WO2010126112A1 - Radio base station - Google Patents
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- WO2010126112A1 WO2010126112A1 PCT/JP2010/057627 JP2010057627W WO2010126112A1 WO 2010126112 A1 WO2010126112 A1 WO 2010126112A1 JP 2010057627 W JP2010057627 W JP 2010057627W WO 2010126112 A1 WO2010126112 A1 WO 2010126112A1
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- mobile station
- permission information
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/12—Wireless traffic scheduling
- H04W72/1263—Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows
- H04W72/1268—Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows of uplink data flows
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/20—Control channels or signalling for resource management
- H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
Definitions
- the present invention relates to a radio base station.
- EUL Enhanced Uplink
- the radio base station NodeB is the scheduling target mobile station UE # in the current scheduling interval. 1 is transmitted via E-AGCH (E-DCH Absolute Grant Channel) to instruct to stop transmission of uplink data in the next scheduling interval, and scheduling in the next scheduling interval
- E-AGCH E-DCH Absolute Grant Channel
- the mobile station to be scheduled can be switched by transmitting a predetermined AG (Absolute Grant) to the target mobile station UE # 2 via E-AGCH. .
- the radio base station NodeB is directed to the mobile station UE # 1. There is a problem that “Zero Grant” cannot be transmitted.
- the mobile station UE # 1 continues to transmit uplink data even after the next scheduling section is started. All the uplink data becomes uplink interference in the radio base station NodeB, and the original scheduling target There arises a problem that the uplink transmission rate in the mobile station UE # 2 cannot be increased.
- the mobile station is configured to perform the individual transmission for high-speed uplink communication based on the transmission power ratio between the dedicated data channel for high-speed uplink communication and the dedicated control channel for general uplink communication corresponding to the received scheduling permission information.
- a radio base station used in a mobile communication system configured to determine transmission power of uplink data to be transmitted via a data channel, and one mobile station to be scheduled for high-speed uplink communication in each scheduling section
- Scheduling pair for high-speed uplink communication in the current scheduling interval Transmitting first scheduling permission information for instructing the first mobile station to stop transmission of uplink data in the next scheduling interval, and second scheduling target for high-speed uplink communication in the next scheduling interval
- a scheduling permission information transmitting unit configured to transmit second scheduling permission information determined by the scheduling unit to a station, wherein the scheduling permission information transmitting unit has the next scheduling interval Before starting, the
- FIG. 1 is an overall configuration diagram of a mobile communication system according to a first embodiment of the present invention.
- FIG. 2 is a functional block diagram of the radio base station according to the first embodiment of the present invention.
- FIG. 3 is a diagram for explaining scheduling processing by the radio base station according to the first embodiment of the present invention.
- FIG. 4 is a diagram for explaining scheduling processing by the radio base station according to the first embodiment of the present invention.
- 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.
- the mobile communication system according to the present embodiment includes a radio base station NodeB and a mobile station UE.
- the mobile communication system according to the present embodiment is configured to perform “Time & Rate” type EUL communication (high-speed uplink communication).
- the mobile station UE transmits uplink data for high-speed communication via, for example, E-DPDCH (E-DCH Dedicated Physical Data Channel, dedicated data channel for high-speed uplink communication).
- E-DPDCH E-DCH Dedicated Physical Data Channel, dedicated data channel for high-speed uplink communication
- a control signal for high-speed communication is transmitted via E-DPCCH (E-DCH Dedicated Physical Control Channel), and for general communication via DPCCH (Dedicated Physical Control Channel, general control channel for general uplink communication)
- DPCCH Dedicated Physical Control Channel, general control channel for general uplink communication
- the radio base station NodeB is configured to transmit AG (scheduling permission information) via, for example, E-AGCH.
- the mobile station UE sets the transmission power ratio between the E-DPDCH (dedicated data channel for high-speed uplink communication) and DPCCH (dedicated control channel for general uplink communication) corresponding to the AG received from the radio base station NodeB. Based on this, it is configured to determine the transmission power of uplink data (MAC-e PDU) to be transmitted via E-DPDCH.
- E-DPDCH dedicated data channel for high-speed uplink communication
- DPCCH dedicated control channel for general uplink communication
- the radio base station NodeB includes a scheduling unit 11 and an AG transmission unit 12.
- the scheduling unit 11 is configured to determine a mobile station UE to be scheduled for EUL communication in each scheduling section and an AG to be transmitted to the mobile station UE.
- each scheduling section is composed of one or a plurality of TTIs.
- the scheduling unit 11 determines only one mobile station UE to be scheduled for EUL communication in each scheduling section, and schedules the EUL communication for the EUL communication. An AG to be transmitted to the mobile station UE is determined.
