode, a first compression end, and a decompression a state of the end, a first static context, and the source base station and the first dynamic context;
  • the second ROHC context information includes: a second service flow identifier, a second data flow identifier, a second ROHC operation mode, a second compression end, and a decompression end state used when the target base station interacts with the user terminal, The second static context and the second dynamic context.
  • the learning unit specifically includes a first learning module, a second learning module, a third learning module, a fourth learning module, a fifth learning module, and a sixth learning module; wherein:
  • the first learning module is configured to use a second to interact with the user terminal
  • the operating mode of the ROHC is selected as the first ROHC operating mode
  • the second learning module is configured to select a state of the second compression end and the decompression end used by the user to interact with the user terminal, and select the state of the first compression end and the decompression end;
  • the third learning module is configured to use the first static context as a second static context used by the user to interact with the user terminal, where the second static context is used to distinguish the service flow;
  • the fourth learning module is configured to use the first dynamic context as a second dynamic context used by the user to interact with the user terminal, where the second dynamic context is used to perform compression and decompression processing;
  • the fifth learning module is configured to set a second service flow identifier used by the user to interact with the user terminal according to the first service flow identifier and the state of the target base station; the sixth learning module, The configuration is configured to set a second data flow identifier used by the user to interact with the user terminal according to the first data flow identifier and the self-state of the target base station.
  • the fifth learning module includes a first determining submodule, a first obtaining submodule, and a first learning submodule, where:
  • the first determining submodule is configured to determine, according to the status of the target base station, a third service flow identifier from the first service flow identifier, where the third service flow identifier is supported by the target base station a service flow identifier;
  • the first obtaining sub-module is configured to obtain a fourth service flow identifier, where the fourth service flow identifier is a service flow identifier that is supported by the target base station and is not included in the first service flow identifier.
  • the first learning sub-module is configured to use the third service flow identifier and the fourth service flow identifier together as a second service flow identifier used by the target base station to interact with the user terminal;
  • the sixth learning module includes a second determining submodule, a second obtaining submodule, and a second learning submodule, where:
  • the second determining submodule is configured to determine, according to the status of the target base station, a third data flow identifier from the first service flow identifier, where the third data flow identifier is supported by the target base station a data stream identifier;
  • the second obtaining sub-module is configured to obtain a fourth data stream identifier, where the fourth data stream identifier is a data stream identifier that is supported by the target base station and is not included in the first data stream identifier.
  • the second learning submodule is configured to use the third data stream identifier and the fourth data stream identifier together as a second data stream identifier used by the target base station to interact with the user terminal.
  • a source base station is provided by the embodiment of the present invention, where the source base station includes an acquiring unit and a sending unit, where:
  • the acquiring unit is configured to acquire first ROHC context information
  • the sending unit is configured to send the first ROHC context information to a target base station.
  • the first ROHC context information includes: a first service flow identifier used by the source base station to interact with the user terminal, a first data flow identifier, a first ROHC operation mode, a first compression end, and a decompression end. a state, a first static context, and the source base station and the first dynamic context.
  • an embodiment of the present invention provides a handover system based on a robust header compression ROHC protocol, where the system source base station and target base station, where:
  • the base station includes an obtaining unit and a sending unit; wherein:
  • the acquiring unit is configured to acquire first ROHC context information
  • the sending unit is configured to send the first ROHC context information to a target base station;
  • the target base station includes a receiving unit and a learning unit, where:
  • the receiving unit is configured to receive first ROHC context information;
  • the learning unit is configured to learn the first ROHC context information to obtain second ROHC context information.
  • the first ROHC context information includes: a first service flow identifier used by the source base station to interact with the user terminal, a first data flow identifier, a first ROHC operation mode, a first compression end, and a decompression end.
  • the second ROHC context information includes: a second service flow identifier used by the target base station to interact with the user terminal, a second data flow identifier, The second ROHC operating mode, the state of the second compression end and the decompression end, the second static context, and the second dynamic context.
  • the learning unit includes a first learning module, a second learning module, a third learning module, a fourth learning module, a fifth learning module, and a sixth learning module; wherein:
  • the first learning module is configured to select an operation mode of the second ROHC used by the user to interact with the user terminal, and select the first ROHC operation mode;
  • the second learning module is configured to select a state of the second compression end and the decompression end used by the user to interact with the user terminal, and select the state of the first compression end and the decompression end;
  • the third learning module is configured to use the first static context as a second static context used by the user to interact with the user terminal, where the second static context is used to distinguish the service flow;
  • the fourth learning module is configured to use the first dynamic context as a second dynamic context used by the user to interact with the user terminal, where the second dynamic context is used for performing compression and decompression processing;
  • the fifth learning module is configured to set a second service used by the user to interact with the user terminal according to the first service flow identifier, the first data flow identifier, and the status of the target base station.
