JP2011151761A - Mobile communication method and radio base station - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To resolve troubles in a hand-over process and a reconnection process when there are base stations provided with RRC protocol functions each having a different release number. <P>SOLUTION: A mobile communication method has: a step of making the radio base station eNB#1 notify a radio base station eNB#2 of a release number of an RRC protocol function used in a radio base station eNB#1; and a step of making the radio base station eNB#2 notify the radio base station eNB#1 of a release number of an RRC protocol function used in the radio base station eNB#1, in a procedure for setting an X2 connection between the radio base station eNB#1 and the radio base station eNB#2. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a mobile communication method and a radio base station.

  At present, in 3GPP, work for formulating a further extension standard of the LTE (Long Term Evolution) system is in progress.

  In 3GPP, the “UTRA (Universal Terrestrial Radio Access)” method, the “UTRAN (Universal Terrestrial Radio Access Network)” method, and the LTE method “Evolved UTRA (E-U)” are used. An extension standard is regularly formulated, and the version number of the extension function is managed by “release number”.

  Such LTE system is defined for the first time in “Release 8”, and the work of formulating an extended standard in “Release 9” is currently in progress.

3GPP TS 36.300 (V9.1.0), “Evolved Universal Terrestrial Radio Access (E-UTRA) and Evolved Universal Terrestrial Radio Network 9 H 3GPP TS 36.413 (V9.1.0), “Evolved Universal Terrestrial Radio Access Network (E-UTRAN); S1 application protocol (S1AP)”, December 2009 3GPP TS36.423 (V9.1.0), “Evolved Universal Terrestrial Radio Access Network (E-UTRAN); X2 application protocol (X2AP)”, December 2009 3GPP TS36.331 (V9.0.0), “Radio Resource Control (RRC); Protocol specification”, September 2009

  However, as shown in FIG. 15, an LTE mobile station UE equipped with a “Radio Resource Control (RRC) protocol function” defined in “Release 9” has an RRC protocol function defined in “Release 9”. When handover is performed from the installed LTE radio base station eNB # 1 to the LTE radio base station eNB # 2 equipped with the RRC protocol function defined in “Release 8”, the following problems occur. .

  First, “Handover” notified by “(X2 / S1) HANDOVER REQUEST” transmitted from the radio base station eNB # 1 to the radio base station eNB # 2 via the switching center MME on the X2 interface or the S1 interface. As shown in FIG. 16, the “Preparation Information” is, for example, a wireless function mounted on the mobile station UE such as “ue-RadioAccessCapabilityInfo” or “AS-Config”, or between the mobile station UE and the radio base station eNB # 1. Configuration information used for transmitting control signals (C-plane) and user data (U-plane) between the base station eNB # 2 and the radio base station eNB # 2 is defined by “Release 9”. RRC protocol extensions I cannot understand the setting information.

  Second, the LTE mobile station UE equipped with the RRC protocol function defined in “Release 9” performs handover to the radio base station eNB # 2 equipped with the RRC protocol function defined in “Release 8”. When performing, it is necessary to invalidate the extended function prescribed | regulated by "Release 9" in the mobile station UE, but the opportunity and method to invalidate are not prescribed | regulated.

  In addition, after the mobile station UE detects “RLF (Radio Link Failure)” in the cell under the LTE radio base station eNB # 1 equipped with the RRC protocol function defined in “Release 9”, “Release 8” In the case where the reconnection process is performed for the cell under the LTE radio base station eNB # 2 equipped with the RRC protocol function specified in “”, the extended function specified in “Release 9” is also provided in the mobile station UE. Although it is necessary to invalidate, the trigger and method to invalidate are not specified.

  Therefore, the present invention has been made in view of the above-described problems, and can solve problems in handover processing, reconnection processing, and the like when radio base stations equipped with RRC protocol functions with different release numbers coexist. An object of the present invention is to provide a mobile communication method and a radio base station.

  A first feature of the present invention is a mobile communication method, wherein in the procedure for setting up a connection between a first radio base station and a second radio base station, the first radio base station is configured to transmit the second radio base station. Informing a base station of a release number of a predetermined protocol function used in the first radio base station; and the second radio base station sends the second radio base station to the second radio base station And a step of notifying a release number of the predetermined protocol function used in the radio base station.

  A second feature of the present invention is a mobile communication method, in which, when a parameter set in the first radio base station is updated, the first radio base station communicates with the first radio base station. It is necessary to have a step of notifying the release number of the predetermined protocol function used in the first radio base station to the second radio base station to which a connection is established.

  A third feature of the present invention is a mobile communication method, wherein when the first radio base station receives identification information of the second radio base station from the mobile station, the second radio base station The gist is to have a step of obtaining a release number of a predetermined protocol function used in the second radio base station from a station.

  According to a fourth aspect of the present invention, there is provided a wireless base station, wherein a predetermined used by the wireless base station is used with respect to the surrounding wireless base station in a procedure for setting a connection with the surrounding wireless base station. A transmitter configured to notify a release number of a protocol function, and configured to obtain a release number of the predetermined protocol function used in the peripheral radio base station from the peripheral radio base station And a receiver.

  A fifth feature of the present invention is a wireless base station, and when a parameter set in the wireless base station is updated, a peripheral wireless base in which a connection is established with the wireless base station The gist of the present invention is to provide a transmitter configured to notify a station of a release number of a predetermined protocol function used in the radio base station.

  A sixth feature of the present invention is a radio base station, and when receiving identification information of a neighboring radio base station from a mobile station, the neighboring radio base station The gist of the invention is to include a receiving unit configured to obtain a release number of a predetermined protocol function being used.

