WO2017036328A1 - Procédé et dispositif d'émission/réception d'informations de configuration de service à faible latence - Google Patents

Procédé et dispositif d'émission/réception d'informations de configuration de service à faible latence Download PDF

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Publication number
WO2017036328A1
WO2017036328A1 PCT/CN2016/096563 CN2016096563W WO2017036328A1 WO 2017036328 A1 WO2017036328 A1 WO 2017036328A1 CN 2016096563 W CN2016096563 W CN 2016096563W WO 2017036328 A1 WO2017036328 A1 WO 2017036328A1
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low
subframe
latency service
mbsfn subframe
service
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PCT/CN2016/096563
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English (en)
Chinese (zh)
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苟伟
夏树强
戴谦
石靖
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中兴通讯股份有限公司
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Publication of WO2017036328A1 publication Critical patent/WO2017036328A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/06—Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/30—Resource management for broadcast services

Definitions

  • This document relates to, but is not limited to, the field of communications, and in particular, to a method and apparatus for transmitting and receiving configuration information of a low latency service.
  • the Multimedia Broadcast Multicast Network (MBSFN) subframe is a type of subframe supported by the Long Term Evolution (LTE) related standard.
  • the subframe is used as the MBMS service.
  • the user equipment (User Equipment, UE) configured with the specific transmission mode may use the MBSFN subframe to perform the transmission of the unicast Unicast service.
  • the base station does not send the cell-specific reference signals (CRS) in the non-physical downlink control channel (PDCCH) field of the MBSFN subframe, and the UE of the Unicast service is not in the non-PDCCH region of the MBSFN subframe.
  • the receiving CRS is used for measurement.
  • the UE of the Multimedia Broadcast Multicast Service (MBMS) receives the MBMS service according to the control information of the MBMS.
  • a low-latency service In the evolution of the LTE standard, it is currently proposed to further reduce the delay time of user plane data arrival to support the more demanding business requirements for delay requirements.
  • a service that is more demanding for delay is called a low-latency service.
  • Embodiments of the present invention provide a method and apparatus for transmitting and receiving configuration information of a low-latency service, which can manage a subframe for transmitting a low-latency service, and implement a low-latency service and a legacy legacy industry.
  • a method for transmitting configuration information of a low latency service includes:
  • the configuration information includes: a site configuration multimedia broadcast multicast service, a single frequency network, an MBSFN subframe, a low-latency service transmission, and/or a non-MBSFN subframe, configured for low-latency service transmission, where The MBSFN subframe or the non-MBSFN subframe of the delay service uses a short transmission time interval TTI for data transmission.
  • the method further includes:
  • the station configures a physical resource block PRB resource used by the low-latency service in the MBSFN subframe and/or the non-MBSFN subframe.
  • the PRB resource used by the low-latency service is notified by the downlink control information DCI; or the PRB resource used by the low-latency service is notified by using a broadcast-type radio resource control RRC message or a dedicated RRC message.
  • the site When the site configures the MBSFN subframe for the low-latency service transmission, the site uses all the resources as the resources of the low-latency service; when the site configures the non-MBSFN subframe for the low-latency service transmission, the site configures the low delay.
  • the configuration information of the low-latency service subframe includes at least one of the following parameters: a period parameter, a start position parameter, and a bitmap parameter; wherein:
  • the period parameter is used to describe the duration of the low-latency service subframe, in units of subframes
  • the starting position parameter is used to describe a starting position of a period, relative to a first subframe of a frame with a frame number of 0;
  • the bitmap parameter is used to describe a subframe for a low delay in a period.
  • the structure in the MBSFN subframe includes:
  • the orthogonal frequency division multiplexing OFDM symbol 7 and the OFDM symbol 8 in the MBSFN subframe are as described a control domain of the low latency service, the OFDM symbol 9 to the OFDM symbol 13 being a data domain of the low latency service; or
  • Orthogonal Frequency Division Multiplexing (OFDM) symbol 7 in the MBSFN subframe is a control domain of the low-latency service, and the OFDM symbol 8 to OFDM symbol 13 are data fields of the low-latency service;
  • OFDM Orthogonal Frequency Division Multiplexing
  • the control domain of the low-latency service includes a physical hybrid automatic repeat indication channel SPCFICH information of a low-latency service and/or a physical control format indication channel SPHICH information of a low-latency service.
  • the cell-specific reference signal CRS is transmitted in the last 13 or 12 OFDM symbols in the MBSFN subframe.
  • the structure in the MBSFN subframe includes:
  • the physical downlink control channel SPDCCH information of the low latency service is located in the OFDM symbol in which the CRS is located.
  • the OFDM symbol corresponding to the SPDCCH information is one or two.
  • the total number of OFDM symbols corresponding to the SPDCCH information in the i-th MBSFN subframe is equal to the total number of OFDM symbols corresponding to the SPDCCH information in the i+1th MBSFN subframe, where i is a positive integer.
