JP2017503449A - Switching method, source base station, target base station, system, storage medium - Google Patents

Abstract

In an embodiment of the present invention, a switching method based on a robust header compression (ROHC) protocol, a source base station, a target base station, a system, and a storage medium are disclosed, in which the target base station is transmitted from a source base station. Receiving one ROHC context information, and a target base station learning the first ROHC context information to obtain second ROHC context information.

Description

  The present invention relates to a wireless communication area switching technique, and more particularly, to a switching method based on a robust header compression (ROHC) protocol, a source base station, a target base station, a system, and a storage medium.

  ROHC is a general-purpose compression technology based on the Internet Protocol (IP), and any standard of 3G (The Third Generation) mobile communication is a technology such as Long Term Evolution (LTE). ROHC, which can also be applied to, can compress the excessive header byte count to about 1 byte under extremely bad channel conditions, greatly improving the bandwidth utilization rate.

  The ROHC can operate to realize header compression and decompression by a compressor and a decompressor, respectively, between the base station and the user terminal. In compression and decompression, the compressor and the decompressor are each required to hold context information in order to efficiently maintain the compression efficiency. In order to obtain the context information, learning by the compressor and the decompressor is required. If it is necessary and the context information is lost, the ROHC must be restored to the initial state and learned again to hold a new context, but the ROHC compression efficiency during learning is very low. For this reason, when the user terminal moves from the reception area of the base station A to the reception area of the other base station B, the user terminal is switched from the base station A to the base station B. Context information cannot be acquired without re-learning by ROHC, and as a result, after the user terminal is switched between base stations, the ROHC compression efficiency is very high. Lower.

  In view of this, an embodiment of the present invention provides a switching method based on a robust header compression protocol, a source base station, and a target base station that can maintain high compression efficiency even after a user terminal is switched between base stations. , System and storage medium.

  The technical solution of the embodiment of the present invention is achieved as follows.

In a first aspect, according to an embodiment of the present invention, there is provided a switching method based on a robust header compression ROHC protocol, the method comprising:
Receiving first ROHC context information transmitted from a source base station;
Learning the first ROHC context information to obtain second ROHC context information.

The first ROHC context information is ROHC context information used for an interaction between a source base station and a user terminal, and the first ROHC context information is:
A first service stream mark used for interaction between the source base station and the user terminal, a first data stream mark, a first ROHC operation mode, a first compression side and a decompression state; Including a first static context and a first dynamic context;
The second ROHC context information includes a second service stream mark used for interaction between a target base station and the user terminal, a second data stream mark, a second ROHC operation mode, and a second ROHC operation mode. Preferably, it includes a compression side and a decompression side state, a second static context, and a second dynamic context.

The target base station learning the first ROHC context information to obtain second ROHC context information,
The target base station selects the first ROHC operation mode as a second ROHC operation mode used for interaction between the target base station and the user terminal;
The target base station selects the first compression side and decompression side states as the second compression side and decompression side states used for the interaction between itself and the user terminal;
The target base station uses the first static context as a second static context used for interaction between itself and the user terminal, and a second static context for distinguishing service streams And
The target base station is a second dynamic context used for an interaction between the first dynamic context and the user terminal, and a second dynamic context for performing compression and decompression processing. As context,
The target base station sets a second service stream mark used for an interaction between the target base station and the user terminal based on the first service stream mark and the state of the target base station itself;
The target base station sets a second data stream mark used for an interaction between the target base station and the user terminal based on the first data stream mark and the state of the target base station itself; It is preferable to contain.

Based on the first service stream mark and the state of the target base station itself, the target base station sets a second service stream mark used for interaction between the target base station and the user terminal,
The target base station determines a third service stream mark, which is a first service stream mark supported by the target base station, from the first service stream mark based on the state of the target base station itself. And
The target base station obtains a fourth service stream mark that is supported by the target base station and is a service stream mark not included in the first service stream mark;
The target base station sets the third service stream mark as the second service stream mark used for the interaction between the target base station and the user terminal together with the fourth service stream mark. Including
Correspondingly, a second service used by the target base station for interaction between the target base station and the user terminal based on the first data stream mark and the state of the target base station itself. Setting the stream mark
The target base station determines a third data stream mark, which is a first data stream mark supported by the target base station, from the first data stream mark based on the state of the target base station itself. And
The target base station obtains a fourth data stream mark that is supported by the target base station but is not included in the first data stream mark;
The target base station sets the third data stream mark together with the fourth data stream mark as a second data stream mark used for interaction between the target base station and the user terminal; It is preferable to include.

In a second aspect, according to an embodiment of the present invention, there is provided a switching method based on a robust header compression ROHC protocol, the method comprising:
The source base station obtaining first ROHC context information and transmitting to the target base station.

  The first ROHC context information includes a first service stream mark, a first data stream mark, a first ROHC operation mode, and a first compression used for interaction between the source base station and the user terminal. And a decompressed state, a first static context, and a first dynamic context.

In a third invention, according to an embodiment of the present invention, a target base station is provided, and the target base station comprises:
A receiving unit configured to receive first ROHC context information;
A learning unit configured to learn the first ROHC context information to obtain second ROHC context information.

The first ROHC context information includes a first service stream mark used for interaction between a source base station and the user terminal, a first data stream mark, a first ROHC operation mode, Including a compression side and a decompression state, a first static context, and a first dynamic context;
The second ROHC context information includes a second service stream mark used for interaction between a target base station and the user terminal, a second data stream mark, a second ROHC operation mode, and a second ROHC operation mode. Preferably, it includes a compression side and a decompression side state, a second static context, and a second dynamic context.

Specifically, the learning unit is
First learning means configured to select the first ROHC operation mode as a second ROHC operation mode used for interaction between the user terminal and the user terminal;
Second learning means configured to select a state of the first compression side and decompression side as a state of the second compression side and decompression side used for interaction between the user terminal and the user terminal;
The first static context is a second static context used for interaction between the user terminal and the user terminal, and is configured to be a second static context for distinguishing service streams. A third learning means,
The first dynamic context is a second dynamic context used for interaction between itself and the user terminal, and is configured to be a second dynamic context for performing compression and decompression processing. A fourth learning means,
Fifth learning configured to set a second service stream mark to be used for an interaction between the user terminal and the user terminal based on the first service stream mark and the state of the target base station itself Means,
Sixth learning configured to set a second data stream mark used for interaction between the first data stream mark and the target base station itself based on the interaction between the first data stream mark and the user terminal. And means.