  • the sixth learning module is configured to identify, according to the first service flow identifier, the first data The stream identifier and the state of the target base station are set, and the second data stream identifier used by the user to interact with the user terminal is set.
  • the fifth learning module includes a first determining submodule, a first obtaining submodule, and a first learning submodule, where:
  • the first determining submodule is configured to determine, according to the status of the target base station, a third service flow identifier from the first service flow identifier, where the third service flow identifier is supported by the target base station a service flow identifier;
  • the first obtaining sub-module is configured to obtain a fourth service flow identifier, where the fourth service flow identifier is a service flow identifier that is supported by the target base station and is not included in the first service flow identifier.
  • the first learning sub-module is configured to use the third service flow identifier and the fourth service flow identifier together as a second service flow identifier used by the target base station to interact with the user terminal;
  • the sixth learning module includes a second determining submodule, a second obtaining submodule, and a second learning submodule, where:
  • the second determining submodule is configured to determine, according to the status of the target base station, a third data flow identifier from the first service flow identifier, where the third data flow identifier is supported by the target base station a data stream identifier;
  • the second obtaining sub-module is configured to obtain a fourth data stream identifier, where the fourth data stream identifier is a data stream identifier that is supported by the target base station and is not included in the first data stream identifier.
  • the second learning submodule is configured to use the third data stream identifier and the fourth data stream identifier together as a second data stream identifier used by the target base station to interact with the user terminal.
  • an embodiment of the present invention provides a computer storage medium, where the computer is readable
  • the computer-executable instructions are used to execute the ROHC protocol-based switching method provided by the foregoing embodiments.
  • the handover method, the system, the source base station, the target base station, and the storage medium are provided in the embodiment of the present invention.
  • the source base station sends the first ROHC context information to the target base station, so that the target base station can use the first ROHC.
  • the context information is learned, and the second ROHC context information is obtained, so that the user terminal can maintain high compression efficiency after switching between the base stations.
  • FIG. 1 is a schematic diagram of an application scenario according to an embodiment of the present disclosure
  • FIG. 2 is a schematic flowchart of a handover method based on the ROHC protocol according to an embodiment of the present invention
  • FIG. 3 is a schematic flowchart of another handover method based on the ROHC protocol according to an embodiment of the present invention
  • FIG. 4 is a schematic diagram of ROHC based on an embodiment of the present invention. Detailed flow chart of the protocol switching method
  • FIG. 5 is a schematic structural diagram of a target base station according to an embodiment of the present invention.
  • FIG. 6 is a schematic structural diagram of a source base station according to an embodiment of the present invention.
  • FIG. 7 is a schematic structural diagram of a handover system based on the ROHC protocol according to an embodiment of the present invention
  • FIG. 8 is a schematic structural diagram of another handover system based on the ROHC protocol according to an embodiment of the present invention
  • FIG. 9 is a schematic diagram of ROHC based on an embodiment of the present invention.
  • Schematic diagram of a switching system of a protocol
  • FIG. 10 is a schematic structural diagram of another switching system based on the ROHC protocol according to an embodiment of the present invention.
  • FIG. 1 In order to clearly explain the technical solution of the embodiment of the present invention, it can be as shown in FIG.
  • S AE system architecture evolution
  • FIG. 1 In the application scenario of the system architecture evolution (S AE , System Architecture Evolution ) system, the technical solution mentioned in the embodiment of the present invention is described. It is worth noting that the technical solution provided by the application scenario is only used in the scenario, and can be understood. In the application scenario similar to the application scenario, the technical solution proposed by the embodiment of the present invention is still applicable.
  • S AE System Architecture Evolution
  • the base station A12 and the base station B13 may be an evolved base station (eNB), and the mobility management entity 14 (MME, Mobility Management Entity) is configured to be responsible for mobility management, signaling processing, and the like; (S-GW, Serving Gateway) is responsible for media stream processing and forwarding functions; the packet data gateway 16 (P-GW, PDN Gateway) is an interface gateway to the external network.
  • MME Mobility Management Entity
  • S-GW Serving Gateway
  • P-GW Packed Gateway
  • the UE 11 When the user equipment (UE, User Equipment) 11 moves from the coverage of the base station A12 to the coverage of the base station B13, the UE 11 needs to switch from the base station A 12 to the base station B 13 as indicated by the dotted arrow.
  • the base station A12 It may be referred to as a source base station
  • the base station B13 may be referred to as a target base station.