  • the TTIs of different durations multiplex the frequency domain resources in a frequency division manner, wherein the PDCCH domain corresponding to the first one or two OFDM symbols in the MBSFN subframe can schedule resources in any frequency domain.
  • the remaining TTIs in different frequency domains cannot perform SPDCCH cross-frequency domain scheduling.
  • a method for receiving configuration information of a low latency service includes:
  • the user equipment receives the configuration information of the low-latency service subframe, and receives the data of the low-latency service according to the configuration information of the low-latency service subframe.
  • the receiving according to the configuration information of the low-latency service subframe, the data of the low-latency service, including:
  • the user equipment determines that the MBSFN subframe is a low-latency service subframe, and receives control information of data and/or low-latency service from the MBSFN subframe; wherein, when the user equipment is not configured as When the MBSFN subframe receives the legacy unicast service mode, the user equipment determines that the MBSFN subframe is a low-latency service subframe;
  • the received subframe is an MBSFN subframe
  • the PDCCH information of the MBSFN subframe includes the DCI of the user equipment, and the user equipment is configured to be in a device that receives data in an MBSFN subframe
  • the user The device determines that the MBSFN subframe is a low-latency service subframe, and receives control information of data and/or low-latency service from the MBSFN subframe;
  • the received subframe is an MBSFN subframe
  • the PDCCH information of the MBSFN subframe includes the DCI of the user equipment, and the DCI is used to schedule a low-latency service
  • the user equipment determines the MBSFN subframe. Controlling information for receiving data and/or low latency traffic from the MBSFN subframe for a low latency service subframe;
  • the received subframe is a non-MBSFN subframe
  • the PDCCH information of the MBSFN subframe includes the DCI of the user equipment
  • the UE determines, by using signaling, that the non-MBSFN subframe is a low-latency service subframe.
  • the user equipment receives control information of the data and/or the low latency service from the non-MBSFN subframe.
  • An apparatus for transmitting configuration information of a low latency service includes:
  • the first configuration module is configured to configure a low latency service subframe
  • a sending module configured to send configuration information of the low latency service subframe
  • the configuration information includes: a site configuration multimedia broadcast multicast service, a single frequency network, an MBSFN subframe, a low-latency service transmission, and/or a non-MBSFN subframe, configured for low-latency service transmission, where The MBSFN subframe or the non-MBSFN subframe of the delay service uses a short transmission time interval TTI for data transmission.
  • the device further includes:
  • the second configuration module is configured to configure a physical resource block PRB resource used by the low-latency service in the MBSFN subframe and/or the non-MBSFN subframe after configuring the subframe of the low-latency service.
  • the PRB resource used by the low-latency service is notified by the downlink control information DCI; or the PRB resource used by the low-latency service is controlled by using a broadcast-type radio resource. RRC message or dedicated RRC message notification.
  • the first configuration module is configured to use all resources as low-latency service resources when configuring MBSFN subframes for low-latency service transmission; and configure non-MBSFN subframes for low-latency service transmission. Configure the intra-subframe resources occupied by the low-latency service and broadcast the information of the sub-frames configured with the low-latency service.
  • the configuration information of the low-latency service subframe includes at least one of the following parameters: a period parameter, a start position parameter, and a bitmap parameter; wherein:
  • the period parameter is used to describe the duration of the low-latency service subframe, in units of subframes
  • the starting position parameter is used to describe a starting position of a period, relative to a first subframe of a frame with a frame number of 0;
  • the bitmap parameter is used to describe a subframe for a low delay in a period.
  • the structure in the MBSFN subframe includes:
  • the orthogonal frequency division multiplexing OFDM symbol 7 and the OFDM symbol 8 in the MBSFN subframe are control domains of the low latency service, and the OFDM symbols 9 to OFDM symbols 13 are data domains of the low latency service; or,
  • Orthogonal Frequency Division Multiplexing (OFDM) symbol 7 in the MBSFN subframe is a control domain of the low-latency service, and the OFDM symbol 8 to OFDM symbol 13 are data fields of the low-latency service;
  • OFDM Orthogonal Frequency Division Multiplexing
  • the control domain of the low-latency service includes a physical hybrid automatic repeat indication channel SPCFICH information of a low-latency service and/or a physical control format indication channel SPHICH information of a low-latency service.
  • the cell-specific reference signal CRS is transmitted in the last 13 or 12 OFDM symbols in the MBSFN subframe.
  • the structure in the MBSFN subframe includes:
  • the physical downlink control channel SPDCCH information of the low latency service is located in the OFDM symbol in which the CRS is located.
  • the OFDM symbol corresponding to the SPDCCH information is one or two.
  • the total number of OFDM symbols corresponding to the SPDCCH information in the i-th MBSFN subframe is equal to the total number of OFDM symbols corresponding to the SPDCCH information in the i+1th MBSFN subframe, where i is a positive integer.