  As described above, according to the present invention, a mobile communication method and a radio that can eliminate problems in handover processing, reconnection processing, and the like when radio base stations equipped with RRC protocol functions with different release numbers coexist. A base station can be provided.

1 is an overall configuration diagram of a mobile communication system according to a first embodiment of the present invention. FIG. 3 is a functional block diagram of a radio base station according to the first embodiment of the present invention. It is a figure which shows an example of the information element in the "X2 Setup Request message" used with the mobile communication system which concerns on the 1st Embodiment of this invention. It is a figure which shows an example of the information element in the "Served Cell Information message" used with the mobile communication system which concerns on the 1st Embodiment of this invention. It is a figure which shows an example of the information element in the "eNB Configuration Update message" used with the mobile communication system which concerns on the 1st Embodiment of this invention. It is a figure which shows an example of the information element in the "X2 Setup Response message" used with the mobile communication system which concerns on the 1st Embodiment of this invention. It is a figure for demonstrating the operation | movement which resets "UE Configuration" of the mobile station UE in the mobile communication system which concerns on the 1st Embodiment of this invention. It is a figure for demonstrating the operation | movement which resets "UE Configuration" of the mobile station UE in the mobile communication system which concerns on the 1st Embodiment of this invention. It is a figure for demonstrating the mobile communication system which concerns on the example 1 of a change of this invention. It is a figure which shows an example of the information element in the "eNB / MME Configuration Transfer message" used with the mobile communication system which concerns on the modification 1 of this invention. It is a figure for demonstrating the mobile communication system which concerns on the modification 2 of this invention. It is a figure which shows an example of the information element in the "X2 Setup Request message" used with the mobile communication system which concerns on the modification 3 of this invention. It is a figure which shows an example of the information element in the "X2 Setup Response message" used with the mobile communication system which concerns on the modification 3 of this invention. It is a figure which shows an example of the information element in the "eNB Configuration Update message" used with the mobile communication system which concerns on the modification 3 of this invention. It is a figure for demonstrating the problem of the conventional mobile communication system. It is a figure for demonstrating the problem of the conventional mobile communication system.

(Mobile communication system according to the first embodiment of the present invention)
A mobile communication system according to a first embodiment of the present invention will be described with reference to FIG. 1 to FIG.

  As shown in FIG. 1, the mobile communication system according to the present embodiment is equipped with a switching center MME (Mobility Management Entity) # 1, a switching center MME # 2, and an RRC protocol function defined by “Release 10”. LTE wireless base station eNB # 1, gateway device HeNB-GW (Home eNB Gateway), LTE wireless base station eNB # 2 equipped with the RRC protocol function defined in “Release 9”, “Release” LTE radio base station eNB # 3 equipped with the RRC protocol function defined in “8”, LTE radio base station eNB # 10 equipped with the RRC protocol function defined in “Release 9”, “Release” 10 ”RRC protocol An LTE radio base station HeNB # 1 equipped with an RRC protocol function, and an LTE radio base station HeNB # 2 equipped with an RRC protocol function defined in “Release 9”.

  Here, the pool area of the exchange MME # 1 and the pool area of the exchange MME # 2 are different, and the exchange MME # 1 includes the gateway device HeNB-GW, the radio base station eNB # 1, and the radio base station eNB. # 2, radio base station eNB # 3, radio base station HeNB # 1, etc. are connected, and radio base station HeNB # 2 etc. are connected to gateway apparatus HeNB-GW, and exchange station MME # 2 is connected to Is connected to the radio base station eNB # 10 or the like.

  In the example of FIG. 1, X2 connections are set between the radio base station eNB # 1 and the radio base station eNB # 2 and between the radio base station eNB # 2 and the radio base station eNB # 3. It is comprised so that.

  That is, between the radio base station eNB # 1 and the radio base station eNB # 2, and between the radio base station eNB # 2 and the radio base station eNB # 3, the “X2 connection setup (X2 setup) procedure” The “radio base station configuration update (eNB configuration update) procedure” is configured to be performed.

  On the other hand, in the example of FIG. 1, between the radio base station eNB # 10 and the radio base station eNB # 1, between the radio base station eNB # 3 and the radio base station HeNB # 1, and between the radio base station HeNB # 1. And the radio base station HeNB # 2 are configured not to set the X2 connection.

  That is, between the radio base station eNB # 10 and the radio base station eNB # 1, between the radio base station eNB # 3 and the radio base station HeNB # 1, and between the radio base station HeNB # 1 and the radio base station HeNB #. 2 is configured such that the “X2 connection setup (X2 setup) procedure” and the “radio base station configuration update (eNB configuration update) procedure” are not performed.

  Since the configurations of the radio base stations eNB # 1 to # 3 are basically the same, hereinafter, they are collectively referred to as “radio base station eNB”.

  As illustrated in FIG. 2, the radio base station eNB includes an NRT storage unit 11, a transmission unit 12, and a reception unit 13.

  The NRT storage unit 11 is configured to store an “NRT (Neighbor Relation Table)” in which information related to neighboring radio base stations is registered.

  For example, the information related to the peripheral radio base station includes the release number of the LTE system supported by the peripheral radio base station, that is, the release number of the RRC (Radio Resource Control) protocol function installed in the peripheral radio base station (for example, , Release 8 / Release 9 / Release 10).

  In the procedure of setting the X2 connection with the peripheral radio base station, that is, the “X2 setup procedure” performed with the peripheral radio base station, the transmitter 12 transmits the radio base station to the peripheral radio base station. It is configured to notify a release number (for example, Release 8 / Release 9 / Release 10) of the RRC protocol function used in the eNB.

  Alternatively, when the parameter set in the radio base station eNB is updated, that is, in the “eNB configuration update procedure”, the transmission unit 12 is used in the radio base station eNB with respect to the neighboring radio base stations. The RRC protocol function release number (for example, Release 8 / Release 9 / Release 10) may be notified.

