WO2016127391A1 - Procédé de transmission de données pour réseau sans fil et nœud de réseau - Google Patents

Procédé de transmission de données pour réseau sans fil et nœud de réseau Download PDF

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Publication number
WO2016127391A1
WO2016127391A1 PCT/CN2015/073001 CN2015073001W WO2016127391A1 WO 2016127391 A1 WO2016127391 A1 WO 2016127391A1 CN 2015073001 W CN2015073001 W CN 2015073001W WO 2016127391 A1 WO2016127391 A1 WO 2016127391A1
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Prior art keywords
time domain
domain length
radio frame
network
radio
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PCT/CN2015/073001
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English (en)
Chinese (zh)
Inventor
李�远
李强
马莎
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华为技术有限公司
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Priority to CN201580002252.0A priority Critical patent/CN106171036B/zh
Priority to PCT/CN2015/073001 priority patent/WO2016127391A1/fr
Publication of WO2016127391A1 publication Critical patent/WO2016127391A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA

Definitions

  • the present invention relates to the field of communications, and in particular, to a data transmission method and a network node of a wireless network.
  • LTE Long Term Evolution
  • LTE-A Long Term Evolution-Advanced
  • OFDM Orthogonal Frequency Division Multiplexing
  • the unit is a resource element (RE) corresponding to one OFDM symbol in the time domain and one subcarrier in the frequency domain.
  • the resource block (RB) is composed of multiple OFDM symbols in the time domain. It is composed of consecutive subcarriers in the frequency domain and is the basic unit of resource scheduling.
  • LAA-LTE licensed Assisted Access LTE
  • PCC primary component carrier
  • Secondary secondary component carrier
  • eNB Evolved NodeB
  • LTE Long-Before-Talk
  • CCA Clear Channel Assessment
  • One radio frame period includes Channel Occupancy Time (COT) and idle time.
  • COT Channel Occupancy Time
  • IDP idle time.
  • the channel occupation time is the time when the transmitting node continuously occupies the channel to transmit information after the CCA detects that the channel is idle, the time domain length is between 1ms and 10ms, and the idle time length is at least 5% of the channel occupation time.
  • the CCA detection is located at the end of the IDP; the transmitting node performs channel sensing during the CCA time, wherein the duration of the CCA is not less than 20 ⁇ s; when the CCA detects that the channel is occupied, it is within the channel occupation time of the next radio frame period.
  • the sending node enters the IDP of the radio frame after the end of the COT, and the CCA at the end of the IDP is the next radio frame.
  • Perform a listening Take the European Telecommunications Standards Institute (ETSI) regulations as an example. Listening to the LBT includes two types of listening strategies: Frame Based Equipment (FBE) and Load Based Equipment (LBE). The former requires The interception and transmission obey a fixed frame structure, and the transmitting node performs channel interception in the CCA time. When the CCA detects that the channel is occupied, it does not send information during the channel occupation time of the next frame period, and vice versa.
  • ETSI European Telecommunications Standards Institute
  • the LBE specifies a fallback mechanism.
  • the CCA detects that the channel is occupied or the eNB ends the channel occupation, it will enter an extended CCA.
  • the counter is initialized to a random integer, and the channel is performed once every CCA duration. Listening, if the channel is detected to be idle, the counter is decremented by one until the counter of the extended CCA is zeroed and then the channel is sent to transmit traffic.
  • the LBE policy can obtain a fair transmission opportunity for the nodes competing for the same channel by randomizing the fallback window length. However, since the length of the waiting time for the sending node to listen is uncertain, the receiving node does not know the starting position of the data transmission, so it needs to continue.
  • the starting position of the signal transmission may not be located at the subframe boundary, and the transmitting node needs additional overhead to put the first subframe.
  • the number of symbols transmitted by the data is notified to the receiving node; in contrast, the FBE strategy is more suitable for the fixed frame structure design of the LTE system, and the receiving node only needs to detect the synchronization information at the beginning of each radio frame, which greatly saves the saving. Synchronization detection complexity, but since the FCA's CCA always appears at a fixed location, its channel access opportunities and channel occupancy fairness are limited.
  • the first method of the unlicensed spectrum channel resource occupation based on the FBE listening policy is as follows: adjusting the time for the eNB of different operators to send information frames on the unlicensed spectrum, so that The eNBs of different operators keep synchronization on the unlicensed spectrum, that is, the CCA of each eNB is in the CCA area of the neighboring other eNBs.
  • the licensed spectrum is usually asynchronous. If the synchronization on the unlicensed spectrum is to be implemented, the licensed spectrum and the unlicensed spectrum of the same eNB are asynchronous, which results in the control signaling and neighboring cells transmitting the unlicensed spectrum on the licensed spectrum.
  • the implementation complexity of measurement and the like increases.
  • the method for occupying the unlicensed spectrum channel resource based on the FBE listening policy is as follows: when the eNB does not occupy the channel resource for a period of time, the eNB replaces the configuration of the radio frame length, for example, the eNB2 keeps the radio frame length as 6ms, and the eNB1 replaces the radio frame length to 4ms, that is, the period in which the same relative position occurs in the CCA and the IDP is extended, so that the CCA has a certain probability of being aligned to the IDP area of other eNBs.
  • the number of occurrences of CCA and IDP in different lengths of radio frames is not equal.
  • the number of times the eNBs occupy the channel according to the CCA detection will not be the same, which results in the channel resources not being occupied. fair.
  • Embodiments of the present invention provide a data transmission method and a network node of a wireless network, where a network node configures a time domain length of a radio frame on an unlicensed spectrum, so that different network nodes can occupy a channel, thereby achieving fairness of network resource occupation. Sex.
  • the first aspect of the present invention provides a network sending node, including:
  • a determining module configured to determine a time domain length of a next one or more radio frames of a current radio frame on the unlicensed spectrum, where a time domain length of the next one or more radio frames and a time domain length of the current radio frame are not Equal length
  • a configuration module configured to configure the next one or more radio frames according to a time domain length of the next one or more radio frames
  • a sending module configured to send the configured one or more radio frames to the network receiving node when the idle channel is detected by the idle channel evaluation CCA.
  • the network sending node further includes: an acquiring module
  • the acquiring module is configured to acquire a time domain length of a current radio frame
  • the determining module is specifically configured to determine one or more time domain lengths different from a time domain length of the current radio frame, as the time domain length of the next one or more radio frames, the next one or more The time domain length of each radio frame in the radio frames is randomly generated between the shortest radio frame time domain length and the longest radio frame time domain length.
  • the sending module is further configured to send information about a time domain length of the next one or more radio frames to the network receiving node.
  • the determining module is specifically configured to select a radio frame time domain length sequence in a radio frame time domain length sequence set, and determine a time domain length of the next one or more radio frames according to the radio frame time domain length sequence, where
  • the radio frame time domain length sequence set is a set of the radio frame time domain length sequence, the radio frame time domain length sequence includes a plurality of elements, and the value of at least one element is not equal to the values of other elements, and each The value of each element corresponds to the time domain length of a radio frame.
  • the acquiring module is further configured to acquire an identifier of a time domain length sequence of the radio frame
  • the sending module is further configured to send the identifier to the network receiving node.
  • the network sending node further includes: an executing module
  • the executing module is configured to generate a radio frame time domain length sequence group according to the radio frame time domain length sequence;
  • the sending module is further configured to send a manner of generating a radio frame time domain length sequence group to the network receiving node.
  • the execution module is specifically configured to perform cyclic shift on the time series length sequence of the radio frame, and generate Radio frame time domain length sequence group.
  • the execution module is specifically configured to perform periodic extension on the time series length sequence of the radio frame to generate a radio frame time domain length sequence group.
  • a second aspect of the present invention provides a network receiving node, including:
  • An acquiring module configured to acquire a time domain length of the next one or more radio frames, where a time domain length of the next one or more radio frames is not equal to a time domain length of the current radio frame received on the unlicensed spectrum;
  • a receiving module configured to receive, according to a time domain length of the next one or more radio frames, a next one or more radio frames sent by the network sending node.
  • the acquiring module is specifically configured to receive information about a time domain length of the next one or more radio frames sent by the network sending node, and a time domain length of each radio frame in the next one or more radio frames
  • the network transmitting node is randomly generated between the shortest radio frame time domain length and the longest radio frame time domain length.
  • the acquiring module is specifically configured to receive an identifier of a time domain length sequence of a radio frame sent by the network sending node, and obtain a corresponding radio frame time domain length sequence from the radio frame time domain length sequence according to the identifier, where the wireless
  • the frame time domain length sequence set is a set of the radio frame time domain length sequence
  • the radio frame time domain length sequence includes a plurality of elements, the value of at least one element is not equal to the value of other elements, and the value of each element Corresponds to the time domain length of a radio frame.
  • the network receiving node further includes: an execution module
  • the executing module is configured to receive a generation manner of a radio frame time domain sequence group sent by the network sending node, and transform the radio frame time domain sequence according to the radio frame time domain sequence group generation manner, to obtain a Determining a radio frame time domain sequence group, and determining a time domain length of the next one or more radio frames according to the radio frame time domain sequence group.
  • the network receiving node further includes: a detecting module
  • the detecting module is configured to determine, according to a time domain length of the next one or more radio frames The time domain position of the control information detection is performed in one or more radio frames, and the control information is detected in the time domain position where the control information is detected.
