WO2016119142A1 - Station de base, équipement utilisateur et procédé pour mettre en oeuvre un accès multiple avec écoute de porteuse (csma) au moyen d'un système de communication mobile - Google Patents

Station de base, équipement utilisateur et procédé pour mettre en oeuvre un accès multiple avec écoute de porteuse (csma) au moyen d'un système de communication mobile Download PDF

Info

Publication number
WO2016119142A1
WO2016119142A1 PCT/CN2015/071738 CN2015071738W WO2016119142A1 WO 2016119142 A1 WO2016119142 A1 WO 2016119142A1 CN 2015071738 W CN2015071738 W CN 2015071738W WO 2016119142 A1 WO2016119142 A1 WO 2016119142A1
Authority
WO
WIPO (PCT)
Prior art keywords
channel
secondary carrier
uplink
cca
time period
Prior art date
Application number
PCT/CN2015/071738
Other languages
English (en)
Chinese (zh)
Inventor
李秉肇
胡振兴
权威
苗金华
张戬
Original Assignee
华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to PCT/CN2015/071738 priority Critical patent/WO2016119142A1/fr
Priority to CN201580002049.3A priority patent/CN106031286B/zh
Publication of WO2016119142A1 publication Critical patent/WO2016119142A1/fr

Links

Images

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/04—Scheduled access

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to a base station, a user equipment, and a method for implementing LBT based on a mobile communication system.
  • Unlicensed Spectrum (English: Unlicensed Spectrum) refers to the public spectrum, which can be used by any organization or individual. However, when using the unlicensed spectrum, you need to follow the Listening After Talk (LBT) mechanism. That is, the communication device first monitors whether there are other communication devices transmitting data on the channel before sending the frame. If the channel is idle, The site can transmit data; otherwise, the communication device will not send data for the time being, but will avoid it after a period of time. Generally, the LBT needs to follow the Clear Channel Assessment (CCA) principle and the Extended CCA (ECCA) principle. The so-called CCA principle requires the communication device to at least monitor the channel for one CCA observation time window.
  • CCA Clear Channel Assessment
  • ECCA Extended CCA
  • the length of time, wherein the CCA observation time window is a predetermined length of time, such as 20 microseconds (unit: us). If the communication device does not monitor the carrier signal within the one CCA observation time window, the channel is considered to be an idle channel. can use. If the communication device listens to the carrier signal within this one CCA observation time window, then the channel is considered occupied and thus transitions to the ECCA phase. In the ECCA phase, the communication device generates an integer random number R, and then it is necessary to continuously listen to the R CCA observation time windows before using the channel at a channel idle point.
  • R integer random number
  • the second generation mobile communication system (English: 2nd Generation, 2G for short), the third generation mobile communication system (English: 3nd Generation, 3G for short), and the Long Term Evolution (LTE) system use the licensed spectrum. If the unlicensed spectrum is to be used also in the mobile communication system, the LBT mechanism must also be followed. However, the LBT mechanism is generally applied to wireless local area network technology (abbreviation: WLAN). If directly applied to a mobile communication system, the following problems occur:
  • the current LBT mechanism In the current LBT mechanism, User Equipment (UE) and wireless access The Access Point (AP) has the same function, and the two compete for the right to use the unlicensed spectrum at the same time.
  • UE User Equipment
  • AP The Access Point
  • the base station and the UE have respective transmission times and do not compete for channels at the same time. Therefore, the current LBT mechanism is not suitable for a mobile communication system having an independent uplink and downlink time period.
  • FIG. 1 it is a schematic diagram of a channel occupation conflict between multiple base stations.
  • the embodiments of the present invention provide a base station, a UE, and a method for implementing an LBT based on a mobile communication system, which are used to solve the problem that the current LBT mechanism is not suitable for a mobile communication system having an independent uplink and downlink time period, and multiple base stations or multiple
  • the UE may perform channel competition according to the LBT mechanism at the same time, which may cause a channel occupation conflict.
  • an embodiment of the present invention provides a base station, including:
  • a configuration unit configured to configure at least one secondary carrier for the UE, where the secondary carrier operates in an unlicensed frequency band
  • a determining unit configured to determine split information of the uplink and downlink time segments of the secondary carrier, where the split information of the uplink and downlink time segments includes split information of a downlink time segment and split information of an uplink time segment;
  • a processing unit configured to perform CCA or ECCA on the channel of the secondary carrier in a downlink time period according to the split information of the uplink and downlink time period, and stop performing CCA or ECCA on the channel of the secondary carrier in an uplink time period.
  • the split information of the uplink and downlink time segments further includes split information of a transition gap between uplink and downlink time segments;
  • the processing unit is further configured to:
  • the processing unit when the CCA is performed on the channel of the secondary carrier in the downlink time period, the processing unit is specifically configured to:
  • the carrier signal is monitored within a predetermined duration, confirm that the channel of the secondary carrier is occupied, and perform ECCA on the channel of the secondary carrier;
  • the channel of the secondary carrier is occupied.
  • the processing unit before the ECCA is performed on the channel of the secondary carrier in the downlink time period, the processing unit is further configured to:
  • the processing unit is specifically configured to:
  • the CCA count is performed based on the initial CCA count value, and the channel of the secondary carrier is occupied after the initial CCA count value is reduced to zero.
  • an embodiment of the present invention provides a UE, including:
  • a first determining unit configured to determine at least one secondary carrier configured by the base station for the UE, where the secondary carrier operates in an unlicensed frequency band;
  • a second determining unit configured to determine split information of the uplink and downlink time segments of the secondary carrier, where the split information of the uplink and downlink time segments includes split information of a downlink time segment and split information of an uplink time segment;
  • a processing unit configured to perform CCA or ECCA on the channel of the secondary carrier in an uplink time period according to the split information of the uplink and downlink time period, and stop performing CCA or ECCA on the channel of the secondary carrier in a downlink time period.
  • the split information of the uplink and downlink time segments further includes split information of a transition gap between uplink and downlink time segments;
  • the processing unit is further configured to:
  • the processing unit when the CCA is performed on the channel of the secondary carrier in an uplink time period, the processing unit is specifically configured to:
  • the carrier signal is monitored within a predetermined duration, confirm that the channel of the secondary carrier is occupied, and perform ECCA on the channel of the secondary carrier;
  • the channel of the secondary carrier is occupied.
  • the processing unit is further configured to:
  • the processing unit is specifically configured to:
  • the CCA count is performed based on the initial CCA count value, and the channel of the secondary carrier is occupied after the initial CCA count value is reduced to zero.
  • an embodiment of the present invention provides a base station, including:
  • An occupied unit configured to occupy a channel of a secondary carrier, where the secondary carrier operates in an unlicensed frequency band
  • Activating unit configured to start a collision detection gap at an Nth symbol after the channel of the secondary carrier is occupied
  • a processing unit configured to: in the conflict detection gap, monitor whether there is a carrier signal sent by another base station on a channel of the secondary carrier, and the strength of the carrier signal is greater than a preset threshold; if yes, stop occupying The channel of the secondary carrier; otherwise, the channel of the secondary carrier continues to be occupied.
  • the N is an integer random number; or,
  • the N is a preset integer value
  • the N is determined according to a cell identifier corresponding to the secondary carrier.
  • an embodiment of the present invention provides a UE, including:
  • An occupied unit configured to occupy a channel of a secondary carrier, where the secondary carrier operates in an unlicensed frequency band
  • Activating unit configured to start a collision detection gap at an Nth symbol after the channel of the secondary carrier is occupied
  • a processing unit configured to: in the conflict detection gap, monitor whether there is a carrier signal sent by another UE on a channel of the secondary carrier, and the strength of the carrier signal is greater than a preset threshold; if yes, stop occupying The channel of the secondary carrier; otherwise, the channel of the secondary carrier continues to be occupied.
