WO2017035940A1 - D2d通信方法、用户设备及基站 - Google Patents

D2d通信方法、用户设备及基站 Download PDF

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Publication number
WO2017035940A1
WO2017035940A1 PCT/CN2015/093523 CN2015093523W WO2017035940A1 WO 2017035940 A1 WO2017035940 A1 WO 2017035940A1 CN 2015093523 W CN2015093523 W CN 2015093523W WO 2017035940 A1 WO2017035940 A1 WO 2017035940A1
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Prior art keywords
channel
measurement
time
idle
connection
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English (en)
French (fr)
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张晨璐
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Yulong Computer Telecommunication Scientific Shenzhen Co Ltd
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Yulong Computer Telecommunication Scientific Shenzhen Co Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria
    • H04W72/542—Allocation or scheduling criteria for wireless resources based on quality criteria using measured or perceived quality
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0446—Resources in time domain, e.g. slots or frames
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0453—Resources in frequency domain, e.g. a carrier in FDMA

Definitions

  • the present invention relates to the field of wireless communications, and in particular, to a D2D communication method, a user equipment, and a base station.
  • the device-to-device (D2D) communication technology refers to the direct communication between the user equipment (UE, User Equipment) by multiplexing the spectrum resources of the cell, instead of using the source terminal as the traditional communication service. It is sent to the base station, and then forwarded by the base station to the destination terminal. Therefore, D2D communication can utilize spectrum resources more efficiently and increase the capacity of the cellular network.
  • UE User Equipment
  • D2D multi-hop data transmission is a D2D-based distributed network, which introduces relay technology into the D2D communication system.
  • a specific D2D UE in the D2D distributed network has multiple D2D connections. Thereby, the network capacity can be further increased, the spectrum utilization rate can be improved, the system failure rate can be reduced, and the system performance and user experience can be improved.
  • the 3GPP protocol has not considered the multi-hop data transmission scenario based on D2D.
  • both the base station allocation mode and the self-selected resource allocation mode have their unavoidable drawbacks.
  • the embodiment of the invention provides a D2D communication method, a user equipment and a base station, which can realize resource allocation of the D2D distributed network and realize efficient use of the channel.
  • an embodiment of the present invention provides a D2D communication method, including:
  • the UE acquires a D2D distributed network data transmission request; the UE acquires a time-frequency domain resource for performing channel measurement; and after acquiring the D2D distributed network data transmission request, the UE measures one of the channels in which the time-frequency domain resource is located to determine whether the channel is idle. If the channel is idle, the UE establishes a D2D connection on the channel.
  • the acquiring, by the UE, the time-frequency domain resource for performing channel measurement includes: acquiring, by the UE, a frequency domain range and a time domain range for performing channel measurement; and the time domain range includes the base station The specified measurement-specific subframe; or, the time domain range includes a silent period of normal data transmission and reception learned from the base station configuration.
  • the determining, by the UE, one of the channels in which the time-frequency domain resource is located to determine whether the channel is idle includes: calculating, by the UE, the power of the signal of different signal sources on the channel The sum; if the sum of the powers is less than the preset threshold, the UE determines that the channel is an idle channel.
  • the determining, by the UE, one of the channels in which the time-frequency domain resource is located to determine whether the channel is idle includes: when the UE detects a regular flag on the channel For the sexual signal, the UE determines that the channel is not idle.
  • the UE performs a preset threshold M measurement on the channel, If the results of the M measurements are all idle, the UE confirms that the channel is idle, and M measurements are discontinuous measurements or continuity measurements.
  • a fifth possible implementation manner of the first aspect if the channel is not idle, the UE jumps to the next channel for measurement or presets After the measurement avoidance time, the measurement is performed again on the channel.
  • the UE pre-occupies the channel, and the pre-occupied channel is a non-idle channel; The UE establishes a D2D connection through the channel, and when the time point at which the D2D connection is established is reached, the UE establishes a D2D connection through the channel.
  • the UE acquires the measurement random quantity B and the measurement duration T; the UE measures the channel where the time-frequency domain resource is located. Determining whether the channel is idle includes: determining, by the UE, the measurement start time of the UE according to the measurement random quantity B and the measurement time length T; the UE measures the channel within the measurement time length T from the measurement start time to determine whether the channel is idle.
  • the UE acquires a maximum number of relays of the D2D distributed network connection; the UE establishes a D2D connection on the channel.
  • the method includes: the UE establishes a D2D connection on the channel, and the number of relays used by the D2D connection is less than or equal to the maximum number of relays.
  • the UE acquires a maximum number of connections of the D2D distributed network connection;
  • the channel establishes a D2D connection, and the UE determines whether the number of D2D connections of the channel is greater than the maximum number of connections. If not, the UE establishes a D2D connection on the channel.
  • an embodiment of the present invention provides a D2D communication method, including:
  • the base station sends a data transmission request of the D2D distributed network to the UE; the base station sends the time-frequency domain resource for the channel measurement to the UE, and the time-frequency domain resource is used to enable the UE to measure the channel where the time-frequency domain resource is located to determine whether the channel is idle. If the channel is idle, a D2D connection is established through the channel.
  • the base station sends the time-frequency domain resource for performing channel measurement to the UE, where the base station sends the frequency domain range and the time domain range for performing channel measurement to the UE;
  • the domain range includes measurement-specific subframes, or the time interval of abnormal data transmission indicated by parameters.
  • the base station sends the measurement random quantity B and the measurement duration T to the UE, and measures the random quantity B and
  • the measurement duration T is used to cause the UE to determine the measurement start time on the time-frequency domain resource, and from the measurement start time, measure the channel within the measurement duration T to determine whether the channel is idle.
  • the base station sends the maximum number of relays of the D2D distributed network connection to the UE, and the maximum relay The number of relays used to limit the UE to establish a D2D connection on the channel should be less than or equal to the maximum number of relays.
  • the base station sends the maximum number of connections of the D2D distributed network connection to the UE, where the maximum number of connections is used.
  • the UE determines that its own number of D2D connections is not greater than the maximum number of connections, a D2D connection is established on the channel.
  • an embodiment of the present invention provides a user equipment, including:
  • a first acquiring module configured to acquire a D2D distributed network data transmission request
  • a second acquiring module configured to acquire a time-frequency domain resource for performing channel measurement
  • a measuring module configured to acquire a D2D distributed network data transmission in the first acquiring module
  • one channel of the time-frequency domain resource is measured to determine whether the channel is idle
  • a connection establishment module is configured to establish a D2D connection on the channel when the channel is idle.
  • the second acquiring module Specifically, the frequency domain range and the time domain range for performing channel measurement are obtained; the time domain range includes a measurement-specific subframe specified by the base station; or the time domain range includes a silent period of normal data transmission and reception learned according to the configuration of the base station.
  • the measuring module includes: a calculating unit, configured to calculate a sum of powers of signals of different signal sources on the channel; and a first determining unit, configured to When the threshold is less than the preset threshold, it is determined that the channel is an idle channel.
  • the measuring module is specifically configured to determine that the channel is not idle when the UE detects a regular landmark signal on the channel.
  • the measurement module performs a preset threshold M measurement on the channel If the results of the M measurements are all idle, the UE confirms that the channel is idle, and M measurements are discontinuous measurements or continuity measurements.
  • the measuring module is further configured to: when the channel is not idle, jump to the next channel for measurement Or re-measure on the channel after the preset measurement avoidance time.
  • the user equipment further includes: a processing module, configured to pre-empt the channel when the channel is idle, The pre-occupied channel is a non-idle channel; the connection establishing module is specifically configured to establish a D2D connection through the channel when a time point of establishing the D2D connection is reached.
  • the user equipment further includes: a third acquiring module, configured to acquire the measured random quantity B and the measurement duration T;
  • the module includes: a second determining unit, configured to determine a measurement start time of the UE according to the measurement random quantity B and the measurement time length T; and a measuring unit, configured to measure the channel within the measurement time length T from the measurement start time to determine Whether the channel is idle.
  • the user equipment further includes:
  • a fourth acquiring module configured to acquire a maximum number of relays of the D2D distributed network connection
  • the connection establishment module is specifically configured to establish a D2D connection on the channel, and the number of relays used by the D2D connection is less than or equal to the maximum number of relays.
  • the user equipment further includes:
  • a fifth obtaining module configured to obtain a maximum number of connections of the D2D distributed network connection
  • Connection establishment module including:
  • a determining unit configured to determine whether the number of D2D connections is greater than a maximum number of connections
  • the connecting unit is configured to determine, when the determining unit determines that the number of D2D connections is not greater than the maximum number of connections, establishing a D2D connection on the channel.
  • an embodiment of the present invention provides a base station, including:
  • a first sending module configured to initiate a data transmission request of the D2D distributed network to the UE
  • a second sending module configured to send, to the UE, a time-frequency domain resource for performing channel measurement, where the time-frequency domain resource is used to enable the UE to measure a channel where the time-frequency domain resource is located to determine whether the channel is idle, and if the channel is idle, pass the channel Establish a D2D connection.
  • the first sending module is specifically configured to send, to the UE, a frequency domain range and a time domain range for performing channel measurement; the time domain range includes a measurement specific subframe, Or the time interval for sending abnormal data indicated by parameters.
  • the base station further includes:
  • a third sending module configured to send a measurement random quantity B and a measurement duration T to the UE, where the measurement random quantity B and the measurement duration T are used to enable the UE to determine a measurement start time on the time-frequency domain resource, and from the measurement start time Initially, the channel is measured over the measurement duration T to determine if the channel is idle.
  • the base station further includes:
  • the fourth sending module is configured to send the maximum number of relays of the D2D distributed network connection to the UE, where the maximum number of relays is used to limit the number of relays used by the UE to establish a D2D connection on the channel, which should be less than or equal to the maximum number of relays.
  • the base station further includes:
  • a fifth sending module configured to send, to the UE, a maximum number of connections of the D2D distributed network connection, where the maximum number of connections is used to enable the UE to determine the number of D2D connections in the channel when the number of D2D connections is not greater than the maximum number of connections. Establish a D2D connection.
  • the UE acquires the D2D distributed network data transmission request, acquires the time-frequency domain resource for performing channel measurement, and then measures the channel where the time-frequency domain resource is located to determine whether the channel is idle, and if the channel is idle, A D2D connection is established through the channel.
  • the invention proposes a resource allocation process based on a D2D distributed network, which can realize resource allocation in a D2D multi-hop data transmission scenario based on a D2D distributed network.
  • FIG. 1 is a schematic diagram of a D2D distributed network in an embodiment of the present invention.
  • FIG. 2 is a flowchart of a D2D communication method according to an embodiment of the present invention.
  • FIG. 3 is another flowchart of a D2D communication method according to an embodiment of the present invention.
  • FIG. 5 is a schematic diagram of channel measurement time and measurement interval of D2D communication according to an embodiment of the present invention.
  • FIG. 6 is a schematic diagram of a pre-occupied channel of D2D communication according to an embodiment of the present invention.
