WO2016154907A1 - Procédé, appareil et système de transmission de données - Google Patents

Procédé, appareil et système de transmission de données Download PDF

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Publication number
WO2016154907A1
WO2016154907A1 PCT/CN2015/075542 CN2015075542W WO2016154907A1 WO 2016154907 A1 WO2016154907 A1 WO 2016154907A1 CN 2015075542 W CN2015075542 W CN 2015075542W WO 2016154907 A1 WO2016154907 A1 WO 2016154907A1
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Prior art keywords
shared channel
time
idle state
information
scheduling
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PCT/CN2015/075542
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English (en)
Chinese (zh)
Inventor
闫志宇
郑娟
李强
马莎
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华为技术有限公司
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Priority to PCT/CN2015/075542 priority Critical patent/WO2016154907A1/fr
Priority to CN201580078099.XA priority patent/CN107432004A/zh
Publication of WO2016154907A1 publication Critical patent/WO2016154907A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation

Definitions

  • Embodiments of the present invention relate to communication technologies, and in particular, to a method, an apparatus, and a system for transmitting data.
  • Spectrum resources are the basis of wireless communications. According to the latest international spectrum white paper released by the Federal Communications Commission (FCC), unlicensed spectrum resources are more than licensed spectrum resources. Since there is currently no constraint on the use of wireless communication systems and operators on the unlicensed spectrum, there are multiple communication systems in which multiple operators want to occupy the same channel. According to the current regulations of ETSI EN 301893, wireless communication equipment is required to follow the ETSI EN 301 893 standard issued by the European Telecommunications Standards Institute (ETSI) when it is used on the unlicensed spectrum (Listen Before) Talk, referred to as: LBT) rules.
  • ETSI EN 301 893 issued by the European Telecommunications Standards Institute (ETSI) when it is used on the unlicensed spectrum (Listen Before) Talk, referred to as: LBT) rules.
  • the LBT rule is that the wireless communication device first listens to whether the channel of the unlicensed spectrum is idle before using the unlicensed spectrum, and can transmit data using the channel of the unlicensed spectrum if the channel is idle.
  • the wireless communication device can perform a Clear Channel Assessment (CCA) by energy detection.
  • CCA Clear Channel Assessment
  • the link sent from the Evolved Node B (eNodeB) to the user equipment (User Equipment, UE for short) in the Long Term Evolution (LTE) system is called downlink, and is sent from the UE to the eNodeB.
  • the link is called the uplink.
  • the data sent by the eNodeB to the UE is carried by the physical downlink shared channel (PDSCH) at the physical layer, and the data sent by the UE to the eNodeB is physically uplink shared channel (PUSCH) at the physical layer. Hosted.
  • PDSCH physical downlink shared channel
  • PUSCH physically uplink shared channel
  • the eNodeB indicates the spectrum resource and the transmission used on the PDSCH and/or the PUSCH to the UE through a physical downlink control channel (PDCCH) or an enhanced physical downlink control channel (ePDCCH). the way. It can be seen that the spectrum resources used by any uplink transmission of the UE are pre-allocated by the eNodeB.
  • PDCH physical downlink control channel
  • ePDCCH enhanced physical downlink control channel
  • the eNodeB cannot obtain an opportunity to transmit uplink data at an expected time by monitoring the channel of the unlicensed spectrum.
  • the UE determines whether the channel transmission data of the unlicensed spectrum can be occupied depends on whether the channel of the unlicensed spectrum is idle or not. Only when the channel determining the unlicensed spectrum is idle, the channel can transmit the data.
  • the UE evaluates the channel transmission data that cannot occupy the unlicensed spectrum after the preset start evaluation time, the UE needs to perform the “extended CCA” detection to extend the detection time length of the CCA to N times the length of one CCA.
  • the UE If the eNodeB performs uplink scheduling on the UE on the unlicensed spectrum, the UE is expected to use the pre-allocated spectrum resource to transmit the uplink data in the subframe n. However, when the UE actually sends the uplink data in the subframe n, the detected resource is occupied and cannot be used. The indication of the eNodeB completes the intended operation. In this way, the eNodeB's uplink scheduling for the UE becomes an invalid resource allocation, and the eNodeB does not allocate the resources that have been allocated to the UE to other UEs at the same time, and the UE cannot send the uplink data according to the scheduling indication because the uplink channel is not occupied. This causes waste of allocated spectrum resources, resulting in reduced transmission efficiency of the communication system.
  • Embodiments of the present invention provide a method, device, and system for transmitting data, to avoid waste of pre-allocated resources, and improve transmission efficiency of the communication system.
  • an embodiment of the present invention provides a method for transmitting data, including:
  • the first device determines a start time for evaluating whether the shared channel is in an idle state
  • the first device determines whether to transmit data on the shared channel according to an evaluation result of evaluating whether the shared channel is in an idle state.
  • the method further includes:
  • the first device receives at least one of broadcast information, scheduling indication information, and scheduling restriction information sent by the second device.
  • the broadcast information includes time information that the shared channel is released
  • the first device determines a start time for evaluating whether the shared channel is in an idle state, and includes:
  • the first device determines a time indicated by the time information that the shared channel is released in the broadcast information as a start time for evaluating whether the shared channel is in an idle state.
  • the scheduling indication information includes: sending, by the second device, the uplink data that is allocated by the second device Resource scheduling information;
  • the first device determines a start time for evaluating whether the shared channel is in an idle state, and includes:
  • Determining, by the first device, the uplink corresponding to the sending according to a timing relationship between a time when the resource scheduling indication information of the uplink data is received and a time of sending the uplink data corresponding to the scheduling indication information of the uplink data The time of the data, and determining the time of the preset evaluation time in advance of the time of transmitting the corresponding uplink data as the start time for evaluating whether the shared channel is in an idle state.
