WO2017076219A1 - 多载波的竞争接入方法、装置及系统 - Google Patents

多载波的竞争接入方法、装置及系统 Download PDF

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Publication number
WO2017076219A1
WO2017076219A1 PCT/CN2016/103600 CN2016103600W WO2017076219A1 WO 2017076219 A1 WO2017076219 A1 WO 2017076219A1 CN 2016103600 W CN2016103600 W CN 2016103600W WO 2017076219 A1 WO2017076219 A1 WO 2017076219A1
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Prior art keywords
lbt
carrier
carriers
channel
fast
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PCT/CN2016/103600
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English (en)
French (fr)
Inventor
杨玲
苟伟
彭佛才
毕峰
赵亚军
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中兴通讯股份有限公司
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Publication of WO2017076219A1 publication Critical patent/WO2017076219A1/zh

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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W72/00Local resource management
    • H04W72/04Wireless resource allocation
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W72/00Local resource management
    • H04W72/04Wireless resource allocation
    • H04W72/044Wireless resource allocation based on the type of the allocated resource
    • H04W72/0453Resources in frequency domain, e.g. a carrier in FDMA
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W72/00Local resource management
    • H04W72/50Allocation or scheduling criteria for wireless resources
    • H04W72/54Allocation or scheduling criteria for wireless resources based on quality criteria
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W72/00Local resource management
    • H04W72/50Allocation or scheduling criteria for wireless resources
    • H04W72/54Allocation or scheduling criteria for wireless resources based on quality criteria
    • H04W72/542Allocation or scheduling criteria for wireless resources based on quality criteria using measured or perceived quality
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W74/00Wireless channel access
    • H04W74/08Non-scheduled access, e.g. ALOHA
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W74/00Wireless channel access
    • H04W74/08Non-scheduled access, e.g. ALOHA
    • H04W74/0808Non-scheduled access, e.g. ALOHA using carrier sensing, e.g. carrier sense multiple access [CSMA]
    • H04W74/0816Non-scheduled access, e.g. ALOHA using carrier sensing, e.g. carrier sense multiple access [CSMA] with collision avoidance
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W74/00Wireless channel access
    • H04W74/08Non-scheduled access, e.g. ALOHA
    • H04W74/0833Random access procedures, e.g. with 4-step access
    • H04W74/0841Random access procedures, e.g. with 4-step access with collision treatment
    • H04W74/085Random access procedures, e.g. with 4-step access with collision treatment collision avoidance

Definitions

  • the present invention relates to the field of communications, and in particular to a multi-carrier contention access method, apparatus, and system.
  • the unlicensed spectrum has the characteristics that the unlicensed spectrum does not need to be purchased, the spectrum resource has zero cost, and has the characteristics of free/low cost; the individual and the enterprise can participate in the deployment, and the equipment of the equipment vendor can be deployed arbitrarily, and the access requirement is low. Low cost; 5GHz, 2.4GHz and other frequency bands in the unlicensed spectrum can be used, with features of large available bandwidth; unlicensed carriers have the characteristics of shared resources, that is, when multiple different systems are operating or the same system When different operators operate in it, they can consider some ways of sharing resources to improve spectrum utilization efficiency, and so on.
  • LTE LAA Long Term Evolution
  • WIreless wireless fidelity
  • Wi-Fi Wireless Fidelity
  • LBT Listening Before Talk
  • UE User Equipment
  • LTE-U LTE Advanced in Unlicensed Spectrums
  • WI phase 3GPP RAN1 #82
  • the UE has reached a consensus on whether to implement the LBT mechanism before the uplink starts transmitting. That is, most companies believe that the UE needs to implement the LBT mechanism before starting to transmit data, in order to avoid or reduce the hidden node problem, thereby improving the performance of the uplink system.
  • uplink can use LBT Cat2 mechanism, or LBT Cat4 mechanism, and the maximum contention window value should be from the set ⁇ 3, 4, 5, In 6,7 ⁇ , the delay period defer period is 16us plus a slot time; the cross-carrier scheduling situation is different, when the LBT Cat4 mechanism is adopted, the maximum competition window value should be better than the downlink LBT Cat4 competition window. The value is small, but larger than the contention window of the self-scheduling case. As of now unknown, there is still no consensus.
  • the embodiments of the present invention provide a method, an apparatus, and a system for competing access of multiple carriers, so as to at least solve the LBT contention access method in the related art due to the lack of uplink multi-carrier, resulting in poor running performance of uplink data transmission performance under high load.
  • the problem is to at least solve the LBT contention access method in the related art due to the lack of uplink multi-carrier, resulting in poor running performance of uplink data transmission performance under high load.
  • a multi-carrier contention access method including: acquiring, according to a first preset condition, a carrier set that performs an LBT mechanism after listening, and according to a preset scheduling manner, in a carrier The contention access of the channel is performed in the set according to the second preset condition.
  • the first preset condition includes: indicating by the base station; or, the base station indication is combined with the user equipment UE selection; or the user equipment UE is autonomously selected; or, predefined.
  • the preset scheduling manner includes: a self-carrier scheduling mode, or a cross-carrier scheduling mode.
  • the second preset condition includes: performing, on each carrier in the set of carriers, the contention access of the channel according to the same LBT mechanism; or, respectively, on each carrier in the carrier set according to different After listening, the LBT mechanism performs the competitive access of the channel.
  • performing the contention access of the channel according to the same listening and speaking LBT mechanism on each carrier in the carrier set includes: the user equipment UE is on each carrier.
  • the channel is competitively accessed.
  • the specified LBT mechanism includes one of the following: LBT Cat2 mechanism; enhanced LBT Cat2 mechanism; configured for long time to execute LBT process
  • the LBTCat4 mechanism with a small random back value of N is fast; the LBT mechanism is said to be fast after listening; among them, the LBT mechanism after fast listening first includes one of the following: delay + extended clean channel evaluation defer period + ECCA process, or Directly expand the clean channel assessment ECCA process.
  • the user equipment selects whether to perform an uplink LBT mechanism or perform an LBT Cat2 mechanism.
  • the usage rights for acquiring the channel include: Competing access of the channel is performed on the carrier according to the LBT Cat2 mechanism. For the carrier that successfully completes the LBT Cat2 mechanism, it is determined that the right to successfully complete the LBT Cat2 mechanism carrier is obtained; or, LBT is performed on S carriers of the K carriers. If the total number of carriers that successfully implement the LBT Cat2 mechanism does not meet the specific number of carriers, the process is successful.
  • the preset mode includes: determining that the transmission device is not obtained.
  • the carrier is randomly selected to meet the specific number of carriers; or, directly, on the carrier that fails to perform the LBT Cat2 mechanism, the transmission device acquires the right to use the carrier;
  • the total number of carriers of the LBT Cat2 mechanism satisfies a certain number of carriers, and the transmission device uses or considers that the right to use the LBT Cat2 mechanism carrier is successfully completed.
  • the successful execution of the LBT Cat2 mechanism includes: if the channel is detected from busy to idle, and the time when the detection channel is continuously idle is greater than and/or equal to the preset idle channel evaluation CCA detection duration, or the time when the detection channel is continuously idle is greater than and / or equal to the preset idle channel evaluation CCA detection duration, it is determined that the transmission device acquires the use right of the unlicensed carrier, or completes the LBT Cat2 process.
  • the specified first listening mechanism is an enhanced LBT Cat2 mechanism
  • the detection start position of the CCA detection duration of the idle channel evaluation includes the fixed CCA detection start position or the CCA detection start position is randomly selected
  • the competing access of the channel according to the specified LBT mechanism is performed on each carrier, including: competing access of the channel according to a common fixed CCA detection starting position on each carrier; or, in each carrier Competing access to the channel according to an independent fixed CCA detection start position; or, on each carrier, competing access of the channel according to a common randomly selected CCA detection start position; or, on each carrier
  • the contention access of the channel is performed according to an independent randomly selected CCA detection starting position.
  • the contention access time area is divided into K CCA detection time segments in advance; and the fixed transmission time of each transmission device is performed on the K CCA detection time periods. A fixed starting point for K different time periods begins CCA detection.
  • different transmission devices have different fixed CCA detection starting points in K different time periods; or different transmission devices have the same fixed CCA detection starting point in K different time periods.
  • the contention access time area is divided into K CCA detection time segments in advance; and the transmission devices randomly select respective CCAs during the K CCA detection time periods.
  • the starting point of the detection period is used as the starting point of the CCA detection; or, the transmission device randomly selects the respective CCA detection starting point on the contention access time area; or, the transmission device randomly selects the respective CCA detection period on the K CCA detection periods
  • the CCA detection starting point is randomly selected within the CCA detection time period; or, the transmission device fixes one CCA detection time period on the K CCA detection time periods, and randomly selects the CCA detection starting point in the CCA detection time period.
