WO2012046970A2 - Dispositif et procédé permettant d'attribuer des ressources radio dans un réseau de communication sans fil - Google Patents

Dispositif et procédé permettant d'attribuer des ressources radio dans un réseau de communication sans fil Download PDF

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Publication number
WO2012046970A2
WO2012046970A2 PCT/KR2011/007071 KR2011007071W WO2012046970A2 WO 2012046970 A2 WO2012046970 A2 WO 2012046970A2 KR 2011007071 W KR2011007071 W KR 2011007071W WO 2012046970 A2 WO2012046970 A2 WO 2012046970A2
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Prior art keywords
subframe
terminal
frame
allocation information
configuration
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PCT/KR2011/007071
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English (en)
Korean (ko)
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WO2012046970A3 (fr
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노태균
안재영
김재흥
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한국전자통신연구원
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Priority claimed from KR1020110096821A external-priority patent/KR20120035106A/ko
Application filed by 한국전자통신연구원 filed Critical 한국전자통신연구원
Priority to US13/877,379 priority Critical patent/US20130188550A1/en
Publication of WO2012046970A2 publication Critical patent/WO2012046970A2/fr
Publication of WO2012046970A3 publication Critical patent/WO2012046970A3/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation

Definitions

  • the present invention relates to an apparatus and method for allocating a radio resource in a wireless communication network. More particularly, the present invention relates to allocating radio resources to at least one terminal in a wireless communication network using a frame structure in which radio resources are distinguishable in time and having a predetermined period.
  • An apparatus and method are provided.
  • 3GPP Third Generation Partnership Project
  • LTE Long Term Evolution
  • System Architecture Evolution System Architecture Evolution
  • the LTE downlink transmission scheme is based on orthogonal frequency division multiplexing (OFDM), and a single carrier transmission scheme based on Discrete Fourier Transform Spread (DFTS) -OFDM is used for uplink.
  • OFDM orthogonal frequency division multiplexing
  • DFTS Discrete Fourier Transform Spread
  • Processing for LTE also consists of different protocol hierarchies.
  • the LTE protocol structure for example, in case of downlink, data to be transmitted enters a processing process in the form of an IP packet on the SAE bearer. IP packets entering the processing process are packet data convergence protocol (PDCP) layers, segmentation / concatenation (IPCP), which perform IP header compression to reduce the number of bits transmitted over the air interface, before they are sent over the air interface.
  • PDCP packet data convergence protocol
  • IPCP segmentation / concatenation
  • RLC Radio Link Control
  • MAC Medium Access Control
  • the LTE physical layer is transmitted through a time domain structure of LTE transmission based on a frame having a predetermined length of time.
  • Each frame is identified by a system frame number (SFN).
  • SFN is used to control various transmission periods that may have a period longer than one frame, such as a paging and sleep-mode period or a channel state reporting period.
  • one frame consists of a time length of 10 ms each consisting of 10 subframes each having a length of 1 ms.
  • LTE can operate in both modes of Frequency Division Duplex (FDD) and Time Division Duplex (TDD), and the frame structure is generally similar to the FDD mode and the TDD mode, but has a structure having several different differences.
  • FDD Frequency Division Duplex
  • TDD Time Division Duplex
  • radio resource allocation In order to transmit and receive data between the base station and the terminal, it is required to allocate radio resources classified based on these frames according to a predetermined criterion. However, since one or a plurality of subframes included in one frame may be used only for a specific terminal or a specific terminal group related to a specific service, radio resource allocation is not easy.
  • An object of the present invention is to provide an apparatus for allocating radio resources to at least one terminal in a wireless communication network using a frame structure in which radio resources are distinguishable in time and having a predetermined period.
  • Another object of the present invention is to provide a method for allocating radio resources to at least one terminal in a wireless communication network using a frame structure in which radio resources are distinguishable in time and having a predetermined period.
  • an apparatus for allocating a radio resource allocates radio resources to at least one terminal in a wireless communication network using a frame structure in which radio resources are separated in time and have a predetermined period.
  • An apparatus comprising: identifying information about a period, an offset, and a subframe to be used of a radio resource allocated to a terminal group consisting of at least one terminal sharing characteristics, and using the same, subframe allocation information for each terminal group And a wireless transmitter for transmitting the configured subframe allocation information to at least one terminal.
  • the information on the subframe to be used may include the first subframe indicated by each component and the number of subframes continuously used.
  • the first subframe indicated by each component may be calculated using at least one of the number of subframes constituting one frame, a frame index, a subframe index, and a period of the configuration.
  • the subframe indicated by the configuration i as allocation information for each terminal group may be defined according to the following equation,