  • FIG. 7 is another schematic diagram of a pre-occupied channel of D2D communication according to an embodiment of the present invention.
  • FIG. 8 is another schematic diagram of channel measurement time and measurement interval of D2D communication according to an embodiment of the present invention.
  • FIG. 9 is another schematic diagram of a pre-occupied channel of D2D communication according to an embodiment of the present invention.
  • FIG. 10 is another schematic diagram of a pre-occupied channel of D2D communication according to an embodiment of the present invention.
  • FIG. 11 is a flowchart of a D2D communication method on a base station side according to an embodiment of the present invention.
  • FIG. 12 is a schematic diagram of functional modules of a user equipment according to an embodiment of the present invention.
  • FIG. 13 is a schematic diagram of another functional module of a user equipment according to an embodiment of the present invention.
  • FIG. 14 is a schematic diagram of another functional module of a user equipment according to an embodiment of the present invention.
  • FIG. 15 is a schematic diagram of functional blocks of a base station according to an embodiment of the present invention.
  • the embodiment of the invention provides a D2D communication method, a user equipment and a base station, which are used for XX. The details are described below separately.
  • D2D multi-hop data transmission is a D2D-based distributed network, which introduces relay technology into the D2D communication system, so that a certain D2D UE in the D2D distributed network has multiple D2D connections, as shown in the schematic diagram of the distributed network in Figure 1D2D.
  • a D2D UE can support multiple D2D connections.
  • an embodiment of the present invention provides a method for D2D communication, including:
  • the UE acquires a D2D distributed network data transmission request.
  • the base station or the UE itself needs to trigger the network construction process, and the UE acquires the D2D distributed network data transmission request, so that the UE can start to establish the D2D connection of the D2D distributed network.
  • the D2D distributed network data transmission request is sent by the base station to the UE through broadcast signaling or Radio Resource Control (RCC); if triggered by the UE itself
  • RRC Radio Resource Control
  • the D2D distributed network data transmission request is obtained from its own application layer, and the specific manner is not limited herein.
  • the UE acquires a time-frequency domain resource for performing channel measurement.
  • the UE When establishing a D2D connection based on a distributed network, the UE needs to perform channel measurement to find an idle channel. When performing channel measurement, the UE needs to acquire time-frequency domain resources for performing channel measurement.
  • the time-frequency domain resource may be sent by the base station to the time-frequency domain resource of the UE, or may be a time-frequency domain pre-configured by the serving base station of the serving cell where the UE is located or configured by the UE.
  • the base station sends a data transmission request of the D2D distributed network to the UE and sends the time-frequency domain resource for performing channel measurement to the UE, the two may be sent to the UE together through the same signaling. It can be sent to the UE through different signaling, which is not limited here.
  • the UE After acquiring the D2D distributed network data transmission request, the UE performs measurement on one of the channels in which the time-frequency domain resource is located to determine whether the channel is idle.
  • the frequency domain range of the time-frequency domain resource acquired by the UE is divided into multiple channels. After acquiring the D2D distributed network data transmission request, the UE measures the channel where the time-frequency domain resource is located to find an idle channel. Is to measure one of the channels to determine if the channel is idle.
  • the UE If the channel is idle, the UE establishes a D2D connection on the channel.
  • the UE After the UE measures the channel, when it is determined that the channel is an idle channel, the UE establishes a D2D connection on the channel.
  • the UE after acquiring the D2D distributed network construction command, acquires the time-frequency domain resource for performing channel measurement, and then measures the channel where the time-frequency domain resource is located to determine whether the channel is idle, and if the channel is idle, Then a D2D connection is established through the channel.
  • the invention proposes a resource allocation process based on a D2D distributed network, which can realize resource allocation in a D2D multi-hop data transmission scenario based on a D2D distributed network.
  • the time-frequency domain resources acquired by the UE include a time domain range and a frequency domain range.
  • the frequency domain range in which the UE performs measurement may be some subchannels directly sent by the base station to the UE through broadcast signaling or Radio Resource Control (RCC) signaling, or may be used by the base station.
  • the D2D communication has a large frequency domain range, and the UE divides the frequency domain resources according to its own needs to form a plurality of subchannels.
  • the time domain range that the UE performs the measurement may be a measurement-specific subframe that is sent by the base station through the broadcast signaling or the RCC signaling, or may be a configuration parameter that the base station sends to the UE, and the UE learns the normal data through the UE according to the configuration parameter.
  • the quiet period of transmission and reception is performed for channel measurement.
  • the silent period is the idle period of normal data transmission, for example, the Multimedia Broadcast multicast service Single Frequency Network (MBSFN) subframe or time division double. Guard period (GP) in a special sub-frame of Time Division Duplexing (TDD).
  • the method of idle detection of a channel may be judged by the sum of signal powers on the channel, which is described in detail below:
  • an embodiment of the present invention provides a D2D communication method, including:
  • the UE acquires a D2D distributed network data transmission request.
  • the base station or the UE itself needs to trigger the network construction process, and the UE acquires the D2D distributed network data transmission request, so that the UE can start to establish the D2D connection of the D2D distributed network.
  • the D2D distributed network data transmission request is sent by the base station to the UE through broadcast signaling or Radio Resource Control (RCC); if triggered by the UE itself
  • RRC Radio Resource Control
  • the D2D distributed network data transmission request is obtained from its own application layer, and the specific manner is not limited herein.
  • the UE acquires a time-frequency domain resource for performing channel measurement.
  • the UE When establishing a D2D connection based on a distributed network, the UE needs to perform channel measurement to find an idle channel. When performing channel measurement, the UE needs to acquire time-frequency domain resources for performing channel measurement.
  • the time-frequency domain resource may be sent by the base station to the time-frequency domain resource of the UE, or may be a time-frequency domain pre-configured by the serving base station of the serving cell where the UE is located or configured by the UE.
  • the base station sends a data transmission request of the D2D distributed network to the UE and sends the time-frequency domain resource for performing channel measurement to the UE, the two may be sent to the UE together through the same signaling. It can be sent to the UE through different signaling, which is not limited here.
  • the UE calculates a sum of powers of signals of different signal sources on one of the channels in which the time-frequency domain resource is located.
  • the frequency domain range in the time-frequency domain resource acquired by the UE is divided into multiple sub-channels.
  • the UE measures the channel where the time-frequency domain resource is located to find an idle channel, and the specific measurement is performed. At the time, one of the channels is measured to determine if the channel is idle.
  • the specific measurement method is: the UE calculates the sum of powers ⁇ Rx of the signals of different signal sources on the channel, and in particular, if the detection channel is not in the same frequency band as the current working frequency of the current UE,
  • the measurement gap is configured by the base station or the UE spontaneously, and the inter-frequency measurement is initiated within the measurement gap time.
  • the UE determines whether the sum of powers is less than a preset threshold to determine that the channel is an idle channel.
  • the UE determines that the channel is an idle channel. If the channel is greater than or equal to the preset threshold, the UE determines that the channel is a non-idle channel.
  • the preset threshold may be sent by the base station through the measurement parameter, or may be configured in the pre-configured parameter of the UE.
  • the UE in order to avoid interference caused by a short-time channel idle occupied channel, the UE performs multiple measurements on the channel in a preset time, and the number of measurements is a preset threshold M, if M measurements are performed. When the result is idle, the UE considers that the channel is truly idle. It should be noted that the M measurement may be a discontinuity measurement or a continuity measurement.
  • the UE If the channel is idle, the UE establishes a D2D connection on the channel.
  • the UE After the UE measures the channel, when it is determined that the channel is an idle channel, the UE establishes a D2D connection on the channel.
  • the UE If the channel is not idle, the UE jumps to the next channel for measurement or re-measures the channel after the preset measurement avoidance time.
  • the UE If the UE detects that the channel is not idle, the UE jumps to the next subchannel of the time frequency domain resource for measurement, or re-measures the channel after the preset measurement avoidance time.
  • the UE when the UE detects a regular landmark signal on the channel, indicating that other UEs have pre-occupied the channel, the UE may determine that the channel is a non-idle channel.
  • the UE may determine whether the measurement channel is idle by calculating whether the sum of powers of different signals on the channel is less than a preset threshold, or determine whether the channel is idle by detecting whether the channel has a regular iconic signal, thereby improving The achievability of the program.
  • multiple UEs perform channel measurement on a time-frequency domain resource at the same time.
  • the embodiment of the present invention adopts pre-occupied channel and random access. Measuring time mechanism. The following is a detailed description:
  • an embodiment of the present invention provides a D2D communication method, including:
  • the UE acquires a D2D distributed network data transmission request.
  • the base station or the UE itself needs to trigger the network construction process, and the UE acquires the D2D distributed network data transmission request, so that the UE can start to establish the D2D connection of the D2D distributed network.
  • the UE acquires a time-frequency domain resource for performing channel measurement.
  • channel measurement is required to find an idle channel.
  • the UE needs to acquire time-frequency domain resources for performing channel measurement.
  • the time-frequency domain resource may be sent by the base station to the time-frequency domain resource of the UE, or may be a time-frequency domain pre-configured by the serving base station of the serving cell where the UE is located or configured by the UE.
  • the time-frequency domain resource for performing channel measurement includes a time domain range and a frequency domain range. Therefore, the UE actually acquires a time domain range for performing channel measurement and a frequency domain range for performing measurement.
  • the frequency domain range in which the UE performs measurement may be some subchannels directly sent by the base station to the UE through broadcast signaling or Radio Resource Control (RCC) signaling, or may be used by the base station.
  • the D2D communication has a large frequency domain range, and the UE divides the frequency domain resources according to its own needs to form a plurality of subchannels.
  • the time domain range that the UE performs the measurement may be a measurement-specific subframe that is sent by the base station through the broadcast signaling or the RCC signaling, or may be a configuration parameter that the base station sends to the UE, and the UE learns to pass certain normal data according to the configuration parameter.
  • the silent period of transmission and reception is used for channel measurement.
  • the silent period is the idle period of normal data transmission, for example, Multicast/Multicast Single Frequency Network (MBSFN) subframe or time division duplex (Time Division) Duplexing, TDD) Guard period (GP) in special subframes.
  • MBSFN Multicast/Multicast Single Frequency Network
  • TDD Time Division duplex
  • Guard period GP
  • the UE acquires the measured random quantity B and the measurement duration T.
  • the UE When the UE performs the channel measurement, in order to avoid the measurement conflict caused by the D2D distributed network node performing channel measurement at the same time, the UE acquires the measurement random quantity B, which is used to determine the random time quantity that the UE initiates the channel measurement, and the UE acquires The measurement duration T, T is the continuous measurement time of the channel measurement by the UE.
  • the measurement random quantity B may be sent by the base station to the UE through dedicated signaling, or may be determined by the UE itself, or may be configured by the base station to have a random quantity B pool, and the UE A random amount B, which is measured by the UE, is randomly selected from the random amount B pool.