  For example, as illustrated in FIG. 3, the transmission unit 12 is adjacent to the radio base station eNB with the information element “RRC Protocol Release” regarding “Neighbor Information” in the “X2 Setup Request message” to be transmitted to the neighboring radio base stations. The RRC protocol function release number used in the radio base station eNB may be set.

  Further, as shown in FIG. 4, the transmission unit 12 uses the RRC protocol function used in the radio base station eNB in the information element “RRC Protocol Release” in the “Served Cell Information message” to be transmitted to the neighboring radio base stations. The release number may be set.

  Alternatively, as illustrated in FIG. 5, the transmission unit 12 uses the information element “RRC Protocol Release” in the “eNB Configuration Update message” to be transmitted to the neighboring radio base stations, and the radio base station eNB and the adjacent radio base station eNB. It may be configured to set the release number of the RRC protocol function being used.

  In the procedure for setting the X2 connection with the peripheral radio base station, that is, the “X2 setup procedure” performed with the peripheral radio base station, the reception unit 13 performs the operation from the peripheral radio base station to the peripheral radio base station. It is configured to obtain a release number (for example, Release 8 / Release 9 / Release 10) of the RRC protocol function being used.

  For example, as illustrated in FIG. 6, the reception unit 13 uses the RRC protocol function used in the neighboring radio base station from the information element “RRC Protocol Release” in the “X2 Setup Response message” received from the neighboring radio base station. May be configured to obtain a release number.

  In addition, when the parameter set in the radio base station eNB # 1 is updated, that is, in the “eNB configuration update procedure”, the receiving unit 13 is used by the neighboring radio base station from the neighboring radio base station. The RRC protocol function release number (eg, Release 8 / Release 9 / Release 10) may be acquired.

  For example, as illustrated in FIG. 7, the control unit 14 is configured such that the mobile station UE has an RRC defined by “Release 9” adjacent to a radio base station having an RRC protocol function defined by “Release 8”. Among the settings related to the RRC protocol function installed in the mobile station UE when handover is performed to a cell under the radio base station equipped with the protocol function, “Release 8” or later (for example, Release 9 / Release 10 / Release 11) Etc.) is invalidated.

  In addition, for example, as illustrated in FIG. 8, when it is determined that the control unit 14 performs handover from a cell under the radio base station eNB of the mobile station UE to a cell under the surrounding radio base station, the mobile station UE Of the settings related to the RRC protocol function installed in the UE, the settings specified in “Release 8” and later (for example, Release 9 / Release 10 / Release 11 etc.) may be invalidated. .

  Specifically, as shown in FIG. 8, in step S101, the mobile station UE sends a “Measurement Report” to the radio base station eNB (radio base station eNB # 1 in the example of FIG. 8). In step S102, the radio base station eNB determines, based on the “Measurement Report”, from the cell under the radio base station eNB of the mobile station UE (the radio base station in the example of FIG. 8). eNB # 2) It is determined to perform handover to a subordinate cell.

  After that, the radio base station eNB transmits “HANDOVER REQUEST” to the handover destination radio base station in step S103A, or after receiving “HANDOVER REQUEST ACKNOWLEDGE” from the handover destination radio base station, in step S103B By performing the “RRC Reconfiguration procedure” with the mobile station UE, among the settings related to the RRC protocol function installed in the mobile station UE, “Release 8” or later (for example, Release 9 / Release 10 / Release) 11 etc.) is invalidated.

  7 and 8, the release number of the RRC protocol function used in the radio base station eNB is “Release 9”, and the release number of the RRC protocol function used in the neighboring radio base station is It is assumed that “Release 8” is older than “Release 9”.

  According to the mobile communication system according to the first embodiment of the present invention, the RRC protocol in which the radio base station eNB is used in the neighboring radio base stations before the handover process and the reconnection process related to the mobile station UE are performed. Since the release number of the function can be known, the RRC protocol used between the handover source radio base station and the handover destination radio base station and between the reconnection source radio base station and the reconnection destination radio base station By making the function release numbers the same, it is possible to eliminate problems in handover processing, reconnection processing, and the like.

(Modification 1)
With reference to FIG.9 and FIG.10, the example 1 of a change of the mobile communication system which concerns on the above-mentioned 1st Embodiment is demonstrated. Hereinafter, the mobile communication system according to the first modification will be described by focusing on differences from the mobile communication system according to the first embodiment described above.

  When the transmitting unit 12 of the radio base station eNB receives the identification information (eNB-ID) of the neighboring radio base station from the mobile station UE, the radio base station eNB transmits the radio base to the neighboring radio base station via the exchange MME. It is configured to notify a release number (for example, Release 8 / Release 9 / Release 10) of the RRC protocol function used in the station eNB.

  In addition, when receiving the identification information (eNB-ID) of the neighboring radio base station from the mobile station UE, the receiving unit 13 of the radio base station eNB transmits the neighboring radio base station from the neighboring radio base station via the exchange MME. The RRC protocol function release number used in the base station (for example, Release 8 / Release 9 / Release 10) is acquired.

  Hereinafter, the operation of the mobile communication system according to the first modification will be described with reference to FIG. 9 and FIG.

  As illustrated in FIG. 9, in step S201, for example, using “ANR (Automatic Neighbor Relation)”, the mobile station UE reads broadcast information of the radio base station eNB # 2 according to an instruction from the radio base station eNB # 1. Then, “ECGI (Enhanced Cell Global Identification)” and “TAC (Tracking Area Code)” related to the radio base station eNB # 2 are transmitted to the radio base station eNB # 1.

