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WO2015062528A1 - Procédé d'attribution de ressources de communication d2d, dispositif de station de base et équipement d'utilisateur - Google Patents

Procédé d'attribution de ressources de communication d2d, dispositif de station de base et équipement d'utilisateur Download PDF

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Publication number
WO2015062528A1
WO2015062528A1 PCT/CN2014/089951 CN2014089951W WO2015062528A1 WO 2015062528 A1 WO2015062528 A1 WO 2015062528A1 CN 2014089951 W CN2014089951 W CN 2014089951W WO 2015062528 A1 WO2015062528 A1 WO 2015062528A1
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WIPO (PCT)
Prior art keywords
resource
communication
base station
resources
user
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PCT/CN2014/089951
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English (en)
Chinese (zh)
Inventor
石绯
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Shanghai Langbo Communication Technology Co Ltd
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Shanghai Langbo Communication Technology Co Ltd
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Publication of WO2015062528A1 publication Critical patent/WO2015062528A1/fr
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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/51—Allocation or scheduling criteria for wireless resources based on terminal or device properties
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0446—Resources in time domain, e.g. slots or frames
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/53—Allocation or scheduling criteria for wireless resources based on regulatory allocation policies
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/14—Direct-mode setup

Definitions

  • the present invention relates to the field of D2D communication, and in particular, to a D2D communication resource allocation method, a base station device, and a user equipment.
  • D2D (Device-to-Device) communication is a kind of proximity communication service. It is studied in the Study Item of LTE-A Release 12 of 3GPP (The 3rd Generation Partnership Project), which needs to include public security and non-public security. Service mode, for scenarios with no cellular network coverage and cellular network coverage. In the scenario where there is cellular network coverage, the terminal needs to support both cellular communication and D2D communication. At the 74bis meeting of RAN1, some important features about D2D communication were standardized. It covers access methods, resource allocation and channel estimation design.
  • the current LTE-A uplink SC-FDMA mode is adopted as a benchmark for subsequent design.
  • TDM Time Division Multiplexing
  • control channel designed separately for the control signal, such as the PUCCH mode
  • the control signal is multiplexed on the data channel, similar to UCI loaded on the PUSCH, or the MAC layer or through the DM-RS.
  • an object of the present invention is to provide a D2D communication resource allocation method.
  • a D2D communication resource allocation method includes the following steps:
  • the network side allocates resources for all users who perform D2D communication, specifically: in the quasi-static manner, all the D2D users are sent by the base station to the user in the mode of cellular communication, and the cell broadcast signal or the terminal dedicated signal is used. The transmission is adjusted, and the allocation of the resource size is adjusted according to the usage condition reported by the D2D user to update the allocation of resources.
  • the mode of cellular communication means that the user is within the coverage of the cellular network.
  • the step A comprises any one or more of the following steps:
  • the base station notifies the D2D user it covers, allowing D2D transmission on certain subframes;
  • the base station allocates a part of the resource block RB for D2D transmission
  • the base station notifies the D2D users it covers, allowing D2D communication on certain resource blocks RB of certain subframes.
  • the step A1 comprises any one of the following steps:
  • the base station sends a series of 0, 1 sequence strings to the user, wherein "1" in the sequence string indicates that the subframe is a D2D subframe, and "0" is a cellular subframe, and the length of the sequence string indicates a minimum update period. ;
  • Step A12 setting the allocation mode of the D2D resources in each cycle is the same, that is, using a bitmap instruction of a fixed length N for resource allocation, the base station sends the user a position of "1" in the sequence of 0 and 1 sequences.
  • the sequence number i indicates that the i-th subframe is configured as a D2D resource in every subsequent N subframes.
  • the N is 40.
  • the step A2 comprises any one or more of the following steps:
  • Step A21 dividing the entire frequency band into a plurality of consecutive resource block groups, and then assigning a plurality of resource block groups to the user for D2D communication, wherein which resource block allocation is indicated by a bitmap indication of the number of resource block groups Is a D2D subframe;
  • Step A22 dividing the entire frequency band into a plurality of consecutive resource block groups, selecting a plurality of resource block groups, determining which resource blocks in each resource block group are allocated to the user for D2D transmission, and then indicating with two bitmaps Determining which resource blocks are allocated as D2D subframes, wherein a bitmap indicates a length of a resource block group, and another bitmap indicates a length that is a bitmap indication number included in the resource block group;
  • Step A23 indicating which resource blocks are allocated as D2D subframes by using a bitmap indication of the number of all resource blocks included in the entire uplink frequency band.