  • the detecting module is further configured to determine, according to a time domain length of the next one or more radio frames, a signal duration of a last subframe of each of the next one or more radio frames, and according to The signal lasts for a duration and performs a corresponding rate match.
  • a third aspect of the present invention provides a signal transmission method for a wireless network, including:
  • the network sending node determines a time domain length of the next one or more radio frames of the current radio frame on the unlicensed spectrum, and the time domain length of the next one or more radio frames is not equal to the time domain length of the current radio frame ;
  • the network transmitting node transmits the configured one or more radio frames to the network receiving node.
  • the determining, by the network sending node, the time domain length of the next one or more radio frames of the current radio frame on the unlicensed spectrum includes:
  • the network sending node acquires a time domain length of the current radio frame
  • the network sending node determines one or more time domain lengths different from a time domain length of the current radio frame as a time domain length of the next one or more radio frames, the next one or more radio frames
  • the time domain length of each radio frame is randomly generated between the network sending node and the shortest radio frame time domain length and the longest radio frame time domain length.
  • the network sending node determines one or more time domain lengths different from the time domain length of the current radio frame, as After describing the time domain length of one or more radio frames, the following includes:
  • the network sending node transmits information of a time domain length of the next one or more radio frames to the network receiving node.
  • the determining, by the network sending node, the time domain length of the next one or more radio frames of the current radio frame on the unlicensed spectrum includes:
  • the network sending node selects a radio frame time domain length in a time series sequence set of the radio frame a sequence, the time domain length of the next one or more radio frames is determined according to the radio frame time domain length sequence, where the radio frame time domain length sequence set is a set of the radio frame time domain length sequence,
  • the radio frame time domain length sequence includes a plurality of elements, the value of at least one element is not equal to the values of other elements, and the value of each element corresponds to the time domain length of one radio frame.
  • the network sending node configures the next one or more according to a time domain length of the next one or more radio frames Before the wireless frame, it also includes:
  • the network sending node acquires an identifier of a time domain length sequence of the radio frame
  • the network sending node sends the identity to the network receiving node.
  • the network sending node selects a radio frame time domain length sequence in a radio frame time domain length sequence set, according to the radio frame time Before determining the time domain length of the next one or more radio frames, the domain length sequence further includes:
  • the network sending node sends the manner in which the radio frame time domain length sequence group is generated to the network receiving node.
  • the network sending node generates a radio frame time domain length sequence group according to the radio frame time domain length sequence, including:
  • the network sending node performs cyclic shift on the radio frame time domain length sequence to generate a radio frame time domain length sequence group.
  • the network sending node generates a radio frame time domain length sequence group according to the radio frame time domain length sequence, including:
  • the network sending node performs periodic extension on the radio frame time domain length sequence to generate a radio frame time domain length sequence group.
  • a fourth aspect of the present invention provides a signal transmission method for a wireless network, including:
  • the network receiving node acquires a time domain length of the next one or more radio frames, and the next one or more The time domain length of the line frame is not equal to the time domain length of the current radio frame received on the unlicensed spectrum;
  • the network receiving node receives the next one or more radio frames sent by the network sending node according to the time domain length of the next one or more radio frames.
  • the acquiring, by the network receiving node, the time domain length of the next one or more radio frames includes:
  • the network sending node randomly generates between the shortest radio frame time domain length and the longest radio frame time domain length.
  • the time domain length of the network receiving node acquiring the next one or more radio frames includes:
  • the length sequence set is a set of the time series length sequence of the radio frame, the radio frame time domain length sequence includes a plurality of elements, the value of at least one element is not equal to the value of other elements, and the value of each element corresponds to a wireless The time domain length of the frame.
  • the third embodiment of the fourth aspect of the present invention further includes:
  • the method includes:
  • the method includes:
  • Determining, by the network receiving node, the next time according to a time domain length of the next one or more radio frames The signal duration of the last subframe in each of the one or more radio frames is continued, and a corresponding rate match is performed according to the duration of the signal.
  • the network sending node determines the time domain length of the next one or more radio frames of the current radio frame on the unlicensed spectrum, and the network sending node configures the next one according to the time domain length of the next one or more radio frames. a plurality of radio frames, when the idle channel is detected by the CCA, the configured one or more radio frames are sent to the network receiving node, and the network receiving node acquires the time domain length of the next one or more radio frames, and receives the network.
  • the next one or more radio frames sent by the sending node the time domain length of the next one or more radio frames is different from the time domain length of the current radio frame, which may cause the CCA in the radio frame sent by the unsynchronized network sending node to have a probability Aligning to the IDP area in the radio frame, the unsynchronized network sending node simultaneously performs resource preemption, which reduces the probability that a certain transmitting node always occupies the channel and other transmitting nodes cannot always hear the channel idle, thereby better implementing the channel.
  • the fairness of resource occupation reduces the complexity of the actual system implementation.
  • FIG. 1 is a schematic structural diagram of a network sending node according to an embodiment of the present invention.
  • FIG. 2 is a schematic structural diagram of a network sending node according to another embodiment of the present invention.
  • FIG. 3 is a schematic structural diagram of a network sending node according to another embodiment of the present invention.
  • FIG. 4 is a schematic structural diagram of a network receiving node according to an embodiment of the present invention.
  • FIG. 5 is a schematic structural diagram of a network receiving node according to another embodiment of the present invention.
  • FIG. 6 is a schematic structural diagram of a network receiving node according to another embodiment of the present invention.
  • FIG. 7 is a schematic diagram of a data transmission method of a wireless network according to an embodiment of the present invention.
  • FIG. 8 is a schematic diagram of a data transmission method of a wireless network according to another embodiment of the present invention.
  • FIG. 9 is a schematic diagram of eNB1 preempting a channel after eNB1 preempts a channel according to an embodiment of the present invention.
  • FIG. 10 is a schematic diagram of a time domain length of a radio frame randomly generated by eNB1 and eNB2 according to an embodiment of the present invention
  • FIG. 11 is a schematic diagram of the eNB1 and the eNB2 having the same time domain length in the eNB1 and the eNB2, which causes the eNB1 to preempt the channel;
  • FIG. 12 is a schematic diagram of eNB1 and eNB2 configuring a time domain length of a radio frame according to a radio frame time domain length sequence according to an embodiment of the present invention
  • FIG. 13 is a schematic diagram of channel occupation of eNB1 and eNB2 after performing cyclic shift of a radio frame time domain length sequence according to an embodiment of the present invention
  • FIG. 14 is a schematic diagram of a time domain position of a synchronization signal detection in a subframe and a radio frame according to an embodiment of the present invention
  • 15 is a schematic diagram of a time domain location of a control channel detection in a subframe and a radio frame according to an embodiment of the present invention
  • 16 is a schematic diagram of a signal occupation time on a last subframe of each radio frame according to an embodiment of the present invention.
  • FIG. 17 is a schematic structural diagram of a terminal device according to an embodiment of the present invention.
  • Embodiments of the present invention provide a data transmission method and a network node of a wireless network, where a network node configures a time domain length of a radio frame on an unlicensed spectrum, so that different network nodes can occupy a channel, thereby achieving fairness of network resource occupation. Sex.
  • an embodiment of a network sending node in an embodiment of the present invention includes:
  • a determining module 101 configured to determine a time domain length of a next radio frame or a plurality of radio frames of a current radio frame on the unlicensed spectrum
  • the configuration module 102 is configured to configure the next one or more radio frames according to the time domain length of the next one or more radio frames determined by the determining module 101;
  • the sending module 103 is configured to send the next one or more radio frames configured by the configuration module 102 to the network receiving node when the idle channel is detected by the CCA.
  • the time domain length of the next one or more radio frames is not equal to the time domain length of the current radio frame, so that the CCA in the radio frame sent by the unsynchronized network sending node has a probability to be aligned to the radio frame.
  • the unsynchronized network sending node simultaneously performs resource preemption, which reduces the probability that a certain transmitting node always occupies the channel and other transmitting nodes cannot always hear the channel idle, thereby better achieving the fairness of channel resource occupation.
  • Sexuality reduces the implementation complexity of the actual system.
  • the network sending node further includes: an obtaining module 201;
  • the obtaining module 201 is configured to acquire a time domain length of the current radio frame.
  • the determining module 101 is specifically configured to determine one or more time domain lengths different from the time domain length of the current radio frame acquired by the obtaining module 201, as the time domain length of the next one or more radio frames;
  • the sending module 103 is further configured to send information about a time domain length of the next one or more radio frames determined by the determining module 101 to the network receiving node.
  • the determining module 101 determines the manner of the next one or more time domain lengths according to the time domain length of the current radio frame, so that the solution is more flexible.
  • the sending module 103 sends the information of the time domain length of the next one or more radio frames to the network receiving node, so that the solution is more perfect.
  • the network sending node further includes: an executing module 301;
  • the determining module 101 is specifically configured to select a radio frame time domain length sequence in the radio frame time domain length sequence set, and determine a time domain length of the next one or more radio frames according to the radio frame time domain length sequence;
  • the obtaining module 201 is further configured to obtain an identifier of a time series length sequence of the radio frame
  • the sending module 103 is further configured to send an identifier to the network receiving node;
  • the executing module 301 is configured to generate a radio frame time domain length sequence group according to the radio frame time domain length sequence.
  • the determining module 101 selects a manner in which the time domain length sequence of the radio frame determines the time domain length of the next one or more radio frames, so that the solution is more flexible.
