JP4788401B2 - Mobile communication system, base station control apparatus, and high quality cell determination method used therefor - Google Patents

Mobile communication system, base station control apparatus, and high quality cell determination method used therefor Download PDF

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JP4788401B2
JP4788401B2 JP2006055648A JP2006055648A JP4788401B2 JP 4788401 B2 JP4788401 B2 JP 4788401B2 JP 2006055648 A JP2006055648 A JP 2006055648A JP 2006055648 A JP2006055648 A JP 2006055648A JP 4788401 B2 JP4788401 B2 JP 4788401B2
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和子 柴田
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本発明は移動通信システム、基地局制御装置及びそれらに用いる高品質セル決定方法に関し、特にIMT−2000(International Mobile Telecommunications 2000)システムにおけるHSDPA(High Speed Downlink Packet Access)実施セルを選出する方法に関する。   The present invention relates to a mobile communication system, a base station control apparatus, and a high-quality cell determination method used for them, and more particularly to a method for selecting an HSDPA (High Speed Downlink Access) implementation cell in an IMT-2000 (International Mobile Telecommunications 2000) system.

HSDPAとは、複数の下り物理チャネルを1セル内の共有リソースとして用意し、複数の移動局(UE:User Equipment)に動的に使用させることによって、下り通信速度の高速化(最大14.4Mbps)を実現する機能である。   HSDPA prepares a plurality of downlink physical channels as shared resources in one cell and dynamically uses a plurality of mobile stations (UE: User Equipment) to increase the downlink communication speed (up to 14.4 Mbps). ).

共有リソースとして用意された下り物理チャネル(Channel)をHS−PDSCH(High Speed Physical Downlink Shared Channel)と呼び、この物理チャネルは、一つの移動局で一つのチャネルしか使用できない。また、HSDPAでは、HS−PDSCHのほかに、A−DPCH(Associated Dedicated Physical Channel)という個別付随チャネルを使用する(例えば、特許文献1参照)。A−DPCHでは、一つの移動局に複数のA−DPCHを確立することが可能である。   A downlink physical channel (Channel) prepared as a shared resource is called HS-PDSCH (High Speed Physical Downlink Shared Channel), and only one channel can be used by one mobile station. In addition, HSDPA uses an individual associated channel called A-DPCH (Associated Dedicated Physical Channel) in addition to HS-PDSCH (see, for example, Patent Document 1). With A-DPCH, it is possible to establish multiple A-DPCHs in one mobile station.

HS−PDSCHを確立するセルは、複数ある無線リンク(Radio Link)の中で最も品質の良いセル(以下、ベストセルとする)が望ましい。このベストセルを測定するために、Intra−frequency measurement reporting eventsの「Event 1d(ベストセルの切替え)」を使用する方法がある。しかしながら、この方法だけでは、移動局がMeasurement Report(測定結果報告)によって「Event 1d」を報告してくるまでの間(「Event 1d」のTime to trigger)は、ベストセルでHSDPAを実施することができない。   The cell that establishes the HS-PDSCH is preferably a cell with the highest quality (hereinafter referred to as the best cell) among a plurality of radio links (Radio Link). In order to measure this best cell, there is a method of using “Event 1d (switching of best cell)” of Intra-frequency measurement reporting events. However, with this method alone, until the mobile station reports “Event 1d” by measurement report (measurement result report) (time to trigger of “Event 1d”), HSDPA should be performed in the best cell. I can't.

この問題は、特に、HS−PDSCHを確立している無線リンクが削除される時にクリティカルとなる。例えば、ある移動局が3つの無線リンクを保持している状態で、HS−PDSCHを確立している無線リンクを削除するイベントである「Event 1b」がMeasurement Report(測定結果報告)によって移動局から報告された時点では、残りの2つの無線リンクのうち、とちらの無線リンクの品質が良いかがわからないため、HSDPAを継続することができない。   This problem becomes particularly critical when the radio link establishing the HS-PDSCH is deleted. For example, in a state where a certain mobile station holds three radio links, “Event 1b” which is an event for deleting a radio link that has established HS-PDSCH is received from the mobile station by a Measurement Report (measurement result report). At the time of reporting, it is not possible to continue HSDPA because it is not known whether the quality of one of the remaining two radio links is good.

特開2004−32561号公報JP 2004-32561 A

上述したIMT−2000システムでは、HSDPA方式での高速パケット通信中に、加入者の移動等によって、ハンドオーバの発生に伴い、HSDPA実施中にHSDPAを停止する可能性があり、そのHSDPAの停止がサービスの低下につながる。   In the above-described IMT-2000 system, during high-speed packet communication in the HSDPA system, there is a possibility that HSDPA may be stopped during HSDPA implementation due to the occurrence of a handover due to subscriber movement or the like. Leading to a decline.