  • N sf Represents the number of subframes constituting one frame, n f Is the frame index, n sf Is the subframe index, T sf, i Is the cycle of configuration i, D sf, i Denotes the offset of configuration i, N consc, i Denotes the number of consecutively used subframes of configuration i, and "mod" is a modulo operator.
  • the information about the subframe to be used may be bitmap information on a subframe available in at least one frame of one period.
  • the number of bits constituting the bitmap may be calculated by multiplying the number of frames indicated by the bitmap with the number of subframes available in one frame.
  • the bitmap When the bitmap indicates allocation information for a plurality of frames, the bitmap may be configured individually and sequentially for each frame.
  • Offset D f, i of configuration i as allocation information for each terminal group may be defined according to the following equation,
  • n f represents a frame index
  • T f, i represents a period of configuration i
  • D f, i represents an offset of configuration i
  • “mod” is a modulo operator
  • the subframe allocation information may be transmitted in a broadcast form to all terminals in the cell using broadcast information in a radio resource control (RRC) message.
  • RRC radio resource control
  • the subframe allocation information may be individually transmitted to at least one terminal associated with the subframe allocation information through a signaling radio bearer in a radio resource control (RRC) message.
  • RRC radio resource control
  • a method for allocating a radio resource to at least one terminal in a wireless communication network using a frame structure in which radio resources are separated in time and have a predetermined period relates to a method of allocating a mobile station comprising: information on a period, an offset, and a subframe to be used of a radio resource allocated to a terminal group consisting of at least one terminal sharing characteristics, and using the same, assigns a subframe to each terminal group Comprising information and transmitting the configured subframe allocation information to at least one terminal.
  • the terminal group composed of at least one terminal sharing the characteristics may be a terminal group that receives a nominal MBMS subframe, an LTE-Advanced terminal group, and a terminal group that substantially receives MBMS data. It may include.
  • a subframe using only a specific terminal or a specific group of terminals is allocated through a period and an offset and a number of subframes continuously used, or a period and an offset and Radio resources can be effectively allocated by allocating through bitmaps for subframes available within one or a plurality of frames.
  • FIG. 1 is a block diagram of a wireless communication system to which various embodiments of the present invention are applied.
  • FIG. 2 is a conceptual diagram illustrating a radio resource allocation method according to an embodiment of the present invention.
  • FIG. 3 is a conceptual diagram illustrating a radio resource allocation method according to another embodiment of the present invention.
  • FIG. 4 is a conceptual diagram illustrating a radio resource allocation method according to another embodiment of the present invention.
  • FIG. 5 is a flowchart of a radio resource allocation method according to an embodiment of the present invention.
  • the base station is used to mean a control device that controls one cell.
  • a 'physical base station' may control a plurality of cells.
  • the 'physical base station' includes several 'base stations' in the present invention. That is, a parameter allocated differently for each cell may be considered that each 'base station' allocates a different value.
  • the terminal may be a user equipment (UE), a mobile station (MS), a relay node (RN), or a machine type communication (MTC) device.
  • UE user equipment
  • MS mobile station
  • RN relay node
  • MTC machine type communication
  • FIG. 1 illustrates a configuration of a wireless communication system to which various embodiments of the present invention are applied.
  • the wireless communication system to which the present invention can be applied includes at least one base station 100 and at least one user terminal 200 connected to a network including a wired network and the like, and additionally includes a relay 110 and the like according to cell characteristics. can do.
  • Base station 100 is a wireless end node for transmitting data to the user terminal, the wireless end node may appear in the form of a small or home base station in addition to the general base station to cover a certain service area.
  • the wireless end node may be a relay 110 as shown in FIG. 1.
  • the base station or the relay may be a preferred embodiment of the radio resource allocation apparatus according to the present invention.
  • the base station 100 or the relay 110 distributes, or allocates, radio resources to the terminals according to a predetermined rule.
  • Radio resources transmitted and received between the base station (or relay) and the terminal may be configured in subframe units.
  • One frame may include a plurality of subframes.
  • One or a plurality of subframes of one frame may use only a specific terminal or a specific terminal group.
  • the specific terminal group may be a terminal group using a multimedia broadcast multicast service (MBMS) or an LTE-Advanced terminal group.
  • MBMS multimedia broadcast multicast service
  • LTE-Advanced terminal group an LTE-Advanced terminal group
  • the subframe may be a downlink subframe or an uplink subframe.
  • An apparatus for allocating a radio resource includes at least one of allocating radio resources to at least one terminal in a wireless communication network using a frame structure in which radio resources are separated in time and having a predetermined period, and sharing characteristics. It may be configured to include a control unit for identifying the information about the period, the offset, and the sub-frame to be used, the radio resources allocated to the terminal group consisting of one terminal, and configures the sub-frame allocation information for each terminal group using this information. have.
