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WO2008019625A1 - Procédé et système et station de base pour transfert intercellulaire de communications mobiles - Google Patents

Procédé et système et station de base pour transfert intercellulaire de communications mobiles Download PDF

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Publication number
WO2008019625A1
WO2008019625A1 PCT/CN2007/070466 CN2007070466W WO2008019625A1 WO 2008019625 A1 WO2008019625 A1 WO 2008019625A1 CN 2007070466 W CN2007070466 W CN 2007070466W WO 2008019625 A1 WO2008019625 A1 WO 2008019625A1
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WO
WIPO (PCT)
Prior art keywords
dch
link
information
service
mobile communication
Prior art date
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Application number
PCT/CN2007/070466
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English (en)
Chinese (zh)
Inventor
Hui Zhi
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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Filing date
Publication date
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Publication of WO2008019625A1 publication Critical patent/WO2008019625A1/fr
Anticipated expiration legal-status Critical
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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0055—Transmission or use of information for re-establishing the radio link

Definitions

  • a wireless network related to cell handover includes a radio network controller (RNC) 110, a node (NODEB, a base station of a WCDMA system) 120, and a user terminal under the node 120 (UE, User). Equipment ) 140.
  • RNC radio network controller
  • NODEB node
  • UE User
  • Equipment Equipment
  • a prior art handover scenario that is, a process of DCH/E-DCH (Dedicated Channel/Enhanced UL DCH, Enhanced Uplink Dedicated Channel) service switching between cells 130 includes the following steps:
  • UE 140 establishes a radio link (RL) 0 through a signaling process established by a radio link under CELLO (CELL, WCDMA system under WCDMA system) of NODEB0, where CELLO supports DCH and E-DCH.
  • CELLO CELL, WCDMA system under WCDMA system
  • CELLO supports DCH and E-DCH.
  • the specific services carried on the RL0 are: 3.4K+64K (downstream only) + High Speed Uplink Packet Access (HSUPA, High Speed Uplink Packet Access), including DCH service: 3.4 K+64K (downstream only) , also includes E-DCH services: HSUPA;
  • the UE 140 moves to the CELLO signal of NODEB0 and the CELL1 signal of NODEB1 in the common coverage area, and establishes RL1 through the signaling process established by the radio link under CELL1 of NODEB1, where CELL1 only supports DCH service; CELL1 only supports DCH services. Therefore, the specific service carried on RL1 is DCH: 3.4K+64K (downstream only).
  • UE 140 has two radio links, RL0 and RL1.
  • the DCH data of the two radio links is in NODEB1 is soft Merging; the soft combining means that the radio link is selected on the RNC 110 side;
  • RL2 is added by the signaling procedure added by the radio link under CELL2 of NODEB 1, where CELL2 supports DCH and E-DCH services; For:
  • CELL2 and UE 140 detect respective signals
  • CELL2 and UE 140 report the respective detection results of RNC 110 through NODEB 1; c.
  • RNC 110 sends a request to increase link RL2 to NODEB 1; d, NODEB1 adds link RL2, and links the link establishment result through RL ADDITION signaling The process tells the RNC 110 that the RNC 110 is in communication control accordingly.
  • the RNC 110 deletes RL0 and RL1, and the UE 140 only has the RL2 radio link.
  • RNC 110 requests NODEB1 to carry E-DCH services on the newly added RL2, so RL2
  • the specific services carried are: 3.4K+64K (downstream only) +HSUPA.
  • UE 140 has three radio links: RL0, RL1, and RL2. Among them, RL0 is softly combined with RL1 and RL2, and RL1 and RL2 are respectively.
  • the DCH performs softer combining, which means that the wireless links are combined on the NODEB side, merged into one link, and sent to the RNC 110.
  • the sub-step d in step 203 is specifically increased by the radio link sent to the RNC 110 in NODEB1 (RADIO LINK ADDITION RESPONSE)
  • the information is sent to the RNC 110 to report softer merge information about the new E-DCH service and the DCH service.
  • the CHOICE Diversity Indication field in the RADIO LINK ADDITION RESPONSE message sent by the NODEB1 to the RNC 110 is selected to select the corresponding enhanced uplink dedicated channel frequency division multiplexing information response (E-DCH).