  • the scheduling indication information includes scheduling information that the second device sends downlink data.
  • the first device determines a start time for evaluating whether the shared channel is in an idle state, and includes:
  • the scheduling restriction information includes pre-configured time range information of the second device occupying the shared channel
  • the first device determines a start time for evaluating whether the shared channel is in an idle state, and includes:
  • the determining, by the first device, the start time for determining whether the shared channel is in an idle state includes:
  • the first device determines a time preset with the second device as a start time for evaluating whether the shared channel is in an idle state.
  • the duration of the preset evaluation time includes at least The length of a preset time period.
  • the first device from the start time Begin to evaluate whether the shared channel is in an idle state within a preset evaluation time including:
  • the first device evaluates that the energy value of the shared channel is higher than a preset power determination threshold in the preset evaluation time, determining that the shared channel is not in an idle state;
  • the first device determines, according to an evaluation result that the shared channel is in an idle state, Transfer data on the shared channel, including:
  • the first device evaluates to determine that the shared channel is in the idle state at a time when the preset evaluation time ends, and then transmits data on the shared channel;
  • the first device determines that the shared channel is not in an idle state at the time when the preset evaluation time ends, and does not transmit data on the shared message.
  • an embodiment of the present invention provides a method for transmitting data, including:
  • the second device determines indication information, where the indication information is used to indicate a start time of the first device to evaluate whether the shared channel is in an idle state before transmitting the data;
  • the second device and the first device transmit data on the shared channel, and the start time of the transmission data is after the first device evaluates that the shared channel is in an idle state.
  • the indication information includes a start for indicating whether the first device evaluates whether the shared channel is in an idle state before transmitting data At least one of broadcast information, scheduling indication information, and scheduling restriction information of time.
  • an embodiment of the present invention provides a communications device, including:
  • a determining module configured to determine a start time for evaluating whether the shared channel is in an idle state
  • An evaluation module configured to, according to the starting time, evaluate whether the shared channel is in an idle state within a preset evaluation time
  • a communication module configured to determine whether to transmit data on the shared channel according to an evaluation result of evaluating whether the shared channel is in an idle state.
  • the communications module is further configured to receive, by the second device, at least one of broadcast information, scheduling indication information, and scheduling restriction information. .
  • the broadcast information includes time information that the shared channel is released
  • the determining module is specifically configured to determine a time indicated by the time information that the shared channel is released in the broadcast information as a start time for evaluating whether the shared channel is in an idle state.
  • the scheduling indication information includes sending uplink data that is allocated by the second device to the first device Resource scheduling information;
  • the determining module is specifically configured to determine, according to a timing relationship between a time when the resource scheduling indication information of the uplink data is received and a time of sending the uplink data corresponding to the scheduling indication information of the uplink data, Corresponding time of the uplink data, and determining a time earlier than the time for transmitting the corresponding uplink data by the preset evaluation time as a start time for evaluating whether the shared channel is in an idle state.
  • the scheduling indication information includes scheduling information that the second device sends downlink data.
  • the determining module is specifically configured to determine, when the shared channel indicated by the scheduling information of the downlink data is released, a start time for evaluating whether the shared channel is in an idle state.
  • the scheduling restriction information includes pre-configured time range information of the second device occupying the shared channel
  • the determining module is specifically configured to determine, in the scheduling restriction information, an end time indicated by the time range information of the second device occupying the shared channel, to determine whether the shared channel is idle. The start time of the state.
  • the determining module is specifically configured to determine a time preset with the second device to determine whether the shared channel is in an idle state. Start time.
  • the duration of the preset evaluation time is included in the third aspect of the third aspect, The length of at least one preset time period.
  • the evaluation module is specifically used for And determining, in the preset evaluation time, that the energy value of the shared channel is higher than a preset power determination threshold, determining that the shared channel is not in an idle state; and if the shared channel is evaluated in the preset evaluation time If the energy value is lower than or equal to the preset power determination threshold, it is determined that the shared channel is in an idle state.
  • the communications module is configured to determine, at a time when the preset evaluation time ends If the shared channel is in the idle state, data is transmitted on the shared channel; or, when the preset channel is determined to be not in an idle state, the data is not transmitted on the shared message. .
  • an embodiment of the present invention provides a communications device, including:
  • a determining module configured to determine indication information, where the indication information is used to indicate a start time of the first device to evaluate whether the shared channel is in an idle state before transmitting the data;
  • a communication module configured to transmit data on the shared channel with the first device, where a start time of the transmission data is after the first device evaluates that the shared channel is in an idle state.
  • the communication module is further configured to send the indication information to the at least one first device, where the indication information includes Determining at least one of broadcast information, scheduling indication information, and scheduling restriction information of a start time for evaluating whether the shared channel is in an idle state before transmitting data.
  • the determining module is further configured to pre-set the first device indicated by the indication information to the shared channel Whether it is in the idle state and the start time of the evaluation.
  • an embodiment of the present invention provides a communications device, including:
  • a processor configured to determine a start time for evaluating whether the shared channel is in an idle state; and evaluating, from the start time, whether the shared channel is in an idle state within a preset evaluation time;
  • a transceiver configured to determine whether to transmit data on the shared channel according to an evaluation result of evaluating whether the shared channel is in an idle state.
  • the transceiver is further configured to receive at least one of broadcast information, scheduling indication information, and scheduling restriction information that is sent by the second device.