  • the base station B 13 After switching to the base station B 13, the base station B 13 does not have context information about the ROHC with the UE 11, therefore, in the existing technical background, after the handover is completed, both the UE 11 and the target base station B 13 need to re-from the most The original state begins to learn, and maintains the context information of the ROHC, so that the UE 11 and the target base station B 13 respectively obtain the ROHC information required for the ROHC processing in the interaction process, so that the user terminal switches between the base stations. , ROHC compression efficiency is extremely low.
  • a ROHC protocol-based handover method provided in the application scenario shown in FIG. 1 according to an embodiment of the present invention includes the following steps:
  • the target base station receives the first ROHC context information sent by the source base station.
  • the target base station may receive the first ROHC context information from the source base station at any time during the handover process between the base stations.
  • the first ROHC context information may be received in the manner of ROHC synchronization information.
  • the embodiment of the invention does not limit this;
  • the specific form of the ROHC synchronization information may be a separate signaling message, or may be added to the message sent by the source base station in the form of a custom field in the handover process, and the embodiment of the present invention does not: any limited.
  • the first ROHC context information is: ROHC context information used by the ROHC when the source base station interacts with the user terminal;
  • the first ROHC context information may include: a first service flow identifier used by the source base station to interact with the user terminal, a first data flow identifier, a first ROHC operation mode, a first compression end, and The state of the decompressed end, the first static context, and the first dynamic context; wherein: the first service flow identifier and the first data flow identifier are identifiers of the service flow and the data flow supported by the source base station when interacting with the user terminal
  • the first ROHC operation mode is an operation mode of the ROHC when the source base station interacts with the user terminal; the state of the first compression end and the decompression end is a compression end and a decompression end of the ROHC when the source base station interacts with the user terminal
  • a first static context is a static context required for the ROHC to be performed when the source base station interacts with the user terminal; the first dynamic context is a dynamic context required for the ROHC to be performed when the source base station interacts with the user terminal.
  • the target base station learns the first ROHC context information to obtain second ROHC context information.
  • the second ROHC context information is: ROHC context information used by the OHC when the target base station interacts with the user terminal;
  • the second ROHC context information may include: a second service flow identifier, a second data flow identifier a second ROHC operating mode, a state of the second compression end and the decompression end, a second static context, and a second dynamic context;
  • the specific description of the second ROHC context information is similar to the related explanation of the first ROHC context information in step S201, where the second service flow identifier and the second data stream identifier are all when the target base station interacts with the user terminal.
  • the identification of the service flow and the data flow of the supported ROHC; the second ROHC operation mode is to perform the ROHC when the target base station interacts with the user terminal a mode of the second compression end and the decompression end is a state of performing a compression end and a decompression end of the ROHC when the target base station interacts with the user terminal;
  • the second static context and the second dynamic context are the target base station and the The static context and dynamic context required by the ROHC are performed when the user terminal interacts.
  • the target base station learns the first ROHC context information to obtain a second
  • ROHC context information including:
  • the operation mode of the second ROHC used by the target base station to interact with the user terminal is selected as the first ROHC operation mode
  • the state of the second compression end and the decompression end used by the target base station to interact with the user terminal is selected as the state of the first compression end and the decompression end;
  • the target base station uses the first static context as a second static context that is used by the user to interact with the user terminal, and the second static context is used to distinguish the service flow;
  • the dynamic context is used as a second dynamic context that is used by the user to interact with the user terminal, where the second dynamic context is used for performing compression and decompression processing; and the target base station is configured according to the first service flow identifier and the target base station. a self-state, setting a second service flow identifier used by the user to interact with the user terminal;
  • the target base station sets a second data stream identifier used by the target base station to interact with the user terminal according to the first data stream identifier and the status of the target base station.
  • the target base station sets the second service flow identifier used by the target base station to interact with the user terminal according to the first service flow identifier and the state of the target base station, which may specifically include:
  • the target base station Determining, by the target base station, the third service flow identifier from the first service flow identifier, where the third service flow identifier is a first service flow identifier supported by the target base station;
  • the target base station acquires a fourth service flow identifier, where the fourth service flow identifier is the target a service flow identifier supported by the base station and not included in the first service flow identifier;
  • the target base station uses the third service flow identifier and the fourth service flow identifier as the second service flow identifier used by the target base station to interact with the user terminal;
  • the target base station is configured to set the second service flow identifier used by the target base station to interact with the user terminal according to the first data flow identifier and the self-state of the target base station, and specifically includes:
  • the target base station acquires a fourth data flow identifier, where the fourth data flow identifier is a data flow identifier supported by the target base station and not included in the first data flow identifier;
  • the target base station identifies the third data stream identifier and the fourth data stream identifier as a second data stream identifier used by the target base station to interact with the user terminal.