  • the transmission device detects that the channel is busy to idle, and the continuous detection channel idle time is greater than and/or equal to the CCA detection duration, or the detection channel is continuously idle longer than and/or equal to the preset idle channel assessment CCA detection duration, Then, it is determined that the transmission device acquires the right to use the unlicensed carrier, or completes the enhanced LBT Cat2 process.
  • the competition for accessing the channel according to the specified LBT mechanism on each carrier is included: On the carrier, according to the fast first listening and then the LBT mechanism to complete the contention access of the channel, it is determined that the carrier usage right of the LBT process is successfully completed; or, according to the fast first listening, the LBT mechanism is performed on each carrier. Performing the contention access of the channel, successfully completing the carrier of the LBT mechanism after the fast listening first, and the transmission device determines that the carrier of the LBT process is successfully used after the successful completion of the first listening.
  • the transmission device determines that the carrier is unavailable, or if the carrier that does not complete the fast first listen and then the LBT mechanism, if the random backoff value N satisfies the specific If the threshold value is reached, the transmission device determines that the carrier usage right of the LBT process is successfully completed after completing the fast first listening; if the random backoff value N does not satisfy the specific threshold, it is determined that the carrier usage right is not obtained. Or abandon the carrier; or, on each carrier, perform the contention access of the channel according to the fast first listening and then the LBT mechanism. If the last or last consecutive times, the CCA detects that the channel is idle, the transmission device determines that the acquisition succeeds quickly.
  • the other carriers After listening to the carrier right of the LBT process, or if there is a carrier that is about to complete the fast listening first and then the LBT mechanism, the other carriers stop the current LBT process, and immediately perform the channel competition according to the LBT Cat2 mechanism. If the carrier of the corresponding LBT process is completed before the start of the transmission time, the transmission device determines that the carrier usage right is acquired.
  • the LBT mechanism is performed according to different listening and speaking LBT mechanisms on each carrier in the carrier set.
  • the contention access of the channel includes: performing an LBT Cat2 mechanism on the selected one or more carriers, not performing an LBT mechanism on other carriers in the carrier set; performing fast LBT on the selected one or more carriers Mechanism, the LBT mechanism is not performed on other carriers in the carrier set; a fast LBT mechanism is performed on the selected one or more carriers, and the fast LBT process is to be completed on one or more carriers, in the carrier set
  • the LBT Cat2 mechanism is implemented on other carriers.
  • performing the LBT Cat2 mechanism on the other carriers in the carrier set includes: performing a random backoff value in the fast LBT process on one carrier When N is decremented to a certain threshold, other carriers in the carrier set start to perform the LBT Cat2 mechanism; or, when the random backoff value N in each of the multiple carriers performing fast LBT is decremented to a certain threshold The other carriers in the carrier set begin to perform the LBT Cat2 mechanism; wherein the self-delay operation can be performed on the carrier whose N value is first decremented to a certain threshold; or when the fast LBT process is performed on multiple carriers while detecting the channel idle When the random backoff value N on each carrier is decremented and the N value is decremented to a certain threshold, the other carriers in the carrier set begin to perform the LBT Cat2 mechanism.
  • the preset scheduling mode is the self-carrier scheduling mode
  • the LBT Cat4 mechanism is selected on the primary carrier selected by the base station, and the channel is competingly accessed according to the LBT Cat2 mechanism on the secondary carrier, in the carrier set.
  • Performing the contention access of the channel according to the second preset condition includes: performing an LBT Cat2 mechanism on the primary carrier indicated by the base station, performing a simplified LBT Cat4 or a fast LBT mechanism on the secondary carrier indicated by the base station side; or, in the carrier set
  • the LBT Cat2 mechanism is implemented on each of the carriers; or the configured LBT Cat4 or fast LBT mechanism with a relatively long time but a random backoff value N for performing the LBT process is performed on each carrier in the carrier set.
  • the LBT mechanism is not executed, and on the carrier where the base station executes LBT Cat2, the configured LBT Cat4 with a long time but a random backoff value N for performing the LBT process is executed or executed. If the gap between the downlink transmission burst and the uplink transmission burst is less than the preset value, the LBT mechanism is not executed on the carrier that performs the LBT successfully on the base station. Executive LBT Cat2 mechanism.
  • performing the contention access of the channel according to the second preset condition in the carrier set includes: performing a specified LBT Cat4 mechanism on each carrier in the carrier set;
  • the specified LBT Cat4 mechanism means that the maximum competition window size is larger than the competition window of the self-carrier scheduling execution LBT Cat4, and is lower than the downlink
  • the LBT Cat4 mechanism has a small contention window with a random backoff LBT process; or, a fast LBT mechanism is performed on each carrier in the carrier set; wherein: the fast LBT mechanism includes: defer period+ECCA or direct ECCA process
  • the LBT Cat2 mechanism is performed on the remaining carriers when the specified LBT Cat4 mechanism is to be successful on one or more selected carriers in the set of carriers; or one or more carriers selected in the set of carriers
  • a specific LBT Cat4 mechanism is implemented on the remaining carriers to perform a fast LBT mechanism; or a fast LBT mechanism is performed on one or more selected carriers in the set of carriers, and the LBT
  • determining to acquire the channel usage rights includes: completing the specified LBT Cat4 mechanism on each carrier in the carrier set Or in the case of a fast LBT mechanism, it is determined that the right to successfully complete the carrier of the specified LBT Cat4 mechanism or the fast LBT mechanism is obtained; or, in the carrier set, the designated LBT Cat4 mechanism or the fast LBT mechanism is about to be completed.
  • Carrier if the current random backoff value N satisfies the preset threshold, then stop other LBT processes on the carrier that is executing the specified LBT Cat4 mechanism or fast LBT mechanism, and immediately execute the LBT Cat2 mechanism; In the case that the carrier corresponding to the LBT process is completed on the carrier, the transmission device determines that the right to use the carrier that successfully completes the LBT process is obtained; or, the specified LBT Cat4 mechanism or the fast LBT mechanism is completed on a part of the carrier in the carrier set, and If the current random backoff value N on the carrier of the specified LBT Cat4 process or the fast LBT mechanism does not complete the preset threshold value Determining the right to use the carrier that successfully completes the LBT process; or, if the last or last consecutive CCA detection channel on the carrier that did not complete the specified LBT Cat4 process or the fast LBT mechanism is idle before the start of the transmission time, then The transmission device determines the right to use the acquired carrier.
  • determining to acquire the channel usage rights includes: in the carrier set Performing the specified LBT on the selected carrier.
  • the LBT Cat2 mechanism is implemented on the remaining carriers.
  • the respective LBT processes are completed on each carrier, it is determined that the carrier that successfully completes the LBT process is obtained. The right to use; or, when the specified LBT is performed on multiple carriers selected in the set of carriers, the Cat2 mechanism is about to succeed at the same time, the LBT Cat2 mechanism is executed on the remaining carriers, and the respective LBT processes are completed on each carrier.
  • determining to acquire the channel usage rights includes: selecting in the carrier set Performing the specified LBT Cat4 mechanism on one carrier, and performing the fast LBT mechanism on the remaining carriers, if the corresponding LBT process is completed before the transmission starts on each carrier, it is determined that the carrier that successfully completes the LBT process is obtained.
  • the LBT process determines that the current random backoff value N on the carrier that has not completed the LBT process satisfies the preset threshold value, and determines the right to use the carrier that successfully completes the LBT process; or, selects in the carrier set Execute the specified LBT Cat4 on one carrier Mechanism, in the case of performing a fast LBT mechanism on the remaining carriers, if the corresponding LBT process is not completed on some carriers before the transmission starts, if the last or last consecutive on the carrier of the LBT process is not completed If the CCA detects that the channel is idle, it determines that the right to use the carrier that successfully completes the LBT process is obtained; or performs the specified LBT Cat4 mechanism on the selected multiple carriers in the carrier set, and performs fast on the remaining carriers.
  • the LBT mechanism In the case of the LBT mechanism, if the random backoff value N of the corresponding LBT process on one carrier satisfies a certain threshold value, the respective LBT processes are stopped on the remaining carriers, and the LBT Cat2 mechanism is immediately executed; if each carrier is transmitting If the corresponding LBT process is completed before starting, it is determined that the right to use the carrier that successfully completes the LBT process is obtained; or, the specified LBT Cat4 mechanism is executed on the selected multiple carriers in the carrier set, and the remaining carriers are executed quickly.
  • the reservation signal may be sent, or The self-delay operation is performed; the carrier that has not completed the corresponding LBT process continues to perform CCA detection. If the carrier of the LBT process is still not completed at the beginning of the transmission, it is determined that the current random backoff value N on the carrier satisfies a specific threshold or the last time or If the CCA detection channel is idle for several consecutive times, it is determined that the right to use the carrier that successfully completes the LBT process is obtained; or the specified LBT Cat4 mechanism is executed on the selected multiple carriers in the carrier set, and the remaining carriers are executed.
  • the transmitting device determines that the LBT process is successfully completed.