- the AG transmission unit 12 is configured to transmit the AG determined by the scheduling unit 11 to the mobile station UE to be scheduled in each scheduling section.
- “Time & Rate” type EUL communication is performed, for example, as illustrated in FIG. 3, when the AG transmission unit 12 switches the mobile station UE to be scheduled for EUL communication, “Zero Grant (first scheduling permission information)” is transmitted to instruct the mobile station UE # 1 (first mobile station) to be scheduled for EUL communication to stop transmission of uplink data in the next scheduling interval. Then, “AG (second scheduling permission information)” determined by the scheduling unit 11 is transmitted to the mobile station UE # 2 (second mobile station) to be scheduled for EUL communication in the next scheduling interval. It is configured.
- the AG transmission unit 12 performs the same “Zero Grant” for the mobile station UE # 1 a plurality of times before the next scheduling period (the period from t2 to t3) starts. ".”
- the AG transmission unit 12 may be configured to transmit “Zero Grant” to the mobile station UE # 1 in a plurality of continuous TTIs.
- the AG transmission unit 12 may be configured to transmit the same AG multiple times to the mobile station UE # 2 when starting the next scheduling interval.
- the AG transmission unit 12 may be configured to transmit the same AG multiple times to the mobile station UE # 2 after the next scheduling section starts.
- the radio base station NodeB when the “Time & Rate” type EUL communication is performed, the radio base station NodeB can perform the scheduling of the mobile station UE to be scheduled in the current scheduling interval. Since # 1 is configured to transmit the same “Zero Grant” multiple times before it is no longer the scheduling target mobile station UE, the mobile station UE # 1 fails to receive “Zero Grant” The probability of performing can be reduced.
- EUL communication other than “Time & Rate” type EUL communication is performed, as shown in FIG. 4, a plurality of mobile stations UE # 1 to UE # 3 perform scheduling in one scheduling allocation section. Since it is possible to become the target mobile station UE, the radio base station NodeB sets “Zero Grant” even if reception of “Zero Grant” fails in each of the mobile stations UE # 1 to UE # 3. By retransmitting, transmission of uplink data in each of the mobile stations UE # 1 to UE # 3 can be stopped.
- the first feature of the present embodiment is that the mobile station UE receives E-DPDCH (dedicated data channel for high-speed uplink communication) and DPCCH (dedicated control channel for general uplink communication) corresponding to the received AG (scheduling permission information).
- E-DPDCH dedicated data channel for high-speed uplink communication
- DPCCH dedicated control channel for general uplink communication
- MAC-e PDU uplink data
- it is configured to determine only one mobile station UE to be scheduled for EUL communication (high-speed uplink communication) in each scheduling section, and to determine an AG to be transmitted to the mobile station UE to be scheduled for EUL communication.
- “Zero Grant (first scheduling permission information)” instructing the first mobile station UE # 1 to be scheduled for EUL communication in the current scheduling interval to stop transmission of uplink data in the next scheduling interval.
- the AG transmitter 12 transmits the same “Zero Grant” to the first mobile station UE # 1 a plurality of times before the next scheduling interval starts. It is summarized as follows.
- the scheduling interval is configured by one or a plurality of TTIs (time slots), and the AG transmission unit 12 uses the first mobile station UE # 1 in a plurality of consecutive TTIs. On the other hand, it may be configured to transmit “Zero Grant”.
- the AG transmitter 12 transmits the same AG to the second mobile station UE # 2 a plurality of times when starting or after starting the next scheduling interval. It may be configured.
- the operations of the radio base station NodeB and the mobile station UE described above may be implemented by hardware, may be implemented by a software module executed by a processor, or may be implemented by a combination of both. .
- Software modules include RAM (Random Access Memory), flash memory, ROM (Read Only Memory), EPROM (Erasable Programmable ROM), EEPROM (Electronically Erasable and Programmable, Removable ROM, and Hard Disk). Alternatively, it may be provided in an arbitrary format storage medium such as a CD-ROM.
- the 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. Further, such a storage medium and a processor may be provided in the ASIC. Such an ASIC may be provided in the radio base station NodeB and the mobile station UE. Further, the storage medium and the processor may be provided in the radio base station NodeB and the mobile station UE as discrete components.
- the radio when switching the scheduling target mobile station UE, the radio that can reduce the possibility of reception error of “Zero Grant” in the current scheduling target mobile station UE # 1.
- a base station can be provided.
Abstract
A radio base station (Node B) wherein an AG transmission unit (12) is so configured as to transmit before the start of the next scheduling interval the same "Zero Grant" a plurality of times to a first mobile station (UE#1) being scheduled in the present scheduling interval.
Description
本発明は、無線基地局に関する。
The present invention relates to a radio base station.