  • the obtaining module 201 and the sending module 103 notify the network receiving node of the identifier of the radio frame time domain length sequence, so that the scheme implementation is more reliable.
  • the executing module 301 is specifically configured to perform cyclic shift on a sequence of radio frame time domain lengths to generate a radio frame time domain length sequence group;
  • radio frame time domain length sequence is used to perform periodic extension on the radio frame time domain length sequence, and generate a radio frame time domain length sequence group.
  • the execution module 301 expands the time series sequence of the radio frame to obtain a sequence group of the time domain length of the radio frame, which increases the selectivity of the scheme.
  • an embodiment of a network receiving node in the embodiment of the present invention includes:
  • the obtaining module 401 is configured to acquire a time domain length of the next one or more radio frames.
  • the receiving module 402 is configured to receive the next one or more radio frames sent by the network sending node according to the time domain length of the next one or more radio frames.
  • the time domain length of the next one or more radio frames is not equal to the time domain length of the current radio frame received on the unlicensed spectrum, and the CCA in the radio frame sent by the unsynchronized network sending node may be caused.
  • the unsynchronized network sending node simultaneously performs resource preemption, which reduces the probability that a receiving node always occupies the channel and other receiving nodes cannot receive the signal, thereby better realizing the channel resource.
  • the fairness of occupancy reduces the complexity of the implementation of the actual system.
  • the obtaining module 401 is specifically configured to receive information about a time domain length of the next one or more radio frames sent by the network sending node.
  • the method is configured to receive an identifier of a time domain length sequence of a radio frame sent by a network sending node, and obtain a corresponding radio frame time domain length sequence from the radio frame time domain length sequence according to the identifier.
  • the obtaining module 401 obtains two modes of the time domain length of the next one or more radio frames, so that the solution is more diverse.
  • the network receiving node further includes: an executing module 501;
  • the execution module 501 is configured to receive a radio frame time domain sequence generation manner according to a radio frame time domain sequence group generation manner, to obtain a radio frame time domain sequence group, and obtain a radio frame time domain sequence group according to a radio frame time domain sequence group generation manner, and The time domain length of the next one or more radio frames is determined according to the radio frame time domain sequence group.
  • the execution module 501 expands the time series sequence of the radio frame to obtain a sequence group of the time domain length of the radio frame, which increases the selectivity of the scheme.
  • the network receiving node further includes: a detecting module 601;
  • the detecting module 601 is configured to determine a time domain location for performing control information detection in one or more radio frames according to a time domain length of the next one or more radio frames, and detect control information in a time domain position where the control information detection is performed;
  • the detecting module 601 performs a corresponding operation according to the time domain length of the next one or more radio frames, so that the solution is more specific.
  • the embodiments of the present invention may be applied to a wireless communication system on an unlicensed spectrum, such as an LAA-LTE system, where a network sending node may aggregate multiple carriers by using a carrier aggregation CA technology, such as an unlicensed carrier and an authorized carrier, an unlicensed carrier.
  • a carrier aggregation CA technology such as an unlicensed carrier and an authorized carrier, an unlicensed carrier.
  • the carrier allocation scenario includes: 1. the licensed spectrum and the unlicensed spectrum co-site deployment, that is, the licensed spectrum and the unlicensed spectrum are aggregated by the same network sending node, and the network sending node sets the authorized carrier as the primary component carrier PCC.
  • the unlicensed carrier is set to the secondary component carrier SCC; 2.
  • the licensed spectrum and the unlicensed spectrum are deployed in non-co-location, for example, the licensed spectrum is deployed in the macro base station, and the unlicensed spectrum is deployed in the low power node, including the micro area, the pico area, and the home.
  • the base station, the remote radio head or the relay, etc., the macro base station and the low power node are connected through an ideal or non-ideal backhaul link; 3.
  • the unlicensed spectrum is independently deployed on the network sending node, that is, the network sending node only uses Unlicensed spectrum, without the use of licensed spectrum, the payload of the network transmitting node that can be used on the unlicensed spectrum It can be one or more than one.
  • the coexistence scenarios include: different LAA-LTE operators.
  • the network transmitting nodes coexist; the LAA-LTE network transmitting node (including a single LAA-LTE operator and a plurality of LAA-LTE operators) and other wireless communication systems operating in the unlicensed spectrum coexist.
  • the network sending node in the embodiment of the present invention is mainly a base station or user equipment that can work on an unlicensed spectrum, where the base station can be a macro base station, a micro cell, a pico cell, a home base station, a remote radio head or a relay, etc.;
  • the device can be a mobile phone, a terminal device such as a laptop or a tablet that can access the LTE system.
  • the embodiment of the present invention can be applied to an FBE-based LAA-LTE system, in which the interception-transmission process takes one radio frame as a period, and one radio frame period includes a channel Occupancy Time (COT) and an idle time (IDle Period, IDP), wherein the channel occupation time is the time when the transmitting node continuously occupies the channel to transmit information after the CCA detects that the channel is idle, the time domain length is between 1ms and 10ms, and the idle time length is at least 5% of the channel occupation time, and the CCA detection is located.
  • COT channel Occupancy Time
  • IDP idle time
  • the tail node performs channel interception in the CCA time, wherein the duration of the CCA is not less than 20 ⁇ s; when the CCA detects that the channel is occupied, the service is not sent during the channel occupancy time of the next radio frame period, and vice versa. When the channel is idle, the service is sent in the next channel occupation time; in both cases, the transmitting node enters the IDP of the radio frame after the end of the COT, and the CCA at the end of the IDP performs the interception for the next radio frame.
  • the CCA performs energy detection, that is, detects the energy of the entire carrier bandwidth of the current carrier in the corresponding time of the CCA. If the normalized power exceeds a fixed threshold, it indicates that the channel is occupied, otherwise the channel is idle, and the current transmitting node can occupy the channel.
  • the following is an example in which the network sending node is a base station, but it is also applicable to user equipment.
  • the network sending nodes that compete for the same channel in the same area are all overloaded as an example.
  • the network sending node that is occupying the channel is called an occupied node, and the network sending that continuously performs interception without occupying the channel is sent.
  • a node is called a listening node.
  • the network sending node contends for the same unlicensed spectrum channel, if the time domain length of each radio frame of each transmitting node (or the number of sub-frames included in the radio frame) is the same, there may be a occupied node.
  • the information is continuously sent, and the surrounding listening nodes have been unable to preempt the channel problem.
  • the FBE is based on the characteristics of the fixed frame configuration, for each transmitting node, its CCA and IDP will periodically appear in the same location. That is, the relative position between the IDP of the occupied node and the CCA of the listening node is always fixed, as shown in FIG.
  • the listening nodes are preemptive of the channel, even at certain specific subframe boundaries.
  • the CCA of the listening node is aligned to the IDP area of the occupied node, so that in the next radio frame, the original listening node becomes the occupied node, and the original occupied node becomes the listening node. Since the CCA is located at the end of the IDP, The original CCA of the occupied node must be aligned to the COT area of the original listening node, resulting in the original sending node always occupying the channel in the subsequent time.
  • one method is to make one of the nodes in the common contention channel network transmitting node, or all the competing nodes, determine the next one or more of the current radio frame by the determining module 101.
  • the time domain length of the radio frame with the unequal length of the time domain.
  • the time domain length is 1 ms, that is, an integer multiple of 1 subframe length due to IDP and CCA is at the end of the radio frame, so The different time domain lengths of consecutive radio frames may cause the relative positions of the IDPs of the occupied nodes and the CCA of the listening nodes to no longer appear periodically, but exhibit randomization characteristics as the time domain length of the radio frames changes.
  • the CCA can be organically aligned to the IDP area of the occupied node to preempt the channel. As shown in FIG. 10, it is assumed that the frame boundary offset value of the eNB1 relative to the eNB2 is the same as that of FIG.
  • the value of the domain length is “3”, and the determining module 101 in the eNB1 determines the time domain length of the next one or more radio frames. For example, the time domain length of the four radio frames determined by the eNB1 is “4, 2, 5, 6”.
  • the eNB2 determines the time domain length of the next one or more radio frames, for example, the time domain length of the radio frame determined by the determining module 101 in the eNB2 is "6, 4, 2, 4"; the visible eNB1 may be in the first radio frame.
  • the tail CCA detects that the channel is idle, so that the channel occupies the radio frame, and the eNB2 listens to the channel in the second and third radio frames, and the channel is idle in the fourth radio frame, thereby reoccupying the channel.
  • the channels are all occupied by eNB2.
  • the number of times the two eNBs preempt the channel in FIG. 10 is equivalent.
  • whether the preempted channel is related not only to the relative time domain position of the CCA and the IDP, but also to the time domain length of the sending node IDP, and the IDP time The longer the domain length is, the more random the CCA is aligned to the IDP area of the occupied node.
  • the listening node even if the IDP of the node is large, the listening node always preempts the channel. It can happen that in the actual system, the time domain length of the radio frame of the occupied node and the listening node can be randomly generated, or only the listening node can be randomly generated and the occupied node still adopts a fixed frame length configuration. In this case, the listening node has a certain chance to align its CCA to the IDP of the occupied node, and the listening node only needs to determine the time domain length of the next or multiple radio frames according to the CCA listening result, without passing through the node.
  • the transmitting module 103 determines the mode through the control channel.