  • the right to use the carrier or, perform the specified LBT Cat4 mechanism on multiple carriers selected in the carrier set, and perform fast LBT mechanism on the remaining carriers, if each carrier performs channel according to its own LBT mechanism Competitive access, if the LBT process is not completed on the carrier before the start of the transmission time, if the current carrier is currently If the backhaul value N satisfies the preset threshold value, or the last or last consecutive CCA detection channels are idle, the transmission device determines to obtain the right to use the carrier that successfully completes the LBT process; or, in the carrier Performing the specified LBT Cat4 mechanism on multiple carriers selected in the set, and performing a fast LBT mechanism on the remaining carriers, if the random backoff value N on the carrier satisfies the first threshold, then the other The random backoff value N on the carrier is adjusted to the first threshold; if the random backoff value N on the carrier after adjusting the random backoff value N satisfies the second threshold, the random backoff value on the other carriers N is adjusted to the second threshold, and
  • the method further includes: performing a processing flow according to a preset manner according to a carrier that fails to compete for the access channel by the LBT mechanism, or a data packet to be transmitted on the carrier; wherein the preset manner includes One: abandoning the carrier that failed the LBT, or abandoning the transmission on the carrier; retransmitting the data packet on the carrier performing the LBT failure; transmitting the data packet on the candidate resource on the carrier that successfully competes; using the backup Unlicensed carrier; multiplexing the same resources on other carriers to transmit their respective data packets; wherein different data is sent on the same resource; if the rank indication RI is greater than 2, the resource may be multiplexed for transmission, or may be randomly
  • the access radio network temporary identity RNTI or cyclic shift CS code transmits different data blocks on the same resource.
  • an apparatus for competing access of a multi-carrier including: an acquiring module, configured to acquire, according to a first preset condition, a carrier set that performs an LBT mechanism after listening; Module, set to root According to a preset scheduling manner, the contention access of the channel is performed in the carrier set according to the second preset condition.
  • the first preset condition includes: indicating by the base station; or, the base station indication is combined with the user equipment UE selection; or the user equipment UE is autonomously selected; or, predefined.
  • the preset scheduling manner includes: a self-carrier scheduling mode, or a cross-carrier scheduling mode.
  • the second preset condition includes: performing, on each carrier in the set of carriers, the contention access of the channel according to the same LBT mechanism; or, respectively, on each carrier in the carrier set according to different After listening, the LBT mechanism performs the competitive access of the channel.
  • the access module includes: a first access unit, configured to: when the scheduling mode is the self-carrier scheduling mode, the user equipment UE performs channel competition according to the specified LBT mechanism on each carrier.
  • Access includes one of the following: LBT Cat2 mechanism; enhanced LBT Cat2 mechanism; configured LBT Cat4 mechanism for long time but random backoff value N for performing LBT process; fast The first to listen to the LBT mechanism; among them, the fast first listener said that the LBT mechanism includes one of the following: delay + extended clean channel evaluation defer period + ECCA process, or directly expand the clean channel assessment ECCA process.
  • the executing unit is configured to select whether to perform an uplink LBT mechanism or perform an LBT Cat2 mechanism when a gap Gap duration between the downlink transmission burst and the uplink transmission burst is less than or equal to a preset threshold.
  • the apparatus includes: a first determining module configured to perform channel contention access when the LBT Cat2 mechanism is used on each carrier in the carrier set in a case where the specified listening mechanism is an LBT Cat2 mechanism Performing the contention access of the channel according to the LBT Cat2 mechanism on each carrier, and determining that the carrier of the LBT Cat2 mechanism carrier is successfully completed for the carrier that successfully completes the LBT Cat2 mechanism; or, the second determination module is set to be at K If the LBT Cat2 mechanism is successfully executed on the S carriers, if the LBT Cat2 mechanism fails to be executed on the remaining carriers, if the total number of carriers that successfully implement the LBT Cat2 mechanism does not satisfy the specific number of carriers, it is processed according to a preset manner;
  • the preset manner includes: determining that the transmission device does not acquire the use right of the carrier; or randomly selecting the carrier to satisfy the specific carrier quantity in the carrier that fails to perform the LBT Cat2 mechanism; or directly evaluating the carrier that fails to perform the LBT Cat2 mechanism
  • the transmission device acquires the right to
  • the successful execution of the LBT Cat2 mechanism includes: if the channel is detected from busy to idle, and the time when the detection channel is continuously idle is greater than and/or equal to the preset idle channel evaluation CCA detection duration, or the time when the detection channel is continuously idle is greater than and / or equal to the preset idle channel evaluation CCA detection duration, it is determined that the transmission device acquires the use right of the unlicensed carrier, or completes the LBT Cat2 process.
  • the first access unit includes: a first detecting subunit, configured to say that the mechanism is an enhanced LBT Cat2 mechanism after the specified first listening, and the detection starting position of the idle channel evaluation CCA detecting duration includes the fixed CCA detection.
  • the contention access of the channel is performed according to the common fixed CCA detection start position on each carrier; or, the second detection subunit is set to be in each carrier Follow the independent fixed CCA Detecting a starting position to perform contention access of the channel; or, a third detecting subunit, configured to perform contention access of the channel according to a common randomly selected CCA detection starting position on each carrier; or, a fourth detector
  • the unit is configured to perform contention access of the channel on each carrier according to an independently randomly selected CCA detection starting position.
  • the contention access time area is divided into K CCA detection time segments in advance; and the fixed transmission time of each transmission device is performed on the K CCA detection time periods. A fixed starting point for K different time periods begins CCA detection.
  • different transmission devices have different fixed CCA detection starting points in K different time periods; or different transmission devices have the same fixed CCA detection starting point in K different time periods.
  • the contention access time area is divided into K CCA detection time segments in advance; and the transmission devices randomly select respective CCAs during the K CCA detection time periods.
  • the starting point of the detection period is used as the starting point of the CCA detection; or, the transmission device randomly selects the respective CCA detection starting point on the contention access time area; or, the transmission device randomly selects the respective CCA detection period on the K CCA detection periods
  • the CCA detection starting point is randomly selected within the CCA detection time period; or, the transmission device fixes one CCA detection time period on the K CCA detection time periods, and randomly selects the CCA detection starting point in the CCA detection time period.
  • the transmission device detects that the channel is busy to idle, and the continuous detection channel idle time is greater than and/or equal to the CCA detection duration, or the detection channel is continuously idle longer than and/or equal to the preset idle channel assessment CCA detection duration, Then, it is determined that the transmission device acquires the right to use the unlicensed carrier, or completes the enhanced LBT Cat2 process.
  • the first access unit includes: a first determining sub-unit, configured to perform a fast listening on each carrier in a case where the LBT mechanism is said to be fast after listening to the LBT mechanism after the specified listening After the LBT mechanism completes the contention access of the channel, it is determined that the carrier usage right of the LBT process is successfully completed; or the second determining subunit is set to perform the LBT mechanism according to the fast first listening on each carrier.
  • the transmission device determines that the carrier usage right of the LBT process is successfully completed after completing the fast first listening; or, after completing the fast first listening.
  • the transmission device considers that the carrier is unavailable, or, for a carrier that does not complete the fast listening and LBT mechanism, if the random backoff value N satisfies a specific threshold, the transmission device determines that the carrier is successful.
  • the carrier usage right of the LBT process is said; if the random backoff value N does not satisfy the specific threshold, it is determined that the carrier usage right is not acquired, or the carrier is abandoned; or a third determining subunit, configured to perform a contention access of the channel according to a fast first listening and then an LBT mechanism on each carrier, and if the last or last consecutive CCA detects that the channel is idle, the transmitting device determines to obtain Successfully complete the fast first listening and then say the carrier usage right of the LBT process; or, the fourth determining subunit is set to stop the current LBT process if there is a carrier that is about to complete the fast first listening and then the LBT mechanism.
  • the competing access of the channel is performed according to the LBT Cat2 mechanism, and the carrier of the corresponding LBT process is completed before the start of the transmission time, and the transmitting device determines that the carrier usage right is acquired.
  • the access module includes: a first execution unit, configured to perform, in the self-carrier scheduling mode, in a case where the base station performs a contention access of the channel according to the LBT Cat4 mechanism on each carrier, in the selected one or The LBT Cat2 mechanism is implemented on multiple carriers, and the LBT mechanism is not executed on other carriers in the carrier set; the second execution unit is set to be selected Performing a fast LBT mechanism on one or more carriers, and not performing an LBT mechanism on other carriers in the carrier set; the third execution unit is configured to perform a fast LBT mechanism on the selected one or more carriers, The LBT Cat2 mechanism is performed on other carriers in the set of carriers when the fast LBT procedure is to be completed on one or more carriers.
