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WO2012005335A1 - Procédé de communication mobile et station de base sans fil - Google Patents

Procédé de communication mobile et station de base sans fil Download PDF

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Publication number
WO2012005335A1
WO2012005335A1 PCT/JP2011/065613 JP2011065613W WO2012005335A1 WO 2012005335 A1 WO2012005335 A1 WO 2012005335A1 JP 2011065613 W JP2011065613 W JP 2011065613W WO 2012005335 A1 WO2012005335 A1 WO 2012005335A1
Authority
WO
WIPO (PCT)
Prior art keywords
relay node
base station
random access
preamble
radio base
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2011/065613
Other languages
English (en)
Japanese (ja)
Inventor
康史 森岡
秀明 高橋
幸彦 奥村
幹生 岩村
曉 山田
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NTT Docomo Inc
Original Assignee
NTT Docomo Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by NTT Docomo Inc filed Critical NTT Docomo Inc
Publication of WO2012005335A1 publication Critical patent/WO2012005335A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/002—Transmission of channel access control information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H04W74/0833—Random access procedures, e.g. with 4-step access
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H04W74/0833—Random access procedures, e.g. with 4-step access
    • H04W74/0838—Random access procedures, e.g. with 4-step access using contention-free random access [CFRA]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W84/00—Network topologies
    • H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
    • H04W84/04—Large scale networks; Deep hierarchical networks
    • H04W84/042—Public Land Mobile systems, e.g. cellular systems
    • H04W84/047—Public Land Mobile systems, e.g. cellular systems using dedicated repeater stations

