WO2018023906A1 - Procédé de communication et appareil de communication - Google Patents

Procédé de communication et appareil de communication Download PDF

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Publication number
WO2018023906A1
WO2018023906A1 PCT/CN2016/107954 CN2016107954W WO2018023906A1 WO 2018023906 A1 WO2018023906 A1 WO 2018023906A1 CN 2016107954 W CN2016107954 W CN 2016107954W WO 2018023906 A1 WO2018023906 A1 WO 2018023906A1
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Prior art keywords
bandwidth
downlink
uplink
transmission
reference signal
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PCT/CN2016/107954
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English (en)
Chinese (zh)
Inventor
李明菊
朱亚军
张云飞
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宇龙计算机通信科技(深圳)有限公司
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Publication of WO2018023906A1 publication Critical patent/WO2018023906A1/fr

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    • 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
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/56—Allocation or scheduling criteria for wireless resources based on priority criteria
    • H04W72/563—Allocation or scheduling criteria for wireless resources based on priority criteria of the wireless resources
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/56—Allocation or scheduling criteria for wireless resources based on priority criteria
    • H04W72/566—Allocation or scheduling criteria for wireless resources based on priority criteria of the information or information source or recipient
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/56—Allocation or scheduling criteria for wireless resources based on priority criteria
    • H04W72/566—Allocation or scheduling criteria for wireless resources based on priority criteria of the information or information source or recipient
    • H04W72/569—Allocation or scheduling criteria for wireless resources based on priority criteria of the information or information source or recipient of the traffic information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0446—Resources in time domain, e.g. slots or frames
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0453—Resources in frequency domain, e.g. a carrier in FDMA

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to a communication method and a communication device.
  • the existing 4G and 4.5G mobile communication technologies are based on LTE (Long Term Evolution) and LTE-A (LTE-Advanced) radio access technologies, time-frequency resource granularity and frame structure.
  • LTE Long Term Evolution
  • LTE-A Long Term Evolution-Advanced
  • frame structure mainly includes: FDD (Frequency Division Duplexing) frame structure, TDD (Time Division Duplexing) frame structure, and LAA (LTE Assisted Access) unlicensed carrier.
  • FDD Frequency Division Duplexing
  • TDD Time Division Duplexing
  • LAA LTE Assisted Access
  • each subframe is 1 ms
  • each subframe contains two slots
  • one slot is 0.5 ms
  • each slot contains 7 symbols.
  • the subcarrier spacing is mainly 15 kHz
  • one RB Resource Block
  • a new 3.75KHz subcarrier spacing is proposed in the NB-IoT (Narrow Band Internet of Things), and the carrier bandwidth of NB-IoT is only 180KHz.
  • both the FDD frame structure and the TDD frame structure use the 1 ms subframe as the time domain scheduling granularity, except for the DwPTS (Downlink Pilot Time Slot) in the special subframe in the TDD frame structure.
  • the time domain scheduling granularity is less than 1ms.
  • the downlink scheduling time domain granularity of multiplexing the DwPTS as the partial subframe also occurs, and the scheduling granularity of the 1 ms entire subframe is also used.
  • the other subframes are uplink transmission or downlink transmission or time domain separation or frequency domain separation. .
  • the current frame structure and the granularity of the frequency domain resources make the resource allocation not flexible enough, and the time interval between the uplink scheduling mechanism and the HARQ feedback mechanism causes a large delay, and the 20 MHz bandwidth does not satisfy the high bandwidth requirement.
  • the main scenarios of future 5G communication include the following three types: eMBB (enhanced Mobile Broadband), mMTC (massive machine type communication) and URLLC (Ultra-Reliable and Low Latency Communications). Delay communication).
  • the three types of scenarios are different for the type of business, and the requirements are different.
  • the two main indicators of the eMBB service are high bandwidth and low latency.
  • the eMBB service may support a large bandwidth of 100 MHz, and it is likely that the entire bandwidth is directly allocated to one user at a certain time.
  • the uplink scheduling delay and the HARQ feedback delay also have delay effects; the mMTC service requires a narrowband service and requires a long battery life. This service requires a smaller granularity of the frequency domain and a wider granularity of the time domain.
  • the URLLC service it is also necessary to reduce the delay caused by the uplink scheduling delay and the HARQ feedback delay.
  • the current fixed frame structure, the fixed frequency domain resource granularity, and the time domain resource granularity may cause a large uplink scheduling delay and a long HARQ feedback delay, and a smaller carrier.
  • Bandwidth can't meet the diversified needs of the business, and the future 5G communication hopes to be flexible enough, any resource can be dynamically scheduled for use at any time, and these are technical problems to be solved.
  • the present invention is based on at least one of the above technical problems, and proposes a new communication scheme, which can flexibly configure the position and number of uplink subframes in a radio frame according to an actual communication scenario, thereby improving resource scheduling.
  • a communication method including: configuring a radio frame that uses a downlink subframe as a start subframe; and transmitting scheduling signaling on the downlink subframe to An uplink subframe configured for uplink transmission is configured in the radio frame.
  • a downlink subframe as a radio frame of a start subframe, and transmitting scheduling signaling on the downlink subframe, to configure an uplink subframe for performing uplink transmission in the radio frame, so that
  • the location and number of uplink subframes in the radio frame can be flexibly configured according to actual communication scenarios (such as the type of communication service, uplink and downlink traffic, etc.), so that the base station and the terminal can be flexible.