  • the method further comprises the following steps:
  • Step B Coordinating the D2D communication resources between the base stations, so that the D2D resources allocated by the neighboring base stations have resources overlapping in the time domain or the frequency domain.
  • the step B includes any one or any of the following steps:
  • step B1 a new entity is established, wherein the entity is located on the network side, and the entity allocates a common D2D resource pool to each base station, and requires each base station to ensure the resource location of the D2D resource pool when allocating D2D resources. ;
  • Step B2 establishing signaling of the D2D resource configuration mode between the base stations, specifically: the interaction between the base stations through the D2D resource allocation location, to determine whether the D2D resources overlap, and if so, maintaining the current D2D resources between the base stations. Allocation mode, otherwise, one of the base stations changes its D2D resource allocation mode to ensure overlap with D2D resources between another base station.
  • the method further comprises the following steps:
  • Step C coordinating D2D communication resources between different D2D user pairs or user groups, wherein each D2D transmission user is assigned to an independent D2D identification number that does not conflict with other users.
  • the step C comprises the following steps:
  • Step C1 The receiver of each D2D pair or the D2D group transmission periodically reports the D2D data reception status report to the base station on the resources of the cellular communication, where the report needs to include the location of the received D2D data, the sender ID, and Any one or more of the quality indications, SNR indications;
  • Step C2 recommending a resource pool for each sending user to perform D2D transmission, and the resource pool must contain In the first part of the resource indication for all D2D transmissions, it is a subset.
  • the method further comprises the following steps:
  • the base station separately allocates resources for control information transmitted by the D2D.
  • the step D includes any one or more of the following steps:
  • step D1 dividing the entire frequency band into a plurality of consecutive resource block groups, and then assigning a plurality of resource block groups to the user for control information transmission for D2D communication;
  • Step D2 dividing the entire frequency band into a plurality of consecutive resource block groups, selecting a plurality of resource block groups, determining which resource blocks in each resource block group are control information allocated to the user for D2D transmission, and further using two bits
  • the indication indicates that the length of one bitmap indication is the number of resource block groups, and the length indicated by another bitmap is the number of bitmap indications included in the resource block group;
  • Step D3 a bitmap indication of the number of all resource blocks included in the entire UL band, for indicating resources used for D2D communication control information transmission.
  • the invention discloses a base station device, and the base station device comprises:
  • the first module is configured to send a cell broadcast signal or a terminal dedicated signal to all D2D users in a mode of cellular communication to allocate resources in a quasi-static manner, and adjust the configured resource size according to the usage condition reported by the D2D user. Update resource allocation
  • the first module of the foregoing base station device is further used for at least one of the following:
  • the invention discloses a user equipment, and the user equipment comprises:
  • the second module is configured to receive a cell broadcast signal or a terminal dedicated signal in a quasi-static manner to obtain a D2D allocation resource.
  • the second module of the user equipment is further used for at least one of the following:
  • the present invention has the following beneficial effects:
  • the cellular network allocates resources by D2D communication through frequency division multiplexing, time division multiplexing, or a combination of the two. All D2D related transmissions can only be transmitted on this allocated resource. In this way, while ensuring simultaneous transmission of D2D communication and cellular communication, the interference that may occur between the two communication modes is also reduced.
  • the present invention is also designed for inter-cell D2D communication resource allocation and resource allocation between D2D pairs or D2D groups, ensuring reliability of D2D communication between cells, and reducing transmission between D2D pairs or D2D groups. interference.
  • the physical resource block to be detected is further reduced by the indication of the network side or the cell, thereby reducing the complexity of the terminal implementing D2D communication.
  • the design modules of the present invention are base stations and terminal devices.
  • the specific invention points are as follows:
  • the first part is for the network side to allocate resources for all users who perform D2D communication.
  • the resource allocation mode is sent by the base station to all D2D users in a mode of cellular communication in a quasi-static manner, and may be transmitted by using a cell broadcast signal or a terminal dedicated signal.
  • the resource allocation can be adjusted according to the usage reported by the D2D user to update the resource allocation.
  • the first is Time Division Multiplexing (TDM), in which the base station tells all users or part of the D2D users it covers, which can perform D2D transmission on certain subframes.
  • TDM Time Division Multiplexing
  • the first example is a way in which a bitmap indicates a bitmap, that is, the base station sends a series of 0 and 1 sequence strings to the user, and the sequence thereof A "1" in the column string indicates that the subframe is a D2D subframe, and "0" is a cellular subframe.