  • the measurement duration T may be sent by the base station to the UE through the broadcast signaling, or may be a fixed constant specified by the protocol, or may be pre-configured by the UE itself, which is not limited herein.
  • the measurement of the random quantity B, the measurement time length T, and the measurement time-frequency domain resource are all sent by the base station, it may be delivered as a parameter of the channel measurement in one signaling, or may be different.
  • the signaling is sent. The specific method is not limited here.
  • the UE determines, according to the measured random quantity B and the measurement duration T, a measurement start time of the UE on the time-frequency domain resource.
  • the measurement start time of the UE on the time-frequency domain resource is determined according to the measurement random quantity B and the measurement duration T, so that each UE is measured on the time-frequency domain resource.
  • the start time is different and the time for the measurement can be staggered.
  • the UE starts measuring, according to the measurement start time, one of the channels in which the time-frequency domain is located within the measurement duration T to determine whether the channel is idle.
  • the UE After determining the measurement start time, the UE measures one channel of the time-frequency domain within the measurement duration T from the respective measurement start time to determine whether the channel is idle.
  • the UE pre-occupies the channel.
  • the channel is pre-occupied.
  • the pre-occupied signal is sent on the channel, and the pre-occupied signal may be an irregular power signal sent on a channel, or may be a regular identifier signal, and the regular identifier signal may be a fixed transmission period and sent. Duration, the specific signal of the format sent.
  • the UE When the time point of establishing the D2D connection is reached, the UE establishes a D2D connection on the channel.
  • the UE After the UE pre-occupies the channel, when the time point at which the UE establishes the D2D connection is reached, the UE establishes a D2D connection on the channel.
  • the UE determines the measurement start time on the channel where the frequency domain resource is located during the channel measurement by measuring the random quantity B and the measurement duration T, so that the measurement access time of each UE can be randomly staggered, and multiple The UE simultaneously initiates measurement collisions that occur in the measurement.
  • the UE when the UE discovers the idle channel, the UE preempts the channel to prevent other UEs from occupying the channel, thereby avoiding resource allocation conflict.
  • the UE determines, according to the measured random quantity B and the measurement duration T, that the UE is at the time
  • the specific manner of measuring the start time on the frequency domain resource may include the following two types:
  • the product of B and T is used as the measurement start time at the corresponding time point on the time-frequency domain resource.
  • the UE uses the N1 time units after the start of the time domain resource given by the time-frequency domain resource as the measurement start time of the UE, and N1 is the product of the measured random quantity B and the measurement duration T, and the measurement start time that satisfies other UEs is T.
  • the random multiple of the measurement start time of the different UEs is completely staggered, so that the measurement start time of the UE is greater than or equal to the measurement end time of the previous UE, and the channel measurement times of different UEs do not overlap.
  • UE1 confirms that channel 2 is an idle channel. If there is no time point until the UE establishes a D2D connection, for example, the UE must initiate a D2D connection at the boundary of the subframe, then The UE will not initiate a D2D connection immediately. At this time, UE2 initiates channel measurement, and if channel 2 is considered to be an idle channel, it will also initiate a D2D connection at the subframe boundary, thereby still causing UE1 and UE2 to use the same resource conflict.
  • the UE1 needs to send a pre-occupied channel after the discovery channel is idle, preventing other UEs from occupying the channel. Then, the UE pre-occupies the channel to prevent other UEs from occupying the channel. If the channel is pre-occupied by transmitting a no-power signal, the channel pre-occupation is as shown in FIG. 6. If the regularly-identified signal is transmitted, the channel pre-occupation is as shown in FIG. 7, and the regular identification signal is a periodic characteristic signal. .
  • the UE uses the N2 time units after the start of the time domain resource given by the time-frequency domain resource as the measurement start time of the UE, and N2 is the measured random quantity B, and the random quantity B is a random number, so different UEs are used in this manner.
  • the measurement time is not completely staggered, and the channel measurement time of different UEs may overlap.
  • the UE1 needs to send a pre-occupied channel at the beginning of the next measurement time immediately after the discovery channel is idle.
  • the channel pre-occupation is as shown in FIG. 9. If the regularly-identified signal is transmitted, the channel pre-occupation is as shown in FIG. 10, and the regular identification signal is a periodic characteristic signal. .
  • the UE may also obtain a maximum number of relays of the D2D distributed network connection, so as to limit the number of relays used by the UE to establish a D2D connection on the channel. Equal to the maximum number of relays.
  • the maximum number of relays may be sent by the base station to the UE through broadcast signaling or other dedicated signaling, or may be a parameter pre-configured by the UE, or may be a parameter defined by the protocol, and the specific manner is not performed here. limited.
  • the UE obtains the maximum number of connections of the D2D distributed network connection before establishing the D2D distributed network connection, and the UE determines whether the number of D2D connections is greater than the maximum number of connections before establishing the D2D connection. If not greater, the UE establishes a D2D connection on the channel.
  • the maximum number of connections may be sent by the base station to the UE through broadcast signaling or other dedicated signaling, or may be a parameter pre-configured by the UE, or may be a parameter defined by the protocol, and the specific manner is not limited herein. .
  • the UE if the UE performs the measurement on the channel in the D2D distributed network networking mode controlled by the base station, the parameter will be reported according to the predefined measurement result.
  • the channel measurement result is reported to the base station.
  • the pre-defined measurement result reporting parameters include reporting time, reporting format, and the like.
  • a D2D communication method provided in an embodiment of the present invention includes:
  • the base station sends a D2D distributed network data transmission request to the UE.
  • the UE establishes a D2D multi-hop connection, which may be triggered by the base station.
  • the base station When triggered by the base station, the base station sends a data transmission request of the D2D distributed network to the UE, thereby triggering the UE to perform channel measurement and establishing a D2D multi-hop connection.
  • the base station sends a time-frequency domain resource for performing channel measurement to the UE.
  • the base station sends a time-frequency domain resource for performing channel measurement to the UE, where the frequency domain range of the time-frequency domain resource is divided into multiple channels, and the UE measures one of the channels to determine whether the channel is idle. If idle, the D2D is established on the channel. connection.
  • the data transmission request of the base station to the D2D distributed network and the time-frequency domain resource for transmitting the channel measurement to the UE may be sent to the UE through the same signaling, or may be sent to the UE through different signaling.
  • the UE is not limited herein.
  • the base station in the process of establishing a D2D multi-hop connection by the UE, sends a data transmission request of the D2D distributed network to the UE to trigger the UE to perform channel measurement, and the base station sends the time-frequency domain resource for channel measurement to the UE.
  • the time-frequency domain resource is used to enable the UE to measure the channel where the time-frequency domain resource is located to determine whether the channel is idle. If idle, establish a D2D connection through the channel.
  • the invention proposes a resource allocation process based on a D2D distributed network, which can realize resource allocation in a D2D multi-hop data transmission scenario based on a D2D distributed network.
  • the frequency domain range actually includes a frequency domain range and a time domain range
  • the time domain range includes a measurement dedicated subframe, or a time interval of abnormal data transmission indicated by the parameter.
  • the base station sends the measurement random quantity B and the measurement duration T to the UE, and the measurement random quantity B and the measurement duration T are used to enable the UE to determine the measurement start time on the time-frequency domain resource, and Beginning at the beginning of time, the channel is measured over the measurement duration T to determine if the channel is idle.
  • the base station further sends the maximum number of relays of the D2D distributed network connection to the UE, where the maximum number of relays is used to limit the number of relays used by the UE to establish a D2D connection on the channel, which should be less than or equal to The maximum number of relays.
  • the base station sends the maximum number of connections of the D2D distributed network connection to the UE, where the maximum number of connections is used to enable the UE to establish a D2D on the channel when determining that the number of D2D connections of the UE is not greater than the maximum number of connections. connection.
  • the base station further sends a measurement result reporting parameter to the UE, to define a format in which the UE reports the measurement result to the base station.
  • the parameters of the measurement time-frequency domain resource, the measurement random number B, the measurement duration T, the maximum number of relays, and the maximum number of connections sent by the base station to the UE may be simultaneously sent to the UE in one signaling, or may be divided into different The signaling is sent, which is not limited herein.
  • the above is an introduction to the D2D communication method in the D2D distributed network.
  • the user equipment UE and the base station in the D2D communication are introduced from the perspective of the functional module entity.
  • a user equipment provided by an embodiment of the present invention includes:
  • the first obtaining module 1201 is configured to acquire a D2D distributed network data transmission request.
  • the second obtaining module 1202 is configured to acquire a time-frequency domain resource for performing channel measurement.
  • the measuring module 1203 is configured to: after the first obtaining module 1201 obtains the D2D distributed network data transmission request, perform measurement on one of the channels in which the time-frequency domain resource is located to determine whether the channel is idle;
  • the connection establishing module 1204 is configured to establish a D2D connection on the channel when the channel is idle.
  • the second obtaining module 1202 acquires the time-frequency domain resource for performing channel measurement, and the measuring module 1203 then selects the channel where the time-frequency domain resource is located. A measurement is made to determine if the channel is idle, and if the channel is idle, the connection establishment module 1204 establishes a D2D connection over the channel.
  • the invention proposes a resource allocation process based on a D2D distributed network, which can realize resource allocation in a D2D multi-hop data transmission scenario based on a D2D distributed network.
  • the second acquisition module 1202 is specifically configured to obtain a frequency domain range and a time domain range for performing channel measurement; the time domain range includes a measurement-specific subframe specified by the base station; or, the time domain range includes a silent period of normal data transmission and reception learned according to the configuration of the base station.
  • an embodiment of the present invention provides a user equipment 13, which includes:
  • the first obtaining module 1301 is configured to acquire a D2D distributed network data transmission request.
  • the second obtaining module 1302 is configured to acquire a time-frequency domain resource for performing channel measurement.
  • the measuring module 1303 is configured to: after the first acquiring module 1301 obtains the D2D distributed network data transmission request, perform measurement on one of the channels in which the time-frequency domain resource is located to determine whether the channel is idle;
  • the connection establishing module 1304 is configured to establish a D2D connection on the channel when the channel is idle.
  • the measurement module 1303 includes:
  • the calculating unit 13031 is configured to calculate a sum of powers of signals of different signal sources on the channel;
  • the first determining unit 13032 is configured to determine that the channel is an idle channel when the sum of the powers is less than a preset threshold.
  • the measuring module 1303 is specifically configured to determine that the channel is not idle when the UE detects a regular landmark signal on the channel.
  • the measurement module 1303 performs a preset threshold M measurement on the channel. If the results of the M measurements are all idle, the UE confirms that the channel is idle, and the M measurements are discontinuous measurement or continuity measurement.
  • the measurement module 1303 is further configured to jump to the next channel for measurement when the channel is not idle or to perform measurement on the channel again after the preset measurement avoidance time.
  • the measurement module 1303 determines whether the measurement channel is idle by calculating whether the sum of powers of different signals on the channel is less than a preset threshold, or determining whether the channel is idle by detecting whether the channel has a regular iconic signal, thereby Improve the achievability of the program.