  • a first execution unit configured to perform, in the self-carrier scheduling mode, in a case where the base station performs a contention access of the channel according to the LBT Cat4 mechanism on each carrier, in the selected one or The LBT Cat2 mechanism is implemented on multiple carriers, and the LBT mechanism is not executed on other
  • the third execution unit includes: a first execution subunit, configured to start performing other carriers in the carrier set when the random backoff value N in the fast LBT process performed on one carrier is decremented to a specific threshold The LBT Cat2 mechanism; or, the second execution subunit, is configured to start performing LBT on other carriers in the carrier set when the random backoff value N in each of the multiple carriers performing the fast LBT process is decremented to a specific threshold a Cat2 mechanism; wherein a self-delay operation is performed on a carrier whose N value is first decremented to a specific threshold; or a third execution subunit is set to perform a fast LBT process on multiple carriers while detecting a channel idle time, The random backoff value N on each carrier is decremented, and when the N value is decremented to a certain threshold, the other carriers in the carrier set begin to perform the LBT Cat2 mechanism.
  • a first execution subunit configured to start performing other carriers in the carrier set when the random backoff value N in the fast LBT process performed on one carrier is de
  • the access module includes: a fourth execution unit, configured to perform the channel according to the LBT Cat4 mechanism on the primary carrier selected by the base station according to the LBT Cat2 mechanism, in a preset scheduling mode, the self-carrier scheduling mode
  • the LBT Cat2 mechanism is performed on the primary carrier indicated by the base station, and the simplified LBT Cat4 or fast LBT mechanism is performed on the secondary carrier indicated by the base station side; or, the fifth execution unit is set to be in the carrier
  • the LBT Cat2 mechanism is performed on each carrier in the set; or the sixth execution unit is set to perform a long time for performing the LBT process on each carrier in the carrier set but the random backoff value N is relatively small LBT Cat4 or fast LBT mechanism; or, the seventh execution unit, is set to perform the LBT mechanism on the base station, does not perform the LBT mechanism, and executes the configured LBT process on the carrier performing the LBT Cat2 on the base station.
  • LBT Cat4 with a long time but a random backoff value N is relatively small or performs a fast LBT process; or, the eighth execution unit is set to be on the carrier where the base station performs LBT successfully, if The gap between the transmission and the uplink transmission burst burst Gap less than a preset value, LBT mechanism is not performed, or performed LBT Cat2 mechanism.
  • the access module includes: a ninth execution unit, configured to perform a specified LBT Cat4 mechanism on each carrier in the carrier set in a preset scheduling mode of the cross-carrier scheduling mode; wherein the designated LBT Cat4
  • the mechanism is that the maximum contention window size is larger than the competition window of the LBT Cat4 from the carrier scheduling execution, and the LBT process with random backoff is smaller than the competition window of the downlink LBT Cat4 mechanism; or the tenth execution unit is set to be in the carrier Performing a fast LBT mechanism on each carrier in the set; wherein: the fast LBT mechanism includes: defer period+ECCA or direct ECCA process; or, the eleventh execution unit, is set to one or more selected in the carrier set
  • the LBT Cat2 mechanism is performed on the remaining carriers when the specified LBT Cat4 mechanism is to be executed on the carrier; or the twelfth execution unit is set to perform a specific LBT on the selected one or more carriers in the carrier set
  • the Cat4 mechanism performs a fast LBT mechanism on the remaining
  • the apparatus further includes: a fifth determining subunit configured to determine that the specified LBT Cat4 mechanism is successfully completed if the specified LBT Cat4 mechanism or the fast LBT mechanism is completed on each carrier in the carrier set Or the right of the carrier of the fast LBT mechanism; or, the sixth determining subunit, is set to be in the carrier set, that is, the carrier of the specified LBT Cat4 mechanism or the fast LBT mechanism is to be completed, if the current random backoff value N is satisfied Preset threshold
  • the LBT process on the carrier that is executing the specified LBT Cat4 mechanism or the fast LBT mechanism is stopped, and the LBT Cat2 mechanism is immediately executed; in the case where the carrier corresponding to the LBT process is completed on each carrier, the transmission device determines to acquire The right to use the carrier to successfully complete the LBT process; or, the seventh decision subunit, set to complete the specified LBT Cat4 mechanism or fast LBT mechanism on a part of the carrier set, and not complete the specified LBT Cat4 process or fast If the current random backoff value
  • the eleventh execution unit includes: a ninth decision subunit configured to perform a specified LBT on a selected carrier in the set of carriers.
  • the LBT Cat2 mechanism is executed on the remaining carriers, when each When the respective LBT processes are completed on each of the carriers, it is determined that the right to use the carrier that successfully completes the LBT process is obtained; or the tenth determining subunit is set to perform the specified on the plurality of carriers selected in the carrier set.
  • the LBT Cat2 mechanism is implemented on the remaining carriers, and when the respective LBT processes are completed on each carrier, it is determined that the right to use the carrier that successfully completes the LBT process is obtained; or, the eleventh a decision subunit, configured to perform a specified LBT Cat4 mechanism on a plurality of selected carriers in the set of carriers, if at least one carrier is about to complete the specified LBT Cat4 mechanism, performing an LBT Cat2 mechanism on the remaining carriers, when each When the respective LBT processes are completed on each of the carriers, it is determined that the right to use the carrier that successfully completes the LBT process is obtained.
  • the twelfth execution unit includes: a twelfth decision subunit configured to perform a specified LBT Cat4 mechanism on a selected one of the carrier sets, and perform a fast LBT mechanism on the remaining carriers, If the corresponding LBT process is completed before the start of the transmission on each carrier, it is determined that the right to use the carrier that successfully completes the LBT process is obtained; or the thirteenth determining subunit is set to be executed on the selected carrier in the carrier set.
  • the specified LBT Cat4 mechanism performs a fast LBT mechanism on the remaining carriers, if the corresponding LBT process is not completed on some carriers before the transmission starts, if the LBT process is not completed on the carrier If the random backoff value N satisfies the preset threshold value, it is determined that the right to use the carrier that successfully completes the LBT process is obtained; or the fourteenth determining subunit is set to perform the designation on the selected carrier in the carrier set.
  • the determining subunit is configured to perform a specified LBT Cat4 mechanism on the selected plurality of carriers in the carrier set, and if a fast LBT mechanism is performed on the remaining carriers, if there is a random back of the corresponding LBT process on one carrier If the value N meets a certain threshold, the respective LBT processes are stopped on the remaining carriers, and the LBT Cat2 mechanism is immediately executed; if each carrier completes the corresponding LBT process before the transmission starts, it is determined that the carrier that successfully completes the LBT process is obtained.
  • the sixteenth determining subunit configured to perform the specified LBT Cat4 mechanism on the selected plurality of carriers in the set of carriers, and if the fast LBT mechanism is performed on the remaining carriers, if the transmission starts Before the carrier completes the corresponding LBT process, the reserved signal may be sent, or the self-delay operation may be performed; the corresponding LBT process is not completed.
  • the wave continues to perform CCA detection.
  • the carrier of the LBT process is still not completed at the beginning of the transmission, it is determined that the current random backoff value N on the carrier satisfies a certain threshold or last or last consecutive if If the dry CCA detection channel is idle, it is determined that the right to use the carrier that successfully completes the LBT process is obtained; or, the seventeenth determining subunit is configured to perform the specified LBT Cat4 mechanism on the selected plurality of carriers in the carrier set.
  • the transmitting device determines Obtaining the right to use the carrier that successfully completes the LBT process; or, the eighteenth determining subunit, is configured to perform the specified LBT Cat4 mechanism on the selected plurality of carriers in the carrier set, and perform fast LBT on the remaining carriers If the LBT process is not completed on the carrier before the start of the transmission time, if the current random backoff value N on each carrier satisfies the preset gate, if the carrier is competing for the channel according to the LBT mechanism.
  • the carrier of the limit, or the last or last consecutive CSA detection channels are idle, then the transmission device determines that the acquisition is successfully completed.
  • the right to use the carrier of the LBT process; or, the nineteenth determining subunit, configured to perform the specified LBT Cat4 mechanism on the selected plurality of carriers in the set of carriers, in the case of performing a fast LBT mechanism on the remaining carriers If the random backoff value N on the carrier satisfies the first threshold, the random backoff value N on the other carriers is adjusted to the first threshold; if the random backoff value N is adjusted, the random carrier is adjusted.
  • the random backoff value N on the other carriers is adjusted to the second threshold value, and so on, if the random backoff value N is decremented to 0 before the start of the transmission start time Or complete the carrier corresponding to the LBT process, or if the LBT process is not completed on the carrier before the start of the transmission time, if the carrier currently has a random backoff value N that satisfies the preset threshold, or the last or last consecutive
  • the transmission device determines that the right to use the carrier that successfully completes the LBT process is obtained.
  • the device further includes: a first execution module, configured to execute the processing flow according to a preset manner, if the LBT mechanism competes for the carrier that fails to access the channel, or the data packet to be transmitted on the carrier, according to the first listening
  • the preset mode includes one of: abandoning the carrier that fails to perform the LBT, or abandoning the transmission on the carrier; retransmitting the data packet on the carrier that performs the LBT failure; and the candidate resource on the carrier that successfully competes; Transmitting a data packet; using an alternate unlicensed carrier; multiplexing the same resource on the other carrier to transmit the respective data packet; wherein different data is sent on the same resource, and if the rank indicating RI is greater than 2, the resource may be multiplexed
  • the transmission is performed, or different data blocks are transmitted on the same resource by random access wireless network temporary identification RNTI or cyclic shift CS coding.