  • the difference between the second ROHC context information and the first ROHC context information is determined according to the relationship and the difference between the target base station and the source base station. For example, in this embodiment, as shown in FIG. When the target base station B 13 and the source base station A 12 are connected to the same S-GW 15 , for the UE 11 , the uplink and downlink data communication by the target base station B 13 and the uplink and downlink data communication by the source base station A 12 are substantially It is the same, therefore, the difference between the first ROHC context information and the second ROHC context information is not large.
  • the difference between the second ROHC context information and the first ROHC context information will be relative. It is to be understood that the embodiment of the present invention does not specifically limit this.
  • the embodiment of the present invention provides a handover method based on the ROHC protocol.
  • the source base station acquires the first ROHC context information, and sends the first ROHC context information to the target base station, so that the target base station can ROHC context information learning
  • the second ROHC context information is obtained, and thus, the user terminal can maintain high compression efficiency after switching between the base stations.
  • a handover method based on the ROHC protocol provided by the embodiment of the present invention may further include the following steps:
  • the source base station acquires the first ROHC context information.
  • the source base station sends the first ROHC context information to the target base station.
  • the source base station may send the first ROHC context information to the target base station at any time during the handover process between the base stations, so that the target base station is
  • the first ROHC context information is learned to obtain second ROHC context information used by the target base station to interact with the user terminal.
  • the first ROHC context information may be sent in the manner of ROHC synchronization information, which is not limited in this embodiment of the present invention.
  • the specific form of the ROHC synchronization information may be a separate signaling message. It may be added to the message sent by the source base station in the form of a custom field in the handover process, and the like in the embodiment of the present invention.
  • the first ROHC context information is: ROHC context information used by the ROHC when the source base station interacts with the user terminal;
  • the first ROHC context information includes: a first service flow identifier used by the source base station to interact with the user terminal, a first data flow identifier, a first ROHC operation mode, a state of the first compression end and a decompression end, a first static context and a first dynamic context; wherein, the first service flow identifier and the first data flow identifier are identifiers of the service flow and the data flow of the supported ROHC when the source base station interacts with the user terminal;
  • the operating mode is an operation mode of the ROHC when the source base station interacts with the user terminal;
  • the state of the first compression end and the decompression end is a state of performing a compression end and a decompression end of the ROHC when the source base station interacts with the user terminal;
  • a static context is a static context required by the ROHC when the source base station interacts with the user terminal;
  • the first dynamic context is a dynamic context required for the ROHC to be performed when the source base station interacts with the user terminal.
  • the embodiment of the present invention provides a handover method based on the ROHC protocol, in which the source base station sends the first ROHC context information to the target base station, so that the target base station can learn the first ROHC context information, and obtain The second ROHC context information, in this way, enables the user terminal to maintain a high compression efficiency after switching between base stations.
  • a detailed process of a ROHC protocol-based handover method provided in the application scenario shown in FIG. 1 according to an embodiment of the present invention includes the following steps:
  • Step 401 The source base station sends the first ROHC context information to the target base station.
  • the UE 11 when the UE 11 is moved by the area covered by the source base station (base station A 12 ) to the area covered by the target base station (base station B 13 ), the signal strength of the UE 11 to each base station ( For example, the base station A 12 and the base station B 13 perform measurement, and send the measured result as a measurement report to the source base station; the source base station determines whether the UE can still serve the UE according to the measurement report, and when the result of the judgment is that the service cannot be continued.
  • another base station (base station B 13 in this embodiment) is selected as the target base station for handover.
  • the source base station sends a Handover Request message to the target base station, and starts to switch the UE 11 from the source base station to the target base station.
  • the specific handover process is well-known in the art, and is not described here.
  • the source base station may send the first ROHC context information to the target base station in the manner of ROHC synchronization information, in a specific manner, the source base station may use the ROHC.
  • the synchronization information is added as a custom field in the handover request message, and the handover request message is sent to the target base station.
  • the source base station may send a ROHC synchronization message to the target base station after sending the handover request message to the target base station.
  • the specific manner of sending the first ROHC context information is within the protection scope of the embodiment of the present invention.
  • the first ROHC context information may be used when the source base station interacts with the user terminal.
  • ROHC context information used by ROHC may be used when the source base station interacts with the user terminal.
  • the first ROHC context information may include: a first service flow identifier used when the source base station interacts with the user terminal, a first data flow identifier used when the source base station interacts with the user terminal, and used for the source a first ROHC operation mode used by the base station to interact with the user terminal, a state of the first compression end and the decompression end used when the source base station interacts with the user terminal, and a first static used when the source base station interacts with the user terminal.