Definitions

  • the present invention relates to a mobile communication method and a radio base station.
  • FIG. 11 shows a “contention based Random Access procedure” defined by 3GPP.
  • Step 1 the mobile station UE transmits “Random Access (RA) Preamble” to the radio base station eNB.
  • Step 2 the radio base station eNB Then, “Random Access (RA) Response” is transmitted to the mobile station UE.
  • RA Random Access
  • step 3 the mobile station UE transmits “Schedule Transmission” to the radio base station eNB, and in step 4, the radio base station eNB transmits “Contention Resolution” to the mobile station UE.
  • the mobile station UE is configured to be able to connect to the radio base station DeNB via the relay node RN.
  • the relay node RN is also configured to execute the above-described RA procedure with the radio base station DeNB, similarly to the mobile station UE.
  • the relay node RN when the relay node RN operates as “Half Duplex inband relay”, the relay node RN transmits a signal to the mobile station UE in a subframe other than the MBSFN (MBMS Single Frequency Network) subframe, and in the MBSFN subframe.
  • the mobile station UE is configured not to transmit a signal.
  • the radio base station DeNB needs to transmit “RA Response” in the MBSFN subframe to the relay node RN in order to avoid interference.
  • the present invention has been made in view of the above-described problems, and provides a mobile communication method and a radio base station that allows the radio base station DeNB to grasp the transmission source of the received “RA Preamble”. With the goal.
  • a first feature of the present invention is a mobile communication method in which a radio base station transmits broadcast information including mobile station generation information and relay node generation information, and the mobile station receives the notification.
  • a second feature of the present invention is a mobile communication method in which a radio base station transmits broadcast information indicating a relay node random access preamble range, and the relay node includes the relay node random access preamble range. Transmitting a random access preamble to the radio base station, and determining whether the radio base station is a mobile station or a relay node from which the random access preamble is received. It is summarized as having.
  • a third feature of the present invention is a radio base station, which is configured to transmit broadcast information including mobile station generation information and relay node generation information, and received random access And a determination unit configured to determine whether the preamble transmission source is a mobile station or a relay node.
  • the fourth feature of the present invention is a radio base station, which is configured to transmit broadcast information indicating a relay node random access preamble range, and to transmit the received random access preamble.
  • the gist of the present invention is to include a determination unit configured to determine whether the source is a mobile station or a relay node.
  • the radio base station DeNB can grasp the transmission source of the received “RA Preamble”.
  • 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 illustrating an example of a format of an information element “PRACH-Config” in the SIB transmitted by the radio base station according to the first embodiment of the present invention.
  • FIG. 4 is a functional block diagram of the relay node according to the first embodiment of the present invention.
  • FIG. 5 is a flowchart showing the operation of the mobile communication system according to the first embodiment of the present invention.
  • FIG. 6 is a sequence diagram showing operations of the mobile communication system according to the first embodiment of the present invention.
  • FIG. 7A and 7B are diagrams for explaining the RN preamble assigned by the radio base station according to the second embodiment of the present invention.
  • FIG. 8 is a diagram illustrating an example of a format of an information element “RACH-ConfigCommon” in the SIB transmitted by the radio base station according to the first embodiment of the present invention.
  • FIG. 9 is a flowchart showing an operation of the mobile communication system according to the second embodiment of the present invention.
  • FIG. 10 is a sequence diagram showing operations of the mobile communication system according to the second embodiment of the present invention.
  • FIG. 11 is a diagram for explaining problems of a conventional mobile communication system.
  • the mobile communication system is an LTE-Advanced mobile communication system, and includes a radio base station DeNB and a relay node RN.
  • the radio base station DeNB and the relay node RN are connected by a Un interface
  • the relay node RN and the mobile station UE are connected by an RN-Uu interface.
  • the radio base station DeNB includes a broadcast information transmission unit 11, an RA procedure execution unit 12, and a determination unit 13.
  • the broadcast information transmitting unit 11 is configured to transmit MIB (Master Information Block) and SIB (System Information Block) as broadcast information to the subordinate cells.
  • MIB Master Information Block
  • SIB System Information Block
  • the broadcast information transmitting unit 11 is configured to transmit an SIB including RACH_ROOT_SEQUENCE for the mobile station UE and RACH_ROOT_SEQUENCE for the relay node RN.
  • the broadcast information transmission unit 11 sets RACH_ROOT_SEQUENCE for the mobile station UE in the information element “rootSequenceIndex” in the information element “PRACH-Config” in the SIB, and the information element “PRACH in the SIB
  • the relay node RN RACH_ROOT_SEQUENCE is set in the information element “rootSequenceIndexRN” in “-Config”.