そこで、本発明の目的は上記の問題点を解消し、異なるセル間で移動局の移動が発生した場合でも、HSDPAの実施を可能とすることができる移動通信システム、基地局制御装置及びそれらに用いる高品質セル決定方法を提供することにある。   Accordingly, an object of the present invention is to solve the above-described problems and to enable implementation of HSDPA even when a mobile station moves between different cells. It is to provide a high quality cell determination method to be used.

本発明による移動通信システムは、複数のセルが確立可能な移動局と、前記移動局に対してHSDPA(High Speed Downlink Packet Access)方式での高速パケット通信中に前記複数のセルの中で最も品質の高いベストセルでHSDPAを実施する基地局制御装置とを含む移動通信システムであって、
前記基地局制御装置は、前記移動局から測定結果報告によってイベント情報が報告されてくる時に前記HSDPAが実施中か否かを判定する第1の判定手段と、前記ベストセルが前記HSDPAを実施可能なセルかどうかを判定する第2の判定手段と、少なくとも現在HSDPAを実施中のセルが削除されるかどうか、または現在HSDPAを実施中のセルが削除されるセルかどうかを判定する第3の判定手段と、前記第1〜第3の判定手段各々の判定結果に応じて前記移動局に対してハンドオーバ実施後に前記HSDPAを実施するかどうかを決定する決定手段とを備え
前記決定手段は、前記HSDPAを実施中で、前記ベストセルが前記HSDPA実施可能なセルであれば、前記ハンドオーバ実施後に前記HSDPAを実施すると決定し、前記ベストセルが前記HSDPA実施可能なセルでなければ、前記ハンドオーバのみを実施すると決定し、前記HSDPAを実施中でなく、現在HSDPAを実施中のセルが前記ベストセルであるか、現在HSDPAを実施中のセルが削除されないのであれば、前記ハンドオーバのみを実施すると決定している。
The mobile communication system according to the present invention includes a plurality of cells can be established mobile station, most of the plurality of cells in high-speed packet communication in the HSDPA (High Speed Downlink Packet Access) method to the mobile station quality A mobile communication system including a base station controller that implements HSDPA in a high best cell ,
The base station control device is configured to determine whether or not the HSDPA is being performed when event information is reported from the mobile station through a measurement result report, and the best cell can implement the HSDPA. A second determination means for determining whether the cell is a valid cell; and a third determination unit for determining whether at least a cell currently implementing HSDPA is deleted or whether a cell currently implementing HSDPA is a deleted cell A determination unit; and a determination unit that determines whether or not to implement the HSDPA after the handover is performed on the mobile station according to a determination result of each of the first to third determination units ,
The determination means determines that the HSDPA is performed after the handover if the HSDPA is being performed and the best cell is the cell capable of performing the HSDPA, and the best cell must be a cell capable of performing the HSDPA. For example, if it is determined that only the handover is performed and the cell currently performing HSDPA is not the best cell or the cell currently performing HSDPA is not deleted, the handover is performed. Decided to implement only .

本発明による基地局制御装置は、複数のセルが確立可能な移動局に対してHSDPA(High Speed Downlink Packet Access)方式での高速パケット通信中に前記複数のセルの中で最も品質の高いベストセルでHSDPAを実施する基地局制御装置であって、
前記移動局から測定結果報告によってイベント情報が報告されてくる時に前記HSDPAが実施中か否かを判定する第1の判定手段と、前記ベストセルが前記HSDPAを実施可能なセルかどうかを判定する第2の判定手段と、少なくとも現在HSDPAを実施中のセルが削除されるかどうか、または現在HSDPAを実施中のセルが削除されるセルかどうかを判定する第3の判定手段と、前記第1〜第3の判定手段各々の判定結果に応じて前記移動局に対してハンドオーバ実施後に前記HSDPAを実施するかどうかを決定する決定手段とを備え
前記決定手段は、前記HSDPAを実施中で、前記ベストセルが前記HSDPA実施可能なセルであれば、前記ハンドオーバ実施後に前記HSDPAを実施すると決定し、前記ベストセルが前記HSDPA実施可能なセルでなければ、前記ハンドオーバのみを実施すると決定し、前記HSDPAを実施中でなく、現在HSDPAを実施中のセルが前記ベストセルであるか、現在HSDPAを実施中のセルが削除されないのであれば、前記ハンドオーバのみを実施すると決定している。
The base station control apparatus according to the present invention, the highest quality best cell among the plurality of cells to a high speed packet transmission in HSDPA (High Speed Downlink Packet Access) scheme for a plurality of cells can be established mobile station A base station controller that implements HSDPA
First event determination means for determining whether or not the HSDPA is being performed when event information is reported from the mobile station as a measurement result report, and determining whether or not the best cell is a cell capable of performing the HSDPA A second determination means; a third determination means for determining whether at least a cell currently performing HSDPA is deleted ; or a third determination means for determining whether a cell currently executing HSDPA is a deleted cell; Determining means for determining whether or not to implement the HSDPA after performing handover for the mobile station according to the determination result of each of the third determination means ;
The determination means determines that the HSDPA is performed after the handover if the HSDPA is being performed and the best cell is the cell capable of performing the HSDPA, and the best cell must be a cell capable of performing the HSDPA. For example, if it is determined that only the handover is performed and the cell currently performing HSDPA is not the best cell or the cell currently performing HSDPA is not deleted, the handover is performed. Decided to implement only .