  • the radio resource allocation information thus configured is notified to all terminals or related specific terminals in the service area through the radio transmitter of each radio end node 100 or 110.
  • An apparatus for allocating a radio resource according to an embodiment of the present invention may be a base station 100 or a relay 110.
  • a first method of allocating a radio resource is to allocate the number of subframes used consecutively with a period and an offset.
  • the period and offset are each in subframe units, and the offset is smaller than the period.
  • the subframe indicated by each component of the first method may be represented by Equation 1 below.
  • N sf Represents the number of subframes constituting one frame, n f Is the frame index, n sf Is the subframe index, T sf, i Is the cycle of configuration i, D sf, i Denotes the offset of configuration i, N consc, i Denotes the number of consecutively used subframes of configuration i.
  • mod is a modulo operator.
  • offset of configuration i D sf, i Is set based on the first subframe of the first frame.
  • the system frame number (SFN) represents a frame index used by the base station and the terminal.
  • FIG. 2 is a conceptual diagram illustrating a radio resource allocation method according to an embodiment of the present invention.
  • N sf is assumed to be 10.
  • 2 shows a state in which radio resources are allocated to two configurations, that is, two terminal groups. It can be seen that the first configuration "Configuration 0" has a period of 10, an offset of 3, and the number of subframes used continuously is one. The second configuration, “Configuration 1" has a period of 20, an offset of 17, and the number of subframes used in succession is two.
  • a second method of allocating a radio resource is to allocate a period and an offset and a bitmap for subframes usable within one or a plurality of frames.
  • the period and the offset are each in units of frames, and the offset is smaller than the period.
  • the second method of allocating radio resources according to the present invention is different from the first method in that the period and offset are in units of frames.
  • the period is greater than or equal to the number of frames indicated by the bitmap.
  • the number of bits in a bitmap is equal to the product of the number of frames represented by the bitmap by the number of subframes available in one frame.
  • the bitmap may be separately configured in a sequence of bitmaps for the first frame, bitmaps for the second frame, and the like.
  • the bitmap for one frame is sequentially composed of subframes usable in one frame.
  • a method of allocating a subframe using only a specific UE or a specific UE group is one. Or a combination of a plurality of configurations.
  • the frame indicated by each component of the second method may also be represented by Equation 2.
  • n f represents a frame index
  • T f, i represents a period of component i
  • D f, i represents an offset of component i.
  • the offset D f, i of the configuration i is set based on the first subframe of the first frame.
  • the system frame number (SFN) represents a frame index used by the base station and the terminal.
  • FIG. 3 is a conceptual diagram illustrating a radio resource allocation method according to another embodiment of the present invention.
  • the number of subframes constituting one frame is 10.
  • a total of four subframes can be used in one frame, assuming that the second subframe, the fourth subframe, the seventh subframe, and the ninth subframe are used.
  • the third consists of two configurations.
  • the first configuration, "Configuration 0" has a period of two and an offset of one.
  • the range of the bitmap for the subframes is one frame, in which case the bitmap may consist of a total of four bits, and the bitmap of "configuration 0" may be represented by 0011.
  • 1 means a subframe used
  • 0 means a subframe not used.
  • the second configuration, "Configuration 1" has a period of four and an offset of zero.
  • the range of the bitmap for the subframes may be two frames, in which case the bitmap may consist of a total of eight bits, and the bitmap of "Configuration 1" may be represented as 11001000.
  • 1 means a subframe used
  • 0 means a subframe not used.
  • a method of allocating a subframe using only a specific terminal or a specific terminal group is called subframe allocation information.
  • the base station transmits the subframe allocation information to the terminal, there is a method for broadcasting to all the terminals in the cell, there is a method for transmitting to the associated terminal individually.
  • the terminal may identify the downlink subframe transmitted from the base station by receiving the subframe allocation information, or may identify the uplink subframe to be transmitted to the base station.
  • a first embodiment of a method of transmitting subframe allocation information includes a method of broadcasting to all terminals in a cell, and this method is a method of transmitting through RRC broadcasting information (System information) in 3GPP.
  • a second embodiment of a method of transmitting subframe allocation information may be a method of individually transmitting to a related terminal, and this method is a method of transmitting through SRB (Signalling Radio Bearer) of RRC in 3GPP.
  • the RRC layer above the MAC layer performs various control functions related to setting, changing, and releasing the lower layer in the terminal or the network.
  • Related RRC messages are exchanged between the UE and the network to support various RRC procedures.
  • system information is configured in the form of a system information block (SIB), and each system information block includes a series of functionally related parameters.
  • SIB system information block
  • the base station may transmit one or a plurality of subframe allocation information to the terminal.