  • the information about the time domain length of the next one or more radio frames determined by the block 101 notifies the network receiving node, and may also not notify the network receiving node of the information of the time domain length of the next one or more radio frames, but the network receiving node Performing a blind check synchronization channel, a pilot signal, a control channel, and the like at the start position of each subframe; however, if the inventing module 103 notifies the network receiving node of the information of the time domain length of the next one or more radio frames, the network receiving node is After receiving the information, it is only necessary to perform blind detection at the start position of each corresponding radio frame.
  • the information of the time domain length of the radio frame includes both the time domain length of the radio frame and the length of the radio frame. Including other information that can be mapped to the length of the radio frame time domain, such as the time domain length of the COT in the radio frame, the time domain length of the IDP, etc., and the network receiving node can pass the time domain of the COT or IDP when the COT and IDP ratios are known. The length is calculated to obtain the time domain length of the radio frame.
  • the determining module 101 determines that the next one or more radio frame time domain lengths that are not equal to the current radio frame's time domain length can obtain better CCA and IDP location randomization characteristics, but the sending module 103 needs to set each radio.
  • the information of the time domain length of the frame notifies the network receiving node, which brings a large overhead.
  • a method based on the radio frame time domain length sequence may be used, that is, a wireless communication system supporting the use of the FBE listening strategy.
  • each sequence corresponds to a radio frame time domain length sequence
  • the radio frame time domain length sequence includes multiple elements, and the value of each element corresponds to a time domain length of one radio frame
  • the time domain length of the radio frame ie, the value of each element
  • the value of each element represents the number of sub-frames contained in a radio frame.
  • the sequence can be randomly generated, or it can be simulated or measured for possible various radio frames.
  • the time domain length combination is optimized.
  • the determining module 101 determines the time domain length of the next or more radio frames that are not equal to the time domain length of the current radio frame. In the method, the time domain length of any radio frame determined by the determining module 101 is independent of each other, and based on the method of the radio frame time domain length sequence, the sequence is pre-generated, so the configuration module 102 is configured.
  • the time domain length of each radio frame is related to the sequence and the time domain length of the previous radio frame; as shown in FIG. 12, the radio frame time domain length sequence takes four elements as an example, but actually each sequence can be The number of configured elements includes, but is not limited to, four.
  • the radio frame time domain length sequence takes four elements as an example, but actually each sequence can be
  • the number of configured elements includes, but is not limited to, four.
  • the determining module 101 of the eNB1 selects the sequence ⁇ 5, 3, 2, 4 ⁇ in the radio frame time domain length sequence set, and the determining module 101 of the eNB2 In the radio frame time domain length sequence set selection sequence ⁇ 2, 3, 4, 5 ⁇ , then under the frame boundary offset in Figure 12, eNB1 and eNB2 have the opportunity to preempt the channel in a sequence of periods, Figure 11 In the frame boundary offset, the two transmitting nodes can obtain the opportunity to preempt the channel by using the sequence of variable frame length.
  • the period of the same relative position of the CCA and the IDP in the sequence is 14 ms, which is still a small one.
  • this short cycle configuration may still occur in one of the networks
  • the sending node always preempts the channel resources.
  • the first method is: if the network sending node cannot still preempt the channel in the CCA at the end of the last radio frame of the sequence, the sending module 103 notifies the identifier of the time series sequence of the radio frame in the time series sequence sequence of the newly selected radio frame.
  • the network receives the node, but this method has a large signaling overhead;
  • the second method is: the determining module 101 selects a sequence with a larger number of elements to expand the period, for example, ⁇ 5, 3, 2, 4, 8, 10, 7, 1,6,9 ⁇ ;
  • the third method is: the execution module 301 performs a cyclic shift or periodic extension of the radio frame time domain length sequence selected by the determining module 101 to generate a radio frame time domain length sequence group, and subsequent radio frames.
  • the time domain length is configured according to the radio frame time domain length sequence in the radio frame time domain length sequence group. For example, the sequence ⁇ 5, 3, 2, 4 ⁇ of eNB1 in FIG.
  • the determining module 101 may reselect a sequence from the radio frame time domain length sequence set. Used to determine the time domain length of the next radio frame or frames.
  • the method for generating a radio frame time domain length sequence group according to the selected radio frame time domain length sequence is extended as in the prior art scheme 2, and the period in which the CCA and the IDP appear the same relative position is expanded, but compared with the current
  • the combination of the time domain length configuration of the plurality of radio frames and the cyclic shift in the method greatly increase the length of the period, so that the effect similar to the time domain length of the randomized radio frame can be approximated.
  • the execution module 301 can also have multiple time ranges according to the radio frame time domain.
  • the manner of generating a sequence of radio frame time domain length sequences, for example, performing period expansion or cyclic shift, the cyclic shift mode includes: cyclic left shift, right shift, and shifting bits at a time, and semi-statically through RRC signaling Inform the network receiving node, taking ⁇ 5,3,2,4 ⁇ as an example, looping one bit to the left to get ⁇ 3, 2, 4, 5 ⁇ , and shifting the left side by two to get ⁇ 2, 4, 5, 3 ⁇ , Loop one bit to the right to get ⁇ 4,5,3,2 ⁇ , no Cyclic shift randomization may achieve different effects.
  • the occupied node and the listening node may select a radio frame time domain length sequence to configure the time domain length of the radio frame, and the selected radio frame time domain length sequence may also not notify the occupied node (ie, still adopt the fixed frame time domain length configuration)
  • the listening node is required to select the time series length sequence of the radio frame, and the purpose of randomizing the relative positions of the CCA and the IDP can also be achieved.
  • All network transmitting nodes and network receiving nodes in the communication system know the radio frame time domain length sequence set, so the transmitting module 103 only needs to use the RRC signaling to semi-statically concentrate the radio frame time domain length sequence in the radio frame time domain length sequence.
  • the frame time domain length sequence is the last element of the current sequence, and the network receiving node performs synchronization detection in the next radio frame according to the cyclically shifted sequence; the sending module 103 may also not identify the radio frame time domain length sequence or the radio frame.
  • the time domain length sequence group generation manner notifies the network receiving node, and the network receiving node performs a blind detection synchronization channel, a pilot signal, a control channel, and the like at the beginning position of each subframe, but if the transmitting module 103 sets the radio frame time domain
  • the length sequence identifier or the radio frame time domain length sequence group generation manner notifies the network receiving node, the network connection After receiving the identifier or the generation mode, the node only needs to perform blind detection at the start position of each corresponding radio frame. If the control information of the network sending node is not detected, it is determined that the network sending node does not have time in the current radio frame. Occupying the channel without each sub-frame detection helps to reduce the detection complexity of the network receiving node.
  • the determining module 101 may randomly select a radio frame time domain length sequence in a radio frame time domain length sequence set, and may also select a specific radio frame time domain length sequence according to service requirements, for example, a higher priority. For services with a small packet length, you can select a sequence with a smaller average time domain length, for example, ⁇ 1, 2, 1, 1 ⁇ . Because of the shorter interval of CCA listening, there is a greater chance of preempting channel resources. In addition, some service data packets are large, and there is a certain requirement for delay. A high-level data packet needs to be transmitted in one radio frame. Therefore, a sequence with a long average time domain length is required, and the compatibility with the conventional one is considered.
  • the fixed frame length configuration allows a fixed frame length, such as ⁇ 10, 10, 10, 10 ⁇ , to be a sequence in the set.
  • the sending module 103 involved in the foregoing embodiment may be implemented by a base station or a transmitter of the user equipment.
  • the obtaining module 201, the determining module 101, the configuration module 102, and the executing module 301 involved in the foregoing embodiments may be implemented by A processor implementation in a base station or user equipment.
  • the network receiving node in the embodiment of the present invention is mainly a base station or user equipment that can work on an unlicensed spectrum, where the base station can be a macro base station, a micro cell, a pico cell, a home base station, a remote radio head or a relay, etc.;
  • the device can be a mobile phone, a terminal device such as a laptop or a tablet that can access the LTE system.
  • the following is an example in which the network receiving node is a user equipment, but it is also applicable to a base station.
  • the base station is used as the network sending node, and the base station determines the time domain length of the next radio frame or the current radio frame on the unlicensed spectrum, and sends the information of the time domain length of the next one or more radio frames.
  • the obtaining module 401 receives the information, so as to obtain the time domain length of the next one or more radio frames; or, when the base station selects the radio frame time domain length sequence from the radio frame time domain length sequence set, according to the The radio frame time domain length sequence determines the time domain length of the next one or more radio frames, and when the identifier of the radio frame time domain length sequence is sent to the user equipment, the acquiring device 401 receives the identifier, according to the identifier from the radio frame.
  • the sequence of the length of the domain length is obtained by the sequence of the length of the domain, the sequence of the time domain length of the radio frame includes multiple elements, and the value of at least one element is not equal to the value of other elements, and the value of each element corresponds to a radio frame.
  • the length of the time domain thereby obtaining the time domain length of the next one or more radio frames, and the receiving module 402 acquires the next one or more After the length of the time domain frame, at one or more radio frames received from the base station.
  • the executing module 501 receives the generation mode, and performs wireless manner according to the generation manner.
  • the frame time domain sequence is transformed to obtain the same radio frame time domain sequence group as the base station, and the time domain length of the next one or more radio frames is determined according to the radio frame time domain sequence group.