The fifth learning means includes
A third service stream mark that is a first service stream mark supported by the target base station is determined from the first service stream mark based on the state of the target base station itself. A first determining sub-means;
First acquisition sub means configured to acquire a fourth service stream mark that is supported by the target base station but is not included in the first service stream mark;
A first learning sub configured to make the third service stream mark together with the fourth service stream mark a second service stream mark used for interaction between the target base station and the user terminal Means,
Correspondingly, the sixth learning means is
A third data stream mark that is a first data stream mark supported by the target base station is determined from the first service stream mark based on the state of the target base station itself. A second decision sub-means;
A second acquisition sub-unit configured to acquire a fourth data stream mark that is supported by the target base station but is not included in the first data stream mark;
A second learning sub configured to make the third data stream mark, together with the fourth data stream mark, a second data stream mark used for interaction between the target base station and the user terminal; And means.

In a fourth invention, according to an embodiment of the present invention, a source base station is provided, and the source base station comprises:
An acquisition unit configured to acquire first ROHC context information;
A transmission unit configured to transmit the first ROHC context information to a target base station.

  The first ROHC context information includes a first service stream mark, a first data stream mark, a first ROHC operation mode, and a first compression used for interaction between the source base station and the user terminal. And a decompressed state, a first static context, and a first dynamic context.

In a fifth aspect, according to an embodiment of the present invention, there is provided a switching system based on a robust header compression ROHC protocol having a source base station and a target base station,
The base station is
An acquisition unit configured to acquire first ROHC context information;
A transmission unit configured to transmit the first ROHC context information to a target base station,
The target base station is
A receiving unit configured to receive first ROHC context information;
A learning unit configured to learn the first ROHC context information to obtain second ROHC context information.

The first ROHC context information includes a first service stream mark, a first data stream mark, a first ROHC operation mode, and a first compression used for interaction between the source base station and the user terminal. Side and decompressor state, a first static context, and a first dynamic context,
The second ROHC context information includes a second service stream mark used for interaction between the target base station and the user terminal, a second data stream mark, a second ROHC operation mode, Preferably, it includes a compression side and a decompression side state, a second static context, and a second dynamic context.

The learning unit is
First learning means configured to select the first ROHC operation mode as a second ROHC operation mode used for interaction between the user terminal and the user terminal;
Second learning means configured to select a state of the first compression side and decompression side as a state of the second compression side and decompression side used for interaction between the user terminal and the user terminal;
The first static context is a second static context used for interaction between the user terminal and the user terminal, and is configured to be a second static context for distinguishing service streams. A third learning means,
The first dynamic context is a second dynamic context used for interaction between itself and the user terminal, and is configured to be a second dynamic context for performing compression and decompression processing. A fourth learning means,
Based on the first service stream mark, the first data stream mark, and the state of the target base station itself, a second service stream mark used for interaction between the user terminal and the user terminal is set. A fifth learning means comprising:
Based on the first service stream mark, the first data stream mark, and the state of the target base station itself, a second data stream mark used for interaction between the user terminal and the user terminal is set. And sixth learning means configured as described above.

The fifth learning means includes
A third service stream mark that is a first service stream mark supported by the target base station is determined from the first service stream mark based on the state of the target base station itself. A first determining sub-means;
First acquisition sub means configured to acquire a fourth service stream mark that is supported by the target base station but is not included in the first service stream mark;
A first learning sub configured to make the third service stream mark together with the fourth service stream mark a second service stream mark used for interaction between the target base station and the user terminal Means,
Correspondingly, the sixth learning means is
A third data stream mark that is a first data stream mark supported by the target base station is determined from the first service stream mark based on the state of the target base station itself. A second decision sub-means;
A second acquisition sub-unit configured to acquire a fourth data stream mark that is supported by the target base station but is not included in the first data stream mark;
A second learning sub configured to make the third data stream mark, together with the fourth data stream mark, a second data stream mark used for interaction between the target base station and the user terminal; And means.

  In a sixth aspect, according to an embodiment of the present invention, a computer-readable storage medium storing a computer-executable command is provided, and the computer-executable command is provided in each embodiment described above. The switching method based on the ROHC protocol is executed.

  According to the switching method, system, source base station, target base station, and storage medium provided in the embodiment of the present invention, the source base station transmits the first ROHC context information to the target base station while the user terminal is switched. Thus, the target base station can learn the first ROHC context information and obtain the second ROHC context information. In this way, the compression efficiency can be improved even after the user terminal is switched between the base stations. Can be held high.

It is a figure which shows the application scene provided in the Example of this invention. It is a figure which shows the flow of the switching method based on the ROHC protocol concerning the Example of this invention. It is a figure which shows the flow of the switching method based on the further ROHC protocol concerning the Example of this invention. It is a figure which shows the detailed flow of the switching method based on the ROHC protocol concerning the Example of this invention. It is a figure which shows the structure of the target base station concerning the Example of this invention. It is a figure which shows the structure of the source base station concerning the Example of this invention. It is a figure which shows the structure of the switching system based on the ROHC protocol concerning the Example of this invention. FIG. 3 is a diagram illustrating the structure of a switching system based on a further ROHC protocol according to an embodiment of the present invention. It is a figure which shows the structure of the switching system based on the ROHC protocol concerning the Example of this invention. FIG. 3 is a diagram illustrating the structure of a switching system based on a further ROHC protocol according to an embodiment of the present invention.

  DESCRIPTION OF EMBODIMENTS The following clearly and completely describes the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention.

  In order to clearly explain the technical solution of the embodiment of the present invention, the technical solution described in the embodiment of the present invention in the application scene of the system architecture evolution (SAE) system as shown in FIG. The application scene can be described as an example to explain the technical solution of the embodiment of the present invention, and the technical solution provided in the embodiment of the present invention is applied only to the scene. It should be noted that there is no meaning, and it is understandable that the technical solution presented in the embodiment of the present invention is applied to an application scene similar to this application scene. In FIG. 1, the base station A12 and the base station B13 may be evolved base stations (eNB, evolved Node B), and the mobility management entity 14 (MME, Mobility Management Entity) has functions such as mobility management and signaling processing. The serving gateway 15 (S-GW, Serving Gateway) is responsible for functions such as media stream processing and transfer, and the packet data gateway 16 (P-GW, PDN Gateway) is an interface gateway with an external network. It is.