  • E-DCH enhanced uplink dedicated channel frequency division multiplexing information response
  • FDD Information Response Non-combining of the information, so that the RNC 110 knows that the UE 140 wants to establish a link and performs E-DCH service on the link.
  • the CHOICE Diversity Indication field needs to be selected.
  • the RL ID's Combining so that the RNC 110 knows that the UE 140 is to perform a softer merging of the DCH part;
  • Table 1 RADIO LINK ADDITION RESPONSE message structure
  • the symbol “>” indicates a first-level field, followed by the symbol “>, the symbol “"” indicates the second-level field of this first-level field, the same reason, the symbol “">”represents the corresponding two The third-level field of the level field.
  • the CHOICE Diversity Indication field there are two secondary fields, Combining and Non Combining.
  • the two-level fields respectively have radio link identifier (RL ID) and DCH information response.
  • DCH Information Response A three-level field, where the Combining field is used to tell the RNC to softer the merge situation, and Non Combining is used to tell the RNC DCH/E-DCH to create/add new conditions.
  • the CHOICE Diversity Indication field Only one secondary field can be selected, that is, Combining or Non Combining. That is, only one item can be selected in the CHOICE Diversity Indication field: Combining or Non Combining; but in this case, the CHOICE Diversity Indication field will be filled in any case.
  • the HSUPA service corresponding to the E-DCH of the UE 140 is interrupted; if the CHOICE Diversity Indication field is in step 203 For Non Combining, NODEBl cannot fill in the DCH Information Response cell, causing NODEB1 to increase RL2 failure.
  • UE 140 does not have a radio link, and the service of the entire UE 140 is interrupted.
  • the process of the device performing DCH/E-DCH service switching between cells is not limited to the above, and the above technical problem may exist in the case where softer combining is required and the RNC needs to be reported to establish related services.
  • the RADIO LINK ADDITION RESPONSE structure of the current 433 protocol is defective, and the NODEB cannot correctly inform the RNC of the link status of the current user, so that the signaling processing of the IUB port (the interface between the RNC and the Node B) is incorrect.
  • An embodiment of the present invention provides a method for handover of mobile communication, and a system for switching S-force communication, and a base station for improving handover success rate of mobile communication.
  • the technical solution of the embodiment of the present invention includes: a method for handover of a mobile communication, where the method includes: adding, according to a first link that only carries a DCH service, a second link that carries a DCH and an E-DCH service; Performing softer combining on the DCH services of the first link and the second link; notifying the DCH softer combining information and adding the E-DCH service information to the radio network controller, where the radio network controller receives the The information is controlled by communication.
  • a mobile communication system includes a first base station and a radio network controller, where the first base station has a first link that only carries a DCH service, and adds a second link that carries a DCH and an E-DCH service. And softening the DCH service of the first link and the second link; and softening the combined information of the DCH and adding the E-DCH service information to the radio network controller; and using the radio network controller The communication control is performed based on the received information.
  • a base station comprising: a link management unit, configured to be controlled by a radio network controller, manage a first link that only carries a DCH service, and add a second link that carries a DCH and an E-DCH service,
  • a softer merging unit configured to perform softer combining on the DCH services of the first link and the second link
  • the handover information generating unit is configured to notify the radio network controller of the DCH softer merge information and the E-DCH service information.
  • FIG. 1 is a schematic diagram of a mobile communication switching scenario in the prior art
  • FIG. 2 is a flow chart of mobile communication switching according to the scenario shown in FIG. 1.
  • FIG. 3 is a schematic diagram of a mobile communication system according to an embodiment of the present invention