  • the N is an integer random number; or,
  • the N is a preset integer value
  • the N is determined according to a cell identifier corresponding to the secondary carrier.
  • an embodiment of the present invention provides a base station, including:
  • a processor configured to configure at least one secondary carrier for the UE, where the secondary carrier operates in an unlicensed frequency band, and determines split information of the uplink and downlink time segments of the secondary carrier, where the split information of the uplink and downlink time segments includes a downlink time segment The split information and the split information of the uplink time period; performing CCA or ECCA on the channel of the secondary carrier in the downlink time period according to the split information of the uplink and downlink time period, and stopping the secondary carrier in the uplink time period The channel performs CCA or ECCA.
  • the split information of the uplink and downlink time segments further includes split information of a transition gap between uplink and downlink time segments;
  • the processor is further configured to:
  • the processor when performing CCA on a channel of the secondary carrier in a downlink time period, is specifically configured to:
  • the carrier signal is monitored within a predetermined duration, confirm that the channel of the secondary carrier is occupied, and perform ECCA on the channel of the secondary carrier;
  • the channel of the secondary carrier is occupied.
  • the processor before performing the ECCA on the channel of the secondary carrier in the downlink time period, the processor is further configured to:
  • the processor is specifically configured to:
  • the CCA count is performed based on the initial CCA count value, and the channel of the secondary carrier is occupied after the initial CCA count value is reduced to zero.
  • the embodiment of the present invention provides a UE, including:
  • a processor configured to determine at least one secondary carrier configured by the base station for the UE, where the secondary carrier operates in an unlicensed frequency band; determining split information of the uplink and downlink time segments of the secondary carrier, and dividing the uplink and downlink time segments
  • the information includes the split information of the downlink time period and the split information of the uplink time period.
  • the CCA or ECCA is performed on the channel of the secondary carrier in the uplink time period according to the split information of the uplink and downlink time segments, and stops in the downlink time period.
  • the channel of the secondary carrier performs CCA or ECCA.
  • the split information of the uplink and downlink time segments further includes split information of a transition gap between uplink and downlink time segments;
  • the processor is further configured to:
  • the processor when the CCA is performed on the channel of the secondary carrier in an uplink time period, the processor is specifically configured to:
  • the carrier signal is monitored within a predetermined duration, confirm that the channel of the secondary carrier is occupied, and perform ECCA on the channel of the secondary carrier;
  • the channel of the secondary carrier is occupied.
  • the processor before the ECCA is performed on the channel of the secondary carrier in an uplink time period, the processor Also used for:
  • the processor is specifically configured to:
  • the CCA count is performed based on the initial CCA count value, and the channel of the secondary carrier is occupied after the initial CCA count value is reduced to zero.
  • an embodiment of the present invention provides a base station, including:
  • a processor configured to occupy a channel of a secondary carrier, where the secondary carrier operates in an unlicensed frequency band; a collision detection gap is initiated at an Nth symbol after the channel of the secondary carrier is occupied; Detecting, on the channel of the secondary carrier, whether there is a carrier signal sent by another base station, and the strength of the carrier signal is greater than a preset threshold; if yes, stopping the channel occupying the secondary carrier; otherwise, continuing to occupy the channel The channel of the secondary carrier.
  • the N is an integer random number; or,
  • the N is a preset integer value
  • the N is determined according to a cell identifier corresponding to the secondary carrier.
  • an embodiment of the present invention provides a UE, including:
  • a processor configured to occupy a channel of a secondary carrier, where the secondary carrier operates in an unlicensed frequency band; a collision detection gap is initiated at an Nth symbol after the channel of the secondary carrier is occupied; Detecting, on the channel of the secondary carrier, whether there is a carrier signal sent by another UE, and the strength of the carrier signal is greater than a preset threshold; if yes, stopping the channel occupying the secondary carrier; otherwise, continuing to occupy the channel The channel of the secondary carrier.
  • the N is an integer random number; or,
  • the N is a preset integer value
  • the N is determined according to a cell identifier corresponding to the secondary carrier.
  • an embodiment of the present invention provides a method for implementing an LBT based on a mobile communication system, including:
  • the base station configures at least one secondary carrier for the UE, where the secondary carrier operates in an unlicensed frequency band;
  • the base station determines the split information of the uplink and downlink time segments of the secondary carrier, where the split information of the uplink and downlink time segments includes split information of the downlink time segment and split information of the uplink time segment;
  • the base station performs CCA or ECCA on the channel of the secondary carrier in the downlink time period according to the split information of the uplink and downlink time period, and stops performing CCA or ECCA on the channel of the secondary carrier in the uplink time period.
  • the split information of the uplink and downlink time segments further includes split information of a transition gap between uplink and downlink time segments;
  • the method further includes:
  • the base station stops performing CCA or ECCA on the channel of the secondary carrier in the transition gap.
  • performing CCA on the channel of the secondary carrier in a downlink time period includes:
  • the carrier signal is monitored within a predetermined duration, confirm that the channel of the secondary carrier is occupied, and perform ECCA on the channel of the secondary carrier;
  • the channel of the secondary carrier is occupied.
  • the method before performing the ECCA on the channel of the secondary carrier in the downlink time period, the method further includes:
  • Performing ECCA on the channel of the secondary carrier includes:
  • the CCA count is performed based on the initial CCA count value, and the channel of the secondary carrier is occupied after the initial CCA count value is reduced to zero.
  • an embodiment of the present invention provides a method for implementing LBT based on a mobile communication system.
  • the UE determines the split information of the uplink and downlink time segments of the secondary carrier, where the split information of the uplink and downlink time segments includes split information of the downlink time segment and split information of the uplink time segment;
  • the UE performs CCA or ECCA on the channel of the secondary carrier in an uplink time period according to the split information of the uplink and downlink time period, and stops performing CCA or ECCA on the channel of the secondary carrier in a downlink time period.
  • the split information of the uplink and downlink time segments further includes split information of a transition gap between uplink and downlink time segments;
  • the method further includes:
  • the UE stops performing CCA or ECCA on the channel of the secondary carrier in the transition gap.
  • performing CCA on the channel of the secondary carrier in an uplink time period includes:
  • the carrier signal is monitored within a predetermined duration, confirm that the channel of the secondary carrier is occupied, and perform ECCA on the channel of the secondary carrier;
  • the channel of the secondary carrier is occupied.
  • the method before performing the ECCA on the channel of the secondary carrier in the uplink time period, the method further includes:
  • Performing ECCA on the channel of the secondary carrier includes:
  • the CCA count is performed based on the initial CCA count value, and the channel of the secondary carrier is occupied after the initial CCA count value is reduced to zero.
  • an embodiment of the present invention provides a method for implementing LBT based on a mobile communication system. Law, including:
  • the base station occupies a channel of the secondary carrier, and the secondary carrier operates in an unlicensed frequency band;
  • the base station starts a collision detection gap at the Nth symbol after the channel of the secondary carrier is occupied;
  • the base station monitors whether there is a carrier signal sent by another base station on the channel of the secondary carrier, and the strength of the carrier signal is greater than a preset threshold;
  • the channel of the secondary carrier continues to be occupied.
  • the N is an integer random number; or,
  • the N is a preset integer value
  • the N is determined according to a cell identifier corresponding to the secondary carrier.
  • an embodiment of the present invention provides a method for implementing an LBT based on a mobile communication system, including:
  • the UE occupies a channel of the secondary carrier, and the secondary carrier operates in an unlicensed frequency band;
  • the UE starts a collision detection gap at the Nth symbol after the channel of the secondary carrier is occupied;
  • the UE monitors whether there is a carrier signal sent by another UE on the channel of the secondary carrier, and the strength of the carrier signal is greater than a preset threshold;
  • the channel of the secondary carrier continues to be occupied.
  • the N is an integer random number; or,
  • the N is a preset integer value
  • the N is determined according to a cell identifier corresponding to the secondary carrier.
  • the contention period between the UE and the base station is divided according to the uplink and downlink transmission segments, and the UE is only allowed to compete for the unlicensed spectrum in the uplink time period, and the base station only competes in the downlink time segment.
  • the unlicensed spectrum enables the LBT mechanism to be more efficiently applied to independent mobile communication systems in the uplink and downlink time periods.
  • the channel is monitored in the collision detection gap whether there is a carrier signal sent by another base station or the UE, and the subsequent signal is determined according to the monitoring result. Whether to continue to transmit signals, thereby reducing the probability of channel occupation conflict between multiple base stations or multiple UEs.
  • 1 is a schematic diagram of channel occupancy conflicts between multiple base stations in the prior art
  • FIGS. 2A, 2B, and 2C are system architecture diagrams of an application scenario according to an embodiment of the present invention.
  • FIG. 3 is a schematic structural diagram of a base station implementing an LBT mechanism according to an embodiment of the present disclosure
  • FIG. 4 is a schematic structural diagram of a UE implementing an LBT mechanism according to an embodiment of the present disclosure
  • FIG. 5 is a schematic structural diagram of a base station for solving a channel occupation conflict problem occurring between base stations according to an embodiment of the present disclosure
  • FIG. 6 is a schematic structural diagram of a UE for solving a channel occupation conflict problem occurring between UEs according to an embodiment of the present disclosure
  • FIG. 7 is a schematic structural diagram of another base station implementing an LBT mechanism according to an embodiment of the present disclosure.
  • FIG. 8 is a schematic structural diagram of another UE implementing an LBT mechanism according to an embodiment of the present disclosure.
  • FIG. 9 is a schematic structural diagram of another base station for solving a channel occupation conflict problem occurring between base stations according to an embodiment of the present disclosure.
  • FIG. 10 is a schematic structural diagram of another UE for solving a channel occupation conflict problem occurring between UEs according to an embodiment of the present disclosure
  • FIG. 11 is a flowchart of a method for implementing a base station side of an LBT mechanism according to an embodiment of the present invention
  • FIG. 12 is a schematic diagram of a base station regenerating a random number as an initial CCA count value in a downlink time period according to an embodiment of the present disclosure
  • FIG. 13 is a schematic diagram of a CCA count value recorded by a base station as an initial CCA count value in a downlink time period according to an embodiment of the present disclosure
  • FIG. 14 is a flowchart of a method for implementing a UE side of an LBT mechanism according to an embodiment of the present disclosure
  • FIG. 15 is a schematic diagram of a UE regenerating a random number in an uplink time period as an initial CCA count value according to an embodiment of the present disclosure
  • FIG. 16 is a schematic diagram of a CCA count value recorded by a UE in an uplink time period as an initial CCA count value according to an embodiment of the present disclosure
  • FIG. 17 is a flowchart of a method for solving a channel occupation conflict problem occurring between base stations according to an embodiment of the present invention.
  • FIG. 18 is a schematic diagram of an effect of reducing a probability of channel occupation conflict occurring between base stations according to an embodiment of the present invention.
  • FIG. 19 is a flowchart of a method for resolving a channel occupation conflict problem occurring between UEs according to an embodiment of the present invention.
  • FIG. 20 is a schematic diagram of an effect of reducing a channel occupation collision probability occurring between UEs according to an embodiment of the present invention.
  • the embodiment of the present invention provides a base station, a UE, and a method for implementing an LBT based on a mobile communication system, and divides a contention period between a UE and a base station according to an uplink and downlink transmission segment, and stipulates that the UE only competes for an unlicensed spectrum in an uplink time period, and the base station only The downlink time period competes with the unlicensed spectrum, so that the LBT mechanism can be more effectively applied to the uplink and downlink time period independent mobile communication systems.
  • the embodiment of the present invention further provides a base station, a UE, and a method for implementing an LBT based on a mobile communication system.
  • the collision detection gap is determined by determining a collision detection gap (English: Collision Detection Gap). Whether the channel has a carrier signal sent by another base station, and determining whether to continue to transmit the signal according to the monitoring result, thereby reducing the probability of occurrence of channel occupation conflict between multiple base stations or multiple UEs.
  • Scenario 1 As shown in FIG. 2A, for a single base station communication scenario in an LTE system, the UE is connected to the core network through a single base station, and the base station is directly connected to the core network.
  • Scenario 2 Referring to FIG. 2B, the multi-base station communication scenario in the LTE system, the UE passes multiple The base station is connected to the core network, and a plurality of base stations are connected, and at least one of the plurality of base stations is directly connected to the core network.
  • Scenario 3 Referring to FIG. 2C, for communication scenarios in other systems (such as 2G, 3G, etc.), the UE is connected through the base station and the base station controller, and the base station controller is connected to the core network.
  • the UE is connected through the base station and the base station controller, and the base station controller is connected to the core network.
  • the UE which may also be referred to as a mobile phone, a mobile terminal or a mobile device, includes a wireless transceiver function, and can cooperate with the network device to provide a communication service for the user.
  • the base station may be an evolved node in an LTE system (English: eNodeB, abbreviated as eNB), or may be a radio network controller (English: Radio Network Controller, RNC for short) in a 3G system, or in a 2G system.
  • Base station controller (English: Base Station Controller, referred to as: BSC). It is used to receive data sent by the UE and send it to the base station controller, the core network device, or the corresponding primary base station.
  • an embodiment of the present invention provides a base station 3, which can be applied to an uplink and downlink time period independent mobile communication system, and the base station 3 includes:
  • the configuration unit 31 is configured to configure at least one secondary carrier for the UE, where the secondary carrier operates in an unlicensed frequency band.
  • the determining unit 32 is configured to determine split information of the uplink and downlink time segments of the secondary carrier, where the split information of the uplink and downlink time segments includes split information of the downlink time segment and split information of the uplink time segment.
  • the processing unit 33 is configured to perform CCA or ECCA on the channel of the secondary carrier in a downlink time period according to the split information of the uplink and downlink time period, and stop performing CCA or ECCA on the channel of the secondary carrier in an uplink time period.
  • the split information of the uplink and downlink time segments may further include split information of a transition gap (English: GAP) between uplink and downlink time segments.
  • GAP transition gap
  • the processing unit 33 is further configured to: stop, on the conversion gap, the secondary carrier The channel performs CCA or ECCA.
  • the processing unit 33 is specifically configured to: monitor the channel of the secondary carrier in a downlink time period; if the carrier is monitored within a predetermined time period And confirming that the channel of the secondary carrier is occupied, and performing ECCA on the channel of the secondary carrier; if the carrier signal is not monitored within a predetermined duration, occupying the channel of the secondary carrier.
  • the processing unit 133 is further configured to: record the CCA count value of the end time of the previous downlink time period.
  • the processing unit 33 is specifically configured to: generate an integer random number, as an initial CCA count value, or a CCA that will record the end time of the previous downlink time period.
  • the count value is taken as the initial CCA count value; the CCA count is performed according to the initial CCA count value, and the channel of the secondary carrier is occupied after the initial CCA count value is reduced to zero.
