WO2017128878A1 - Procédé d'attribution de ressource, dispositif côté réseau, terminal et support de stockage informatique - Google Patents

Procédé d'attribution de ressource, dispositif côté réseau, terminal et support de stockage informatique Download PDF

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Publication number
WO2017128878A1
WO2017128878A1 PCT/CN2016/109718 CN2016109718W WO2017128878A1 WO 2017128878 A1 WO2017128878 A1 WO 2017128878A1 CN 2016109718 W CN2016109718 W CN 2016109718W WO 2017128878 A1 WO2017128878 A1 WO 2017128878A1
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Prior art keywords
resource
uplink
uplink scheduling
scheduling information
information
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PCT/CN2016/109718
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English (en)
Chinese (zh)
Inventor
王文焕
朱思真
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中兴通讯股份有限公司
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Publication of WO2017128878A1 publication Critical patent/WO2017128878A1/fr

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    • 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]
    • H04W28/26—Resource reservation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/12—Wireless traffic scheduling
    • H04W72/1263—Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows
    • H04W72/1268—Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows of uplink data flows
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/12—Wireless traffic scheduling
    • 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
    • H04W76/00—Connection management
    • H04W76/20—Manipulation of established connections
    • H04W76/27—Transitions between radio resource control [RRC] states
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/40—Connection management for selective distribution or broadcast

Definitions

  • V2X Vehicle-to-the-air
  • V2X Vehicle-to-the-air
  • V2I/N Vehicle-to-Infrastructure/Network
  • V2P Vehicle-to-Person
  • R12, Release 12 The difference between V2X communication and the device-to-device (D2D) communication in version 12 (R12, Release 12) is that the moving speed is increased, the user density is increased, the reliability requirement is high, and the real-time response is characterized.
  • D2D communication does not have to consider the above high demand. Therefore, the existing mechanism of D2D communication cannot meet the requirements of V2X communication, and must be optimized according to the characteristics of V2X.
  • FIG. 1 is a schematic diagram of an application scenario of the prior art; as shown in FIG. 1, a user equipment (UE, User Equipment) first sends a V2X information to an evolved unified terrestrial radio in an uplink (UL). An E-UTRAN (Evolved Universal Terrestrial Radio Access Network), and then the E-UTRAN transmits this V2X information on the downlink (DL) to multiple UEs within the coverage.
  • the uplink data transmission of the existing long-term evolution (LTE) network UE is usually performed by the evolved base station (eNB, eNodeB) through dynamic scheduling or semi-persistent scheduling. When the UE has uplink data transmission, there is no uplink scheduling information.
  • LTE long-term evolution
  • UL grant usually sends an uplink data request by the uplink scheduling (SR) request.
  • SR uplink scheduling
  • the eNB After receiving the SR request, the eNB usually allocates sufficient resources for the UE to send a buffer status report (BSR), and then the UE is The uplink BSR tells the eNodeB how much data is sent in the buffer, so that the eNB decides how much uplink to allocate to the UE.
  • Resources For V2X business requirements, especially event-triggered services, the business requirements are immediately after the trigger, and the delay requirements are extremely high, while the current mechanism's resource request process takes a long time. Therefore, how to reduce the access delay of the V2X low-latency service based on the Uu interface and meet the requirements of the V2X communication, there is currently no effective solution in the prior art.
  • the embodiments of the present invention provide a resource configuration method, a network side device, a terminal, and a computer storage medium.
  • the network side device allocates the uplink resource of the low-latency service by using the configuration or the reservation mode, and generates the uplink scheduling information based on the allocated uplink resource, including:
  • the network device After the network side device allocates the uplink resource of the normal service, the network device allocates the remaining uplink resource to the low-latency service, and generates at least one uplink scheduling information based on the allocated uplink resource.
  • the network side device allocates the uplink resource
  • the part of the uplink resource is reserved for the low-latency service, and the at least one uplink scheduling information is generated according to the allocated uplink resource
  • the network side device pre-configures the fixed uplink resource allocation to the low-latency service, and generates at least one uplink scheduling information based on the allocated uplink resource.
  • the sending the uplink scheduling information includes:
  • the uplink scheduling information is sent by using a Physical Downlink Control Channel (PDCCH), where the uplink scheduling information is sent in a preset format and is scrambled based on the preset identifier.
  • PDCCH Physical Downlink Control Channel
  • the preset format of the uplink scheduling information includes: format0, format4, or format X;
  • the format X includes at least a frequency domain resource indication and a time domain resource indication.
  • the frequency domain resource indicates a bitmap including an uplink bandwidth available resource group number or a resource group serial number and a resource group number of the sending resource;
  • the time domain resource includes the number of consecutive uplink subframes available to the frequency domain resource.
  • the preset identifier is at least one set of wireless network temporary identifiers for the low latency service.