本発明による高品質セル決定方法は、複数のセルが確立可能な移動局と、前記移動局に対してHSDPA(High Speed Downlink Packet Access)方式での高速パケット通信中に前記複数のセルの中で最も品質の高いベストセルでHSDPAを実施する基地局制御装置とを含む移動通信システムに用いる高品質セル決定方法であって、
前記基地局制御装置が、前記移動局から測定結果報告によってイベント情報が報告されてくる時に前記HSDPAが実施中か否かを判定する第1の判定処理と、前記ベストセルが前記HSDPAを実施可能なセルかどうかを判定する第2の判定処理と、少なくとも現在HSDPAを実施中のセルが削除されるかどうか、または現在HSDPAを実施中のセルが削除されるセルかどうかを判定する第3の判定処理と、前記第1〜第3の判定手段各々の判定結果に応じて前記移動局に対してハンドオーバ実施後に前記HSDPAを実施するかどうかを決定する決定処理とを実行し、
前記決定処理において、前記HSDPAを実施中で、前記ベストセルが前記HSDPA実施可能なセルであれば、前記ハンドオーバ実施後に前記HSDPAを実施すると決定し、前記ベストセルが前記HSDPA実施可能なセルでなければ、前記ハンドオーバのみを実施すると決定し、前記HSDPAを実施中でなく、現在HSDPAを実施中のセルが前記ベストセルであるか、現在HSDPAを実施中のセルが削除されないのであれば、前記ハンドオーバのみを実施すると決定している。
High quality cell determination method according to the present invention includes a plurality of cells can be established mobile station, among the plurality of cells to the mobile station during high-speed packet communication in the HSDPA (High Speed Downlink Packet Access) scheme A high quality cell determination method for use in a mobile communication system including a base station controller that implements HSDPA in a best quality best cell ,
The base station controller can perform first determination processing for determining whether or not the HSDPA is being performed when event information is reported from the mobile station by a measurement result report, and the best cell can perform the HSDPA. A second determination process for determining whether or not a cell is a valid cell; and a third determination process for determining whether or not at least a cell currently implementing HSDPA is deleted or whether a cell currently implementing HSDPA is a deleted cell A determination process, and a determination process for determining whether to perform the HSDPA after the handover is performed on the mobile station according to the determination results of the first to third determination units ,
In the determination process, if the HSDPA is being performed and the best cell is a cell capable of performing the HSDPA, it is determined that the HSDPA is performed after the handover is performed, and the best cell must be a cell capable of performing the HSDPA. For example, if it is determined that only the handover is performed and the cell currently performing HSDPA is not the best cell or the cell currently performing HSDPA is not deleted, the handover is performed. Decided to implement only .

すなわち、本発明の移動通信システムは、IMT−2000(International Mobile Telecommunications 2000)システムの基地局制御装置(RNC:Radio Network Controller)において、HSDPA(High Speed Downlink Packet Access)方式での高速パケット通信時に、確立している無線リンク(Radio Link)が複数ある場合、最も品質の高い無線リンクでHSDPAを実施する必要があり、この最も品質の高い無線リンクを決定することで、HSDPAをより実施しやすくしている。   That is, the mobile communication system of the present invention is a base station controller (RNC: Radio Network Controller) of an IMT-2000 (International Mobile Telecommunications 2000) system in HSDPA (High Speed Downlink Packet communication). When there are multiple established radio links (Radio Link), it is necessary to implement HSDPA on the radio link with the highest quality. By determining the radio link with the highest quality, it is easier to implement HSDPA. ing.

本発明の移動通信システムでは、最も品質の良いセル(以下、ベストセルとする)を知る方法として、ベストセルの切替えを行うイベントである「Event 1d」のほかに、Intra−frequency measurement reporting eventsの「Event 1a」,「Event 1b」,「Event 1c」を使用している。   In the mobile communication system of the present invention, as a method of knowing the cell with the best quality (hereinafter referred to as the best cell), in addition to “Event 1d” which is an event for switching the best cell, Intra-frequency measurement reporting events “Event 1a”, “Event 1b”, and “Event 1c” are used.

