WO2016078396A1 - Procédé et dispositif pour occuper une porteuse non autorisée - Google Patents

Procédé et dispositif pour occuper une porteuse non autorisée Download PDF

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Publication number
WO2016078396A1
WO2016078396A1 PCT/CN2015/080993 CN2015080993W WO2016078396A1 WO 2016078396 A1 WO2016078396 A1 WO 2016078396A1 CN 2015080993 W CN2015080993 W CN 2015080993W WO 2016078396 A1 WO2016078396 A1 WO 2016078396A1
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Prior art keywords
signaling
unlicensed spectrum
resource
data
information
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PCT/CN2015/080993
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English (en)
Chinese (zh)
Inventor
李新彩
苟伟
彭佛才
赵亚军
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中兴通讯股份有限公司
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Publication of WO2016078396A1 publication Critical patent/WO2016078396A1/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

Definitions

  • This document relates to wireless communication technologies, and in particular, to a method and a device for occupying an unlicensed carrier.
  • LTE Long Term Evolution
  • M2M machine to machine
  • V2V vehicle to vehicle
  • the unlicensed carrier may be an important evolution direction of the wireless communication system, but at the same time, there are also many problems. For example, there are various wireless systems in the unlicensed carrier, which are difficult to coordinate with each other and have serious interference.
  • LTE carrier aggregation
  • DC Dual Connectivity
  • the uplink transmission is performed on the unlicensed carrier by the LTE authorized carrier cross-carrier scheduling, that is, the uplink transmission time of the unlicensed carrier is n+k; (LBT, Listening Before Transmission)
  • LBT Listening Before Transmission
  • the U carrier (Unlicensed Carrier) resource is occupied, if the eNB does not successfully seize the U resource at the time of approaching n+k, the possible causes include: regression of the primary system.
  • the unlicensed carrier scheduling timing and the carrier occupation time do not match, if the UE still follows the original
  • the scheduling timing is performed on the unlicensed carrier, considering that the devices of other systems are transmitting on the same unlicensed carrier, the data transmission performance of the physical uplink shared channel (PUSCH) of the UE at time n+k is affected, and at the same time Will reduce the data transmission performance of other system devices.
  • PUSCH physical uplink shared channel
  • the first transmission and the retransmission of data need to be on the same carrier, assuming that the unlicensed carrier at the time of n+k is successfully used by the LBT, and the UE is at n+ At time k, the data is transmitted using the unlicensed carrier.
  • the data is erroneous.
  • the UE needs to perform data retransmission at the predefined HARQ timing, for example, data retransmission at the subframe n+k+m. Therefore, if the LBT mechanism is used to successfully compete for the unlicensed carrier at the subframe n+k+m, the above-mentioned problem that the unlicensed carrier scheduling timing and the carrier occupation timing do not match may also occur.
  • the time occupied by an unlicensed resource is continuously occupied for a period of time, and in LTE, scheduling and data transmission, and the first transmission and retransmission of a certain data packet are not continuously performed, and there is a section in the middle. Interval, therefore, if the method of continuously occupying resources causes waste of resources, and there is a problem that the resource occupation flexibility is not high.
  • the embodiment of the invention provides a method and a device for occupying an unlicensed carrier to solve the problem of waste of unauthorized resources.
  • An embodiment of the present invention provides a method for occupying an unlicensed carrier, including:
  • the first device sends data to the second device or stops sending data according to the signaling for indicating unlicensed spectrum resource information.
  • the first device sends signaling for indicating unlicensed spectrum resource information to the second device, including:
  • the first device sends the unlicensed spectrum resource indication signaling to the second device by using an air interface on the common carrier channel.
  • the unlicensed spectrum resource information includes one or more of the following:
  • the first device on the unlicensed spectrum occupies the time domain location information of the data transmission data
  • the first device on the unlicensed spectrum stops transmitting data time domain location information in the occupied resources
  • the first device on the unlicensed spectrum adds the time domain location information of the sent data after the resource is occupied.
  • the first device sends signaling for indicating unlicensed spectrum resource information to the second device, including:
  • the first device sends, by using a special occupation signal or signaling, signaling for indicating that the first device on the unlicensed spectrum occupies the time domain location information of the resource transmission data; or
  • the first device sends, by using a special occupation signal or signaling, signaling for indicating that the first device on the unlicensed spectrum adds the time domain location information after sending the data.
  • the first device sends signaling for indicating unlicensed spectrum resource information to the second device, including:
  • the first device indicates, by using physical layer downlink control signaling (DCI), that the first device on the unlicensed spectrum occupies the resource to transmit the time domain location information; or
  • DCI physical layer downlink control signaling
  • the first device indicates, by using physical layer downlink control signaling (DCI) and/or relative to the initial offset value, that the first device on the unlicensed spectrum newly adds the data time domain location information after the occupied resource.
  • DCI physical layer downlink control signaling
  • the first device uses the reserved bit status of a carrier indication bit field (CIF) in the DCI to indicate unlicensed spectrum resource information; or, in a bitmap manner, indicates unlicensed spectrum resource information; or Unauthorized spectrum resource information is indicated by setting a dedicated bit in the DCI.
  • CIF carrier indication bit field
  • the first device sends signaling for indicating unlicensed spectrum resource information to the second device, including:
  • the first device is carried by a common search space of a physical downlink control channel PDCCH or an enhanced physical downlink control channel EPDCCH, and the message for indicating unlicensed spectrum resource information is scrambled by a specially-defined wireless network temporary identifier RNTI make.
  • the first device on the unlicensed spectrum indicated by the unlicensed spectrum resource information occupies the time domain location information of the resource sending data and/or the first device on the unlicensed spectrum adds the resource after the resource is occupied.
  • the time domain location information of the transmitted data includes a plurality of non-contiguous moments.
  • the time domain granularity of the indicated time is a subframe or an orthogonal frequency division multiplexing OFDM symbol.