  • a user equipment 14 includes:
  • the first obtaining module 1401 is configured to acquire a D2D distributed network data transmission request.
  • the second obtaining module 1402 is configured to acquire a time-frequency domain resource for performing channel measurement.
  • the measuring module 1403 is configured to: after the first obtaining module 1401 obtains the D2D distributed network data transmission request, perform measurement on one of the channels in which the time-frequency domain resource is located to determine whether the channel is idle;
  • the connection establishing module 1404 is configured to establish a D2D connection on the channel when the channel is idle.
  • the user equipment 14 further includes:
  • the processing module 1405 is configured to pre-empt the channel when the channel is idle, and the pre-occupied channel is a non-idle channel;
  • the connection establishing module 1404 is specifically configured to establish a D2D connection through the channel when a time point of establishing the D2D connection is reached.
  • the user equipment further includes:
  • a third obtaining module 1406, configured to acquire a measurement random quantity B and a measurement duration T;
  • the measurement module 1403 includes:
  • a second determining unit 14031 configured to determine, according to the measured random quantity B and the measurement duration T, a measurement start time of the UE;
  • the measuring unit 14032 is configured to measure the channel within the measurement duration T from the measurement start time to determine whether the channel is idle.
  • the third acquisition module 1406 obtains the measurement random quantity B and the measurement duration T to determine the measurement start time on the channel where the frequency domain resource is located during the channel measurement, so that the measurement access of each UE can be randomly staggered. Time, avoiding measurement conflicts in which multiple UEs simultaneously initiate measurement. And when the processing module 1405 discovers the idle channel, the channel is pre-occupied to prevent other UEs from occupying the channel, thereby avoiding resource allocation conflicts.
  • the user equipment further includes:
  • a fourth acquiring module configured to acquire a maximum number of relays of the D2D distributed network connection
  • the connection establishment module is specifically configured to establish a D2D connection on the channel, and the number of relays used by the D2D connection is less than or equal to the maximum number of relays.
  • the user equipment further includes:
  • a fifth obtaining module configured to obtain a maximum number of connections of the D2D distributed network connection
  • Connection establishment module including:
  • a determining unit configured to determine whether the number of D2D connections is greater than a maximum number of connections
  • the connecting unit is configured to determine, when the determining unit determines that the number of D2D connections is not greater than the maximum number of connections, establishing a D2D connection on the channel.
  • the base station in the embodiment of the present invention is described in detail below from the perspective of a modular functional entity.
  • a base station 15 provided in an embodiment of the present invention includes:
  • the first sending module 1501 is configured to initiate a data transmission request of the D2D distributed network to the UE;
  • the second sending module 1502 is configured to send, to the UE, a time-frequency domain resource for performing channel measurement, where the time-frequency domain resource is used to enable the UE to measure a channel where the time-frequency domain resource is located to determine whether the channel is idle, and if the channel is idle, pass The channel establishes a D2D connection.
  • the first sending module 1501 sends a data transmission request of the D2D distributed network to the UE by the base station to trigger the UE to perform channel measurement
  • the second sending module 1502 sends the UE to the UE.
  • transmitting a time-frequency domain resource for performing channel measurement where the time-frequency domain resource is used to enable the UE to measure the channel where the time-frequency domain resource is located to determine whether the channel is idle, and if idle, establish a D2D connection through the channel.
  • the invention proposes a resource allocation process based on a D2D distributed network, which can realize resource allocation in a D2D multi-hop data transmission scenario based on a D2D distributed network.
  • the first sending module 1502 is specifically configured to send, to the UE, a frequency domain range and a time domain range for performing channel measurement; the time domain range includes a measurement dedicated subframe, or is sent by abnormal data indicated by the parameter. time interval.
  • the base station further includes:
  • a third sending module configured to send a measurement random quantity B and a measurement duration T to the UE, where the measurement random quantity B and the measurement duration T are used to enable the UE to determine a measurement start time on the time-frequency domain resource, and from the measurement start time Initially, the channel is measured over the measurement duration T to determine if the channel is idle.
  • the base station further includes:
  • a fourth sending module configured to send, to the UE, a maximum number of relays of the D2D distributed network connection, where the maximum number of relays is used to limit the number of relays used by the UE to establish a D2D connection on the channel should be less than or equal to The maximum number of relays.
  • the base station further includes:
  • the fifth sending module is configured to send the maximum number of connections of the D2D distributed network connection to the UE, where the maximum number of connections is used to enable the UE to establish a D2D connection on the channel when determining that the number of D2D connections of the UE is not greater than the maximum number of connections.
  • the disclosed system, 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 units 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 a software functional unit.
  • the integrated unit if implemented in the form of a software functional unit and sold or used as a standalone product, may be stored in a computer readable storage medium.
  • the technical solution of the present invention which is essential or contributes to the prior art, or all or part of the technical solution, may be embodied in the form of a software product stored in a storage medium.
  • Including a number of instructions for causing a computer device (which may be a personal computer, server, or network device, etc.) to perform all or part of the steps of the various embodiments of the present invention.
  • the foregoing storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk, and the like. .

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Abstract

本发明实施例公开了一种D2D通信方法、用户设备及基站，用于实现D2D分布式网络的资源分配，实现信道的高效利用。本发明实施例方法包括：UE获取到D2D分布式网络数据传输请求，获取进行信道测量的时频域资源，再对该时频域资源所在的信道进行测量以确定信道是否空闲，若信道空闲，则通过该信道建立D2D连接。本发明提出了基于D2D分布式网络下的资源分配流程，能够实现基于D2D分布式网络的D2D多跳数据传输场景下的资源分配。

Description

D2D通信方法、用户设备及基站 技术领域
本发明涉及无线通信领域，尤其涉及一种D2D通信方法、用户设备及基站。
背景技术
设备到设备(Device to Device，D2D)通信技术指用户设备(UE，User Equipment)之间通过复用蜂窝小区的频谱资源，直接进行通信，而不用像传统通信业务那样，先由源终端把信号发送给基站，再由基站转发给目的终端。因此，D2D通信能够更高效率的利用频谱资源，提高蜂窝网容量。
D2D多跳数据传输是基于D2D的分布式网络，将中继技术引入D2D通信系统，D2D分布式网络中的某一特定D2D UE具备多个D2D连接。从而能够进一步增大网络容量，提高频谱利用率，降低系统故障率，改善系统性能和用户体验。
目前3GPP协议尚未考虑基于D2D的多跳数据传输场景，在此场景下，无论是基站分配模式还是自选择的资源分配方式都有其无法避免的弊端。
发明内容
本发明实施例提供了一种D2D通信方法、用户设备及基站，能够实现D2D分布式网络的资源分配，实现信道的高效利用。
第一方面，本发明实施例提供了一种D2D通信方法，包括：
UE获取D2D分布式网络数据传输请求；UE获取进行信道测量的时频域资源；UE在获取D2D分布式网络数据传输请求后，对时频域资源所在的其中一个信道进行测量以确定信道是否空闲；若信道空闲，则UE在信道建立D2D连接。
结合第一方面，在第一方面的第一种可能的实现方式中，UE获取进行信道测量的时频域资源包括：UE获取进行信道测量的频域范围和时域范围；时域范围包括基站指定的测量专用子帧；或，时域范围包括根据基站配置获知的正常数据发送和接收的静默期。
结合第一方面，在第一方面的第二种可能的实现方式中，UE对时频域资源所在的其中一个信道进行测量以确定信道是否空闲包括：UE计算信道上不同信号源的信号的功率总和；若功率总和小于预设阈值，则UE确定信道为空闲信道。
结合第一方面，在第一方面的第三种可能的实现方式中，UE对时频域资源所在的其中一个信道进行测量以确定信道是否空闲包括：当UE在信道上检测到有规律的标志性信号时，UE确定信道非空闲。
结合第一方面的第二种可能的实现方式或第一方面的第三种可能的实现方式，在第一方面的第四种可能的实现方式中，UE对信道进行预设阈值M次测量，若M次测量的结果均为空闲，则UE确认信道空闲，M次测量为非连续性测量或连续性测量。
结合第一方面或第一方面的第一种可能的实现方式，在第一方面的第五种可能的实现方式中，若信道非空闲，则UE跳转到下一个信道进行测量或在预设的测量避让时间之后重新在信道进行测量。
结合第一方面或第一方面的第一种可能的实现方式，在第一方面的第六种可能的实现方式中，若信道空闲，则UE预占用信道，预占用的信道为非空闲信道；UE通过信道建立D2D连接包括：当到达建立D2D连接的时间点时，UE通过信道建立D2D连接。
结合第一方面的第六种可能的实现方式，在第一方面的第七种可能的实现方式中，UE获取测量随机量B和测量时长T；UE对时频域资源所在的信道进行测量以确定信道是否空闲包括：UE根据测量随机量B和测量时长T确定UE的测量起始时间；UE从测量起始时间开始，在测量时长T内对信道进行测量以确定信道是否空闲。
结合第一方面或第一方面的第一种可能的实现方式，在第一方面的第八种可能的实现方式中，UE获取D2D分布式网络连接的最大中继数；UE在信道建立D2D连接包括：UE在信道上建立D2D连接，D2D连接所使用的中继数小于或等于最大中继数。
结合第一方面或第一方面的第一种可能的实现方式，在第一方面的第九种可能的实现方式中，UE获取D2D分布式网络连接的最大连接数；UE在 信道建立D2D连接包括：UE判断自身的D2D连接数是否大于最大连接数，若不大于，则UE在信道上建立D2D连接。
第二方面，本发明实施例提供了一种D2D通信方法，包括：
基站向UE发起D2D分布式网络的数据传输请求；基站向UE发送进行信道测量的时频域资源，时频域资源用于使UE对时频域资源所在的信道进行测量以确定信道是否空闲，若信道空闲，则通过信道建立D2D连接。
结合第二方面，在第二方面的第一种可能的实现方式中，基站向UE发送进行信道测量的时频域资源包括：基站向UE发送进行信道测量的频域范围和时域范围；时域范围包括测量专用子帧，或通过参数指示的非正常数据发送的时间间隔。
结合第二方面，或第二方面的第一种可能的实现方式，在第二方面的第二种可能的实现方式中，基站向UE发送测量随机量B和测量时长T，测量随机量B和测量时长T用于使UE确定在时频域资源上的测量起始时间，并从测量起始时间开始，在测量时长T内对信道进行测量以确定信道是否空闲。
结合第二方面，或第二方面的第一种可能的实现方式，在第二方面的第三种可能的实现方式中，基站向UE发送D2D分布式网络连接的最大中继数，最大中继数用于限制UE在信道上建立D2D连接时使用的中继数应小于或等于最大中继数。
结合第二方面，或第二方面的第一种可能的实现方式，在第二方面的第四种可能的实现方式中，基站向UE发送D2D分布式网络连接的最大连接数，最大连接数用于使UE在确定自身的D2D连接数不大于最大连接数时，在信道上建立D2D连接。
第三方面，本发明实施例提供了一种用户设备，包括：
第一获取模块，用于获取D2D分布式网络数据传输请求；第二获取模块，用于获取进行信道测量的时频域资源；测量模块，用于在第一获取模块获取D2D分布式网络数据传输请求后，对时频域资源所在的其中一个信道进行测量以确定信道是否空闲；连接建立模块，用于当信道空闲时，在信道建立D2D连接。
结合第三方面，在第三方面的第一种可能的实现方式中，第二获取模块， 具体用于获取进行信道测量的频域范围和时域范围；时域范围包括基站指定的测量专用子帧；或，时域范围包括根据基站配置获知的正常数据发送和接收的静默期。
结合第三方面，在第三方面的第二种可能的实现方式中，测量模块包括：计算单元，用于计算信道上不同信号源的信号的功率总和；第一确定单元，用于当功率总和小于预设阈值时，确定信道为空闲信道。
结合第三方面，在第三方面的第三种可能的实现方式中，测量模块具体用于当UE在信道上检测到有规律的标志性信号时确定信道非空闲。
结合第三方面的第二种可能的实现方式或第三方面的第三种可能的实现方式，在第三方面的第四种可能的实现方式中，测量模块对信道进行预设阈值M次测量，若M次测量的结果均为空闲，则UE确认信道空闲，M次测量为非连续性测量或连续性测量。
结合第三方面或第三方面的第一种可能的实现方式，在第三方面的第五种可能的实现方式中，测量模块还用于当信道非空闲时，跳转到下一个信道进行测量或在预设的测量避让时间之后重新在信道进行测量。
结合第三方面或第三方面的第一种可能的实现方式，在第三方面的第六种可能的实现方式中，用户设备还包括：处理模块，用于当信道空闲时，预占用信道，预占用的信道为非空闲信道；连接建立模块，具体用于当到达建立D2D连接的时间点时，通过信道建立D2D连接。
结合第三方面的第六种可能的实现方式，在第三方面的第七种可能的实现方式中，用户设备还包括：第三获取模块，用于获取测量随机量B和测量时长T；测量模块包括：第二确定单元，用于根据测量随机量B和测量时长T确定UE的测量起始时间；测量单元，用于从测量起始时间开始，在测量时长T内对信道进行测量以确定信道是否空闲。
结合第三方面或第三方面的第一种可能的实现方式，在第三方面的第八种可能的实现方式中，用户设备还包括：
第四获取模块，用于获取D2D分布式网络连接的最大中继数；
连接建立模块，具体用于在信道上建立D2D连接，D2D连接所使用的中继数小于或等于最大中继数。
结合第三方面或第三方面的第一种可能的实现方式，在第三方面的第九种可能的实现方式中，用户设备还包括：
第五获取模块，用于获取D2D分布式网络连接的最大连接数；
连接建立模块，包括：
判断单元，用于判断D2D连接数是否大于最大连接数；
连接单元，用于判断单元确定D2D连接数不大于最大连接数时，则在信道上建立D2D连接。
第四方面，本发明实施例提供了一种基站，包括：
第一发送模块，用于向UE发起D2D分布式网络的数据传输请求；
第二发送模块，用于向UE发送进行信道测量的时频域资源，时频域资源用于使UE对时频域资源所在的信道进行测量以确定信道是否空闲，若信道空闲，则通过信道建立D2D连接。
结合第四方面，在第四方面的第一种可能的实现方式中，第一发送模块具体用于向UE发送进行信道测量的频域范围和时域范围；时域范围包括测量专用子帧，或通过参数指示的非正常数据发送的时间间隔。
结合第四方面，或第四方面的第一种可能的实现方式，在第四方面的第二种可能的实现方式中，基站还包括：
第三发送模块，用于向UE发送测量随机量B和测量时长T，测量随机量B和测量时长T用于使UE确定在时频域资源上的测量起始时间，并从测量起始时间开始，在测量时长T内对信道进行测量以确定信道是否空闲。
结合第四方面，或第四方面的第一种可能的实现方式，在第四方面的第三种可能的实现方式中，基站还包括：