ここで、「Event 1a」はHS−PDSCHを確立している無線リンクを追加するイベントであり、「Event 1b」はHS−PDSCHを確立している無線リンクを削除するイベントであり、「Event 1c」は未接続セルが接続セルよりも品質が良好であることを通知するイベントである[3GPP TS25.331 V6.8.0“Radio Resource Control(RRC);Protocol Specification”(2005−12)(非特許文献1)参照]。これらのイベントはMeasurement Report(測定結果報告)によって移動局から報告されてくるものである。   Here, “Event 1a” is an event for adding a radio link that establishes HS-PDSCH, and “Event 1b” is an event for deleting a radio link that establishes HS-PDSCH, and “Event 1c” "Is an event notifying that an unconnected cell has better quality than a connected cell [3GPP TS25.331 V6.8.0“ Radio Resource Control (RRC); Protocol Specification ”(2005-12) (non- See Patent Document 1)]. These events are reported from the mobile station by Measurement Report (measurement result report).

基地局制御装置は「Event 1a」,「Event 1b」,「Event 1c」のMeasurement Report(測定結果報告)を受信した際に、メッセージ内のIntra−frequency measured results listとアクティブセット(Active Set:接続セル)とを比較し、アクティブセットにあるセルの中でIntra−frequency measured results listの先頭にあるセルを最も品質の良いセルとみなす。   When the base station controller receives Measurement Report (measurement result report) of “Event 1a”, “Event 1b”, and “Event 1c”, the Intra-frequency measured results list and the active set (Active connection set: Active connection set: Active connection set: Active connection set: Active connection set) And the cell at the head of the intra-frequency measured results list among the cells in the active set is regarded as the cell with the highest quality.

この方式によって、本発明の移動通信システムでは、例えば、ある移動局が3つの無線リンクを保持している状態で、HS−PDSCHを確立している無線リンクを削除するイベントである「Event 1b」をMeasurement Report(測定結果報告)にて受信した時点で、残りの無線リンクのうち品質のよい方がHSDPAが可能なセルであれば、HSDPAを継続することが可能となる。   With this method, in the mobile communication system of the present invention, for example, “Event 1b”, which is an event for deleting a radio link that has established HS-PDSCH in a state where a certain mobile station holds three radio links. Is received at Measurement Report (measurement result report), if the higher quality of the remaining radio links is a cell capable of HSDPA, HSDPA can be continued.

このように、本発明の移動通信システムでは、最も品質のよい無線リンクを早めに知ることによって、HSDPAを実施する機会を増やすことを可能としている。よって、本発明の移動通信システムでは、基地局制御装置において異なるセル間での移動局の移動が発生した場合でも、HSDPAの実施が可能となる。   As described above, in the mobile communication system of the present invention, it is possible to increase the opportunity to implement HSDPA by knowing the radio link with the best quality early. Therefore, in the mobile communication system of the present invention, HSDPA can be implemented even when the mobile station moves between different cells in the base station controller.

本発明は、上記のような構成及び動作とすることで、異なるセル間で移動局の移動が発生した場合でも、HSDPAの実施を可能とすることができるという効果が得られる。   By adopting the above-described configuration and operation, the present invention provides an effect that HSDPA can be implemented even when a mobile station moves between different cells.

次に、本発明の実施例について図面を参照して説明する。図1は本発明の一実施例による移動通信システムの構成を示すブロック図である。図1において、本発明の一実施例による移動通信システムは、移動局(UE:User Equipment)1と、セル(Cell)20−1,20−2をそれぞれ管理する基地局(Node−B)2−1,2−2と、基地局2−1,2−2を管理する基地局制御装置(RNC:Radio Network Controller)3と、移動交換網の交換動作を行う移動交換局(CN:Core Network)4とから構成されており、基地局制御装置3はデータの複製分配や合成選択を行う複製分配/合成選択装置(MDC:Macro Diversity Combining)31を備えている。   Next, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing the configuration of a mobile communication system according to an embodiment of the present invention. 1, a mobile communication system according to an embodiment of the present invention includes a mobile station (UE) 1 and a base station (Node-B) 2 that manages cells 20-1 and 20-2, respectively. -1,2-2, a base station controller (RNC: Radio Network Controller) 3 that manages the base stations 2-1 and 2-2, and a mobile switching center (CN: Core Network) that performs switching operation of the mobile switching network ) 4, and the base station control device 3 includes a replication distribution / combination selection device (MDC: Macro Diversity Combining) 31 that performs data replication distribution and combination selection.

本発明の一実施例による移動通信システムは、IMT−2000(International Mobile Telecommunications 2000)システムであり、このシステム内の基地局制御装置3では、HSDPA(High Speed Downlink Packet Access)方式での高速パケット通信時に、確立している無線リンク(Radio Link)(以下、セルとする)が複数ある場合、最も品質の高いセルでHSDPAを実施する必要があり、この最も品質の高いセルを決定することで、HSDPAをより実施しやすくしている。   The mobile communication system according to an embodiment of the present invention is an IMT-2000 (International Mobile Telecommunications 2000) system, and the base station controller 3 in this system uses high-speed packet communication in the HSDPA (High Speed Downlink Packet Access) system. Sometimes, if there are multiple radio links (Radio Link) (hereinafter referred to as cells), it is necessary to perform HSDPA on the highest quality cell, and by determining this highest quality cell, Making HSDPA easier to implement.