  • the configured radio frame structure is used for communication, which avoids a large uplink scheduling delay and a long HARQ feedback delay caused by a fixed frame structure, and can improve resource scheduling flexibility and meet services in a 5G communication scenario. Demand is conducive to improving resource utilization.
  • the communication method further includes: configuring a periodic uplink subframe in the radio frame, where the periodic uplink subframe is used to transmit at least an uplink reference signal and/or a random Access preamble (ie, Random Access Preamble) and/or uplink scheduling request and/or cache status report.
  • a random Access preamble ie, Random Access Preamble
  • each The send window contains multiple times of transmission, as long as it is sent once at any one of the sending times.
  • the communication method further includes: configuring a first bandwidth and a second bandwidth that are used in pairs in a carrier aggregation manner, and the size of the first bandwidth and the second bandwidth The same and different frequency points, the first bandwidth and the second bandwidth can be used for uplink transmission and downlink transmission, wherein the first bandwidth is used for downlink transmission with higher priority than for uplink transmission.
  • the second bandwidth is used for uplink transmissions with higher priority than for downlink transmission.
  • the first bandwidth and the second bandwidth used in pairs may be bandwidths used in a conventional LTE FDD system, that is, the communication method proposed by the present invention can be compatible with a legacy LTE FDD system.
  • the first bandwidth and the second bandwidth can be flexibly scheduled according to actual communication scenarios, such as the type of communication service, uplink and downlink traffic, and the like.
  • the transmission of the corresponding service is beneficial to improve the efficiency of the spectrum, and solves the problem that the paired bandwidth in the traditional LTE FDD system can only be used for uplink and another user to downlink, resulting in low spectrum efficiency.
  • the communication method further includes: scheduling the second bandwidth to assist downlink transmission when the first bandwidth is insufficient to provide downlink transmission; and insufficient in the second bandwidth To provide uplink transmission, the first bandwidth is scheduled to assist in uplink transmission.
  • the second bandwidth is scheduled to assist the downlink transmission
  • the first bandwidth is scheduled to assist the uplink transmission
  • the communication method further includes: configuring the first bandwidth to be used by the first cell to form a downlink primary cell based on the first bandwidth, and configuring the second bandwidth Used by the second cell to form an uplink primary cell based on the second bandwidth; the system information of the downlink primary cell indicates the bandwidth value of the downlink primary cell, and the downlink primary cell passes the RRC (Radio Resource) Control, Radio Resource Control) signaling indicates the bandwidth value of the uplink primary cell.
  • RRC Radio Resource
  • Radio Resource Control Radio Resource Control
  • the bandwidth value of the downlink primary cell is indicated by a MIB (Master Information Block) in the system information of the downlink primary cell.
  • MIB Master Information Block
  • the transmission period of the downlink reference signal in the downlink primary cell is less than or equal to the transmission period of the downlink reference signal in the uplink primary cell; and the uplink reference signal in the uplink primary cell.
  • the transmission period is less than or equal to the transmission period of the uplink reference signal in the downlink primary cell.
  • the downlink reference signal in the downlink primary cell is used.
  • the transmission period is less than or equal to the transmission period of the downlink reference signal in the uplink primary cell; conversely, since the uplink primary cell is used for the uplink priority is higher than the downlink primary cell is used as the uplink priority, and the reference signal is used for The channel quality detection is performed, so the transmission period of the uplink reference signal in the uplink primary cell is less than or equal to the transmission period of the uplink reference signal in the downlink primary cell.
  • the communication method further includes: configuring a pairwise used bandwidth in the communication system to use the first bandwidth and the second bandwidth independently, the first bandwidth and the first
  • the second bandwidth can be used for uplink transmission and downlink transmission, and the priority of the first bandwidth for downlink transmission is higher than or equal to the priority for uplink transmission, and the second bandwidth is used for priority of uplink transmission.
  • the first bandwidth and the second bandwidth are allocated to two different cells, and the two different cells respectively indicate their own bandwidth values by using their own system information. .
  • the bandwidth used in the communication system is the bandwidth used in the traditional LTE FDD system, that is, the communication method proposed by the present invention can be compatible with the traditional LTE FDD system, and specifically can be used in the traditional LTE TDD system.
  • the bandwidth is allocated to different users of different cells and used separately.
  • the communication method further includes: multiplexing a downlink reference signal in the LTE system to identify the cell identity; or defining a new reference signal for identifying the cell identity.
  • the downlink reference signal in the LTE system may be multiplexed, including: PSS (Primary Synchronization Signal), SSS (Secondary Synchronization Signal) Signal), CRS (Common Reference Signal), CSI-RS (Channel State Information Reference Signal), but the time domain resources and/or frequency domain resources of these reference credits may be changed.
  • PSS/SSS sends at the same time but uses different frequency domain resources, which can speed up the downlink synchronization process.
  • a new reference signal can be defined.
  • the new reference signal does not need PSS/SSS, but a signal can be used to indicate the identity of the cell, without requiring the PSS and the SSS to jointly indicate the cell identity, and the PSS is not needed.
  • the relative position of the /SSS is to indicate whether it is an FDD system or a TDD system, because the communication scheme proposed by the present invention unifies the FDD system and the TDD system.
  • the communication method further includes: transmitting, by using a resource block that is consecutive in the frequency domain, the downlink reference signal or the one of the downlink reference signal or the system information.
  • System information or transmitting, in a transmission period of the downlink reference signal or the system information, the downlink reference signal or the system information by resource blocks uniformly distributed in the frequency domain or uniformly distributed over part of the bandwidth; The location of the resource block transmitting the downlink reference signal or the system information does not change or changes regularly during different transmission periods.
