WO2011119996A1 - Gestion de supports radio au niveau d'une station de base donneuse dans un réseau sans fil ayant des relais - Google Patents

Gestion de supports radio au niveau d'une station de base donneuse dans un réseau sans fil ayant des relais Download PDF

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Publication number
WO2011119996A1
WO2011119996A1 PCT/US2011/030054 US2011030054W WO2011119996A1 WO 2011119996 A1 WO2011119996 A1 WO 2011119996A1 US 2011030054 W US2011030054 W US 2011030054W WO 2011119996 A1 WO2011119996 A1 WO 2011119996A1
Authority
WO
WIPO (PCT)
Prior art keywords
rbs
base station
indication
relay node
donor base
Prior art date
Application number
PCT/US2011/030054
Other languages
English (en)
Inventor
Xiaolong Huang
Fatih Ulupinar
Original Assignee
Qualcomm Incorporated
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
Priority claimed from US13/071,250 external-priority patent/US20110235569A1/en
Application filed by Qualcomm Incorporated filed Critical Qualcomm Incorporated
Priority to CN201180015819.XA priority Critical patent/CN102823312B/zh
Priority to KR1020127027656A priority patent/KR101518373B1/ko
Priority to JP2013501525A priority patent/JP5507753B2/ja
Priority to EP11713565A priority patent/EP2550834A1/fr
Publication of WO2011119996A1 publication Critical patent/WO2011119996A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/08—Load balancing or load distribution
    • H04W28/0827—Triggering entity
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/0289—Congestion control
    • 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]
    • H04W28/24—Negotiating SLA [Service Level Agreement]; Negotiating QoS [Quality of Service]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/52—Allocation or scheduling criteria for wireless resources based on load
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/08—Access point devices
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/24—Radio transmission systems, i.e. using radiation field for communication between two or more posts
    • H04B7/26—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile
    • H04B7/2603—Arrangements for wireless physical layer control
    • H04B7/2606—Arrangements for base station coverage control, e.g. by using relays in tunnels
    • 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
    • H04W76/00—Connection management
    • H04W76/30—Connection release
    • H04W76/34—Selective release of ongoing connections
    • 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