  • the first ROHC operation mode is a state in which the compressed end and the decompressed end of the ROHC are performed when the source base station performs ROHC when interacting with the user terminal, where the first static context and the first dynamic context are the source base station and the user The static context required for ROHC when the terminal interacts
  • Mode can be taken as: Unidirectional (U, Unidirectional) mode, Preferred (0, Optimistic) mode, Reliable (R, Reliable) mode.
  • State value The state of the initial state (I, Initiation and Refresh state), the state of the first order state (FO, First Order state), the state of the second order state (Second Order state); the state of the decompression is the state without context ( NC, No Context state ) state, full context state (FC, Full Context state) state, static context state (SC, Static Context state) state.
  • StaticFiled mainly refers to the IP source The address, IP destination address, UDP source port, UDP destination port, etc. can distinguish the field of the service flow information, usually also the static context information.
  • Reffiled mainly refers to the reference value information of some key fields, including: network packet identification number (IPID, Internet Protocol ID) field, time stamp (TS, Time Stamp) field, serial number (SN, Sequence Number) field, etc., usually also Dynamic context information.
  • IPID Internet Protocol ID
  • TS Time Stamp
  • SN Sequence Number
  • Step 402 After the user terminal switches, the target base station learns the first ROHC context information to obtain second ROHC context information.
  • the target base station may learn the first ROHC context information after receiving the first ROHC context information.
  • the target base station may learn the first ROHC context information as shown in Table 1.
  • the second ROHC context information used by the ROHC is obtained when the user terminal interacts with the user terminal, and the second ROHC context information may be used: the second service flow identifier used when the target base station interacts with the user terminal, a second data stream identifier used when the target base station interacts with the user terminal, and a second ROHC operation mode used when the target base station interacts with the user terminal, for the target base station a state of a second compression end and a decompression end used when interacting with the user terminal, a second static context used when the target base station interacts with the user terminal, and for the target base station and the user
  • the second dynamic context used by the terminal to interact with each other is specifically described in the foregoing embodiment, and details are not described herein again.
  • the target base station learns the first ROHC context information, and the specific process of obtaining the second ROHC context information may include:
  • the operation mode of the second ROHC used by the target base station to interact with the user terminal is selected as the first ROHC operation mode
  • the state of the second compression end and the decompression end used by the target base station to interact with the user terminal is selected as the state of the first compression end and the decompression end;
  • the target base station interacts with the user terminal as the first static context a second static context used, the second static context is used to distinguish the service flow; the target base station uses the first dynamic context as the second dynamic context used by itself to interact with the user terminal
  • the second dynamic context is used to perform compression and decompression processing;
  • the target base station sets a second service flow identifier used by the target base station to interact with the user terminal according to the first service flow identifier and the state of the target base station;
  • the target base station sets a second data stream identifier used by the target base station to interact with the user terminal according to the first data stream identifier and the state of the target base station.
  • the target base station sets the second service flow identifier used by the target base station to interact with the user terminal according to the first service flow identifier and the state of the target base station, and specifically includes:
  • the target base station acquires a fourth service flow identifier, where the fourth service flow identifier is a service flow identifier that is supported by the target base station and is not included in the first service flow identifier.
  • the target base station uses the third service flow identifier and the fourth service flow identifier together as a second service flow identifier used by the target base station to interact with the user terminal;
  • the target base station sets the second service flow identifier used by the target base station to interact with the user terminal according to the first data flow identifier and the self-state of the target base station, including:
  • the target base station acquires a fourth data flow identifier, where the fourth data flow identifier is the target a data flow identifier supported by the base station and not included in the first data flow identifier;
  • the target base station identifies the third data stream identifier and the fourth data stream identifier as a second data stream identifier used by the target base station to interact with the user terminal.
  • the number of second data stream identifiers is determined according to the number supported by the target base station itself, that is, even if the first data stream identifier is supported by the target base station, when the first data stream is When the number of identifiers is different from the number supported by the target base station itself, the number supported by the target base station itself shall prevail.
  • the difference between the second ROHC context information and the first ROHC context information is determined according to the relationship and difference between the target base station and the source base station, for example, in this embodiment, as shown in FIG.
  • the target base station and the source base station are connected to the same S-GW, for the user terminal, the uplink and downlink data communication by the target base station and the uplink and downlink data communication by the source base station are substantially the same, therefore,
  • the difference between a ROHC context information and the second ROHC context information is not large; and when the target base station and the source base station are respectively connected to different S-GWs, even when different S-GWs are respectively managed by different MMEs,
  • the difference between the two ROHC context information and the first ROHC context information will be relatively large, and it should be understood that the embodiment of the present invention does not specifically limit this.