  In step S202, when the radio base station eNB # 1 does not register the release number of the RRC protocol function used in the radio base station eNB # 2 in the NRT storage unit 11, the radio base station eNB # 1 “ENB Configuration Transfer” including “Tracking Area ID (TAI)” derived from “eNB-ID” and “TAC” of radio base station eNB # 2 derived from “E-CGI” of radio base station eNB # 2 described above ".

  Here, the radio base station eNB # 1 may notify the release number of the RRC protocol function used in the radio base station eNB # 1 to the exchange MME by “eNB Configuration Transfer”.

  In step S203, the switching center MME transmits “MME Configuration Transfer” including “eNB-ID” and “TAI” of the radio base station eNB # 2 to the radio base station eNB # 2.

  In step S204, the radio base station eNB # 2 transmits “eNB Configuration Transfer” including the release number of the RRC protocol function used in the radio base station eNB # 2 to the exchange MME.

  Here, as shown in FIG. 10, the information element “SON Information Reply” in the information element “SON Information Reply” in the information element “SON Information Transfer” in the information element “SON Configuration Transfer” in the “eNB Configuration Transfer”. The release number of the RRC protocol function used in the radio base station eNB # 2 may be set in “Info”.

  In addition, when the release number of the RRC protocol function used in the radio base station eNB # 1 is included in the received “MME Configuration Transfer”, the radio base station eNB # 2 The release number of the RRC protocol function being used is registered in the NRT storage unit 11.

  In step S205, the switching center MME transmits to the radio base station eNB # 1 “MME Configuration Transfer” including the release number of the RRC protocol function used in the radio base station eNB # 2.

  Here, as shown in FIG. 10, the information element “SON Information Reply” in the information element “SON Information Reply” in the information element “SON Information Transfer” in the information element “SON Configuration Transfer” in the “MME Configuration Transfer”. The release number of the RRC protocol function used in the radio base station eNB # 2 may be set in “Info”.

  The radio base station eNB # 1 acquires the release number of the RRC protocol function used in the radio base station eNB # 2 from the received “MME Configuration Transfer”, and registers it in the NRT storage unit 11.

  Note that the operation of FIG. 9 is not only between the radio base station eNB # 1 and the radio base station eNB # 2 and between the radio base station eNB # 2 and the radio base station eNB # 3, Between eNB # 10 and radio base station eNB # 1, between radio base station eNB # 3 and radio base station HeNB # 1, and between radio base station HeNB # 1 and radio base station HeNB # 2. Is also applicable.

(Modification 2)
With reference to FIG. 11, the modification 2 of the mobile communication system which concerns on the above-mentioned 1st Embodiment is demonstrated. Hereinafter, the mobile communication system according to the second modification will be described by focusing on differences from the mobile communication system according to the first embodiment described above.

  Hereinafter, the operation of the mobile communication system according to the second modification will be described with reference to FIG.

  As illustrated in FIG. 11, when the radio base station eNB # 1 changes the release number of the RRC protocol function to be used from “Release 9” to “Release 8” in step S301, the change is made to the exchange MME. “ENB Configuration Transfer” including the release number “Release 8” of the RRC protocol function used in the subsequent radio base station eNB # 1 is transmitted, and the exchange MME changes the radio base station eNB # 2 “MME Configuration Transfer” including the release number “Release 8” of the RRC protocol function used in the radio base station eNB # 1 of the mobile station is transmitted.

  The radio base station eNB # 2 acquires the release number “Release 8” of the RRC protocol function used in the radio base station eNB # 1 after change from the received “MME Configuration Transfer”, and stores it in the NRT storage unit 11 sign up.

  In step S302, the radio base station eNB # 2 transmits “eNB Configuration Transfer” including the release number “Release 9” of the RRC protocol function used in the radio base station eNB # 2 to the switching center MME. The exchange MME transmits “MME Configuration Transfer” including the release number “Release 9” of the RRC protocol function used in the radio base station eNB # 2 to the radio base station eNB # 1.

  The radio base station eNB # 1 acquires the release number “Release 9” of the RRC protocol function used in the radio base station eNB # 2 from the received “MME Configuration Transfer”, and registers it in the NRT storage unit 11 .

(Modification 3)
With reference to FIG. 12 to FIG. 14, Modification 3 of the mobile communication system according to the first embodiment described above will be described. Hereinafter, the mobile communication system according to the third modification will be described by focusing on differences from the mobile communication system according to the first embodiment described above.

  In the mobile communication system according to the first embodiment described above, in the procedure for setting up the X2 connection between the radio base station eNB # 1 and the radio base station eNB # 2, that is, in the “X2 setup procedure”, the radio base station The transmission unit 12 of the station eNB # 1 transmits to the radio base station eNB # 2, for example, the information element “RRC Protocol Release” regarding the “Neighbor Information” in the “X2 Setup Request message” illustrated in FIG. The RRC protocol function release number (for example, Release 8 / Release 9 / Release 10) used in the cell under the control of the radio base station eNB # 1 adjacent to the station eNB is notified.

  On the other hand, in the mobile communication system according to the third modification, in the procedure for setting the X2 connection between the radio base station eNB # 1 and the radio base station eNB # 2, that is, in the “X2 setup procedure”, The transmission unit 12 of the radio base station eNB # 1 sends the radio base station eNB # 2 to the radio base station eNB # 2 by, for example, the information element “RRC Protocol Release” in the “X2 Setup Request message” illustrated in FIG. 1 is configured to notify a release number (for example, Release 8 / Release 9 / Release 10) of an RRC protocol function commonly used in cells under the radio base station eNB adjacent to 1.