  • each transmission window in each transmission period of the downlink reference signal, and each transmission window includes multiple transmission times, which may be sent once at any one transmission time.
  • the communication method further includes: adding identifier information to the generated system information, where the identifier information is used to indicate that the communication system adopts a dynamic subframe configuration.
  • the communication system can be identified by adopting a new subframe configuration.
  • the identification can be performed in the form of an IE (Information Element).
  • a communication apparatus comprising: a configuration unit configured to configure a radio frame with a downlink subframe as a start subframe; and a sending unit configured to send on the downlink subframe Scheduling signaling to configure an uplink subframe for uplink transmission in the radio frame.
  • a downlink subframe as a radio frame of a start subframe, and transmitting scheduling signaling on the downlink subframe, to configure an uplink subframe for performing uplink transmission in the radio frame, so that
  • the location and number of uplink subframes in the radio frame can be flexibly configured according to actual communication scenarios (such as the type of communication service, uplink and downlink traffic, etc.), so that the base station and the terminal can be flexible.
  • the configured radio frame structure is used for communication, which avoids a large uplink scheduling delay and a long HARQ feedback delay caused by a fixed frame structure, and can improve resource scheduling flexibility and meet services in a 5G communication scenario. Demand is conducive to improving resource utilization.
  • the configuration unit is further configured to: configure a periodic uplink subframe in the radio frame, where the periodic uplink subframe is used to transmit at least an uplink reference signal and/or a random Access preamble and/or uplink scheduling request and/or cache status report.
  • each The send window contains multiple times of transmission, as long as it is sent once at any one of the sending times.
  • the configuring unit is further configured to: configure a first bandwidth and a second bandwidth that are used in pairs in a carrier aggregation manner, and the size of the first bandwidth and the second bandwidth The same and different frequency points, the first bandwidth and the second bandwidth can be used for uplink transmission and downlink transmission, wherein the first bandwidth is used for downlink transmission with higher priority than for uplink transmission.
  • the second bandwidth is used for uplink transmissions with higher priority than for downlink transmission.
  • the first bandwidth and the second bandwidth used in pairs may be bandwidths used in a conventional LTE FDD system, that is, the communication method proposed by the present invention can be compatible with a legacy LTE FDD system.
  • the first bandwidth and the second bandwidth can be flexibly scheduled according to actual communication scenarios, such as the type of communication service, uplink and downlink traffic, and the like.
  • the transmission of the corresponding service is beneficial to improve the efficiency of the spectrum, and solves the problem that the paired bandwidth in the traditional LTE FDD system can only be used for uplink and another user to downlink, resulting in low spectrum efficiency.
  • the communication device further includes: a scheduling unit, configured to: when the first bandwidth is insufficient to provide downlink transmission, schedule the second bandwidth to assist downlink transmission, and set When the second bandwidth is insufficient to provide uplink transmission, the first bandwidth is scheduled to assist in uplink transmission.
  • a scheduling unit configured to: when the first bandwidth is insufficient to provide downlink transmission, schedule the second bandwidth to assist downlink transmission, and set When the second bandwidth is insufficient to provide uplink transmission, the first bandwidth is scheduled to assist in uplink transmission.
  • the second bandwidth is scheduled to assist the downlink transmission
  • the first bandwidth is scheduled to assist the uplink transmission
  • the configuration unit is further configured to configure the first bandwidth to be used by the first cell to form a downlink primary cell based on the first bandwidth, and configure the second bandwidth
  • the second cell is used to form an uplink primary cell based on the second bandwidth
  • the communication device further includes: an indication unit, configured to indicate, by using system information of the downlink primary cell, a bandwidth value of the downlink primary cell, And indicating, by the downlink primary cell, a bandwidth value of the uplink primary cell by using RRC signaling.
  • the bandwidth value of the downlink primary cell is indicated by the MIB in the system information of the downlink primary cell.
  • the transmission period of the downlink reference signal in the downlink primary cell is less than or equal to the transmission period of the downlink reference signal in the uplink primary cell; and the uplink reference signal in the uplink primary cell.
  • the transmission period is less than or equal to the transmission period of the uplink reference signal in the downlink primary cell.
  • the downlink reference signal in the downlink primary cell is used.
  • the transmission period is less than or equal to the transmission period of the downlink reference signal in the uplink primary cell; conversely, since the uplink primary cell is used for the uplink priority is higher than the downlink primary cell is used as the uplink priority, and the reference signal is used for The channel quality detection is performed, so the transmission period of the uplink reference signal in the uplink primary cell is less than or equal to the transmission period of the uplink reference signal in the downlink primary cell.
  • the configuration unit is further configured to: configure a bandwidth used in pairs in the communication system as a first bandwidth and a second bandwidth that are used independently, the first bandwidth and the first
  • the second bandwidth can be used for uplink transmission and downlink transmission, and the priority of the first bandwidth for downlink transmission is higher than or equal to the priority for uplink transmission, and the second bandwidth is used for priority of uplink transmission. Or equal to the priority for downlink transmission, and used to allocate the first bandwidth and the second bandwidth to two different cell uses, where the two different cells respectively indicate by their own system information Its own bandwidth value.
  • the bandwidth used in the communication system is the bandwidth used in the traditional LTE FDD system, that is, the communication method proposed by the present invention can be compatible with the traditional LTE FDD system, and specifically can be used in the traditional LTE TDD system.
  • the bandwidth is allocated to different users of different cells and used separately.