  • the so-called CCA count may be sequentially decremented according to the following procedure until the initial CCA count value is reduced to zero: at the end of each predetermined duration, it is determined whether the carrier signal is monitored within the predetermined duration of the end. If yes, the CCA count value is decremented by one. Otherwise, the CCA count value is kept unchanged.
  • Embodiment 1 provides a base station capable of implementing an LBT mechanism in an uplink and downlink time independent mobile communication system.
  • an embodiment of the present invention provides a UE4, which can be applied to an uplink and downlink time-segment independent mobile communication system, where the UE4 includes:
  • the first determining unit 41 is configured to determine at least one secondary carrier configured by the base station for the UE, where the secondary carrier operates in an unlicensed frequency band.
  • the second determining unit 42 is configured to determine split information of the uplink and downlink time segments of the secondary carrier, where the split information of the uplink and downlink time segments includes split information of the downlink time segment and split information of the uplink time segment.
  • the processing unit 43 is configured to: according to the split information of the uplink and downlink time segments, in an uplink time period
  • the channel of the secondary carrier performs CCA or ECCA, and stops performing CCA or ECCA on the channel of the secondary carrier in a downlink time period.
  • the split information of the uplink and downlink time segments further includes split information of a transition gap between uplink and downlink time segments.
  • the processing unit 43 is further configured to: stop performing CCA or ECCA on the channel of the secondary carrier in the conversion gap.
  • the processing unit 43 is specifically configured to: monitor the channel of the secondary carrier in an uplink time period; if the carrier is monitored within a predetermined time period And confirming that the channel of the secondary carrier is occupied, and performing ECCA on the channel of the secondary carrier; if the carrier signal is not monitored within a predetermined duration, occupying the channel of the secondary carrier.
  • the processing unit 43 is further configured to: record the CCA count value of the end time of the previous uplink time period.
  • the processing unit 43 when performing ECCA on the channel of the secondary carrier, is specifically configured to: generate an integer random number, as an initial CCA count value, or a CCA that will record the end time of the previous uplink time period.
  • the count value is taken as the initial CCA count value; the CCA count is performed according to the initial CCA count value, and the channel of the secondary carrier is occupied after the initial CCA count value is reduced to zero.
  • the so-called CCA count may be sequentially decremented according to the following procedure until the initial CCA count value is reduced to zero: at the end of each predetermined duration, it is determined whether the carrier signal is monitored within the predetermined duration of the end. If yes, the CCA count value is decremented by one. Otherwise, the CCA count value is kept unchanged.
  • the foregoing embodiment 2 provides a UE that can implement an LBT mechanism in an uplink and downlink independent mobile communication system.
  • an embodiment of the present invention provides a base station 5, which can solve the problem of channel occupation conflict between base stations, where the base station 5 includes:
  • the occupant unit 51 is configured to occupy a channel of the secondary carrier, and the secondary carrier operates in an unlicensed frequency band.
  • the initiating unit 52 is configured to start a collision detection gap at the Nth symbol after the channel of the secondary carrier is occupied.
  • the processing unit 53 is configured to: in the conflict detection gap, monitor whether there is a carrier signal sent by another base station on the channel of the secondary carrier, and the strength of the carrier signal is greater than a preset threshold; if yes, stop occupying The channel of the secondary carrier; otherwise, the channel of the secondary carrier continues to be occupied.
  • the N is an integer random number; or, the N is a preset integer value; or, the N is determined according to a cell identifier corresponding to the secondary carrier.
  • Embodiment 3 provides a base station, which can reduce the probability of occurrence of channel occupation conflict before multiple base stations after the LBT mechanism is applied to the mobile communication system.
  • the embodiment of the present invention provides a UE6, which is used to solve the problem of channel occupation conflict between UEs.
  • the UE6 includes:
  • the occupation unit 61 is configured to occupy a channel of the secondary carrier, and the secondary carrier operates in an unlicensed frequency band.
  • the initiating unit 62 is configured to start a collision detection gap at the Nth symbol after the channel of the secondary carrier is occupied.
  • the processing unit 63 is configured to: in the conflict detection gap, monitor whether there is a carrier signal sent by another UE on the channel of the secondary carrier, and the strength of the carrier signal is greater than a preset threshold; if yes, stop occupying The channel of the secondary carrier; otherwise, the channel of the secondary carrier continues to be occupied.
  • the N is an integer random number; or, the N is a preset integer value; or, the N is determined according to a cell identifier corresponding to the secondary carrier.
  • the foregoing embodiment 4 provides a UE, which can reduce the probability that a channel occupation conflict occurs before multiple UEs after the LBT mechanism is applied to the mobile communication system.
  • an embodiment of the present invention provides a base station 7 that can be applied to an uplink and downlink time-segment independent mobile communication system, where the base station 7 includes:
  • the processor 71 is configured to configure at least one secondary carrier for the UE, where the secondary carrier operates in an unlicensed frequency band, and determine split information of the uplink and downlink time segments of the secondary carrier, where the uplink and downlink time segments are mapped.
  • the sub-information includes the split information of the downlink time segment and the split information of the uplink time period; and according to the split information of the uplink and downlink time segments, perform CCA or ECCA on the channel of the secondary carrier in the downlink time period, and stop in the uplink time period. Performing CCA or ECCA on the channel of the secondary carrier.
  • the split information of the uplink and downlink time segments further includes split information of a transition gap between uplink and downlink time segments.
  • the processor 71 is further configured to stop performing CCA or ECCA on the channel of the secondary carrier in the conversion gap.
  • the processor 171 is specifically configured to: monitor the channel of the secondary carrier in a downlink time period; if the carrier is monitored within a predetermined time period And confirming that the channel of the secondary carrier is occupied, and performing ECCA on the channel of the secondary carrier; if the carrier signal is not monitored within a predetermined duration, occupying the channel of the secondary carrier.
  • the processor 71 before performing the ECCA on the channel of the secondary carrier in the downlink time segment, is further configured to: record the CCA count value of the end time of the previous downlink time period.
  • the processor 71 when the ECCA is performed on the channel of the secondary carrier, the processor 71 is specifically configured to: generate an integer random number, as an initial CCA count value, or a CCA that will record the end time of the previous downlink time period. The count value is taken as the initial CCA count value; the CCA count is performed according to the initial CCA count value, and the channel of the secondary carrier is occupied after the initial CCA count value is reduced to zero.
  • the so-called CCA count may be sequentially decremented according to the following procedure until the initial CCA count value is reduced to zero: at the end of each predetermined duration, it is determined whether the carrier signal is monitored within the predetermined duration of the end. If yes, the CCA count value is decremented by one. Otherwise, the CCA count value is kept unchanged.
  • the foregoing fifth embodiment provides a base station capable of implementing an LBT mechanism in an uplink and downlink time independent mobile communication system.
  • the embodiment of the present invention provides a UE8, which can be applied to an uplink and downlink time-segment independent mobile communication system, and the UE8 includes:
  • the processor 81 is configured to determine at least one secondary carrier configured by the base station for the UE, where the secondary carrier And the splitting information of the uplink and downlink time segments, where the split information of the uplink and downlink time segments includes the split information of the downlink time segment and the split information of the uplink time segment;
  • the division information of the time period performs CCA or ECCA on the channel of the secondary carrier in the uplink time period, and stops performing CCA or ECCA on the channel of the secondary carrier in the downlink time period.
  • the split information of the uplink and downlink time segments further includes split information of a transition gap between uplink and downlink time segments.