  • 4 is a flowchart of a mobile communication switching method according to an embodiment of the present invention.
  • the embodiment of the present invention changes an existing protocol, and notifies the RNC by means of RL ADDITION signaling, that is, simultaneously notifies.
  • the RNC softer combines and establishes E-DCH service related information, specifically by notifying the wireless network control by carrying the DCH softer merge information belonging to different first level fields and adding E-DCH service information in the RADIO LINK ADDITION RESPONSE message. Device.
  • the present invention is schematically illustrated by the following embodiments to illustrate how the present invention can be implemented where more soft combining is required and where the RNC is required to establish related services.
  • the embodiment relates to a scenario in which a UE performs mobile communication switching between two different NODEBs, wherein the CELL under the first NODEB supports DCH and E-DCH (referred to as DCH/E-DCH, the same below) service,
  • DCH/E-DCH the same below
  • Two NODEBs include two CELLs, one of which supports only DCH services, and the other CELL supports DCH/E-DCH services.
  • an implementation manner of the mobile communication switching method according to the embodiment of the present invention is a process in which the UE 340 performs DCH/E-DCH service switching between the cells 330.
  • the UE 340 performs mobile communication switching between two different NODEBs 321, 322, which are controlled by the RNC 310.
  • the embodiment includes the steps of:
  • the UE 340 establishes RL0 in the signaling process established by the radio link under the CELLO of the NODEB 321, where the CELLO supports the DCH and the E-DCH service;
  • the specific service carried on the RL0 is: 3.4K+ 64K (downstream only) + HSUPA, including DCH service: 3.4 K+64K (downstream only), also includes E-DCH service: HSUPA;
  • UE 340 moves to the CELLO signal of NODEB 322 and the CELLO signal of NODEB 321 in the common coverage area, and establishes RL1 through the signaling process established by the radio link under CELL1 of NODEB 322, where CELL1 only supports DCH. Service; Since CELL1 only supports DCH services, the specific service carried on RL1 is DCH: 3.4K+64K (downstream only). At this time, UE 340 has two radio links, RL0 and RL1, and the two wireless links. DCH data is soft merged at NODEB 322;
  • RL2 is added by the signaling procedure added by the radio link under CELL2 of NODEB 322, where CELL2 supports DCH and E-DCH services; the specific process of adding RL2 For:
  • CELL2 and UE 340 report the respective detection results of the RNC 310 through the NODEB 322;
  • the RNC 310 sends a request to the NODEB 322 to increase the link RL2;
  • NODEB 322 adds link RL2;
  • the link establishment result is notified to the RNC 310 by carrying the DCH softer merge information and the added E-DCH service information belonging to different first level fields in the RADIO LINK ADDITION RESPONSE message, and the RNC 310 performs communication accordingly.
  • the RNC 310 deletes RL0 and RL1, and successfully retains RL2, and the HSUPA service is not interrupted.
  • the RNC 310 requests the NODEB 322 to carry the E-DCH service on the newly added RL2. Therefore, the specific service carried on the RL2 is: 3.4K+64K (downstream only) +HSUPA, this
  • the UE 340 has three radio links RL0, RL1, and RL2 at the same time; wherein, RL0 performs soft combining with DCH and RL1, respectively, and DCH of RL1 and RL2 performs soft combining.
  • the sub-step 403f in step 403 specifically sends a RADIO LINK ADDITION RESPONSE message sent by the NODEB 322 to the RNC 310 to tell the RNC 310 about softer merge information about the new E-DCH service and the DCH service.
  • E-DCH FDD Information Response first level field used to inform the RNC E-DCH to create/add new conditions, in this embodiment, to inform the RNC 310 that the UE 340 wants to establish a link and perform E-DCH service on the link.
  • the location of the E-DCH FDD Information Response is separated from the Non Combining of the CHOICE Diversity Indication to be parallel with the location of the CHOICE Diversity Indication.
  • the DCH merge/non-merge of the RL is independent of the E-DCH new/new information, and the DCH merge is represented by the CHOICE Diversity Indication IE.