本実施例では、最も品質の良いセル(以下、ベストセルとする)を知る方法として、ベストセルの切替えを行うイベントである「Event 1d」のほかに、Measurement Report(測定結果報告)によって移動局1から報告されてくるIntra−frequency measurement reporting eventsの「Event 1a」,「Event 1b」,「Event 1c」を使用している。   In this embodiment, as a method of knowing the cell with the highest quality (hereinafter referred to as the best cell), in addition to “Event 1d” which is an event for switching the best cell, the mobile station uses a measurement report (measurement result report). “Event 1a”, “Event 1b”, and “Event 1c” of Intra-frequency measurement reporting events reported from No. 1 are used.

ここで、「Event 1a」はHS−PDSCHを確立している無線リンクを追加するイベントであり、「Event 1b」はHS−PDSCHを確立している無線リンクを削除するイベントであり、「Event 1c」は未接続セルが接続セルよりも品質が良好であることを通知するイベントである(非特許文献1の10.3.7.39章参照)。これらのイベントはMeasurement Report(測定結果報告)によって移動局1から報告されてくる。   Here, “Event 1a” is an event for adding a radio link that establishes HS-PDSCH, and “Event 1b” is an event for deleting a radio link that establishes HS-PDSCH, and “Event 1c” "Is an event for notifying that an unconnected cell has better quality than a connected cell (see 10.3.7.39 of Non-Patent Document 1). These events are reported from the mobile station 1 by Measurement Report (measurement result report).

基地局制御装置3は「Event 1a」,「Event 1b」,「Event 1c」のMeasurement Report(測定結果報告)を受信した際に、メッセージ内のIntra−frequency measured results listとアクティブセット(Active Set:接続セル)とを比較し、アクティブセットにあるセルの中でIntra−frequency measured results listの先頭にあるセルをベストセルとみなす。   When the base station control device 3 receives Measurement Report (measurement result report) of “Event 1a”, “Event 1b”, and “Event 1c”, the intra-frequency measured results list and the active set (Active: Set): And the cell at the head of the intra-frequency measured results list among the cells in the active set is regarded as the best cell.

図2は図1の基地局制御装置3のMeasurement Report(「Event 1a」,「Event 1b」,「Event 1c」,「Event 1d」)受信時の処理決定動作を示すフローチャートである。図3は3GPPのIntra−frequency measured results list(非特許文献1の10.3.7.35章参照)の構成を示す図であり、図4は3GPPのIntra−frequency measured event results(非特許文献1の10.3.7.37章参照)の構成を示す図であり、図5は3GPPのCell measured event results(非特許文献1の10.3.7.4章参照)の構成を示す図である。   FIG. 2 is a flowchart showing a process determination operation at the time of reception of Measurement Report (“Event 1a”, “Event 1b”, “Event 1c”, “Event 1d”) of the base station controller 3 of FIG. FIG. 3 is a diagram showing a configuration of 3GPP Intra-frequency measured results list (see 10.3.7.35 of Non-Patent Document 1), and FIG. 4 is an illustration of 3GPP Intra-frequency measured events (non-patent literature). 1 is a diagram showing a configuration of 10.3.7.37), and FIG. 5 is a diagram showing a configuration of 3GPP Cell measured event results (see 10.3.7.4 of Non-Patent Document 1). It is.

これら図1〜図5を参照して、基地局制御装置3のMeasurement Report(「Event 1a」,「Event 1b」,「Event 1c」,「Event 1d」)受信時の処理決定について説明する。   With reference to FIG. 1 to FIG. 5, processing determination at the time of reception of Measurement Report (“Event 1a”, “Event 1b”, “Event 1c”, “Event 1d”) of the base station control device 3 will be described.

以下の説明では、「Event 1a」,「Event 1b」,「Event 1c」のMeasurement Reportを受信した場合に、アクティブセットにあるセルの中でIntra−frequency measured results list(図3参照)の先頭にあるセルがベストセルであり、「Event 1d」のMeasurement Reportを受信した場合に、Intra−frequency measurement event results(図4及び図5参照)にあるセルがベストセルであるものとする。また、アクティブセットとは、Measurement Reportによるハンドオーバ(Hand Over)実施後のアクティブセットのことである。   In the following description, when a measurement report of “Event 1a”, “Event 1b”, and “Event 1c” is received, the intra-frequency measured results list (see FIG. 3) is first in the cell in the active set. When a certain cell is the best cell and a measurement report of “Event 1d” is received, the cell in Intra-frequency measurement event results (see FIGS. 4 and 5) is the best cell. The active set is an active set after the handover (Hand Over) by the Measurement Report.