  • the processor 81 is further configured to stop performing CCA or ECCA on the channel of the secondary carrier in the transition gap.
  • the processor 181 is specifically configured to: monitor the channel of the secondary carrier in an uplink time period; if the carrier is monitored within a predetermined time period And confirming that the channel of the secondary carrier is occupied, and performing ECCA on the channel of the secondary carrier; if the carrier signal is not monitored within a predetermined duration, occupying the channel of the secondary carrier.
  • the processor 81 is further configured to: record a CCA count value of the end time of the previous uplink time period.
  • the processor 81 when the ECCA is performed on the channel of the secondary carrier, the processor 81 is specifically configured to: generate an integer random number, as an initial CCA count value, or a CCA that will record the end time of the previous uplink time period. The count value is taken as the initial CCA count value; the CCA count is performed according to the initial CCA count value, and the channel of the secondary carrier is occupied after the initial CCA count value is reduced to zero.
  • the so-called CCA count may be sequentially decremented according to the following procedure until the initial CCA count value is reduced to zero: at the end of each predetermined duration, it is determined whether the carrier signal is monitored within the predetermined duration of the end. If yes, the CCA count value is decremented by one. Otherwise, the CCA count value is kept unchanged.
  • the foregoing embodiment 6 provides a UE capable of implementing an LBT mechanism in an uplink and downlink time independent mobile communication system.
  • an embodiment of the present invention provides a base station 9 for solving a message between base stations.
  • the channel occupation conflict problem the base station 9 includes:
  • the processor 91 is configured to occupy a channel of a secondary carrier, where the secondary carrier operates in an unlicensed frequency band, and initiate a collision detection gap at an Nth symbol after the channel of the secondary carrier is occupied; In the gap, whether there is a carrier signal sent by another base station on the channel of the secondary carrier and the strength of the carrier signal is greater than a preset threshold; if yes, stopping the channel occupying the secondary carrier; otherwise, continuing to occupy The channel of the secondary carrier.
  • the N is an integer random number; or, the N is a preset integer value; or, the N is determined according to a cell identifier corresponding to the secondary carrier.
  • the foregoing embodiment 11 provides a base station, which can reduce the probability of occurrence of channel occupation conflict before multiple base stations after the LBT mechanism is applied to the mobile communication system.
  • an embodiment of the present invention provides a UE 10, which is used to solve a channel occupation conflict problem between UEs, where the UE 10 includes
  • the processor 101 is configured to occupy a channel of a secondary carrier, where the secondary carrier operates in an unlicensed frequency band, and initiate a collision detection gap at an Nth symbol after the channel of the secondary carrier is occupied; In the gap, whether there is a carrier signal sent by another UE on the channel of the secondary carrier, and the strength of the carrier signal is greater than a preset threshold; if yes, stopping the channel occupying the secondary carrier; otherwise, continuing to occupy The channel of the secondary carrier.
  • the N is an integer random number; or, the N is a preset integer value; or, the N is determined according to a cell identifier corresponding to the secondary carrier.
  • the implementation process of the base station side is as follows:
  • Step 1101 The base station configures at least one secondary carrier for the UE, and the secondary carrier operates in an unlicensed frequency band.
  • the secondary carrier is a cell managed by the base station, and the cell can only be configured to work as a secondary carrier.
  • Step 1102 The base station determines the split information of the uplink and downlink time segments of the secondary carrier, where the split information of the uplink and downlink time segments includes split information of the downlink time segment and split information of the uplink time segment.
  • the split information of the uplink and downlink time segments may further include split information of a transition gap between uplink and downlink time segments.
  • the split information of the uplink and downlink time segments may be pre-configured in the UE, and the base station may be informed according to the indication information sent by the UE, or may be notified to the UE after being configured by the base station.
  • Step 1103 The base station performs CCA or ECCA on the channel of the secondary carrier in a downlink time period according to the split information of the uplink and downlink time period, and stops performing CCA or ECCA on the channel of the secondary carrier in an uplink time period.
  • the base station also needs to stop performing CCA or ECCA on the channel of the secondary carrier in the transition gap.
  • the base station When the first time enters the downlink time period, the base station first performs CCA on the channel of the secondary carrier.
  • the specific process is: in the downlink time period, the base station starts the CCA, and starts to monitor the channel of the secondary carrier, if it is scheduled. If the carrier signal is monitored on the channel of the secondary carrier, the base station confirms that the channel of the secondary carrier is occupied, and performs ECCA on the channel of the secondary carrier; if no carrier signal is detected within a predetermined duration, Then, the base station occupies a channel of the secondary carrier.
  • the predetermined duration mentioned here is the length of time of a CCA observation time window, such as 20us.
  • an integer random number R is first generated as the initial CCA count value.
  • the channel is considered to be usable, and the predetermined duration is The length of time a CCA observes the time window. Specifically, when the base station does not detect the carrier signal in a CCA observation time window, the current CCA count value is decremented by one, and when the carrier signal is monitored within a CCA observation time window, the current CCA count is maintained. The value does not change. Further, after the base station decrements the CCA count value by one, it also determines whether the subtracted CCA count value is zero. If it is determined that the CCA count value is not zero, the CCA count is continued based on the CCA count value, if it is determined If the CCA count value is zero, the channel of the secondary carrier is occupied.
  • the base station may regenerate an integer random number as an initial CCA count value after the start of the next downlink time period, and perform CCA counting according to the initial CCA count value, and occupy the auxiliary after the initial CCA count value is reduced to zero.
  • the channel of the carrier may regenerate an integer random number as an initial CCA count value after the start of the next downlink time period, and perform CCA counting according to the initial CCA count value, and occupy the auxiliary after the initial CCA count value is reduced to zero.
  • the so-called CCA count may be sequentially decremented according to the following procedure until the initial CCA count value is reduced to zero: at the end of each predetermined duration, it is determined whether the carrier signal is monitored within the predetermined duration of the end. If yes, the CCA count value is decremented by one. Otherwise, the CCA count value is kept unchanged.
  • the base station performs a CCA failure to enter the ECCA phase and the random number obtained in the ECCA phase is 5, and the CCA counts at the end of the current downlink period.
  • the base station regenerates a random number after the start of the next downlink time period. If it is 4, the base station restarts channel monitoring from the state where the CCA count value is 4.
  • the base station may also record the previous downlink time before continuing to perform ECCA on the channel of the secondary carrier in the next downlink time period.
  • the base station After the start of the next downlink time period, the base station records the CCA count value of the previous downlink time period end time as the initial CCA count value, and performs CCA counting according to the initial CCA count value, when the initial CCA count value
  • the base station stops performing CCA or ECCA in a predetermined uplink time period, and starts CCA or ECCA in a predetermined downlink time period.
  • the base station performs CCA failure and enters the ECCA phase and the random number obtained in the ECCA phase is 5, which means that the initial value of the CCA count value is 5, and the base station needs to listen to 5 idle CCA observation time windows (for example, 20 us) to occupy channel.
  • idle CCA observation time windows for example, 20 us
  • the base station records the CCA count 3 before the start of the next downlink time period, and at the beginning of the next downlink time period, The base station continues to perform channel monitoring from a state where the CCA count value is three.
  • the foregoing embodiment 9 divides the contention period of the base station according to the uplink and downlink transmission segments, and specifies that the base station competes for the unlicensed spectrum only in the downlink time period, so that the LBT mechanism can be more effectively applied to the uplink and downlink time period independent mobile communication system.