  • the TTIs of different durations multiplex the frequency domain resources in a frequency division manner, wherein the PDCCH domain corresponding to the first one or two OFDM symbols in the MBSFN subframe can schedule resources in any frequency domain.
  • the remaining TTIs in different frequency domains cannot perform SPDCCH cross-frequency domain scheduling.
  • An apparatus for receiving configuration information of a low latency service includes:
  • a receiving module configured to receive configuration information of a low latency service subframe
  • the processing module is configured to receive data of the low latency service according to the configuration information of the low latency service subframe.
  • processing module is set to:
  • the user equipment determines The MBSFN subframe is a low-latency service subframe, and receives control information of data and/or low-latency service from the MBSFN subframe; wherein, when the user equipment is not configured to receive a legacy list in the MBSFN subframe When the service mode is broadcast, the user equipment determines that the MBSFN subframe is a low-latency service subframe.
  • the received subframe is an MBSFN subframe
  • the PDCCH information of the MBSFN subframe includes the DCI of the user equipment, and the user equipment is configured to be in a device that receives data in an MBSFN subframe
  • the user The device determines that the MBSFN subframe is a low-latency service subframe, and receives control information of data and/or low-latency service from the MBSFN subframe;
  • the received subframe is an MBSFN subframe
  • the PDCCH information of the MBSFN subframe includes the DCI of the user equipment, and the DCI is used to schedule a low-latency service
  • the user equipment determines the MBSFN subframe. Controlling information for receiving data and/or low latency traffic from the MBSFN subframe for a low latency service subframe;
  • the received subframe is a non-MBSFN subframe
  • the PDCCH signal of the MBSFN subframe if the PDCCH signal of the MBSFN subframe.
  • the DCI of the user equipment is included in the information, and when the UE determines that the non-MBSFN subframe is a low-latency service subframe by using signaling, the user equipment receives data and/or low-latency service from the non-MBSFN subframe. Control information.
  • the embodiment of the present invention can manage a subframe for transmitting a low-latency service, and the low-latency service and the legacy service coexist in the same carrier, and the low-latency service hardly affects the sending and receiving of the legacy service. Has good backward compatibility.
  • FIG. 1 is a flowchart of a method for sending configuration information of a low latency service according to an embodiment of the present invention
  • FIG. 2 is a flowchart of a method for receiving configuration information of a low latency service according to an embodiment of the present invention
  • FIG. 3 is a schematic structural diagram of an MBSFN subframe according to Embodiment 1 of the present invention.
  • FIG. 4 is a second structural diagram of an MBSFN subframe according to Embodiment 1 of the present invention.
  • FIG. 5 is a third structural diagram of an MBSFN subframe according to Embodiment 1 of the present invention.
  • FIG. 6 is a schematic diagram 1 of an MBSFN subframe supported by a second embodiment of the present invention for supporting multiple short TTI low-latency service time-frequency division multiplexing;
  • FIG. 7 is a schematic diagram 2 of an MBSFN subframe supported by a second embodiment of the present invention supporting multiple different short TTI frequency division multiplexing;
  • FIG. 8 is a schematic diagram 3 of an MBSFN subframe supported by a second embodiment of the present invention for supporting low latency TTI multiplexing of different durations;
  • FIG. 9 is a structural diagram of an apparatus for transmitting configuration information of a low latency service according to an embodiment of the present invention.
  • FIG. 10 is a structural diagram of an apparatus for receiving configuration information of a low latency service according to an embodiment of the present invention.
  • FIG. 1 is a flowchart of a method for transmitting configuration information of a low latency service according to an embodiment of the present invention.
  • the method shown in Figure 1 includes:
  • Step 101 The station configures a low-latency service subframe.
  • Step 102 The station sends configuration information of the low latency service subframe.
  • the configuration information includes: a site configuration multimedia broadcast multicast service, a single frequency network, an MBSFN subframe, a low-latency service transmission, and/or a non-MBSFN subframe, configured for low-latency service transmission, where The MBSFN subframe or the non-MBSFN subframe of the delay service uses a short transmission time interval TTI for data transmission.
  • the embodiment of the present invention provides that the low-latency service and the legacy service coexist in the same carrier by configuring the low-latency service sub-frame, and the low-latency service does not affect the transmission of the legacy service. And receiving, with good backward compatibility.
  • the site configures a low-latency service sub-frame and sends the configured low-latency service sub-frame configuration information to be sent.
  • the station (for example, a macro base station, a small base station, etc.) configures an MBSFN subframe for low-latency service transmission.
  • the MBSFN subframe for transmitting the low-latency service uses a short Transmission Time Interval (TTI) for data transmission.
  • TTI Transmission Time Interval
  • non-MBSFN subframes for low latency traffic transmission.