  • a bearer is defined as a packet flow with a defined Quality of Service (QoS) between a gateway and a user equipment (UE).
  • QoS Quality of Service
  • UE user equipment
  • DRBs data radio bearers
  • DeNB donor base station
  • Un data radio bearers data radio bearers
  • the DeNB may experience congestion on its Un interface that serves the backhaul.
  • the Uu interface between the relay node and the relay's served UEs observes no capacity problem.
  • Certain aspects of the present disclosure provide a method for operating a donor base station having a first plurality of radio bearers (RBs) that interface with a relay node.
  • the method generally includes determining traffic congestion on the first plurality of RBs, and taking one or more actions to trigger removal of at least one of a second plurality of RBs that interface between the relay node and at least one user equipment (UE).
  • RBs radio bearers
  • Certain aspects of the disclosure also provide a donor base station having a first plurality of radio bearers (RBs) that interface with a relay node.
  • the donor base station generally includes a traffic monitor component configured to determine traffic congestion on the first plurality of RBs.
  • the donor base station further includes a radio bearer manager component configured to take one or more actions to trigger removal of at least one of a second plurality of RBs that interface between the relay node and at least one user equipment (UE).
  • UE user equipment
  • Certain aspects of the present disclosure provide an apparatus for wireless communications having a first plurality of radio bearers (RBs) that interface with a relay node.
  • the apparatus generally includes means for determining traffic congestion on the first plurality of RBs, and means for taking one or more actions to trigger removal of at least one of a second plurality of RBs that interface between the relay node and at least one user equipment (UE).
  • RBs radio bearers
  • UE user equipment
  • Certain aspects of the present disclosure provide a computer program product comprising a computer readable medium having instructions for operating a donor base station having a first plurality of radio bearers (RBs) that interface with a relay node stored thereon.
  • the instructions are generally executable by one or more processors for determining traffic congestion on the first plurality of RBs, and taking one or more actions to trigger removal of at least one of a second plurality of RBs that interface between the relay node and at least one user equipment (UE).
  • UE user equipment
  • FIG. 1 illustrates a multiple access wireless communication system.
  • FIG. 2 is a block diagram of a communication system.
  • FIG. 3 illustrates an exemplary wireless communication system with a relay base station according to certain aspects of the present disclosure.
  • FIG. 4 is a block diagram of a wireless communication system with a relay node according to certain aspects of the disclosure.
  • FIG. 5 illustrates exemplary communication apparatuses that manage radio bearers according to certain aspects of the subject disclosure.
  • FIG. 6 illustrates an example of mapping between radio bearers in a wireless communication system according to certain aspects of the disclosure.
  • FIG. 8 is a sequence diagram illustrating example operations for indirect Uu bearer deactivation mechanism according to certain aspects of the disclosure.
  • FIG. 9 is a sequence diagram illustrating example operations for direct Uu bearer deactivation mechanism according to certain aspects of the disclosure.
  • FIG. 10 is a sequence diagram illustrating example operations for user equipment context release mechanism according to certain aspects of the disclosure.
  • Certain aspects of the present disclosure provide apparatuses and techniques for managing radio bearers in a wireless communications network having a relay node and donor base station.
  • a relay node may serve multiple UE packet flows.
  • the Uu radio bearers used for UE packet flows between the relay node and its served UEs are carried by the Un data radio bearers used for relay packet flows between the relay and its donor base station.
  • the donor base station may experience congestion on its Un interface. When this occurs, it is desirable for the donor base station to release some Uu bearers or UE contexts for UEs that are served under the relay node.
  • the donor base station has visibility of Uu bearers under an LTE relay architecture, the donor base station does not directly administer control plane transactions of the Uu interface. Accordingly, this presents a challenge for relay nodes and donor base stations to efficiently manage wireless resources to provide UE flows over Un radio bearers while maintaining a certain quality of service throughout the communication network.
  • a donor base station to remove Uu bearers carried by the donor base station's Un bearers when Un bearers are congested.
  • Certain aspects of the present disclosure generally provide mechanisms to invoke an indirect release of Uu bearers, a direct release of Uu bearers, or a UE context release for a given UE.
  • a Uu bearer refers to a radio bearer of an interface between a relay node and user equipment (UE), and may be also be referred to as a Uu radio bearer, or Uu data radio bearer.
  • UE user equipment
  • Uu data radio bearer generally refers to a bearer of an interface between a relay node and an associated donor base station, and may also be referred to as a Un radio bearer, or a Un data radio bearer.
  • CDMA Code Division Multiple Access
  • TDMA Time Division Multiple Access
  • FDMA Frequency Division Multiple Access
  • OFDMA Orthogonal FDMA
  • SC-FDMA Single-Carrier FDMA
  • a CDMA network may implement a radio technology such as Universal Terrestrial Radio Access (UTRA), cdma2000, etc.
  • UTRA includes Wideband-CDMA (W-CDMA) and Low Chip Rate (LCR).
  • cdma2000 covers IS-2000, IS-95 and IS-856 standards.
  • a TDMA network may implement a radio technology such as Global System for Mobile Communications (GSM).
  • GSM Global System for Mobile Communications
