WO2009054764A1 - Procédé et dispositif pour une gestion améliorée des ressources radio td-hsdpa - Google Patents

Procédé et dispositif pour une gestion améliorée des ressources radio td-hsdpa Download PDF

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Publication number
WO2009054764A1
WO2009054764A1 PCT/SE2007/050783 SE2007050783W WO2009054764A1 WO 2009054764 A1 WO2009054764 A1 WO 2009054764A1 SE 2007050783 W SE2007050783 W SE 2007050783W WO 2009054764 A1 WO2009054764 A1 WO 2009054764A1
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WO
WIPO (PCT)
Prior art keywords
nodeb
rnc
frequency
rab
channel
Prior art date
Application number
PCT/SE2007/050783
Other languages
English (en)
Inventor
Jie Mao
Jiuhui Du
Bin Xu
Original Assignee
Telefonaktiebolaget Lm Ericsson (Publ)
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 Telefonaktiebolaget Lm Ericsson (Publ) filed Critical Telefonaktiebolaget Lm Ericsson (Publ)
Priority to CN200780101191.9A priority Critical patent/CN101836490B/zh
Priority to PCT/SE2007/050783 priority patent/WO2009054764A1/fr
Priority to TW097125957A priority patent/TWI436611B/zh
Publication of WO2009054764A1 publication Critical patent/WO2009054764A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/16—Central resource management; Negotiation of resources or communication parameters, e.g. negotiating bandwidth or QoS [Quality of Service]
    • H04W28/18—Negotiating wireless communication parameters
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/29—Control channels or signalling for resource management between an access point and the access point controlling device
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W92/00—Interfaces specially adapted for wireless communication networks
    • H04W92/04—Interfaces between hierarchically different network devices
    • H04W92/12—Interfaces between hierarchically different network devices between access points and access point controllers