  • the site configures the low-latency service subframe
  • the site configures the physical resource block PRB resource used by the low-latency service in the MBSFN subframe and/or the non-MBSFN subframe.
  • the PRB resource used by the low-latency service is notified by the downlink control information DCI; or the PRB resource used by the low-latency service is notified by using a broadcast-type radio resource control RRC message or a dedicated RRC message.
  • the unused field of the existing message is used to transmit the PRB resource used by the low-latency service, and the related communication mechanism is not required to be changed, and the implementation is simple.
  • the site When the site configures MBSFN subframes for low-latency service transmission, the site can use all the resources. The source is transmitted for low latency traffic.
  • the station When a site configures a non-MBSFN sub-frame for low-latency service transmission, the station needs to further configure the intra-subframe resources occupied by the low-latency service.
  • the impact on the legacy UE can be minimized.
  • the legacy UE does not support the MBMS service or does not support the MBMS function
  • the PMCH field in the MBSFN subframe is not received and is not used for measurement. This is because the standard specifies that the CRS signal is not transmitted in the PMCH field of the MBSFN subframe.
  • the UE determines to receive the PMCH domain in those MBSFN subframes by receiving the multicast control channel MCCH signaling. Obviously, these subframes are not used for low-latency services, so there is no for legacy UEs. Affected.
  • the station can configure the MBSFN subframe and/or the non-MBSFN subframe for the low-latency service transmission
  • the resources of the two types of subframes of the MBSFN subframe and the non-MBSFN subframe are as follows:
  • the site uses all resources as resources for low-latency services;
  • the site configures the intra-subframe resources occupied by the low-latency service and broadcasts the information of the subframe configured with the low-latency service.
  • the configuration information includes at least one parameter: a periodic parameter, a starting location parameter, and a bitmap parameter; wherein:
  • the period parameter is used to describe the duration of the low-latency service subframe, in units of subframes
  • the starting position parameter is used to describe a starting position of a period, relative to a first subframe of a frame with a frame number of 0;
  • the bitmap parameter is used to describe a subframe for a low delay in a period.
  • the structure in the MBSFN subframe includes:
  • the orthogonal frequency division multiplexing OFDM symbol 7 and the OFDM symbol 8 in the MBSFN subframe are control domains of the low latency service, and the OFDM symbols 9 to OFDM symbols 13 are data domains of the low latency service; or,
  • Orthogonal Frequency Division Multiplexing (OFDM) symbol 7 in the MBSFN subframe is a control domain of the low-latency service, and the OFDM symbol 8 to OFDM symbol 13 are data fields of the low-latency service;
  • OFDM Orthogonal Frequency Division Multiplexing
  • the control domain of the low-latency service includes a physical hybrid automatic repeat indication channel SPCFICH information of a low-latency service and/or a physical control format indication channel SPHICH information of a low-latency service.
  • the cell-specific reference signal CRS is transmitted in the last 13 or 12 OFDM symbols in the MBSFN subframe.
  • the structure in the MBSFN subframe includes: the physical downlink control channel SPDCCH information of the low-latency service is located in the OFDM symbol in which the CRS is located.
  • the OFDM symbol corresponding to the SPDCCH information is one or two.
  • the total number of OFDM symbols corresponding to the SPDCCH information in the i-th MBSFN subframe is equal to the total number of OFDM symbols corresponding to the SPDCCH information in the i+1th MBSFN subframe, where i is a positive integer.
  • the TTIs of different durations multiplex the frequency domain resources in a frequency division manner, wherein the PDCCH domain corresponding to the first one or two OFDM symbols in the MBSFN subframe can schedule resources in any frequency domain.
  • the remaining TTIs in different frequency domains cannot perform SPDCCH cross-frequency domain scheduling.
  • FIG. 2 is a flowchart of a method for receiving configuration information of a low latency service according to an embodiment of the present invention.
  • the method shown in Figure 2 includes:
  • Step 201 The user equipment receives configuration information of a low-latency service subframe.
  • Step 202 The user equipment receives data of the low latency service according to the configuration information of the low latency service subframe.
  • the receiving according to the configuration information of the low-latency service subframe, the data of the low-latency service, including:
  • the user equipment determines The MBSFN subframe is a low-latency service subframe, and receives control information of data and/or low-latency service from the MBSFN subframe; wherein, when the user equipment is not configured to receive a legacy list in the MBSFN subframe When the service mode is broadcast, the user equipment determines the The MBSFN subframe is a low latency service subframe;
  • the received subframe is an MBSFN subframe
  • the PDCCH information of the MBSFN subframe includes the DCI of the user equipment, and the user equipment is configured to be in a device that receives data in an MBSFN subframe
  • the user The device determines that the MBSFN subframe is a low-latency service subframe, and receives control information of data and/or low-latency service from the MBSFN subframe;
  • the received subframe is an MBSFN subframe
  • the PDCCH information of the MBSFN subframe includes the DCI of the user equipment, and the DCI is used to schedule a low-latency service
  • the user equipment determines the MBSFN subframe. Controlling information for receiving data and/or low latency traffic from the MBSFN subframe for a low latency service subframe;
  • the received subframe is a non-MBSFN subframe
  • the PDCCH information of the MBSFN subframe includes the DCI of the user equipment
  • the UE determines, by using signaling, that the non-MBSFN subframe is a low-latency service subframe.