  • the method before the sending the uplink scheduling information, the method further includes: sending the preset identifier by using a broadcast message;
  • RRC radio resource control
  • the preset identifier is pre-configured in a predefined manner.
  • the at least one uplink scheduling information includes resource location information and control information for indicating the low latency service or different services.
  • the uplink scheduling information when the uplink scheduling information is scrambled by different preset identifiers, the uplink scheduling information is sent in the same or different period.
  • the fixed uplink resource generates at least one uplink scheduling information and is sent by using a broadcast message
  • the uplink scheduling information of the fixed uplink resource is pre-configured in a predefined manner.
  • the searching and obtaining uplink scheduling information includes:
  • Searching for a common search space of the PDCCH, or a specific search space of the terminal, or a dedicated search space of the low-latency service obtains uplink scheduling information.
  • the method before the obtaining the uplink scheduling information, the method further includes: the terminal obtaining a preset identifier by using a broadcast message; or obtaining a preset identifier by using RRC signaling; or obtaining a pre-configured manner by using a predefined manner.
  • Default identifier by using a broadcast message; or obtaining a preset identifier by using RRC signaling; or obtaining a pre-configured manner by using a predefined manner.
  • the method further includes: descrambling the uplink scheduling information based on the preset identifier, and obtaining uplink scheduling allocation information of the low-latency service.
  • the embodiment of the present invention further provides a network side device, where the network side device includes: an allocation module and a sending module;
  • the sending module is configured to send uplink scheduling information generated by the allocation module.
  • the reserved uplink resource is allocated to the low-latency service, and the at least one uplink scheduling information is generated based on the allocated uplink resource;
  • the fixed uplink resource is allocated to the low-latency service, and at least one uplink scheduling information is generated based on the allocated uplink resource.
  • the sending module is configured to send the uplink scheduling information by using a PDCCH, where the uplink scheduling information is sent in a preset format, and is scrambled based on the preset identifier.
  • the preset format includes: format0, format4, or format X;
  • the format X includes at least a frequency domain resource indication and a time domain resource indication.
  • the frequency domain resource indicates a bitmap including an uplink bandwidth available resource group sequence number or a resource group serial number and a resource group number of the sending resource;
  • the time domain resource includes the number of consecutive uplink subframes available to the frequency domain resource.
  • the sending module is further configured to: send the preset identifier by using a broadcast message before sending the uplink scheduling information; or send the preset identifier by using RRC signaling;
  • the allocation module is configured to pre-configure the preset identifier in a predefined manner.
  • the at least one uplink scheduling information includes resource location information and control information for indicating the low latency service or different services.
  • the fixed uplink resource generates at least one uplink scheduling information and is sent by using a broadcast message
  • the uplink scheduling information of the fixed uplink resource is pre-configured in a predefined manner.
  • the embodiment of the present invention further provides a terminal, where the terminal includes: an obtaining unit, a processing unit, and a sending unit;
  • the obtaining unit is configured to: after receiving the trigger indication of the low-latency service, search and obtain uplink scheduling information;
  • the processing unit is configured to determine uplink scheduling allocation information based on the uplink scheduling information obtained by the obtaining unit;
  • the sending unit is configured to send information according to an uplink scheduling allocation information determined by the processing unit.
  • the obtaining unit is further configured to: before obtaining uplink scheduling information, Obtaining a preset identifier by using a broadcast message; or obtaining a preset identifier by using RRC signaling;
  • the processing unit is configured to descramble the uplink scheduling information based on the preset identifier obtained by the obtaining unit, to obtain uplink scheduling allocation information of the low-latency service, or configured as a pre-configured preset identifier solution.
  • the uplink scheduling information is scrambled to obtain uplink scheduling allocation information of the low-latency service.
  • the sending unit is configured to send information according to the uplink scheduling allocation information through a Uu interface or a PC5 interface.
  • the embodiment of the present invention further provides a computer storage medium, where the computer storage medium is stored with computer executable instructions, and the computer executable instructions are configured to perform the configuration in the network side device as described in the embodiment of the present invention. Resource configuration method.
  • the embodiment of the present invention further provides a computer storage medium, where the computer storage medium is stored with computer executable instructions, and the computer executable instructions are configured to perform resource configuration in the terminal, which should be configured in the embodiment of the present invention. method.
  • the resource configuration method, the network side device, the terminal, and the computer storage medium provided by the embodiment of the present invention include: the network side device allocates the uplink resource of the low latency service by using the configuration or the reservation mode; and generates the uplink based on the allocated uplink resource. Scheduling information, and transmitting the uplink scheduling information.
  • the technical solution of the embodiment of the present invention is used to allocate uplink resources for a low-latency service (for example, a trigger service) in a pre-configured or reserved manner, and can be directly used when there is a communication demand for a low-latency service on the uplink.