  • the implementation process of the UE side is as follows:
  • Step 1401 The UE determines at least one secondary carrier configured by the base station for the UE, where the secondary carrier operates in an unlicensed frequency band.
  • the secondary carrier is a cell managed by the base station, and the cell can only be configured to work as a secondary carrier.
  • Step 1402 The UE determines the split information of the uplink and downlink time segments of the secondary carrier, where the split information of the uplink and downlink time segments includes split information of the downlink time segment and split information of the uplink time segment.
  • the split information of the uplink and downlink time segments may further include split information of a transition gap between uplink and downlink time segments.
  • the split information of the uplink and downlink time segments may be pre-configured in the UE, or may be configured by the UE to receive configuration information sent by the base station, and determined according to the configuration information.
  • Step 1403 The UE performs CCA or ECCA on the channel of the secondary carrier in an uplink time period according to the split information of the uplink and downlink time period, and stops performing CCA or ECCA on the channel of the secondary carrier in a downlink time period.
  • the UE also needs to stop performing CCA or ECCA on the channel of the secondary carrier in the transition gap.
  • the UE When the UE enters the uplink time period for the first time, the UE first performs CCA on the channel of the secondary carrier.
  • the specific process is: in the uplink time period, the UE starts the CCA, and starts to monitor the channel of the secondary carrier, if it is scheduled. If the carrier signal is monitored on the channel of the secondary carrier, the UE confirms that the channel of the secondary carrier is occupied, and performs ECCA on the channel of the secondary carrier; If the carrier signal is not monitored within the duration, the UE occupies the channel of the secondary carrier.
  • the predetermined duration described here is the length of time of a CCA observation time window.
  • an integer random number R is first generated as the initial CCA count value.
  • the channel is considered to be usable, and the predetermined duration is The length of time a CCA observes the time window. Specifically, when the UE does not monitor the carrier signal within a CCA observation time window, the current CCA count value is decremented by one, and when the carrier signal is monitored within a CCA observation time window, the current CCA count is maintained. The value does not change. Further, after the base station decrements the CCA count value by one, it also determines whether the subtracted CCA count value is zero. If it is determined that the CCA count value is not zero, the CCA count is continued based on the CCA count value, if it is determined If the CCA count value is zero, the channel of the secondary carrier is occupied.
  • the UE may regenerate an integer random number as the initial CCA count value after the start of the next uplink time period, and according to the initial The CCA count value is subjected to CCA counting, and the channel of the secondary carrier is occupied after the initial CCA count value is reduced to zero.
  • the so-called CCA count may be sequentially decremented according to the following procedure until the initial CCA count value is reduced to zero: at the end of each predetermined duration, it is determined whether the carrier signal is monitored within the predetermined duration of the end. If yes, the CCA count value is decremented by one. Otherwise, the CCA count value is kept unchanged.
  • the UE performs CCA failure to enter the ECCA phase and the random number obtained in the ECCA phase is 5, and the CCA counts at the end of the current uplink time segment. If the value is reduced to 3, the UE regenerates a random number after the start of the next uplink time period. If it is 4, the UE restarts channel monitoring from the state where the CCA count value is 4.
  • the UE may also record the previous uplink time before continuing to perform ECCA on the channel of the secondary carrier in the next uplink time period.
  • the UE will record the CCA count value of the end time of the previous uplink time period as the initial The initial CCA count value, and the CCA count is performed according to the initial CCA count value, and the channel of the secondary carrier is occupied after the initial CCA count value is reduced to zero. In this way, the UE does not need to restart the CCA or the ECCA in each uplink time period, which improves the efficiency of the UE accessing the secondary carrier channel.
  • the UE suspends CCA or ECCA in a predetermined downlink time period, and starts CCA or ECCA in a predetermined uplink time period. It is assumed that the UE performs the CCA failure and enters the ECCA phase and the random number obtained in the ECCA phase is 5, which means that the initial value of the CCA count value is 5, and the UE needs to listen to 5 idle CCA observation time windows (for example: 20 us) to occupy channel. Each time the UE listens to an idle CCA observation time window, it subtracts 1 from the CCA count value until the CCA count value is reduced to 0, and the UE can occupy the channel.
  • idle CCA observation time windows for example: 20 us
  • the UE records the CCA count 3 before the start of the next uplink time period, and at the beginning of the next uplink time period, the UE continues to count from the CCA count to 3.
  • the status begins with channel monitoring.
  • the contention period of the UE is divided according to the uplink and downlink transmission segments, and the UE is allowed to compete for the unlicensed spectrum only in the uplink time period, so that the LBT mechanism can be more effectively applied to the uplink and downlink time period independent mobile communication system.
  • the implementation process of the base station side is as follows:
  • Step 1701 The base station occupies a channel of the secondary carrier; the secondary carrier operates in an unlicensed frequency band.
  • the secondary carrier is a cell managed by the base station, and the cell can only be configured to work as a secondary carrier.
  • Step 1702 The base station starts a collision detection gap at the Nth symbol after the channel of the secondary carrier is occupied.
  • the N may be an integer random number, or may be a preset integer value, or may be determined according to a cell identifier corresponding to the secondary carrier, where the cell identifier includes a public land mobile network. (English: Public Land Mobile Network, abbreviation: PLMN) identification and / or physical cell identification.
  • PLMN Public Land Mobile Network
  • the length of the collision detection gap is not more than the length of one symbol.
  • Step 1703 The base station monitors whether there is a carrier signal sent by another base station on the channel of the secondary carrier in the collision detection gap, and the strength of the carrier signal is greater than a preset threshold; if yes, the occupation is stopped. The channel of the secondary carrier; otherwise, the channel of the secondary carrier continues to be occupied.
  • the method further includes notifying the UE served by the secondary carrier to stop receiving the secondary carrier signal.
  • the base station monitors whether the channel has a carrier signal sent by another base station in the collision detection gap, and determines the subsequent carrier according to the monitoring result. Whether to continue to transmit signals, thereby reducing the probability of channel occupation conflicts between multiple base stations.
  • the implementation process of the UE side is as follows: :
  • Step 1901 The UE occupies a channel of the secondary carrier, and the secondary carrier works in an unlicensed frequency band.
  • the secondary carrier is a cell managed by the base station, and the cell can only be configured to work as a secondary carrier.
  • Step 1902 The UE starts a collision detection gap at the Nth symbol after the channel of the secondary carrier is occupied.
  • the length of the collision detection gap is not more than the length of one symbol.
  • Step 1903 The UE monitors whether there is a carrier signal sent by another UE on the channel of the secondary carrier in the collision detection gap, and the strength of the carrier signal is greater than a preset threshold; if yes, the occupation is stopped. The channel of the secondary carrier; otherwise, the channel of the secondary carrier continues to be occupied.
  • the UE determines whether a collision detection gap is used after the channel of the secondary carrier is occupied, and whether the channel is monitored by the UE in the collision detection gap, and whether the subsequent signal is determined according to the monitoring result. Continue to transmit signals, thereby reducing the probability of channel occupancy conflicts between multiple UEs.
  • embodiments of the present invention can be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or a combination of software and hardware. Moreover, the invention can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) including computer usable program code.
  • computer-usable storage media including but not limited to disk storage, CD-ROM, optical storage, etc.
  • the computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device.
  • the apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.
  • These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device.
  • the instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