  • the embodiment of the present invention simultaneously generates a CHOICE Diversity Indication first-level field and an E-DCH FDD Information Response first-level field belonging to different first-level fields in one RADIO LINK ADDITION RESPONSE message, and can simultaneously notify the RNC 310 to softer merge. And establishing the information of the E-DCH service, and avoiding that only one secondary field can be selected in the CHOICE Diversity Indication first-level field in the prior art, so that only two options of softer combining and establishing E-DCH service can be selected. One, so that the CHOICE Diversity Indication field will be filled anyway, which will cause communication problems. The communication failure is:
  • step 404 As the UE 340 continues to move in phase 4, since the signals of the UE 340 under CELLO and CELL1 are already weak, the RNC 310 deletes RL0 and RL1, and the UE 340 only has the RL2 wireless link. .
  • CHOICE in Table 1 The Diversity Indication field can only be a one-to-one relationship.
  • the CHOICE Diversity Indication field is Combining
  • the E-DCH FDD Information Response information cannot be notified to the RNC, and the HSUPA service corresponding to the E-DCH is interrupted when the UE 340 is in the Phase 4
  • the CHOICE Diversity Indication field is Non Combining
  • the NODEB 322 cannot fill in the DCH Information Response cell and the NODEB 322 fails to increase the RL2.
  • the UE 340 is in the phase 4
  • the UE 340 does not have a radio link, and the entire UE 340 The business was interrupted.
  • the embodiment of the present invention solves the problem that the prior art fails to notify the RNC 310 of the softer merge and the information of the newly added E-DCH service, and the communication failure occurs, and the difference of the UE 340 between different NODEBs is ensured.
  • CELL keeps communication normal and stable when performing mobile switching.
  • the scenarios in which the embodiments of the present invention are applicable are not limited to the foregoing embodiments, and the embodiments of the present invention are applicable to the case where the above-mentioned technical problems are avoided, in the case where a softer merge is required and the RNC is required to establish/add new related services.
  • the DCH softer merge information and the added E-DCH service information that belong to different first-level fields are not limited to the form of Table 2 above, and may also be: Adding E-DCH service information content to the CHOICE Diversity Indication of Combining
  • the level field indicates that the DCH softer merge information is represented by the E-DCH FDD Information Response first level field.
  • the relative positions of the E-DCH FDD Information Response and the CHOICE Diversity Indication primary field in the table can be arbitrarily set.
  • the embodiment of the invention further provides a mobile communication system, including a UE 340, a NODEB 321, 322 and an RNC 310.
  • the NODEB 322 includes a handover information generating unit 323.
  • the UE 340 performs mobile communication switching between two different NODEBs, NODEB 321, 322, which is controlled by the RNC 310.
  • NODEB 321, 322 There are CELLO under NODEB 321 and CELL1 and CELL2 under NODEB 322. Among them, CELLO and CELL2 support DCH and E-DCH services; CELL1 only supports DCH services.
  • the NODEB 322 has a first link RL1 that only carries the DCH service.
  • the UE 340 establishes RL1 with CELL1 under NODEB 322 when performing DCH and E-DCH services under CELLO of NODEB 321 .
  • the NODEB 322 is requested to add a new DCH and E-DCH service.
  • the NODEB 322 When the two links are RL2, the NODEB 322 performs softer combining on the DC H services of RL1 and RL2. The NODEB 322 notifies the RNC 310 of the information of the softer merge and the addition of the E-DCH service by the handover information generating unit 323.
  • the handover information generating unit 323 is configured to generate, in the RADIO LINK ADDITION RESPONSE message, a CHOICE Diversity Indication field in which the content of the first-level field is Combining (that is, a field indicating DCH softer merge information) and an E-DCH FDD Information Response
  • the field (that is, the field indicating the addition of E-DCH service information) is then sent to the RNC 310 by transmitting a RADIO LINK ADDITION RESPONSE message carrying the DCH softer merge information and the newly added E-DCH service information.
  • NODEB 322 can also be referred to as a first base station
  • NODEB 321 can also be referred to as a second base station.