  • the difference between the first ROHC context information and the second ROHC context information only reflects the difference between the source base station and the target base station, and the user terminal side does not change. Therefore, when the user terminal completes the handover, the target is After the base station sends the handover confirmation information, the user terminal side can perform packet header compression with the target base station by using the second ROHC context information without any change, and does not need to be re-in between the original state and the target base station. The mutual learning and maintenance of the context is performed, thereby improving the compression efficiency of the ROHC after the handover process.
  • a target base station 50 includes: a receiving unit 501 and a learning unit 502, where:
  • the receiving unit 501 is configured to receive the first ROHC context information sent by the source base station, and the learning unit 502 is configured to learn the first ROHC context information to obtain the second ROHC context information.
  • the receiving and receiving unit 501 can receive the first ROHC context information from the source base station at any time during the handover process between the base stations.
  • the first ROHC context information may be performed by using the ROHC synchronization information.
  • the specific form of the ROHC synchronization information may be a separate signaling message, or may be added to the source base station in the form of a custom field during the handover process.
  • the first ROHC context information is: ROHC context information used by the ROHC when the source base station interacts with the user terminal;
  • the first ROHC context information may include: a first service flow identifier used when the source base station interacts with the user terminal, and used when the source base station interacts with the user terminal a first data stream identifier, a first ROHC operation mode used when the source base station interacts with the user terminal, and a first compression end used when the source base station interacts with the user terminal a state of the decompression end, a first static context used when the source base station interacts with the user terminal, and a first dynamic context used when the source base station interacts with the user terminal; wherein, the first The service flow identifier and the first data flow identifier are identifiers of the service flow and the data flow of the supported ROHC when the source base station interacts with the user terminal, and the first ROHC operation mode is that the source base station interacts with the user terminal to perform ROHC.
  • the operation mode, the state of the first compression end and the decompression end is a state in which the compression end and the decompression end of the ROHC are performed when the source base station interacts with the user terminal, the first static state Below and the first dynamic context is The static context and the dynamic context required by the ROHC are performed when the source base station interacts with the user terminal.
  • the corresponding content is shown in Table 1, and details are not described herein.
  • the second ROHC context information is ROHC context information used by the target base station 50 to perform ROHC when interacting with the user terminal.
  • the second ROHC context information may also include: a second service flow identifier used by the target base station 50 to interact with the user terminal, and the target base station 50 and a second data stream identifier used by the user terminal to interact with, a second ROHC operation mode used by the target base station 50 to interact with the user terminal, a second compression end and a decompression end state used by the target base station 50 to interact with the user terminal,
  • the second static context used by the target base station 50 to interact with the user terminal and the second dynamic context used by the target base station 50 to interact with the user terminal are specifically described in the foregoing embodiments, and details are not described herein again.
  • the learning unit 502 includes a first learning module, a second learning module, a third learning module, a fourth learning module, a fifth learning module, and a sixth learning module; wherein:
  • the first learning module is configured to select an operation mode of the second ROHC used by the target base station 50 to interact with the user terminal, and select the first ROHC operation mode;
  • the second learning module configured a state of the second compression end and the decompression end used to interact the target base station 50 with the user terminal, and select the state of the first compression end and the decompression end;
  • the third learning module is configured to use the first static context as a second static context used by the user to interact with the user terminal, where the second static context is used to distinguish the service flow;
  • the fourth learning module is configured to use the first dynamic context as a second dynamic context used by the user to interact with the user terminal, where the second dynamic context is used to perform compression and decompression processing;
  • the fifth learning module is configured to set a second service flow identifier used by the user to interact with the user terminal according to the first service flow identifier and the state of the target base station 50;
  • the sixth learning module is configured to set a second data flow identifier used by the user to interact with the user terminal according to the first data flow identifier and the state of the target base station.
  • the fifth learning module includes a first determining submodule, a first obtaining submodule, and a first learning submodule, where:
  • the first determining submodule is configured to determine, according to the status of the target base station, a third service flow identifier from the first service flow identifier, where the third service flow identifier is supported by the target base station a service flow identifier;
  • the first obtaining sub-module is configured to obtain a fourth service flow identifier, where the fourth service flow identifier is a service flow identifier that is supported by the target base station and is not included in the first service flow identifier.
  • the first learning submodule is configured to use the third service flow identifier and the fourth service flow identifier together as the second service flow identifier used by the target base station 50 to interact with the user terminal;
  • the sixth learning module includes a second determining submodule, a second obtaining submodule, and a second learning submodule, where:
  • the second determining submodule is configured to determine, according to the status of the target base station, a third data flow identifier from the first service flow identifier, where the third data flow identifier is supported by the target base station a data stream identifier;
  • the second obtaining sub-module is configured to obtain a fourth data stream identifier, where the fourth data stream identifier is a data stream identifier that is supported by the target base station and is not included in the first data stream identifier.