  • the user equipment receives control information of the data and/or the low latency service from the non-MBSFN subframe.
  • the embodiment provided by the present invention receives the configuration information of the low-latency service subframe, and performs receiving processing on the data in the subframe by using the configuration information, so that the low-latency service and the legacy service coexist in the same carrier, and the low carrier is low.
  • the delay service hardly affects the sending and receiving of the legacy service, and has good backward compatibility.
  • the station uses MBSFN subframe configuration signaling, configures MBSFN subframes, and uses some or all of the configured MBSFN subframes to schedule transmission of low-latency services.
  • the legacy UE After receiving the MBSFN subframe configuration signaling sent by the station, the legacy UE detects the first one or two OFDM (Orthogonal Frequency Division Multiplexing) of the MBSFN subframe. The symbol determines whether there is authorization information related to itself. If there is no authorization information or only uplink grant information, the legacy UE does not receive or parse the remaining OFDM symbols of the MBSFN subframe. For a legacy UE that has an MBMS service requirement, the OFDM symbol corresponding to the PMCH (Physical Multicast Channel) in the MBSFN subframe is received according to the control signaling corresponding to the MBMS service.
  • PMCH Physical Multicast Channel
  • PHICH Physical Hybrid ARQ Indicator Channel
  • PCFICH Physical Control Format Indicator Channel
  • the behavior of the legacy UE described above can be supported by the related protocol.
  • the legacy UE has corresponding UE behavior for data reception of the MBSFN subframe.
  • the site configures and uses the MBSFN subframe to transmit the low-latency service, does not affect the reception behavior of the legacy UE, and does not affect the measurement of the legacy UE, and can ensure that the service of the low-latency service and the legacy UE coexist in the same carrier.
  • the PMCH domain inside the MBSFN subframe used for the low-latency service can design a new transmission mode, and does not affect the related legacy UE.
  • the MBSFN subframe structure used for transmitting low-latency services includes:
  • the first one or two OFDM symbols in the subframe are used for normal unicast traffic (non-low latency service).
  • the specific subframe is structured as follows:
  • FIG. 3 is a schematic structural diagram of an MBSFN subframe according to Embodiment 1 of the present invention.
  • the TTI of the low-latency service is 0.5 ms (the TTI of the legacy service is 1 ms).
  • the first or the first two OFDM symbols are defined by the relevant protocol.
  • the PDCCH field which is used to schedule the UE with the low-latency service; in addition, in the embodiment of the present invention, the symbol 7 and the symbol 8 of the MBSFN subframe of the low-latency service are also configured (the symbol number in the subframe in the embodiment of the present invention is The start of the symbol 0, for example, the symbol 7, which is the 8th symbol, the same as the new control field of the low-latency service, is denoted as SPDCCH (low-latency service PDCCH), which may occupy the symbol 7 or occupy simultaneously.
  • Symbol 7 and symbol 8; simultaneously corresponding to symbol 7, or simultaneous occupation of symbol 7 and symbol 8, further include SPCFICH (low latency service PCFICH), SPHICH (low latency service PHICH) channel.
  • the number of symbols occupied by the SPDCCH is configurable, and one or two OFDM symbols are optimal.
  • the station can adjust the number of SPDCCH occupation symbols per time according to the number of UEs to be scheduled.
  • the remaining OFDM symbols are used to transmit low latency data.
  • the scheduling unit of low-latency service data is formed according to 5 or 6 OFDM symbols in the time domain, and the frequency domain is still in the scheduling unit according to 12 subcarriers.
  • the CRS is not transmitted in the last 13 or 12 OFDM symbols in the associated MBSFN subframe.
  • the CRS in order to support the measurement and/or demodulation purposes of the low-latency UE, the CRS is allowed to be transmitted in the following 13 or 12 OFDM symbols in the MBSFN subframe.
  • a low-latency UE finds an MBSFN subframe for low-latency traffic, there is a CRS transmission in the subframe, and the CRS can be used for measurement and/or demodulation.
  • the MBSFN subframe does not transmit CRS.
  • the MBSFN subframe is used for low time delay, and the following subframe structure can also be used:
  • FIG. 4 and FIG. 5 are respectively two and three diagrams of an MBSFN subframe structure according to Embodiment 1 of the present invention.
  • the SPDCCH when the MBSFN subframe is configured as a low-latency service, the SPDCCH is always located in the OFDM symbol where the CRS is located, or the SPDCCH always takes the symbol of the CRS as a starting symbol, which can significantly improve the control signaling. Decoding success rate.