  • the uplink resource request process is reduced, the request time of the uplink resource is shortened, and the control signaling overhead of the related uplink resource application and the network side device interaction is reduced, which satisfies the low delay requirement of the V2X communication.
  • FIG. 1 is a schematic diagram of an application scenario of the prior art
  • FIG. 3 is a schematic diagram of a downlink control channel according to an embodiment of the present invention.
  • FIG. 4 is a schematic structural diagram of a frame of an LTE system according to an embodiment of the present invention.
  • FIG. 5 is a schematic structural diagram of a physical resource block (PRB) of an LTE system according to an embodiment of the present invention
  • 6a and 6b are schematic diagrams of resource group division according to an embodiment of the present invention.
  • FIG. 7 is a schematic flowchart diagram of a resource configuration method according to Embodiment 2 of the present invention.
  • FIG. 8 is a schematic structural diagram of a network side device according to an embodiment of the present invention.
  • FIG. 9 is a schematic structural diagram of a terminal of an embodiment of the present invention.
  • the embodiment of the invention provides a resource configuration method.
  • 2 is a schematic flowchart of a resource configuration method according to Embodiment 1 of the present invention; as shown in FIG. 2, the resource configuration method includes:
  • Step 201 The network side device allocates uplink resources of the low latency service by using a configuration or a reservation mode.
  • the network side device includes at least one of the following: an evolved base station (eNB), a relay station (RN), a cell coordination entity (MCE), a gateway (GW), and a mobility management device (MME).
  • eNB evolved base station
  • RN relay station
  • MCE cell coordination entity
  • GW gateway
  • MME mobility management device
  • an eNB is used as a network side device as an example for describing an evolved universal terrestrial radio access network (EUTRAN) operation management and maintenance (OAM) manager.
  • EUTRAN evolved universal terrestrial radio access network
  • OAM operation management and maintenance
  • the network side device allocates the uplink resource of the low-latency service by using the configuration or the reservation mode, and the network-side device allocates the remaining uplink resource to the low-latency service after allocating the uplink resource of the normal service; Or, the network side device allocates a part of the uplink resource to the low-latency service when the uplink resource is allocated; or the network-side device pre-configures the fixed uplink resource to be allocated to the low-latency service.
  • the fixed uplink resource is sent by using a broadcast message; or pre-configured by a predefined manner.
  • the fixed uplink resource may be located on a Physical Uplink Shared Channel (PUSCH), which may be a continuous or discontinuous allocation, and the generated uplink scheduling information may be sent by using a broadcast message;
  • PUSCH Physical Uplink Shared Channel
  • MCS Modulation and Coding Scheme
  • Step 202 Generate uplink scheduling information based on the allocated uplink resources, and send the uplink scheduling information.
  • the generating the uplink scheduling information based on the allocated uplink resource includes: generating at least one uplink scheduling information based on the allocated uplink resource.
  • the sending the uplink scheduling information includes: sending the uplink scheduling information by using a PDCCH.
  • FIG. 3 is a schematic diagram of a downlink control channel according to an embodiment of the present invention; as shown in FIG. 3, a Physical Control Format Indicator Channel (PCFICH) is used to indicate a control area size (ie, including several Orthogonal Frequency Division Multiplexing (OFDM) symbol; Physical Hybrid ARQ Indicator Channel (PHICH) is used to support Uplink Hybrid Automatic Repeat Request (HARQ); Physical Downlink Control Channel (PDCCH, Physical) Downlink Control Channel), the remaining resources in the control area after the PCFICH/PHICH is removed are used for the PDCCH, and the PDCCH is used to carry the uplink/downlink traffic channel resource allocation signaling, rate control signaling, etc., indicating how the uplink/downlink traffic channel works, and It is used to carry uplink power control signaling, which is collectively referred to as uplink/downlink scheduling information.
  • PCFICH Physical Control Format In
  • the uplink scheduling information of the uplink resource that includes the low-latency service sent by the network side device in the embodiment is carried by the PDCCH.
  • the smallest unit of frequency domain resource allocation is a resource block (RB, Resource Block), and a physical resource block corresponding to a physical resource (PRB, Physical Resource) Block).
  • a PRB contains 12 subcarriers in the frequency domain, corresponding to one slot in the time domain.
  • a resource corresponding to one subcarrier on each Orthogonal Frequency Division Multiplexing (OFDM) symbol is called a resource unit (RE, Resource Element), as shown in Figure 5.
  • OFDM Orthogonal Frequency Division Multiplexing
  • the uplink scheduling information is sent in a preset format, and is scrambled based on the preset identifier.
  • the preset format includes: format0, format4, or format X.
  • the format X is a new format in the embodiment of the present invention; the format X includes at least a frequency domain resource indication and a time domain resource indication.
  • the frequency domain resource indicates a bitmap including an uplink bandwidth available resource group sequence number or a resource group sequence number of the transmission resource and a number of resource groups;
  • the time domain resource includes a subframe in which the frequency domain resource is available and a subsequent uplink subframe. The number of frames.