  • the broadcast information includes time information that the shared channel is released
  • the processor is specifically configured to determine a time indicated by the time information that the shared channel is released in the broadcast information as a start time for evaluating whether the shared channel is in an idle state.
  • the scheduling indication information includes the sending uplink data that is allocated by the second device to the first device Resource scheduling information
  • the processor is specifically configured to determine the sending according to a timing relationship between a time when the resource scheduling indication information of the uplink data is received and a time of sending the uplink data corresponding to the scheduling indication information of the uplink data. Corresponding time of the uplink data, and determining a time earlier than the time for transmitting the corresponding uplink data by the preset evaluation time as a start time for evaluating whether the shared channel is in an idle state.
  • the scheduling indication information includes scheduling information that the second device sends downlink data.
  • the processor is specifically configured to determine, when the shared channel indicated by the scheduling information of the downlink data is released, a start time for evaluating whether the shared channel is in an idle state.
  • the scheduling restriction information includes pre-configured time range information of the second device occupying the shared channel
  • the processor is specifically configured to determine, in the scheduling restriction information, an end time indicated by the time range information of the second device occupying the shared channel, to determine whether the shared channel is idle. The start time of the state.
  • the processor is configured to determine a time preset with the second device to determine whether the shared channel is in an idle state. time.
  • the duration of the preset evaluation time includes at least one The length of the preset time period.
  • the transceiver is configured to: determine, when the preset evaluation time ends, determine the sharing If the channel is in the idle state, data is transmitted on the shared channel; or, when the preset channel is determined to be not in an idle state, the data is not transmitted on the shared message.
  • an embodiment of the present invention provides a communications device, including:
  • a processor configured to determine indication information, where the indication information is used to indicate a start time of the first device to evaluate whether the shared channel is in an idle state before transmitting the data;
  • a transceiver configured to transmit data on the shared channel with the first device, where a start time of the data is after the first device evaluates that the shared channel is in an idle state.
  • the transceiver is further configured to send the indication information to the at least one first device, where the indication information includes Determining at least one of broadcast information, scheduling indication information, and scheduling restriction information of a start time for evaluating whether the shared channel is in an idle state before transmitting data.
  • the processor is further configured to preset, in advance, whether the first device indicated by the indication information is in an idle state The start time for the evaluation.
  • an embodiment of the present invention provides a communication system, including: a first device and a second device, where the first device adopts any one of the first to the ninth aspects of the third aspect, the third aspect A communication device as described in a possible implementation manner, wherein the second device adopts the communication device according to any one of the first aspect to the second aspect of the fourth aspect.
  • an embodiment of the present invention provides a communication system, including: a first device and a second device, where the first device adopts any one of the first to the ninth aspects of the fifth aspect, the fifth aspect, A communication device as described in a possible implementation manner, wherein the second device is the communication device according to any one of the first to the second possible aspects of the sixth aspect.
  • the method, device, and system for transmitting data in the embodiment of the present invention determine the start time of evaluating whether the shared channel is in an idle state, and improve the probability that the first device detects that the shared channel is in an idle state within a preset evaluation time, so that the first The device can effectively occupy the shared channel and transmit data on the shared channel, avoiding waste of pre-allocated resources, and improving transmission efficiency of the communication system.
  • FIG. 1 is a flow chart of one embodiment of a method of transmitting data according to the present invention
  • FIG. 2 is a flow chart of another embodiment of a method of transmitting data according to the present invention.
  • 3 is a timing diagram showing data transmission by the first device and the second device
  • FIG. 5 is a third timing diagram of data transmission by the first device and the second device
  • FIG. 6 is a schematic structural diagram of an embodiment of a communication system according to the present invention.
  • FIG. 8 is a schematic structural diagram of an embodiment of a communication device according to the present invention.
  • FIG. 9 is a schematic structural diagram of another embodiment of a communication device according to the present invention.
  • FIG. 10 is a schematic structural diagram of a third embodiment of a communication device according to the present invention.
  • FIG. 11 is a schematic structural diagram of a fourth embodiment of a communication device according to the present invention.
  • FIG. 12 is a schematic structural diagram of another embodiment of a communication system according to the present invention.
  • FIG. 1 is a flowchart of an embodiment of a method for transmitting data according to the present invention. As shown in FIG. 1, the method in this embodiment may include:
  • Step 101 The first device determines a start time for evaluating whether the shared channel is in an idle state.
  • the first device in the present invention may be a UE, and the second device eNodeB communicates based on the unlicensed spectrum, and the unlicensed spectrum is the shared channel.
  • a macro base station (Macro eNodeB) and a micro base station (Pico eNodeB) in the communication system may also be used as the first device and the second device in the present invention, and the macro base station and the micro base station may alternately serve as the first device and the first device.
  • devices in the communication system that use shared channel communication may serve as the first device or the second device.
  • the first device needs to communicate through the shared channel, and the LBT rule needs to be used to detect whether the shared channel is idle.
  • the first device determines whether the shared channel is idle: if the first device detects that the shared channel is idle from the start time of evaluating the idle state of the shared channel to the end time of the preset evaluation time, the shared channel may be determined as An idle state and occupying the shared channel to transmit data; if the first device detects that the shared channel is occupied from the start time of evaluating the idle state of the shared channel to the end time of the preset evaluation time, determining that the shared channel cannot be occupied currently The shared channel transmits data. At this time, the first device needs to continue to evaluate whether the shared channel is idle, starting from the end time of the preset evaluation time.
  • the resource used by the UE to transmit data is pre-allocated by the eNodeB, and the frequency band and time of the resource are determined. If the UE uses the resource to send data, it starts to evaluate the idle state of the shared channel. It is possible that the shared channel is occupied and the resource cannot be used to transmit data according to the scheduling indication at a determined time.