  • a multi-carrier contention access system including: a base station and a terminal, wherein the base station is in communication connection with the terminal, wherein the terminal is the multi-carrier contention access device.
  • the carrier set for performing the LBT mechanism after the listener is obtained according to the first preset condition; and the contention access of the channel is performed according to the second preset condition in the carrier set according to the preset scheduling manner.
  • the invention solves the problem that the uplink data transmission performance is in a high-load running state due to the lack of the uplink multi-carrier LBT contention access method, thereby achieving the effect of improving the uplink data transmission performance in a high-load operation state.
  • FIG. 1 is a flowchart of a multi-carrier contention access method according to an embodiment of the present invention
  • FIG. 2 is a structural block diagram of a multi-carrier contention access apparatus according to an embodiment of the present invention.
  • FIG. 3 is a structural block diagram of a multi-carrier contention access system according to an embodiment of the present invention.
  • FIG. 1 is a flowchart of a multi-carrier contention access method according to an embodiment of the present invention. As shown in FIG. 1, the process includes the following steps:
  • Step S102 Acquire, according to the first preset condition, a carrier set that performs an LBT mechanism after listening first;
  • Step S104 Perform contention access of the channel according to the second preset condition in the carrier set according to a preset scheduling manner.
  • the multi-carrier contention access method obtained by the embodiment of the present application obtains a carrier set that performs the LBT mechanism after the first listening according to the first preset condition; according to the preset scheduling mode, according to the second preset condition in the carrier set Perform competitive access to the channel.
  • the invention solves the problem that the uplink data transmission performance is in a high-load running state due to the lack of the uplink multi-carrier LBT contention access method, thereby achieving the effect of improving the uplink data transmission performance in a high-load operation state.
  • the first preset condition includes: indicating by the base station; or, the base station indication is combined with the user equipment (User Equipment, UE for short); or the user equipment UE is autonomously selected; or, predefined.
  • the base station indication is combined with the user equipment (User Equipment, UE for short); or the user equipment UE is autonomously selected; or, predefined.
  • the preset scheduling manner includes: a self-carrier scheduling mode, or a cross-carrier scheduling mode.
  • the second preset condition includes: performing, by using the same Listening Before Talk (LBT) mechanism on each carrier in the carrier set, performing contention access of the channel; or, each in the carrier set The competing access of the channel is performed on the carrier according to different LBT mechanisms.
  • LBT Listening Before Talk
  • performing the contention access of the channel according to the same listening and speaking LBT mechanism on each carrier in the carrier set includes: the user equipment UE is on each carrier. According to the specified first listening and then said LBT mechanism for channel accession;
  • the specified LBT mechanism includes one of the following: LBT Cat2 mechanism; enhanced LBT Cat2 mechanism; The LBT Cat4 mechanism for the long time but the random backoff value N for performing the LBT process is fast; the LBT mechanism is said to be quick to listen first;
  • the LBT mechanism includes one of the following: a deferred period+ECA process, or a direct extended channel assessment ECCA process.
  • the user equipment selects whether to perform an uplink LBT mechanism or perform an LBT Cat2 mechanism.
  • the usage rights for acquiring the channel include:
  • the method is processed according to a preset manner;
  • the preset manner includes: determining that the transmission device does not acquire the use right of the carrier; or randomly selecting the carrier to satisfy the specific carrier quantity in the carrier that fails to perform the LBT Cat2 mechanism; or directly evaluating the failure of performing the LBT Cat2 mechanism.
  • the transmission device acquires the right to use the carrier; if the total number of carriers successfully performing the LBT Cat2 mechanism satisfies the specific number of carriers, the transmission device uses or considers that the right to use the LBT Cat2 mechanism carrier is successfully completed.
  • the successful execution of the LBT Cat2 mechanism includes: if the channel is detected from busy to idle, and the time when the detection channel is continuously idle is greater than and/or equal to the preset idle channel evaluation CCA detection duration, or the time when the detection channel is continuously idle is greater than and / or equal to the preset idle channel evaluation CCA detection duration, it is determined that the transmission device acquires the use right of the unlicensed carrier, or completes the LBT Cat2 process.
  • the specified first listening mechanism is an enhanced LBT Cat2 mechanism
  • the detection start position of the CCA detection duration of the idle channel evaluation includes the fixed CCA detection start position or the CCA detection start position is randomly selected
  • the competing access of the channel on each carrier according to the specified LBT mechanism is:
  • the contention access of the channel is performed on each carrier according to an independent randomly selected CCA detection start position.
  • the contention access time area is divided into K CCA detection time segments in advance; and the fixed transmission time of each transmission device is performed on the K CCA detection time periods. A fixed starting point for K different time periods begins CCA detection.
  • different transmission devices have different fixed CCA detection starting points in K different time periods; or different transmission devices have the same fixed CCA detection starting point in K different time periods.
  • the contention access time area is divided into K CCA detection time segments in advance; and the transmission devices randomly select respective CCAs during the K CCA detection time periods.
  • the starting point of the detection period is used as the starting point of the CCA detection; or, the transmission device randomly selects the respective CCA detection starting point on the contention access time area; or, the transmission device randomly selects the respective CCA detection period on the K CCA detection periods
  • the CCA detection starting point is randomly selected within the CCA detection time period; or, the transmission device fixes one CCA detection time period on the K CCA detection time periods, and randomly selects the CCA detection starting point in the CCA detection time period.
  • the transmission device detects that the channel is busy to idle, and the continuous detection channel idle time is greater than and/or equal to the CCA detection duration, or the detection channel is continuously idle longer than and/or equal to the preset idle channel assessment CCA detection duration, Then, it is determined that the transmission device acquires the right to use the unlicensed carrier, or completes the enhanced LBT Cat2 process.
  • the contention of the channel is performed on each carrier according to the specified LBT mechanism.
  • the LBT mechanism is determined to obtain the carrier usage right for successfully completing the LBT process.
  • the LBT mechanism On each carrier, according to the fast listening first, the LBT mechanism performs the channel's contention access, and successfully completes the carrier of the LBT mechanism after the fast listening first.
  • the transmission device determines that the LBT process is successful after completing the fast first listening.
  • the LBT mechanism performs the contention access of the channel. If the last or last consecutive CCA detects that the channel is idle, the transmission device determines that the acquisition is successful and the fast first listens and then the LBT is said. Carrier use rights for the process; or,
  • the transmission device determines that the carrier usage right is acquired.
  • the LBT mechanism is performed according to different listening and speaking LBT mechanisms on each carrier in the carrier set.
  • Competitive access to the channel includes:
  • a fast LBT mechanism is performed on the selected one or more carriers, and the LBT Cat2 mechanism is performed on other carriers in the carrier set when the fast LBT procedure is to be completed on one or more carriers.
  • performing the LBT Cat2 mechanism on the other carriers in the carrier set includes:
  • the other carriers in the carrier set begin to perform the LBT Cat2 mechanism; wherein the N value is first decremented to a specific threshold Self-delay operation on the carrier; or
  • the random backoff value N on each carrier is decremented, and when the N value is decremented to a specific threshold, the other carriers in the carrier set start to perform LBT. Cat2 mechanism.
  • the preset scheduling mode is the self-carrier scheduling mode
  • the LBT Cat4 mechanism is selected on the primary carrier selected by the base station, and the channel is competingly accessed according to the LBT Cat2 mechanism on the secondary carrier, in the carrier set.
  • Performing contention access of the channel according to the second preset condition includes:
  • the LBT mechanism is not executed, and on the carrier where the base station executes LBT Cat2, the LBT Cat4 configured to execute the LBT process but with a relatively small random backoff value N or the fast LBT process is executed. ;or,
  • the LBT mechanism On the carrier where the base station performs the LBT successfully, if the gap Gap between the downlink transmission burst and the uplink transmission burst is less than the preset value, the LBT mechanism is not executed, or the LBT Cat2 mechanism is executed.
  • performing the contention access of the channel according to the second preset condition in the carrier set includes:
  • the specified LBT Cat4 mechanism is performed on each carrier in the set of carriers; wherein the specified LBT Cat4 mechanism means that the maximum contention window size is larger than the competition window of the LBT Cat4 from the carrier scheduling and competes with the LBT Cat4 mechanism in the downlink Small window with random retreat LBT process; or,
  • the fast LBT mechanism includes: defer Period+ECCA or direct ECCA process; or,
  • the LBT Cat2 mechanism is performed on the remaining carriers; or,
  • the LBT Cat2 mechanism is implemented on the remaining carriers.
  • determining to acquire channel usage rights includes:
  • the carrier of the specified LBT Cat4 mechanism or the fast LBT mechanism is about to be completed. If the current random backoff value N satisfies the preset threshold, then other specified LBT Cat4 mechanisms are being executed or fast.