「Ｔｉｍｅ ＆ Ｒａｔｅ」方式のＥＵＬ（Ｅｎｈａｎｃｅｄ Ｕｐｌｉｎｋ）通信では、各スケジューリング区間におけるスケジューリング対象の移動局ＵＥは、１つであり、無線基地局ＮｏｄｅＢが、現在のスケジューリング区間におけるスケジューリング対象の移動局ＵＥ＃１に対して、Ｅ-ＡＧＣＨ（Ｅ-ＤＣＨ Ａｂｓｏｌｕｔｅ Ｇｒａｎｔ Ｃｈａｎｎｅｌ）を介して、次のスケジューリング区間において上りデータの送信を停止するように指示する「Ｚｅｒｏ Ｇｒａｎｔ」を送信し、次のスケジューリング区間におけるスケジューリング対象の移動局ＵＥ＃２に対して、Ｅ-ＡＧＣＨを介して、所定のＡＧ（Ａｂｓｏｌｕｔｅ Ｇｒａｎｔ）を送信することによって、スケジューリング対象の移動局を切り替えることができる。
In EUL (Enhanced Uplink) communication of the “Time & Rate” method, there is one scheduling target mobile station UE in each scheduling interval, and the radio base station NodeB is the scheduling target mobile station UE # in the current scheduling interval. 1 is transmitted via E-AGCH (E-DCH Absolute Grant Channel) to instruct to stop transmission of uplink data in the next scheduling interval, and scheduling in the next scheduling interval The mobile station to be scheduled can be switched by transmitting a predetermined AG (Absolute Grant) to the target mobile station UE # 2 via E-AGCH. .
しかしながら、かかる「Ｔｉｍｅ ＆ Ｒａｔｅ」方式のＥＵＬ通信において、移動局ＵＥが、現在のスケジューリング区間におけるスケジューリング対象の移動局ＵＥ＃１が、「Ｚｅｒｏ Ｇｒａｎｔ」の受信に失敗すると、以下の問題点が発生する。
However, in such “Time & Rate” type EUL communication, if the mobile station UE fails to receive “Zero Grant”, the mobile station UE # 1 to be scheduled in the current scheduling section has the following problems. To do.
第１に、次のスケジューリング区間が開始された後は、スケジューリング対象の移動局ＵＥが、移動局ＵＥ＃２に遷移しているため、無線基地局ＮｏｄｅＢは、移動局ＵＥ＃１に対して、「Ｚｅｒｏ Ｇｒａｎｔ」を送信することができないという問題点が発生する。
First, since the scheduling target mobile station UE has transitioned to the mobile station UE # 2 after the start of the next scheduling section, the radio base station NodeB is directed to the mobile station UE # 1. There is a problem that “Zero Grant” cannot be transmitted.
ここで、ＥＵＬ通信では、各ＴＴＩ（Ｔｒａｎｓｍｉｓｓｉｏｎ Ｔｉｍｅ Ｉｎｔｅｒｖａｌ、時間スロット）において、１種類のＡＧしか送信することができない。
Here, in EUL communication, only one type of AG can be transmitted in each TTI (Transmission Time Interval, time slot).
第２に、移動局ＵＥ＃１は、次のスケジューリング区間が開始された後も、上りデータの送信を継続し、かかる上りデータは、無線基地局ＮｏｄｅＢにおいて全て上り干渉となり、本来のスケジューリング対象の移動局ＵＥ＃２における上り伝送速度を高速にすることができなくなるという問題点が発生する。
Secondly, the mobile station UE # 1 continues to transmit uplink data even after the next scheduling section is started. All the uplink data becomes uplink interference in the radio base station NodeB, and the original scheduling target There arises a problem that the uplink transmission rate in the mobile station UE # 2 cannot be increased.
第３に、上述のような状態が、移動局ＵＥ＃１が、再度、スケジューリング対象の移動局ＵＥとなるまで継続するという問題点があった。
Third, there is a problem that the above-described state continues until the mobile station UE # 1 becomes the mobile station UE to be scheduled again.