  • An OFDM A network may implement a radio technology such as Evolved UTRA (E-UTRA), IEEE 802.11, IEEE 802.16, IEEE 802.20, Flash-OFDM®, etc.
  • E-UTRA, E-UTRA, and GSM are part of Universal Mobile Telecommunication System (UMTS).
  • UMTS Universal Mobile Telecommunication System
  • LTE Long Term Evolution
  • UTRA, E-UTRA, GSM, UMTS and LTE are described in documents from an organization named "3rd Generation Partnership Project" (3GPP).
  • cdma2000 is described in documents from an organization named "3rd Generation Partnership Project 2" (3GPP2).
  • SC-FDMA Single carrier frequency division multiple access
  • SC-FDMA has similar performance and essentially the same overall complexity as those of OFDMA system.
  • SC-FDMA signal has lower peak-to-average power ratio (PAPR) because of its inherent single carrier structure.
  • PAPR peak-to-average power ratio
  • SC-FDMA has drawn great attention, especially in the uplink communications where lower PAPR greatly benefits the mobile terminal in terms of transmit power efficiency. It is currently a working assumption for uplink multiple access scheme in 3 GPP Long Term Evolution (LTE), or Evolved UTRA.
  • LTE Long Term Evolution
  • Access terminal 122 is in communication with antennas 106 and 108, where antennas 106 and 108 transmit information to access terminal 122 over forward link 126 and receive information from access terminal 122 over reverse link 124.
  • communication links 1 18, 120, 124 and 126 may use different frequency for communication.
  • forward link 120 may use a different frequency then that used by reverse link 1 18.
  • Each group of antennas and/or the area in which they are designed to communicate is often referred to as a sector of the access point.
  • antenna groups each are designed to communicate to access terminals in a sector, of the areas covered by access point 100.
  • an AT 1 16 may be in communication with an AP 100 by means of a radio interface having a Uu radio bearer. Further, additional APs 100 may be inter-connected with each other by means of an interface known as X2, and to a network node, such as an Enhanced Packet Core (EPC) node, by means of an S I interface.
  • EPC Enhanced Packet Core
  • the coded data for each data stream may be multiplexed with pilot data using OFDM techniques.
  • the pilot data is typically a known data pattern that is processed in a known manner and may be used at the receiver system to estimate the channel response.
  • the multiplexed pilot and coded data for each data stream is then modulated (i.e., symbol mapped) based on a particular modulation scheme (e.g., BPSK, QSPK, M-PSK, or M-QAM) selected for that data stream to provide modulation symbols.
  • the data rate, coding, and modulation for each data stream may be determined by instructions performed by processor 230.
  • Each transmitter 222 receives and processes a respective symbol stream to provide one or more analog signals, and further conditions (e.g., amplifies, filters, and upconverts) the analog signals to provide a modulated signal suitable for transmission over the MIMO channel.
  • NT modulated signals from transmitters 222a through 222t are then transmitted from NT antennas 224a through 224t, respectively.
  • the transmitted modulated signals are received by NR antennas 252a through 252r and the received signal from each antenna 252 is provided to a respective receiver (RCVR) 254a through 254r.
  • Each receiver 254 conditions (e.g., filters, amplifies, and downconverts) a respective received signal, digitizes the conditioned signal to provide samples, and further processes the samples to provide a corresponding "received" symbol stream.
  • the reverse link message may comprise various types of information regarding the communication link and/or the received data stream.
  • the reverse link message is then processed by a TX data processor 238, which also receives traffic data for a number of data streams from a data source 236, modulated by a modulator 280, conditioned by transmitters 254a through 254r, and transmitted back to transmitter system 210.
  • the modulated signals from receiver system 250 are received by antennas 224, conditioned by receivers 222, demodulated by a demodulator 240, and processed by a RX data processor 242 to extract the reserve link message transmitted by the receiver system 250.
  • Processor 230 determines which pre-coding matrix to use for determining the beamforming weights then processes the extracted message.
  • Transport Channels are classified into DL and UL.
  • DL Transport Channels comprises a Broadcast Channel (BCH), Downlink Shared Data Channel (DL-SDCH) and a Paging Channel (PCH), the PCH for support of UE power saving (DRX cycle is indicated by the network to the UE), broadcasted over entire cell and mapped to PHY resources which can be used for other control/traffic channels.
  • the UL Transport Channels comprises a Random Access Channel (RACH), a Request Channel (REQCH), an Uplink Shared Data Channel (UL-SDCH) and plurality of PHY channels.
  • the PHY channels comprise a set of DL channels and UL channels.
  • CPICH Common Pilot Channel
  • CCCH Common Control Channel
  • SDCCH Shared DL Control Channel
  • MCCH Multicast Control Channel
  • DL-PSDCH DL Physical Shared Data Channel
  • the UL PHY Channels comprises :
  • CQICH Channel Quality Indicator Channel
  • FIG. 3 illustrates an example wireless system 300 in which certain aspects of the present disclosure may be practiced.
  • the system 300 includes a donor base station (also known as a donor access point, a donor base station, a donor eNodeB, or DeNB) 302 that communicates with a user equipment (UE) 304 via a relay BS (also known as relay access point or relay node) 306.
  • the relay BS 306 may communicate with the donor BS 302 via a backhaul link 308 and with the UE 304 via an access link 310.
  • the relay node gateway component of the donor base station generates an indication to the UE's MME associated with the UE corresponding to the selected Uu bearer of bearer release of the selected Uu bearer.
  • relay node S/P gateway transmits an Indication of Bearer Release to the UE's MME (illustrated as 440B) so that the UE's MME can initiate a Uu bearer deactivation procedure.