  • the moment that the first device sends signaling for indicating the unlicensed spectrum resource information to the second device is M, and the first device is used to indicate the unlicensed spectrum according to the The timing of signaling the data of the resource information satisfies any of the following conditions:
  • N is an integer greater than or equal to zero.
  • the data sent by the first device to the second device according to the signaling used to indicate the unlicensed spectrum resource information includes transmitting uplink/downlink data of scheduling, or transmitting feedback information or High priority information.
  • the first device sends a second device to indicate an unlicensed frequency.
  • the method further includes:
  • Domain location information or
  • the first device determines, according to the measurement result, the time domain location information of the first device occupying the resource transmission data on the unlicensed spectrum, the time domain location information of the first device on the unlicensed spectrum, and the unlicensed spectrum on the unoccupied resource.
  • a device adds one or more of the domain location information of the transmitted data after the resource is occupied.
  • the data sent by the first device to the second device according to the signaling used to indicate the unlicensed spectrum resource information is retransmitted data, and the method further includes: the retransmission number has reached the maximum weight If the number of transmissions is still not received correctly, the first device performs one of the following processing:
  • the contention of the unlicensed carrier is resumed until the carrier is contending for transmission or retransmission.
  • the foregoing method further includes:
  • the second device receives the signaling for indicating the unlicensed spectrum resource information, and obtains the unlicensed spectrum resource usage information by using the signaling for indicating the unlicensed spectrum resource information;
  • the second device reserves the unlicensed carrier resource at the corresponding moment according to the unlicensed spectrum resource usage information, or starts competing for the resource at the moment when the resource is released.
  • the second device obtains the unlicensed spectrum resource usage information by using the signaling for indicating the unlicensed spectrum resource information, and obtains the information by using the detected signal or the received feedback. Unlicensed spectrum resource usage information.
  • the embodiment of the invention further provides a method for occupying an unlicensed carrier, including:
  • the receiving device reserves the unlicensed carrier resource at the corresponding moment according to the acquired unlicensed spectrum resource usage information, or starts competing for the resource at the moment when the resource is released.
  • the unlicensed spectrum resource information includes one or more of the following:
  • the location device information of the sending end device stops transmitting data in the occupied resource on the unlicensed spectrum
  • the sending device adds the time domain location information of the sent data after the resources are occupied.
  • the method further includes: when the unlicensed spectrum resource information includes a time domain location information that is sent by the sending end device on the unlicensed spectrum, and the sending end device uses the resource in the unlicensed spectrum.
  • the source device in the unlicensed spectrum on the unlicensed spectrum stops transmitting data in the occupied resource, and/or the unseen spectrum on the unlicensed device adds new data after the occupied resource Domain location information.
  • the receiving end device stops the sending of the data in the occupied resource on the unlicensed spectrum of the corresponding subframe based on the pre-defined pattern and the pattern relationship of the receiving moment of the signaling.
  • the location information and/or the unlicensed spectrum device adds the time domain location information of the data after the resource is occupied.
  • the receiving end device receives signaling that is used by the sending end to indicate unlicensed spectrum resource information, and includes:
  • the receiving end device receives the unlicensed spectrum resource indication signaling on an agreed carrier common channel by using an air interface.
  • the receiving end device receives signaling that is used by the sending end to indicate unlicensed spectrum resource information, and includes:
  • the receiving end device receives, by using a special occupation signal or signaling, signaling for indicating that the signaling sending end of the unlicensed spectrum newly adds the data time domain location information after the occupied resource is used.
  • the receiving end device receives signaling that is used by the sending end to indicate unlicensed spectrum resource information, and includes:
  • the receiving end device obtains time domain location information of the data transmission data occupied by the signaling sending end on the unlicensed spectrum by using physical layer downlink control signaling (DCI); or
  • DCI physical layer downlink control signaling
  • the receiving end device obtains the time domain location information of the transmitting data after the occupied resource is obtained by the signaling end of the unlicensed spectrum by using the physical layer downlink control signaling (DCI) and/or relative to the initial offset value.
  • DCI physical layer downlink control signaling
  • the receiving end device obtains unlicensed spectrum resource information by using a reserved bit state of a carrier indication bit field (CIF) in the DCI; or
  • CIF carrier indication bit field
  • Unlicensed spectrum resource information is obtained by setting dedicated bits in the DCI.
  • the first device on the unlicensed spectrum indicated by the unlicensed spectrum resource information occupies the time domain location information of the resource sending data and/or the first device on the unlicensed spectrum adds the resource after the resource is occupied.
  • the time domain location information of the transmitted data includes a plurality of non-contiguous moments.
  • the embodiment of the present invention further provides a sending end device of an unlicensed carrier occupation method, where the device includes:
  • a signaling sending module configured to send signaling to the receiving end device to indicate unlicensed spectrum resource information
  • a data sending module configured to send data to the receiving end device or stop sending data according to the signaling used to indicate the unlicensed spectrum resource information.
  • the signaling sending module sends, to the receiving end device, signaling for indicating the unlicensed spectrum resource information, including:
  • the signaling sending module sends the unlicensed spectrum resource indication signaling to the receiving end device on the common channel of the agreed carrier through the air interface.
  • the unlicensed spectrum resource information includes one or more of the following:
  • the location device information of the sending end device stops transmitting data in the occupied resource on the unlicensed spectrum
  • the sending device adds the time domain location information of the sent data after the resources are occupied.
  • the signaling sending module sends, to the receiving end device, signaling for indicating the unlicensed spectrum resource information, including:
  • the signaling sending module sends, by using a special occupation signal or signaling, signaling for indicating that the source device of the unlicensed spectrum occupies the time domain information of the resource to transmit data; or
  • the signaling sending module sends, by using a special occupation signal or signaling, signaling for indicating that the transmitting end device newly adds the data time domain location information after the occupied resource is on the unlicensed spectrum.