  Further, in the mobile communication system according to the first embodiment described above, in the procedure of setting the X2 connection between the radio base station eNB # 1 and the radio base station eNB # 2, that is, in the “X2 setup procedure”, The receiving unit 12 of the radio base station eNB # 1 receives the radio base station eNB # 2 from the radio base station eNB # 2 based on the information element “RRC Protocol Release” regarding the “Neighbor Information” in the “X2 Setup Response message” illustrated in FIG. The RRC protocol function release number (for example, Release 8 / Release 9 / Release 10) used in a cell under the control of the radio base station eNB adjacent to the station eNB # 2 is acquired.

  On the other hand, in the mobile communication system according to the third modification, in the procedure for setting the X2 connection between the radio base station eNB # 1 and the radio base station eNB # 2, that is, in the “X2 setup procedure”, The receiving unit 12 of the radio base station eNB # 1 transmits the information from the radio base station eNB # 2 to the radio base station eNB # 2 by, for example, the information element “RRC Protocol Release” in the “X2 Setup Response message” illustrated in FIG. An RRC protocol function release number (for example, Release 8 / Release 9 / Release 10) commonly used in cells under the adjacent radio base station eNB is configured to be acquired.

  Further, in the mobile communication system according to the first embodiment described above, the transmitter 12 of the radio base station eNB # 1 updates the parameter set in the radio base station eNB # 1, that is, “eNB In the configuration update procedure, for the radio base station eNB # 2, the radio base station adjacent to the radio base station eNB # 1 by the information element “RRC Protocol Release” related to “Neighbor Information” in the “eNB Configuration Update message” It is configured to notify each of the release numbers (for example, Release 8 / Release 9 / Release 10) of the RRC protocol function used in the cells under the eNB.

  On the other hand, in the mobile communication system according to the third modification example, the transmission unit 12 of the radio base station eNB # 1 updates the parameter set in the radio base station eNB # 1, that is, “eNB In the “configuration update procedure”, the information element “RRC Protocol Release” in the “eNB Configuration Update message” is transmitted to the radio base station eNB # 2 in a cell subordinate to the radio base station eNB # 1. It is configured to notify the release number (for example, Release 8 / Release 9 / Release 10) of the commonly used RRC protocol function.

  The characteristics of the present embodiment described above may be expressed as follows.

  A first feature of the present embodiment is a mobile communication method, in which an X2 connection is established between a radio base station eNB # 1 (first radio base station) and a radio base station eNB # 2 (second radio base station). In the procedure of setting (connection), the radio base station eNB # 1 makes a release number of the RRC protocol function used in the radio base station eNB # 1 (for example, Release 8 / Release 9 (Release 9 / Release 10) and the radio base station eNB # 2 to the radio base station eNB # 1, the release number of the RRC protocol function used in the radio base station eNB # 2 (for example, And Step B for notifying Release 8 / Release 9 / Release 10).

  In the first feature of the present embodiment, in step A, the radio base station eNB # 1 determines that the RRC protocol function release number (for example, Release) used in the radio base station eNB adjacent to the radio base station eNB # 1. 8 / Release 9 / Release 10) may be notified.

  In the first feature of the present embodiment, in step A, the radio base station eNB # 1 determines that the release number of the RRC protocol function used in a cell under the radio base station eNB adjacent to the radio base station eNB # 1 ( For example, each of Release 8 / Release 9 / Release 10) may be notified.

  In the first feature of the present embodiment, in step A, the radio base station eNB # 1 releases the RRC protocol function that is commonly used in cells under the radio base station eNB adjacent to the radio base station eNB # 1. A number (for example, Release 8 / Release 9 / Release 10) may be notified.

  In the first feature of the present embodiment, in step B, the radio base station eNB # 2 determines that the release number of the RRC protocol function used by the radio base station eNB adjacent to the radio base station eNB # 2 (for example, Release) 8 / Release 9 / Release 10) may be notified.

  In the first feature of the present embodiment, in step B, the radio base station eNB # 2 releases the RRC protocol function release number (used in a cell under the radio base station eNB adjacent to the radio base station eNB # 2 ( For example, each of Release 8 / Release 9 / Release 10) may be notified.

  In the first feature of the present embodiment, in step B, the radio base station eNB # 2 releases the RRC protocol function that is commonly used in cells subordinate to the radio base station eNB adjacent to the radio base station eNB # 2. A number (for example, Release 8 / Release 9 / Release 10) may be notified.

  A second feature of the present embodiment is a mobile communication method, and when the parameters set in the radio base station eNB # 1 are updated, the radio base station eNB # 1 and the radio base station eNB # 2 The release number of the RRC protocol function used in the radio base station eNB # 1 (for example, Release 8 / Release 9 / Release 10) for the radio base station eNB # 2 in which the X2 connection is set between The gist is to have a notification step.

  In the second feature of the present embodiment, in the above-described steps, the radio base station eNB # 1 sends a release number of the RRC protocol function used by the radio base station eNB # 2 from the radio base station eNB # 2 (for example, Release 8 / Release 9 / Release 10) may be acquired.

  In the second feature of the present embodiment, in the above-described steps, the radio base station eNB # 1 is used by the radio base station eNB adjacent to the radio base station eNB # 1 with respect to the radio base station eNB # 2. The release number of the RRC protocol function (for example, Release 8 / Release 9 / Release 10) may be notified.

  In the second feature of the present embodiment, in the above-described steps, the radio base station eNB # 1 is used in a cell under the radio base station eNB adjacent to the radio base station eNB # 1 with respect to the radio base station eNB # 2. Each of the released RRC protocol function release numbers (eg, Release 8 / Release 9 / Release 10) may be notified.

  In the second feature of the present embodiment, in the above-described steps, the radio base station eNB # 1 is common to the radio base station eNB # 2 in cells under the radio base station eNB adjacent to the radio base station eNB # 1. The release number (for example, Release 8 / Release 9 / Release 10) of the RRC protocol function used in the above may be notified.