  • the downlink reference signal in the LTE system is multiplexed to identify the cell identity; or a new reference signal for identifying the cell identity is defined.
  • the downlink reference signals in the LTE system may be multiplexed, including: PSS, SSS, CRS, CSI-RS, but the time domain of the transmission of these reference credits Resources and/or frequency domain resources may vary, such as PSS/SSS transmitting simultaneously but using different frequency domain resources, which can speed up the downlink synchronization process.
  • a new reference signal can be defined.
  • the new reference signal does not need PSS/SSS, but a signal can be used to indicate the identity of the cell, without requiring the PSS and the SSS to jointly indicate the cell identity, and the PSS is not needed.
  • the relative position of the /SSS is to indicate whether it is an FDD system or a TDD system, because the communication scheme proposed by the present invention unifies the FDD system and the TDD system.
  • the communication device further includes: a transmission unit configured to transmit the downlink by using a continuous resource block in a frequency domain during a transmission period of the downlink reference signal or the system information. Transmitting the downlink reference signal or the resource block in a frequency domain uniformly distributed over the entire bandwidth or evenly distributed over a part of the bandwidth in a transmission period of the downlink reference signal or the system information, or in a transmission period of the downlink reference signal or the system information System information; wherein the location of the resource block transmitting the downlink reference signal or the system information does not change or changes regularly during different transmission periods.
  • each transmission window in each transmission period of the downlink reference signal, and each transmission window includes multiple transmission times, which may be sent once at any one transmission time.
  • the communication device further includes: a processing unit configured to add identification information to the generated system information, the identification information being used to indicate that the communication system adopts a dynamic subframe configuration.
  • the communication system can be identified by adopting a new subframe configuration. Specifically, the identification can be performed in the form of IE.
  • the above technical solution can flexibly configure the position and number of uplink subframes in the radio frame according to the actual communication scenario, improve the flexibility of resource scheduling, and meet the service requirements in the 5G communication scenario.
  • FIG. 1 shows a schematic flow chart of a communication method according to an embodiment of the present invention
  • Figure 2 shows a schematic block diagram of a communication device in accordance with a first embodiment of the present invention
  • FIG. 3 is a schematic diagram showing the location of a resource block for transmitting a basic reference signal according to the first embodiment of the present invention
  • FIG. 4 is a schematic diagram showing the location of a resource block for transmitting a basic reference signal according to a second embodiment of the present invention
  • Fig. 5 shows a schematic block diagram of a communication device in accordance with a second embodiment of the present invention.
  • FIG. 1 shows a schematic flow chart of a communication method in accordance with an embodiment of the present invention.
  • a communication method includes:
  • Step S10 configuring a downlink subframe as a radio frame of the starting subframe.
  • Step S12 Send scheduling signaling on the downlink subframe to configure an uplink subframe for performing uplink transmission in the radio frame.
  • the downlink subframe is configured as a radio frame of the start subframe, and scheduling signaling is sent on the downlink subframe to configure an uplink subframe for performing uplink transmission in the radio frame.
  • the frame is configured to flexibly configure the position and number of uplink subframes in the radio frame according to an actual communication scenario (such as the type of communication service, uplink and downlink traffic, etc.), thereby enabling the base station to
  • the terminal can communicate based on the flexible configuration of the radio frame structure, avoiding a large frame scheduling delay and a long HARQ feedback delay caused by a fixed frame structure, and can improve resource scheduling flexibility and satisfy 5G communication.
  • the business needs in the scenario are conducive to improving resource utilization.
  • the communication method further includes: configuring a periodic uplink subframe in the radio frame, where the periodic uplink subframe is used to transmit at least an uplink reference signal and/or a random access preamble and/or Or an upstream scheduling request and/or a cache status report.
  • each The send window contains multiple times of transmission, as long as it is sent once at any one of the sending times.
  • the method further includes: multiplexing a downlink reference signal in an LTE system to identify a cell identity; or defining a new one for performing cell identity.
  • the reference signal for the identification is not limited to: multiplexing a downlink reference signal in an LTE system to identify a cell identity; or defining a new one for performing cell identity.
  • the downlink reference signals in the LTE system may be multiplexed, including: PSS, SSS, CRS, CSI-RS, but the time domain of the transmission of these reference credits Resources and/or frequency domain resources may vary, such as PSS/SSS transmitting simultaneously but using different frequency domain resources, which can speed up the downlink synchronization process.
  • a new reference signal can be defined.
  • the new reference signal does not need PSS/SSS, but a signal can be used to indicate the identity of the cell, without requiring the PSS and the SSS to jointly indicate the cell identity, and the PSS is not needed.
  • the relative position of the /SSS is to indicate whether it is an FDD system or a TDD system, because the communication scheme proposed by the present invention unifies the FDD system and the TDD system.
  • the communication method further includes: transmitting, by using a resource block that is consecutive in the frequency domain, the downlink reference signal or the system information in a transmission period of the downlink reference signal or the system information; Or transmitting, in a transmission period of the downlink reference signal or the system information, the downlink reference signal or the system information by a resource block uniformly distributed in the frequency domain or evenly distributed over a part of the bandwidth; wherein, the transmission station The location of the resource block of the downlink reference signal or the system information does not change or changes regularly during different transmission periods.
  • each transmission window in each transmission period of the downlink reference signal, and each transmission window includes multiple transmission times, which may be sent once at any one transmission time.
  • the communication method further includes: adding identifier information to the generated system information, where the identifier information is used to indicate that the communication system adopts a dynamic subframe configuration.