  • the RA procedure execution unit 12 is configured to perform an RA procedure between the mobile station UE and the relay node RN.
  • the determination unit 13 is configured to determine whether the transmission source of the “RA Preamble” received by the RA procedure execution unit 12 is the mobile station UE or the relay node RN.
  • the determination unit 13 examines the RACH_ROOT_SEQUENCE used for generating the above-mentioned “RA Preamble” to determine whether the transmission source of the “RA Preamble” is the mobile station UE or the relay node RN. It may be configured to determine.
  • the determination unit 13 manages a table associating “RA Preamble” with RACH_ROOT_SEQUENCE. With reference to this table, whether the above-mentioned “RA Preamble” is transmitted from the mobile station UE or the relay node RN. It may be configured to determine whether there is.
  • the RA procedure execution unit 12 performs the relay node RN in the MBSFN subframe (backhaul subframe). Is configured to transmit "RA Response”.
  • the relay node RN includes a notification information receiving unit 21 and an RA procedure execution unit 22.
  • the broadcast information receiving unit 21 is configured to receive broadcast information transmitted by the radio base station DeNB.
  • the RA procedure execution unit 22 is configured to perform an RA procedure with the radio base station DeNB.
  • the RA procedure execution unit 22 generates “RA Preamble” based on the RACH_ROOT_SEQUENCE for the relay node RN included in the SIB received by the broadcast information reception unit 21, and transmits it to the radio base station DeNB. It is configured.
  • the relay node RN when the relay node RN operates as “Half Duplex inband relay”, the relay node RN transmits a signal to the mobile station UE in a subframe other than the MBSFN subframe, and in the MBSFN subframe, to the mobile station UE. It is assumed that no signal is transmitted.
  • step S1001 the radio base station DeNB sets RACH_ROOT_SEQUENCE for the mobile station UE in the information element “rootSequenceIndex” in the information element “PRACH-Config”, and sets the information element “rootSequenceIndex” in the information element “PRACH-ConfigIndex”. SIB in which RACH_ROOT_SEQUENCE for node RN is set is transmitted.
  • step S1002A the relay node RN determines whether or not it is operating as “relay”, specifically, “Half Duplex inband relay”.
  • step S1002B When it is determined that the relay node RN operates as “relay”, specifically, “Half Duplex inband relay”, in step S1002B, based on the RACH_ROOT_SEQUENCE for the relay node RN included in the SIB, “RA "Preamble” is generated.
  • step S1002C if it is determined that the relay node RN is not operating as “relay”, that is, is operating as “UE”, in step S1002C, based on the RACH_ROOT_SEQUENCE for the mobile station UE included in the SIB, "Preamble" is generated.
  • step S1002D the relay node RN transmits the generated “RA Preamble” to the radio base station DeNB.
  • step S1003A the radio base station DeNB determines whether the transmission source of the received “RA Preamble” is the mobile station UE or the relay node RN.
  • the radio base station DeNB transmits “RA Response” to the relay node RN in the MBSFN subframe in Step S1003B.
  • the radio base station DeNB determines that the transmission source of the received “RA Preamble” is the mobile station UE, in step S1003C, the radio base station DeNB performs “RA Response” to the mobile station UE in a normal subframe. Send.
  • step S1004 the relay node RN transmits “Schedule Transmission” to the radio base station eNB, and in step S1005, the radio base station eNB transmits “Contention Resolution” to the relay node RN.
  • the radio base station eNB checks the RACH_ROOT_SEQUENCE used to generate the received “RA Preamble” so that the transmission source of the “RA Preamble” is the mobile station UE or the relay. It can be determined which of the nodes RN is.
  • Mobile communication system according to the second embodiment of the present invention A mobile communication system according to the second embodiment of the present invention will be described with reference to FIG. 7 to FIG. Hereinafter, the mobile communication system according to the present embodiment will be described by focusing on differences from the mobile communication system according to the first embodiment described above.
  • RA Preambles are divided by two parameters “numberOfRA-Preambles” and “numberOfRA-PreamblesGroupA”.
  • RA Preamble # 0” to “RA Preamble # 60” are reserved as “RA Preamble” for contention, and “RA Preamble # 61” to “RA Preamble # 63”. Is secured as “RA Preamble” for non-contention.
  • RA Preamble # 0 to “RA Preamble # 47” are reserved as “RA Preamble” for transmission with small power
  • RA Preamble # 48 ⁇ “RA Preamble # 60” is secured as “RA Preamble” for transmission with large power.
  • the 64 “RA Preambles” include three parameters “numberOfRA-Preambles”, “numberOfRA-PreamblesRN”, and “ numberOfRA-PreamblesGroupA ".
  • RA Preamble # 0” to “RA Preamble # 32” are reserved as “RA Preamble” for contention (“RA Preamble” for mobile station UE), and “RA Preamble # 32” “Preamble # 33” to “RA Preamble # 60” are reserved as “RA Preamble” for contention (“RA Preamble” for relay node RN), and “RA Preamble # 61” to “RA Preamble # 63” Is secured as “RA Preamble” for non-contention.
  • numberOfRA-PreamblesRN is a parameter indicating the range “RA Preamble # 33” to “RA Preamble # 60” of “RA Preamble” for RN.
  • the broadcast information transmission unit 11 sets the range of “RA Preamble” for the UE in the information element “numberOfRA-Preambles” in the information element “RACH-ConfigCommon” in the SIB, and
  • the range of “RA Preamble” for RN is set in the information element “numberOfRA-PreamblesRN” in the information element “RACH-ConfigCommon”.
  • the determination unit 13 is configured to determine whether the transmission source of the “RA Preamble” is the mobile station UE or the relay node RN based on the range to which the received “RA Preamble” belongs. .