Definitions

  • a method and a device for improved TD-HSDPA radio resource handling are provided.
  • the present invention discloses a method and a device for improved radio resource handling in a wireless cellular access system of the Time Division High Speed Downlink Packet Access kind, TD-HSDPA.
  • HSDPA High Speed Downlink Packet Access technology
  • TD- HSDPA Time Division Synchronous Code Division Multiple Access
  • Time Division - Synchronous Code Division Multiple Access is one of the standards within 3G 1 the third Generation mobile communication systems.
  • the TD-HSDPA technology uses link adaptation techniques such as AMC, Adaptive Modulation and Coding, and HARQ, Hybrid Automatic Repeat request, in order to enhance the capability of the TD-SCDMA RAN, Radio Access Network, to access packet services.
  • link adaptation techniques such as AMC, Adaptive Modulation and Coding, and HARQ, Hybrid Automatic Repeat request, in order to enhance the capability of the TD-SCDMA RAN, Radio Access Network, to access packet services.
  • TD- HSDPA is standardized within 3GPP, 3G Partnership Project, R5.
  • N-carrier technology Within the TD-SCDMA technology, there is a specific multiple frequency technology known as N-carrier technology which is aimed at improving the system capacity and to optimize the power utilization/coverage balance between common timeslot and traffic timeslots in TD-SCDMA systems.
  • N-carrier TD-HSDPA system the RU assignment for a UE is managed by the Node-B of the cell to which the UE belongs at the moment.
  • the NodeB of the cell will make a recommendation to its RNC regarding the radio resource units, RUs, of the (anticipated) HS-DSCH, i.e. the High Speed Dedicate Shared CHannel, a channel which is used for the HSDPA RAB.
  • the recommendation will be based on, for example, the RU load status or on the RU priority setting, etc.
  • the recommendation will be feedback from the NodeB to the RNC in an information element, IE, of Radio Link Reconfiguration Ready. If the frequency which the NodeB anticipates using for the HS-DSCH RAB coincides with the frequency used for the A-DCH, the HS-DSCH RAB will be setup successfully. However, if the frequency which NodeB wants to use for HS-DSCH RAB does not coincide with the A-DCH frequency, an RU allocation conflict will occur. The NodeB will check the UE capacity to see if the UE in question can work simultaneously in all frequencies, and if this is the case, the HS-DSCH will be setup as recommended by the NodeB.
  • IE information element
  • the frequency of the A-DCH will be used as the bearer of the HS-DSCH, which means that the NodeB has to use the A- DCH frequency instead of its recommendation in the Radio Link Reconfiguration Ready, which will tie the A-DCH and the HS-DSCH to one frequency, which will result in a limitation of the RU assignment flexibility for the NodeB, i.e. for a NodeB in an N-carrier TD-HSDPA system.
  • NodeB in a wireless cellular access system in a better way than previously can establish the Radio Resource Control, the RRC, and the Radio Access Bearer, the RAB, particularly in an N-carrier TD-HSDPA system.
  • the solution should offer the NodeB a greater degree of flexibility than previous solutions, particularly with regard to UEs which can only operate on one frequency simulatenously.
  • Such a solution is offered by the present invention in that it discloses a method for use in a wireless cellular access system of the Time Division High Speed Downlink Packet Access kind, TD-HSDPA, in which system there can be at least a first NodeB which serves to control the traffic to and from user terminals, UEs, within a cell in the system.
  • the system in which the invention can be applied will comprise a Radio Network Controller, an RNC, for the control of at least part of the radio resources of the system, and at least some of the radio Resource Units, the RUs, of cells in the system are assigned by the NodeB of the respective cell.
  • RNC Radio Network Controller
  • a NodeB sets up a connection between a UE and the system by establishing an RRC link, Radio Resource Control, to the RNC, in connection to which a first channel on a first frequency is established between the NodeB and the UE, following which a Radio Access Bearer, RAB, is established between the NodeB and the UE.
  • RRC link Radio Resource Control
  • RAB Radio Access Bearer
  • the NodeB recommends the RNC a second frequency for the RAB, and the NodeB will perform a check of the first frequency used for the first channel and the second frequency recommended for the RAB, and if the two frequencies do not coincide, this information is sent to the RNC.
  • the RNC is notified if the frequency used for the first channel and for the RAB do not coincide, and in a preferred embodiment, the RNC uses the information about the non-coinciding frequencies to take a decision to "migrate" the frequency for the first channel to the recommended frequency for the RAB and also to release RUs which are associated with the first frequency.
  • the first channel is the A-DCH, Assisted Dedicated Cannel, and the RAB is suitably established in the HS- DSCH channel, High Speed Dedicated Shared Channel.
  • the information about the non-coinciding frequencies is sent to the RNC as an added field in an existing information element, IE.
  • the existing IE is an IE in the Radio Link Reconfiguration Ready.
  • Fig 1 shows an overview of a system in which the invention may be applied
  • Fig 2 shows some concepts used in this text
  • Figs 3 and 4 show event diagrams of prior art
  • Figs 5 and 6 show event diagrams of the invention
  • Fig 7 shows a schematic flow chart of a method of the invention
  • Fig 8 shows a block diagram of a transceiver of the invention.
  • Fig 1 shows an overview of a system 100 in which the invention may be applied.
  • the invention is intended mainly for a cellular wireless access system of the TD-HSDPA kind, a system which is the HSDPA (High Speed Downlink Packet Access) version of TD-SCDMA, Time Division Synchronous Code Division Multiple Access.
  • HSDPA High Speed Downlink Packet Access
  • fig 1 in such a system, referred to as 100 in fig 1 , there will be a geographical area, a cell, shown as 130 in fig 1 , within which there can be a number of user terminals, UEs, one of which is shown as 140 in fig 1.
  • the number of UEs in a cell is variable, and the amount shown in fig 1 is merely an example intended to facilitate the reader's understanding of the invention.
  • the system 100 will also comprise at least one so called NodeB, shown as 120 in fig 1 , which serves to control the traffic to and from user terminals, UEs, within a cell such as the cell 130 in the system.
  • the system 100 in which the invention may be utilized will also comprise at least one Radio Network Controller, an RNC 110, which serves to control at least part of the radio resources, the RUs of the system.
  • RNC 110 which serves to control at least part of the radio resources, the RUs of the system. Examples of RUs in a system such as the system 100 of fig 1 are frequencies, time slots, channelization codes etc.
  • Fig 2 is intended to illustrate some concepts which will be used in this text: in fig 2, the "chain" between the units of fig 1 is shown, i.e. UE - Node B - RNC. Shown next to this chain are the so called RRC 190, Radio Resource Control, and the RAB 160, Radio Access Bearer.