  • the length of the sequence string indicates the minimum update period.
  • the minimum sequence string length based on bitmap is 40 (corresponding to 40 ms)
  • the distance is as follows, if the sequence is
  • the corresponding 5th, 20th, 22th, 35th and 40th subframes are D2D subframes, and the rest are cellular subframes.
  • the second example uses a shorter sequence to represent the position of the D2D subframe.
  • the D2D resource is allocated in the same way every 8ms, that is, using an 8-bit bitmap.
  • the resource allocation for example, the sequence is “00001000”, and the fifth subframe is configured as a D2D resource for every subsequent 8 subframes.
  • the UE User Equipment
  • the D2D subframe is mute (referred to by mute, which is considered to be a cellular communication subframe), and the D2D subframe is returned as a cellular subframe, similar to some subframes being dynamic. Switch between D2D and subframe. For example, if an SF must transmit ACK/NACK or retransmit, the corresponding D2D frame is degraded to a cellular frame.
  • the base station allocates part of the resource block RB for D2D transmission.
  • the base station allocates part of the resource block RB for D2D transmission.
  • the first example is a grouping method, that is, dividing the entire frequency band into a plurality of consecutive resource block groups (RB groups), and then assigning one or several resource block groups to the user for D2D communication, so that only the number of resource block groups is required.
  • the bitmap can be used to indicate this information.
  • the second example is a double bitmap indicating the grouping mode, that is, in addition to selecting one or several resource block groups, it is also necessary to determine that those RBs in each resource block group are allocated to the user for D2D transmission, and here each assumes The resource blocks in the resource block group are the same location and number of resource blocks used for D2D transmission. Therefore, two bitmaps are required for indication, a bitmap whose length is the number of resource block groups, and a bitmap whose length is the number of RBs included in the resource block. The specific indication is still "1" for D2D and "0" for cellular communication.
  • the third example is an uplink full-band packet mode, that is, using all the RB number bitmaps included in the entire uplink (UL) frequency band to indicate which resource blocks are allocated to the user for D2D transmission, that is, which resource blocks are allocated as D2D sub- frame.
  • a bitmap indication is designed with the length of all the RBs in the entire uplink frequency band as the length, and the position of the "1" in the bitmap indication is the D2D resource pool RB position. For example, if there are 10 RBs in the uplink, the bit length indicated by the bitmap is 10, and if the 1st and 3rd RBs are allocated as D2D subframes, the bitmap is 1010000000.
  • TDM i means using the i-th example in the TDM mode described above
  • FDM j means using the j-th instance in the FDM mode described above, i is 1 Or 2, j is 1, 2 or 3):
  • TDM 1+FDM 1 The real-time domain adopts a bitmap indication (bitmap), and the frequency domain adopts a packet mode, that is, among those subframes indicated by the time domain bitmap, one or several resource blocks.
  • bitmap bitmap
  • the group is assigned to the user for D2D communication;
  • TDM 1+FDM 2 The real-time domain adopts a bitmap indication, and the frequency domain uses two bitmap indications, that is, those sub-frames indicated by the time domain bitmap, one or several of them. Some RBs in the resource block group are allocated to the user for D2D communication;
  • TDM1+FDM3 The bitmap in the real-time domain is in the form of a bitmap, and the bitmap indication of all the RBs included in the entire UL frequency band in the frequency domain means that in the subframes indicated by the time domain bitmap, Only the bitmap indicates that the indicated RB is allocated to the user for D2D communication;
  • TDM 2+FDM 1 The real-time domain adopts a short bitmap indication (bitmap), and the frequency domain adopts a packet mode, that is, those sub-frames indicated by the short-term bitmap in the time domain, one or several of which are The resource block group is allocated to the user for D2D communication;
  • TDM 2+FDM 2 The short-term bitmap is used in the real-time domain, and the two-map indication is used in the frequency domain, that is, in those subframes indicated by the short-term bitmap in the time domain, one of them or Some RBs in several resource block groups are allocated to users for D2D communication;
  • TDM2+FDM3 The short-term bitmap is used in the real-time domain, and the bitmap indication of all RBs included in the entire UL-band of the frequency domain indicates those subframes indicated in the short-term bitmap in the time domain. Among them, only the bitmap indicates that the indicated RB is allocated to the user for D2D communication.
  • the second part is the coordination of D2D communication resources between base stations.