  A third feature of the present embodiment is a mobile communication method, in which the radio base station eNB # 1 receives the identification information (eNB-ID) of the radio base station eNB # 2 from the mobile station UE. Obtaining a release number (for example, Release 8 / Release 9 / Release 10) of the RRC protocol function used in the radio base station eNB # 2 from the radio base station eNB # 2 via the MME. The gist.

  In the third feature of the present embodiment, in the above-described steps, the radio base station eNB # 1 releases the RRC protocol function release number used by the radio base station eNB # 1 with respect to the radio base station eNB # 2. May be notified.

  In the first to third features of the present embodiment, the release number of the RRC protocol function used in the radio base station eNB # 1 is “Release 9 (first release number)”, and the radio base station eNB # 2 Exists in the vicinity of the radio base station eNB # 1, and the release number of the RRC protocol function used in the radio base station eNB # 2 is “Release 8 (second release number)” older than “Release 9” If the mobile station UE is handed over to a cell under the radio base station eNB # 1, the “Release 8” or later (for example, among the settings related to the RRC protocol function installed in the mobile station UE) (Release 9 / Release 10 / Release 11 etc.) Good.

  In the first to third features of the present embodiment, the release number of the RRC protocol function used in the radio base station eNB # 1 is “Release 9”, and the RRC used in the radio base station eNB # 2 When the release number of the protocol function is “Release 8” older than “Release 9”, and the handover from the cell under the radio base station eNB # 1 of the mobile station UE to the cell under the radio base station eNB # 2 Among the settings related to the RRC protocol function installed in the mobile station UE, for example, the settings specified in “Release 8” or later (for example, Release 9 / Release 10 / Release 11 etc.) May be configured to be invalidated.

  The fourth feature of the present embodiment is the radio base station eNB # 1, and in the procedure for setting the X2 connection with the neighboring radio base station eNB # 2, the neighboring radio base station eNB # 2 A transmission unit 12 configured to notify a release number (for example, Release 8 / Release 9 / Release 10) of the RRC protocol function used in the radio base station eNB # 1, and a neighboring radio base station eNB # 2 And a receiving unit 13 configured to obtain a release number (for example, Release 8 / Release 9 / Release 10) of the RRC protocol function used in the neighboring radio base station eNB # 2. The gist.

  In the fourth feature of the present embodiment, the transmission unit 12 releases the RRC protocol function release number used in the radio base station eNB adjacent to the radio base station eNB # 1 with respect to the neighboring radio base station eNB # 2. (For example, Release 8 / Release 9 / Release 10) may be notified.

  In the fourth feature of the present embodiment, the transmitter 12 uses the RRC protocol function used in the cell under the radio base station eNB adjacent to the radio base station eNB # 1 with respect to the neighboring radio base station eNB # 2. Each release number (for example, Release 8 / Release 9 / Release 10) may be notified.

  In the fourth feature of the present embodiment, the transmission unit 12 uses the RRC commonly used in the cells under the radio base station eNB adjacent to the radio base station eNB # 1 with respect to the neighboring radio base station eNB # 2. It may be configured to notify the release number of the protocol function (for example, Release 8 / Release 9 / Release 10).

  In the fourth feature of the present embodiment, the receiving unit 13 receives a release number (RRC protocol function release number (used by a radio base station eNB adjacent to the neighboring radio base station eNB # 2) from the neighboring radio base station eNB # 2. For example, Release 8 / Release 9 / Release 10) may be acquired.

  In the fourth feature of the present embodiment, the reception unit 13 has an RRC protocol function used in a cell under the control of the radio base station eNB adjacent to the peripheral radio base station eNB # 2 from the peripheral radio base station eNB # 2. It may be configured to acquire each of the release numbers (for example, Release 8 / Release 9 / Release 10).

  In the fourth feature of the present embodiment, the reception unit 13 uses the RRC protocol that is commonly used from the neighboring radio base station eNB # 2 by the cells under the radio base station eNB adjacent to the neighboring radio base station eNB # 2. The release number of the function (for example, Release 8 / Release 9 / Release 10) may be acquired.

  The fifth feature of the present embodiment is the radio base station eNB # 1, and when a parameter set in the radio base station eNB # 1 is updated, an X2 connection is established with the radio base station eNB # 1. Is notified of the release number of the RRC protocol function used in the radio base station eNB # 1 (for example, Release 8 / Release 9 / Release 10). The gist of the present invention is to have a configured transmission unit 12.

  In the fifth feature of the present embodiment, when the parameters set in the radio base station eNB # 1 are updated, the RRC used by the neighboring radio base station eNB # 2 from the neighboring radio base station eNB # 2 You may further comprise the receiving part 13 comprised so that the release number (For example, Release 8 / Release 9 / Release 10) of a protocol function may be acquired.

  In the fifth feature of the present embodiment, when the parameter set in the radio base station eNB # 1 is updated, the transmission unit 12 controls the radio base station eNB # with respect to the neighboring radio base station eNB # 2. 1 may be configured to notify the release number (for example, Release 8 / Release 9 / Release 10) of the RRC protocol function used in the radio base station eNB adjacent to 1.

  In the fifth feature of the present embodiment, when the parameter set in the radio base station eNB # 1 is updated, the transmission unit 12 controls the radio base station eNB # with respect to the neighboring radio base station eNB # 2. 1 may be configured to notify each of the release numbers (for example, Release 8 / Release 9 / Release 10) of the RRC protocol function used in a cell subordinate to the radio base station eNB adjacent to 1.