  When the user terminal (UE, User Equipment) 11 moves from the coverage of the base station A12 to the coverage of the base station B13, it is necessary to switch the UE11 from the base station A12 to the base station B13, as indicated by the dotted arrow. In this case, the base station A12 may be read as the source base station, and the base station B13 may be read as the target base station. After switching to the base station B13, since the base station B13 does not have the ROHC context information with the UE11, with the background of the prior art, after the switching is completed, both the UE11 and the target base station B13 In order to acquire ROHC information necessary for ROHC processing during interaction, it is necessary to hold ROHC context information while learning again from the initial state. As a result, after the user terminal is switched between base stations, The compression efficiency of ROHC becomes very low.

  Referring to FIG. 2, the switching method based on the ROHC protocol provided in the application scene shown in FIG. 1 according to the embodiment of the present invention includes the following steps S201 to S202.

  S201: The target base station receives the first ROHC context information transmitted from the source base station.

  Illustratively, the target base station can receive the first ROHC context information from the source base station at any time during switching between base stations, and in the present embodiment, the target RO station receives the first ROHC context information as ROHC. The information may be received as synchronization information, but the embodiment of the present invention is not limited to this. Similarly, the specific format of the ROHC synchronization information may be individual signaling information, or it is added in the form of a custom field to the message transmitted from the source base station during switching, etc. However, the embodiment of the present invention is not limited to this at all.

  Here, the first ROHC context information is ROHC context information used when performing ROHC when the source base station and the user terminal interact.

  Further, the first ROHC context information includes a first service stream mark used for interaction between the source base station and the user terminal, a first data stream mark, a first ROHC operation mode, A first compression and decompression state, a first static context, and a first dynamic context, wherein the first service stream mark and the first data stream mark are respectively ROHC service stream and data stream marks supported when the source base station interacts with the user terminal. The first ROHC operation mode is the ROHC when the source base station and the user terminal interact with each other. The operation mode when performing, the state of the first compression side and decompression side is The first static context is a state on the compression side and the decompression side when ROHC is performed when the source base station and the user terminal take an interaction. The first static context is an interaction between the source base station and the user terminal. The first dynamic context is a dynamic context necessary for ROHC when the source base station and the user terminal interact with each other.

  S202: After the user terminal is switched, the target base station learns the first ROHC context information to obtain second ROHC context information.

  Illustratively, the second ROHC context information is ROHC context information used when ROHC is performed when the target base station and the user terminal interact with each other, the second service stream mark, 2 data stream marks, a second ROHC mode of operation, a second compression and decompression state, a second static context, and a second dynamic context.

  The second ROHC context information is specifically described as follows, similar to the first ROHC context information described in step S201. The second service stream mark and the second data stream mark are marks of the ROHC service stream and data stream that are supported when the target base station interacts with the user terminal, respectively, and the second ROHC operation mode is This is an operation mode in the case of performing ROHC when the target base station and the user terminal take an interaction. The states on the second compression side and the decompression side are the interaction between the target base station and the user terminal. The second static context and the second dynamic context are necessary for the ROHC when the target base station and the user terminal interact with each other. Static context and dynamic context.

Here, the target base station learns the first ROHC context information and obtains the second ROHC context information,
The target base station selects the first ROHC operation mode as the second ROHC operation mode used for the interaction between the target base station and the user terminal;
The target base station selects the first compression side and decompression side states as the second compression side and decompression side states used for the interaction between itself and the user terminal;
The target base station uses the first static context as a second static context used for interaction between itself and the user terminal, and a second static context for distinguishing service streams And
The target base station is a second dynamic context used for an interaction between the first dynamic context and the user terminal, and a second dynamic context for performing compression and decompression processing. As context,
The target base station sets a second service stream mark used for an interaction between the target base station and the user terminal based on the first service stream mark and the state of the target base station itself;
The target base station sets a second data stream mark used for an interaction between the target base station and the user terminal based on the first data stream mark and the state of the target base station itself; including.

Further, the target base station may set a second service stream mark used for an interaction between the target base station and the user terminal based on the first service stream mark and the state of the target base station itself. ,In particular,
The target base station determines a third service stream mark, which is a first service stream mark supported by the target base station, from the first service stream mark based on the state of the target base station itself. When,
The target base station obtains a fourth service stream mark that is supported by the target base station and is a service stream mark not included in the first service stream mark;
The target base station sets the third service stream mark as the second service stream mark used for the interaction between the target base station and the user terminal together with the fourth service stream mark. Can include
Correspondingly, a second service used by the target base station for interaction between the target base station and the user terminal based on the first data stream mark and the state of the target base station itself. To set the stream mark, specifically,
The target base station determines a third data stream mark, which is a first data stream mark supported by the target base station, from the first data stream mark based on the state of the target base station itself. And
The target base station obtains a fourth data stream mark that is supported by the target base station but is not included in the first data stream mark;
The target base station sets the third data stream mark together with the fourth data stream mark as a second data stream mark used for interaction between the target base station and the user terminal; Including.

  The difference between the second ROHC context information and the first ROHC context information is determined by the relationship and difference between the target base station and the source base station. For example, in this embodiment, as shown in FIG. In addition, when the target base station B13 and the source base station A12 are connected to the same S-GW 15, for the UE 11, the uplink / downlink data communication by the target base station B13 is abbreviated as the uplink / downlink data communication by the source base station A12. Since they are similar, the difference between the first ROHC context information and the second ROHC context information is not large. On the other hand, when the target base station and the source base station are connected to different S-GWs, and when different S-GWs are managed by different MMEs, the second ROHC context information and the first ROHC It can be understood that the difference from the context information is relatively large and is not specifically limited in the embodiment of the present invention.