基地局制御装置3はMeasurement Report(「Event 1a」,「Event 1b」,「Event 1c」,「Event 1d」)を受信時に(図2ステップS1)、HSDPAを実施中で(図2ステップS2)、ベストセルがHSDPA実施可能なセルであれば(図2ステップS3)、ハンドオーバ実施後に、HSDPAを実施する(図2ステップS4)。これに対し、ベストセルがHSDPA実施可能なセルでなければ(図2ステップS3)、基地局制御装置3はハンドオーバのみを実施する(図2ステップS5)。   When the base station control device 3 receives Measurement Report ("Event 1a", "Event 1b", "Event 1c", "Event 1d") (step S1 in FIG. 2), HSDPA is being performed (step S2 in FIG. 2). If the best cell is a cell that can perform HSDPA (step S3 in FIG. 2), HSDPA is performed after the handover is performed (step S4 in FIG. 2). On the other hand, if the best cell is not a cell capable of performing HSDPA (step S3 in FIG. 2), the base station control device 3 performs only a handover (step S5 in FIG. 2).

一方、基地局制御装置3はHSDPAを実施中でなく(図2ステップS2)、現在HSDPAを実施中のセルがベストセルであるか、現在HSDPAを実施中のセルが削除されないのであれば(図2ステップS6)、ハンドオーバのみを実施する(現在HSDPAを実施中のセルでHSDPAを継続実施する)(図2ステップS7)。   On the other hand, if the base station controller 3 is not implementing HSDPA (step S2 in FIG. 2) and the cell currently implementing HSDPA is the best cell or the cell currently implementing HSDPA is not deleted (FIG. 2 Step S6), only the handover is carried out (HSDPA is continuously carried out in the cell currently carrying out HSDPA) (Step S7 in FIG. 2).

基地局制御装置3は現在HSDPAを実施中のセルがベストセルでないか、現在HSDPAを実施中のセルが削除されるのであれば(図2ステップS6)、ベストセルがHSDPA実施可能なセルの場合(図2ステップS8)、ハンドオーバ実施後、HS−PDSCHを確立するセルを変更し、HSDPAを継続実施する(図2ステップS9)。また、基地局制御装置3はベストセルがHSDPA実施可能なセルでない場合(図2ステップS8)、ハンドオーバ実施後、実施中のHSDPAを停止する(図2ステップS10)。   If the cell currently implementing HSDPA is not the best cell, or if the cell currently implementing HSDPA is deleted (step S6 in FIG. 2), the base station controller 3 determines that the best cell is a cell capable of HSDPA implementation. (Step S8 in FIG. 2) After the handover, the cell for establishing the HS-PDSCH is changed and the HSDPA is continued (Step S9 in FIG. 2). In addition, when the best cell is not a cell that can perform HSDPA (step S8 in FIG. 2), the base station control device 3 stops the HSDPA being performed after the handover is performed (step S10 in FIG. 2).

このように、本実施例では、基地局制御装置3において、Measurement Report(「Event 1a」,「Event 1b」,「Event 1c」,「Event 1d」)を受信時に、HSDPAが実施中か否か、ベストセルがHSDPA実施可能なセルかどうか、現在HSDPAを実施中のセルが削除されるかどうかを判定し、その判定結果に応じてハンドオーバ実施後にHSDPAを実施するかどうかを決定することで、異なるセル間での端末移動が発生した場合でも、なるべくHSDPAを実施することが可能となる。   As described above, in the present embodiment, whether or not HSDPA is being performed when the base station control device 3 receives Measurement Report ("Event 1a", "Event 1b", "Event 1c", "Event 1d"). Determining whether the best cell is a cell capable of performing HSDPA, determining whether a cell currently implementing HSDPA is deleted, and determining whether to implement HSDPA after performing handover according to the determination result, Even when terminal movement occurs between different cells, HSDPA can be implemented as much as possible.

本発明の一実施例による移動通信システムの構成を示すブロック図である。It is a block diagram which shows the structure of the mobile communication system by one Example of this invention. 図1の基地局制御装置3のMeasurement Report受信時の処理決定動作を示すフローチャートである。It is a flowchart which shows the process determination operation | movement at the time of Measurement Report reception of the base station control apparatus 3 of FIG. 3GPPのIntra−frequency measured results listの構成を示す図である。It is a figure which shows the structure of InGP-Intra-frequency measured results list of 3GPP. 3GPPのIntra−frequency measured event resultsの構成を示す図である。It is a figure which shows the structure of 3GPP Intra-frequency measured event results. 3GPPのCell measured event resultsの構成を示す図である。It is a figure which shows the structure of Cell measured event results of 3GPP.