  • the first device in the embodiment first determines whether the shared channel is in an idle state.
  • Starting time the starting time may be according to the first
  • the time information that the shared channel acquired by the device may be released is determined, so that the first device may determine the first time after the shared channel is released as the start time for evaluating whether the shared channel is in an idle state; the start time may also be
  • the time information of the data to be transmitted by the first device is determined according to the time information of the data to be transmitted by the first device, so that the first device can determine a certain time before the time when the data is to be transmitted as the start time for evaluating whether the shared channel is in an idle state.
  • Step 102 The first device, according to the starting time, evaluates whether the shared channel is in an idle state within a preset evaluation time.
  • the first device determines from time when it starts to evaluate whether the shared channel is in an idle state, and starts to perform evaluation when the time arrives, and the first device can continuously detect whether the shared channel is in an idle state within a preset evaluation time, as long as The state of the shared channel is idle for a period of time, and the shared channel is determined to be in an idle state, and the shared channel is used to transmit data.
  • the preset evaluation time may be a fixed duration long pre-configured by the upper layer of the communication system, or may be a fixed duration agreed by the first device and the second device before the communication, and the first device and the second device respectively recognize that the time is required. Determine if the shared channel is idle during the duration.
  • the first device Since the first device starts to evaluate whether the shared channel is in an idle state as soon as the shared channel is released, or starts to evaluate whether the shared channel is in an idle state before the time when the data is to be transmitted, the first device detects in the preset evaluation time. It is highly probable that the shared channel is in an idle state, and the first device can transmit data using the pre-allocated resources at the expected time once the shared channel is occupied.
  • Step 103 The first device determines whether to transmit data on the shared channel according to an evaluation result of evaluating whether the shared channel is in an idle state.
  • the first device has evaluated whether the shared channel is in an idle state, so according to the evaluation result, the first device can determine whether data can be transmitted on the shared message.
  • the first device improves the probability that the first device detects that the shared channel is in an idle state in the preset evaluation time by determining the start time of the shared channel in the idle state, so that the first device can effectively occupy the first device. Sharing channels and transmitting data on the shared channel avoids waste of pre-allocated resources and improves transmission efficiency of the communication system.
  • the method further includes: receiving, by the first device, broadcast information, scheduling indication information, and scheduling sent by the second device. Limit at least one item of information.
  • the first device may receive broadcast information, scheduling indication information, and scheduling. At least one of the restriction information determines a start time for evaluating whether the shared channel is in an idle state.
  • the broadcast information includes time information that the shared channel is released.
  • the first device determines that the shared channel is in an idle state.
  • the specific implementation method may be: A device determines a time indicated by the time information in which the shared channel is released in the broadcast information as a start time for evaluating whether the shared channel is in an idle state.
  • the time information of the shared channel that is included in the broadcast information sent by the second device may be time information of the second device itself releasing the shared channel, or may be other than the first device and the second device in the communication system.
  • the device releases the time information of the shared channel.
  • the second device broadcasts the time information that the shared channel is released by using the broadcast information.
  • the first device may determine, as the evaluation shared channel, the time indicated by the time information that the shared channel is released in the broadcast information. Whether it is in the idle start time.
  • the scheduling indication information includes resource scheduling information that is sent by the second device to the first device to send uplink data.
  • the first device determines whether to determine whether the shared channel is in an idle state.
  • the specific implementation method may be: a timing between the time when the first device receives the resource scheduling indication information of the uplink data and the time of sending the uplink data corresponding to the scheduling indication information of the uplink data. And determining, by the relationship, the time for transmitting the corresponding uplink data, and determining, by the time that the time of transmitting the corresponding uplink data is earlier than the preset evaluation time, a start time for evaluating whether the shared channel is in an idle state.
  • the second device may indicate, by using the PDCCH or the ePDCCH, the spectrum resource and the transmission mode used by the second device to transmit data on the shared channel, where the second device sends the uplink scheduling data to the first device.
  • the first device receives the resource resource scheduling information of the uplink data after receiving the resource resource scheduling information of the uplink data according to the timing relationship between the resource scheduling information of the uplink data in the communication system and the scheduling information of the uplink data.
  • the time (for example, 4 subframes in LTE) is the time at which the time-frequency resource is used to transmit the corresponding uplink data.
  • the first device may determine the time when the time for transmitting the corresponding uplink data is advanced by the preset evaluation time as the start time for evaluating whether the shared channel is in an idle state. Since the first device evaluates whether the shared channel is in an idle state before the time for transmitting the corresponding uplink data, the probability that the first device occupies the shared channel when transmitting the corresponding uplink data is improved.
  • the scheduling indication information includes a scheduling signal that the second device sends downlink data.
  • the first device determines the start time of the shared channel to be in the idle state.
  • the specific implementation method may be: the first device indicates that the shared channel indicated by the scheduling information of the downlink data is The time of release is determined as the start time to evaluate whether the shared channel is in an idle state.
  • the downlink data sent by the second device to the first device includes scheduling information of the downlink data, where the scheduling information is specifically sent to the first device, instead, the broadcast information may be received by multiple communications devices, where The scheduling information also includes the time when the shared channel is released.
  • the time that the shared channel indicated by the scheduling information of the downlink data is released may be determined to be an evaluation of whether the shared channel is in the The start time of the idle state.
  • the scheduling restriction information includes a pre-configured time range information of the second device occupying the shared channel, where the first device determines, in step 101, a start time for evaluating whether the shared channel is in an idle state, and the specific implementation is performed.
  • the method may be: the first device determines, in the scheduling restriction information, an end time indicated by the time range information of the second device occupying the shared channel as a start time for evaluating whether the shared channel is in an idle state.