  In an embodiment of the present invention, a switching method based on the ROHC protocol is provided, and while the user terminal is switched, the source base station acquires the first ROHC context information and transmits it to the target base station. The second ROHC context information can be obtained by learning the first ROHC context information. In this way, the compression efficiency can be kept high even after the user terminal is switched between base stations.

  Based on the embodiment as shown in FIG. 2, referring to FIG. 3, the switching method based on the ROHC protocol provided in the embodiment of the present invention may further include the following steps S301 to S302.

  S301: The source base station acquires first ROHC context information.

  S302: The source base station transmits the first ROHC context information to the target base station.

  Illustratively, the source base station can send the first ROHC context information to the target base station at any time during the switch between base stations, which allows the target base station to transmit the first ROHC context. The information is learned to obtain second ROHC context information used for the interaction between the target base station and the user terminal. In the present embodiment, the first ROHC context information may be transmitted as the ROHC synchronization information, but the embodiment of the present invention is not limited to this. Similarly, the specific format of the ROHC synchronization information may be individual signaling information, or may be added in the form of a custom field to a message transmitted from the source base station during switching. However, the embodiment of the present invention is not limited to this at all.

  Here, the first ROHC context information is ROHC context information used when performing ROHC when the source base station and the user terminal interact.

  Further, the first ROHC context information includes a first service stream mark used for interaction between a source base station and the user terminal, a first data stream mark, a first ROHC operation mode, 1 compression side and decompression side state, a first static context, and a first dynamic context. The first service stream mark and the first data stream mark are respectively This is a mark of ROHC service stream and data stream supported when interacting with the user terminal, and the first ROHC operation mode is an operation when performing ROHC when the source base station and the user terminal interact. The first compression side and the decompression side state are the source base station and The state of the compression side and the decompression side when ROHC is performed when the user terminal interacts with each other, and the first static context is the ROHC when the source base station and the user terminal interact with each other. It is a necessary static context, and the first dynamic context is a dynamic context necessary for ROHC when the source base station and the user terminal interact.

  In an embodiment of the present invention, a switching method based on the ROHC protocol is provided, and while the user terminal is switched, the source base station transmits the first ROHC context information to the target base station, so that the target base station The ROHC context information can be learned to obtain the second ROHC context information. In this way, the compression efficiency can be kept high even after the user terminal is switched between the base stations.

  Referring to FIG. 4, the detailed flow of the switching method based on the ROHC protocol provided in the application scene shown in FIG. 1 according to the embodiment of the present invention includes the following steps 401 to 402.

  Step 401: A source base station transmits first ROHC context information to a target base station.

  Illustratively, in the application scene as shown in FIG. 1, when the UE 11 moves from the reception area of the source base station (base station A12) to the reception area of the target base station (base station B13), the UE 11 Signal strength (for example, base station A12, base station B13, etc.), the measurement result is transmitted to the source base station as a measurement report, and the target base station provides services for the UE based on the measurement report If it is determined whether or not it is possible to continue, and if it is determined that the service cannot be continued for the UE, the target to be switched is another base station (base station B13 in this embodiment). It will be selected as a base station. At this time, the source base station transmits a switching request (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 switching process is a well-known technique in this field. Therefore, the description thereof is omitted here.

  Note that while the UE 11 is switched from the source base station to the target base station, the source base station can transmit the first ROHC context information as ROHC synchronization information to the target base station. The station may use the ROHC synchronization information as a switching request message to which a custom field is added, and transmit the switching request message to the target base station, or after the source base station transmits the switching request message to the target base station. The ROHC synchronization information may be further transmitted to the target base station. The specific method is not limited at all in the embodiment of the present invention, and any method can be used as long as the first ROHC context information is transmitted to the target base station while the source base station is switched. It is within the protection scope of the embodiment of the present invention.

  Specifically, the first ROHC context information may be ROHC context information used when performing ROHC when the source base station and the user terminal take an interaction.

  Further, the first ROHC context information includes a first service stream mark used for interaction between the source base station and the user terminal, and a first data stream mark used for interaction between the source base station and the user terminal. A first ROHC operation mode used for the interaction between the source base station and the user terminal, a first compression side and a decompression state used for the interaction between the source base station and the user terminal, and the source base A first static context used for the interaction between the station and the user terminal, and a first dynamic context used for the interaction between the source base station and the user terminal, the first service stream Mark and the first data stream mark are respectively a source base Is a mark of ROHC service stream and data stream that is supported when interacting with the user terminal, and the first ROHC operation mode is when ROHC is performed when the source base station and the user terminal interact with each other. The first compression side and the decompression state are operating modes, which are the compression side and decompression side states when ROHC is performed when the source base station and the user terminal interact with each other. The static context and the first dynamic context are a static context and a dynamic context necessary for ROHC when the source base station and the user terminal interact, and correspond to each other as shown in Table 1. Specific fields correspond to the contents.

  As the value of Mode, a unidirectional (U, Unidirectional) mode, an optimistic (O, Optimistic) mode, and a reliability (R, Reliable) mode can be taken. As the value of State, the compression side is an initialization state (IR, Initiation and Refresh state), the first floor state (FO, First Order state), the second floor state (SO, Second Order state), and the decompression side is a context-free state (NC , No Context state), full context state (FC, Full Context state), and static context state (SC, Static Context state). StaticFiled mainly refers to fields that can distinguish service stream information, such as an IP source address, an IP target address, a UDP source port, and a UDP target port, and usually also refers to static context information. RefFiled mainly refers to reference value information of a key field including a network packet indicator number (IPID, Internet Protocol ID) field, a time stamp (TS, Time Stamp) field, a sequence number (SN, Sequence Number) field, and the like. Usually also referred to as dynamic context information.

  Step 402: After the user terminal is switched, the target base station learns the first ROHC context information to obtain second ROHC context information.

  Illustratively, after the target base station receives the first ROHC context information, it can learn the first ROHC context as shown in Table 1 in this embodiment. By learning information, it is possible to obtain second ROHC context information used when performing ROHC when interacting with the user terminal, and the second ROHC context information is obtained by the target base station and the user. A second service stream mark used for interaction with the terminal; a second data stream mark used for interaction between the target base station and the user terminal; and an interaction between the target base station and the user terminal. A second ROHC mode of operation used for A second compression context and decompression state used for interaction between the target base station and the user terminal; a second static context used for interaction between the target base station and the user terminal; The second dynamic context used for the interaction between the target base station and the user terminal can be included, and the specific description is described in detail in the above-described embodiment. Is omitted.