  • the LBT process on the carrier of the LBT mechanism immediately performs the LBT Cat2 mechanism; in the case that the carrier corresponding to the LBT process is completed on each carrier, the transmission device determines that the right to use the carrier that successfully completes the LBT process is obtained; or
  • the transmission device determines the right to use the acquired carrier.
  • determining to acquire the channel usage rights includes:
  • the LBT Cat2 mechanism is executed on the remaining carriers.
  • each carrier completes its corresponding LBT process, it is determined that the LBT is successfully completed. The right to use the carrier of the process; or,
  • the LBT Cat2 mechanism is executed on the remaining carriers.
  • the decision is obtained. Successful use of the carrier of the LBT process; or,
  • Performing the specified LBT Cat4 mechanism on multiple selected carriers in the set of carriers if at least one carrier is about to complete the specified LBT Cat4 mechanism, performing the LBT Cat2 mechanism on the remaining carriers, when each carrier completes its own In the corresponding LBT process, it is determined that the right to use the carrier that successfully completes the LBT process is obtained.
  • determining to obtain the channel usage rights includes:
  • the pre-transmission may be sent. Leave the signal, or perform the self-delay operation; the carrier that has not completed the corresponding LBT process continues to perform the CCA detection. If the carrier of the LBT process is still not completed at the beginning of the transmission, it is determined that the current random backoff value N on the carrier meets the specific threshold. Or if the last or last consecutive CCA detection channels are idle, it is determined that the right to use the carrier that successfully completes the LBT process is obtained; or
  • the random backoff value N on the carrier satisfies the first threshold value
  • the random backoff value N on the other carriers is adjusted to the first threshold; if the random backoff value N on the carrier after adjusting the random backoff value N satisfies the second threshold, the random back on the other carriers
  • the value N is adjusted to the second threshold, and so on, before the start of the transmission time, If the random backoff value N is decremented to 0 or the carrier corresponding to the LBT process is completed, or if the LBT process is not completed on the carrier before the start of the transmission time, if the current random backoff value N on the carrier satisfies the preset threshold value
  • the carrier, or the last or last consecutive CCA detection channels are idle, and the transmission device determines to acquire the right to use the carrier that successfully completes the LBT procedure.
  • the multi-carrier contention access method provided by the embodiment of the present application further includes:
  • the processing flow is executed according to a preset manner; wherein the preset manner includes one of:
  • the different data is sent on the same resource. If the Rank Indicator (RI) is greater than 2, the resource can be multiplexed for transmission, or the random access radio network temporary identifier (Random Access Radio Network Temporary Identifier) , referred to as RNTI) or Cycle Shift (CS) encoding, sending different data blocks on the same resource.
  • RNTI Random Access Radio Network Temporary Identifier
  • CS Cycle Shift
  • a multi-carrier contention access method includes the following steps:
  • Step S1 Acquire, according to the first preset condition, a carrier set that performs an LBT mechanism after listening first;
  • the multi-carrier contention access method provided by the embodiment of the present application can be applied to a Long Term Evolution (LTE/LTE-A) system, and can be applied to a carrier service of an unlicensed spectrum.
  • LTE/LTE-A Long Term Evolution
  • the first preset condition includes: the base station indicates; or the base station indication is combined with the user equipment (User Equipment, UE for short); or the user equipment UE selects independently; or, predefined. That is, in the process of acquiring the carrier set of the Listening Before Talk (LBT) mechanism, the base station side and the terminal side respectively include different manners.
  • LBT Listening Before Talk
  • the base station can determine the carrier in the specific carrier set by randomly selecting the carriers in the specific carrier set in the available carrier set, or in a predefined manner, or based on the UE measurement report.
  • the acquired carrier set may include: the base station indicates the carrier in the specific carrier set, or the UE randomly selects or pre-defines the carrier in the specific carrier set in the carrier set indicated by the base station, or the UE autonomously Select a carrier in a particular carrier set.
  • Step S2 Perform contention access of the channel according to the second preset condition in the carrier set according to a preset scheduling manner.
  • the method for performing the contention access of the channel is divided into two categories according to the second preset condition, and the category 1 is performed on the carrier in the carrier set according to the same LBT mechanism. Competing access of the channel; Category 2, performing competing access of the channel according to different LBT mechanisms on each carrier in the set of carriers.
  • the preset scheduling manner includes: a self-carrier scheduling mode, or a cross-carrier scheduling mode.
  • the self-carrier scheduling mode is that when the base station performs the downlink LBT mechanism to contend for the use of the unlicensed carrier, when the uplink grant information is sent on the unlicensed carrier, the user equipment UE performs the uplink grant information and performs the corresponding carrier set.
  • Uplink channel contention access
  • the cross-carrier scheduling mode is that when the base station does not perform the downlink LBT mechanism but sends the uplink grant information through the authorized carrier, the user equipment UE performs uplink channel contention access on the corresponding carrier set after receiving the uplink grant information.
  • the multi-carrier contention access method obtained by the embodiment of the present application obtains a carrier set that performs the LBT mechanism after the first listening according to the first preset condition; according to the preset scheduling mode, according to the second preset condition in the carrier set Perform competitive access to the channel.
  • the invention solves the problem that the uplink data transmission performance is in a high-load running state due to the lack of the uplink multi-carrier LBT contention access method, thereby achieving the effect of improving the uplink data transmission performance in a high-load operation state.
  • the multi-carrier contention access method provided by the embodiment of the present application is as follows: in the case that the scheduling mode is the self-carrier scheduling mode, and the condition of the category one in step S104 is as follows:
  • performing the contention access of the channel according to the same first-listening LBT mechanism on each carrier in the carrier set includes:
  • the user equipment UE performs the contention access of the channel on each carrier according to the specified LBT mechanism.
  • the specified LBT mechanism includes one of the following: LBT Cat2 mechanism; enhanced LBT Cat2 mechanism; configured LBT Cat4 mechanism for long time but random backoff value N for performing LBT process; fast first After listening to the LBT mechanism, the LBT mechanism includes one of the following: the deferred period+ECA process, or the direct expansion Clean channel assessment ECCA process.
  • the competition access of the channel is performed on each carrier according to the specified mechanism of listening and speaking; wherein the designated Listening and Listening Mechanism (LBT) includes at least one of the following: LBT Cat2 mechanism, enhanced type The LBT Cat2 mechanism, the LBT Cat4 mechanism, or the fast first listener LBT mechanism, wherein the fast first listener says that the LBT mechanism includes at least one of the following: a delay defer period+ECCA mechanism or process or a direct ECCA mechanism.
  • LBT Listening and Listening Mechanism
  • the specified LBT mechanism is as follows:
  • the Clear Channel Assessment (CCA) detection duration can be configured as one of the following: 34us, 25us, 20us, 18us, 16us, 9us, or 10us. Among them: the CCA detection within the CCA detection time can be 4us or 9us. If the time when the detection channel is continuously idle is the detection duration of one of the above configurations, the transmission device considers that the usage right of the unlicensed carrier is acquired. Or, If the detection channel is busy to idle, and the time for continuously detecting the channel idle is the detection duration of one of the above configurations, the transmission device considers that the usage right of the unlicensed carrier is acquired.
  • the location where the transmission device performs LBT Cat2 is fixed.
  • the fixed position is a CCA detection duration position of at least one of the above configurations preceding the subframe boundary. If the fixed position is too far forward, it may lead to the completion of the LBT Cat2 process in advance, which requires the transmission of an initial signal or a reserved signal, which results in inefficient system.
  • multiple transmission devices are configured with the same LBT Cat2 fixed CCA detection location, which facilitates multiplexing. If there is a certain delay between different transmission devices, there will always be a high priority for the CCA location advancement, and the CCA position is always blocked. To solve this problem, the enhanced LBT Cat2 mechanism proposed in class 2 can be used.
  • Class 2 The LBT mechanism without random backoff, ie, the enhanced LBT Cat2 mechanism.
  • the difference from the class 1 is that devices in different operators or different devices in the same carrier can start CCA detection in different fixed time periods of K time segments divided in advance, in K time segments. Each may be used as a starting point for CCA detection of the device, or a random selection of a time period in K time periods as a starting point for CCA detection.
  • the device is considered to have acquired the right to use the channel.
  • the CCA detection duration can be configured as one of 34us, 25us, 20us, 18us, 16us, 9us or 10us.
  • the granularity of CCA detection within the CCA detection duration can be 4us or 9us.
  • different CCA detection starting points can be configured, or the CCA detection starting point can be randomly selected.
  • different devices can be configured with different CCA detection starting points, or the CCA detection starting point can be randomly selected.
  • the purpose is to solve the problem of collisions between devices, and there is always a problem that one party has always been unable to compete with the channel.
  • Class 3 defer period + ECCA process, ie, fast LBT mechanism.
  • the Defer period delay period is the value obtained by multiplying 16us by n by a slot. n is an integer greater than 0, and the slot is 9us.