第１の特徴に係る移動局は、受信したスケジューリング許可情報に対応する高速上り通信用個別データチャネルと一般上り通信用個別制御チャネルとの間の送信電力比に基づいて、該高速上り通信用個別データチャネルを介して送信する上りデータの送信電力を決定するように構成されている移動通信システムで用いられる無線基地局であって、各スケジューリング区間における高速上り通信のスケジューリング対象の移動局を１つだけ決定し、該高速上り通信のスケジューリング対象の移動局に対して送信すべきスケジューリング許可情報を決定するように構成されているスケジューリング部と、高速上り通信のスケジューリング対象の移動局を切り替える際に、現在のスケジューリング区間における高速上り通信のスケジューリング対象の第１移動局に対して、次のスケジューリング区間において上りデータの送信を停止するように指示する第１スケジューリング許可情報を送信し、該次のスケジューリング区間における高速上り通信のスケジューリング対象の第２移動局に対して、前記スケジューリング部によって決定された第２スケジューリング許可情報を送信するように構成されているスケジューリング許可情報送信部とを具備し、前記スケジューリング許可情報送信部は、前記次のスケジューリング区間が開始する前に、前記第１移動局に対して、複数回、同一の前記第１スケジューリング許可情報を送信するように構成されている。
The mobile station according to the first feature is configured to perform the individual transmission for high-speed uplink communication based on the transmission power ratio between the dedicated data channel for high-speed uplink communication and the dedicated control channel for general uplink communication corresponding to the received scheduling permission information. A radio base station used in a mobile communication system configured to determine transmission power of uplink data to be transmitted via a data channel, and one mobile station to be scheduled for high-speed uplink communication in each scheduling section When switching between a scheduling unit configured to determine scheduling permission information to be transmitted to a mobile station targeted for scheduling of high-speed uplink communication and a mobile station targeted for scheduling of high-speed uplink communication, Scheduling pair for high-speed uplink communication in the current scheduling interval Transmitting first scheduling permission information for instructing the first mobile station to stop transmission of uplink data in the next scheduling interval, and second scheduling target for high-speed uplink communication in the next scheduling interval A scheduling permission information transmitting unit configured to transmit second scheduling permission information determined by the scheduling unit to a station, wherein the scheduling permission information transmitting unit has the next scheduling interval Before starting, the same first scheduling permission information is transmitted to the first mobile station a plurality of times.
（本発明の第１の実施形態に係る移動通信システム）
図１を参照して、本発明の第１の実施形態に係る移動通信システムについて説明する。 (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.
図１を参照して、本発明の第１の実施形態に係る移動通信システムについて説明する。 (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.
図１に示すように、本実施形態に係る移動通信システムは、無線基地局ＮｏｄｅＢと、移動局ＵＥとを具備している。本実施形態に係る移動通信システムでは、「Ｔｉｍｅ ＆ Ｒａｔｅ」方式のＥＵＬ通信（高速上り通信）が行われるように構成されている。
As shown in FIG. 1, the mobile communication system according to the present embodiment includes a radio base station NodeB and a mobile station UE. The mobile communication system according to the present embodiment is configured to perform “Time & Rate” type EUL communication (high-speed uplink communication).
本実施形態に係る移動通信システムでは、移動局ＵＥは、例えば、Ｅ-ＤＰＤＣＨ（Ｅ-ＤＣＨ Ｄｅｄｉｃａｔｅｄ Ｐｈｙｓｉｃａｌ Ｄａｔａ Ｃｈａｎｎｅｌ、高速上り通信用個別データチャネル）を介して、高速通信用の上りデータを送信し、Ｅ-ＤＰＣＣＨ（Ｅ-ＤＣＨ Ｄｅｄｉｃａｔｅｄ Ｐｈｙｓｉｃａｌ Ｃｏｎｔｒｏｌ Ｃｈａｎｎｅｌ）を介して、高速通信用の制御信号を送信し、ＤＰＣＣＨ（Ｄｅｄｉｃａｔｅｄ Ｐｈｙｓｉｃａｌ Ｃｏｎｔｒｏｌ Ｃｈａｎｎｅｌ、一般上り通信用個別制御チャネル）を介して、一般通信用の制御信号を送信するように構成されている。
In the mobile communication system according to the present embodiment, the mobile station UE transmits uplink data for high-speed communication via, for example, E-DPDCH (E-DCH Dedicated Physical Data Channel, dedicated data channel for high-speed uplink communication). , A control signal for high-speed communication is transmitted via E-DPCCH (E-DCH Dedicated Physical Control Channel), and for general communication via DPCCH (Dedicated Physical Control Channel, general control channel for general uplink communication) A control signal is transmitted.
また、本実施形態に係る移動通信システムでは、無線基地局ＮｏｄｅＢは、例えば、Ｅ-ＡＧＣＨを介して、ＡＧ（スケジューリング許可情報）を送信するように構成されている。
In addition, in the mobile communication system according to the present embodiment, the radio base station NodeB is configured to transmit AG (scheduling permission information) via, for example, E-AGCH.