  • the detecting module 601 may determine the frame header position of the next one or more radio frames, and the detecting module 601 obtains the frame header position of the radio frame, which is helpful on the one hand. Judging the time domain position of the partial control information, such as the synchronization signal and the broadcast signal, as shown in FIG. 14, for example, in the Frequency Division Duplexing (FDD) mode, the synchronization signal always appears in the first of each radio frame.
  • FDD Frequency Division Duplexing
  • the user equipment At the end of the time slot, if the user equipment knows the position of the frame header of the radio frame, it only needs to go to the frame header position to detect the synchronization signal; otherwise, if the acquisition module 401 does not acquire the time domain length of each radio frame. , then need to detect module 601 in each radio frame The sync signal is detected on all sub-frames, resulting in an increase in detection complexity.
  • the detection part control information such as the complexity of the physical downlink control channel (PDCCH) and the pilot signal, may be reduced.
  • a pilot signal such as a Cell Specific Reference Signal (CRS)
  • CRS Cell Specific Reference Signal
  • the detecting module 601 detects the two signals, it can determine that the base station successfully occupies the channel to receive the current radio frame, and Performing subsequent data reception, and vice versa, does not need to receive subsequent data on the radio frame. If the detection module 601 can acquire the frame header position of the radio frame, only the pilot is needed in the first subframe of each radio frame. The signal and the PDCCH may be detected. If the detection module 601 does not detect the signals, the judgment is performed. The subsequent subframe of the current radio frame is also not occupied by the base station, and the subsequent subframes of the current radio frame are not required to be detected.
  • the detection module 601 needs to Each of the subframes performs detection of the pilot signal and the PDCCH to determine whether the base station occupies the subframe, which increases the detection complexity of the user equipment.
  • the obtaining module 401 can also implement rate matching of the last subframe of each radio frame by acquiring the time domain length of the next one or more radio frames. Since the FBE must enter the IDP after the COT, and the IDP time length is at least the COT. 5% of the time, on the other hand, the radio frame length is usually an integer number of subframes. Therefore, when the radio frame length is M subframes, the COT duration is usually not an integer number of subframes, but M-1 subframes plus several OFDM symbols, such as As shown in FIG. 16 , in the time domain length of different radio frames, the number of OFDM symbols occupied by the signals transmitted by the longest COT and the corresponding last subframe is shown in Table 1.
  • the COT time is limited by the maximum transmission length of 10 ms. Only 10 subframes can be transmitted, and the idleness of the last subframe is used as the IDP, that is, the time domain length of the radio frame is 11 ms. IDP is 10% of the COT. Assuming that the ratio of the IDP to the COT can be semi-statically notified to the user equipment through broadcast signaling, the base station needs to configure the signal duration according to the ratio in each radio frame, if the acquisition module 401 can know the time domain length of each radio frame.
  • the number of OFDM symbols occupied by the signal in the last subframe of the radio frame can be calculated (for example, according to the mapping in the following table), thereby achieving rate matching, that is, according to the pair
  • the number of OFDM symbols should be decoded. If the user equipment does not know the time domain length of each radio frame, the last subframe is still decoded according to 14 OFDM symbols, which will cause the last subframe to fail to receive.
  • the receiving module 402 involved in the foregoing embodiment may be implemented by a base station or a receiver of the user equipment.
  • the acquiring module 401, the executing module 501, and the detecting module 601 involved in the foregoing embodiments may be used by a base station or a user. Processor implementation in the device.
  • an embodiment of a data transmission method for a wireless network includes:
  • the network sending node determines a time domain length of a next one or more radio frames of a current radio frame on the unlicensed spectrum.
  • the time domain length of the next one or more radio frames is not equal to the time domain length of the current radio frame.
  • the network sending node configures the next one or multiple radio frames according to the time domain length of the next one or more radio frames.
  • the network sending node When detecting an idle channel by using the CCA, the network sending node sends the configured one or more radio frames to the network receiving node.
  • the network transmitting node determines the time domain length of the next one or more radio frames of the current radio frame on the unlicensed spectrum, including:
  • the network sending node acquires the time domain length of the current radio frame
  • the network sending node determines one or more time domain lengths different from the time domain length of the current radio frame as the time domain length of the next one or more radio frames, and the time domain of each radio frame in the next one or more radio frames
  • the length of the network sending node is between the shortest radio frame time domain length and the longest radio frame time domain length. Machine generated.
  • the network sending node determines one or more time domain lengths different from the time domain length of the current radio frame, and the time domain length of the next one or more radio frames includes:
  • the network transmitting node transmits information of the time domain length of the next one or more radio frames to the network receiving node.
  • the network transmitting node determines the time domain length of the next one or more radio frames of the current radio frame on the unlicensed spectrum, including:
  • the network sending node selects a radio frame time domain length sequence in the radio frame time domain length sequence set, and determines a time domain length of the next one or more radio frames according to the radio frame time domain length sequence, wherein the radio frame time domain length sequence set is A set of radio frame time domain length sequences, the radio frame time domain length sequence includes a plurality of elements, the value of at least one element is not equal to the values of other elements, and the value of each element corresponds to the time domain length of one radio frame.
  • the network sending node may further include: before configuring the next one or more radio frames according to the time domain length of the next one or more radio frames:
  • the network sending node sends the identity to the network receiving node.
  • the network sending node selects a radio frame time domain length sequence in the radio frame time domain length sequence set, and determines the time domain length of the next one or more radio frames according to the radio frame time domain length sequence.
  • the network sending node generates a radio frame time domain length sequence group according to the radio frame time domain length sequence
  • the network sending node sends the generation manner of the radio frame time domain length sequence group to the network receiving node.
  • the network sending node generates a radio frame time domain length sequence group according to the radio frame time domain length sequence, including:
  • the network sending node performs cyclic shift on the radio frame time domain length sequence to generate a radio frame time domain length sequence group.
  • the network sending node generates a radio frame time domain length sequence group according to the radio frame time domain length sequence, including:
  • the network sending node performs periodic extension on the radio frame time domain length sequence to generate a radio frame time domain length sequence group.
  • the time domain length of the next one or more radio frames is different from the time domain length of the current radio frame, so that the CCA in the radio frame sent by the unsynchronized network sending node has a probability to be aligned into the radio frame.
  • the unsynchronized network sending node simultaneously performs resource preemption, which reduces the probability that a certain transmitting node always occupies the channel and other transmitting nodes cannot always hear the channel idle, thereby better achieving the fairness of channel resource occupation. Reduce the implementation complexity of the actual system.
  • the network sending node may determine the time domain length of the next radio frame or multiple radio frames on the unlicensed spectrum according to the obtained time domain length of the current radio frame, or may select one of the radio frame time domain length sequence sets.
  • the time range of the radio frame time domain length is determined according to the time series length sequence of the radio frame, and the time length of the next radio frame is determined by the network sending node, and the length of the time domain of the next radio frame is determined by other methods. .
  • the manner in which the network sending node generates the radio frame time domain length sequence group according to the radio frame time domain length sequence may be a cyclic shift, for example, a left shift or a right shift one bit, etc.; Extending, for example, a radio frame time domain length sequence ⁇ 1, 2, 3 ⁇ containing three elements is periodically extended to generate a radio frame time domain length sequence group ⁇ 1, 2, 3, 1, 2, 3 ⁇ , In a specific implementation, the manner of generating the radio frame time domain length sequence group may also be other manners, which is not limited herein.
  • an embodiment of a data transmission method for a wireless network includes:
  • the network receiving node acquires a time domain length of the next one or more radio frames.
  • the time domain length of the next one or more radio frames is not equal to the time domain length of the current radio frame received on the unlicensed spectrum.
  • the network receiving node receives the next one or more radio frames sent by the network sending node according to the time domain length of the next one or more radio frames.
  • the time domain length of the network receiving node acquiring the next one or more radio frames includes:
  • the network receiving node receives the information of the time domain length of the next one or more radio frames sent by the network sending node, and the time domain length of each radio frame in the next one or more radio frames is the shortest radio frame time domain length of the network sending node. Randomly generated between the length of the longest radio frame and the time domain.
  • the time domain length of the network receiving node acquiring the next one or more radio frames includes:
  • the network receiving node receives the identifier of the time domain sequence of the radio frame sent by the network sending node, and obtains the corresponding time series sequence of the radio frame from the time series sequence of the radio frame according to the identifier, and the time series sequence set of the radio frame is the radio frame time domain.
  • the set of length sequences, the radio frame time domain length sequence includes a plurality of elements, the values of at least one element are not equal to the values of other elements, and the value of each element corresponds to the time domain length of one radio frame.
  • the network receiving node receives the generation manner of the radio frame time domain sequence group sent by the network sending node, and transforms the radio frame time domain sequence according to the radio frame time domain sequence group generation manner to obtain the radio frame time domain sequence group, and according to the radio frame
  • the time domain sequence group determines the time domain length of the next one or more radio frames.
  • the method includes:
  • the network receiving node determines a time domain position in which control information is detected in the next one or more radio frames according to a time domain length of the next one or more radio frames, and detects a control signal in a time domain position at which the control signal detection is performed.
  • the method includes:
  • the network receiving node determines a signal duration of a last subframe of each of the next one or more radio frames according to a time domain length of the next one or more radio frames, and performs corresponding rate matching according to the duration of the signal. .
  • the time domain length of the next one or more radio frames is not equal to the time domain length of the current radio frame received on the unlicensed spectrum, and the CCA in the radio frame sent by the unsynchronized network sending node may be caused.