Illustratively, the step of the target base station learning the first ROHC context information to obtain the second ROHC context information includes a specific process:
The target base station selects the first ROHC operation mode as the second ROHC operation mode used for the interaction between the target base station and the user terminal;
The target base station selects the first compression side and decompression side states as the second compression side and decompression side states used for the interaction between itself and the user terminal;
The target base station uses the first static context as a second static context used for interaction between itself and the user terminal, and a second static context for distinguishing service streams And
The target base station is a second dynamic context used for an interaction between the first dynamic context and the user terminal, and a second dynamic context for performing compression and decompression processing. As context,
The target base station sets a second service stream mark used for an interaction between the target base station and the user terminal based on the first service stream mark and the state of the target base station itself;
The target base station sets a second data stream mark used for an interaction between the target base station and the user terminal based on the first data stream mark and the state of the target base station itself; Can be included.

Further, the target base station may set a second service stream mark used for an interaction between the target base station and the user terminal based on the first service stream mark and the state of the target base station itself. ,In particular,
The target base station determines a third service stream mark, which is a first service stream mark supported by the target base station, from the first service stream mark based on the state of the target base station itself. When,
The target base station obtains a fourth service stream mark that is supported by the target base station and is a service stream mark not included in the first service stream mark;
The target base station sets the third service stream mark as the second service stream mark used for the interaction between the target base station and the user terminal together with the fourth service stream mark. Can be included.

Correspondingly, a second service used by the target base station for interaction between the target base station and the user terminal based on the first data stream mark and the state of the target base station itself. Setting the stream mark
The target base station determines a third data stream mark, which is a first data stream mark supported by the target base station, from the first data stream mark based on the state of the target base station itself. And
The target base station obtains a fourth data stream mark that is supported by the target base station but is not included in the first data stream mark;
The target base station sets the third data stream mark together with the fourth data stream mark as a second data stream mark used for interaction between the target base station and the user terminal; Including.

  Note that the number of second data stream marks is determined by the number supported by the target base station itself, that is, even if the first data stream mark is supported by the target base station, If the number of data stream marks is different from the number supported by the target base station itself, it depends on the number supported by the target base station itself.

  Furthermore, the difference between the second ROHC context information and the first ROHC context information is determined by the relationship and difference between the target base station and the source base station. For example, in this embodiment, As shown in FIG. 1, when the target base station and the source base station are connected to the same S-GW, for the user terminal, the uplink / downlink data communication by the target base station is the uplink / downlink data communication by the source base station. Therefore, the difference between the first ROHC context information and the second ROHC context information is not large. On the other hand, when the target base station and the source base station are connected to different S-GWs, and when different S-GWs are managed by different MMEs, the second ROHC context information and the first ROHC It can be understood that the difference from the context information is relatively large and is not specifically limited in the embodiment of the present invention.

  It can be understood that the difference between the first ROHC context information and the second ROHC context information is merely a difference between the source base station and the target base station, and there is no change on the user terminal side. Therefore, after transmitting the switch confirmation information to the target base station after the user terminal is switched, the user terminal side does not need to change at all, and the second ROHC context information with the target base station Since header compression can be performed and context mutual learning and holding between the initial state and the target base station are not required again, the ROHC compression efficiency after the switching process is improved.

  In an embodiment of the present invention, a switching method based on the ROHC protocol is provided, and while the user terminal is switched, the source base station transmits the first ROHC context information to the target base station, so that the target base station By learning based on the ROHC context information, it is possible to obtain second ROHC context information used when performing ROHC when taking an interaction between the source base station and the user terminal. Even after switching between base stations, the compression efficiency can be kept high.

Referring to FIG. 5, the target base station 50 provided in the embodiment of the present invention is
A receiving unit 501 configured to receive first ROHC context information transmitted from a source base station;
A learning unit 502 configured to learn the first ROHC context information to obtain second ROHC context information.

  Illustratively, the receiving unit 501 can receive the first ROHC context information from the source base station at any time during the switching between the base stations. In this embodiment, the receiving unit 501 receives the first ROHC context information as the ROHC. The information may be received as synchronization information, but the embodiment of the present invention is not limited to this. Similarly, the specific format of the ROHC synchronization information may be individual signaling information, or it is added in the form of a custom field to the message transmitted from the source base station during switching, etc. However, the embodiment of the present invention is not limited to this at all. Specifically, the first ROHC context information is ROHC context information used when performing ROHC when the source base station and the user terminal interact.

  Further, the first ROHC context information includes a first service stream mark used for interaction between the source base station and the user terminal, and a first service stream mark used for interaction between the source base station and the user terminal. 1 data stream mark, a first ROHC operation mode used for interaction between the source base station and the user terminal, and a first compression side used for interaction between the source base station and the user terminal And a decompression state, a first static context used for interaction between the source base station and the user terminal, and a first dynamic context used for interaction between the source base station and the user terminal. A first service stream mark and The 1 data stream mark is a mark of the ROHC service stream and data stream that is supported when the source base station interacts with the user terminal, and the first ROHC operation mode includes the source base station and the user terminal. Are the operation modes in the case of performing ROHC when taking an interaction, and the first compression side and the decompression side are the compression modes in the case of performing ROHC when the source base station and the user terminal take an interaction. The first static context and the first dynamic context are a static context and a dynamic context necessary for ROHC when the source base station and the user terminal interact with each other. The corresponding contents are as shown in Table 1. Omitted.

  Further, the second ROHC context information is ROHC context information used when ROHC is performed when the target base station 50 and the user terminal interact with each other. The second ROHC context information is also the relationship between the target base station 50 and the user terminal. The second service stream mark used for interaction, the second data stream mark used for interaction between the target base station 50 and the user terminal, and the second service stream mark used for interaction between the target base station 50 and the user terminal. 2 ROHC operation modes, the second compression side and decompression state used for the interaction between the target base station 50 and the user terminal, and the second state used for the interaction between the target base station 50 and the user terminal. Static context and target Chikyoku can include 50 and the second dynamic context used to interact with the user terminal, specifically, because as described in the above embodiments, descriptions thereof will be omitted here.