  In the fifth feature of the present embodiment, when the parameter set in the radio base station eNB # 1 is updated, the transmission unit 12 controls the radio base station eNB # with respect to the neighboring radio base station eNB # 2. 1 may be configured to notify a release number (for example, Release 8 / Release 9 / Release 10) of the RRC protocol function commonly used in cells under the control of the radio base station eNB adjacent to 1.

  The sixth feature of the present embodiment is the radio base station eNB # 1, and when the identification information (eNB-ID) of the neighboring radio base station eNB # 2 is received from the mobile station UE, via the exchange MME The reception configured to obtain the release number (for example, Release 8 / Release 9 / Release 10) of the RRC protocol function used in the neighboring radio base station eNB # 2 from the neighboring radio base station eNB # 2. The gist is to include the portion 13.

  In the sixth feature of the present embodiment, when the identification information (eNB-ID) of the neighboring radio base station eNB # 2 is received from the mobile station UE, the neighboring radio base station eNB # 2 passes through the switching center MME. On the other hand, it may further include a transmission unit 12 configured to notify the release number (for example, Release 8 / Release 9 / Release 10) of the RRC protocol function used in the radio base station eNB # 1. Good.

  In the fourth to sixth features of the present embodiment, the release number of the RRC protocol function used in the radio base station eNB # 1 is “Release 9”, which is used in the surrounding radio base station eNB # 2. Used by the mobile station UE when the release number of the RRC protocol function is “Release 8” older than “Release 9” and when the mobile station UE has handed over to a cell under the radio base station eNB # 1 A control unit 14 configured to invalidate a setting defined in “Release 8” or later (for example, Release 9 / Release 10 / Release 11 etc.) among the settings related to the RRC protocol function being performed. You may have.

  In the fourth to sixth features of the present embodiment, the release number of the RRC protocol function used in the radio base station eNB # 1 is “Release 9”, which is used in the surrounding radio base station eNB # 2. When the release number of the RRC protocol function is “Release 8” older than “Release 9”, and the cell under the radio base station eNB # 1 of the mobile station UE to the cell under the neighboring radio base station eNB # 2 Specified in “Release 9” or later (for example, Release 8 / Release 10 / Release 11 etc.) among the settings related to the RRC protocol function used in the mobile station UE. The controller 14 may be further configured to invalidate the setting.

  The operations of the radio base station eNB, the mobile station UE, the switching center MME, and the gateway device HeNB-GW described above may be performed by hardware or may be performed by a software module executed by a processor. , Or a combination of both.

  The software module includes a RAM (Random Access Memory), a flash memory, a ROM (Read Only Memory), an EPROM (Erasable Programmable ROM), an EEPROM (Electronically Erasable and Programmable ROM, a hard disk, a registerable ROM, a hard disk). Alternatively, it may be provided in a storage medium of an arbitrary format such as a CD-ROM.

  Such a storage medium is connected to the processor so that the processor can read and write information from and to the storage medium. Further, such a storage medium may be integrated in the processor. Such a storage medium and processor may be provided in the ASIC. Such an ASIC may be provided in the radio base station eNB, the mobile station UE, the exchange MME, or the gateway device HeNB-GW. In addition, the storage medium and the processor may be provided as a discrete component in the radio base station eNB, the mobile station UE, the exchange MME, or the gateway device HeNB-GW.

  Although the present invention has been described in detail using the above-described embodiments, it is obvious to those skilled in the art that the present invention is not limited to the embodiments described in this specification. The present invention can be implemented as modified and changed modes without departing from the spirit and scope of the present invention defined by the description of the scope of claims. Therefore, the description of the present specification is for illustrative purposes and does not have any limiting meaning to the present invention. Therefore, the description of the present specification is for illustrative purposes and does not have any limiting meaning to the present invention.

eNB ... radio base station 11 ... NRT storage unit 12 ... transmitting unit 13 ... receiving unit 14 ... control unit

Claims (32)