  • the scheduling restriction information may be semi-persistent scheduling information, and the time range in which each device in the communication system occupies the shared channel is pre-allocated.
  • the eNodeB sends the downlink data to the UE only in the preset downlink subframe.
  • the first device can learn the time range of the shared channel occupied by the second device according to the scheduling restriction information, and determine the end time indicated by the time range information of the shared channel occupied by the second device in the scheduling restriction information as the evaluation. Whether the shared channel is in the idle state.
  • the first device may determine an evaluation sharing according to the processes corresponding to the foregoing three types of information. Whether the channel is in the start time of the idle state, and then the first device finally determines a start time according to the demand of the transmitted data. For example, the first device receives the broadcast information and the scheduling indication information of the resource scheduling information that is sent by the second device to the first device, and the first device can obtain the time for sending the corresponding uplink data.
  • the first device may obtain the start time determined according to the scheduling indication information; the first device receives the broadcast information and the scheduling restriction information, and at this time, since the scheduling restriction information is specifically sent to the first device, the first device may use the The start time for which the scheduling limit information is determined. It should be noted that, here, the first device receives multiple information to determine whether the shared channel is in the idle state. The process is exemplified, and the first device may also use the corresponding start time according to other conditions and requirements of the actual data transmission, which is not specifically limited.
  • the first device determines, according to the foregoing step 101, a start time for evaluating whether the shared channel is in an idle state
  • the specific implementation manner may be: determining, by the first device, a preset time with the second device as an evaluation center. Indicates whether the shared channel is in the idle state.
  • the first device and the second device may be preset for a time before the communication, and the first device may determine the set time as a start time for evaluating whether the shared channel is in an idle state.
  • the duration of the preset evaluation time includes a length of at least one preset time period.
  • the preset time period is a time required for the first device to evaluate whether the shared channel is in an idle state
  • the duration may be a fixed duration that is pre-configured by the upper layer of the communication system, or may be the first device and the first device.
  • the second device has a fixed length of time agreed upon before the communication, and the duration of the preset evaluation time includes the length of at least one of the preset time periods.
  • the length of a preset time period is 20 ⁇ s or 18 ⁇ s, and the following is an example of 20 ⁇ s.
  • the preset evaluation time may be a time of 20 ⁇ s or P 20 ⁇ s, and P is a preset natural number greater than 1.
  • the first device in the foregoing step 102, is configured to determine whether the shared channel is in an idle state in the preset evaluation time, where the first device is in the Determining that the energy value of the shared channel is higher than a preset power determination threshold in a preset evaluation time, determining that the shared channel is not in an idle state; and if the first device evaluates the sharing in the preset evaluation time If the energy value of the channel is lower than or equal to the preset power determination threshold, it is determined that the shared channel is in an idle state.
  • the first device detects a state of the shared channel within a preset time period of the preset evaluation time from a determined start time of determining whether the shared channel is in an idle state, if the detection is performed within the preset evaluation time If the energy value of the shared channel is lower than or equal to the preset power determination threshold, determining that the shared channel is in an idle state; if the energy value of the shared channel is detected to be higher than a preset in the preset evaluation time
  • the power determining threshold the first device determines that the shared channel is not in an idle state.
  • the energy value of the shared channel may be the channel quality, interference, power, etc. measured by the first device on the shared channel.
  • the first device in step 103 determines whether to transmit data on the shared channel according to an evaluation result of evaluating whether the shared channel is in an idle state, and the specific implementation manner may be implemented. Therefore, the first device evaluates that the shared channel is in the idle state when the preset evaluation time ends, and then transmits data on the shared channel; or, the first device is in the When the time evaluation of the end of the preset evaluation time determines that the shared channel is not in the idle state, the data is not transmitted on the shared message.
  • the first device determines that the shared channel is in an idle state at the time when the preset evaluation time ends, and directly occupies the shared channel, and the data is transmitted on the shared message; and the first device ends at the preset evaluation time. If it is determined that the shared channel is not in an idle state, data cannot currently be transmitted on the shared message.
  • the first device needs to continue to evaluate whether the shared channel is in an idle state, and starts from the time when the preset evaluation time ends, and evaluates whether the shared channel is in an idle state in another preset evaluation time, and the duration of the another preset evaluation time is Q is the length of the preset time period, and Q is a natural number randomly selected by the first device from 1 to the maximum evaluation number of whether the shared channel is in an idle state, and the maximum evaluation number of whether the shared channel is in an idle state is a preset value. .
  • the first device thus repeats the evaluation process until data is transmitted on the shared channel until the shared channel is evaluated to be in an idle state.
  • the shared channel before the data is transmitted by the first device, the shared channel may be occupied by the second device or may be occupied by other UEs. Therefore, the start time of the first device determining whether the shared channel is in an idle state is the foregoing two. The time when the device finally releases the shared channel. For example, if the eNodeB only schedules one UE, the UE uses the time when the eNodeB releases the shared channel as the start time. If the eNodeB schedules the two UEs, the first The scheduled UEs use the time when the eNodeB releases the shared channel as the start time, and the second scheduled UE is the time when the first UE releases the shared channel as the start time.
  • FIG. 2 is a flowchart of another embodiment of a method for transmitting data according to the present invention. As shown in FIG. 2, the method in this embodiment may include:
  • Step 201 The second device determines indication information, where the indication information is used to indicate a start time of the first device to evaluate whether the shared channel is in an idle state before transmitting the data.
  • This embodiment corresponds to the method embodiment shown in FIG. 1 and is a method embodiment of the second device side that communicates with the first device.