  • the SPDCCH symbols may be one or two.
  • the MBSFN subframe structure of the optional low-latency service is as shown in FIG. 5.
  • the PDCCH is configured as two OFDM symbols, and the PDCCH needs to transmit related information of the legacy UE, and also sends relevant control signaling of the low-latency UE.
  • the second SPDCCH in the subframe is also configured as 2 OFDM symbols, so that the OFDM symbols of the data scheduling the low-latency UE in the subframe are always two, thereby simplifying the reception and parsing complexity of the low-
  • FIG. 6 is a schematic diagram 1 of an MBSFN subframe supported by a second embodiment of the present invention for supporting multiple short TTI low-latency service time-frequency division multiplexing. If the MBSFN subframe can support multiple different short TTIs, a possible subframe structure is shown in FIG. 6.
  • the TTI of the low-latency service is 7 OFDM symbol duration (0.5 ms) and 2 OFDM symbol durations, respectively.
  • the TTI of the low latency service described above is multiplexed in MBSFN subframes for low latency services.
  • TTIs of different durations are multiplexed in a frequency division manner, and corresponding frequency domain resources are configured for different TTIs, and each TTI is mapped in the corresponding frequency domain resource.
  • the related PDCCH domain can schedule resources in any frequency domain, that is, the duration of 7 OFDM symbols can be scheduled, and the duration of 2 OFDM symbols can be scheduled.
  • the remaining SPDCCHs in the different frequency domains have corresponding SPDCCHs, and the SPDCCH is not allowed to be scheduled across frequency domains.
  • FIG. 7 is a schematic diagram 2 of an MBSFN subframe supported by the second embodiment of the present invention supporting multiple different short TTI frequency division multiplexing.
  • the short TTIs are 7 OFDM symbol durations (0.5 ms), 3 OFDM symbol durations, and 4 TTIs.
  • the short TTIs are multiplexed in MBSFN subframes for low latency services, see FIG. 5.
  • TTIs of different durations may also be multiplexed in the same frequency band.
  • the related processing not mentioned is similar to FIG. 4.
  • FIG. 8 is a schematic diagram 3 of an MBSFN subframe supported by a second embodiment of the present invention for supporting low latency TTI multiplexing of different durations.
  • the MBSFN subframe for low delay internally includes a TTI of 7 OFDM symbol durations, a TTI of 4 OFDM symbol durations, and a TTI of 3 OFDM symbol durations.
  • the first 7 OFDM symbols of the MBSFN subframe are used for TTIs that are all used for 7 OFDM symbol durations, and the latter 7 OFDM symbols are further frequency-divided into TTIs of 7 OFDM symbols, TTIs of 4 OFDM symbols, and 3 OFDM symbols.
  • TTI The associated PDCCH schedules the TTI of the first 7 OFDM symbols.
  • the site When the site configures the MBSFN subframe for the low-latency service, the site is configured in the FDD (Frequency Division Duplex) mode.
  • FDD Frequency Division Duplex
  • One or more of the subframes 0, 4, 5, and 9 are low-frequency transmission.
  • the delay service and the legacy service, or one or more of the subframes 0, 1, 5, and 6 in the TDDD (Time Division Duplexing) mode transmit the low-latency service and the legacy service in a frequency division manner.
  • the station needs to form corresponding configuration signaling to configure the corresponding subframe for the low-latency service, and the signaling is broadcasted in the system. Sent in a broadcast message.
  • the station configures one or more of the subframes 0, 1, 5, 9 or TDD mode in the FDD mode as one of the low-latency service subframes, the station is in such a low-latency service sub-frame.
  • a full bandwidth CRS is sent in the frame.
  • the low-latency service is not transmitted in a PRB (Physical Resource Block) that transmits a PSS/SSS (Primary Synchronization Signal)/Secondary Synchronization Signal (Subsynchronization Signal) in the subframes 0 and 5.
  • the low-latency service is not transmitted in the PRBs in which the PSS or SSS is transmitted in the subframes 0, 1, 5, and 6 in the TDD.
  • the legacy service has a higher priority scheduling, for example, the station can schedule the legacy service in a frequency band pre-allocated to the low-latency service.
  • site configures the low-latency service sub-frame signaling, and further configures the PRB resource used by the low-latency service in the corresponding sub-frame.
  • site can To use the following:
  • a periodic parameter, a start position parameter, and a bitmap bitmap are used in the period to indicate a subframe for low delay. among them:
  • the period parameter describes the duration of the low-latency service subframe, in units of subframes
  • the starting position parameter describes the starting position of the period relative to the first subframe of the frame with frame number 0;
  • Bitmap parameter which describes the sub-frame for low latency within the period.
  • the period parameter is 10
  • the starting position parameter is 3
  • the bit of the bitmap is 10 bits (same as the period parameter).