  • the communication system can be identified by adopting a new subframe configuration. Specifically, the identification can be performed in the form of IE.
  • the present invention proposes the following scheme:
  • the foregoing communication method further includes: configuring a first bandwidth and a second bandwidth that are used in pairs in a carrier aggregation manner, where the first bandwidth and the second bandwidth are the same and the frequency points are different, the first bandwidth and The second bandwidth can be used for uplink transmission and downlink transmission, where the first bandwidth is used for downlink transmission with higher priority than for uplink transmission, and the second bandwidth is used for uplink transmission priority.
  • the level is higher than the priority for downlink transmission.
  • the first bandwidth and the second bandwidth used in pairs may be bandwidths used in a conventional LTE FDD system, that is, the communication method proposed by the present invention can be compatible with a legacy LTE FDD system.
  • the first bandwidth and the second bandwidth can be flexibly scheduled according to actual communication scenarios, such as the type of communication service, uplink and downlink traffic, and the like.
  • the transmission of the corresponding service is beneficial to improve the efficiency of the spectrum, and solves the problem that the paired bandwidth in the traditional LTE FDD system can only be used for uplink and another user to downlink, resulting in low spectrum efficiency.
  • scheduling the second bandwidth to assist downlink transmission when the first bandwidth is insufficient to provide downlink transmission, scheduling the second bandwidth to assist downlink transmission; and when the second bandwidth is insufficient to provide uplink transmission, scheduling the first bandwidth to assist Perform uplink transmission.
  • the second bandwidth is scheduled to assist the downlink transmission
  • the first bandwidth is scheduled to assist the uplink transmission
  • the communication method further includes: configuring the first bandwidth to be used by the first cell to form a downlink primary cell based on the first bandwidth, and configuring the second bandwidth to be used by the second cell,
  • the uplink primary cell that is based on the second bandwidth is formed; the system information of the downlink primary cell indicates the bandwidth value of the downlink primary cell, and the downlink primary cell indicates the uplink primary cell by using RRC signaling. Bandwidth value.
  • the bandwidth value of the downlink primary cell is indicated by the MIB in the system information of the downlink primary cell.
  • the transmission period of the downlink reference signal in the downlink primary cell is less than or equal to the transmission period of the downlink reference signal in the uplink primary cell; and the uplink reference signal in the uplink primary cell.
  • the transmission period is less than or equal to the transmission period of the uplink reference signal in the downlink primary cell.
  • the downlink reference signal in the downlink primary cell is used.
  • the transmission period is less than or equal to the transmission period of the downlink reference signal in the uplink primary cell; conversely, since the uplink primary cell is used for the uplink priority is higher than the downlink primary cell is used as the uplink priority, and the reference signal is used for The channel quality detection is performed, so the transmission period of the uplink reference signal in the uplink primary cell is less than or equal to the transmission period of the uplink reference signal in the downlink primary cell.
  • the foregoing communication method further includes: configuring a bandwidth used in pairs in the communication system as a first bandwidth and a second bandwidth that are used independently, and the first bandwidth and the second bandwidth are both used for uplink transmission and downlink transmission, And the priority of the first bandwidth for the downlink transmission is higher than or equal to the priority for the uplink transmission, and the priority of the second bandwidth for the uplink transmission is higher than or equal to the priority for the downlink transmission;
  • the first bandwidth and the second bandwidth are allocated to two different cells, and the two different cells respectively indicate their own bandwidth values through their own system information.
  • the bandwidth used in the communication system is the bandwidth used in the traditional LTE FDD system, that is, the communication method proposed by the present invention can be compatible with the traditional LTE FDD system, and specifically can be used in the traditional LTE TDD system.
  • the bandwidth is allocated to different users of different cells and used separately.
  • Fig. 2 shows a schematic block diagram of a communication device in accordance with a first embodiment of the present invention.
  • a communication device 200 includes a configuration unit 202 and a transmitting unit 204.
  • the configuration unit 202 is configured to configure a radio frame with the downlink subframe as the starting subframe.
  • the sending unit 204 is configured to send scheduling signaling on the downlink subframe, where the radio frame is configured to perform uplink.
  • the uplink subframe transmitted.
  • a downlink subframe as a radio frame of a start subframe, and transmitting scheduling signaling on the downlink subframe, to configure an uplink subframe for performing uplink transmission in the radio frame, so that
  • the location and number of uplink subframes in the radio frame can be flexibly configured according to actual communication scenarios (such as the type of communication service, uplink and downlink traffic, etc.), so that the base station and the terminal can be flexible.
  • the configured radio frame structure is used for communication, which avoids a large uplink scheduling delay and a long HARQ feedback delay caused by a fixed frame structure, and can improve resource scheduling flexibility and meet services in a 5G communication scenario. Demand is conducive to improving resource utilization.
  • the configuration unit 202 is further configured to: configure a periodic uplink subframe in the radio frame, where the periodic uplink subframe is used to transmit at least an uplink reference signal and/or Random access preamble and/or uplink scheduling request and/or buffer status report.
  • each The send window contains multiple times of transmission, as long as it is sent once at any one of the sending times.
  • the configuration unit 202 is further configured to: configure a first bandwidth and a second bandwidth that are used in pairs in a carrier aggregation manner, where the first bandwidth and the second bandwidth are The first bandwidth and the second bandwidth are both used for uplink transmission and downlink transmission, wherein the first bandwidth is used for downlink transmissions with higher priority than for uplink transmission.