  • the signaling sending module sends, to the receiving end device, signaling for indicating the unlicensed spectrum resource information, including:
  • the signaling sending module indicates, by using physical layer downlink control signaling (DCI), the time domain location information of the data sent by the sending end device on the unlicensed spectrum; or
  • DCI physical layer downlink control signaling
  • the signaling sending module adds physical layer downlink control signaling (DCI) and/or relative to the initial offset value to indicate that the sending end device newly adds the sending data time domain location information after the occupied resource is on the unlicensed spectrum.
  • DCI physical layer downlink control signaling
  • the signaling sending module sends, to the receiving end device, a time indicating that the signaling of the unlicensed spectrum resource information is M, and the signaling sending module is configured to indicate the unlicensed spectrum resource according to the The time at which the source information is signaled to transmit data satisfies any of the following conditions:
  • N is an integer greater than or equal to zero.
  • the sending by the signaling sending module, the data sent to the receiving end device according to the signaling used to indicate the unlicensed spectrum resource information, including: transmitting the scheduled uplink and downlink data, or transmitting the feedback information or priority High information.
  • the device further includes a determining module, which is configured to:
  • the time domain location information of the data transmission data of the source device on the unlicensed spectrum, the time domain location information of the device on the unlicensed spectrum that stops transmitting data in the occupied resource, and the device on the unlicensed spectrum are occupied.
  • One or more of the domain location information of the sent data is added after the resource.
  • the data sending module is further configured to: send retransmission data to the receiving end device according to the signaling used to indicate the unlicensed spectrum resource information, when the number of retransmissions has reached the maximum number of retransmissions but the data Still not receiving correctly, the data sending module performs one of the following processing:
  • the contention of the unlicensed carrier is resumed until the carrier is contending for transmission or retransmission.
  • the embodiment of the invention further provides a receiving end device of an unlicensed carrier occupation method, the device include:
  • a signaling receiving parsing module configured to receive signaling for indicating unlicensed spectrum resource information, and parse the signaling for indicating unlicensed spectrum resource information to obtain unlicensed spectrum resource usage information
  • the signaling processing module is configured to reserve the unlicensed carrier resource at the corresponding time according to the unlicensed spectrum resource usage information obtained by the signaling receiving parsing module, or start competing for the resource at the time when the resource is released.
  • the unlicensed spectrum resource information includes one or more of the following:
  • the location device information of the sending end device stops transmitting data in the occupied resource on the unlicensed spectrum
  • the sending device adds the time domain location information of the sent data after the resources are occupied.
  • the signaling receiving and parsing module is further configured to: the transmitting device occupies the resource on the unlicensed spectrum.
  • the source device in the unlicensed spectrum on the unlicensed spectrum stops transmitting data in the occupied resource and/or the transmitting device adds the data after the occupied resource on the unlicensed spectrum. Time domain location information.
  • the signaling receiving and parsing module receives, by the sending end, the signaling used by the sending end to indicate the unlicensed spectrum resource information, including:
  • the signaling receiving and parsing module receives the unlicensed spectrum resource indication signaling on an existing physical channel of the authorized carrier through an air interface;
  • the signaling receiving and parsing module receives the unlicensed spectrum resource indication signaling on an unlicensed carrier common channel through an air interface;
  • the signaling receiving and parsing module receives the unlicensed spectrum resource indication signaling on an agreed carrier common channel by using an air interface.
  • the signaling receiving and parsing module receives, by the sending end, the signaling used by the sending end to indicate the unlicensed spectrum resource information, including:
  • the signaling receiving and parsing module receives the dedicated occupation signal or signaling to indicate that the authorization is unauthorized. Signaling on the spectrum: The signaling sender occupies signaling of the time domain location information of the data transmission data; or
  • the signaling receiving and parsing module receives, by using a special occupation signal or signaling, signaling for indicating that the signaling sending end of the unlicensed spectrum newly adds the data time domain location information after the occupied resource is used.
  • the signaling receiving and parsing module receives, by the sending end, the signaling used by the sending end to indicate the unlicensed spectrum resource information, including:
  • the signaling receiving and parsing module obtains time domain location information of the resource transmitting data occupied by the signaling sending end on the unlicensed spectrum through the physical layer downlink control signaling (DCI); or
  • the signaling receiving and parsing module obtains the time domain location information of the transmitting data after the occupied resource is used by the signaling sender on the unlicensed spectrum by using physical layer downlink control signaling (DCI) and/or relative to the initial offset value.
  • DCI physical layer downlink control signaling
  • the technical solution of the embodiment of the present invention provides a method and a device for occupying an unlicensed carrier.
  • the design of a reasonable resource occupation scheme greatly reduces the waste of unauthorized resources, and ensures that the terminal still follows the same timing relationship of the LTE in the same non-
  • the first transmission/retransmission of data on the authorized carrier ensures the quality of service (QoS).
  • QoS quality of service
  • the sharing of the unlicensed carrier time information by the transmitting end is realized, which facilitates the coordinated utilization of the unlicensed carrier in the wireless communication system, and improves the utilization of the unlicensed carrier.
  • pre-determining a plurality of time resources in advance it is possible to avoid the embarrassing situation that if there is a temporary burst of data to be transmitted but does not compete for resources.
  • Embodiment 1 is a flowchart of a method for occupying an unlicensed carrier at a transmitting end according to Embodiment 1 of the present invention
  • FIG. 2 is a flowchart of a method for occupying an unlicensed carrier at a receiving end according to Embodiment 1 of the present invention
  • FIG. 3 is a schematic flowchart of a method for occupying a first device-side unlicensed carrier that competes with an unlicensed resource according to an application example of the present invention
  • FIG. 4 is a schematic flowchart of a method for occupying a second device-side unlicensed carrier according to an application example of the present invention
  • FIG. 5 is a schematic structural diagram of an unlicensed carrier occupation system according to Embodiment 2 of the present invention.
  • This embodiment first provides a method for occupying the first type of unlicensed carrier, which is mainly described from the sending end side. As shown in FIG. 1 , the method mainly includes the following operations:
  • Step 10 The first device sends signaling for indicating unlicensed spectrum resource information to the second device.