  • the subframe determined under the above parameters is specifically as follows: the third subframe in the frame with frame number 0 starts, and every 10 subframes is one cycle, and the subframe used for low delay in the period is described by the bitmap parameter.
  • the low-latency resource in the sub-frame can be notified by DCI (Downlink Control Information).
  • DCI Downlink Control Information
  • the first type in the first low-latency subframe in each period, uses DCI to notify all low-latency sub-frames in the period for low-latency services, and all low-latency sub-frames in the period are low.
  • the delay resources are the same;
  • the DCI of the common search space is used for notification; for example, DCI is used to notify low-latency service resources in the subframe in each low-latency subframe.
  • the MBSFN subframe configuration signaling sent by the station is received, and the MBSFN subframe position is determined.
  • the low-latency service UE detects the PDCCH of the MBSFN subframe, and after detecting the downlink DCI signaling, and does not configure the mode of the legacy service of the MBSFN subframe transmission (by detecting whether it is configured to receive the unicast service in the MBSFN subframe) Data), low latency UE determines the MBSFN sub A frame is a low-latency service subframe in which its own data exists; or,
  • the low-latency service UE detects the PDCCH of the MBSFN subframe, and after discovering its own downlink DCI signaling, and the low-latency UE is not configured to receive data in the MBSFN subframe, the UE determines that the MBSFN subframe is low. Delay the business sub-frame, which has its own data; or,
  • the low-latency service UE detects the PDCCH of the MBSFN subframe, and after discovering its own downlink-specific DCI signaling (the specific DCI signaling is used to schedule the low-latency service), the UE determines that the MBSFN subframe is a low-latency service subframe. , which has its own data.
  • the UE When the low latency UE determines that the subframe is a low latency service subframe, the UE needs to perform corresponding control signaling reception and data reception according to the agreed or notified low latency subframe structure.
  • the DCI has multiple formats, and the format used in the downlink scheduling is identifiable. Therefore, the method provided by the embodiment of the present invention has good compatibility.
  • the low latency subframe design described above is based on MBSFN subframes, but can also be used in non-MBSFN subframes.
  • FIG. 9 is a structural diagram of an apparatus for transmitting configuration information of a low latency service according to an embodiment of the present invention.
  • the device shown in Figure 9 includes:
  • the first configuration module 901 is configured to configure a low-latency service subframe.
  • the sending module 902 is configured to send configuration information of the low latency service subframe.
  • the configuration information includes: a site configuration multimedia broadcast multicast service, a single frequency network, an MBSFN subframe, a low-latency service transmission, and/or a non-MBSFN subframe, configured for low-latency service transmission, where The MBSFN subframe or the non-MBSFN subframe of the delay service uses a short transmission time interval TTI for data transmission.
  • the device further comprises:
  • the second configuration module is configured to configure a physical resource block PRB resource used by the low-latency service in the MBSFN subframe and/or the non-MBSFN subframe after configuring the subframe of the low-latency service.
  • the PRB resource used by the low-latency service is notified by the downlink control information DCI; or the PRB resource used by the low-latency service is notified by using a broadcast-type radio resource control RRC message or a dedicated RRC message.
  • the first configuration module is configured to use all resources as low-latency service resources when configuring MBSFN subframes for low-latency service transmission; and configure non-MBSFN subframes for low-latency service transmission when configuring non-MBSFN subframes Configure the intra-subframe resources occupied by the low-latency service and broadcast the information of the sub-frames configured with the low-latency service.
  • the configuration information of the low-latency service subframe includes at least one of the following parameters: a period parameter, a start position parameter, and a bitmap parameter; wherein:
  • the period parameter is used to describe the duration of the low-latency service subframe, in units of subframes
  • the starting position parameter is used to describe a starting position of a period, relative to a first subframe of a frame with a frame number of 0;
  • the bitmap parameter is used to describe a subframe for a low delay in a period.
  • the structure in the MBSFN subframe includes:
  • the orthogonal frequency division multiplexing OFDM symbol 7 and the OFDM symbol 8 in the MBSFN subframe are control domains of the low latency service, and the OFDM symbols 9 to OFDM symbols 13 are data domains of the low latency service; or,
  • Orthogonal Frequency Division Multiplexing (OFDM) symbol 7 in the MBSFN subframe is a control domain of the low-latency service, and the OFDM symbol 8 to OFDM symbol 13 are data fields of the low-latency service;
  • OFDM Orthogonal Frequency Division Multiplexing
  • the control domain of the low-latency service includes a physical hybrid automatic repeat indication channel SPCFICH information of a low-latency service and/or a physical control format indication channel SPHICH information of a low-latency service.
  • the cell-specific reference signal CRS is transmitted in the last 13 or 12 OFDM symbols in the MBSFN subframe.
  • the structure in the MBSFN subframe includes:
  • the physical downlink control channel SPDCCH information of the low latency service is located in the OFDM symbol in which the CRS is located.