  • D2D resources allocated by the neighboring base stations need to have overlapping resources in the time domain or the frequency domain. This guarantee can be achieved in two ways.
  • the first example is to design a new entity, similar to the inter-base-station D2D resource scheduling entity, which is located on the network side. It allocates a common D2D resource pool to each base station, and requires each base station to ensure that the resource is covered when allocating D2D resources. The resource location of the pool.
  • the specific configuration mode can also be divided into TDM, FDM or TDM+FDM. Specifically:
  • TDM Time Division Multiplexing
  • the first example is a bitmap indicating the manner of the bitmap, that is, the new entity sends a series of 0 and 1 sequence strings to all the base stations it covers, and a “1” in the sequence string indicates that the subframe must be a D2D subframe. And "0" is a cellular subframe.
  • the length of the sequence string indicates the minimum update period.
  • the minimum sequence string length based on bitmap is 40 (corresponding to 40 ms)
  • the distance is as follows, if the sequence is
  • the corresponding 5th, 20th, 22th, 35th and 40th subframes are D2D subframes, and the rest are cellular subframes.
  • the second example uses a shorter sequence to indicate the location that must be allocated as a D2D subframe.
  • the D2D resource is allocated the same way every 8ms, that is, using an 8-bit bitmap.
  • the sequence is "00001000"
  • the fifth subframe is configured as a D2D resource.
  • the first example is a grouping method, which divides the entire frequency band into a number of consecutive resource block groups (RB groups), and then uses one or several resource block groups as resource pools, so that only the number of resource block groups is required. This information can be indicated.
  • the second example is that in addition to selecting one or several resource block groups, it is also necessary to determine which RBs in each resource block group are D2D resource pools.
  • each resource block group is the same location and number of resources.
  • the block is used for D2D transmission, so two bitmaps are required for indication, a bitmap whose length is the number of resource block groups, and a bitmap whose length is the number of RBs included in the resource block.
  • the specific indication is still "1" for the D2D resource pool and "0" for cellular communication.
  • a third example is to use a bitmap of all RB numbers included in the entire uplink (UL) band to indicate which resource blocks are allocated to the user for D2D transmission, that is, which resource blocks are allocated as D2D subframes.
  • a bitmap is designed with the length of all the RBs in the entire uplink frequency band as a length, and the position of "1" in the bitmap is the D2D resource pool RB position. For example, if there are 10 RBs in the uplink, the bit length indicated by the bitmap is 10, and if the 1st and 3rd RBs are allocated as D2D subframes, the bitmap is 1010000000.
  • TDM i means using the i-th example in the TDM mode described above
  • FDM j means using the j-th instance in the FDM mode described above, i is 1 Or 2, j is 1, 2 or 3):
  • TDM 1+FDM 1 The real-time domain adopts a bitmap indication (bitmap), and the frequency domain adopts a packet mode, that is, among those subframes indicated by the time domain bitmap, one or several resource blocks.
  • the group is assigned to the D2D resource pool;
  • TDM 1+FDM 2 The real-time domain adopts a bitmap indication, and the frequency domain uses two bitmap indications, that is, those sub-frames indicated by the time domain bitmap, one or several of them. Some RBs in the resource block group are allocated to the D2D resource pool;
  • TDM1+FDM3 The bitmap in the real-time domain is in the form of a bitmap, and the bitmap indication of all the RBs included in the entire UL frequency band in the frequency domain means that in the subframes indicated by the time domain bitmap, Only the bitmap indicates that the indicated RB is allocated to the D2D resource pool;
  • TDM 2+FDM 1 The real-time domain adopts a short bitmap indication (bitmap), and the frequency domain adopts a packet mode, that is, those sub-frames indicated by the short-term bitmap in the time domain, one or several of which are The resource block group is allocated to the D2D resource pool;
  • TDM 2+FDM 2 The short-term bitmap is used in the real-time domain, and the two-map indication is used in the frequency domain, that is, in those subframes indicated by the short-term bitmap in the time domain, one of them or Some RBs in several resource block groups are allocated to the D2D resource pool;
  • TDM2+FDM3 The short-term bitmap is used in the real-time domain, and the bitmap indication of all RBs included in the entire UL-band of the frequency domain indicates those subframes indicated in the short-term bitmap in the time domain. Among them, only the bitmap indicates that the indicated RB is allocated to the D2D resource pool.