  • the existing format0/format4 can only indicate consecutive or two discontinuous resources, and cannot use the remaining resources well.
  • the indication mode 1 may be the bitmap mode of all the physical resource groups (RBGs), that is, the resources available for the uplink bandwidth are numbered 0 to N according to the group, and each group includes P PRBs. A resource is indicated by a bitmap. If the bit is indicated by a bit, the resource is allocated to the low-latency service user.
  • RBGs physical resource groups
  • the new formatX may indicate a plurality of non-contiguous subframe resources.
  • the existing format0 and format4 have fixed-time subframes, so there is no overhead of the time domain subframe.
  • the FDD UE receives the PDCCH in the subframe n.
  • the PUSCH is transmitted on the corresponding resource of the subframe n+4, and the TDD transmits the PUSCH on the corresponding resource of the subframe n+k when the subframe receives the PDCCH, and the k protocol is defined according to different configurations.
  • FormatX can be used for multiple data packet transmission or retransmission of low-latency services, that is, design parameter L, that is, if there is a parameter L, it means that for FDD, receiving PDCCH in subframe n is at n+4 and subsequent L-1.
  • the uplink resources of the subframes can be used for the transmission or retransmission of low-latency services.
  • a new formatX format is used for the resource indication mode 3, and a combination indication manner of the RBG start index and the RBG number is adopted.
  • the total number of resource blocks indicating the uplink system bandwidth is 25, and the resource blocks allocated to the UE are PRB 2, PRB 3, PRB 12, PRB 13, and PRB 24.
  • the at least one uplink scheduling information includes resource location information and control information for indicating the low latency service or different services.
  • the uplink scheduling information that is sent is one
  • the uplink scheduling information may be scrambled by using a preset identifier (for example, a V-RNTI), and used to represent the low-latency service.
  • a preset identifier for example, a V-RNTI
  • the uplink scheduling information is sent to at least two
  • the at least two uplink scheduling information may be respectively scrambled by using at least two preset identifiers, and each uplink scheduling information respectively represents different services.
  • the at least one preset identifier (for example, a V-RNTI) may be determined according to a service level, or determined according to a service data packet size, or determined by a user group, and the like.
  • the uplink scheduling information is configured to be the same or Send in different cycles.
  • the low-latency service may be an event-triggered service, such as a V2X event-triggered service.
  • an uplink resource is allocated for a low-latency service (that is, a trigger service) in a pre-configured or reserved manner, and can be directly used when the uplink has a low-latency service communication requirement, thereby reducing the uplink.
  • the resource request process shortens the request time of uplink resources.
  • the control signaling overhead of the related uplink resource application and the network side device interaction is reduced, and the low delay requirement of the V2X communication is satisfied.
  • the embodiment of the invention further provides a resource configuration method.
  • 4 is a schematic flowchart of a resource configuration method according to Embodiment 2 of the present invention; as shown in FIG. 4, the method includes:
  • Step 301 After receiving the trigger indication of the low-latency service, the terminal searches for and obtains uplink scheduling information.
  • the searching and obtaining the uplink scheduling information includes: searching a common search space of the PDCCH, or a specific search space of the terminal, or a dedicated search space of the low-latency service to obtain uplink scheduling information.
  • the dedicated search space of the low latency traffic may be a specific number of locations on a particular symbol.
  • the method further includes: descrambling the uplink scheduling information according to the preset identifier, and obtaining uplink scheduling allocation information of the low-latency service.
  • the uplink scheduling allocation information includes resource location information and control information.
  • the preset identifier is at least one set of wireless network temporary identifiers for the low latency service.
  • the wireless network temporary identifier may specifically be a wireless network temporary identifier (V-RNTI) for the low latency service.
  • V-RNTI can be obtained by pre-configuration in a predefined manner, or obtained by using a broadcast message, or by using an RRC letter when the terminal establishes a V2X link with the network side device. Get it.
  • the terminal After obtaining the V-RNTI, the terminal searches for the PDCCH after receiving the trigger indication of the low-latency service, or searches for a specific search space in the common search space, or the terminal, or the dedicated search of the low-delay service. Spatial search for available upstream scheduling information. After obtaining the uplink scheduling information, the V-RNTI performs decoding to obtain uplink scheduling allocation information.
  • Step 302 Determine uplink scheduling allocation information based on the uplink scheduling information, and send information according to the uplink scheduling allocation information.
  • an uplink resource is allocated for a low-latency service (that is, a trigger service) in a pre-configured or reserved manner, and can be directly used when the uplink has a low-latency service communication requirement, thereby reducing the uplink.
  • the resource request process shortens the request time of the uplink resource, reduces the control signaling overhead of the related uplink resource application and the network side device interaction, and satisfies the low delay requirement of the V2X communication.