  • at least one first device in the communication system determines, according to the indication information, a start time for evaluating whether the shared channel is in an idle state before transmitting data, starting from the start time to a preset evaluation time. The end of the assessment is indeed Whether the shared channel is in an idle state. Since the first device starts to evaluate whether the shared channel is in an idle state before the time of transmitting the data, the first device is likely to detect that the shared channel is in an idle state within a preset evaluation time, and the first device is Once the shared channel is occupied, the data can be transmitted using the pre-allocated resources at the expected time.
  • Step 202 The second device and the first device transmit data on the shared channel, where a start time of the transmission data is after the first device evaluates that the shared channel is in an idle state.
  • the collinear channel can be occupied, and then the second device and the first device can transmit data through the shared channel.
  • the second device by sending, to the first device, indication information indicating that the first device evaluates whether the shared channel is in an idle state before transmitting the data, and determining, by the first device, whether the shared channel is evaluated according to the indication information
  • the start time of the idle state improves the probability that the first device detects that the shared channel is in an idle state within a preset evaluation time, so that the first device can effectively occupy the shared channel and transmit data on the shared channel, thereby avoiding
  • the waste of resources is allocated in advance, and the transmission efficiency of the communication system is improved.
  • the method further includes: the second device sending the indication information to the at least one first device, where the indication information includes At least one of broadcast information, scheduling indication information, and scheduling restriction information of a start time at which the first device evaluates whether the shared channel is in an idle state before transmitting data.
  • the method further includes: the second device presetting, by the first device, the first device, whether the shared channel is in an idle state. The start time of the assessment.
  • the scheduling indication information For the information included in the broadcast information, the scheduling indication information, and the scheduling restriction information, reference may be made to the method embodiment shown in FIG. 1 , and details are not described herein again.
  • FIG. 3 is a timing diagram of data transmission by the first device and the second device. It is assumed that the preset evaluation time includes the length of one preset time period, and the length of the preset time period is 20 ⁇ s. As shown in FIG. 3, the second device eNodeB sends broadcast information, and the first device UE can determine by using the broadcast message. The eNodeB will occupy 5 subframes of the shared channel and release the shared channel at the first 20 ⁇ s of the end of the subframe n-1. After determining the time information, the first device UE can detect the idle state of the shared channel by detecting the energy value of the shared channel from the first 20 ⁇ s of the end time of the subframe n-1. Thus, after 20 ⁇ s of evaluation, the shared channel is idle, and the UE can occupy the shared channel and transmit data at the beginning of the subframe n.
  • the second device eNodeB sends resource scheduling information to the first device UE through the PDCCH or the ePDCCH in the subframe n-4, indicating the UE.
  • the UE determines the slave according to the time relationship between the time (subframe n-4) of receiving the resource scheduling information and the time (subframe n) of transmitting the corresponding uplink data.
  • the first 20 ⁇ s of the end time of the frame n-1 is the time at which the shared channel is released and the energy value of the shared channel is detected from the time to evaluate the idle state of the shared channel.
  • the shared channel is idle, and the UE can occupy the shared channel and transmit data at the start time of the subframe n as expected in the subframe n.
  • FIG. 5 is a third timing diagram of data transmission by the first device and the second device.
  • the second device eNodeB sends broadcast information
  • the first first device UE1 and the second first device UE2 may be configured according to The broadcast information determines time information at which the shared channel is released.
  • the UE 1 may determine that the time when the shared channel is released by the second device is the time of the first 20 ⁇ s of the end time of the subframe n-1.
  • UE2 may determine that the time when the shared channel is released by UE1 is the time of the first 20 ⁇ s of the end time of subframe n+1.
  • the UE1 can detect the idle state of the shared channel by detecting the energy value of the shared channel from the first 20 ⁇ s of the end time of the subframe n-1. In this way, after the 20 ⁇ s evaluation, the shared channel is idle, UE1 can occupy the shared channel and transmit data at the beginning of the subframe n; and UE2 can detect the energy value of the shared channel from the first 20 ⁇ s of the end of the subframe n+1. Evaluate the idle state of the shared channel. Thus, after the 20 ⁇ s evaluation, the shared channel is idle, and UE2 can occupy the shared channel and transmit data at the beginning of the subframe n+2.
  • a time relationship may be preset between the eNodeB and the UE, for example, the first 20 ⁇ s of each subframe is used as a preset evaluation time, or the last 20 ⁇ s of each subframe is used as a preset evaluation time, where the first device is in the pre- Let the start time of the evaluation time begin to evaluate the idle state of the shared channel.
  • FIG. 6 is a schematic structural diagram of an embodiment of a communication system according to the present invention.
  • a macro base station Mocro eNodeB
  • a micro base station Pico eNodeB
  • transmit backhaul data through resources of a shared channel and simultaneously
  • the macro base station and the UE, the micro base station, and the UE respectively share the letter Channel transfer data.
  • Any one of the macro base station, the micro base station, and the UE needs to evaluate the idle state of the shared channel before transmitting the data through the shared channel, wherein the macro base station and the micro base station can alternately serve as the first device and the second device.
  • FIG. 7 is a fourth timing diagram of data transmission by the first device and the second device. As shown in FIG.
  • the macro base station as the second device first occupies the shared channel from the subframe n-4 to the subframe n-
  • the macro base station sends the broadcast information to the micro base station, including the time information that the shared channel is released.
  • the micro base station serves as the first device, and the micro base station determines, according to the broadcast information, the start time for evaluating whether the shared channel is in an idle state. It is the time 20 ⁇ s before the end of the subframe n-1; the micro base station evaluates the idle state of the shared channel within 20 ⁇ s from the start time (that is, the time 20 ⁇ s before the end of the subframe n-1).