  • Step 11 The first device sends data to the second device or stops sending data according to signaling used to indicate the unlicensed spectrum resource information.
  • the first device may send signaling for indicating unlicensed spectrum resource information on the authorized carrier by using an existing physical channel through the air interface.
  • Signaling for indicating unlicensed spectrum resource information may also be transmitted over the unlicensed carrier or the agreed carrier common channel through the air interface.
  • the first device may further perform a common search space bearer by using a PDCCH (Physical Downlink Control Channel) or an EPDCCH (Enhanced Physical Downlink Control Channel), and scramble the foregoing by using a dedicated RNTI (Radio Network Temporary Identity). Signaling indicating unlicensed spectrum resource information.
  • PDCCH Physical Downlink Control Channel
  • EPDCCH Enhanced Physical Downlink Control Channel
  • RNTI Radio Network Temporary Identity
  • the first device When the first device sends data, it includes transmitting and scheduling uplink and downlink data, or transmitting feedback information or information with high priority.
  • the unlicensed spectrum resource information indicated in the signaling used to indicate the unlicensed spectrum resource information includes at least one of the following:
  • the first device on the unlicensed spectrum occupies the time domain information of the resource transmission data (hereinafter, the signaling indicating the information is simply referred to as occupation time signaling);
  • the first device on the unlicensed spectrum stops transmitting data time domain location information in the occupied resources (hereinafter, the signaling indicating the information is simply referred to as occupation termination signaling);
  • the first device on the unlicensed spectrum adds the time domain location information of the transmission data after the resource is occupied (hereinafter, the signaling indicating the information is simply referred to as the occupation update signaling).
  • the foregoing occupation time signaling and/or occupation update signaling may be sent by the first device through a dedicated occupation signal or signaling.
  • the foregoing first device may send the occupancy time signaling by using physical layer downlink control signaling (DCI), or may send the occupation update signaling by using DCI and/or with respect to a starting offset (offset) value.
  • the first device may use the reserved bit status of the carrier indication bit field (CIF) in the DCI to indicate one or several pieces of information of the initial occupation time, occupancy update, and occupancy termination.
  • the first device may also indicate the occupancy time and/or occupancy termination in a bitmap manner.
  • the first device may also set a dedicated bit in the DCI to indicate one or several pieces of information such as an initial occupation time, an occupation update, and an occupation termination.
  • the occupation signaling and/or the occupation update signaling involved in the embodiment are used to indicate a plurality of non-contiguous times, that is, the first device occupied by the unlicensed spectrum indicated by the unlicensed spectrum resource information.
  • the resource transmission time domain location information and/or the first device on the unlicensed spectrum adds new transmission data after the resource is occupied.
  • the time domain location information includes non-contiguous times.
  • the time domain granularity of the occupied time may be a subframe or an OFDM symbol.
  • the first device sends the data moment to meet any of the following conditions:
  • N is an integer greater than or equal to zero.
  • the first device Before the signaling of the unlicensed spectrum resource is sent, the first device needs to determine the occupation information of the unlicensed spectrum resource, including the following operations:
  • Determining a plurality of occupied times and/or occupying update times according to the data HARQ timing relationship and the maximum number of transmissions that is, the time domain location information of the first device occupies the resource transmission data on the unlicensed spectrum and/or the first device on the unlicensed spectrum is occupied Adding time domain location information of the data after the resource; or determining a plurality of occupation time and/or occupation update time according to the result of the negotiation of the operator/device; or determining one of the occupation time, the occupation termination, and the occupation update time according to the measurement result Or several.
  • the first device may further send the occupation update signaling to the other device, including: in a case where the base station continuously transmits the plurality of UL grants (uplink grants) of the multiple UEs in the time domain, indicating the previously scheduled in a bitmap manner An indication of whether the occupancy moment is released.
  • Unlicensed spectrum resource usage information is obtained through the signaling. Then, the second device reserves the unlicensed carrier resource at the corresponding moment according to the unlicensed spectrum resource usage information, or starts competing for the resource at the time when the resource is released. The second device may obtain the unlicensed spectrum resource usage information according to the detected signal or the feedback information, etc., in addition to obtaining the unlicensed spectrum resource usage information from the signaling for indicating the unlicensed spectrum resource information. information.
  • the method for occupying the second unlicensed carrier is also provided, which is mainly described from the receiving end side. As shown in FIG. 2, the method includes:
  • Step 20 The receiving end device receives signaling for indicating unlicensed spectrum resource information sent by the sending end, parses the signaling, and obtains unlicensed spectrum resource usage information therefrom.
  • Step 21 The receiving end device reserves the unlicensed carrier resource at the corresponding time according to the acquired unlicensed spectrum resource usage information, or starts competing for the resource at the time when the resource is released.
  • the signaling used to indicate the unlicensed spectrum resource information in the foregoing method is the same signaling as the signaling described above, so the signaling is not described in detail.
  • the receiving end device is the second device in the foregoing method, and the sending end is the first device in the foregoing method.
  • the receiving end device may listen to the occupation termination signaling and/or the signaling indicating that the update is occupied during the period included in the occupation time signaling; or the receiving end device may be based on the preset process and the reception timing of the signaling.
  • the relationship, in the corresponding subframe, monitors the occupation termination signaling and/or the occupation update signaling.
  • FIG. 3 is taken as an example to illustrate how the foregoing method for occupying the first unlicensed carrier is implemented.
  • the first device After the first device competes for the unlicensed carrier resource and determines the signaling to be sent, the first device sends the signaling in the authorized carrier or the unlicensed carrier or the agreed carrier, where the signaling includes one or more of the following signaling: Species: indicating occupancy time signaling, indicating the termination of the signaling, and indicating the occupation of the update
  • the second device receives the signaling in the authorized carrier or the unlicensed carrier or the agreed carrier, and reserves the unlicensed resource corresponding to the occupied time in the occupied signaling according to the indication of the occupation time signaling and/or the occupation update signaling. And/or according to the signaling of the termination termination, the competition of the unauthorized resources is started at the time of the reservation.