  • the resource configuration method of the embodiment of the present invention is described in detail below with the network side device as the base station (eNB) and the terminal as the V2X terminal as an example.
  • the embodiment of the invention further provides a resource configuration method.
  • the V2X terminal performs information transmission based on the uplink resources pre-configured by the base station and based on the Uu link (ie, the link of the Vehicle to the eNodeB).
  • the base station sends the pre-configured related information, where the pre-configured related information may be carried by the PDCCH, where the format of the PDCCH may be format0, format4, or a new format formatX, and the PDCCH carrying the specific information is pre-defined.
  • V-RNTI scrambling the V-RNTI notifying the V2X terminal in the coverage area by using a broadcast message; or transmitting to the V2X terminal through RRC signaling when the V2X link is established by the base station and the V2X terminal; or It can be pre-configured in a predefined way.
  • the pre-configured related information includes a V-RNTI for descrambling the uplink scheduling information by the V2X terminal, and the number of the V-RNTIs may be at least one group.
  • the V2X terminal is in uplink synchronization, and needs to send uplink information to the base station, but has no uplink resources, and obtains uplink resources for communication through the uplink scheduling information (UL Grant) pre-configured by the base station.
  • the PDCCH may carry the uplink scheduling information of the uplink resource that is allocated by the base station to the low-latency service, where the uplink scheduling information may be carried by the PDCCH, and the carried information is DCI, and is used to indicate the uplink scheduling that the V2X terminal can use. Assign information.
  • the uplink scheduling information may be located in a common search space of the PDCCH, or a specific search space of the terminal, or a dedicated search space of the low latency service.
  • the format of the uplink scheduling information transmission may be format 0 or format 4; where format0 and format4 are used to indicate uplink resource configuration of the Uu link; and the format of the uplink scheduling information transmission may also be a new transmission.
  • a format such as format X
  • the format X includes at least a frequency domain resource indication and a time domain resource indication;
  • the frequency domain resource indicates a bitmap including an uplink bandwidth available resource group sequence number or a resource group sequence number and a resource group number of the sending resource;
  • the time domain resource includes the number of consecutive uplink subframes available to the frequency domain resource.
  • the specific information is as follows.
  • a new formatX format is used as the indication mode, which indicates mode 2, which uses a combination of the start index and the RBG number of the RBG.
  • the new formatX also includes conventional control information, such as modulation information (if there is unified modulation information or high-level signaling, there is no such field), power parameters and other control parameters.
  • modulation information if there is unified modulation information or high-level signaling, there is no such field
  • power parameters if there is unified modulation information or high-level signaling, there is no such field
  • Step 1 The base station notifies the V2X terminal in the coverage by using a system broadcast message, where the system broadcast message includes at least one group of V-RNTIs for blind detection;
  • the base station and the V2X terminal pre-configure at least one set of V-RNTIs in a predefined manner
  • the V2X terminal is notified by the RRC signaling to blindly detect at least one V-RNTI of the PDCCH;
  • the at least one V-RNTI may be determined according to a service level or determined according to a service data packet size or determined by a user group, or randomly selected at least one One V-RNTI in the V-RNTI selects the remaining V-RNTI after the selected V-RNTI is occupied.
  • Step 2 The V2X terminal obtains at least one set of V-RNTIs through system broadcast messages or pre-configured in a predefined manner or through RRC signaling.
  • Step 3 When the V2X terminal is ready to send uplink information, the PDCCH is blindly detected, and the specific search space in the common search space of the PDCCH or the V2X terminal or the dedicated search space of the low-latency service (for example, V2X triggered service) adopts format0.
  • the format 4 or the format X and the corresponding V-RNTI retrieve the available uplink scheduling information. If the CRC check succeeds, the V2X terminal knows that the information is required by itself, and further decodes the uplink scheduling information to obtain the uplink resource.
  • the V2X terminal may select the starting resource according to the indicated uplink resource size and the buffer state according to the predefined resource block in the indicated resource. For example, the resources specified by the low-latency service are further divided according to the sub-frame time domain and the post-frequency domain. Each resource is a predefined size or is known by the V-RNTI. The V2X terminal selects one of the resources as the uplink resource according to the random selection principle. Send information.
  • the pre-configured resource block is 190 RBs, and one subframe 16 PRB can be occupied.
  • the RNTI adopts V-RNTI1, and the resource configured by the PDCCH is one subframe 32 PRB, and the V2X terminal can select the upper half of the frequency domain resource of the resource block. Sending, or selecting the lower half of the frequency domain resource of its resource block for transmission;
  • the resource block of the pre-configured V-RNTI1 is 190B
  • the resource block of the V-RNTI is 300 RB
  • the V2X terminal selects an RNTI blind decoding to obtain the corresponding uplink resource according to the buffer status of the V2.