ここで、移動局ＵＥは、無線基地局ＮｏｄｅＢから受信したＡＧに対応するＥ-ＤＰＤＣＨ（高速上り通信用個別データチャネル）とＤＰＣＣＨ（一般上り通信用個別制御チャネル）との間の送信電力比に基づいて、Ｅ-ＤＰＤＣＨを介して送信する上りデータ（ＭＡＣ-ｅ ＰＤＵ）の送信電力を決定するように構成されている。
Here, the mobile station UE sets the transmission power ratio between the E-DPDCH (dedicated data channel for high-speed uplink communication) and DPCCH (dedicated control channel for general uplink communication) corresponding to the AG received from the radio base station NodeB. Based on this, it is configured to determine the transmission power of uplink data (MAC-e PDU) to be transmitted via E-DPDCH.
図２に示すように、無線基地局ＮｏｄｅＢは、スケジューリング部１１と、ＡＧ送信部１２とを具備している。
As shown in FIG. 2, the radio base station NodeB includes a scheduling unit 11 and an AG transmission unit 12.
スケジューリング部１１は、各スケジューリング区間におけるＥＵＬ通信のスケジューリング対象の移動局ＵＥ及び当該移動局ＵＥに対して送信すべきＡＧを決定するように構成されている。
The scheduling unit 11 is configured to determine a mobile station UE to be scheduled for EUL communication in each scheduling section and an AG to be transmitted to the mobile station UE.
ここで、各スケジューリング区間は、１つ又は複数のＴＴＩによって構成されている。
Here, each scheduling section is composed of one or a plurality of TTIs.
また、「Ｔｉｍｅ ＆ Ｒａｔｅ」方式のＥＵＬ通信が行われている場合、スケジューリング部１１は、各スケジューリング区間におけるＥＵＬ通信のスケジューリング対象の移動局ＵＥを１つだけ決定し、当該ＥＵＬ通信のスケジューリング対象の移動局ＵＥに対して送信すべきＡＧを決定するように構成されている。
In addition, when “Time & Rate” type EUL communication is performed, the scheduling unit 11 determines only one mobile station UE to be scheduled for EUL communication in each scheduling section, and schedules the EUL communication for the EUL communication. An AG to be transmitted to the mobile station UE is determined.
ＡＧ送信部１２は、各スケジューリング区間におけるスケジューリング対象の移動局ＵＥに対して、スケジューリング部１１によって決定されたＡＧを送信するように構成されている。
The AG transmission unit 12 is configured to transmit the AG determined by the scheduling unit 11 to the mobile station UE to be scheduled in each scheduling section.
「Ｔｉｍｅ ＆ Ｒａｔｅ」方式のＥＵＬ通信が行われている場合、例えば、図３に示すように、ＡＧ送信部１２は、ＥＵＬ通信のスケジューリング対象の移動局ＵＥを切り替える際に、現在のスケジューリング区間におけるＥＵＬ通信のスケジューリング対象の移動局ＵＥ＃１（第１移動局）に対して、次のスケジューリング区間において上りデータの送信を停止するように指示する「Ｚｅｒｏ Ｇｒａｎｔ（第１スケジューリング許可情報）」を送信し、次のスケジューリング区間におけるＥＵＬ通信のスケジューリング対象の移動局ＵＥ＃２（第２移動局）に対して、スケジューリング部１１によって決定された「ＡＧ（第２スケジューリング許可情報）」を送信するように構成されている。
When “Time & Rate” type EUL communication is performed, for example, as illustrated in FIG. 3, when the AG transmission unit 12 switches the mobile station UE to be scheduled for EUL communication, “Zero Grant (first scheduling permission information)” is transmitted to instruct the mobile station UE # 1 (first mobile station) to be scheduled for EUL communication to stop transmission of uplink data in the next scheduling interval. Then, “AG (second scheduling permission information)” determined by the scheduling unit 11 is transmitted to the mobile station UE # 2 (second mobile station) to be scheduled for EUL communication in the next scheduling interval. It is configured.
ここで、図３に示すように、ＡＧ送信部１２は、次のスケジューリング区間（ｔ２からｔ３の区間）が開始する前に、移動局ＵＥ＃１に対して、複数回、同一の「Ｚｅｒｏ Ｇｒａｎｔ」を送信するように構成されている。
Here, as illustrated in FIG. 3, the AG transmission unit 12 performs the same “Zero Grant” for the mobile station UE # 1 a plurality of times before the next scheduling period (the period from t2 to t3) starts. "."
また、ＡＧ送信部１２は、連続する複数のＴＴＩにおいて、移動局ＵＥ＃１に対して、「Ｚｅｒｏ Ｇｒａｎｔ」を送信するように構成されていてもよい。
Further, the AG transmission unit 12 may be configured to transmit “Zero Grant” to the mobile station UE # 1 in a plurality of continuous TTIs.
さらに、ＡＧ送信部１２は、次のスケジューリング区間を開始する際、移動局ＵＥ＃２に対して、複数回、同一のＡＧを送信するように構成されていてもよい。
Further, the AG transmission unit 12 may be configured to transmit the same AG multiple times to the mobile station UE # 2 when starting the next scheduling interval.