  • the priority of the second bandwidth for uplink transmission is higher than the priority for downlink transmission.
  • the first bandwidth and the second bandwidth used in pairs may be bandwidths used in a conventional LTE FDD system, that is, the communication method proposed by the present invention can be compatible with a legacy LTE FDD system.
  • the first bandwidth and the second bandwidth can be flexibly scheduled according to actual communication scenarios, such as the type of communication service, uplink and downlink traffic, and the like.
  • the transmission of the corresponding service is beneficial to improve the efficiency of the spectrum, and solves the problem that the paired bandwidth in the traditional LTE FDD system can only be used for uplink and another user to downlink, resulting in low spectrum efficiency.
  • the communication device 200 further includes: a scheduling unit 206, configured to schedule the second bandwidth to assist in downlink transmission when the first bandwidth is insufficient to provide downlink transmission, and The first bandwidth is scheduled to assist in uplink transmission when the second bandwidth is insufficient to provide uplink transmission.
  • a scheduling unit 206 configured to schedule the second bandwidth to assist in downlink transmission when the first bandwidth is insufficient to provide downlink transmission, and The first bandwidth is scheduled to assist in uplink transmission when the second bandwidth is insufficient to provide uplink transmission.
  • the second bandwidth is scheduled to assist the downlink transmission
  • the first bandwidth is scheduled to assist the uplink transmission
  • the configuration unit 202 is further configured to configure the first bandwidth to be used by the first cell to form a downlink primary cell based on the first bandwidth, and the second bandwidth is used.
  • the configuration is used by the second cell to form an uplink primary cell based on the second bandwidth.
  • the communication device 200 further includes: an instructing unit 208, configured to indicate, by using system information of the downlink primary cell, the downlink primary cell. a bandwidth value, and the downlink primary cell indicates the bandwidth value of the uplink primary cell by using RRC signaling.
  • the bandwidth value of the downlink primary cell is indicated by the MIB in the system information of the downlink primary cell.
  • the transmission period of the downlink reference signal in the downlink primary cell is less than or equal to the transmission period of the downlink reference signal in the uplink primary cell; and the uplink reference signal in the uplink primary cell.
  • the transmission period is less than or equal to the transmission period of the uplink reference signal in the downlink primary cell.
  • the downlink reference signal in the downlink primary cell is used.
  • the transmission period is less than or equal to the transmission period of the downlink reference signal in the uplink primary cell; conversely, since the uplink primary cell is used for the uplink priority is higher than the downlink primary cell is used as the uplink priority, and the reference signal is used for The channel quality detection is performed, so the transmission period of the uplink reference signal in the uplink primary cell is less than or equal to the transmission period of the uplink reference signal in the downlink primary cell.
  • the configuration unit 202 is further configured to: configure, in a communication system, a pair of used bandwidths into a first bandwidth and a second bandwidth that are used independently, the first bandwidth and the The second bandwidth can be used for uplink transmission and downlink transmission, and the priority of the first bandwidth for downlink transmission is higher than or equal to the priority for uplink transmission, and the second bandwidth is used for priority of uplink transmission. Higher than or equal to the priority for downlink transmission, and used to allocate the first bandwidth and the second bandwidth to two different cell uses, wherein the two different cells respectively pass their own system information Indicates its own bandwidth value.
  • the bandwidth used in the communication system is the bandwidth used in the traditional LTE FDD system, that is, the communication method proposed by the present invention can be compatible with the traditional LTE FDD system, and specifically can be used in the traditional LTE TDD system.
  • the bandwidth is allocated to different users of different cells and used separately.
  • the downlink reference signal in the LTE system is multiplexed to identify the cell identity; or a new reference signal for identifying the cell identity is defined.
  • the downlink reference signals in the LTE system may be multiplexed, including: PSS, SSS, CRS, CSI-RS, but the time domain of the transmission of these reference credits Resources and/or frequency domain resources may vary, such as PSS/SSS transmitting simultaneously but using different frequency domain resources, which can speed up the downlink synchronization process.
  • a new reference signal can be defined.
  • the new reference signal does not need PSS/SSS, but a signal can be used to indicate the identity of the cell, without requiring the PSS and the SSS to jointly indicate the cell identity, and the PSS is not needed.
  • the relative position of the /SSS is to indicate whether it is an FDD system or a TDD system, because the communication scheme proposed by the present invention unifies the FDD system and the TDD system.
  • the communication device 200 further includes: a transmission unit 210 configured to transmit the downlink by a continuous resource block in a frequency domain during a transmission period of the downlink reference signal or system information. Transmitting the downlink reference signal or the resource block in a frequency domain uniformly distributed over the entire bandwidth or evenly distributed over a part of the bandwidth in a transmission period of the downlink reference signal or the system information, or in a transmission period of the downlink reference signal or the system information System information; wherein the location of the resource block transmitting the downlink reference signal or the system information does not change or changes regularly during different transmission periods.
  • each transmission window in each transmission period of the downlink reference signal, and each transmission window includes multiple transmission times, which may be sent once at any one transmission time.
  • the communication device 200 further includes: a processing unit 212 configured to add identification information to the generated system information, the identification information being used to indicate that the communication system adopts a dynamic subframe configuration.
  • the communication system can be identified by adopting a new subframe configuration. Specifically, the identification can be performed in the form of IE.
  • the technical solution of the present invention is mainly for a fixed frame structure, a fixed frequency domain resource granularity, and a time domain resource granularity, which may cause a large uplink scheduling delay and a long HARQ feedback delay, and a smaller carrier.