  • the first device and the second device are devices that participate in non-authorized resource competition, and may be, for example, a base station, a terminal, a relay, or other mobile device.
  • the implementation process of the foregoing method includes the following steps:
  • Step 101 The base station determines one or more of signaling, occupation update signaling, and occupation termination signaling of the occupied time that need to be sent;
  • the base station first determines multiple times of initial occupation according to the HARQ timing relationship of the data transmission, or the feedback timing relationship of the data transmission, or the measurement feedback timing relationship.
  • multiple neighboring base stations or UEs of different operators may determine the occupation time of each device by performing an occupation negotiation of an unauthorized resource through an air interface, such as a common channel.
  • the occupied time is a non-contiguous time
  • the occupied time domain granularity is a subframe level or an OFDM symbol level.
  • the subsequent base station determines, according to the demodulation result of the data by the base station or the terminal, and/or the resource scheduling situation of the local cell, the indication that needs to be sent to occupy the update signaling and/or the termination termination signaling.
  • the occupant rate of the unlicensed carrier can be determined according to the usage of the authorized carrier. For example, whether the data is transmitted on the unlicensed carrier is determined according to the load of the current authorized carrier. For example, if the RB occupancy rate of the currently authorized carrier reaches the preset value.
  • the first threshold, or the OI value of the current authorized carrier is greater than a preset second threshold, the base station determines to perform data transmission on the unlicensed carrier, and sends the occupation signaling.
  • the base station needs to send the signaling indicating that the update is occupied and/or the signaling indicating that the occupation is terminated, when the initially used aging time signaling does not match the actual occupied time of the carrier;
  • the determining that the initially transmitted unlicensed carrier occupation time does not match the actual occupation time of the unlicensed carrier includes: the base station transmitting the resource authorization of the unlicensed carrier and the letter indicating the multiple occupation time on the premise of successfully occupying the unlicensed carrier But the base station finds that the unlicensed carrier no longer needs to be occupied at the time when the unlicensed carrier occupies the timing (or before the occupied timing) (including the data already formed).
  • the power is received, or the authorized resource has already met its own needs, or a non-authorized resource that has previously reserved the occupied time is released when a signal that needs to be circumvented is encountered.
  • Step 102 The base station sends one or more signalings of the occupation time signaling, the occupation update signaling, and the occupation termination signaling in the authorized carrier or the unlicensed carrier or the agreed carrier.
  • the agreed carrier is a common channel of an authorized carrier or an unlicensed carrier.
  • the base station may carry the occupied moment of the unlicensed carrier by using a proprietary signal, such as an occupied signal.
  • the base station may indicate, by using the DCI, multiple moments occupying the unlicensed carrier, where the time is used to transmit data or feedback information.
  • the base station determines, according to the scheduling situation and the demodulation result, whether the previously occupied multiple occupied moments are actually used, and if the occupied time is no longer needed, or only needs to occupy some of the moments of the previous multiple moments, then the occupation termination signaling is sent. Release all or part of the time described previously. If the new time needs to be occupied, the occupancy update signaling is sent.
  • the manner in which the base station occupies multiple non-continuous times is: regularly occupied at equal intervals, or occupied according to a pattern, or occupied according to a predefined timing relationship.
  • the manner in which the base station indicates the occupied time is: indicating the occupied time of the subsequent subframe or defining a specific bit state in a bitmap manner to indicate the occupation of the predefined time.
  • the manner in which the base station indicates that the update is occupied is: sending an offset value relative to the time of the initial occupied resource, or still adopting a bitmap manner.
  • the base station sends, by using the physical layer DCI, a device that indicates that the occupied update signaling is an offset value with respect to the initial occupied resource time to compete with other resources, and may be: pre-establishing a mapping pattern of the offset value and the bit state, and passing the bit in the DCI.
  • the state indicates the offset value or uses a bitmap to indicate the offset value.
  • the reserved bit state of the CIF bit field may be utilized to indicate the offset value.
  • the signaling indicating that the base station terminates the occupation is: setting the signaling to an invalid value, or terminating the previous partial occupation time according to a predetermined multiple time bitmap.
  • the base station sends the occupation indication signaling through the physical layer DCI, which may be: the base station uses the reserved bit status indication of the carrier indication bit field (CIF) in the DCI, or sets a dedicated bit in the DCI. Indicate, or use the agreed RNTI to scramble physical layer signaling to indicate unlicensed carrier occupancy.
  • the physical layer DCI may be: the base station uses the reserved bit status indication of the carrier indication bit field (CIF) in the DCI, or sets a dedicated bit in the DCI.
  • CIF carrier indication bit field
  • the value of the occupancy time according to the HARQ timing relationship is divided into two different situations: synchronous HARQ and asynchronous HARQ.
  • the occupied time is at least one of the following: satisfying a multiple of 4, satisfying n+ 4+10*N (N is an integer greater than or equal to 0), satisfies n+7+10*N (N is an integer greater than or equal to 0), satisfies n+6+10*N (N is an integer greater than or equal to 0)
  • the value is M (M is an integer greater than or equal to 1).
  • the base station notifies the unlicensed resources at multiple times by sending the occupation signaling, thereby avoiding delays caused by not robbing resources when the data with high priority is sent.
  • the base station can update the subsequent occupied time according to the data demodulation and the scheduling situation, providing flexibility.
  • the base station notifies the release of the reserved resources of other devices in time by sending the occupation termination signaling, thereby improving resource utilization.
  • the implementation of the second unlicensed carrier occupation method is described below with reference to FIG. 4, and the implementation process includes the following steps:
  • Step 201 The base station that does not compete for the resource receives one or more of the occupation time signaling, the occupation update signaling, and the occupation termination signaling in the agreed carrier.