なお、ＡＧ送信部１２は、次のスケジューリング区間が開始した後に、移動局ＵＥ＃２に対して、複数回、同一のＡＧを送信するように構成されていてもよい。
The AG transmission unit 12 may be configured to transmit the same AG multiple times to the mobile station UE # 2 after the next scheduling section starts.
本発明の第１の実施形態に係る移動通信システムによれば、「Ｔｉｍｅ ＆ Ｒａｔｅ」方式のＥＵＬ通信が行われている場合、無線基地局ＮｏｄｅＢは、現在のスケジューリング区間におけるスケジューリング対象の移動局ＵＥ＃１が、スケジューリング対象の移動局ＵＥでなくなる前に、複数回、同一の「Ｚｅｒｏ Ｇｒａｎｔ」を送信するように構成されているため、かかる移動局ＵＥ＃１において「Ｚｅｒｏ Ｇｒａｎｔ」の受信に失敗する確率を低減することができる。
According to the mobile communication system according to the first embodiment of the present invention, when the “Time & Rate” type EUL communication is performed, the radio base station NodeB can perform the scheduling of the mobile station UE to be scheduled in the current scheduling interval. Since # 1 is configured to transmit the same “Zero Grant” multiple times before it is no longer the scheduling target mobile station UE, the mobile station UE # 1 fails to receive “Zero Grant” The probability of performing can be reduced.
なお、「Ｔｉｍｅ ＆ Ｒａｔｅ」方式のＥＵＬ通信以外のＥＵＬ通信が行われている場合、図４に示すように、１つのスケジューリング割当区間において、複数の移動局ＵＥ＃１乃至ＵＥ＃３が、スケジューリング対象の移動局ＵＥとなることができるため、各移動局ＵＥ＃１乃至ＵＥ＃３において、「Ｚｅｒｏ Ｇｒａｎｔ」の受信に失敗した場合であっても、無線基地局ＮｏｄｅＢは、「Ｚｅｒｏ Ｇｒａｎｔ」を再送することによって、各移動局ＵＥ＃１乃至ＵＥ＃３における上りデータの送信を停止することができる。
In addition, when EUL communication other than “Time & Rate” type EUL communication is performed, as shown in FIG. 4, a plurality of mobile stations UE # 1 to UE # 3 perform scheduling in one scheduling allocation section. Since it is possible to become the target mobile station UE, the radio base station NodeB sets “Zero Grant” even if reception of “Zero Grant” fails in each of the mobile stations UE # 1 to UE # 3. By retransmitting, transmission of uplink data in each of the mobile stations UE # 1 to UE # 3 can be stopped.
したがって、かかるＥＵＬ通信が行われている場合には、各移動局ＵＥ＃１乃至＃３において「Ｚｅｒｏ Ｇｒａｎｔ」の受信に失敗したことに起因する問題点は、あまり問題にならない。
Therefore, when such EUL communication is performed, the problems caused by the failure to receive “Zero Grant” in each of the mobile stations UE # 1 to # 3 are not a significant problem.
以上に述べた本実施形態の特徴は、以下のように表現されていてもよい。
The features of the present embodiment described above may be expressed as follows.
本実施形態の第１の特徴は、移動局ＵＥが、受信したＡＧ（スケジューリング許可情報）に対応するＥ-ＤＰＤＣＨ（高速上り通信用個別データチャネル）とＤＰＣＣＨ（一般上り通信用個別制御チャネル）との間の送信電力比に基づいて、Ｅ-ＤＰＤＣＨを介して送信する上りデータ（ＭＡＣ-ｅ ＰＤＵ）の送信電力を決定するように構成されている移動通信システムで用いられる無線基地局ＮｏｄｅＢであって、各スケジューリング区間におけるＥＵＬ通信（高速上り通信）のスケジューリング対象の移動局ＵＥを１つだけ決定し、ＥＵＬ通信のスケジューリング対象の移動局ＵＥに対して送信すべきＡＧを決定するように構成されているスケジューリング部１１と、ＥＵＬ通信のスケジューリング対象の移動局ＵＥを切り替える際に、現在のスケジューリング区間におけるＥＵＬ通信のスケジューリング対象の第１移動局ＵＥ＃１に対して、次のスケジューリング区間において上りデータの送信を停止するように指示する「Ｚｅｒｏ Ｇｒａｎｔ（第１スケジューリング許可情報）」を送信し、次のスケジューリング区間におけるＥＵＬ通信のスケジューリング対象の第２移動局ＵＥ＃２に対して、スケジューリング部１１によって決定された「ＡＧ（第２スケジューリング許可情報）」を送信するように構成されているＡＧ送信部１２とを具備し、ＡＧ送信部１２は、次のスケジューリング区間が開始する前に、第１移動局ＵＥ＃１に対して、複数回、同一の「Ｚｅｒｏ Ｇｒａｎｔ」を送信するように構成されていることを要旨とする。