  • the brief defer period+ECCA process is: firstly performing the CCA detection of the defer period duration, when the detection channel is idle in the defer period, the device enters the ECCA random backoff process, in the ECCA random fallback, when in a slot When the channel is detected to be idle, the device enters the next slot detection. Conversely, when the channel is detected to be busy during the slot time, the device enters the defer period.
  • the channel is idle during the slot time of the ECCA random backoff, and the random backoff value N is performed by decrementing a certain value. Until the random backoff value N is decremented to 0, the device considers that the right to use the channel is obtained.
  • the amount of decrement is 1, but is not limited to this value.
  • N may be predefined, or indicated by the base station, or randomly generated.
  • the N value may also perform a decrement operation.
  • the channel idle is detected during the entire defer period, and N performs a decrementing of a certain number of values.
  • the defer period consists of 16us and 3 slots.
  • N can perform a decrement 1 operation, or N can perform a decrement 3 operation.
  • the value of the decrement can be the same as the value of n.
  • the fast LBT mechanism also includes a direct ECCA process.
  • the direct ECCA process differs from the defer period+ECCA process in that the device directly performs the ECCA random backoff process without the first defer period delay period detection.
  • the device When the ECCA is randomly rolled back, if the channel is detected to be idle within one slot time, the device enters the next step. Subslot detection. Conversely, when the channel is busy during the slot time, optionally, the device enters the defer period or enters the next slot detection.
  • the channel is idle during the slot time, or the channel is idle during the defer period delay period, and the random backoff value N can be decremented by a certain number of operations. Until N is decremented to 0, the device considers that the right to use the channel is acquired.
  • Class 4 The LBT mechanism with random backoff, ie, the LBT Cat4 mechanism.
  • the difference from the class 3 is that the device needs to perform the first CCA detection first. If the detection channel is idle, the device enters the first defer period detection period. If the channel is idle during the first defer period detection period, the device considers that the channel is acquired. Use rights. If the device performs the first CCA detection channel to be busy, the device enters the second defer period detection period. If the channel is idle during the second defer period detection period, the device determines whether the current N value is 0. If N is 0, the device considers that the right to use the channel is obtained. If N is not 0, then an N-decreasing operation is performed or no operation is performed on N.
  • the channel busy idle detection in the slot time in the ECCA is performed. If the channel is detected to be idle during the slot time, the device enters the next slot channel detection. If the channel is busy in the slot time, the device enters the second defer period detection period, and the above is repeated until the random backoff value N is decremented to 0, and the device considers that the use right of the unlicensed carrier is successfully obtained.
  • the maximum competition window size is smaller than the competition window used in the downlink.
  • the maximum contention window can be selected from the set ⁇ 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 ⁇ .
  • the maximum contention window must be larger than the self-scheduled contention window.
  • the maximum competition can be selected from the set ⁇ 15, 31, 63, 255, 511 ⁇ .
  • the maximum contention window of the LBT Cat4 in the embodiment of the present application is only the above-mentioned example, and the multi-carrier contention access method provided by the embodiment of the present application is implemented, which is not limited.
  • the user equipment selects whether to perform an uplink LBT mechanism or perform an LBT Cat2 mechanism.
  • the usage rights for acquiring the channel include:
  • the method is processed according to a preset manner
  • the transmission device determines that the transmission device does not acquire the use right of the carrier; or, the carrier is randomly selected in the carrier that fails to perform the LBT Cat2 mechanism to satisfy the specific carrier quantity; or, directly, on the carrier that fails to perform the LBT Cat2 mechanism, the transmission device Obtaining the right to use the carrier; if the total number of carriers successfully performing the LBT Cat2 mechanism satisfies the specific number of carriers, the transmission device uses or considers that the right to use the LBT Cat2 mechanism carrier is successfully completed.
  • the user equipment if the user performs LBT Cat2 successfully on each carrier, that is, performs a CCA detection to evaluate that the channel is idle, the user equipment considers that the usage rights of the unlicensed carriers that detect the channel idle are obtained. And for performing LBT Cat2 On the failed carrier, the user equipment abandons the carrier that failed to perform the LBT Cat2 procedure.
  • the successful execution of the LBT Cat2 mechanism includes: if the channel is detected from busy to idle, and the time when the detection channel is continuously idle is greater than and/or equal to the preset idle channel evaluation CCA detection duration, or the time when the detection channel is continuously idle is greater than and / or equal to the preset idle channel evaluation CCA detection duration, it is determined that the transmission device acquires the use right of the unlicensed carrier, or completes the LBT Cat2 process.
  • Mode 1 If the channel is idle during the CCA detection time, it is considered that the LBT Cat2 is successfully executed, that is, the right to use the unlicensed carrier is obtained. . As long as the channel is busy during the CCA detection period, the LBT Cat2 is considered to be unsuccessful, that is, the right to use the unlicensed carrier cannot be obtained.
  • Mode 2 In the available channel access time period, as long as the channel is busy to idle, and the length of time during which the detection channel is continuously idle satisfies the CCA detection duration, or as long as the length of time that the detection channel is continuously idle satisfies the CCA detection duration, it is considered LBT Cat2 succeeds in obtaining the right to use an unlicensed carrier.
  • the transmitting device can simultaneously start performing the LBT Cat2 mechanism on multiple carriers, ie the starting point for performing CCA detection is the same.
  • different CCAs can be configured on multiple carriers to be aggregated for different transmission devices (UEs or base stations) in the same carrier or transmission devices in different carriers.
  • the starting position or the starting position of the CCA detection is randomly selected, in order to prevent one of the parties from always competing for the channel and the other party being blocked, thereby causing unfair access to the competition.
  • the same method is also applicable to the processing of different base stations under the same carrier or base stations under different operators in the downlink multi-carrier LBT.
  • the specified first listening mechanism is an enhanced LBT Cat2 mechanism
  • the detection start position of the CCA detection duration of the idle channel evaluation includes the fixed CCA detection start position or the CCA detection start position is randomly selected
  • the competing access of the channel on each carrier according to the specified LBT mechanism is:
  • the contention access of the channel is performed on each carrier according to an independent randomly selected CCA detection start position.
  • the contention access time area is divided into K CCA detection time segments in advance; and the fixed transmission time of each transmission device is performed on the K CCA detection time periods. A fixed starting point for K different time periods begins CCA detection.
  • different transmission devices have different fixed CCA detection starting points in K different time periods; or different transmission devices have the same fixed CCA detection starting point in K different time periods.
  • the available competition access time zone is divided into K CCA detection time segments in advance; the transmission devices in different operators or different transmission devices in the same carrier are fixed at different times in K time segments.
  • the starting point of the segment serves as the starting point for the respective CCA detection. If the detection channel is busy to idle, and the continuous detection channel idle time is greater than or It is equal to the CCA detection duration, or the time when the channel is continuously idle is detected to be greater than or equal to the CCA detection duration, and the device is considered to have acquired the right to use the channel.
  • the contention access time area is divided into K CCA detection time segments in advance; and the transmission devices randomly select respective CCAs during the K CCA detection time periods.
  • the starting point of the detection period is used as the starting point of the CCA detection; or, the transmission device randomly selects the respective CCA detection starting point on the contention access time area; or, the transmission device randomly selects the respective CCA detection period on the K CCA detection periods
  • the CCA detection starting point is randomly selected within the CCA detection time period; or, the transmission device fixes one CCA detection time period on the K CCA detection time periods, and randomly selects the CCA detection starting point in the CCA detection time period.
  • the transmission device detects that the channel is busy to idle, and the continuous detection channel idle time is greater than and/or equal to the CCA detection duration, or the detection channel is continuously idle longer than and/or equal to the preset idle channel assessment CCA detection duration, Then, it is determined that the transmission device acquires the right to use the unlicensed carrier, or completes the enhanced LBT Cat2 process.
  • the available contention time zone is divided into K CCA detection time segments in advance; the transmission devices in different operators or different transmission devices in the same carrier randomly select respective CCA detections on K time segments.
  • the starting point of the time period serves as the starting point for the CCA detection. If the detection channel is busy to idle, and the continuous detection channel idle time is not less than the CCA detection duration, or the time when the channel is continuously idle is detected to be greater than or equal to the CCA detection duration, the device is considered to have acquired the usage right of the channel.
  • the CCA detection start positions on each carrier of the transmission devices in different operators or different transmission devices in the same carrier may be the same or different. Further, in the case that the LBT mechanism is said to be fast after listening to the LBT mechanism, the contention of the channel is performed on each carrier according to the specified LBT mechanism.
  • the LBT mechanism is determined to obtain the carrier usage right for successfully completing the LBT process.
  • the LBT mechanism On each carrier, according to the fast listening first, the LBT mechanism performs the channel's contention access, and successfully completes the carrier of the LBT mechanism after the fast listening first.
  • the transmission device determines that the LBT process is successful after completing the fast first listening.
  • the LBT mechanism performs the contention access of the channel. If the last or last consecutive CCA detects that the channel is idle, the transmission device determines that the acquisition is successful and the fast first listens and then the LBT is said. Carrier use rights for the process; or,
  • the transmission device determines that the carrier usage right is acquired.