  • the technical problem that the bandwidth cannot meet the diversified needs of the service and a technical solution suitable for the 5G communication scenario is proposed, which specifically includes the following aspects:
  • the frame structure adopted by the 5G NR may adopt a dynamic frame structure. Specifically, the subframe in the radio frame starts with the following downlink subframe by default, and the uplink subframe is determined and triggered by the base station through DCI scheduling signaling. The subframe in the radio frame starts with the following downlink subframe.
  • the downlink subframe here may be one or more complete downlink subframes, or only a part of a complete downlink subframe, that is, a certain subframe. Only the first half of the frame is used for downstream transmission.
  • a part of the periodically appearing subframes can be configured as an uplink subframe.
  • the uplink subframes are used to send the uplink reference signal SRS (Sounding Reference Signal, channel sounding reference signal) and/or uplink scheduling.
  • Request ie, Scheduling Request
  • Buffer Status Report or Buffer Status Report
  • random access preamble ie, Scheduling Request
  • each The send window contains multiple transmission times, as long as it is sent once in any one transmission time.
  • the present invention proposes the following two methods of use:
  • the paired bandwidth in the legacy LTE FDD system can be reused, or the new paired used bandwidth can be configured.
  • the paired bandwidth is the same size, but the frequency is different.
  • LTE_DL_BW a segment of bandwidth is used only for uplink
  • LTE_UL_BW a segment of bandwidth is used only for uplink
  • the traditional bandwidth for downlink can be used for downlink and uplink
  • the traditional bandwidth for uplink can also be used for uplink and downlink.
  • the conventional bandwidth for uplink is scheduled to be used for downlink transmission.
  • the conventional bandwidth for downlink is scheduled to be used for uplink transmission only when the legacy bandwidth for uplink (ie, LTE_UL_BW) is insufficient to provide uplink transmission.
  • the two segments of the LTE_DL_BW and the LTE_UL_BW can be configured to be used for carrier aggregation by two independent unpaired carriers.
  • the traditional downlink carrier is configured as a downlink PCell (Primary Cell primary cell), and the conventional uplink carrier is configured as an uplink PCell, that is, the uplink and downlink are separated.
  • the paired bandwidths When the paired bandwidths are not used together, the paired bandwidths can be completely separated and distributed to different users, so that each user can only detect the uplink carrier frequency or the downlink carrier frequency in the paired bandwidth at the same time, then the user works.
  • the cell on this carrier frequency is used as the uplink and downlink carrier frequency on this carrier frequency, that is, similar to the existing TDD.
  • the paired bandwidth When the paired bandwidth is used together, it is equivalent to assigning each of the paired bandwidths to one cell (cell), such as LTE_DL_BW is allocated to cell#1, LTE_UL_BW is allocated to cell#2, and LTE_DL_BW is used.
  • Cell#1 is the downlink PCell, and cell#1 indicates the value of LTE_DL_BW through the MIB in the system information.
  • the LTE_UL_BW of the cell #2 is the uplink PCell, and the downlink of the cell #2 is used as the SCell (Secondary Cell).
  • the bandwidth value of the cell #2 can be transmitted by the downlink PCell, that is, the cell #1 by RRC signaling.
  • LTE_DL_BW and LTE_UL_BW are respectively uplink and downlink of different cells, and then the two cells respectively indicate their own bandwidth by using their own MIB information. In this case, whether LTE_UL_BW is used as the uplink or higher or equal to the downlink, and LTE_DL_BW is used as the downlink or higher or equal to the uplink.
  • the basic reference signal has a long transmission period, for example, 40ms/80ms/160ms, and can be sent once every cycle, and the duration of each transmission is short (less than 1ms, or less than 1 subframe length).
  • the duration of each transmission is short (less than 1ms, or less than 1 subframe length).
  • the period of the downlink reference signal using cell#1 of LTE_DL_BW may be smaller than the period of the downlink reference signal of cell#2 using LTE_UL_BW, because the latter has a higher priority for uplink use.
  • the period of the uplink reference signal using cell #1 of LTE_DL_BW may be larger than the period of the uplink reference signal of cell #2 using LTE_UL_BW, because the former has a higher priority for downlink use.
  • the PSS/SSS/CRS/CSI-RS in the legacy LTE can be multiplexed. It is also possible to define a new reference signal, for example, a new reference signal does not need to use PSS/SSS, but a signal can be used to indicate the identity of the cell, and there is no need for the PSS and the SSS to jointly indicate the identity of the cell, nor The relative position of the PSS/SSS is required to indicate whether the communication system is an FDD system or a TDD system, because the technical solution of the present invention has unified the structure of the FDD and the TDD.
  • Frequency domain configuration of the basic reference signal The transmission bandwidth of the basic reference signal only needs to occupy a part of RB (Resource Block).
  • these RBs may be consecutive RBs, and this part of the continuous RB position may change regularly with time.
  • the RBs may be discontinuous RBs, and the RBs are evenly distributed over the entire bandwidth or evenly distributed over a part of the bandwidth (for example, some bandwidth needs to be vacant for future services, and then the basic reference signal is not sent on the part of the bandwidth. Therefore, the RBs that transmit the reference signals are evenly distributed over other bandwidths.
  • these RB positions may also change regularly with time.
  • the number, distribution position, and variation rule of the consecutive RBs or non-contiguous RBs for transmitting the basic reference signal need to be stored in the terminal, so that the terminal searches for the reference signal according to the stored information to the corresponding location.