  • the RRC is a protocol layer which is present in both the RNC and the UE, while the RAB is a data channel which will extend from the UE via the RNC to the CN, Core Network 117.
  • Fig 3 shows a possible event diagram in a system according to the prior art.
  • NodeB wants to establish HS-DSCH in F1 14: NodeB wants to establish HS-DSCH in F1 and F2 15: NodeB wants to establish HS-DSCH in /F1 , F2, F3) 16: HS-DSCH in F1
  • One of the goals of the present invention is to ensure that the frequencies used for A-DCH and HS-DSCH will coincide.
  • the NodeB makes its recommendation to the RNC regarding the frequency which is to be used for the HS-DSCH, i.e. the channel used for the RAB
  • the NodeB will, prior to making the recommendation to the RNC, check which frequency that is being used for the A-DCH. If the NodeB notices that the two frequencies, i.e. the frequency for the A-DCH and the frequency recommended for the HS-DSCH, do not coincide, the NodeB will inform the RNC of this.
  • the RNC will use the information from the NodeB about the non-coinciding frequencies to take a decision to move or "migrate" the frequency for the first channel, i.e. the RRC, to the recommended frequency for the RAB, and to also release the radio resource Units, the RUs, which are associated with the frequency originally used for the A-DCH.
  • the information about non-coinciding frequencies for A-DCH and HS-DSCH is preferably sent from the NodeB to the RNC as an added element in an existing information element, IE, but the information may naturally also be sent to the RNC as a separate information element, IE. If an existing IE is used, the IE Radio Link Reconfiguration Ready is preferably the IE which is used.
  • Fig 5 shows a possible sequence of events in a system in which the invention is utilized. All messages and events which correspond to those shown in previous figures have retained their reference numerals from those figures.
  • the NodeB recommends the RNC to establish HS- DSCH in frequency F2, which is a recommendation sent in the message Radio Link Reconfiguration ready.
  • the NodeB has, according to the invention, made a comparison between the frequency which it recommends for the HS-DSCH and the frequency which is being utilized for the A-DCH.
  • the comparison shows that the two frequencies are not the same, i.e. they do not coincide.
  • the NodeB informs the RNC of this, and the RNC may use this information in order to see to it that the two channels are established on one and the same frequency.
  • This is shown at "24" in fig 5, where the NodeB prepares to establish the HS-DSCH in F2, and also prepares to shift the A-DCH to F2.
  • the NodeB as the result of an instruction to that effect from the RNC, which may, for example, be received in the message Radio Link Reconfiguration Commit, "18" in figs 3-5.
  • both A-DCH and HS-DSCH are established in F2.
  • the NodeB has released all RUs which were attached to the previous frequency of the A-DCH, i.e. F1.
  • Fig 6 shows a slight variation of the event diagram of fig 6.
  • A-DCH is established in F1
  • the NodeB wishes to establish HS DSCH in F2 and F3, shown as “33” in fig 6.
  • A-DCH is established in F1.
  • the NodeB informs the RNC of this
  • the RNC at "34” recommends the NodeB to shift the A-DCH to frequency F3, which the RNC informs the NodeB of at "34" in the message Radio Link Reconfiguration Commit, "18", and at "35”
  • the A-DCH is established in F3, and HS DSCH in F2 and F3.
  • Fig 7 shows a rough flow chart of a method 700 of the invention. Steps which are options or alternatives have been shown with dashed lines in fig 7.
  • a NodeB sets up, as shown in step 710, a connection between a UE and the system by establishing an RRC link, Radio Resource Control, to the RNC.
  • a first channel on a first frequency is established between the NodeB and the UE, following which, step 720, a Radio Access Bearer, RAB, is established between the NodeB and the UE.
  • RAB Radio Access Bearer
  • the NodeB recommends the RNC a second frequency for the RAB, and as shown in step 730, the NodeB checks the first frequency used for the first channel and the second frequency recommended for the RAB, and if these two frequencies do not coincide, this information is sent, step 735, to the RNC. As shown in step 740. in one embodiment of the invention, the RNC uses the information from the NodeB about the non-coinciding frequencies to take a decision to migrate the frequency for the first channel to the recommended frequency for the RAB, and to release RUs which are associated with the first frequency.
  • Step 745 shows that the first channel is preferably the A-DCH, the Assisted Dedicated Cannel.
  • the RAB may in one embodiment of the invention be established in the HS-DSCH channel, the High Speed Dedicated Shared Channel.
  • Step 755 shows that the information about the non-coinciding frequencies is sent to the RNC as an added element in an existing information element, an IE, which may be the IE Radio Link Reconfiguration Ready. However, in another embodiment, this information may be sent as a separate information element, a separate IE.
  • an IE which may be the IE Radio Link Reconfiguration Ready.
  • this information may be sent as a separate information element, a separate IE.
  • Fig 8 shows a rough block diagram of a "base station” or a transceiver 800 of the invention, for use as a eNodeB as described above. As can be seen in fig
  • the eNodeB 800 of the invention comprises an antenna 810 for communicating with the UEs in one or more cell, and also comprises a transmitter 830 and a receiver 820 for said communication.
  • the eNodeB 800 also comprises control means such as for example a microprocessor 840, as well as comprising a memory 850.
  • the transceiver 800 may comprise an interface, "Int", 860, towards another node, such as the RNC.
  • the transceiver 800 basically comprises means for functioning according to the method described above, and is thus intended for use as a NodeB in a wireless cellular access system of the Time Division High Speed Downlink Packet Access kind, TD-HSDPA, and has means for: • controlling the traffic to and from user terminals, UEs, within a cell (130) in the system.
  • These means may comprise the controller 840, the memory 850, the transmitter 830 and the antenna 810.
  • RNC Radio Network Controller
  • the interface 860 which may be assisted by, for example, the controller 840.
  • These means may comprise the controller 840, the memory 850, the transmitter 830 and the antenna 810.
  • RAB Radio Access Bearer
  • the inventive NodeB comprises means such as the controller 840, and the memory 850 for performing a check of the first frequency used for the first channel and the second frequency recommended for the RAB, and if the two frequencies do not coincide, means such as the interface 860 and the controller 840 for sending this information to the RNC.
  • all or parts of the invention can be realized as computer executable software, SW, which may be stored on or in a storage media such as an optical or magnetic disc, magnetic tape, E-PROM or E 2 - PROM memories etc. If the invention, or parts of it, is/are realized as SW, the SW may also be stored on or in one or more node(s) in a system in which the invention is applied. For example, it would be possible to let nodes such as the RNC and the NodeB have the appropriate parts of the SW stored, and to let those nodes execute the SW during the operation of the system.