The first feature of the present embodiment is that the mobile station UE receives E-DPDCH (dedicated data channel for high-speed uplink communication) and DPCCH (dedicated control channel for general uplink communication) corresponding to the received AG (scheduling permission information). Is a radio base station NodeB used in a mobile communication system configured to determine the transmission power of uplink data (MAC-e PDU) transmitted via E-DPDCH based on the transmission power ratio between Thus, it is configured to determine only one mobile station UE to be scheduled for EUL communication (high-speed uplink communication) in each scheduling section, and to determine an AG to be transmitted to the mobile station UE to be scheduled for EUL communication. When switching between the scheduling unit 11 and the mobile station UE to be scheduled for EUL communication, “Zero Grant (first scheduling permission information)” instructing the first mobile station UE # 1 to be scheduled for EUL communication in the current scheduling interval to stop transmission of uplink data in the next scheduling interval. Configured to transmit “AG (second scheduling permission information)” determined by the scheduling unit 11 to the second mobile station UE # 2 to be scheduled for EUL communication in the next scheduling interval. The AG transmitter 12 transmits the same “Zero Grant” to the first mobile station UE # 1 a plurality of times before the next scheduling interval starts. It is summarized as follows.
本実施形態の第１の特徴において、スケジューリング区間は、１つ又は複数のＴＴＩ（時間スロット）によって構成されており、ＡＧ送信部１２は、連続する複数のＴＴＩにおいて、第１移動局ＵＥ＃１に対して、「Ｚｅｒｏ Ｇｒａｎｔ」を送信するように構成されていてもよい。
In the first feature of the present embodiment, the scheduling interval is configured by one or a plurality of TTIs (time slots), and the AG transmission unit 12 uses the first mobile station UE # 1 in a plurality of consecutive TTIs. On the other hand, it may be configured to transmit “Zero Grant”.
本実施形態の第１の特徴において、ＡＧ送信部１２は、次のスケジューリング区間を開始する際又は開始した後に、第２移動局ＵＥ＃２に対して、複数回、同一のＡＧを送信するように構成されていてもよい。
In the first feature of the present embodiment, the AG transmitter 12 transmits the same AG to the second mobile station UE # 2 a plurality of times when starting or after starting the next scheduling interval. It may be configured.
なお、上述の無線基地局ＮｏｄｅＢ及び移動局ＵＥの動作は、ハードウェアによって実施されてもよいし、プロセッサによって実行されるソフトウェアモジュールによって実施されてもよいし、両者の組み合わせによって実施されてもよい。
The operations of the radio base station NodeB and the mobile station UE described above may be implemented by hardware, may be implemented by a software module executed by a processor, or may be implemented by a combination of both. .
ソフトウェアモジュールは、ＲＡＭ（Ｒａｎｄｏｍ Ａｃｃｅｓｓ Ｍｅｍｏｒｙ）や、フラッシュメモリや、ＲＯＭ（Ｒｅａｄ Ｏｎｌｙ Ｍｅｍｏｒｙ）や、ＥＰＲＯＭ（Ｅｒａｓａｂｌｅ Ｐｒｏｇｒａｍｍａｂｌｅ ＲＯＭ）や、ＥＥＰＲＯＭ（Ｅｌｅｃｔｒｏｎｉｃａｌｌｙ Ｅｒａｓａｂｌｅ ａｎｄ Ｐｒｏｇｒａｍｍａｂｌｅ ＲＯＭ）や、レジスタや、ハードディスクや、リムーバブルディスクや、ＣＤ-ＲＯＭといった任意形式の記憶媒体内に設けられていてもよい。
Software modules include RAM (Random Access Memory), flash memory, ROM (Read Only Memory), EPROM (Erasable Programmable ROM), EEPROM (Electronically Erasable and Programmable, Removable ROM, and Hard Disk). Alternatively, it may be provided in an arbitrary format storage medium such as a CD-ROM.
かかる記憶媒体は、プロセッサが当該記憶媒体に情報を読み書きできるように、当該プロセッサに接続されている。また、かかる記憶媒体は、プロセッサに集積されていてもよい。また、かかる記憶媒体及びプロセッサは、ＡＳＩＣ内に設けられていてもよい。かかるＡＳＩＣは、無線基地局ＮｏｄｅＢ及び移動局ＵＥ内に設けられていてもよい。また、かかる記憶媒体及びプロセッサは、ディスクリートコンポーネントとして無線基地局ＮｏｄｅＢ及び移動局ＵＥ内に設けられていてもよい。
The 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. Further, such a storage medium and a processor may be provided in the ASIC. Such an ASIC may be provided in the radio base station NodeB and the mobile station UE. Further, the storage medium and the processor may be provided in the radio base station NodeB and the mobile station UE as discrete components.