第四发送模块，用于向UE发送D2D分布式网络连接的最大中继数，最大中继数用于限制UE在信道上建立D2D连接时使用的中继数应小于或等于最大中继数。
结合第四方面，或第四方面的第一种可能的实现方式，在第四方面的第四种可能的实现方式中，基站还包括：
第五发送模块，用于向UE发送D2D分布式网络连接的最大连接数，最大连接数用于使UE在确定自身的D2D连接数不大于最大连接数时，在信道 上建立D2D连接。
从以上技术方案可以看出，本发明实施例的方案具有如下有益效果：
本发明实施例中，UE获取到D2D分布式网络数据传输请求，获取进行信道测量的时频域资源，再对该时频域资源所在的信道进行测量以确定信道是否空闲，若信道空闲，则通过该信道建立D2D连接。本发明提出了基于D2D分布式网络下的资源分配流程，能够实现基于D2D分布式网络的D2D多跳数据传输场景下的资源分配。
附图说明
图1为本发明实施例中D2D分布式网络示意图；
图2为本发明实施例中D2D通信方法的一种流程图；
图3为本发明实施例中D2D通信方法的另一种流程图；
图4为本发明实施例中D2D通信方法的另一种流程图；
图5为本发明实施例中D2D通信的信道测量时间及测量间隔的一种示意图；
图6为本发明实施例中D2D通信的预占用信道的一种示意图；
图7为本发明实施例中D2D通信的预占用信道的另一种示意图；
图8为本发明实施例中D2D通信的信道测量时间及测量间隔的另一种示意图；
图9为本发明实施例中D2D通信的预占用信道的另一种示意图；
图10为本发明实施例中D2D通信的预占用信道的另一种示意图；
图11为本发明实施例中基站侧的D2D通信方法的一种流程图；
图12为本发明实施例中用户设备的功能模块示意图；
图13为本发明实施例中用户设备的另一功能模块示意图；
图14为本发明实施例中用户设备的另一功能模块示意图；
图15本发明实施例中基站的功能模块示意图。
具体实施方式
本发明实施例提供了一种D2D通信方法、用户设备及基站，用于XX。 下面分别进行详细说明。
为了使本技术领域的人员更好地理解本发明方案，下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本发明一部分的实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都应当属于本发明保护的范围。
本发明的说明书和权利要求书及上述附图中的术语“第一”、“第二”、“第三”“第四”等(如果存在)是用于区别类似的对象，而不必用于描述特定的顺序或先后次序。应该理解这样使用的数据在适当情况下可以互换，以便这里描述的实施例能够以除了在这里图示或描述的内容以外的顺序实施。此外，术语“包括”和“具有”以及他们的任何变形，意图在于覆盖不排他的包含，例如，包含了一系列步骤或单元的过程、方法、系统、产品或设备不必限于清楚地列出的那些步骤或单元，而是可包括没有清楚地列出的或对于这些过程、方法、产品或设备固有的其它步骤或单元。
D2D多跳数据传输是基于D2D的分布式网络，将中继技术引入D2D通信系统，使得D2D分布式网络中的某一特定D2D UE具备多个D2D连接，如图1D2D分布式网络示意图中所示，一个D2D UE可以支持多个D2D连接。
结合图2，本发明实施例提供了一种D2D通信的方法，包括：
201、UE获取D2D分布式网络数据传输请求；
在D2D分布式网络建网过程中，需要由基站或UE自身触发建网流程，UE获取到进行D2D分布式网络数据传输请求，如此UE才能开始建立D2D分布式网络的D2D连接。
具体的，如果是由基站触发的建网流程，则该D2D分布式网络数据传输请求是基站通过广播信令或无线资源控制(Radio Resource Control，RCC)发送给UE的；如果是由UE自身触发的建网流程，则该D2D分布式网络数据传输请求是从自身的应用层获取的，具体方式此处不做限定。
202、UE获取进行信道测量的时频域资源；
UE在建立基于分布式网络的D2D连接时，需要进行信道测量以找到空闲的信道，在进行信道测量时，UE需要先获取进行信道测量的时频域资源。
该时频域资源可以由基站发送给UE的时频域资源，也可以是由UE所在的服务小区的服务基站预配置或者UE自配置的时频域，具体此处不做限定。
需要说明的是，如果是基站向UE发送D2D分布式网络的数据传输请求和向UE发送进行信道测量的时频域资源，那这两者可以是通过同一个信令一起发送给UE的，也可以通过不同的信令发送给UE，具体此处不做限定。
203、UE在获取D2D分布式网络数据传输请求后，对该时频域资源所在的其中一个信道进行测量以确定该信道是否空闲；
UE获取的时频域资源的频域范围划分为多个信道，UE在获取D2D分布式网络数据传输请求后，对该时频域资源所在的信道进行测量，以找到空闲的信道，具体测量时，是对其中的一个信道进行测量以确定该信道是否空闲。
204、若该信道空闲，则UE在该信道建立D2D连接。
UE对该信道进行测量后，当确定该信道为空闲信道时，UE在该信道上建立D2D连接。
本发明实施例中，UE获取到D2D分布式网络建网指令后，获取进行信道测量的时频域资源，再对该时频域资源所在的信道进行测量以确定信道是否空闲，若信道空闲，则通过该信道建立D2D连接。本发明提出了基于D2D分布式网络下的资源分配流程，能够实现基于D2D分布式网络的D2D多跳数据传输场景下的资源分配。
进一步，作为另一个实施例，在一种具体的实施中，UE获取的时频域资源包括时域范围和频域范围。
具体的，UE进行测量的频域范围可以是由基站通过广播信令或无线资源控制(Radio Resource Control，RCC)信令直接发送给UE的某些子信道，也可以是由基站给出用作D2D通信某个大的频域范围，由UE根据自身的需要对该频域资源进行划分形成多个子信道。
具体的，UE进行测量的时域范围可以是由基站通过广播信令或RCC信令发送的测量专用子帧，还可以是基站发送给UE一个配置参数，由UE根据配置参数获知通过UE正常数据发送和接收的静默期进行信道测量，静默期即正常数据发送的空闲时段，例如：多播/组播单频网络(Multimedia Broadcast multicast service Single Frequency Network，MBSFN)子帧或时分双 工(Time Division Duplexing，TDD)特殊子帧中的保护间隔(Guard period，GP)。
在实际应用中，对信道的空闲检测的方式可以是以信道上的信号功率总和进行判断，下面详细进行说明：
结合图3，本发明实施例提供了一种D2D通信方法，包括：
301、UE获取D2D分布式网络数据传输请求；
在D2D分布式网络建网过程中，需要由基站或UE自身触发建网流程，UE获取到进行D2D分布式网络数据传输请求，如此UE才能开始建立D2D分布式网络的D2D连接。
具体的，如果是由基站触发的建网流程，则该D2D分布式网络数据传输请求是基站通过广播信令或无线资源控制(Radio Resource Control，RCC)发送给UE的；如果是由UE自身触发的建网流程，则该D2D分布式网络数据传输请求是从自身的应用层获取的，具体方式此处不做限定。
302、UE获取进行信道测量的时频域资源；
UE在建立基于分布式网络的D2D连接时，需要进行信道测量以找到空闲的信道，在进行信道测量时，UE需要先获取进行信道测量的时频域资源。
该时频域资源可以由基站发送给UE的时频域资源，也可以是由UE所在的服务小区的服务基站预配置或者UE自配置的时频域，具体此处不做限定。
需要说明的是，如果是基站向UE发送D2D分布式网络的数据传输请求和向UE发送进行信道测量的时频域资源，那这两者可以是通过同一个信令一起发送给UE的，也可以通过不同的信令发送给UE，具体此处不做限定。
303、UE计算该时频域资源所在的其中一个信道上不同信号源的信号的功率总和；
UE获取的时频域资源中的频域范围划分为多个子信道，UE在获取D2D分布式网络数据传输请求后，对该时频域资源所在的信道进行测量，以找到空闲的信道，具体测量时，是对其中的一个信道进行测量以确定该信道是否空闲。
具体的测量方法为：UE计算该信道上不同信号源的信号的功率总和∑Rx，特别地,上述检测信道如果和当前UE所处工作频率不在同一频段时，可 由基站配置或UE自发配置measurement gap，在measurement gap时间内发起异频测量。
304、UE判断功率总和是否小于预设阈值以确定该信道为空闲信道；
若信道上不同信号源的信号的功率总和小于预设阈值，则UE确定信道为空闲信道，若大于或等于预设阈值，则UE确定该信道为非空闲信道。具体的，预设阈值可以是由基站通过测量参数下发的，也可以在UE的预配置参数中配置的。
在具体的实施中，为了避免短时间的信道空闲占用信道带来的干扰，在预置的时间内，UE对该信道进行多次测量，测量的次数为预设阈值M，若M次测量的结果均为空闲时，UE才认为该信道真正的空闲，需要说明的是，M次测量可以为非连续性测量，也可以为连续性的测量。
305、若信道空闲，则UE在信道建立D2D连接；
UE对该信道进行测量后，当确定该信道为空闲信道时，UE在该信道上建立D2D连接。
306、若信道非空闲，则UE跳转到下一个信道进行测量或在预设的测量避让时间之后重新在信道进行测量。
若UE检测到信道非空闲时，UE跳转到该时频域资源的下一个子信道进行测量，或者在预设的测量避让时间之后重新在该信道上进行测量。
在另一种具体的实施中，当UE在该信道上检测到有规律的标志性信号时，表示其他的UE已经预占用了该信道，则UE可以确定此信道为非空闲信道。
在本发明实施例中，UE可以通过计算信道上的不同信号的功率总和是否小于预设阈值来判断测量信道是否空闲，或通过检测信道是否有规律的标志性信号来判断信道是否空闲，从而提高了方案的可实现性。
进一步，在一种具体的实施中，有多个UE同时在一块时频域资源上进行信道的测量，为了避免多个UE间发生测量冲突，本发明实施例采用了预占用信道和随机接入测量时间机制。下面进行详细说明：
结合图4，本发明实施例提供了一种D2D通信方法，包括：
401、UE获取D2D分布式网络数据传输请求；
在D2D分布式网络建网过程中，需要由基站或UE自身触发建网流程，UE获取到进行D2D分布式网络数据传输请求，如此UE才能开始建立D2D分布式网络的D2D连接。
402、UE获取进行信道测量的时频域资源；
当UE需要建立基于分布式网络的D2D连接时，需要进行信道测量以找到空闲的信道，在进行信道测量时，UE需要先获取进行信道测量的时频域资源。
该时频域资源可以由基站发送给UE的时频域资源，也可以是由UE所在的服务小区的服务基站预配置或者UE自配置的时频域，具体此处不做限定。
该进行信道测量的时频域资源包括时域范围和频域范围，因此，UE实际是获取进行信道测量的时域范围和进行测量的频域范围。
具体的，UE进行测量的频域范围可以是由基站通过广播信令或无线资源控制(Radio Resource Control，RCC)信令直接发送给UE的某些子信道，也可以是由基站给出用作D2D通信某个大的频域范围，由UE根据自身的需要对该频域资源进行划分形成多个子信道。
具体的，UE进行测量的时域范围可以是由基站通过广播信令或RCC信令发送的测量专用子帧，还可以是基站发送给UE一个配置参数，由UE根据配置参数获知通过某正常数据发送和接收的静默期进行信道测量，静默期即正常数据发送的空闲时段，例如：多播/组播单频网络(Multimedia Broadcast multicast service Single Frequency Network，MBSFN)子帧或时分双工(Time Division Duplexing，TDD)特殊子帧中的保护间隔(Guard period，GP)。
403、UE获取测量随机量B和测量时长T；
当UE在进行信道测量时，为了避免D2D分布式网络节点在同一时刻进行信道测量而引起的测量冲突，UE获取测量随机量B，用来确定UE在发起信道测量的随机时间量，同时UE获取测量时长T，T为UE进行信道测量的持续测量时间。
需要说明的是，测量随机量B可以是由基站通过专用信令发送给UE的，也可以是UE自身确定的，还可以是由基站配置了一个随机量B池，UE 从该随机量B池中随机选择一个作为UE进行测量的随机量B。
测量时长T可以是基站通过广播信令发送给UE的，也可以是由协议规定的一个固定常量，还可以是UE自身预配置的，具体此处不做限定。
需要说明的是，测量随机量B、测量时长T和测量时频域资源如果都是由基站下发的，则可以是在一个信令中作为信道测量的参数进行下发，也可以通过不同的信令下发，具体方式此处不做限定。
404、UE根据测量随机量B和测量时长T确定UE在该时频域资源上的测量起始时间；
在UE获取测量随机量B和测量时长T后，根据测量随机量B和测量时长T确定UE在该时频域资源上的测量起始时间，以使得各UE在该时频域资源上的测量起始时间不相同，能够错开进行测量的时间。
405、UE从测量起始时间开始，在测量时长T内对该时频域所在的其中一个信道进行测量以确定该信道是否空闲；
UE在确定了测量起始时间后，从各自的测量起始时间开始，在测量时长T内对该时频域所在的其中一个信道进行测量以确定该信道是否空闲。