  • the second example is signaling for designing an inter-base station interactive D2D resource configuration manner, similar to the D2D resource configuration mode sent by the base station 1 to the base station 2. If the D2D resource configured by the base station 2 overlaps with the base station 1, the confirmation information is fed back. Then, the configuration information is transmitted to the base station 1 to perform adjustment by the base station 1.
  • the third part is the coordination of D2D communication resources between different D2D user pairs or user groups.
  • the first resource allocation method is to distinguish the resources of the D2D user and the cellular user to reduce the interference, and the resource allocation between different D2D user pairs or user groups is not designed, and interference between different D2D user pairs or user groups still exists. Based on this, we present a resource allocation method based on different D2D user pairs or user groups to reduce interference. It should be emphasized here that we assume that each D2D transmission user is assigned to an independent and not to other users. Conflicting D2D identification number ID (similar to using a unique C-RNTI).
  • the first step is that the receiver of each D2D pair or D2D group transmission can report the D2D data reception status report to the base station periodically (statically or semi-statically) on the resources of the cellular communication, and the report needs to include the received D2D data.
  • the location (compared to the way the prefer FDM is indicated), the sender's ID, and the quality indicator (good or bad indication, or SNR indication).
  • the "indirect indication mode of the refer to the FDM” refers to the preference of the FDM mode, that is, the implementation of the implementation mode 2: FDM mode, that is, the user indicates the grouping by means of grouping and double bitmap.
  • the mode or the uplink full-band packet mode indicates the location at which the D2D data is received.
  • the second step is that the base station can recommend a resource pool for each transmitting user to perform D2D transmission based on the first step.
  • the resource pool must be included in the resource indication of all D2D transmissions in the first part, and all the D2D users are allocated to the base station. A subset of the resources (compared to the way the prefer FDM is indicated).
  • the fourth part allocates resources for the control information of the D2D transmission by the base station separately.
  • D2D Communication control information has begun to consider the transmission problem of D2D Communication control information. Considering the complexity of the UE, it is reasonable for each D2D receiving UE to perform control signaling detection on all allocated D2D resources, so the eNB (Evolved Base Station) It should also inform all D2D user control signaling specific transmission locations.
  • the specific signaling mode can be similar to the FDM-based packet-based intra-group indication (two bitmaps).
  • the indicated resources should be included in all D2D transmission resources. For all users, if they work according to the current cellular transmission mode, before receiving D2D data, only the control information that may exist on the indicated RBs is required, instead of the control information on all resources.

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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 d'attribution de ressources de communication D2D, une station de base et un équipement d'utilisateur. Le procédé comprend les étapes suivantes consistant à : étape A, attribuer, au moyen d'un côté réseau, des ressources à tous les utilisateurs effectuant une communication D2D, consistant plus précisément à : émettre, au moyen d'une station de base, à destination de tous les utilisateurs D2D en mode quasi statique lorsque les utilisateurs sont dans un mode de communication cellulaire, émettre en utilisant un signal de diffusion de cellule ou un signal spécifique à un terminal et, d'après la condition d'utilisation rapportée par les utilisateurs D2D, régler la taille des ressources de configuration de façon à mettre à jour l'attribution des ressources. La présente invention permet également de réduire les interférences qui peuvent exister entre deux sortes de communication tout en garantissant l'émission simultanée d'une communication D2D et d'une communication cellulaire, de garantir la fiabilité de la communication D2D entre cellules et de réduire les interférences d'émission entre paires D2D ou groupes D2D, et de plus, en ce qui concerne un canal de commande de la communication D2D, de réduire encore les blocs de ressource physique qu'il est nécessaire de détecter au moyen d'une indication d'un côté réseau ou d'une cellule, ce qui simplifie pour le terminal l'exécution d'une communication D2D.
PCT/CN2014/089951 2013-10-31 2014-10-30 Procédé d'attribution de ressources de communication d2d, dispositif de station de base et équipement d'utilisateur Ceased WO2015062528A1 (fr)

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JP6704616B2 (ja) * 2015-09-18 2020-06-03 華為技術有限公司Ｈｕａｗｅｉ Ｔｅｃｈｎｏｌｏｇｉｅｓ Ｃｏ．，Ｌｔｄ． 制御情報伝送方法、送信端、および受信端
CN106686728B (zh) * 2015-11-06 2020-05-26 展讯通信（上海）有限公司 时频资源分配方法及装置
CN105357716B (zh) * 2015-12-10 2019-04-02 北京北方烽火科技有限公司 一种资源分配方法及装置
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