La présente invention concerne une station de base, un équipement utilisateur (UE) et un procédé pour mettre en oeuvre un CSMA au moyen d'un système de communication mobile. Des périodes d'attente dues à un conflit d'accès sont classées en fonction de segments de transmission de liaison montante et de liaison descendante, et il est spécifié qu'un équipement utilisateur ne rivalise pour des spectres sans licence que dans une période de liaison descendante, de sorte qu'un système CSMA peut être utilisé plus efficacement dans un système de communication mobile dans lequel les périodes de liaison montante et de liaison descendante sont indépendantes. De plus, les modes et formes de réalisation de la présente invention concernent également une station de base, un UE et un procédé pour mettre en oeuvre un CSMA au moyen d'un système de communication mobile. Une fois qu'une station de base ou un UE occupe un canal, le procédé consiste à détecter si un signal de porteuse, envoyé par une autre station de base, est présent dans le canal dans un créneau temporel de détection de conflit, par la détermination du créneau temporel de détection de conflit, et si des signaux continuent à être envoyés ultérieurement, selon le résultat de surveillance, ce qui permet de réduire la probabilité des conflits d'occupation de canal entre de multiples stations de base et de multiples UE.
PCT/CN2015/071738 2015-01-28 2015-01-28 Station de base, équipement utilisateur et procédé pour mettre en oeuvre un accès multiple avec écoute de porteuse (csma) au moyen d'un système de communication mobile WO2016119142A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PCT/CN2015/071738 WO2016119142A1 (fr) 2015-01-28 2015-01-28 Station de base, équipement utilisateur et procédé pour mettre en oeuvre un accès multiple avec écoute de porteuse (csma) au moyen d'un système de communication mobile
CN201580002049.3A CN106031286B (zh) 2015-01-28 2015-01-28 基于移动通信系统实现lbt的基站、用户设备及方法