406、若该信道空闲，则UE预占用该信道；
UE对该信道进行测量后，当确定该信道为空闲信道时，则预占用该信道。具体是在该信道上发出预占用信号，该预占用信号可以是所在信道上发送的无规律功率信号，也可以是以有规律标识性信号，有规律标识性信号可以是固定了发送周期，发送持续时间，发送格式的特定信号。
407、当到达建立D2D连接的时间点时，UE在该信道建立D2D连接。
UE预占用该信道后，当达到UE建立D2D连接的时间点时，UE在该信道上建立D2D连接。
本发明实施例中，UE通过测量随机量B和测量时长T确定在信道测量时频域资源所在的信道上的测量起始时间，从而能够随机地错开各UE的测量接入时间，避免多个UE同时发起测量发生的测量冲突。
其次，本发明实施例中，UE在发现空闲信道时，通过预占用信道，防止其他UE占用该信道，从而能够避免资源分配冲突。
在具体的实施例中，UE根据测量随机量B和测量时长T确定UE在该时 频域资源上的测量起始时间的具体方式可以包括以下两种：
一、以B和T的乘积在所述时频域资源上相应的时间点作为测量起始时间。
UE将时频域资源给出的时域资源起始点之后N1个时间单位作为UE的测量起始时间，N1为测量随机量B与测量时长T的乘积，满足其他UE的测量起始时间是T的随机倍数，不同UE的测量发起时间完全错开，使得该UE的测量起始时间大于或等于上一个UE的测量结束时间，不同UE的信道测量时间不会重叠。
如图5所示，信道测量的频域范围包括3个子信道：信道1、信道2、信道3，假设：信道测量的时频域资源的时域资源起始点为t1，UE1的B为B1＝0，UE2的B为B2＝1，UE1和UE2的测量时间都为固定的时间T＝1ms，则UE1的测量起始时间为t1+B1*T＝t1，UE1的测量结束时间为t1+1ms，UE2的测量起始时间为t1+B2*T＝t1+1ms，UE2的测量结束时间为t1+2ms。所以UE1和UE2进行测量的时间不会重叠。
如图5所示，UE1在信道2上测量后，确认信道2为空闲信道，若此时还没有到UE建立D2D连接的时间点，例如UE必须在子帧的边界才能发起D2D连接，则此时UE不会马上发起D2D连接。此时UE2发起信道测量，任然认为信道2为空闲信道，则也会在子帧边界发起D2D连接，从而仍然会造成UE1和UE2使用相同资源的冲突。
因此，为了避免上述冲突，测量UE1需在发现信道空闲后，发出预占用信道，防止其他UE占用信道。则UE先预占用该信道，以防止其他UE占用该信道。若是通过发射无功率信号预占用信道，则信道预占用如图6所示，若是发射有规律标识性信号，则信道预占用如图7所示，该有规律标识性信号是周期性的特性信号。
二、以测量随机量B在所述时频域资源上相应的时间点作为测量起始时间。
UE将时频域资源给出的时域资源起始点之后N2个时间单位作为UE的测量起始时间，N2为测量随机量B，该随机量B为随机数，因此使用此种方式不同UE的测量时间并未完全错开，不同UE的信道测量时间有可能重叠。
如图8所示，信道测量的频域范围包括3个子信道：信道1、信道2、信道3，假设：信道测量的时频域资源的时域资源起始点为t1，UE1的B为B1＝0，UE2的B为B2＝0.5，UE1和UE2的测量时间都为固定的时间T＝1ms，则UE1的测量起始时间为t1+B1＝t1，UE1的测量结束时间为t1+1ms，UE2的测量起始时间为t1+B2＝t1+0.5ms，UE2的测量结束时间为t1+1.5ms，则在UE1还没测量结束时，UE2已经开始测量，所以，UE1和UE2的测量时间有重叠。
如图8所示，由于不同UE的测量时间并未要求完全错开，因此，不同UE的信道测量时间有可能重叠，可能导致不同UE在检测同一信道并同时得到信道空闲的冲突，因此，为了避免上述冲突，测量UE1需在发现信道空闲后，马上在下一个测量时间起始位置发出预占用信道。
若是通过发射无功率信号预占用信道，则信道预占用如图9所示，若是发射有规律标识性信号，则信道预占用如图10所示，该有规律标识性信号是周期性的特性信号。
进一步，作为另一个实施例，UE在建立D2D分布式网络连接前，还可以获取D2D分布式网络连接的最大中继数，以限制UE在信道上建立D2D连接时所使用的中继数小于或等于最大中继数。
需要说明的是，最大中继数可以是基站通过广播信令或其他专用信令下发给UE的，也可以是UE预配置的参数，还可以是协议定义的参数，具体方式此处不做限定。
进一步，作为另一个实施例，UE在建立D2D分布式网络连接前，还获取D2D分布式网络连接的最大连接数，UE在建立D2D连接之前，先判断自身的D2D连接数是否大于最大连接数，若不大于，则UE在信道上建立D2D连接。
需要说明的是，最大连接数可以是基站通过广播信令或其他专用信令下发给UE的，也可以是UE预配置的参数，还可以是协议定义的参数，具体方式此处不做限定。
进一步，作为另一个实施例，若在基站控制的D2D分布式网络建网模式下，UE在对信道进行测量后，将按照预先定义的测量结果上报参数要求， 向基站上报信道测量结果。具体的，预先定义的测量结果上报参数包括上报时间，上报格式等。
以上是从UE侧对本发明实施例中的D2D通信进行介绍，下面从基站侧对本发明实施中的D2D通信进行介绍。
结合图11，本发明实施例中提供的一种D2D通信方法，包括：
1101、基站向UE发送D2D分布式网络数据传输请求；
UE建立D2D多跳连接可以是由基站触发的，当由基站触发时，基站向UE发送D2D分布式网络的数据传输请求，从而触发UE进行信道测量，建立D2D多跳连接。
1102、基站向UE发送进行信道测量的时频域资源。
基站向UE发送进行信道测量的时频域资源，该时频域资源的频域范围划分为多个信道，UE对其中一个信道进行测量以确定信道是否空闲，若空闲，则在该信道建立D2D连接。
需要说明的是，基站向UE发送D2D分布式网络的数据传输请求和向UE发送进行信道测量的时频域资源可以是通过同一个信令一起发送给UE，也可以通过不同的信令发送给UE，具体此处不做限定。
本发明实施例中，在UE建立D2D多跳连接的过程中，由基站向UE发送D2D分布式网络的数据传输请求，以触发UE进行信道测量，基站向UE发送进行信道测量的时频域资源，该时频域资源用于使UE对该时频域资源所在的信道进行测量以确定信道是否空闲，若空闲，则通过信道建立D2D连接。本发明提出了基于D2D分布式网络下的资源分配流程，能够实现基于D2D分布式网络的D2D多跳数据传输场景下的资源分配。
进一步，作为另一个实施例，基站向UE发送进行信道测量时频域范围实际包括频域范围和时域范围，时域范围包括测量专用子帧，或通过参数指示的非正常数据发送的时间间隔。
进一步，作为另一个实施例，基站向UE发送测量随机量B和测量时长T，测量随机量B和测量时长T用于使UE确定在时频域资源上的测量起始时间，并从测量起始时间开始，在测量时长T内对信道进行测量以确定信道是否空闲。
可选的，作为另一个实施例，基站还向UE发送D2D分布式网络连接的最大中继数，最大中继数用于限制UE在信道上建立D2D连接时使用的中继数应小于或等于最大中继数。
可选的，作为另一个实施例，基站向UE发送D2D分布式网络连接的最大连接数，最大连接数用于使UE在确定自身的D2D连接数不大于最大连接数时，在信道上建立D2D连接。
可选的，作为另一个实施例，基站还向UE发送测量结果上报参数，以定义UE向基站上报测量结果的格式。
需要说明的是，基站向UE发送的测量时频域资源、测量随机数B、测量时长T、最大中继数、最大连接数等参数可以在一个信令中同时发送给UE，也可以分成不同的信令进行发送，具体此处不做限定。
以上是对D2D分布式网络中的D2D通信方法进行的介绍，下面从功能模块实体角度对D2D通信中的用户设备UE及基站进行介绍。
结合图12，本发明实施例提供的一种用户设备，包括：
第一获取模块1201，用于获取D2D分布式网络数据传输请求；
第二获取模块1202，用于获取进行信道测量的时频域资源；
测量模块1203，用于在第一获取模块1201获取D2D分布式网络数据传输请求后，对时频域资源所在的其中一个信道进行测量以确定信道是否空闲；
连接建立模块1204，用于当信道空闲时，在信道建立D2D连接。
本发明实施例用户设备12的各单元之间的交互过程可以参阅前述图2所示实施例中的交互过程，具体此处不再赘述。
本发明实施例中，第一获取模块1201获取到D2D分布式网络建网指令后，第二获取模块1202获取进行信道测量的时频域资源，测量模块1203再对该时频域资源所在的信道进行测量以确定信道是否空闲，若信道空闲，连接建立模块1204通过该信道建立D2D连接。本发明提出了基于D2D分布式网络下的资源分配流程，能够实现基于D2D分布式网络的D2D多跳数据传输场景下的资源分配。
进一步，作为另一个实施例，在一种具体的实施中，第二获取模块 1202，具体用于获取进行信道测量的频域范围和时域范围；时域范围包括基站指定的测量专用子帧；或，时域范围包括根据基站配置获知的正常数据发送和接收的静默期。
结合图13，本发明实施例提供了一种用户设备13，包括：
第一获取模块1301，用于获取D2D分布式网络数据传输请求；
第二获取模块1302，用于获取进行信道测量的时频域资源；
测量模块1303，用于在第一获取模块1301获取D2D分布式网络数据传输请求后，对时频域资源所在的其中一个信道进行测量以确定信道是否空闲；
连接建立模块1304，用于当信道空闲时，在信道建立D2D连接。
其中，测量模块1303包括：
计算单元13031，用于计算信道上不同信号源的信号的功率总和；
第一确定单元13032，用于当功率总和小于预设阈值时，确定信道为空闲信道。
或，测量模块1303具体用于当UE在信道上检测到有规律的标志性信号时确定信道非空闲。
另外，测量模块1303对信道进行预设阈值M次测量，若M次测量的结果均为空闲，则UE确认信道空闲，M次测量为非连续性测量或连续性测量。
测量模块1303还用于当信道非空闲时，跳转到下一个信道进行测量或在预设的测量避让时间之后重新在信道进行测量。
本发明实施例用户设备13的各单元之间的交互过程可以参阅前述图3所示实施例中的交互过程，具体此处不再赘述。
在本发明实施例中，测量模块1303通过计算信道上的不同信号的功率总和是否小于预设阈值来判断测量信道是否空闲，或通过检测信道是否有规律的标志性信号来判断信道是否空闲，从而提高了方案的可实现性。
结合图14，本发明实施例提供的一种用户设备14，包括：
第一获取模块1401，用于获取D2D分布式网络数据传输请求；
第二获取模块1402，用于获取进行信道测量的时频域资源；
测量模块1403，用于在第一获取模块1401获取D2D分布式网络数据传输请求后，对时频域资源所在的其中一个信道进行测量以确定信道是否空闲；
连接建立模块1404，用于当信道空闲时，在信道建立D2D连接。
另外，用户设备14还包括：
处理模块1405，用于当信道空闲时，预占用信道，预占用的信道为非空闲信道；
连接建立模块1404，具体用于当到达建立D2D连接的时间点时，通过信道建立D2D连接。
另外，用户设备还包括：
第三获取模块1406，用于获取测量随机量B和测量时长T；
测量模块1403包括：
第二确定单元14031，用于根据测量随机量B和测量时长T确定UE的测量起始时间；
测量单元14032，用于从测量起始时间开始，在测量时长T内对信道进行测量以确定信道是否空闲。
本发明实施例用户设备14的各单元之间的交互过程可以参阅前述图4所示实施例中的交互过程，具体此处不再赘述。
本发明实施例中，通过第三获取模块1406获取测量随机量B和测量时长T确定在信道测量时频域资源所在的信道上的测量起始时间，从而能够随机地错开各UE的测量接入时间，避免多个UE同时发起测量发生的测量冲突。并且处理模块1405在发现空闲信道时，预占用信道，防止其他UE占用该信道，从而能够避免资源分配冲突。
可选的，作为另一个实施例，用户设备还包括：
第四获取模块，用于获取D2D分布式网络连接的最大中继数；
连接建立模块，具体用于在信道上建立D2D连接，D2D连接所使用的中继数小于或等于最大中继数。
可选的，作为另一个实施例，用户设备还包括：
第五获取模块，用于获取D2D分布式网络连接的最大连接数；
连接建立模块，包括：
判断单元，用于判断D2D连接数是否大于最大连接数；
连接单元，用于判断单元确定D2D连接数不大于最大连接数时，则在信道上建立D2D连接。
下面从模块化功能实体角度对本发明实施例中的基站进行详细介绍。
结合图15，本发明实施例中提供的一种基站15，包括：
第一发送模块1501，用于向UE发起D2D分布式网络的数据传输请求；
第二发送模块1502，用于向UE发送进行信道测量的时频域资源，时频域资源用于使UE对时频域资源所在的信道进行测量以确定信道是否空闲，若信道空闲，则通过信道建立D2D连接。
本发明实施例基站15的各单元之间的交互过程可以参阅前述图11所示实施例中的交互过程，具体此处不再赘述。