  • the second learning submodule is configured to use the third data stream identifier and the fourth data stream identifier together as the second data stream identifier used by the target base station 50 to interact with the user terminal;
  • the number of second data stream identifiers is determined according to the number supported by the target base station itself. It is determined, that is, even if the first data stream identifier is supported by the target base station, when the number of the first data stream identifier is different from the number supported by the target base station itself, it is supported by the target base station itself. The number is subject to.
  • the difference between the second ROHC context information and the first ROHC context information may be determined according to the relationship and difference between the target base station and the source base station, for example, in this embodiment, as shown in FIG.
  • the target base station and the source base station are connected to the same S-GW, for the user terminal, the uplink and downlink data communication by the target base station and the uplink and downlink data communication by the source base station are substantially the same, therefore,
  • the difference between the first ROHC context information and the second ROHC context information is not large; and when the target base station and the source base station are respectively connected to different S-GWs, even when different S-GWs are respectively managed by different MMEs,
  • the difference between the second ROHC context information and the first ROHC context information will be relatively large, and it should be understood that the embodiment of the present invention does not specifically limit this.
  • the difference between the first ROHC context information and the second ROHC context information only reflects the difference between the source base station and the target base station, and the user terminal side does not change. Therefore, when the user terminal completes the handover, the target is After the base station sends the handover confirmation information, the user terminal side can perform packet header compression with the target base station by using the second ROHC context information without any change, and does not need to be re-in between the original state and the target base station. The mutual learning and maintenance of the context is performed, thereby improving the compression efficiency of the ROHC after the handover process.
  • the target base station 50 may further include:
  • the first storage unit 503 is configured to store the second ROHC context information.
  • the first storage unit 503 may specifically include a volatile memory and/or a nonvolatile memory.
  • non-volatile memory includes: read only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable PROM (EEPROM), flash memory and/or Or non-volatile random access memory (NVRAM).
  • Volatile memory includes random access memory (RAM), which acts as an external cache memory.
  • RAM can take many forms, such as synchronous RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDR SDRAM), enhanced SDRAM (ESDRAM), synchronization.
  • the first storage unit 503 is intended to comprise, but is not limited to, those described above or any other suitable type of memory.
  • the embodiment of the present invention provides a target base station 50, in which the target base station 50 receives the first ROHC context information sent by the source base station, and learns according to the first ROHC context information and obtains the second ROHC context information. It can enable the user terminal to maintain high compression efficiency after switching between base stations.
  • a source base station 70 is provided in the embodiment of the present invention.
  • the source base station 70 includes an obtaining unit and a sending unit, where:
  • the obtaining unit 701 is configured to acquire first ROHC context information.
  • the sending unit 702 is configured to send the first ROHC context message to the target base station.
  • the sending unit 701 may be in the process of switching between the base stations.
  • the first ROHC context information is sent to the target base station at any time, so that the target base station learns the first ROHC context information, and obtains the second ROHC context information used by the target base station to interact with the user terminal.
  • the first ROHC context information may be sent in the manner of ROHC synchronization information, which is not limited in this embodiment of the present invention.
  • the specific form of the ROHC synchronization information may be a separate signaling message. It may be added to the message sent by the source base station 70 in the form of a custom field in the handover process, and the like, which is not limited in this embodiment of the present invention.
  • the first ROHC context information is: ROHC context information used by the ROHC when the source base station 70 interacts with the user terminal;
  • the first ROHC context information may include: the source base station 70 and the user terminal a first service flow identifier used by the mutual base station, a first data flow identifier used by the source base station 70 to interact with the user terminal, a first ROHC operation mode used by the source base station 70 to interact with the user terminal, and a source base station 70 interacting with the user terminal
  • the first service flow identifier, the first A data flow identifier is an identifier of a service flow and a data flow of the supported ROHC when the source base station 70 interacts with the user terminal.
  • the first ROHC operation mode is an operation mode of the ROHC when the source base station 70 interacts with the user terminal.
  • a state of the first compression end and the decompression end is a state in which the source base station 70 performs a compression end and a decompression end of the OHC when the user base station interacts with the user terminal, where the first static context and the first dynamic context are the source base station 70 and the The static context and dynamic context required by the ROHC are performed when the user terminal interacts, and the corresponding content is corresponding to the specific field, as shown in Table 1. Not discussed here.