  • each subframe allocation information indicates a subframe using only a specific terminal or a specific terminal group.
  • there may be a terminal that can receive the subframe allocation information there may be a terminal that cannot receive the subframe allocation information.
  • the terminal capable of receiving the subframe allocation information may use the subframe indicated by the subframe allocation information.
  • the terminal capable of receiving the subframe allocation information receives the subframe allocation information and the subframe allocation information is not related to itself, the terminal does not use the subframe indicated by the subframe allocation information.
  • FIG. 4 is a conceptual diagram of a radio resource allocation method according to another embodiment of the present invention.
  • Terminal 0 is an LTE terminal
  • terminal 1 is an LTE-Advanced terminal
  • terminal 2 is an LTE terminal
  • terminal 3 is an LTE Assume that the terminal is an Advanced terminal and receives the MBMS.
  • the terminal group 1 is a terminal group that nominally receives a subframe for MBMS, and resource allocation information for these terminals is called allocation information A
  • terminal group 2 is an LTE-Advanced terminal group
  • resource allocation information for these terminals is Assume that the allocation information B, the terminal group 3 is actually a terminal group receiving the MBMS data, and assume that the resource allocation information for these terminals is the allocation information C.
  • the nominal MBMS subframe means a MBSFN (Multimedia Broadcast Single Frequency Network) subframe used for relaying, positioning, and the like.
  • the MBSFN subframe was originally proposed for the MBMS, but may be used for other purposes except for the MBMS, such as relay and positioning.
  • the MBSFN subframe can be used for other purposes except for MBMS, such as relay and positioning. That is, an LTE-Advanced terminal can receive a nominal MBMS subframe and use service related information such as relay and positioning included in the subframe. If the LTE terminal can receive a nominal MBMS subframe, but the data included in the subframe is determined not to be associated with itself is not used.
  • the base station may transmit the subframe allocation information A so that both the LTE terminal and the LTE-Advanced terminal can receive.
  • the base station may transmit the subframe allocation information B to be received only to the LTE-Advanced terminal.
  • the base station may transmit the subframe allocation information C to be received only by the terminal receiving the MBMS.
  • the terminal 0 Since the terminal 0 does not receive the MBMS to the LTE terminal, it can receive only the subframe allocation information A. Although UE 0 receives subframe allocation information A, it is determined that the subframe indicated by subframe allocation information A is not related to itself and does not use this subframe. Accordingly, the base station and the terminal 0 may use only the subframes, that is, the subframes of the resource group A, except the subframe indicated by the subframe allocation information A among the entire subframes.
  • UE 1 may receive subframe allocation information A and subframe allocation information B.
  • FIG. Although the terminal 1 does not receive the MBMS, unlike the terminal 0, it determines that the subframe indicated by the subframe allocation information A is related to itself, and thus does not exclude the subframe. UE 1 does not exclude the subframe indicated by subframe allocation information A, but does not use all of the subframes indicated by subframe allocation information A.
  • FIG. the terminal 1 determines that the subframe indicated by the subframe allocation information B is related to the UE, and uses the subframe. Accordingly, the base station and the terminal 1 may use only the subframe of the resource group A and the subframe of the resource group B among the entire subframes.
  • Terminal 2 may receive the subframe allocation information A and the subframe allocation information C.
  • the terminal 2 determines that the subframe indicated by the subframe allocation information A is related to the terminal 2 and does not exclude the subframe.
  • UE 2 does not exclude the subframe indicated by subframe allocation information A, but does not use all of the subframes indicated by subframe allocation information A.
  • FIG. the terminal 2 determines that the subframe indicated by the subframe allocation information C is related to the subframe, and uses the subframe. Accordingly, the base station and the terminal 2 may use the subframe of the resource group A and the subframe of the resource group C among the entire subframes.
  • UE 3 may receive subframe allocation information A, subframe allocation information B, and subframe allocation information C.
  • UE 3 determines that the subframe indicated by subframe allocation information A is related to the UE, and does not exclude the subframe.
  • UE 3 does not exclude the subframe indicated by subframe allocation information A, but does not use all of the subframes indicated by subframe allocation information A.
  • the terminal 3 determines that the subframe indicated by the subframe allocation information B is related to the UE, and uses the subframe.
  • the terminal 3 determines that the subframe indicated by the subframe allocation information C is related to the UE, and uses the subframe. Accordingly, the base station and the terminal 3 may use the subframe of the resource group A, the subframe of the resource group B and the subframe of the resource group C among the entire subframes.
  • FIG. 5 is a flowchart of a radio resource allocation method according to an embodiment of the present invention.
  • each terminal group is composed of at least one terminal sharing characteristics.
  • subframe allocation information is configured for each terminal group using the identified information (S502).
  • the subframe allocation information thus configured is transmitted to at least one terminal.