Illustratively, the learning unit 502
First learning means configured to select the first ROHC operation mode as a second ROHC operation mode used for interaction between the target base station 50 itself and the user terminal;
A second configuration configured to select the first compression side and decompression state as the second compression side and decompression state used for the interaction between the target base station 50 itself and the user terminal; Learning means,
The first static context is a second static context used for interaction between the target base station 50 itself and the user terminal, and a second static context for distinguishing service streams A third learning means configured to:
The first dynamic context is a second dynamic context used for interaction between the target base station 50 itself and the user terminal, and is a second dynamic context for performing compression and decompression processing. A fourth learning means configured to:
Fifth learning configured to set a second service stream mark used for interaction between itself and the user terminal based on the first service stream mark and the state of the target base station 50 itself Means,
Sixth learning configured to set a second data stream mark used for interaction between the first data stream mark and the target base station itself based on the interaction between the first data stream mark and the user terminal. Means.

Furthermore, the fifth learning means is
A third service stream mark that is a first service stream mark supported by the target base station is determined from the first service stream mark based on the state of the target base station itself. A first determining sub-means;
First acquisition sub means configured to acquire a fourth service stream mark that is supported by the target base station but is not included in the first service stream mark;
A first learning sub, configured to make the third service stream mark together with the fourth service stream mark the second service stream mark used for interaction between the target base station 50 and the user terminal. Means,
Correspondingly, the sixth learning means is
A third data stream mark that is a first data stream mark supported by the target base station is determined from the first service stream mark based on the state of the target base station itself. A second decision sub-means;
A second acquisition sub-unit configured to acquire a fourth data stream mark that is supported by the target base station but is not included in the first data stream mark;
A second learning sub, configured to make the third data stream mark together with the fourth data stream mark the second data stream mark used for interaction between the target base station 50 and the user terminal; Means.

  Note that the number of second data stream marks is determined by the number supported by the target base station itself, that is, even if the first data stream mark is supported by the target base station, If the number of data stream marks is different from the number supported by the target base station itself, it depends on the number supported by the target base station itself.

  Note that the difference between the second ROHC context information and the first ROHC context information is determined by the relationship and difference between the target base station and the source base station. For example, in this embodiment, FIG. As shown in FIG. 4, when the target base station and the source base station are connected to the same S-GW, for the user terminal, uplink / downlink data communication by the target base station is abbreviated as uplink / downlink data communication by the source base station. Since they are similar, the difference between the first ROHC context information and the second ROHC context information is not large. On the other hand, when the target base station and the source base station are connected to different S-GWs, and when different S-GWs are managed by different MMEs, the second ROHC context information and the first ROHC It can be understood that the difference from the context information is relatively large and is not specifically limited in the embodiment of the present invention.

  It can be understood that the difference between the first ROHC context information and the second ROHC context information is merely a difference between the source base station and the target base station, and there is no change on the user terminal side. Therefore, after transmitting the switch confirmation information to the target base station after the user terminal is switched, the user terminal side does not need to change at all, and the second ROHC context information with the target base station Since header compression can be performed and context mutual learning and holding between the initial state and the target base station are not required again, the ROHC compression efficiency after the switching process is improved.

As shown in FIG. 6, the target base station 50
A first storage unit 503 configured to store the second ROHC context information may further be provided.

  Here, the first storage unit 503 can specifically include a demonstrable memory and / or a non-expellable memory. For example, non-performing memory may be read only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable PROM (EEPROM), flash memory and / or non-performing random. Including but not limited to access memory (NVRAM). Demonstrative memory includes random access memory (RAM), which can be external cache memory. For example, the RAM is static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDR SDRAM), enhanced SDRAM (ESDRAM), synchronous link DRAM (SLDRAM), And a plurality of formats such as, but not limited to, direct Rambus RAM (DRRAM). The first storage unit 503 includes, but is not limited to, any other type of memory as described above or where appropriate.

  In the embodiment of the present invention, while the target base station 50 is provided and the user terminal is switched, the target base station 50 receives the first ROHC context information transmitted from the source base station, and the first ROHC context information is received. By learning based on the second ROHC context information, the compression efficiency can be kept high even after the user terminal is switched between base stations.

FIG. 7 shows a source base station 70 provided in an embodiment of the present invention.
An acquisition unit 701 configured to acquire first ROHC context information;
A transmission unit 702 configured to transmit the first ROHC context information to a target base station.

  Illustratively, while the UE 11 switches from the source base station 70 to the target base station, the transmission unit 701 can transmit the first ROHC context information to the target base station at any time during switching between base stations. Thereby, the target base station learns the first ROHC context information and obtains second ROHC context information used for the interaction between the target base station and the user terminal. In the present embodiment, the first ROHC context information may be transmitted as the ROHC synchronization information, but the embodiment of the present invention is not limited to this. Similarly, the specific format of the ROHC synchronization information may be individual signaling information, or may be added in the form of a custom field to a message transmitted from the source base station 70 during switching. However, the embodiment of the present invention is not limited to this at all.

  Here, the first ROHC context information is ROHC context information used when performing ROHC when the source base station 70 and the user terminal take an interaction.

  Further, the first ROHC context information includes the first service stream mark used for the interaction between the source base station 70 and the user terminal, and the first data used for the interaction between the source base station 70 and the user terminal. State of stream mark, first ROHC operation mode used for interaction between source base station 70 and user terminal, and first compression side and decompression side used for interaction between source base station 70 and user terminal A first static context used for the interaction between the source base station 70 and the user terminal, and a first dynamic context used for the interaction between the source base station 70 and the user terminal, The service stream mark and the first data stream mark are respectively , ROHC service stream and data stream marks supported when the source base station 70 interacts with the user terminal, and the first ROHC operation mode is when the source base station 70 and the user terminal interact with each other. The first compression side and decompression side states are the compression side and decompression side states when performing the ROHC when the source base station 70 and the user terminal interact with each other. The first static context and the first dynamic context are a static context and a dynamic context required for ROHC when the source base station 70 and the user terminal interact with each other, As shown in Fig. 1, specific fields correspond to the corresponding contents. Description thereof will be omitted.