  • the source base station 70 may further include a second storage unit 703 configured to store first ROHC context information.
  • the storage unit 703 may specifically include volatile memory and/or non-volatile. Memory.
  • non-volatile memory includes: read only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable PROM (EEPROM), flash memory and/or Or Non-Volatile Random Access Memory (NVRAM) 0 Volatile memory includes random access memory (RAM), which can function as an external cache memory.
  • RAM can take many forms, such as synchronous RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDR SDRAM), enhanced SDRAM (ESDRAM), Synchronous Link DRAM (SLDRAM) and Direct Rambus RAM (DRRAM).
  • SRAM synchronous RAM
  • DRAM dynamic RAM
  • SDRAM synchronous DRAM
  • DDR SDRAM double data rate SDRAM
  • ESDRAM enhanced SDRAM
  • SLDRAM Synchronous Link DRAM
  • DRRAM Direct Rambus RAM
  • Storage unit 702 is intended to comprise, but is not limited to, these or any other suitable types of memory.
  • the embodiment of the present invention provides a source base station 70.
  • the source base station 70 sends the first ROHC context information to the target base station, so that the target base station can learn according to the first ROHC context information and obtain the second ROHC.
  • Contextual information that enables users After the terminal switches between base stations, the terminal still maintains high compression efficiency.
  • a handover system 90 based on the ROHC protocol may include: the source base station 70 according to any of the foregoing embodiments and the target base station 50 described in any of the foregoing embodiments.
  • the system may further include a user terminal 100, wherein the user terminal 100 may be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a personal digital assistant (PDA), and a wireless connection capable.
  • the user terminal 100 may be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a personal digital assistant (PDA), and a wireless connection capable.
  • SIP Session Initiation Protocol
  • PDA personal digital assistant
  • Handheld devices, smartphones, tablets, and other devices are not limited in any way.
  • the embodiment of the present invention provides a handover system 90 based on the ROHC protocol.
  • the source base station 70 sends the first ROHC context information to the target base station 50, so that the target base station 50 can use the first ROHC context information.
  • Learning and obtaining the second ROHC context information enables the user terminal 100 to maintain high compression efficiency after switching between the base stations.
  • the receiving unit and the learning unit in the target base station, the modules included in the learning unit, and the respective submodules included in the module may be implemented by a processor in the target base station;
  • the obtaining unit and the sending unit in the source base station provided by the embodiment of the invention may be implemented by a processor in the source base station; of course, it may also be implemented by a specific logic circuit; in the process of the specific embodiment, the processor may be central A CPU (Central Processing Unit), a Microprocessor Unit (MPU), a Digital Signal Processor (DSP), or a Field Programmable Gate Array (FPGA).
  • CPU Central Processing Unit
  • MPU Microprocessor Unit
  • DSP Digital Signal Processor
  • FPGA Field Programmable Gate Array
  • the above ROHC protocol-based switching method is implemented in the form of a software function module, and is sold or used as a stand-alone product, it may also be stored in a computer readable storage medium.
  • the technical solution of the embodiments of the present invention may be embodied in the form of a software product in essence or in the form of a software product.
  • the computer software product is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, server, or network device, etc.) to perform all or part of the methods described in various embodiments of the present invention.
  • the foregoing storage medium includes: a U disk, a removable hard disk, a read only memory (ROM), a magnetic disk or an optical disk, and the like, which can store program codes.
  • ROM read only memory
  • magnetic disk or an optical disk and the like, which can store program codes.
  • the embodiment of the present invention further provides a computer readable storage medium, where the computer readable storage medium stores computer executable instructions, where the computer executable instructions are used to perform the foregoing embodiments of the present invention.
  • the first ROHC context information sent by the source base station is received; the first ROHC context information is learned, and the second ROHC context information is obtained; thus, in the handover process of the user equipment, the source base station sends the target base station to the target base station.
  • the first ROHC context information enables the target base station to learn the first ROHC context information and obtain the second ROHC context information, so that the user terminal can maintain high compression efficiency after switching between the base stations.

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  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

Conformément à un mode de réalisation, la présente invention concerne un procédé de commutation basé sur un protocole de compression d'en-tête robuste (ROHC), une station de base source, une station de base cible, un système et un support d'informations, le procédé comprenant les opérations suivantes : une station de base cible reçoit des premières informations contextuelles de ROHC transmises par une station de base source ; et la station de base cible apprend les premières informations contextuelles de ROHC pour obtenir des secondes informations contextuelles de ROHC.
PCT/CN2014/080111 2013-12-09 2014-06-17 Procédé de commutation, station de base source, station de base cible, système et support d'informations WO2015085741A1 (fr)

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