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

Abstract

L'invention concerne un procédé permettant d'attribuer des ressources radio dans un système de communication sans fil. Des sous-trames qui utilisent uniquement un terminal particulier ou un groupe de terminaux particuliers sont attribuées en fonction de la période, du décalage et du nombre de sous-trames qui sont consécutivement utilisées, ou les sous-trames sont attribuées en fonction de la période, du décalage et du topogramme binaire pour des sous-trames qui sont disponibles à l'intérieur d'une ou de plusieurs trames, des ressources radio étant ainsi affectées efficacement.
PCT/KR2011/007071 2010-10-04 2011-09-27 Dispositif et procédé permettant d'attribuer des ressources radio dans un réseau de communication sans fil WO2012046970A2 (fr)

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US13/877,379 US20130188550A1 (en) 2010-10-04 2011-09-27 Device and method for allocating radio resources in wireless communication network

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KR20100096563 2010-10-04
KR10-2010-0096563 2010-10-04
KR1020110096821A KR20120035106A (ko) 2010-10-04 2011-09-26 무선 통신 네트워크에서 무선 자원을 할당하는 장치 및 방법
KR10-2011-0096821 2011-09-26

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CN108718464A (zh) * 2013-03-22 2018-10-30 华为技术有限公司 一种信号传输方法及设备
CN112073948A (zh) * 2014-08-08 2020-12-11 创新技术实验室株式会社 用于d2d通信的d2d数据资源的决定方法和装置

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US20090323646A1 (en) * 2003-10-15 2009-12-31 Qualcomm Incorporated Method and apparatus for wirless lan (wlan) data multiplexing
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CN108718464A (zh) * 2013-03-22 2018-10-30 华为技术有限公司 一种信号传输方法及设备
CN108718464B (zh) * 2013-03-22 2020-11-06 华为技术有限公司 一种信号传输方法及设备
CN112073948A (zh) * 2014-08-08 2020-12-11 创新技术实验室株式会社 用于d2d通信的d2d数据资源的决定方法和装置
CN112073948B (zh) * 2014-08-08 2024-05-28 思科***公司 用于d2d通信的d2d数据资源的决定方法和装置

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