  • the unsynchronized network sending node simultaneously performs resource preemption, which reduces the probability that a receiving node always occupies the channel and other receiving nodes cannot receive the signal, thereby better realizing the channel resource.
  • the fairness of occupancy reduces the complexity of the implementation of the actual system.
  • the embodiments of the present invention may be applied to a wireless communication system on an unlicensed spectrum, such as an LAA-LTE system, where a network sending node may aggregate multiple carriers by using carrier aggregation CA technology.
  • the unlicensed carrier and the authorized carrier, the unlicensed carrier, and the unlicensed carrier the carrier allocation scenario includes: 1.
  • the licensed spectrum and the unlicensed spectrum are co-site deployed, that is, the licensed spectrum and the unlicensed spectrum are aggregated by the same network sending node, the network
  • the transmitting node sets the authorized carrier as the primary component carrier PCC, and sets the unlicensed carrier as the secondary component carrier SCC; 2.
  • the licensed spectrum and the unlicensed spectrum are not co-located, for example, the licensed spectrum is deployed in the macro base station, and the unlicensed spectrum is deployed in the low
  • the power node includes a micro cell, a pico cell, a home base station, a remote radio head or a relay, etc., and the macro base station and the low power node are connected through an ideal or non-ideal backhaul link; 3.
  • the unlicensed spectrum is independently deployed in the On the network sending node, that is, the network sending node uses only the unlicensed spectrum, instead of using the licensed spectrum, the network transmitting node can use one or more carriers on the unlicensed spectrum. In addition, consider the unlicensed spectrum.
  • Coexistence scenarios include: coexistence of network transmitting nodes of different LAA-LTE operators; LAA-LTE network transmitting nodes (including both single LAA-LTE operators and multiple LAA-LTE operators) and other work in unlicensed spectrum Wireless communication systems coexist and the like.
  • the network sending node in the embodiment of the present invention is mainly a base station or user equipment that can work on an unlicensed spectrum, where the base station can be a macro base station, a micro cell, a pico cell, a home base station, a remote radio head or a relay, etc.;
  • the device can be a mobile phone, a terminal device such as a laptop computer or a tablet computer that can access the LTE system.
  • the embodiment of the present invention can be applied to an FBE-based LAA-LTE system, in which the interception-transmission process takes one radio frame as a period, and one radio frame period includes a COT and an IDP, where the channel occupation time is that the transmitting node detects the channel idle at the CCA.
  • the CCA detection is located at the end of the IDP; the transmitting node performs channel sensing during the CCA time, wherein The duration of the CCA is not less than 20 ⁇ s; when the CCA detects that the channel is occupied, no traffic is sent during the channel occupancy time of the next radio frame period, and if the channel is idle, the service is transmitted within the next channel occupation time. In both cases, the transmitting node enters the IDP of the radio frame after the end of the COT, and performs CSS for the next radio frame at the end of the IDP.
  • the CCA performs energy detection, that is, detects the energy of the entire carrier bandwidth of the current carrier in the corresponding time of the CCA. If the normalized power exceeds a fixed threshold, it indicates that the channel is occupied, otherwise the channel is idle, and the current transmitting node can occupy the channel.
  • the following is an example in which the network sending node is a base station, but it is also applicable to user equipment.
  • the network sending nodes that compete for the same channel in the same area are all overloaded as an example.
  • the network sending node that is occupying the channel is called an occupied node, and the network sending that continuously performs interception without occupying the channel is sent.
  • a node is called a listening node.
  • the network sending node contends for the same unlicensed spectrum channel, if the time domain length of each radio frame of each transmitting node (or the number of sub-frames included in the radio frame) is the same, there may be a occupied node.
  • the information is continuously sent, and the surrounding listening nodes have been unable to preempt the channel problem.
  • the FBE is based on the characteristics of the fixed frame configuration, for each transmitting node, its CCA and IDP will periodically appear in the same location. That is, the relative position between the IDP of the occupied node and the CCA of the listening node is always fixed, as shown in FIG.
  • the listening nodes are preemptive of the channel, even at certain specific subframe boundaries.
  • the CCA of the listening node is aligned to the IDP area of the occupied node, so that in the next radio frame, the original listening node becomes the occupied node, and the original occupied node becomes the listening node. Since the CCA is located at the end of the IDP, The original CCA of the occupied node must be aligned to the COT area of the original listening node, resulting in the original sending node always occupying the channel in the subsequent time.
  • one method is to make one of the nodes in the co-competition channel network sending node, or all competing nodes determine the time domain length of the next or more and the current radio frame.
  • the value of the time domain length of the current radio frame is "3"
  • the eNB1 determines the time domain length of the next radio frame or multiple radio frames, for example, the time domain length of the four radio frames determined by the eNB1 is " 4, 2, 5, 6”
  • eNB2 determines the time domain length of the next radio frame or multiple radio frames, for example, the time domain length of four radio frames determined by eNB2 is "6, 4, 2, 4"
  • the CCA at the end of the first radio frame detects that the channel is idle, thereby occupying the channel Sending information, eNB2 listens to the channel in the second and third radio frames, and the channel is idle in the fourth radio frame, thereby reoccupying the channel, compared to the case where all channels are occupied by eNB2 in FIG.
  • the number of times the two eNBs preempt the channel is equivalent.
  • whether the preempted channel is related not only to the relative time domain location of the CCA and IDP, but also to the time domain length of the transmitting node IDP, and the time domain length of the IDP.
  • the longer the position the more randomized the CCA has the greater probability of aligning to the IDP area of the occupied node; but for the fixed frame length configuration, even if the IDP of the node is large, the situation that the listening node has been preempting the channel will still occur.
  • the time domain length of the radio frame of the occupied node and the listening node may be randomly generated, or only the listening node may be randomly generated and the occupied node still adopts a fixed frame length configuration. All of the following can make the listening node have a certain chance to align its CCA to the IDP of the occupied node, and only use the fixed frame length configuration when the listening node is randomly generated and the occupied node is still configured.
  • the interception node only needs to determine the time domain length of the next or multiple radio frames according to the CCA interception result, and does not need to notify the occupied node that configures the fixed frame length to change the frame length configuration by means of inter-node cooperation or the like, thereby having more Wide applicability; the network sending node (eNB1 and eNB2) notifies the network receiving node of the determined information of the time domain length of the next radio frame or the plurality of radio frames through the control channel, and may or may not leave the next one or more radio frames
  • the information of the time domain length informs the network receiving node, and the network receiving node performs a blind detection synchronization channel, a pilot signal, a control channel, and the like at the beginning position of each subframe; however, if the network transmitting node will next or multiple wireless
  • the information of the frame time domain length informs the network receiving node that after receiving the information, the network receiving node only needs to perform blind detection at the beginning position of each corresponding radio frame, and if
  • the network sending node does not occupy the channel during the current radio frame time, and does not need to detect each subframe, which helps to reduce the network.
  • the detection complexity of the receiving node, the information of the time domain length of the radio frame includes both the time domain length of the radio frame and other information that can be mapped to the time domain length of the radio frame, such as the time domain length of the COT in the radio frame, and the time of the IDP.
  • the length of the domain, etc., the network receiving node can calculate the time domain length of the radio frame by the time domain length of the COT or IDP when the COT and IDP ratios are known.
  • the method for determining the time domain length of the next or more radio frames that are not equal to the time domain length of the current radio frame may obtain better CCA and IDP location randomization characteristics, but the time domain length of each radio frame needs to be obtained.
  • the information is notified to the network receiving node, which brings a large overhead.
  • a method based on the sequence length of the radio frame time domain may be used, that is, the FBE listening policy is supported for use.
  • the wireless communication system designs a radio frame time domain length sequence set, wherein each sequence corresponds to a radio frame time domain length sequence, the radio frame time domain length sequence includes multiple elements, and the value of each element corresponds to a wireless The time domain length of the frame, the time domain length of the radio frame (ie the value of each element) in the shortest radio frame time domain length (eg 1 ms as defined by the FBE regulations) and the longest radio frame time domain length (eg 10 ms as defined by the FBE regulations) Randomly generated between each element, the value of each element represents the number of sub-frames contained in a radio frame, the sequence can be randomly generated, or can be optimized by simulation or actual measurement for various combinations of possible frame lengths, as long as multiple in the sequence
  • the elements have different values, which can achieve the effect of changing the relative position of the CCA of the listening node and the IDP of the occupied node, so that the CCA has a certain chance to align to the IDP area, so the same can be achieved.
  • the network sending node determines the next one or more radio frames that are not equal in length to the current radio frame.
  • the time domain lengths of any radio frames determined by the network sending node are independent of each other, and the sequence is pre-generated according to the method of the radio frame time domain length sequence, so the network
  • the time domain length of each radio frame configured by the sending node is related to the sequence and the length of the previous radio frame; as shown in FIG. 12, the radio frame time domain length sequence takes four elements as an example, but actually in each sequence.
  • the number of configurable elements includes, but is not limited to, four.
  • eNB1 selects a sequence ⁇ 5, 3, 2, 4 ⁇ in a radio frame time domain length sequence set
  • eNB2 selects a sequence ⁇ 2, 3, 4 in a sequence set, 5 ⁇ , then under the frame boundary offset in FIG. 12, eNB1 and eNB2 have the opportunity to preempt the channel in one sequence period, and the frame boundary offset in FIG. 11 by using the variable frame length sequence.
  • the two sending nodes can obtain the opportunity to preempt the channel.