  • the multiple PDCCHs indicate multiple available uplink resources for low-latency services, and each PDCCH indicates one uplink resource for low-latency services; wherein the multiple PDCCHs may use the same V-RNTI, or Different V-RNTIs are used; different V-RNTIs can determine the correspondence according to the service level, or determine the correspondence according to the service packet size, or determine the correspondence according to the user group.
  • Step 4 The V2X terminal sends information on the selected uplink resource.
  • Step 5 The base station checks whether there is a V2X terminal-related low-latency service on the known uplink resource. If there is a V2X terminal-related low-latency service, the corresponding information is decoded according to the configured resource rule, and the packet is unicast after the packet is unicast. , multicast or broadcast to the desired user group.
  • the embodiment of the invention further provides a resource configuration method.
  • the V2X terminal performs information transmission based on the uplink resources pre-configured by the base station and based on the PC5 link (ie, the vehicle-to-vehicle link).
  • the base station sends the pre-configured related information, and the pre-configured related information may be sent by the PDCCH to the V2X terminal in the coverage area by using the broadcast message, or may be sent to the V2X through the RRC signaling when the V2X link is established by the base station and the V2X terminal. Terminal; or pre-configured in a predefined manner. Then the V2X terminal receives the pre-configured related information.
  • the pre-configured related information includes a V-RNTI for descrambling the uplink scheduling information by the V2X terminal, and the number of the V-RNTIs may be at least one group.
  • the V2X terminal is in the coverage of the base station, and the pre-configured uplink resource of the receiving base station is used to send information to other Vehicle users on the uplink PC5 link resource, which can be used for event-triggered emergency services, and can be applied for resources without using the base station.
  • the base station may carry, by using the PDCCH, uplink scheduling information that includes an uplink resource allocated by the base station for the low-latency service;
  • the uplink scheduling information may be carried by the PDCCH, and the carried information is DCI, and is used to indicate uplink scheduling allocation information that can be used by the V2X terminal.
  • the base station sends the uplink scheduling information to a V2X terminal.
  • the uplink scheduling information may be located in a common search space of the PDCCH, or a specific search space of the terminal, or a dedicated search space of the low-latency service.
  • the format used to indicate communication through the PC5 transmission interface is format 5, or a new transmission format, such as format X.
  • the specific implementation process includes:
  • the base station and the V2X terminal pre-configure at least one set of V-RNTIs in a predefined manner
  • the V2X terminal is notified by the RRC signaling to blindly detect at least one V-RNTI of the PDCCH;
  • the at least one V-RNTI may be determined according to a service level or determined according to a service data packet size or determined by a user group, or randomly selected one V-RNTI in the at least one V-RNTI. After the selected V-RNTI is occupied, the remaining V-RNTIs are selected.
  • Step 2 The V2X terminal obtains at least one set of V-RNTIs through system broadcast messages or pre-configured in a predefined manner or through RRC signaling.
  • Step 3 When the V2X terminal is ready to send uplink information, check the PDCCH, and search for the dedicated search space in the common search space of the PDCCH or the specific search space of the V2X terminal, or the low-latency service (for example, V2X triggered service). Uplink scheduling information; the V2X terminal decodes the uplink scheduling information by using the V-RNTI to obtain an uplink resource.
  • the uplink scheduling information may be in an existing format5 format. If obtained The V-RNTI is a common V-RNTI, indicating that the uplink resource included in the corresponding uplink scheduling information can be used by at least one V2X terminal. The V2X terminal may select the starting resource according to the indicated uplink resource size and the buffer state according to the predefined resource block in the indicated resource;
  • the multiple PDCCHs indicate multiple available uplink resources for low-latency services, and each PDCCH indicates one uplink resource for low-latency services; wherein the multiple PDCCHs may use the same V-RNTI, Different V-RNTIs may also be used; different V-RNTIs may determine correspondences according to service levels, or determine correspondences according to service data packet sizes, or determine correspondences according to user groups.
  • the new format format X can be specifically referred to in the third embodiment, and details are not described herein again.
  • the embodiment of the invention further provides a resource configuration method.
  • the V2X terminal is based on the uplink resource pre-configured by the base station, where the pre-configured uplink resource and the scheduling mode are known to the V2X terminal; and the uplink scheduled resource location is transmitted according to the modulation and coding mode configured by the base station.
  • the specific implementation process includes:
  • Step 1 The base station notifies the V2X terminal in the coverage by using a system broadcast message, where the system broadcast message is carried by a system information block (SIB), and the message includes uplink resource scheduling information.
  • SIB system information block
  • the base station and the V2X terminal obtain the uplink resource scheduling information configured by the base station for the low-latency service by using the S-RNTI descrambling common to the cell;
  • Step 3 When the V2X is ready to send uplink information, the uplink resource scheduling information configured in a predefined manner is used for information transmission; the transmitted information is scrambled by the V-RNTI.