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2015/071738 WO2016119142A1 (fr) 2015-01-28 2015-01-28 Station de base, équipement utilisateur et procédé pour mettre en oeuvre un accès multiple avec écoute de porteuse (csma) au moyen d'un système de communication mobile

Publications (1)

Publication Number Publication Date
WO2016119142A1 true WO2016119142A1 (fr) 2016-08-04

Family

ID=56542142

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2015/071738 WO2016119142A1 (fr) 2015-01-28 2015-01-28 Station de base, équipement utilisateur et procédé pour mettre en oeuvre un accès multiple avec écoute de porteuse (csma) au moyen d'un système de communication mobile

Country Status (2)

Country Link
CN (1) CN106031286B (fr)
WO (1) WO2016119142A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109863807A (zh) * 2019-01-03 2019-06-07 北京小米移动软件有限公司 信道检测方法及装置

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10485029B2 (en) * 2017-03-07 2019-11-19 Futurewei Technologies, Inc. System and method for collision detection and mitigation with wake-up packets
KR102564966B1 (ko) * 2017-12-27 2023-08-09 가부시키가이샤 엔티티 도코모 유저단말 및 무선 통신 방법
CN110149720B (zh) * 2018-02-13 2022-02-22 展讯通信（上海）有限公司 一种上行lbt的方法以及装置、介质、终端

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103580840A (zh) * 2012-08-10 2014-02-12 捷讯研究有限公司 未授权频带中的td lte辅分量载波
CN103765824A (zh) * 2011-07-14 2014-04-30 美国博通公司 用于在系统的未许可频带上提供灵活时间共享方案的方法和装置
US20140341053A1 (en) * 2013-05-20 2014-11-20 Qualcomm Incoporated Wireless feedback communications over unlicensed spectrum
CN104301273A (zh) * 2014-08-25 2015-01-21 中兴通讯股份有限公司 使用非授权载波发送及接收信号的方法、基站及用户设备

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9883404B2 (en) * 2013-06-11 2018-01-30 Qualcomm Incorporated LTE/LTE—A uplink carrier aggregation using unlicensed spectrum

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103765824A (zh) * 2011-07-14 2014-04-30 美国博通公司 用于在系统的未许可频带上提供灵活时间共享方案的方法和装置
CN103580840A (zh) * 2012-08-10 2014-02-12 捷讯研究有限公司 未授权频带中的td lte辅分量载波
US20140341053A1 (en) * 2013-05-20 2014-11-20 Qualcomm Incoporated Wireless feedback communications over unlicensed spectrum
CN104301273A (zh) * 2014-08-25 2015-01-21 中兴通讯股份有限公司 使用非授权载波发送及接收信号的方法、基站及用户设备

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109863807A (zh) * 2019-01-03 2019-06-07 北京小米移动软件有限公司 信道检测方法及装置
CN109863807B (zh) * 2019-01-03 2023-12-12 北京小米移动软件有限公司 信道检测方法及装置
US11849486B2 (en) 2019-01-03 2023-12-19 Beijing Xiaomi Mobile Software Co., Ltd. Channel detection method and apparatus

Also Published As

Publication number Publication date
CN106031286A (zh) 2016-10-12
CN106031286B (zh) 2019-08-13

Similar Documents

Publication Publication Date Title
US9936394B2 (en) Method for processing data after unlicensed spectrum is released, and user equipment
US10028150B2 (en) Method and system for contending for channel of unlicensed frequency band, and apparatus
CN104796986B (zh) 一种d2d通信方法及设备
US10045378B2 (en) Channel monitoring method and device
WO2016187954A1 (fr) Procédé et dispositif d'attribution de temps d'occupation de canal dans une bande de fréquences non autorisées
JP7005759B2 (ja) データ伝送方法、端末装置、およびネットワーク装置
JP6462141B2 (ja) アンライセンス・バンド送信をスケジュールするための方法およびシステム
CN114731706A (zh) Nr-u中的基于帧的设备(fbe)
US10542438B2 (en) Method for detecting signal on unlicensed spectrum channel, user equipment, and base station
GB2550200A (en) Methods and devices for supporting access to unlicensed radio resources in wireless communication systems
US20190075592A1 (en) Control information processing method, base station, and terminal
CN107006015B (zh) 使用频谱资源进行通信的方法和通信设备
EP3331309B1 (fr) Procédé et dispositif de transmission de données
WO2017166212A1 (fr) Procédé d'émission de signal, dispositif terminal, dispositif de réseau d'accès et système d'émission de signal
US10039124B2 (en) Negotiated schedules for coexistence in unlicensed frequency bands
CN107926042B (zh) 一种用于无线通信系统的发送器和接收器
US11246159B2 (en) Transmission medium sharing in a wireless communications network
WO2016155563A1 (fr) Procédé et dispositif pour préempter des ressources de transmission sur des porteuses sans licence
WO2016119142A1 (fr) Station de base, équipement utilisateur et procédé pour mettre en oeuvre un accès multiple avec écoute de porteuse (csma) au moyen d'un système de communication mobile
CN112640556A (zh) 蜂窝网络中的冲突避免
WO2016119219A1 (fr) Procédé de communication, station de base, et équipement d'utilisateur
WO2017020384A1 (fr) Procédé et système de détection de canal lbt dépendant de la charge, station de base, et terminal
EP3445079B1 (fr) Procédé et dispositif de transmission de liaison montante à base de système d'accès assisté par licence (laa)
EP3673698B1 (fr) Procédés et noeuds de communication sur de multiples canaux
WO2017049631A1 (fr) Procédé et dispositif de traitement de signal de communication, et serveur de communication

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 15879353

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 15879353

Country of ref document: EP

Kind code of ref document: A1