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

Abstract

L'invention porte sur un procédé pour un système d'accès par paquets en liaison descendante haut débit à répartition temporelle (TD-HSDPA) (100) ayant un nœud B (120) qui commande un trafic vers et depuis des terminaux d'utilisateur (UE) (140), et ayant un contrôleur de réseau radio (RNC) (110), pour commander des ressources radio dans le système. Certaines unités de ressources radio d'une cellule (130) sont attribuées par un nœud B (120), et le nœud B établit (710) une connexion entre un équipement utilisateur et le système par établissement d'une gestion des ressources radio (RRC) vers le RNC. Un premier canal sur une première fréquence est établi entre le nœud B et l'équipement utilisateur. Un support d'accès radio (RAB) est établi entre le nœud B et l'équipement utilisateur, et le nœud B recommande (725) au RNC une seconde fréquence pour le RAB. Le nœud B effectue une vérification (730) de la première fréquence du premier canal et de la seconde fréquence recommandée pour le RAB, et si les deux fréquences ne coïncident pas, les informations correspondantes sont envoyées (735) au RNC.
PCT/SE2007/050783 2007-10-26 2007-10-26 Procédé et dispositif pour une gestion améliorée des ressources radio td-hsdpa WO2009054764A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
CN200780101191.9A CN101836490B (zh) 2007-10-26 2007-10-26 用于改进的td-hsdpa无线资源处理的方法和设备
PCT/SE2007/050783 WO2009054764A1 (fr) 2007-10-26 2007-10-26 Procédé et dispositif pour une gestion améliorée des ressources radio td-hsdpa
TW097125957A TWI436611B (zh) 2007-10-26 2008-07-09 改善分時高速下行鏈路封包存取無線電資源處置之裝置及方法

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/SE2007/050783 WO2009054764A1 (fr) 2007-10-26 2007-10-26 Procédé et dispositif pour une gestion améliorée des ressources radio td-hsdpa

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WO2009054764A1 true WO2009054764A1 (fr) 2009-04-30

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CN (1) CN101836490B (fr)
TW (1) TWI436611B (fr)
WO (1) WO2009054764A1 (fr)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060274712A1 (en) * 2005-04-28 2006-12-07 Qualcomm Incorporated Multi-carrier operation in data transmission systems
US20060291403A1 (en) * 2005-05-27 2006-12-28 Jussi Kahtava Expanded signalling capability for network element, user equipment and system

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1361770A1 (fr) * 2002-05-06 2003-11-12 Siemens Aktiengesellschaft Procédé et système de radiocommunication pour la transmission d'informations utiles comme service à plusieurs stations d'abonnées

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060274712A1 (en) * 2005-04-28 2006-12-07 Qualcomm Incorporated Multi-carrier operation in data transmission systems
US20060291403A1 (en) * 2005-05-27 2006-12-28 Jussi Kahtava Expanded signalling capability for network element, user equipment and system

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
LIN HUIBIN, CHEN SHUPING, ASIMAKIS K.: "Scheduling and Performance of Multicarrier TD-SCDMA HSDPA", CHINACOM'07, SECOND INTERNATIONAL CONFERENCE ON COMMUNICATIONS AND NETWORKING IN CHINA, 2007, 22 August 2007 (2007-08-22) - 24 August 2007 (2007-08-24), pages 1042 - 1046, XP031238028, Retrieved from the Internet <URL:http://ieeexplore.ieee.org/ie15/4469305/4469306/4469564.pdf> *

Also Published As

Publication number Publication date
TWI436611B (zh) 2014-05-01
CN101836490B (zh) 2013-01-30
TW200922345A (en) 2009-05-16
CN101836490A (zh) 2010-09-15

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