以上、上述の実施形態を用いて本発明について詳細に説明したが、当業者にとっては、本発明が本明細書中に説明した実施形態に限定されるものではないということは明らかである。本発明は、特許請求の範囲の記載により定まる本発明の趣旨及び範囲を逸脱することなく修正及び変更態様として実施することができる。従って、本明細書の記載は、例示説明を目的とするものであり、本発明に対して何ら制限的な意味を有するものではない。
As described above, the present invention has been described in detail using the above-described embodiments. However, it is obvious for those skilled in the art that the present invention is not limited to the embodiments described in the present 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.
以上説明したように、実施形態によれば、スケジューリング対象の移動局ＵＥの切り替え時に、現在のスケジューリング対象の移動局ＵＥ＃１における「Ｚｅｒｏ Ｇｒａｎｔ」の受信誤りの可能性を低減させることができる無線基地局を提供することができる。
As described above, according to the embodiment, when switching the scheduling target mobile station UE, the radio that can reduce the possibility of reception error of “Zero Grant” in the current scheduling target mobile station UE # 1. A base station can be provided.
Claims (3)
- 移動局が、受信したスケジューリング許可情報に対応する高速上り通信用個別データチャネルと一般上り通信用個別制御チャネルとの間の送信電力比に基づいて、該高速上り通信用個別データチャネルを介して送信する上りデータの送信電力を決定するように構成されている移動通信システムで用いられる無線基地局であって、
各スケジューリング区間における高速上り通信のスケジューリング対象の移動局を１つだけ決定し、該高速上り通信のスケジューリング対象の移動局に対して送信すべきスケジューリング許可情報を決定するように構成されているスケジューリング部と、
高速上り通信のスケジューリング対象の移動局を切り替える際に、現在のスケジューリング区間における高速上り通信のスケジューリング対象の第１移動局に対して、次のスケジューリング区間において上りデータの送信を停止するように指示する第１スケジューリング許可情報を送信し、該次のスケジューリング区間における高速上り通信のスケジューリング対象の第２移動局に対して、前記スケジューリング部によって決定された第２スケジューリング許可情報を送信するように構成されているスケジューリング許可情報送信部とを具備し、
前記スケジューリング許可情報送信部は、前記次のスケジューリング区間が開始する前に、前記第１移動局に対して、複数回、同一の前記第１スケジューリング許可情報を送信するように構成されていることを特徴とする無線基地局。 The mobile station transmits via the dedicated data channel for high-speed uplink communication based on the transmission power ratio between the dedicated data channel for high-speed uplink communication and the dedicated control channel for general uplink communication corresponding to the received scheduling permission information. A radio base station used in a mobile communication system configured to determine transmission power of uplink data to be
A scheduling unit configured to determine only one mobile station to be scheduled for high-speed uplink communication in each scheduling interval and to determine scheduling permission information to be transmitted to the mobile station to be scheduled for high-speed uplink communication When,
When switching mobile stations to be scheduled for high-speed uplink communication, instruct the first mobile station to be scheduled for high-speed uplink communication in the current scheduling section to stop transmission of uplink data in the next scheduling section The first scheduling permission information is transmitted, and the second scheduling permission information determined by the scheduling unit is transmitted to the second mobile station to be scheduled for high speed uplink communication in the next scheduling section. A scheduling permission information transmitting unit,
The scheduling permission information transmitting unit is configured to transmit the same first scheduling permission information to the first mobile station a plurality of times before the next scheduling section starts. A featured radio base station. - 前記スケジューリング区間は、１つ又は複数の時間スロットによって構成されており、
前記スケジューリング許可情報送信部は、連続する複数の時間スロットにおいて、前記第１移動局に対して、前記第１スケジューリング許可情報を送信するように構成されていることを特徴とする請求項１に記載の無線基地局。 The scheduling interval is composed of one or more time slots;
2. The scheduling permission information transmitting unit is configured to transmit the first scheduling permission information to the first mobile station in a plurality of continuous time slots. Wireless base station. - 前記スケジューリング許可情報送信部は、前記次のスケジューリング区間を開始する際又は開始した後に、前記第２移動局に対して、複数回、同一の前記第２スケジューリング許可情報を送信するように構成されていることを特徴とする請求項１又は２に記載の無線基地局。 The scheduling permission information transmitting unit is configured to transmit the same second scheduling permission information a plurality of times to the second mobile station when or after starting the next scheduling section. The radio base station according to claim 1 or 2, wherein
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