  • the relay node RN when the relay node RN operates as “Half Duplex inband relay”, the relay node RN transmits a signal to the mobile station UE in a subframe other than the MBSFN subframe, and in the MBSFN subframe, to the mobile station UE. It is assumed that no signal is transmitted.
  • step S2001 the radio base station DeNB sets a range of “RA Preamble” for the UE in the information element “numberOfRA-Preambles” in the information element “RACH-ConfigCommon”, and information in the information element “RACH-ConfigCommon” An SIB in which the range of “RA Preamble” for RN is set in the element “numberOfRA-PreamblesRN” is transmitted.
  • step S2002A the relay node RN determines whether or not it is operating as “relay”, specifically, “Half Duplex inband relay”.
  • the relay node RN When it is determined that the relay node RN is operating as “relay”, specifically, “Half Duplex inband relay”, in step S2002B, the relay node RN is within the range of “RA Preamble” for the RN included in the SIB. “RA Preamble” is generated.
  • step S2002C when it is determined that the relay node RN is not operating as “relay”, that is, is operating as “UE”, in step S2002C, the “RA Preamble” for the UE included in the SIB included in the SIB. “RA Preamble” within the range of is generated.
  • step S2002D the relay node RN transmits the generated “RA Preamble” to the radio base station DeNB.
  • step S2003A the radio base station DeNB determines whether the transmission source of the received “RA Preamble” is the mobile station UE or the relay node RN.
  • the radio base station DeNB transmits “RA Response” to the relay node RN in the MBSFN subframe.
  • the radio base station DeNB transmits “RA Response” to the mobile station UE in a normal subframe.
  • step S2004 the relay node RN transmits “Schedule Transmission” to the radio base station eNB, and in step S2005, the radio base station eNB transmits “Contention Resolution” to the relay node RN.
  • the radio base station eNB checks the range to which the received “RA Preamble” belongs, so that the source of the “RA Preamble” is either the mobile station UE or the relay node RN. Can be determined.
  • the first feature of the present embodiment is a mobile communication method, in which the radio base station DeNB includes RACH_ROOT_SEQUENCE for mobile station UE (generation information for mobile station) and RACH_ROOT_SEQUENCE for relay node RN (generation information for relay node).
  • RA Preamble random access preamble
  • the radio base station De B is the sender of the received "RA Preamble” is summarized in that and a step of determining for whether it is a mobile station UE or the relay node EN.
  • a second feature of the present embodiment is a mobile communication method in which the radio base station DeNB transmits an SIB indicating a range of “RA Preamble” for RN (random access preamble range for relay node);
  • the relay node RN transmits the “RA Preamble” within the range of “RA Preamble” for the RN to the radio base station DeNB, and the source of the “RA Preamble” received by the radio base station DeNB And a step of determining whether the mobile station UE or the relay node RN.
  • the relay node RN transmits a signal to the mobile station UE in a subframe other than the MBSFN subframe, and the “RA” received by the radio base station DeNB
  • a step of transmitting “RA Response (random access response)” to the relay node RN in the MBSFN subframe may be included.
  • a third feature of the present embodiment is a radio base station DeNB, which is received by a broadcast information transmitter 11 configured to transmit an SIB including RACH_ROOT_SEQUENCE for the mobile station UE and RACH_ROOT_SEQUENCE for the relay node RN.
  • the gist of the present invention is to include a determination unit 13 configured to determine whether the transmission source of “RA Preamble” is the mobile station UE or the relay node RN.
  • the fourth feature of the present embodiment is a radio base station DeNB, which is configured to transmit an SIB indicating the range of “RA Preamble” for RN, and the received “RA
  • the gist of the invention is that it includes a determination unit 13 configured to determine whether the transmission source of “Preamble” is the mobile station UE or the relay node RN.
  • RA procedure execution unit 12 random access procedure execution unit configured to transmit “RA Response”
  • RA Response a signal addressed to mobile station UE
  • the operations of the radio base station DeNB, the relay node RN, and the mobile station UE described above may be performed by hardware, may be performed by a software module executed by a processor, or may be performed by a combination of both. May be.
  • the software modules include RAM (Random Access Memory), flash memory, ROM (Read Only Memory), EPROM (Erasable Programmable ROM), EEPROM (Electronically Erasable and Programmable, Removable ROM, Hard Disk, and Removable ROM).
  • RAM Random Access Memory
  • flash memory ROM (Read Only Memory)
  • EPROM Erasable Programmable ROM
  • EEPROM Electrically Erasable and Programmable, Removable ROM, Hard Disk, and Removable ROM.
  • it may be provided in a storage medium of an arbitrary format 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. Such a storage medium and processor may be provided in the ASIC. Such an ASIC may be provided in the radio base station DeNB, the relay node RN, or the mobile station UE. Further, the storage medium and the processor may be provided in the radio base station DeNB, the relay node RN, and the mobile station UE as discrete components.
  • UE ... mobile station DeNB ... radio base station RN ... relay node 11 ... notification information transmission unit 12, 22 ... RA procedure execution unit 13 ... determination unit 21 ... notification information reception unit