  • the OFDM symbol corresponding to the SPDCCH information is one or two.
  • the total number of OFDM symbols corresponding to the SPDCCH information in the i-th MBSFN subframe is equal to the total number of OFDM symbols corresponding to the SPDCCH information in the i+1th MBSFN subframe, where i is a positive integer.
  • the TTIs of different durations multiplex the frequency domain resources in a frequency division manner, wherein the PDCCH domain corresponding to the first one or two OFDM symbols in the MBSFN subframe can schedule resources in any frequency domain.
  • the remaining TTIs in different frequency domains cannot perform SPDCCH cross-frequency domain scheduling.
  • the device provided by the present invention configures a low-latency service sub-frame and sends the configuration information to implement the same carrier in the low-latency service and the legacy service, and the low-latency service hardly affects the legacy service. Send and receive with good backward compatibility.
  • FIG. 10 is a structural diagram of an apparatus for receiving configuration information of a low latency service according to an embodiment of the present invention.
  • the device shown in Figure 10 includes:
  • the receiving module 1001 is configured to receive configuration information of a low latency service subframe.
  • the processing module 1002 is configured to receive data of the low latency service according to the configuration information of the low latency service subframe.
  • the processing module 1002 is configured to:
  • the user equipment determines The MBSFN subframe is a low-latency service subframe, and receives control information of data and/or low-latency service from the MBSFN subframe; wherein, when the user equipment is not configured to receive a legacy list in the MBSFN subframe When the service mode is broadcast, the user equipment determines that the MBSFN subframe is a low-latency service subframe.
  • the received subframe is an MBSFN subframe
  • the PDCCH information of the MBSFN subframe includes the DCI of the user equipment, and the user equipment is configured to be in a device that receives data in an MBSFN subframe
  • the user The device determines that the MBSFN subframe is a low-latency service subframe, and receives control information of data and/or low-latency service from the MBSFN subframe;
  • the received subframe is an MBSFN subframe
  • the PDCCH information of the MBSFN subframe includes the DCI of the user equipment, and the DCI is used to schedule a low-latency service
  • the user equipment Determining that the MBSFN subframe is a low-latency service subframe, and receiving control information of data and/or low-latency service from the MBSFN subframe;
  • the received subframe is a non-MBSFN subframe
  • the PDCCH information of the MBSFN subframe includes the DCI of the user equipment
  • the UE determines, by using signaling, that the non-MBSFN subframe is a low-latency service subframe.
  • the user equipment receives control information of the data and/or the low latency service from the non-MBSFN subframe.
  • the embodiment provided by the present invention receives the configuration information of the low-latency service subframe, and performs receiving processing on the data in the subframe by using the configuration information, so that the low-latency service and the legacy service coexist in the same carrier, and the low carrier is low.
  • the delay service hardly affects the sending and receiving of the legacy service, and has good backward compatibility.
  • all or part of the steps of the above embodiments may also be implemented by using an integrated circuit. These steps may be separately fabricated into individual integrated circuit modules, or multiple modules or steps may be fabricated into a single integrated circuit module. achieve. Thus, the invention is not limited to any specific combination of hardware and software.
  • the devices/function modules/functional units in the above embodiments may be implemented by a general-purpose computing device, which may be centralized on a single computing device or distributed over a network of multiple computing devices.
  • each device/function module/functional unit in the above embodiment When each device/function module/functional unit in the above embodiment is implemented in the form of a software function module and sold or used as a stand-alone product, it can be stored in a computer readable storage medium.
  • the above mentioned computer readable storage medium may be a read only memory, a magnetic disk or an optical disk or the like.
  • the foregoing technical solution can manage a subframe for transmitting a low-latency service, and can implement a low-latency service and a legacy service to coexist in the same carrier, and the low-latency service hardly affects the transmission and reception of the legacy service, and has a good Backward compatibility.

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

Abstract

Les modes de réalisation de la présente invention portent sur un procédé et un dispositif permettant d'émettre/de recevoir des informations de configuration d'un service à faible latence. Le procédé comprend les étapes suivantes : un site configure des sous-trames de service à faible latence, et émet les informations de configuration des sous-trames de service à faible latence ; les informations de configuration comprenant : les sous-trames de réseau monofréquence de service de diffusion/multidiffusion multimédia (MBSFN) configurées par le site utilisées pour une émission de service à faible latence et/ou des sous-trames autres que MBSFN configurées par le site utilisées pour une émission de service à faible latence, les sous-trames MBSFN ou les sous-trames autres que MBSFN utilisées pour une émission de service à faible latence utilisant un intervalle de temps d'émission (TTI) court en vue d'émettre des données.
PCT/CN2016/096563 2015-09-01 2016-08-24 Procédé et dispositif d'émission/réception d'informations de configuration de service à faible latence WO2017036328A1 (fr)

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