  • Step 4 The base station checks whether there is a low delay associated with the V2X terminal on the known uplink resource.
  • the service if there is a low-latency service related to the V2X terminal, decodes the corresponding information according to the configured resource rule, and sends the packet to the required user group through unicast, multicast, or broadcast.
  • FIG. 5 is a schematic structural diagram of a network side device according to an embodiment of the present invention; as shown in FIG. 5, the network side device includes: an allocation module 51 and a sending module 52;
  • the sending module 52 is configured to send uplink scheduling information generated by the allocating module 51.
  • the network side device includes at least one of the following: an evolved base station (eNB), a relay station (RN), a cell coordination entity (MCE), a gateway (GW), and a mobility management device (MME).
  • eNB evolved base station
  • RN relay station
  • MCE cell coordination entity
  • GW gateway
  • MME mobility management device
  • an eNB is used as a network side device as an example for describing an evolved universal terrestrial radio access network (EUTRAN) operation management and maintenance (OAM) manager.
  • EUTRAN evolved universal terrestrial radio access network
  • OAM operation management and maintenance
  • the allocating module 51 is configured to: after allocating the uplink resource of the normal service, allocate the remaining uplink resource to the low-latency service, and generate at least one uplink scheduling information based on the allocated uplink resource; or, in the allocation When the uplink resource is allocated, the reserved uplink resource is allocated to the low-latency service, and the at least one uplink scheduling information is generated based on the allocated uplink resource; or the fixed uplink resource is pre-configured to be allocated to the low-latency service, based on the allocated uplink.
  • the resource generates at least one uplink scheduling information.
  • the fixed uplink resource generates at least one uplink scheduling information to be sent by using a broadcast message; or, the uplink scheduling information of the fixed uplink resource is pre-configured in a predefined manner.
  • the sending module 52 is configured to send the uplink scheduling information by using a PDCCH, where the uplink scheduling information is sent in a preset format, and is scrambled based on the preset identifier.
  • the preset format includes: format0, format4, or format X.
  • the format X is a new format in the embodiment of the present invention; the format X includes at least a frequency domain resource indication and a time domain resource indication; the frequency domain resource indication includes a bitmap of an uplink bandwidth available resource group sequence number or a resource group of a transmission resource. The sequence number and the number of resource groups; the time domain resource includes the number of consecutive uplink subframes available to the frequency domain resource.
  • Mode 1 is that each group can contain the same number of PRBs, that is, each set contains the same P.
  • the total number of resource blocks of the uplink system bandwidth is 25, and the resource blocks allocated to the UE are PRB2 and PRB. 3.
  • Mode 2 may also define that each resource group includes a different PRB, as shown in FIG. 6(b), the indication mode is a bitmap of the set index index, and the resource blocks allocated to the UE are PRB 2, PRB 3, and PRB4, and the corresponding bitmap indication is 010000. . This reduces resource indication overhead, but requires notification of the type of its resource group by broadcast or by predefined means.
  • the new formatX can indicate contiguous subframe resources.
  • the existing format0 and format4 have their fixed time mode in the time domain subframe, so there is no overhead of the time domain subframe, such as the FDD mode UE.
  • the sub-frame n receives the PDCCH, and transmits the PUSCH on the corresponding resource of the subframe n+4, and the TDD transmits the PUSCH on the corresponding resource of the subframe n+k when the subframe receives the PDCCH, and the k protocol is defined according to different configurations.
  • FormatX can be used for multiple data packet transmission or retransmission of low-latency services, that is, design parameter L, that is, if there is a parameter L, it means that for FDD, receiving PDCCH in subframe n is at n+4 and subsequent L-1.
  • the uplink resources of the subframes can be used for the transmission or retransmission of low-latency services.
  • a new formatX format is used for the resource indication mode 3, and a combination indication manner of the RBG start index and the RBG number is adopted.
  • the total number of resource blocks indicating the uplink system bandwidth is 25, and the resource blocks allocated to the UE are PRB 2, PRB 3, PRB 12, PRB 13, and PRB 24.
  • the uplink scheduling information may be carried by the PDCCH, and the information carried by the PDCCH is the uplink DCI, and the uplink scheduling information is used by the DCI format format 0, format 4, and the format 5 for the D2D communication.
  • the format X format is sent.
  • the preset identifier is at least one set of wireless network temporary identifiers for the low latency service.
  • the wireless network temporary identifier may specifically be a wireless network temporary identifier (V-RNTI) for the low delay service.
  • the V-RNTI can be pre-configured in a predefined manner, or sent to the terminal through a broadcast message, or through the RRC when the terminal establishes a V2X link with the network side device.
  • the signaling module may be configured to: the sending module 52 is further configured to send the preset identifier by using a broadcast message before sending the uplink scheduling information; or send the preset identifier by using RRC signaling; or
  • the allocating module 51 is configured to pre-configure the preset identifier in a predefined manner.