  • the micro base station transmits the broadcast information to the macro base station as the second device, and the macro base station serves as the first device, and the macro base station broadcasts according to the broadcast.
  • the information determines that the start time of evaluating whether the shared channel is in an idle state is the start time of the subframe n+2; the macro base station evaluates the idle of the shared channel within 20 ⁇ s from the start time (ie, the start time of the subframe n+2) status. If the evaluation result is that the shared channel is idle, the shared channel is occupied 20 ⁇ s from the start of the subframe n+2 to the end of the subframe n+3.
  • the macro base station and the micro base station realize the probability of detecting the idle state of the shared channel on the determined time and frequency resources by alternately acting as the first device and the second device, so that the first device and the second device The device alternately occupies the shared channel and communicates on the shared channel, avoiding waste of pre-allocated resources and improving the transmission efficiency of the communication system.
  • FIG. 8 is a schematic structural diagram of an embodiment of a communication device according to the present invention.
  • the apparatus in this embodiment may include: a determining module 11, an evaluating module 12, and a communication module 13, wherein the determining module 11 is configured to determine Evaluating whether the shared channel is in an idle state; the evaluation module 12 is configured to evaluate whether the shared channel is in an idle state within a preset evaluation time from the start time; the communication module 13 is configured to The result of the evaluation of whether the shared channel is in an idle state determines whether data is transmitted on the shared channel.
  • the device in this embodiment may be used to implement the technical solution of the method embodiment shown in FIG. 1 , and the implementation principle and technical effects are similar, and details are not described herein again.
  • the communication module 13 is further configured to receive at least one of broadcast information, scheduling indication information, and scheduling restriction information sent by the second device.
  • the broadcast information includes time information that the shared channel is released; the determining module 11 is specifically configured to indicate time information that the shared channel is released in the broadcast information.
  • the time is determined as a start time for evaluating whether the shared channel is in an idle state.
  • the scheduling indication information includes resource scheduling information that is sent by the second device to the first device to send uplink data
  • the determining module 11 is specifically configured to: according to the resource scheduling indication that receives the uplink data. Determining, by the timing relationship between the time of the information and the time of the uplink data corresponding to the transmission indicated by the scheduling indication information of the uplink data, determining the time for transmitting the corresponding uplink data, and using the uplink data corresponding to the sending The time when the time advances the preset evaluation time is determined as a start time for evaluating whether the shared channel is in an idle state.
  • the scheduling indication information includes scheduling information that the second device sends downlink data, where the determining module 11 is specifically configured to determine, when the shared channel indicated by the scheduling information of the downlink data is released, To evaluate whether the shared channel is in the idle state.
  • the scheduling restriction information includes pre-configured time range information of the second device occupying the shared channel, where the determining module 11 is configured to: in the scheduling restriction information, the second device occupies a shared channel.
  • the end time indicated by the time range information is determined as the start time for evaluating whether the shared channel is in an idle state.
  • the determining module 11 is specifically configured to determine a time preset with the second device as a start time for evaluating whether the shared channel is in an idle state.
  • the duration of the preset evaluation time includes a length of at least one preset time period.
  • the evaluating module 12 is specifically configured to: if the energy value of the shared channel is higher than a preset power determination threshold in the preset evaluation time, determine that the shared channel is not in an idle state; And determining, in the preset evaluation time, that the energy value of the shared channel is lower than or equal to the preset power determination threshold, determining that the shared channel is in an idle state.
  • the communication module 13 is configured to: when the estimated time of the preset evaluation time ends, determine that the shared channel is the idle state, and then transmit data on the shared channel; or, in the When the time at which the preset evaluation time ends is determined to be that the shared channel is not in an idle state, data is not transmitted on the shared message.
  • FIG. 9 is a schematic structural diagram of another embodiment of a communication device according to the present invention.
  • the device in this embodiment may include: a determining module 21 and a communication module 22, wherein the determining module 21 is configured to determine indication information.
  • the indication information is used to indicate a start time of the first device to evaluate whether the shared channel is in an idle state before transmitting the data;
  • the communication module 22 is configured to transmit data on the shared channel with the first device, where The start time of the transmission data is in the first device rating After the shared channel is estimated to be in an idle state.
  • the device in this embodiment may be used to implement the technical solution of the method embodiment shown in FIG. 2, and the implementation principle and technical effects are similar, and details are not described herein again.
  • the communication module 22 is further configured to send the indication information to the at least one first device, where the indication information is used to indicate whether the first device compares the shared channel before transmitting data At least one of broadcast information, scheduling indication information, and scheduling restriction information at the start time of the evaluation in the idle state.
  • the determining module 21 is further configured to preset, in advance, a start time of the first device, where the indication information indicates, whether the shared channel is in an idle state.
  • the device in this embodiment may include: a processor 31 and a transceiver 32, wherein the processor 31 is configured to determine an evaluation share. Whether the channel is in an idle state; determining whether the shared channel is in an idle state within a preset evaluation time from the start time; and the transceiver 32 configured to evaluate whether the shared channel is in an idle state The result of the evaluation determines whether data is transmitted on the shared channel.
  • the device in this embodiment may be used to implement the technical solution of the method embodiment shown in FIG. 1 , and the implementation principle and technical effects are similar, and details are not described herein again.
  • the transceiver 32 is further configured to receive at least one of broadcast information, scheduling indication information, and scheduling restriction information sent by the second device.
  • the broadcast information includes time information that the shared channel is released, and the processor 31 is specifically configured to determine, as the evaluation station, a time indicated by the time information that the shared channel is released in the broadcast information. Indicates whether the shared channel is in the idle state.