In the procedure for setting up a connection between the first radio base station and the second radio base station,
Step A in which the first radio base station notifies the second radio base station of a release number of a predetermined protocol function used in the first radio base station;
The second radio base station includes a step B of notifying the first radio base station of a release number of the predetermined protocol function used in the second radio base station. Communication method.   When the parameter set in the first radio base station is updated, the first radio base station is connected to the second radio base station in which a connection is established with the first radio base station. A mobile communication method comprising a step of notifying a release number of a predetermined protocol function used in the first radio base station.   3. The process according to claim 2, wherein in the step, the first radio base station acquires a release number of the predetermined protocol function used in the second radio base station from the second radio base station. The mobile communication method described.   When the first radio base station receives the identification information of the second radio base station from the mobile station, the predetermined protocol used in the second radio base station from the second radio base station via the switching center A mobile communication method comprising a step of acquiring a function release number.   In the step, the first radio base station notifies the second radio base station of a release number of the predetermined protocol function used in the first radio base station. 5. The mobile communication method according to 4.   The release number of the predetermined protocol function used in the first radio base station is a first release number, the second radio base station exists in the vicinity of the first radio base station, and the second radio base station When the release number of the predetermined protocol function used in the station is a second release number older than the first release number, and the mobile station has handed over to a cell under the first radio base station 6. The method of claim 1, further comprising a step of invalidating a setting defined after the second release number among the settings related to the predetermined protocol function installed in the mobile station. The mobile communication method according to any one of the above.   The release number of the predetermined protocol function used in the first radio base station is a first release number, and the release number of the predetermined protocol function used in the second radio base station is the first release number. The second release number is older than that, and when it is determined to perform a handover from the cell under the first radio base station of the mobile station to the cell under the second radio base station, 6. The method according to claim 1, further comprising a step of invalidating a setting defined after the second release number among the settings related to the predetermined protocol function installed in the mobile station. The mobile communication method according to item. A wireless base station,
In the procedure to set up a connection with the surrounding radio base station,
A transmitter configured to notify the peripheral radio base station of a release number of a predetermined protocol function used in the radio base station;
A radio base station, comprising: a receiving unit configured to obtain a release number of the predetermined protocol function used in the peripheral radio base station from the peripheral radio base station. A wireless base station,
When the parameter set in the radio base station is updated, the predetermined radio base station used for the peripheral radio base station in which a connection is established with the radio base station. A radio base station comprising a transmitter configured to notify a release number of a protocol function.   When a parameter set in the radio base station is updated, a release number of the predetermined protocol function used in the peripheral radio base station is acquired from the peripheral radio base station. The radio base station according to claim 9, further comprising a receiving unit. A wireless base station,
When receiving the identification information of the neighboring radio base station from the mobile station, the release number of the predetermined protocol function used in the neighboring radio base station is acquired from the neighboring radio base station via the exchange. A radio base station comprising a configured receiving unit.   When receiving the identification information of the neighboring radio base station from the mobile station, the release number of the predetermined protocol function used in the radio base station is sent to the neighboring radio base station via the exchange. The radio base station according to claim 11, further comprising a transmission unit configured to notify the radio base station.   The release number of the predetermined protocol function used in the radio base station is a first release number, and the release number of the predetermined protocol function used in the peripheral radio base station is older than the first release number. When the mobile station is handed over to a cell under the radio base station, the second release number of the settings related to the predetermined protocol function installed in the mobile station is the second release number. The radio base station according to any one of claims 8 to 12, further comprising a control unit configured to invalidate a setting defined after the number.   The release number of the predetermined protocol function used in the radio base station is a first release number, and the release number of the predetermined protocol function used in the peripheral radio base station is older than the first release number. If it is a second release number and if it is decided to perform a handover from a cell under the radio base station of the mobile station to a cell under the radio base station, the mobile station is installed in the mobile station. The control unit according to any one of claims 8 to 12, further comprising a control unit configured to invalidate a setting defined after the second release number among the settings related to the predetermined protocol function. A radio base station according to any one of the above.   The said 1st wireless base station notifies the release number of the said predetermined protocol function currently used in the wireless base station adjacent to this 1st wireless base station in the said process A, The said 1st wireless base station is characterized by the above-mentioned. Mobile communication methods.   In the step A, the first radio base station notifies each release number of the predetermined protocol function used in a cell under the radio base station adjacent to the first radio base station. The mobile communication method according to claim 1.   In the step A, the first radio base station notifies a release number of the predetermined protocol function that is commonly used in cells under the radio base station adjacent to the first radio base station. The mobile communication method according to claim 1.   The said 2nd wireless base station notifies the release number of the said predetermined protocol function used in the wireless base station adjacent to this 2nd wireless base station in the said process B, The said 1st wireless base station is characterized by the above-mentioned. Mobile communication methods.   In the step B, the second radio base station notifies each release number of the predetermined protocol function used in a cell under the radio base station adjacent to the second radio base station. The mobile communication method according to claim 1.   In the step B, the second radio base station notifies a release number of the predetermined protocol function that is commonly used in cells under the radio base station adjacent to the second radio base station. The mobile communication method according to claim 1.   In the step, the first radio base station notifies the second radio base station of a release number of a predetermined protocol function used in a radio base station adjacent to the first radio base station. The mobile communication method according to claim 2, wherein:   In the step, each of the first radio base stations, for the second radio base station, has a release number of a predetermined protocol function used in a cell under the radio base station adjacent to the first radio base station. The mobile communication method according to claim 2, wherein the mobile communication method is notified.   In the step, the first radio base station has a release number of a predetermined protocol function that is commonly used for the second radio base station in cells under the radio base station adjacent to the first radio base station. The mobile communication method according to claim 2, wherein the mobile communication method is notified.   The transmitter is configured to notify the peripheral radio base station of a release number of the predetermined protocol function used in a radio base station adjacent to the radio base station. The radio base station according to claim 8.   The transmission unit notifies each of the neighboring radio base stations of each release number of the predetermined protocol function used in a cell under the radio base station adjacent to the radio base station. Item 9. The radio base station according to Item 8.   The transmission unit notifies the peripheral radio base station of a release number of the predetermined protocol function that is commonly used in cells under the radio base station adjacent to the radio base station. Item 9. The radio base station according to Item 8.   The reception unit is configured to acquire a release number of the predetermined protocol function used in a radio base station adjacent to the peripheral radio base station from the peripheral radio base station. Item 9. The radio base station according to Item 8.   The receiving unit is configured to acquire each release number of the predetermined protocol function used in a cell under the control of a radio base station adjacent to the peripheral radio base station from the peripheral radio base station. The radio base station according to claim 8.   The receiving unit is configured to acquire, from the peripheral radio base station, a release number of the predetermined protocol function that is commonly used in cells under the radio base station adjacent to the peripheral radio base station. The radio base station according to claim 8.   When the parameter set in the radio base station is updated, the transmission unit is configured to use the predetermined protocol function used in the radio base station adjacent to the radio base station with respect to the peripheral radio base station. The radio base station according to claim 9, wherein the release number is notified.   When the parameter set in the radio base station is updated, the transmitter is used in the cell under the radio base station adjacent to the radio base station with respect to the peripheral radio base station. The radio base station according to claim 9, wherein the radio base station is configured to notify each release number of a predetermined protocol function.   When the parameter set in the radio base station is updated, the transmitter is commonly used for the neighboring radio base stations in cells under the radio base station adjacent to the radio base station. The radio base station according to claim 9, wherein the radio base station is configured to notify a release number of the predetermined protocol function.

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