  • Step 202 The base station reserves the unlicensed resource at the corresponding time according to the occupation indication signaling, starts resource competition according to the occupation termination signaling, and reserves a new occupation time according to the occupation update signaling. .
  • the device that participates in the unlicensed carrier competition acquires one or more of the following signalings through the physical layer DCI in the agreed carrier: the occupation indication signaling, the occupation update signaling, and the termination signaling.
  • the device that preempts the resource in advance such as the base station, first performs an indication of the occupation time according to the synchronization timing relationship of the uplink HARQ, for example, defining 2 bit signaling to indicate four reserved times corresponding to the uplink data. Up to four transmissions, subsequent update or termination of occupancy based on data demodulation, or authorized carrier and scheduling resources.
  • the implementation process of the unlicensed carrier occupation method is as follows:
  • the base station contends to the unlicensed resource at the time of N, and the DL grant is transmitted on the authorized carrier or the unlicensed carrier, and the transmission resource occupation indication signaling 11 is broadcasted on the agreed carrier, that is, the corresponding time N+4, N+12, N+20, N+28, and takes 1ms each time.
  • the other participating devices After receiving the occupation indication information, the other participating devices reserve the four time resources according to the predefined relationship, that is, the four moments will not compete for the unauthorized resources, and only the base station and the subordinate UEs that send the occupation command may use.
  • the UE performs the first data transmission on the reserved resource according to the HARQ timing relationship, and if the base station receives the first time successfully, the UE feeds the ACK to the authorized carrier at the time of N+8 and simultaneously correspondingly
  • the reserved resource indication signaling is set to be invalid or empty, that is, other base stations know that the base station no longer uses the unlicensed resource, so that N+12, N+20, and N+28 can be released for use by other base stations.
  • the base station does not receive the first time, the UE needs to retransmit.
  • the NACK is sent, broadcasting a 10 indicates that it may need to be occupied three times.
  • the corresponding time is N+12, N+20, N+28, and other base stations are required to continue. Leave this resource.
  • the UE again uses the reserved carrier to transmit the first retransmission data. If the base station is de-paired, the ACK is sent, and the corresponding reserved resource indication signaling is set to be invalid or empty, that is, the other base station is notified. The previously reserved N+20, N+28 is released at any time.
  • the used signaling signaling 01 is updated to notify other base stations that the N+20 and N+28 times need to be reserved. resource of.
  • the UE still uses the unlicensed carrier to send the second retransmission data. Similarly, if the base station is de-paired, the ACK is fed back and the corresponding reserved resource indication signaling is set to be invalid or empty, and the other is notified. The base station releases the reserved N+28 time resources.
  • the NACK is fed back while broadcasting 00, telling other base stations to reserve once.
  • the occupied time should also include the N+8, N+16, and N+24 feedback moments to ensure that the uplink HARQ is performed according to the original timing relationship.
  • the other device obtains the subsequent time reserved according to the timing relationship through the feedback ACK/NACK information, that is, uses the ACK/NACK information to indicate the use of the subsequent resources, and the ACK represents The occupied resources are no longer used, released, and the NACK represents continuing to reserve resources at predefined times.
  • the other device only needs to decompose the reserved resource on the agreed carrier according to one or more of the HARQ feedback timing moments, such as N+8, N+16, and N+24.
  • the UE transmits the uplink data on the corresponding reserved resource according to the original timing relationship and the ACK/NACK feedback information.
  • the occupant time is performed according to the HARQ timing relationship, so that the UE performs data first transmission and retransmission according to the original uplink HARQ synchronization timing relationship, and does not receive the influence of the unlicensed carrier resource competition mechanism, thereby ensuring QoS.
  • the TDD system is taken as an example to describe the transmission of the occupied update signaling in detail.
  • the uplink and downlink subframes are configured to be 0.
  • the timing of the uplink HARQ according to the existing LTE indicates that the time at which the base station needs to occupy the unlicensed carrier may be: N+4, N+14 One or more of N+24, N+34.
  • the base station receives correctly for the data packet transmitted at time N+4.
  • the existing authorized carrier resources may not be sufficient.
  • the RB occupancy rate of the current authorized carrier reaches a preset first threshold, or the OI value of the current authorized carrier is greater than a preset second threshold.
  • the base station determines to perform data transmission on the unlicensed carrier, and the base station can send an occupation command of the unlicensed carrier.
  • the other stations are notified that the unlicensed carrier resources need to continue to be occupied, and the occupied update time can be notified through relevant signaling.
  • the base station wants to use this carrier to transmit downlink data, and the TDD uplink and downlink subframe configuration is changed to configuration 1, the time required to occupy is N+5, N+6, N+9, and N+10.
  • This signaling can be reported to other devices through the bitmap of 110011, or it can be expressed by the way of occupying the offset at the previous time.
  • the base station notifies the offset of the new scheduling resource location relative to the starting scheduling resource location by using the physical layer DCI, for example, using the reserved bit state of the CIF bit field in the DCI to indicate the offset.
  • the CIF bit domain may be predefined.
  • the mapping between the bit state and the offset value is reserved, for example, the state 101 is reserved, the offset value is 4, the offset value is 110, and the offset value is 12.
  • This information can also be passed through a dedicated RNTI
  • the scrambling is carried on the DCI.
  • This information is sent over the authorized carrier or unlicensed carrier or the agreed carrier and broadcast to other nearby sites.
  • the base station can carry the occupied time of the unlicensed carrier through a proprietary signal, such as an occupied signal.
  • the base station can transmit through physical layer downlink control signaling (DCI).
  • DCI physical layer downlink control signaling
  • the signaling is carried over the PDCCH or EPDCCH common search space and is scrambled by a dedicated agreed RNTI.
  • the signaling is carried using a reserved bit state of a carrier indication bit field (CIF) in the DCI. Or define a special bit field to indicate.
  • CIF carrier indication bit field
  • the other contending device receives the relevant DCI in the authorized carrier at the appointed time.