  • the structure of the RADIO LINK ADDITION RESPONSE message can be referred to Table 2 above.
  • the symbol ">" indicates a first-level field, followed by the symbol ">, the symbol '',, indicating the second-level field of this first-level field, the same reason, the symbol "">> Indicates the three-level field corresponding to the secondary field.
  • Table 2 contains the CHOICE Diversity Indication primary field and the E-DCH FDD Information Response primary field.
  • the CHOICE Diversity Indication primary field there are two secondary fields, Combining and Non Combining, two The secondary field respectively administers the RL ID and DCH Information Response level three fields, where the Combining field is used to tell the RNC 310 a softer merge situation, and the Non Combining is used to tell the RNC 310 DCH to create/add new conditions; because the RNC 310 needs to be told to be softer.
  • the Combining field is selected here.
  • E-DCH FDD Information Response first level field it is used to tell the RNC 310 that the UE 340 wants to add a link and perform E-DCH service on this link.
  • the CHOICE belonging to different first-level fields is simultaneously generated in the RADIO LINK ADDITION RESPONSE message by the switching information generating unit 323.
  • the Diversity Indication first-level field and the E-DCH FDD Information Response first-level field and simultaneously tell the RNC 310 to softer merge and increase the information of the E-DCH service, so that the prior art can only select in the CHOICE Diversity Indication first-level field.
  • a secondary field that causes only Selecting one of the two information of softer combining and adding E-DCH service, regardless of how the CHOICE Diversity Indication field is filled, causes a communication failure.
  • the UE 340 can still ensure the normal communication when the RLO and the RL1 are deleted under the condition that the signals under the CELLO and CELL 1 are already weak, so that the mobile handover is successful. Because the embodiment of the present invention successfully informs the RNC 310 to soften and add information of the E-DCH service at the same time, neither the HSUPA service is interrupted nor the RL2 failure is increased, so the RL2 that can communicate normally is successfully reserved.
  • the embodiment of the invention further discloses a base station, which may include:
  • a link management unit configured to manage a first link that carries only DCH services, and add a second link that carries DCH and E-DCH services,
  • a softer merging unit configured to perform softer combining on the DCH services of the first link and the second link
  • the handover information generating unit is configured to notify the radio network controller of the DCH softer merge information and the added E-DCH service information.
  • the above-mentioned DCH softer merge information and the added E-DCH service information are respectively placed in different first-level fields in the radio link increase response RADIO LINK ADDITION RESPONSE message, and simultaneously transmitted to the radio network controller.

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

Abstract

L'invention concerne un procédé et un système de transfert intercellulaire de communications mobiles. Les étapes de ce procédé consistent à ajouter un second canal prenant en charge les services DCH et E-DCH sur la base de la première liaison prenant en charge uniquement le service DCH, à fusionner le service DCH de la première liaison et de la seconde liaison, à notifier le contrôleur du réseau de radiocommunication par transfert d'une information indiquant la fusion 'souple' des DCH, et d'une information d'addition appartenant à un champ de niveau différent dans une réponse d'addition de liaison radio. La présente invention permet d'augmenter le taux de réussite des transferts de communications mobiles et de maintenir la continuité d'un service de communication. Une station de base est également décrite.
PCT/CN2007/070466 2006-08-17 2007-08-14 Procédé et système et station de base pour transfert intercellulaire de communications mobiles Ceased WO2008019625A1 (fr)

Applications Claiming Priority (2)

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CN200610112188.4 2006-08-17
CN2006101121884A CN101128037B (zh) 2006-08-17 2006-08-17 移动通信切换方法及其设备

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EP2953286A4 (fr) * 2013-02-19 2016-03-23 Huawei Tech Co Ltd Procédé et dispositif de transmission de données

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