符号の説明Explanation of symbols

1 移動局
2−1,2−2 基地局
3 基地局制御装置
4 移動交換局
20−1,20−2 セル
31 複製分配/合成選択装置
1 Mobile station 2-1, 2-2 Base station
3 Base station controller
4 Mobile switching center 20-1, 20-2 cells
31 Replica distribution / composition selection device

Claims (6)

複数のセルが確立可能な移動局と、前記移動局に対してHSDPA(High Speed Downlink Packet Access)方式での高速パケット通信中に前記複数のセルの中で最も品質の高いベストセルでHSDPAを実施する基地局制御装置とを含む移動通信システムであって、
前記基地局制御装置は、前記移動局から測定結果報告によってイベント情報が報告されてくる時に前記HSDPAが実施中か否かを判定する第1の判定手段と、前記ベストセルが前記HSDPAを実施可能なセルかどうかを判定する第2の判定手段と、少なくとも現在HSDPAを実施中のセルが削除されるかどうか、または現在HSDPAを実施中のセルが削除されるセルかどうかを判定する第3の判定手段と、前記第1〜第3の判定手段各々の判定結果に応じて前記移動局に対してハンドオーバ実施後に前記HSDPAを実施するかどうかを決定する決定手段とを有し、
前記決定手段は、前記HSDPAを実施中で、前記ベストセルが前記HSDPA実施可能なセルであれば、前記ハンドオーバ実施後に前記HSDPAを実施すると決定し、前記ベストセルが前記HSDPA実施可能なセルでなければ、前記ハンドオーバのみを実施すると決定し、前記HSDPAを実施中でなく、現在HSDPAを実施中のセルが前記ベストセルであるか、現在HSDPAを実施中のセルが削除されないのであれば、前記ハンドオーバのみを実施すると決定することを特徴とする移動通信システム。
Implementation and multiple cells can be established the mobile station, the HSDPA in HSDPA (High Speed Downlink Packet Access) highest quality best cell among the plurality of cells during high-speed packet communication in a manner to the mobile station A mobile communication system including a base station control device,
The base station control device is configured to determine whether or not the HSDPA is being performed when event information is reported from the mobile station through a measurement result report, and the best cell can implement the HSDPA. A second determination means for determining whether the cell is a valid cell; and a third determination unit for determining whether at least a cell currently implementing HSDPA is deleted or whether a cell currently implementing HSDPA is a deleted cell It possesses a determining means, and determination means for determining whether to perform the HSDPA after the handover performed for the mobile station in response to the first to third determination means each determination result,
The determination means determines that the HSDPA is performed after the handover if the HSDPA is being performed and the best cell is the cell capable of performing the HSDPA, and the best cell must be a cell capable of performing the HSDPA. For example, if it is determined that only the handover is performed and the cell currently performing the HSDPA is not the best cell or the cell currently performing the HSDPA is not deleted, the handover is performed. A mobile communication system, characterized in that it is decided to implement only .
前記イベント情報は、HS−PDSCH(High Speed Physical Downlink Shared Channel)を確立しているセルを追加するイベントと、前記HS−PDSCHを確立しているセルを削除するイベントと、未接続のセルが接続しているセルよりも品質が良好であることを通知するイベントと、前記ベストセルを切換えるイベントとを含むことを特徴とする請求項1記載の移動通信システム。 The event information includes an event for adding a cell that establishes HS-PDSCH (High Speed Physical Downlink Shared Channel), an event for deleting a cell that establishes HS-PDSCH, and an unconnected cell connected the mobile communication system according to claim 1, comprising: the event quality than are overlapped cells indicates that it is good, and an event for switching the best cell. 複数のセルが確立可能な移動局に対してHSDPA(High Speed Downlink Packet Access)方式での高速パケット通信中に前記複数のセルの中で最も品質の高いベストセルでHSDPAを実施する基地局制御装置であって、A base station controller that performs HSDPA in the best cell having the highest quality among the plurality of cells during high-speed packet communication in a high speed downlink packet access (HSDPA) scheme for a mobile station capable of establishing a plurality of cells Because
前記移動局から測定結果報告によってイベント情報が報告されてくる時に前記HSDPAが実施中か否かを判定する第1の判定手段と、前記ベストセルが前記HSDPAを実施可能なセルかどうかを判定する第2の判定手段と、少なくとも現在HSDPAを実施中のセルが削除されるかどうか、または現在HSDPAを実施中のセルが削除されるセルかどうかを判定する第3の判定手段と、前記第1〜第3の判定手段各々の判定結果に応じて前記移動局に対してハンドオーバ実施後に前記HSDPAを実施するかどうかを決定する決定手段とを有し、First event determination means for determining whether or not the HSDPA is being performed when event information is reported from the mobile station as a measurement result report, and determining whether or not the best cell is a cell capable of performing the HSDPA A second determination means; a third determination means for determining whether at least a cell currently performing HSDPA is deleted; or a third determination means for determining whether a cell currently executing HSDPA is a deleted cell; Determining means for determining whether or not to implement the HSDPA after the handover is performed on the mobile station according to the determination result of each of the third determination means;