  As shown in FIG. 8, the source base station 70 may further include a second storage unit 703 configured to store the first ROHC context information, and the second storage unit 703 includes: Specifically, a demonstrable memory and / or a non-expellable memory can be included. For example, non-performing memory may be read only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable PROM (EEPROM), flash memory and / or non-performing random. Including but not limited to access memory (NVRAM). Demonstrative memory includes random access memory (RAM), which can be external cache memory. For example, the RAM is static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDR SDRAM), enhanced SDRAM (ESDRAM), synchronous link DRAM (SLDRAM), And a plurality of formats such as, but not limited to, direct Rambus RAM (DRRAM). The second storage unit 702 includes, but is not limited to, any other type of memory as described above or where appropriate.

  In the embodiment of the present invention, while the source base station 70 is provided and the user terminal is switched, the source base station 70 transmits the first ROHC context information to the target base station, so that the target base station can perform the first ROHC. The second ROHC context information can be obtained by learning based on the context information, and in this way, the compression efficiency can be kept high even after the user terminal is switched between base stations.

  Referring to FIG. 9, the switching system 90 based on the ROHC protocol provided in the embodiment of the present invention is described in the source base station 70 described in any of the above-described embodiments and in any of the above-described embodiments. Target base station 50.

  Illustratively, referring to FIG. 10, the system may further include a user terminal 100, which is a mobile phone, a cordless phone, a session establishment protocol (SIP) phone, a personal digital assistant ( PDA), portable devices having wireless connection capability, smartphones, tablets, and other devices, but are not limited here.

  In the embodiment of the present invention, a switching system 90 based on the ROHC protocol is provided, and while the user terminal 100 is switched, the source base station 70 transmits the first ROHC context information to the target base station 50, whereby the target base station 50 Can learn based on the first ROHC context information to obtain the second ROHC context information, so that the compression efficiency is kept high even after the user terminal 100 is switched between base stations. be able to.

  The receiving unit, the learning unit, the means included in the learning unit, and the sub means included in each of the above-described means provided in the embodiment of the present invention are all processed by the processor in the target base station. Both the acquisition unit and the transmission unit in the source base station provided in the embodiments of the present invention can be realized by a processor in the source base station. It may be realized by a logic circuit. In the course of a specific embodiment, the processor is a central processing unit (CPU), a microprocessor (MPU), a digital signal processor (DSP), or a field programmable gate array (FPGA). , Field Programmable Gate Array) or the like.

  In the embodiment of the present invention, the above-described switching method based on the ROHC protocol is realized in the form of software function means, and may be stored in a computer-readable storage medium if sold or used as an independent product. Good. Understood in this way, the technical solution of the embodiment of the present invention can be expressed in the form of a software product substantially, in other words, the part contributing to the prior art, and the computer software product is stored in a storage medium. It is stored and includes some commands that cause a computer device (which may be a personal computer, server, network device, etc.) to perform all or part of the method described in each embodiment of the present invention. The above-described storage medium includes various media capable of storing program codes, such as a U disk, a portable hard disk, a read only memory (ROM), a magnetic disk, or an optical disk. Thus, embodiments of the invention are not limited to any specific combination of hardware and software.

  Correspondingly, in an embodiment of the present invention, a computer-readable storage medium storing a computer-executable command is further provided, and the computer-executable command is provided in each of the above-described embodiments of the present invention. The switching method is based on the provided ROHC protocol.

  The above is only a specific embodiment of the present invention, and the scope of protection of the present invention is not limited thereto, and modifications and replacements that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention. All within the scope of protection of the present invention. Therefore, the protection scope of the present invention should be determined based on the protection scope of the described claims.

  In an embodiment of the present invention, the user terminal is switched so as to receive first ROHC context information transmitted from a source base station, learn the first ROHC context information, and obtain second ROHC context information. The source base station transmits 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. By doing so, it is possible to maintain high compression efficiency even after the user terminal is switched between base stations.

Claims (17)