本发明实施例中，在UE建立D2D多跳连接的过程中，第一发送模块1501由基站向UE发送D2D分布式网络的数据传输请求，以触发UE进行信道测量，第二发送模块1502向UE发送进行信道测量的时频域资源，该时频域资源用于使UE对该时频域资源所在的信道进行测量以确定信道是否空闲，若空闲，则通过信道建立D2D连接。本发明提出了基于D2D分布式网络下的资源分配流程，能够实现基于D2D分布式网络的D2D多跳数据传输场景下的资源分配。
进一步，作为另一个实施例，第一发送模块1502具体用于向UE发送进行信道测量的频域范围和时域范围；时域范围包括测量专用子帧，或通过参数指示的非正常数据发送的时间间隔。
进一步，作为另一个实施例，基站还包括：
第三发送模块，用于向UE发送测量随机量B和测量时长T，测量随机量B和测量时长T用于使UE确定在时频域资源上的测量起始时间，并从测量起始时间开始，在测量时长T内对信道进行测量以确定信道是否空闲。
进一步，作为另一个实施例，基站还包括：
第四发送模块，用于向UE发送D2D分布式网络连接的最大中继数，最大中继数用于限制UE在信道上建立D2D连接时使用的中继数应小于或等于 最大中继数。
进一步，作为另一个实施例，基站还包括：
第五发送模块，用于向UE发送D2D分布式网络连接的最大连接数，最大连接数用于使UE在确定自身的D2D连接数不大于最大连接数时，在信道上建立D2D连接。
所属领域的技术人员可以清楚地了解到，为描述的方便和简洁，上述描述的系统，装置和单元的具体工作过程，可以参考前述方法实施例中的对应过程，在此不再赘述。
在本申请所提供的几个实施例中，应该理解到，所揭露的系统，装置和方法，可以通过其它的方式实现。例如，以上所描述的装置实施例仅仅是示意性的，例如，所述单元的划分，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式，例如多个单元或组件可以结合或者可以集成到另一个系统，或一些特征可以忽略，或不执行。另一点，所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口，装置或单元的间接耦合或通信连接，可以是电性，机械或其它的形式。
所述作为分离部件说明的单元可以是或者也可以不是物理上分开的，作为单元显示的部件可以是或者也可以不是物理单元，即可以位于一个地方，或者也可以分布到多个网络单元上。可以根据实际的需要选择其中的部分或者全部单元来实现本实施例方案的目的。
另外，在本发明各个实施例中的各功能单元可以集成在一个处理单元中，也可以是各个单元单独物理存在，也可以两个或两个以上单元集成在一个单元中。上述集成的单元既可以采用硬件的形式实现，也可以采用软件功能单元的形式实现。
所述集成的单元如果以软件功能单元的形式实现并作为独立的产品销售或使用时，可以存储在一个计算机可读取存储介质中。基于这样的理解，本发明的技术方案本质上或者说对现有技术做出贡献的部分或者该技术方案的全部或部分可以以软件产品的形式体现出来，该计算机软件产品存储在一个存储介质中，包括若干指令用以使得一台计算机设备(可以是个人计算机，服务器，或者网络设备等)执行本发明各个实施例所述方法的全部或部分步 骤。而前述的存储介质包括：U盘、移动硬盘、只读存储器(ROM，Read-Only Memory)、随机存取存储器(RAM，Random Access Memory)、磁碟或者光盘等各种可以存储程序代码的介质。
以上所述，以上实施例仅用以说明本发明的技术方案，而非对其限制；尽管参照前述实施例对本发明进行了详细的说明，本领域的普通技术人员应当理解：其依然可以对前述各实施例所记载的技术方案进行修改，或者对其中部分技术特征进行等同替换；而这些修改或者替换，并不使相应技术方案的本质脱离本发明各实施例技术方案的精神和范围。

Claims (30)

  1. 一种D2D通信方法，其特征在于，包括：
    UE获取D2D分布式网络数据传输请求；
    所述UE获取进行信道测量的时频域资源；
    所述UE在获取所述D2D分布式网络数据传输请求后，对所述时频域资源所在的其中一个信道进行测量以确定所述信道是否空闲；
    若所述信道空闲，则所述UE在所述信道建立D2D连接。
  2. 根据权利要求1所述的方法，其特征在于，所述UE获取进行信道测量的时频域资源包括：
    所述UE获取进行信道测量的频域范围和时域范围；
    所述时域范围包括基站指定的测量专用子帧；
    或，所述时域范围包括根据基站配置获知的正常数据发送和接收的静默期。
  3. 根据权利要求1所述的方法，其特征在于，所述UE对所述时频域资源所在的其中一个信道进行测量以确定所述信道是否空闲包括：
    所述UE计算所述信道上不同信号源的信号的功率总和；
    若所述功率总和小于预设阈值，则所述UE确定所述信道为空闲信道。
  4. 根据权利要求1所述的方法，其特征在于，所述UE对所述时频域资源所在的其中一个信道进行测量以确定所述信道是否空闲包括：
    当所述UE在所述信道上检测到有规律的标志性信号时，所述UE确定所述信道非空闲。
  5. 根据权利要求3或4所述的方法，其特征在于，所述UE对所述信道进行预设阈值M次测量，若所述M次测量的结果均为空闲，则所述UE确认所述信道空闲，所述M次测量为非连续性测量或连续性测量。
  6. 根据权利要求1或2所述的方法，其特征在于，所述方法还包括：
    若所述信道非空闲，则所述UE跳转到下一个信道进行测量或在预设的测量避让时间之后重新在所述信道进行测量。
  7. 根据权利要求1或2所述的方法，其特征在于，所述方法还包括：
    若所述信道空闲，则所述UE预占用所述信道，预占用的信道为非空闲信道；
    所述UE通过所述信道建立D2D连接包括：
    当到达建立D2D连接的时间点时，所述UE通过所述信道建立D2D连接。
  8. 根据权利要求7所述的方法，其特征在于，所述方法还包括：
    所述UE获取测量随机量B和测量时长T；
    所述UE对所述时频域资源所在的信道进行测量以确定所述信道是否空闲包括：
    所述UE根据所述测量随机量B和测量时长T确定所述UE的测量起始时间；
    所述UE从所述测量起始时间开始，在所述测量时长T内对所述信道进行测量以确定所述信道是否空闲。
  9. 根据权利要求1或2所述的方法，其特征在于，所述方法还包括：
    所述UE获取D2D分布式网络连接的最大中继数；
    所述UE在所述信道建立D2D连接包括：
    所述UE在所述信道上建立D2D连接，所述D2D连接所使用的中继数小于或等于所述最大中继数。
  10. 根据权利要求1或2所述的方法，其特征在于，所述方法还包括：
    所述UE获取D2D分布式网络连接的最大连接数；
    所述UE在所述信道建立D2D连接包括：
    所述UE判断自身的D2D连接数是否大于所述最大连接数，若不大于，则所述UE在所述信道上建立D2D连接。
  11. 一种D2D通信方法，其特征在于，包括：
    基站向UE发起D2D分布式网络的数据传输请求；
    基站向所述UE发送进行信道测量的时频域资源，所述时频域资源用于使所述UE对所述时频域资源所在的信道进行测量以确定所述信道是否空闲，若所述信道空闲，则通过所述信道建立D2D连接。
  12. 根据权利要求11所述的方法，其特征在于，基站向UE发送进行信道测量的时频域资源包括：
    所述基站向所述UE发送进行信道测量的频域范围和时域范围；
    所述时域范围包括测量专用子帧，或通过参数指示的非正常数据发送的 时间间隔。
  13. 根据权利要求11或12所述的方法，其特征在于，所述方法还包括：
    所述基站向所述UE发送测量随机量B和测量时长T，所述测量随机量B和测量时长T用于使所述UE确定在所述时频域资源上的测量起始时间，并从所述测量起始时间开始，在所述测量时长T内对所述信道进行测量以确定所述信道是否空闲。
  14. 根据权利要求11或12所述的方法，其特征在于，所述方法还包括：
    所述基站向所述UE发送D2D分布式网络连接的最大中继数，所述最大中继数用于限制所述UE在所述信道上建立D2D连接时使用的中继数应小于或等于所述最大中继数。
  15. 根据权利要求11或12所述的方法，其特征在于，所述方法还包括：
    所述基站向所述UE发送D2D分布式网络连接的最大连接数，所述最大连接数用于使所述UE在确定自身的D2D连接数不大于所述最大连接数时，在所述信道上建立D2D连接。
  16. 一种用户设备，其特征在于，包括：
    第一获取模块，用于获取D2D分布式网络数据传输请求；
    第二获取模块，用于获取进行信道测量的时频域资源；
    测量模块，用于在第一获取模块获取所述D2D分布式网络数据传输请求后，对所述时频域资源所在的其中一个信道进行测量以确定所述信道是否空闲；
    连接建立模块，用于当所述信道空闲时，在所述信道建立D2D连接。
  17. 根据权利要求16所述的用户设备，其特征在于：
    所述第二获取模块，具体用于获取进行信道测量的频域范围和时域范围；
    所述时域范围包括基站指定的测量专用子帧；
    或，所述时域范围包括根据基站配置获知的正常数据发送和接收的静默期。
  18. 根据权利要求16所述的用户设备，其特征在于，所述测量模块包括：
    计算单元，用于计算所述信道上不同信号源的信号的功率总和；
    第一确定单元，用于当所述功率总和小于预设阈值时，确定所述信道为 空闲信道。
  19. 根据权利要求16所述的用户设备，其特征在于：
    所述测量模块具体用于当所述UE在所述信道上检测到有规律的标志性信号时确定所述信道非空闲。
  20. 根据权利要求18或19所述的用户设备，其特征在于，所述测量模块对所述信道进行预设阈值M次测量，若所述M次测量的结果均为空闲，则所述UE确认所述信道空闲，所述M次测量为非连续性测量或连续性测量。
  21. 根据权利要求16或17所述的用户设备，其特征在于：
    所述测量模块还用于当所述信道非空闲时，跳转到下一个信道进行测量或在预设的测量避让时间之后重新在所述信道进行测量。
  22. 根据权利要求16或17所述的用户设备，其特征在于，所述用户设备还包括：
    处理模块，用于当所述信道空闲时，预占用所述信道，预占用的信道为非空闲信道；
    所述连接建立模块，具体用于当到达建立D2D连接的时间点时，通过所述信道建立D2D连接。
  23. 根据权利要求22所述的用户设备，其特征在于，所述用户设备还包括：
    第三获取模块，用于获取测量随机量B和测量时长T；
    所述测量模块包括：
    第二确定单元，用于根据所述测量随机量B和测量时长T确定所述UE的测量起始时间；
    测量单元，用于从所述测量起始时间开始，在所述测量时长T内对所述信道进行测量以确定所述信道是否空闲。
  24. 根据权利要求16或17所述的用户设备，其特征在于，所述用户设备还包括：
    第四获取模块，用于获取D2D分布式网络连接的最大中继数；
    所述连接建立模块，具体用于在所述信道上建立D2D连接，所述D2D连接所使用的中继数小于或等于所述最大中继数。
  25. 根据权利要求16或17所述的用户设备，其特征在于，所述用户设备还包括：
    第五获取模块，用于获取D2D分布式网络连接的最大连接数；
    所述连接建立模块，包括：
    判断单元，用于判断D2D连接数是否大于所述最大连接数；
    连接单元，用于所述判断单元确定所述D2D连接数不大于所述最大连接数时，则在所述信道上建立D2D连接。
  26. 一种基站，其特征在于，包括：
    第一发送模块，用于向UE发起D2D分布式网络的数据传输请求；
    第二发送模块，用于向所述UE发送进行信道测量的时频域资源，所述时频域资源用于使所述UE对所述时频域资源所在的信道进行测量以确定所述信道是否空闲，若所述信道空闲，则通过所述信道建立D2D连接。
  27. 根据权利要求26所述的基站，其特征在于：
    所述第一发送模块具体用于向所述UE发送进行信道测量的频域范围和时域范围；所述时域范围包括测量专用子帧，或通过参数指示的非正常数据发送的时间间隔。
  28. 根据权利要求26或27所述的基站，其特征在于，所述基站还包括：
    第三发送模块，用于向所述UE发送测量随机量B和测量时长T，所述测量随机量B和测量时长T用于使所述UE确定在所述时频域资源上的测量起始时间，并从所述测量起始时间开始，在所述测量时长T内对所述信道进行测量以确定所述信道是否空闲。
  29. 根据权利要求26或27所述的基站，其特征在，所述基站还包括：
    第四发送模块，用于向所述UE发送D2D分布式网络连接的最大中继数，所述最大中继数用于限制所述UE在所述信道上建立D2D连接时使用的中继数应小于或等于所述最大中继数。
  30. 根据权利要求26或27所述的基站，其特征在于，所述基站还包括：
    第五发送模块，用于向所述UE发送D2D分布式网络连接的最大连接数，所述最大连接数用于使所述UE在确定自身的D2D连接数不大于所述最大连接数时，在所述信道上建立D2D连接。
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