  • the scheduling indication information includes resource scheduling information that is sent by the second device to the first device to send uplink data
  • the processor 31 is specifically configured to: according to the resource scheduling indication that receives the uplink data. Determining, by the timing relationship between the time of the information and the time of the uplink data corresponding to the transmission indicated by the scheduling indication information of the uplink data, determining the time for transmitting the corresponding uplink data, and using the uplink data corresponding to the sending The time when the time advances the preset evaluation time is determined as a start time for evaluating whether the shared channel is in an idle state.
  • the scheduling indication information includes scheduling information that the second device sends downlink data, where the processor 31 is specifically configured to: use the shared information indicated by the scheduling information of the downlink data.
  • the time at which the channel is released is determined as the start time for evaluating whether the shared channel is in an idle state.
  • the scheduling restriction information includes pre-configured time range information of the second device occupying the shared channel, where the processor 31 is configured to: in the scheduling restriction information, the second device occupies a shared channel.
  • the end time indicated by the time range information is determined as the start time for evaluating whether the shared channel is in an idle state.
  • the processor 31 is specifically configured to determine a time preset with the second device as a start time for evaluating whether the shared channel is in an idle state.
  • the duration of the preset evaluation time includes a length of at least one preset time period.
  • the processor 31 is configured to determine that the shared channel is not in an idle state if the energy value of the shared channel is higher than a preset power determination threshold in the preset evaluation time; And determining, in the preset evaluation time, that the energy value of the shared channel is lower than or equal to the preset power determination threshold, determining that the shared channel is in an idle state.
  • the transceiver 32 is configured to: when the estimated time of the preset evaluation time ends, determine that the shared channel is the idle state, and then transmit data on the shared channel; or, in the When the time at which the preset evaluation time ends is determined to be that the shared channel is not in an idle state, data is not transmitted on the shared message.
  • FIG. 11 is a schematic structural diagram of a fourth embodiment of a communication device according to the present invention.
  • the device in this embodiment may include: a processor 41 and a transceiver 42, wherein the processor 41 is configured to determine indication information.
  • the indication information is used to indicate a start time of the first device to evaluate whether the shared channel is in an idle state before transmitting the data, and the transceiver 42 is configured to transmit data on the shared channel with the first device, The start time of the transmission data is after the first device evaluates that the shared channel is in an idle state.
  • the device in this embodiment may be used to implement the technical solution of the method embodiment shown in FIG. 2, and the implementation principle and technical effects are similar, and details are not described herein again.
  • the transceiver 42 is further configured to send the indication information to the at least one first device, where the indication information is used to indicate whether the first device compares the shared channel before transmitting data At least one of broadcast information, scheduling indication information, and scheduling restriction information at the start time of the evaluation in the idle state.
  • the processor 41 is further configured to preset, in advance, a start time of the first device, where the indication information indicates, whether the shared channel is in an idle state.
  • FIG. 12 is a schematic structural diagram of an embodiment of a communication system according to the present invention.
  • the system of the present embodiment includes: a first device 51 and a second device 52, wherein the first device 51 can adopt the method shown in FIG.
  • the technical solution of the method embodiment shown in FIG. 1 can be performed correspondingly, and the implementation principle and technical effects are similar, and details are not described herein;
  • the second device 52 can adopt the device embodiment shown in FIG.
  • the technical solution of the method embodiment shown in FIG. 2 can be performed correspondingly, and the implementation principle and the technical effect are similar, and details are not described herein again.
  • the first device 51 may adopt the structure of the device embodiment shown in FIG. 10, and correspondingly, the technical solution of the method embodiment shown in FIG. 1 may be performed, and the implementation principle thereof is implemented. Similar to the technical effects, the details are not described herein; the second device 52 can adopt the structure of the device embodiment shown in FIG. 11 , and correspondingly, the technical solution of the method embodiment shown in FIG. 2 can be executed, and the implementation principle and technical effects thereof are implemented. Similar, it will not be repeated here.
  • the disclosed apparatus and method may be implemented in other manners.
  • the device embodiments described above are merely illustrative.
  • the division of the unit is only a logical function division.
  • there may be another division manner for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored or not executed.
  • the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be in an electrical, mechanical or other form.
  • the units described as separate components may or may not be physically separated, and the components displayed as the unit may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. . Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of the embodiment.
  • each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.
  • the above integrated unit can be implemented in the form of hardware or in the form of hardware plus software functional units.
  • the above-described integrated unit implemented in the form of a software functional unit can be stored in a computer readable storage medium.
  • the above software functional unit is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) or a processor to perform the methods of the various embodiments of the present invention. Part of the steps. And the foregoing
  • the storage medium includes: a USB flash drive, a removable hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk, and the like, which can store program codes.

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Abstract

Selon des modes de réalisation, la présente invention concerne un procédé, un dispositif et un système de transmission de données. Le procédé de transmission de données selon la présente invention comprend : un premier dispositif qui détermine une heure de début pour évaluer si un canal partagé est dans un état de repos ; le premier dispositif qui commence, à partir de l'heure de début, à évaluer, à l'intérieur d'un temps d'évaluation prédéfini, si le canal partagé est dans l'état de repos ; et le premier dispositif qui détermine, selon un résultat d'évaluation permettant d'évaluer si le canal partagé est dans l'état de repos, s'il faut transmettre des données sur le canal partagé. Les modes de réalisation de la présente invention évitent le gaspillage de ressources préattribuées et améliorent l'efficacité de transmission d'un système de communication.
PCT/CN2015/075542 2015-03-31 2015-03-31 Procédé, appareil et système de transmission de données WO2016154907A1 (fr)

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