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

Abstract

L'invention concerne des techniques et des appareils pour gérer des supports radio pendant un encombrement de trafic dans un réseau de communication sans fil ayant des relais. Selon certains aspects, une station de base donneuse peut détecter un encombrement de trafic sur un support radio Un configuré pour s'interfacer entre le nœud de relais et la station de base donneuse, le support radio Un portant une pluralité de supports Uu configurée pour s'interfacer entre le nœud de relais et au moins un équipement d'utilisateur (UE). Selon certains aspects, la station de base donneuse peut effectuer une ou plusieurs actions pour déclencher la suppression d'au moins un des supports Uu portés sur le support Un.
PCT/US2011/030054 2010-03-25 2011-03-25 Gestion de supports radio au niveau d'une station de base donneuse dans un réseau sans fil ayant des relais WO2011119996A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
CN201180015819.XA CN102823312B (zh) 2010-03-25 2011-03-25 具有中继的无线网络中的供给方基站处的无线承载管理
KR1020127027656A KR101518373B1 (ko) 2010-03-25 2011-03-25 중계기들을 갖는 무선 네트워크에서 도우너 기지국에서의 라디오 베어러 관리
JP2013501525A JP5507753B2 (ja) 2010-03-25 2011-03-25 リレーを備えた無線ネットワークにおけるドナー基地局におけるラジオ・ベアラ管理
EP11713565A EP2550834A1 (fr) 2010-03-25 2011-03-25 Gestion de supports radio au niveau d'une station de base donneuse dans un réseau sans fil ayant des relais

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US31763210P 2010-03-25 2010-03-25
US61/317,632 2010-03-25
US13/071,250 US20110235569A1 (en) 2010-03-26 2011-03-24 Radio bearer management at a donor base station in a wireless network with relays
US13/071,250 2011-03-24

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Publication Number Publication Date
WO2011119996A1 true WO2011119996A1 (fr) 2011-09-29

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PCT/US2011/030054 WO2011119996A1 (fr) 2010-03-25 2011-03-25 Gestion de supports radio au niveau d'une station de base donneuse dans un réseau sans fil ayant des relais

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EP (1) EP2550834A1 (fr)
JP (1) JP5507753B2 (fr)
KR (1) KR101518373B1 (fr)
CN (1) CN102823312B (fr)
WO (1) WO2011119996A1 (fr)

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Also Published As

Publication number Publication date
CN102823312A (zh) 2012-12-12
CN102823312B (zh) 2015-06-03
KR20120132687A (ko) 2012-12-07
JP5507753B2 (ja) 2014-05-28
JP2013524573A (ja) 2013-06-17
EP2550834A1 (fr) 2013-01-30
KR101518373B1 (ko) 2015-05-08

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