A switching method based on a robust header compression ROHC protocol,
Receiving first ROHC context information transmitted from a source base station;
Learning the first ROHC context information to obtain second ROHC context information. The first ROHC context information includes a first service stream mark, a first data stream mark, a first ROHC operation mode, and a first compression used for interaction between the source base station and the user terminal. Side and decompressor state, a first static context, and a first dynamic context,
The second ROHC context information includes a second service stream mark used for interaction between a target base station and the user terminal, a second data stream mark, a second ROHC operation mode, and a second ROHC operation mode. The method of claim 1, comprising a compression and decompression state, a second static context, and a second dynamic context. The target base station learning the first ROHC context information to obtain second ROHC context information,
The target base station selects the first ROHC operation mode as a second ROHC operation mode used for interaction between the target base station and the user terminal;
The target base station selects the first compression side and decompression side states as the second compression side and decompression side states used for the interaction between itself and the user terminal;
The target base station uses the first static context as a second static context used for interaction between itself and the user terminal, and a second static context for distinguishing service streams And
The target base station is a second dynamic context used for an interaction between the first dynamic context and the user terminal, and a second dynamic context for performing compression and decompression processing. As context,
The target base station sets a second service stream mark used for an interaction between the target base station and the user terminal based on the first service stream mark and the state of the target base station itself;
The target base station sets a second data stream mark used for an interaction between the target base station and the user terminal based on the first data stream mark and the state of the target base station itself; The method of claim 2 comprising: Based on the first service stream mark and the state of the target base station itself, the target base station sets a second service stream mark used for interaction between the target base station and the user terminal,
The target base station determines a third service stream mark, which is a first service stream mark supported by the target base station, from the first service stream mark based on the state of the target base station itself. And
The target base station obtains a fourth service stream mark that is supported by the target base station and is a service stream mark not included in the first service stream mark;
The target base station sets the third service stream mark as the second service stream mark used for the interaction between the target base station and the user terminal together with the fourth service stream mark. Including
Correspondingly, a second service used by the target base station for interaction between the target base station and the user terminal based on the first data stream mark and the state of the target base station itself. Setting the stream mark
The target base station determines a third data stream mark, which is a first data stream mark supported by the target base station, from the first data stream mark based on the state of the target base station itself. And
The target base station obtains a fourth data stream mark that is supported by the target base station but is not included in the first data stream mark;
The target base station sets the third data stream mark together with the fourth data stream mark as a second data stream mark used for interaction between the target base station and the user terminal; The method of claim 3 comprising. A switching method based on a robust header compression ROHC protocol,
A method comprising the step of a source base station obtaining first ROHC context information and transmitting it to a target base station.   The first ROHC context information includes a first service stream mark, a first data stream mark, a first ROHC operation mode, and a first compression used for interaction between the source base station and the user terminal. 6. The method of claim 5, comprising a side and decompressor state, a first static context, and a first dynamic context. A receiving unit configured to receive first ROHC context information transmitted from a source base station;
A learning unit configured to learn the first ROHC context information to obtain second ROHC context information;
A target base station comprising: The first ROHC context information includes a first service stream mark, a first data stream mark, a first ROHC operation mode, and a first compression used for interaction between the source base station and the user terminal. Side and decompressor state, a first static context, and a first dynamic context,
The second ROHC context information includes a second service stream mark used for interaction between the target base station and the user terminal, a second data stream mark, a second ROHC operation mode, The target base station according to claim 7, comprising: a compression side and a decompression side state; a second static context; and a second dynamic context. The learning unit is
First learning means configured to select the first ROHC operation mode as a second ROHC operation mode used for interaction between the user terminal and the user terminal;
Second learning means configured to select a state of the first compression side and decompression side as a state of the second compression side and decompression side used for interaction between the user terminal and the user terminal;
The first static context is a second static context used for interaction between the user terminal and the user terminal, and is configured to be a second static context for distinguishing service streams. A third learning means,
The first dynamic context is a second dynamic context used for interaction between itself and the user terminal, and is configured to be a second dynamic context for performing compression and decompression processing. A fourth learning means,
Fifth learning configured to set a second service stream mark to be used for an interaction between the user terminal and the user terminal based on the first service stream mark and the state of the target base station itself Means,
Sixth learning configured to set a second data stream mark used for interaction between the first data stream mark and the target base station itself based on the interaction between the first data stream mark and the user terminal. And a target base station according to claim 8. The fifth learning means includes
A third service stream mark that is a first service stream mark supported by the target base station is determined from the first service stream mark based on the state of the target base station itself. A first determining sub-means;
First acquisition sub means configured to acquire a fourth service stream mark that is supported by the target base station but is not included in the first service stream mark;
A first learning sub configured to make the third service stream mark together with the fourth service stream mark a second service stream mark used for interaction between the target base station and the user terminal Means,
Correspondingly, the sixth learning means is
A third data stream mark that is a first data stream mark supported by the target base station is determined from the first service stream mark based on the state of the target base station itself. A second decision sub-means;
A second acquisition sub-unit configured to acquire a fourth data stream mark that is supported by the target base station but is not included in the first data stream mark;
A second learning sub configured to make the third data stream mark, together with the fourth data stream mark, a second data stream mark used for interaction between the target base station and the user terminal; And a target base station according to claim 9. An acquisition unit configured to acquire first ROHC context information;
A transmission unit configured to transmit the first ROHC context information to a target base station;
Source base station comprising.   The first ROHC context information includes a first service stream mark used for interaction between the source base station and a user terminal, a first data stream mark, a first ROHC operation mode, The source base station according to claim 11, comprising a compression side and a decompression side state, a first static context, and a first dynamic context. A switching system based on a robust header compression ROHC protocol having a source base station and a target base station,
The source base station is
An acquisition unit configured to acquire first ROHC context information;
A transmission unit configured to transmit the first ROHC context information to a target base station,
The target base station is
A receiving unit configured to receive first ROHC context information;
A learning unit configured to learn the first ROHC context information to obtain second ROHC context information. The first ROHC context information includes a first service stream mark, a first data stream mark, a first ROHC operation mode, and a first compression used for interaction between the source base station and the user terminal. Side and decompressor state, a first static context, and a first dynamic context,
The second ROHC context information includes a second service stream mark used for interaction between the target base station and the user terminal, a second data stream mark, a second ROHC operation mode, 14. The system of claim 13, comprising: a compression side and a decompression side state; a second static context; and a second dynamic context. The learning unit is
First learning means configured to select the first ROHC operation mode as a second ROHC operation mode used for interaction between the user terminal and the user terminal;
Second learning means configured to select a state of the first compression side and decompression side as a state of the second compression side and decompression side used for interaction between the user terminal and the user terminal;
The first static context is a second static context used for interaction between the user terminal and the user terminal, and is configured to be a second static context for distinguishing service streams. A third learning means,
The first dynamic context is a second dynamic context used for interaction between itself and the user terminal, and is configured to be a second dynamic context for performing compression and decompression processing. A fourth learning means,
Based on the first service stream mark, the first data stream mark, and the state of the target base station itself, a second service stream mark used for interaction between the user terminal and the user terminal is set. A fifth learning means comprising:
Based on the first service stream mark, the first data stream mark, and the state of the target base station itself, a second data stream mark used for interaction between the user terminal and the user terminal is set. The 6th learning means comprised by these. The system of Claim 13. The fifth learning means includes
A third service stream mark that is a first service stream mark supported by the target base station is determined from the first service stream mark based on the state of the target base station itself. A first determining sub-means;
First acquisition sub means configured to acquire a fourth service stream mark that is supported by the target base station but is not included in the first service stream mark;
A first learning sub configured to make the third service stream mark together with the fourth service stream mark a second service stream mark used for interaction between the target base station and the user terminal Means,
Correspondingly, the sixth learning means is
A third data stream mark that is a first data stream mark supported by the target base station is determined from the first service stream mark based on the state of the target base station itself. A second decision sub-means;
A second acquisition sub-unit configured to acquire a fourth data stream mark that is supported by the target base station but is not included in the first data stream mark;
A second learning sub configured to make the third data stream mark, together with the fourth data stream mark, a second data stream mark used for interaction between the target base station and the user terminal; 16. The system of claim 15, comprising means. A computer-readable storage medium storing computer-executable commands,
The computer-executable command is for executing a switching method based on the robust header compression ROHC protocol according to any one of claims 1 to 4, and / or the computer-executable command is A storage medium for executing the switching method based on the robust header compression ROHC protocol according to claim 5 or 6.

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