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

Abstract

Un procédé de communication mobile se déroule de la manière suivante : une station mobile (UE) génère un « préambule RA » sur la base d'une SEQUENCE_RACINE_RACH pour les stations mobiles (UE) contenue dans un SIB reçu, et elle transmet ledit « préambule RA » à une station de base sans fil (DeNB); un noeud relais (RN) génère un « préambule RA » sur la base d'une SEQUENCE_RACINE_RACH pour les noeuds relais (RN) contenue dans un SIB reçu, et il transmet ce « préambule RA » à la station de base sans fil (DeNB); et la station de base sans fil (DeNB) détermine si la source de la transmission du « préambule RA » reçu est la station mobile (UE) ou le noeud relais (RN).
PCT/JP2011/065613 2010-07-08 2011-07-07 Procédé de communication mobile et station de base sans fil Ceased WO2012005335A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2010-155860 2010-07-08
JP2010155860A JP5097245B2 (ja) 2010-07-08 2010-07-08 移動通信方法及び無線基地局

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WO2012005335A1 true WO2012005335A1 (fr) 2012-01-12

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PCT/JP2011/065613 Ceased WO2012005335A1 (fr) 2010-07-08 2011-07-07 Procédé de communication mobile et station de base sans fil

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Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018164885A1 (fr) * 2017-03-10 2018-09-13 Kyocera Corporation Transmissions de communication de type machine (mtc) à rach en masse

Citations (4)

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Publication number Priority date Publication date Assignee Title
WO2008087941A1 (fr) * 2007-01-19 2008-07-24 Ntt Docomo, Inc. Dispositif de station de base, station mobile, système de communication mobile et procédé de commande de communication
JP2009213057A (ja) * 2008-03-06 2009-09-17 Panasonic Corp 無線基地局装置、無線端末装置、無線中継局装置、送信パワー制御方法、無線通信中継方法および無線通信システム
WO2009116407A1 (fr) * 2008-03-21 2009-09-24 シャープ株式会社 Dispositif de station mobile et procédé de retransmission
WO2009157124A1 (fr) * 2008-06-25 2009-12-30 パナソニック株式会社 Dispositif de station de base radio, dispositif de station relais radio et dispositif de terminal radio

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Publication number Priority date Publication date Assignee Title
WO2008087941A1 (fr) * 2007-01-19 2008-07-24 Ntt Docomo, Inc. Dispositif de station de base, station mobile, système de communication mobile et procédé de commande de communication
JP2009213057A (ja) * 2008-03-06 2009-09-17 Panasonic Corp 無線基地局装置、無線端末装置、無線中継局装置、送信パワー制御方法、無線通信中継方法および無線通信システム
WO2009116407A1 (fr) * 2008-03-21 2009-09-24 シャープ株式会社 Dispositif de station mobile et procédé de retransmission
WO2009157124A1 (fr) * 2008-06-25 2009-12-30 パナソニック株式会社 Dispositif de station de base radio, dispositif de station relais radio et dispositif de terminal radio

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Title
"Texas Instruments", 3GPP TSG RAN WG1 #55BIS RL-090290, 12 January 2009 (2009-01-12) *
NTT DOCOMO, INC.: "Open issues on RLF handling for relay", 3GPP TSG-RAN WG2 #70 R2-103014, 10 May 2010 (2010-05-10) *
SAMSUNG: "Selection of the proper root sequence index for RACHO", 3GPP TSG RAN WG2#67BIS R2-095976, 12 October 2009 (2009-10-12) *

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