  • the other contending device monitors whether the DCI transmission occurs during the period from the time when the resource is authorized to the transmission time determined by the original occupation timing; or
  • the other competing device monitors whether there is the DCI transmission in the corresponding subframe based on the pre-defined process and the pattern relationship of the DCI receiving time, and optionally uses the CIF bit field reservation in the DCI according to the signaling parsed in the DCI.
  • the bit state, or using the dedicated bit set in the DCI to know the original occupation termination, and to utilize the different reserved bit states of the CIF bit field, or to obtain the offset relative to the initial occupied resource position by using the predefined bitmap mapping relationship in the DCI.
  • other competing devices do not transmit data at the initial occupied resource location, and transmit data at the new occupied resource location obtained by the offset value.
  • the present embodiment is mainly used to describe that if a base station that has preempted an unauthorized resource transmits an emergency downlink service, even if the data scheduling on the unlicensed carrier has ended, the user may choose not to release the predetermined resource, and use the resource. To send downstream data, reducing the delay.
  • the base station can also continue to schedule other uplink users with predetermined unlicensed resources to transmit the required data.
  • the FDD system is taken as an example to illustrate the process in which the base station uses the pre-empted unlicensed carrier for downlink data transmission.
  • the base station preempts the unlicensed carrier resource, and sends the occupancy signaling to reserve the resource.
  • the bitmap 1000101 indicates that the occupied time is N, N+4, N+6, that is, occupied according to a pattern, which is assumed here.
  • the carrier or the agreed carrier is transmitted and broadcast to other surrounding stations as well as the UE.
  • the base station sends downlink data at the occupied time, and the UE receives the downlink data at the corresponding time according to the occupied information.
  • the delay may be sent to avoid the base station preempting the corresponding unlicensed carrier resources at the time of the feedback timing, and an update command may be sent to ensure that the downlink carrier can be sent on the unlicensed carrier. Corresponding important information.
  • the base station sends a new downlink grant and downlink data on the predetermined unlicensed carrier.
  • the terminal needs to downlink to the received N+4 moment at time N+8.
  • the data is ACK/NACK feedback.
  • the base station may send an occupation update signaling to ensure that the unlicensed carrier is available at the time of N+8.
  • This signaling may be in the form of a bitmap, represented by 0001, or an offset value of 10 at the previous N+6 time to indicate that the occupation delay is 2 times.
  • the occupant update information base station may send to other devices participating in the unlicensed resource competition on the authorized carrier or the unlicensed carrier or the agreed carrier common channel through the air interface or using the existing physical channel.
  • the base station can carry the occupied time of the unlicensed carrier by using a proprietary signal, such as an occupied signal.
  • the base station can also transmit through physical layer downlink control signaling (DCI).
  • DCI physical layer downlink control signaling
  • the signaling is carried over the PDCCH or EPDCCH common search space and is scrambled by a dedicated agreed RNTI.
  • the signaling is carried using a reserved bit state of a carrier indication bit field (CIF) in the DCI.
  • CIF carrier indication bit field
  • This embodiment is to explain that the predetermined unlicensed carrier resources can also transmit some urgent related information of the control class other than the data, thereby avoiding the transmission delay caused by temporarily preempting the resources.
  • the occupancy termination may be terminated by one or more predetermined moments of occupancy. It is also possible to terminate the occupation of a predetermined time corresponding to one or more UL/DL grants.
  • a device that competes for resources (assumed to be a base station), previously scheduled N+7, N+17, N+27, N+37 multiple times for four transmissions of uplink HARQ corresponding to a certain UL grant of TDD.
  • the data is received correctly after the first transmission, and the base station does not have other data to continue transmission on the unlicensed carrier at this time, and the base station can send an occupation termination signaling to other devices.
  • This signaling can be represented by an invalid value or by a zero value.
  • the base station can be sent by physical layer downlink control signaling (DCI).
  • DCI physical layer downlink control signaling
  • the signaling is carried over the PDCCH or EPDCCH common search space and is scrambled by a dedicated agreed RNTI.
  • the signaling is carried using a reserved bit state of a carrier indication bit field (CIF) in the DCI.
  • CIF carrier indication bit field
  • the other competing devices receive the relevant termination information in the authorized carrier or the unlicensed carrier or the agreed carrier at the appointed moment.
  • the other contending device monitors whether the DCI transmission is performed during the period of acquiring the resource authorization time to the transmission time determined by the original occupation timing; or the other contention device is based on the predefined process and the DCI receiving time Relationship, whether the DCI transmission is detected in the corresponding subframe, according to the signaling parsed in the DCI, optionally, using the reserved bit state of the CIF bit field in the DCI, or using the dedicated bit set in the DCI to learn the original Termination of occupation,
  • the processing of the received DCI signaling by the other contending devices includes at least one of the following:
  • all the subsequent UL grants corresponding to the other contending devices are terminated.
  • the other contending devices receive the DCI received at the time of n+k+1, and then the subframe n and the time n.
  • the two UL grants continuously sent at time +1 are all terminated;
  • the other contending device determines that the UL grant of the corresponding process is terminated based on the bit indication in the DCI;
  • the other competing devices receive the DCI at the corresponding time based on the pre-defined process and the receiving time pattern relationship of the DCI, and determine whether the UL grant of the corresponding process is terminated, for example, for the process of pre-defining the UL grant in the subframe n, other Whether the competing device receives an indication at time n+k+1
  • the DCI in which the process is invalid for a process that is predefined to send a UL grant in subframe n+1, other competing devices receive a DCI indicating that the process is invalid at time n+k+2.
  • the plurality of non-contiguous moments occupied by the base station may be used only for uplink data scheduling, or all downlink data scheduling, and may also be used in the downlink and cross-over, that is, the TDD mode.
  • the base station can also be used at other times. For example, assume that the occupied time of the indication is N, N+3, N+5, and other times, such as N+1, N+2, and N+4, the base station and the subordinate UEs can be directly used.