  • the period of the same relative position of the CCA and the IDP in the sequence is 14 ms, which is still a small value, under certain frame boundaries or a shorter IDP configuration.
  • the first method is: if the network transmitting node cannot still preempt the channel at the end of the last radio frame of the sequence, the newly selected radio frame time domain length
  • the identifier of the time series length sequence of the radio frame in the sequence set notifies the network receiving node, but the signaling overhead is large
  • the second method is: the network sending node selects a sequence with a large number of elements to expand the period, for example, ⁇ 5, 3, 2, 4, 8, 10, 7, 1, 6, 9 ⁇
  • the third method is: the network sending node performs a cyclic shift or periodic extension of the selected radio frame time domain length sequence to generate a radio frame time domain.
  • the length sequence group, the time domain length of the subsequent radio frame is configured according to the radio frame time domain length sequence in the radio frame time domain length sequence group, for example, the sequence of the eNB1 sequence ⁇ 5, 3, 2, 4 ⁇ in FIG. 12 is left. After moving one bit, you can get ⁇ 3, 2, 4, 5 ⁇ , eNB1 The sequence ⁇ 2,3,4,5 ⁇ is rotated left by one bit to get ⁇ 3,4,5,2 ⁇ , and the cyclic shift is performed after the current sequence ends, so that a longer period sequence can be obtained, which is eNB2. To achieve the purpose of preempting channel resources, as shown in FIG.
  • eNB2 still cannot preempt the channel in the four radio frames of the first sequence, but preempts the channel in the next four radio frames that are cyclically shifted;
  • the channel resources are not occupied in a short period of time, but the effect of fair resource occupation can be achieved by cyclic shifting. If the listening node fails to successfully occupy the channel after performing cyclic shift, A sequence may be reselected from the radio frame time domain length sequence set for determining the time domain length of the next one or more radio frames.
  • the method for generating a radio frame time domain length sequence group according to the selected radio frame time domain length sequence is extended as in the prior art scheme 2, and the period in which the CCA and the IDP appear the same relative position is expanded, but compared with the current
  • the combination of the time domain length configuration of the plurality of radio frames and the cyclic shift in the method greatly increase the length of the period, so that the effect similar to the time domain length of the randomized radio frame can be approximated.
  • the network sending node can also be better implemented to better realize the CCA and IDP time domain location randomization.
  • the cyclic shift mode includes: a cyclic left shift, a right shift, and a shift of a bit, etc.
  • the method for determining, by the network sending node, the time domain length of the next one or more radio frames according to the time domain length of the current radio frame and the method for determining the next one or more radio frames according to the radio frame time domain length sequence, the occupied node and the occupied node The listening nodes select the time series length sequence of the radio frame to configure the time domain length of the radio frame, and the selected radio frame time domain length sequence may also not notify the occupied node (that is, still adopt the fixed frame time domain length configuration), and only requires detection.
  • the listening node selects the time series length sequence of the radio frame, and can also achieve the purpose of randomizing the relative positions of the CCA and the IDP.
  • All network sending nodes and network receiving nodes in the communication system know the radio frame time domain length sequence set, so the network sending node only needs to use RRC signaling to semi-statically concentrate the radio frame time domain length sequence in the radio frame time domain length.
  • the identification notification is sent to the network receiving node, and the network receiving node is connected.
  • the network receiving node performs synchronization detection in the sequence of the cyclically shifted next radio frame; the network sending node may not notify the network receiving node of the identifier of the radio frame time domain length sequence or the radio frame time domain length sequence group generation manner.
  • the network receiving node performs a blind detection synchronization channel, a pilot signal, a control channel, and the like at the beginning of each subframe, but if the network sending node sets the radio frame time domain length sequence identifier or the radio frame time domain length sequence group
  • the generating mode notifies the network receiving node that after receiving the identifier or the generating mode, the network receiving node only needs to perform blind detection at the starting position of each corresponding radio frame, and if the control information of the network sending node is not detected, the network sending is determined.
  • the node does not occupy the channel within the time of the current radio frame, and does not need to detect each subframe, which helps Detecting a low degree of complexity of the network reception node.
  • the network sending node may randomly select a radio frame time domain length sequence in the radio frame time domain length sequence set, or may select a specific radio frame time domain length sequence according to service requirements, for example, a higher priority.
  • service requirements for example, a higher priority.
  • a sequence with a long average time domain length is required, and the compatibility with the conventional one is considered.
  • the fixed frame length configuration allows a fixed frame length, such as ⁇ 10, 10, 10, 10 ⁇ , to be a sequence in the set.
  • the network receiving node in the embodiment of the present invention is mainly a base station or user equipment that can work on an unlicensed spectrum, where the base station can be a macro base station, a micro cell, a pico cell, a home base station, a remote radio head or a relay, etc.;
  • the device can be a mobile phone, a terminal device such as a laptop or a tablet that can access the LTE system.
  • the following is an example in which the network receiving node is a user equipment, but it is also applicable to a base station.
  • the base station is used as the network sending node, and the base station determines the time domain length of the next radio frame or the current radio frame on the unlicensed spectrum, and sends the information of the time domain length of the next one or more radio frames.
  • the user equipment receives the information, thereby obtaining the next one or more The time domain length of the line frame; or, when the base station selects the radio frame time domain length sequence from the radio frame time domain sequence sequence set, determines the time domain length of the next one or more radio frames according to the radio frame time domain length sequence, and
  • the identifier of the radio frame time domain length sequence is sent to the user equipment, the user equipment receives the identifier, and obtains a corresponding radio frame time domain length sequence from the radio frame time domain length sequence set according to the identifier, and the radio frame time domain length sequence Including a plurality of elements, the value of at least one element is not equal to the value of other elements, and the value of each element corresponds to the time domain length of one radio
  • the base station When the base station generates a radio frame time domain sequence sequence group according to the radio frame time domain length sequence, and sends the radio frame time domain length sequence group generation manner to the user equipment, the user equipment receives the generation manner, and according to the generation manner, the radio frame time The domain sequence is transformed to obtain the same radio frame time domain sequence group as the base station, and the time domain length of the next one or more radio frames is determined according to the radio frame time domain sequence group.
  • the frame header position of the next one or more radio frames may be determined, and the user equipment acquires the frame header position of the radio frame, which is helpful for determining part of the control information.
  • Time domain locations such as synchronization signals and broadcast signals, as shown in FIG. 14, for example, in Frequency Division Duplexing (FDD) mode, the synchronization signal always appears at the end of the first time slot of each radio frame.
  • FDD Frequency Division Duplexing
  • the user equipment If the user equipment knows the position of the frame header of the radio frame, it only needs to go to the frame header position to detect the synchronization signal; otherwise, if the user equipment does not acquire the time domain length of each radio frame, it needs to be in each The synchronization signal is detected on the subframe of the radio frame, resulting in an increase in detection complexity.
  • the detection part of the control information such as the physical downlink control channel (PDCCH) and the complexity of the pilot signal, may be reduced.
  • a frequency signal such as a Cell Specific Reference Signal (CRS)
  • CRS Cell Specific Reference Signal
  • the user equipment does not know. Whether the base station successfully occupies the channel to receive a certain radio frame, and therefore needs to be judged by the detection of the pilot signal and the control channel.
  • the user equipment detects the two signals, it can determine that the base station successfully occupies the channel to receive the current radio frame, and can perform subsequent The reception of the data, and vice versa, does not require receiving subsequent data on the radio frame. If the user equipment is able to obtain the frame header position of the radio frame, then only need to The pilot signal and the PDCCH may be detected in the first subframe of the radio frame. If the signals are not detected, it is determined that the subsequent subframe of the current radio frame is not occupied by the base station, and the current radio frame is not required. The subsequent subframes perform detection; if the user equipment does not know the time domain length of each radio frame, the pilot signal and the PDCCH are detected for each subframe to determine whether the base station occupies the subframe, thus increasing the user. The detection complexity of the device.
  • the user equipment may also implement rate matching of the last subframe of each radio frame by acquiring the time domain length of the next one or more radio frames. Since the FBE must enter the IDP after the COT, and the IDP time length is at least the COT time. 5%, on the other hand, the radio frame length is usually an integer number of subframes. Therefore, when the radio frame length is M subframes, the COT duration is usually not an integer number of subframes, but M-1 subframes plus several OFDM symbols, as shown in the figure.
  • the base station needs to configure the duration of the signal according to the ratio in each radio frame.
  • the user equipment can know the time domain length of each radio frame, Then, the number of OFDM symbols occupied by the signal in the last subframe of the radio frame can be calculated (for example, according to the mapping in the following table), thereby implementing rate matching, that is, decoding data according to the number of corresponding OFDM symbols;
  • rate matching that is, decoding data according to the number of corresponding OFDM symbols;
  • the time domain length of each radio frame is not known, and the last subframe is still decoded according to 14 OFDM symbols, which causes the last subframe to fail to receive.
  • the network sending node when the network sending node is a base station, the network receiving node may be a user equipment; when the network sending node is a user equipment, the network receiving node may be a base station or another user equipment.
  • the embodiment of the present invention further provides a terminal device.
  • a terminal device As shown in FIG. 17, for the convenience of description, only parts related to the embodiment of the present invention are shown. For details that are not disclosed, refer to the method part of the embodiment of the present invention.