前記決定手段は、前記HSDPAを実施中で、前記ベストセルが前記HSDPA実施可能なセルであれば、前記ハンドオーバ実施後に前記HSDPAを実施すると決定し、前記ベストセルが前記HSDPA実施可能なセルでなければ、前記ハンドオーバのみを実施すると決定し、前記HSDPAを実施中でなく、現在HSDPAを実施中のセルが前記ベストセルであるか、現在HSDPAを実施中のセルが削除されないのであれば、前記ハンドオーバのみを実施すると決定することを特徴とする基地局制御装置。The determination means determines that the HSDPA is performed after the handover if the HSDPA is being performed and the best cell is the cell capable of performing the HSDPA, and the best cell must be a cell capable of performing the HSDPA. For example, if it is determined that only the handover is performed and the cell currently performing HSDPA is not the best cell or the cell currently performing HSDPA is not deleted, the handover is performed. Base station controller characterized in that it is decided to implement only.
前記イベント情報は、HS−PDSCH(High Speed Physical Downlink Shared Channel)を確立しているセルを追加するイベントと、前記HS−PDSCHを確立しているセルを削除するイベントと、未接続のセルが接続しているセルよりも品質が良好であることを通知するイベントと、前記ベストセルを切換えるイベントとを含むことを特徴とする請求項3記載の基地局制御装置。 The event information includes an event for adding a cell that establishes HS-PDSCH (High Speed Physical Downlink Shared Channel), an event for deleting a cell that establishes HS-PDSCH, and an unconnected cell connected 4. The base station control apparatus according to claim 3 , further comprising an event for notifying that the quality is better than that of a cell being operated and an event for switching the best cell . 複数のセルが確立可能な移動局と、前記移動局に対してHSDPA(High Speed Downlink Packet Access)方式での高速パケット通信中に前記複数のセルの中で最も品質の高いベストセルでHSDPAを実施する基地局制御装置とを含む移動通信システムに用いる高品質セル決定方法であって、A mobile station capable of establishing a plurality of cells, and HSDPA in the best cell with the highest quality among the plurality of cells during high-speed packet communication using the High Speed Downlink Packet Access (HSDPA) method for the mobile station A high quality cell determination method for use in a mobile communication system including a base station control device,
前記基地局制御装置が、前記移動局から測定結果報告によってイベント情報が報告されてくる時に前記HSDPAが実施中か否かを判定する第1の判定処理と、前記ベストセルが前記HSDPAを実施可能なセルかどうかを判定する第2の判定処理と、少なくとも現在HSDPAを実施中のセルが削除されるかどうか、または現在HSDPAを実施中のセルが削除されるセルかどうかを判定する第3の判定処理と、前記第1〜第3の判定手段各々の判定結果に応じて前記移動局に対してハンドオーバ実施後に前記HSDPAを実施するかどうかを決定する決定処理とを実行し、The base station controller can perform first determination processing for determining whether or not the HSDPA is being performed when event information is reported from the mobile station by a measurement result report, and the best cell can perform the HSDPA. A second determination process for determining whether or not a cell is a valid cell; and a third determination process for determining whether or not at least a cell currently implementing HSDPA is deleted or whether a cell currently implementing HSDPA is a deleted cell A determination process, and a determination process for determining whether to perform the HSDPA after the handover is performed on the mobile station according to the determination results of the first to third determination units,
前記決定処理において、前記HSDPAを実施中で、前記ベストセルが前記HSDPA実施可能なセルであれば、前記ハンドオーバ実施後に前記HSDPAを実施すると決定し、前記ベストセルが前記HSDPA実施可能なセルでなければ、前記ハンドオーバのみを実施すると決定し、前記HSDPAを実施中でなく、現在HSDPAを実施中のセルが前記ベストセルであるか、現在HSDPAを実施中のセルが削除されないのであれば、前記ハンドオーバのみを実施すると決定することを特徴とする高品質セル決定方法。In the determination process, if the HSDPA is being performed and the best cell is a cell capable of performing the HSDPA, it is determined that the HSDPA is performed after the handover is performed, and the best cell must be a cell capable of performing the HSDPA. For example, if it is determined that only the handover is performed and the cell currently performing the HSDPA is not the best cell or the cell currently performing the HSDPA is not deleted, the handover is performed. A high-quality cell determination method characterized in that it is determined to implement only
前記イベント情報は、HS−PDSCH(High Speed Physical Downlink Shared Channel)を確立しているセルを追加するイベントと、前記HS−PDSCHを確立しているセルを削除するイベントと、未接続のセルが接続しているセルよりも品質が良好であることを通知するイベントと、前記ベストセルを切換えるイベントとを含むことを特徴とする請求項5記載の高品質セル決定方法。The event information includes an event for adding a cell that establishes HS-PDSCH (High Speed Physical Downlink Shared Channel), an event for deleting a cell that establishes HS-PDSCH, and an unconnected cell connected 6. The high quality cell determination method according to claim 5, further comprising an event for notifying that the quality is better than that of a cell being operated and an event for switching the best cell.
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