  • resources may be occupied according to a predefined synchronization timing relationship, or may be occupied according to a certain pattern. In both cases, it can be determined comprehensively based on the existing resource situation and the situation of the scheduling user.
  • the occupied unlicensed carrier can also be preferentially used to transmit some important information, such as ACK/NACK, DCI, PSS/SSS or VoIP, and other high priority service types.
  • the following describes the determination of the resources occupied by unauthorized resources.
  • the time at which a base station that preempts an unlicensed resource occupies resources can be determined in two ways:
  • Manner 1 Determine according to their own needs, such as data retransmission or feedback timing or authorization resources and scheduling users;
  • Method 2 Determine by negotiation with other competing devices.
  • a plurality of neighboring base stations or UEs of different operators may determine the occupation time of each device by performing an occupation negotiation of an unauthorized resource through an air interface, such as a common channel.
  • each device takes up an integer multiple of a different natural number.
  • the device that competes to the resource will notify the other device and the UE of the local cell through the air interface at a specific moment occupied by the device.
  • the base station can perform the following candidate processing:
  • Mode 3 Go to the new unlicensed carrier to continue the transmission.
  • the new unlicensed carrier is the carrier that the base station contends, and one that is not used can be selected from the set of available unlicensed carriers.
  • Manner 4 Re-competition of the unlicensed carrier is resumed until the carrier is contending to continue transmission or re-transmitting from RV0. That is, asynchronous mode retransmission.
  • the system includes: a first device (also referred to as a sender device) 50 that preempts unauthorized resources and all other components that compete for non-authorized resources. a device (referred to as a receiving device) 60; wherein
  • the sending end device 50 preempting the unlicensed resource is configured to send the signaling in the authorized carrier or the unlicensed carrier or the agreed carrier after determining the signaling that needs to be sent, where the signaling includes one or more of the following: Species: indicating occupation time signaling, indicating occupation of termination signaling, indicating signaling to occupy the update;
  • the other receiving device 60 that does not compete for resources is configured to receive the signaling in an authorized carrier or an unlicensed carrier or an agreed carrier, and perform one or more of the following operations according to the signaling content:
  • the received signaling is signaling indicating the occupied time, and the corresponding unlicensed carrier resource moment is reserved;
  • the received signaling is signaling indicating that the occupation is terminated, and the resource competition starts at the time of the released reserved resource;
  • the received signaling is signaling indicating that the update is occupied, and the corresponding new unlicensed resource moment is reserved.
  • the sender device 50 of the method for occupying the unlicensed carrier includes:
  • the signaling sending module 501 is configured to send, to the receiving end device, signaling for indicating unlicensed spectrum resource information
  • the data sending module 502 is configured to send data to the receiving end device or stop transmitting data according to the signaling for indicating the unlicensed spectrum resource information.
  • the foregoing sending end device may further include a determining module 503, configured to determine signaling that needs to be sent (including at least one of the following signaling: signaling indicating occupation, indicating signaling to terminate termination, indicating signaling to occupy update) And notify the signaling module.
  • a determining module 503 configured to determine signaling that needs to be sent (including at least one of the following signaling: signaling indicating occupation, indicating signaling to terminate termination, indicating signaling to occupy update) And notify the signaling module.
  • the foregoing sending device 50 can implement the first unlicensed carrier occupation method provided in the foregoing Embodiment 1, and other detailed descriptions of the transmitting device 50 can be referred to the corresponding content in Embodiment 1 above. This will not be repeated here.
  • the receiving end device 60 of the unlicensed carrier occupation method includes a signaling receiving and parsing module 601, and a signaling processing module 602.
  • the signaling receiving and parsing module 601 is configured to receive signaling for indicating unlicensed spectrum resource information, and parse the signaling for indicating unlicensed spectrum resource information to obtain unlicensed spectrum resource usage information;
  • the signaling processing module 602 is configured to determine the reserved unlicensed carrier resource time according to the unlicensed spectrum resource usage information obtained by the signaling receiving parsing module, or start resource competition at the originally reserved resource moment.
  • the foregoing receiving device 60 can implement the second unlicensed carrier occupation method provided in the foregoing Embodiment 1, and other detailed descriptions of the receiving device 60 can be referred to the corresponding content in Embodiment 1 above. This will not be repeated here.
  • an unlicensed carrier occupation scheme provided by the technical solution of the embodiment of the present invention achieves the purpose of accurately occupying unlicensed carrier resources. And transmitting the occupation signaling by using the authorized carrier or the unlicensed carrier, so that the time signaling of the unlicensed carrier is occupied by the transmitting end.
  • the sharing solves the problem of how the devices in the related art notify each other about the occupation of the unlicensed carrier, facilitates the coordinated utilization of the unlicensed carrier in the wireless communication system, and improves the utilization of the unlicensed carrier.
  • the device of the predetermined resource can be continuously updated according to the resource and the service condition, thereby avoiding the transmission delay problem when the service with high priority or the control information needs to be transmitted but does not compete with the resource.
  • the embodiment of the present invention provides a method and a device for occupying an unlicensed carrier.
  • the designed resource occupation scheme greatly reduces the waste of unauthorized resources, and ensures that the terminal still uses the same unlicensed carrier according to the original timing relationship of LTE.
  • the data is first transmitted/retransmitted to ensure quality of service (QoS).

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Abstract

L'invention concerne un procédé et un dispositif pour occuper une porteuse non autorisée. Le procédé comprend les opérations suivantes : un premier dispositif envoie, à un second dispositif, une signalisation utilisée pour indiquer des informations concernant une ressource de spectre non autorisée; et le premier dispositif envoie des données au second dispositif ou arrête d'envoyer des données selon la signalisation utilisée pour indiquer les informations concernant la ressource de spectre non autorisée.
PCT/CN2015/080993 2014-11-21 2015-06-08 Procédé et dispositif pour occuper une porteuse non autorisée WO2016078396A1 (fr)

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