  • the terminal may be any terminal device including a mobile phone, a tablet computer, a PDA (Personal Digital Assistant), a POS (Point of Sales), an in-vehicle computer, and the terminal is a mobile phone as an example:
  • FIG. 17 is a block diagram showing a partial structure of a mobile phone related to a terminal provided by an embodiment of the present invention.
  • the mobile phone includes: a radio frequency (RF) circuit 1710, a memory 1320, an input unit 1730, a display unit 1740, a sensor 1750, an audio circuit 1760, a wireless fidelity (WiFi) module 1770, and a processor 1780. And power supply 1790 and other components.
  • RF radio frequency
  • the structure of the handset shown in FIG. 17 does not constitute a limitation to the handset, and may include more or less components than those illustrated, or some components may be combined, or different components may be arranged.
  • the RF circuit 1710 can be used for receiving and transmitting signals during the transmission or reception of information or during a call. Specifically, after receiving the downlink information of the base station, the processor 1780 processes the data. In addition, the uplink data is designed to be sent to the base station. Generally, RF circuit 1710 includes, but is not limited to, an antenna, at least one amplifier, a transceiver, a coupler, a Low Noise Amplifier (LNA), a duplexer, and the like. In addition, RF circuitry 1710 can also communicate with the network and other devices via wireless communication. The above wireless communication may use any communication standard or protocol, including but not limited to Global System of Mobile communication (GSM), General Packet Radio Service (GPRS), Code Division Multiple Access (Code Division). Multiple Access (CDMA), Wideband Code Division Multiple Access (WCDMA), Long Term Evolution (LTE), E-mail, Short Messaging Service (SMS), and the like.
  • GSM Global System of Mobile communication
  • GPRS General Packet Radio Service
  • the memory 1720 can be used to store software programs and modules, and the processor 1780 executes various functional applications and data processing of the mobile phone by running software programs and modules stored in the memory 1720.
  • the memory 1720 may mainly include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application required for at least one function (such as a sound playing function, an image playing function, etc.), and the like; the storage data area may be stored according to Data created by the use of the mobile phone (such as audio data, phone book, etc.).
  • memory 1720 can include high speed random access memory, and can also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other volatile solid state storage device.
  • the input unit 1730 can be configured to receive input numeric or character information and to generate key signal inputs related to user settings and function controls of the handset.
  • the input unit 1730 may include a touch panel 1731 and other input devices 1732.
  • the touch panel 1731 also referred to as a touch screen, can collect touch operations on or near the user (such as the user using any suitable object such as a finger, a stylus, or the like)
  • the device is operated on the touch panel 1731 or in the vicinity of the touch panel 1731, and drives the corresponding connecting device according to a preset program.
  • the touch panel 1731 may include two parts: a touch detection device and a touch controller.
  • the touch detection device detects the touch orientation of the user, and detects a signal brought by the touch operation, and transmits the signal to the touch controller; the touch controller receives the touch information from the touch detection device, converts the touch information into contact coordinates, and sends the touch information.
  • the processor 1780 is provided and can receive commands from the processor 1780 and execute them.
  • the touch panel 1731 can be implemented in various types such as resistive, capacitive, infrared, and surface acoustic waves.
  • the input unit 1730 may also include other input devices 1732.
  • other input devices 1732 may include, but are not limited to, one or more of a physical keyboard, function keys (such as volume control buttons, switch buttons, etc.), trackballs, mice, joysticks, and the like.
  • the display unit 1740 can be used to display information input by the user or information provided to the user as well as various menus of the mobile phone.
  • the display unit 1740 can include a display panel 1741.
  • the display panel 1741 can be configured in the form of a liquid crystal display (LCD), an organic light-emitting diode (OLED), or the like.
  • the touch panel 1731 can cover the display panel 1741. After the touch panel 1731 detects a touch operation thereon or nearby, the touch panel 1731 transmits to the processor 1780 to determine the type of the touch event, and then the processor 1380 according to the touch event. The type provides a corresponding visual output on display panel 1741.
  • the touch panel 1731 and the display panel 1741 are two independent components to implement the input and input functions of the mobile phone, in some embodiments, the touch panel 1731 and the display panel 1741 may be integrated. Realize the input and output functions of the phone.
  • the handset can also include at least one type of sensor 1750, such as a light sensor, motion sensor, and other sensors.
  • the light sensor may include an ambient light sensor and a proximity sensor, wherein the ambient light sensor may adjust the brightness of the display panel 1741 according to the brightness of the ambient light, and the proximity sensor may close the display panel 1741 and/or when the mobile phone moves to the ear. Or backlight.
  • the accelerometer sensor can detect the magnitude of acceleration in all directions (usually three axes). When it is stationary, it can detect the magnitude and direction of gravity.
  • the mobile phone can be used to identify the gesture of the mobile phone (such as horizontal and vertical screen switching, related Game, magnetometer attitude calibration), vibration recognition related functions (such as pedometer, tapping), etc.; as for the mobile phone can also be configured with gyroscopes, barometers, hygrometers, thermometers, infrared sensors and other sensors, no longer Narration.
  • the gesture of the mobile phone such as horizontal and vertical screen switching, related Game, magnetometer attitude calibration
  • vibration recognition related functions such as pedometer, tapping
  • the mobile phone can also be configured with gyroscopes, barometers, hygrometers, thermometers, infrared sensors and other sensors, no longer Narration.
  • An audio circuit 1760, a speaker 1761, and a microphone 1762 can provide an audio interface between the user and the handset.
  • the audio circuit 1760 can transmit the converted electrical data of the received audio data to the speaker 1361, and convert it into a sound signal output by the speaker 1761; on the other hand, the microphone 1362 converts the collected sound signal into an electrical signal, by the audio circuit 1760. After receiving, it is converted into audio data, and then processed by the audio data output processor 1780, sent to the other mobile phone via the RF circuit 1710, or outputted to the memory 1720 for further processing.
  • WiFi is a short-range wireless transmission technology.
  • the mobile phone through the WiFi module 1770 can help users to send and receive e-mail, browse the web and access streaming media, etc. It provides users with wireless broadband Internet access.
  • FIG. 17 shows the WiFi module 1770, it can be understood that it does not belong to the essential configuration of the mobile phone, and may be omitted as needed within the scope of not changing the essence of the invention.
  • the processor 1780 is the control center of the handset, which connects various portions of the entire handset using various interfaces and lines, by executing or executing software programs and/or modules stored in the memory 1720, and invoking data stored in the memory 1720, The phone's various functions and processing data, so that the overall monitoring of the phone.
  • the processor 1780 may include one or more processing units; preferably, the processor 1780 may integrate an application processor and a modem processor, where the application processor mainly processes an operating system, a user interface, an application, and the like.
  • the modem processor primarily handles wireless communications. It will be appreciated that the above described modem processor may also not be integrated into the processor 1780.
  • the handset also includes a power source 1790 (such as a battery) that powers the various components.
  • a power source 1790 (such as a battery) that powers the various components.
  • the power source can be logically coupled to the processor 1780 via a power management system to manage charging, discharging, and power management functions through the power management system.
  • the mobile phone may further include a camera, a Bluetooth module, and the like, and details are not described herein again.
  • the sending module 103 of the network sending node may be implemented by the RF circuit 1710, and the obtaining module 201, the determining module 101, the configuration module 102, and the executing module 301 may be implemented by the processor 1780.
  • the receiving module 401 of the network receiving node may be implemented by the RF circuit 1710, and the obtaining module 402, the executing module 501, and the detecting module 601 may be implemented by the processor 1780.
  • 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.
  • a number of instructions are included to cause a computer device (which may be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods described in 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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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

L'invention concerne un procédé de transmission de données pour un réseau sans fil et un nœud de réseau, qui sont utilisés pour que le nœud de réseau configure la longueur de domaine temporel d'une trame sans fil sur un spectre sans licence, de sorte que différents nœuds de réseau puissent occuper un canal de manière à parvenir à l'équité de l'occupation des ressources réseau. Le procédé des modes de réalisation de la présente invention comprend les étapes suivantes: un nœud d'émission de réseau détermine la longueur de domaine temporel d'une ou plusieurs trames sans fil suivantes d'une trame sans fil courante sur un spectre sans licence; le nœud d'émission de réseau configure, selon la longueur de domaine temporel de la ou des plusieurs trames sans fil suivantes, la ou les trames sans fil suivantes; et lorsqu'un canal libre est détecté par l'intermédiaire d'un CCA, le nœud d'envoi de réseau envoie la ou les trames sans fil suivantes configurées à un nœud de réseau de réception.
PCT/CN2015/073001 2015-02-13 2015-02-13 Procédé de transmission de données pour réseau sans fil et nœud de réseau WO2016127391A1 (fr)

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CN201580002252.0A CN106171036B (zh) 2015-02-13 2015-02-13 无线网络的数据传输方法及网络节点
PCT/CN2015/073001 WO2016127391A1 (fr) 2015-02-13 2015-02-13 Procédé de transmission de données pour réseau sans fil et nœud de réseau

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CN110932829B (zh) * 2018-09-20 2022-04-01 维沃移动通信有限公司 非授权频段的传输时间指示方法、网络设备和终端
CN110086569B (zh) * 2019-04-03 2022-04-15 上海无线通信研究中心 车联网可变帧通信方法、终端及系统
US20230269772A1 (en) * 2020-09-02 2023-08-24 Qualcomm Incorporated Channel occupancy time sharing for frame-based equipment

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