  • the reference signal of cell #1 using LTE_DL_BW is transmitted on the bandwidth corresponding to LTE_DL_BW
  • the reference signal of cell#2 using LTE_UL_BW is transmitted on the bandwidth corresponding to LTE_UL_BW, which requires Compared with the LTE user, the NR user searches for the frequency point of the LTE_UL_BW for the uplink in addition to the frequency of the LTE_DL_BW for the downlink.
  • the MIB and other SIB (System Information Block) information can be sent only on a part of the bandwidth, and the period is long (for example, the duration occupied by 40 ms or 40 subframes).
  • the MIB can also be transmitted in the manner shown in Figures 3 and 4 like the basic reference signal.
  • the sending time of the MIB and other SIB information and the occupied RB position may be different, but they do not occupy the entire bandwidth.
  • the IE (information element) of the tdd-config included in the SIB1 in the original LTE system can be removed, and an IE added in the SIB1 is indicated as NR, and the user can It is known that the frame structure is neither FDD nor TDD, but the frame structure of NR.
  • the technical solution of the present invention not only gives a method for using a paired carrier frequency in a 5G NR, but also provides a bandwidth configuration under a new frame structure, and a configuration of a downlink reference signal and the like in a corresponding bandwidth, so that Paired carrier frequencies are flexible and forward compatible.
  • Fig. 5 shows a schematic block diagram of a communication device in accordance with a second embodiment of the present invention.
  • a communication apparatus includes a processor 1, an output device 2, and a memory 3.
  • the processor 1, the output device 2, and the memory 3 may be connected by a bus 4 or the like, and the connection through the bus 4 is exemplified in FIG.
  • the memory 3 is used to store a set of program codes, and the processor 1 calls the program code stored in the memory 3 for performing the following operations:
  • the scheduling signaling is sent by the output device 2 on the downlink subframe to configure an uplink subframe for performing uplink transmission in the radio frame.
  • the processor 1 calls the program code stored in the memory 3, and is also used to perform the following operations:
  • a periodic uplink subframe is configured in the radio frame, where the periodic uplink subframe is used to transmit at least an uplink reference signal and/or a random access preamble and/or an uplink scheduling request and/or a buffer status report.
  • the processor 1 calls the program code stored in the memory 3, and is also used to perform the following operations:
  • the processor 1 calls the program code stored in the memory 3, and is also used to perform the following operations:
  • the first bandwidth is scheduled to assist in uplink transmission.
  • the processor 1 calls the program code stored in the memory 3, and is also used to perform the following operations:
  • the system information of the downlink primary cell indicates the bandwidth value of the downlink primary cell, and the downlink primary cell indicates the bandwidth value of the uplink primary cell by using RRC signaling.
  • the processor 1 calls the program code stored in the memory 3, and is also used to perform the following operations:
  • the bandwidth used in pairs in the communication system is configured as a first bandwidth and a second bandwidth that are used independently, and the first bandwidth and the second bandwidth are both used for uplink transmission and downlink transmission, and the first bandwidth is used for
  • the priority of the downlink transmission is higher than or equal to the priority for the uplink transmission
  • the priority of the second bandwidth for the uplink transmission is higher than or equal to the priority for the downlink transmission
  • the first bandwidth and the second bandwidth are allocated to two different cells, and the two different cells respectively indicate their own bandwidth values through their own system information.
  • the processor 1 calls the program code stored in the memory 3, and is also used to perform the following operations:
  • a new reference signal for identifying the identity of the cell is defined.
  • the processor 1 calls the program code stored in the memory 3, and is also used to perform the following operations:
  • a resource block uniformly distributed over the entire bandwidth or evenly distributed over a part of the bandwidth transmits the downlink reference signal or the system information
  • the location of the resource block that transmits the downlink reference signal or the system information does not change or changes regularly during different transmission periods.
  • the processor 1 calls the program code stored in the memory 3, and is also used to perform the following operations:
  • the identification information is added to the generated system information, and the identification information is used to indicate that the communication system adopts a dynamic subframe configuration.
  • the units in the communication device of the embodiment of the present invention may be combined, divided, and deleted according to actual needs.
  • ROM Read-Only Memory
  • RAM Random Access Memory
  • PROM Programmable Read-Only Memory
  • EPROM Erasable Programmable Read Only Memory
  • OTPROM One-Time Programmable Read-Only Memory
  • EEPROM Electronically-Erasable Programmable Read-Only Memory
  • CD-ROM Compact Disc Read-Only Memory
  • the present invention provides a new communication scheme, which can flexibly configure the position and number of uplink subframes in a radio frame according to an actual communication scenario.
  • the flexibility of resource scheduling meets the business needs in the 5G communication scenario.

Abstract

La présente invention concerne un procédé de communication et un appareil de communication, le procédé de communication comprenant : la configuration d'une trame sans fil pour utiliser une sous-trame de liaison descendante en tant que sous-trame initiale ; l'envoi d'une signalisation de planification sur la sous-trame de liaison descendante, afin de configurer une sous-trame de liaison montante dans la trame sans fil afin de mettre en œuvre une transmission de liaison montante. La solution technique de la présente invention peut configurer de manière flexible la position et le nombre de sous-trames de liaison montante dans la trame sans fil sur la base de scénarios de communication pratiques, en améliorant la flexibilité de la planification des ressources et en satisfaisant les exigences de service pour la communication 5G.
PCT/CN2016/107954 2016-08-05 2016-11-30 Procédé de communication et appareil de communication WO2018023906A1 (fr)

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