  • the low-latency service may be an event-triggered service, such as a V2X event-triggered service.
  • the allocation module 51 in the network side device may be implemented by a central processing unit (CPU, Central Processing Unit) and a digital signal processor (DSP, Digital Signal Processor) in the network side device. Or a Field-Programmable Gate Array (FPGA) implementation; the transmitting module 52 in the network side device may be implemented by a transmitting antenna or a transmitter in the network side device in an actual application.
  • CPU Central Processing Unit
  • DSP Digital Signal Processor
  • FPGA Field-Programmable Gate Array
  • FIG. 6 is a schematic structural diagram of a terminal according to an embodiment of the present invention; as shown in FIG. 6, the terminal includes: an obtaining unit 61, a processing unit 62, and a sending unit 63;
  • the obtaining unit 61 is configured to: after receiving the trigger indication of the low-delay service, search and obtain uplink scheduling information;
  • the processing unit 62 is configured to determine uplink scheduling allocation information based on the uplink scheduling information obtained by the obtaining unit 61;
  • the sending unit 63 is configured to send information according to the uplink scheduling allocation information determined by the processing unit 62.
  • the obtaining unit 61 is configured to search for a common search space of the PDCCH, or a specific search space of the terminal, or a dedicated search space of the low-latency service to obtain uplink scheduling information.
  • the obtaining unit 61 is further configured to obtain a preset identifier by using a broadcast message before obtaining the uplink scheduling information, or obtain a preset identifier by using RRC signaling;
  • the processing unit 62 is configured to descramble the uplink scheduling information based on the preset identifier obtained by the obtaining unit 61, to obtain an uplink resource of the low-latency service, or configured as a pre-configured preset identifier.
  • the uplink scheduling information is descrambled to obtain uplink scheduling allocation information of the low-latency service.
  • the preset identifier is at least one set of wireless network temporary identifiers for the low latency service.
  • the wireless network temporary identifier may specifically be a wireless network temporary identifier (V-RNTI) for the low delay service.
  • V-RNTI can be obtained by pre-configuration in a predefined manner, or obtained by using a broadcast message, or by using an RRC letter when the terminal establishes a V2X link with the network side device. Get it.
  • the terminal After obtaining the V-RNTI, the terminal searches for the PDCCH after receiving the trigger indication of the low-latency service, and searches for a dedicated search space in the common search space, or the specific search space of the terminal, or the low-latency service.
  • Upstream scheduling information After obtaining the uplink scheduling information, the V-RNTI performs decoding to obtain uplink scheduling allocation information to perform information transmission.
  • the sending unit 63 may allocate information according to the uplink scheduling through a Uu interface.
  • the network side device for example, an eNB
  • the functions of the processing units in the terminal of the embodiment of the present invention may be understood by referring to the related description of the foregoing resource configuration method, and the processing units in the terminal in the embodiment of the present invention may implement the embodiments of the present invention.
  • the function of the analog circuit is implemented, and can also be implemented by running the software of the function described in the embodiment of the present invention on the smart terminal.
  • the obtaining unit 61 and the processing unit 62 in the terminal may be implemented by a CPU, a DSP or an FPGA in the terminal in an actual application; the sending unit 63 in the terminal may be used in an actual application.
  • the transmit antenna or transmitter in the terminal is implemented.
  • embodiments of the present invention can be provided as a method, system, or computer program product. Accordingly, the present invention can take the form of a hardware embodiment, a software embodiment, or a combination of software and hardware. Moreover, the invention can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage and optical storage, etc.) including computer usable program code.
  • the computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device.
  • the device is implemented in a flow chart A function specified in a block or blocks of a process or multiple processes and/or block diagrams.
  • These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device.
  • the instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.
  • the technical solution of the embodiment of the present invention allocates uplink resources for low-latency services (for example, triggering services) in a pre-configured or reserved manner, and can be directly used when the uplink has low-latency service communication requirements, thereby reducing uplink resources.
  • the request process shortens the request time of the uplink resource, reduces the control signaling overhead of the related uplink resource application and the network side device interaction, and satisfies the low delay requirement of the V2X communication.

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

Abstract

Conformément à des modes de réalisation, la présente invention concerne un procédé d'attribution de ressource, un dispositif côté réseau, un terminal et un support de stockage informatique. Le procédé comprend les opérations suivantes : un dispositif côté réseau attribue une ressource de liaison montante d'un service à faible latence au moyen d'une configuration ou d'une réservation ; et le dispositif côté réseau génère des informations de planification de liaison montante sur la base de la ressource de liaison montante attribuée, et transmet les informations de planification de liaison montante.
PCT/CN2016/109718 2016-01-29 2016-12-13 Procédé d'attribution de ressource, dispositif côté réseau, terminal et support de stockage informatique WO2017128878A1 (fr)

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