  • the LBT mechanism is performed after listening to the P (total number of carriers) carriers. If the LBT process is simultaneously performed on the P carriers, and the random backoff value N of the P carriers is decremented by 0, it is considered that the carrier is obtained. Use right. Alternatively, the transmitting device only obtains the right to use the carrier that completes the N-decreasing to 0 operation before the scheduled subframe or subframe boundary or the start of the preset start transmission time point. Alternatively, when the random backoff value N on the P carriers is decremented to a specific threshold, the P carriers simultaneously execute one LBT Cat2, successfully completing the carrier of the LBT Cat2 process, and the transmission device considers that the usage right of the carrier is obtained.
  • the transmission device considers that it has acquired the right to use its carrier.
  • the random backoff value N on the specific number of S carriers on the K carriers is decremented to a specific threshold, freeze the random backoff value on the carrier except the S carriers, or stop dividing
  • the LBT process on the carriers other than the S carriers triggers the carrier other than the S carriers to execute the LBT Cat2, and successfully completes the carrier of the LBT Cat2 process, and the transmission device considers that the use right of the carrier is obtained.
  • the CCA detection is continued on the carrier that is first decremented to a specific threshold, but the N value is not decremented.
  • the multi-carrier contention access method provided by the embodiment of the present application is only described by using the foregoing parameters as an example, and the multi-carrier contention access method provided by the embodiment of the present application is implemented, which is not limited.
  • the LBT mechanism is performed according to different listening and speaking LBT mechanisms on each carrier in the carrier set.
  • Competitive access to the channel includes:
  • a fast LBT mechanism is performed on the selected one or more carriers, and the LBT Cat2 mechanism is performed on other carriers in the carrier set when the fast LBT procedure is to be completed on one or more carriers. Further, when the fast LBT mechanism is about to be completed on the selected one or more carriers, performing the LBT Cat2 mechanism on the other carriers in the carrier set includes:
  • the other carriers in the carrier set begin to perform the LBT Cat2 mechanism; wherein the N value is first decremented to a specific threshold Self-delay operation on the carrier; or
  • the random backoff value N on each carrier is decremented, and when the N value is decremented to a specific threshold, the other carriers in the carrier set start to perform LBT. Cat2 mechanism.
  • the LBT Cat4 mechanism is selected on the primary carrier selected by the base station, and the channel is competingly accessed according to the LBT Cat2 mechanism on the secondary carrier, in the carrier set.
  • the contention access of the conditional execution channel includes:
  • the LBT mechanism is not executed, and on the carrier where the base station executes LBT Cat2, the LBT Cat4 configured to execute the LBT process but with a relatively small random backoff value N or the fast LBT process is executed. ;or,
  • the LBT mechanism On the carrier where the base station performs the LBT successfully, if the gap Gap between the downlink transmission burst and the uplink transmission burst is less than the preset value, the LBT mechanism is not executed, or the LBT Cat2 mechanism is executed.
  • performing the contention access of the channel according to the second preset condition in the carrier set includes:
  • the specified LBT Cat4 mechanism is performed on each carrier in the set of carriers; wherein the specified LBT Cat4 mechanism means that the maximum contention window size is larger than the competition window of the LBT Cat4 from the carrier scheduling and competes with the LBT Cat4 mechanism in the downlink Small window with random retreat LBT process; or,
  • the fast LBT mechanism includes: defer period+ECCA or direct ECCA process
  • a fast LBT mechanism is performed on one or more selected carriers in the set of carriers, and the LBT Cat2 mechanism is performed on the remaining carriers.
  • the fast LBT mechanism includes a delay defer period+ECCA process or a direct ECCA process
  • the contention access of the channel is performed according to the fast LBT mechanism on the K carriers specified in the specified carrier set, in the specified carrier set.
  • the contention of the channel on the remaining carriers in accordance with the LBT Cat2 mechanism includes:
  • Competing access of the channel is performed on the K carriers specified in the specified carrier set according to the defer period+ECCA procedure or the direct ECCA procedure, and the channel is competing access according to the LBT Cat2 mechanism on the remaining carriers in the specified carrier set;
  • the LBT Cat2 mechanism is triggered on the remaining carriers.
  • the K-1 carriers freeze the current random backoff value or stop the deer period+ECCA process on the K-1 carriers, and execute the LBT Cat2 mechanism, and The LBT Cat2 mechanism is started on a carrier other than K carriers;
  • K is a value greater than or equal to 1 and less than the total carrier number P.
  • the carrier methods for selecting K performing fast LBT mechanisms are the same as above.
  • Fast LBT mechanisms such as: defer period + ECCA process (denoted as fast LBT mechanism 1), direct ECCA process (denoted as fast LBT mechanism 2).
  • the fast LBT mechanism 1 is taken as an example to describe the multi-carrier contention access method in this embodiment.
  • the transmission device performs the channel accession access according to the defer period+ECCA procedure on a specific K carriers, and follows the LBT Cat2 mechanism on the remaining carriers. Perform competitive access to the channel. If the defer period+ECCA process is to be completed on one of the K carriers, the remaining K-1 carriers freeze the current random backoff value or stop the defer period+ECCA procedure on the carrier, and then execute the LBTCat2 mechanism. At the same time, the LBT Cat2 mechanism is also started on the carrier except the K carriers. If the transmission device successfully completes the LBT process according to the respective LBT mechanism on each carrier, it is considered that the right to use the carrier corresponding to the LBT process is successfully obtained. or,
  • the LBT Cat2 mechanism is executed on the remaining carriers.
  • the transmission device On the carrier that detects that the channel is idle, the transmission device considers that the right to use the carrier is obtained.
  • the completion of the respective LBT process on each carrier must be completed before the start of the subframe of the scheduling user equipment or before the subframe boundary or the transmission start time.
  • the completion of the K carriers means that when the random backoff value N on the K carriers is decremented to a specific threshold, the LBT Cat2 mechanism is triggered on the other carriers.
  • the carrier continues to perform channel idle detection, but the N value is not decremented until all the N values of the K carriers are decremented to a specific
  • the carrier other than the K carriers is triggered to execute LBT Cat2.
  • the specific threshold may be predefined, or indicated by the base station, or a value that is rounded off by an N of less than the value of N, where M is less than N, or a value is randomly selected within a range less than the value of N.
  • the specific threshold can be 0, that is, when the value of N on the K carriers is decremented to 0, the LBT Cat2 can be triggered on other carriers. or,
  • the defer period+ECCA mechanism is performed on a carrier with an odd carrier index number, and the LBT Cat2 mechanism is performed on an even carrier.
  • the method of triggering LBT Cat2 on the even carrier is the same as above. or,
  • the number of carriers that are about to complete the defer period+ECCA reaches a certain threshold, and the threshold is less than or equal to K, triggering the execution of LBT Cat2 on other carriers.
  • the meaning of the LBT Cat4 is about to be completed as described above.
  • determining to acquire channel usage rights includes:
  • the carrier of the specified LBT Cat4 mechanism or the fast LBT mechanism is about to be completed. If the current random backoff value N satisfies the preset threshold, then other specified LBT Cat4 mechanisms are being executed or fast.
  • the LBT process on the carrier of the LBT mechanism immediately performs the LBT Cat2 mechanism; in the case that the carrier corresponding to the LBT process is completed on each carrier, the transmission device determines that the right to use the carrier that successfully completes the LBT process is obtained; or
  • the transmission device determines the right to use the acquired carrier.
  • the size of the maximum contention window should be smaller than the competition window used in the downlink.
  • the maximum contention window can be selected from the set ⁇ 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 ⁇ .
  • the maximum contention window size can be larger than the self-scheduled contention window, and its maximum contention can be selected from the set ⁇ 15, 31, 63, 255, 511 ⁇ .
  • a random backoff value N can be independently generated on each carrier, or the base station indicates a random backoff value N used by the UE in each carrier, or a random backoff value N used on each carrier is predefined.
  • the random backoff value N on each carrier may be the same or different.
  • the step of performing the contention access of the channel according to the specified LBT mechanism on each carrier includes at least one of the following:
  • the reserved signal is transmitted on the carrier;
  • the carrier is discarded; or if the current random on the carrier If the backoff value N is decremented to a preset threshold, it is determined that the usage right on the carrier is obtained;
  • the carrier of the LBT Cat4 mechanism is first completed. If the time of successfully completing the LBT mechanism does not reach the transmission start time or the subframe boundary, the transmission device may send a reserved signal on the carrier (a pre-transmission of a specific muting pattern may be sent) Leave the signal) or send the initial signal to notify the preempted carrier condition or the occupied channel, or other functions. Continue to perform CCA detection on the other carrier without completing the LBT process. If the LBT process is still not completed on some carriers at the beginning of the transmission time or the subframe boundary or until the specified time period for CCA detection, the carrier is either abandoned or the current random on the carrier is evaluated.
  • the transmitting device can use all carriers that successfully complete the LBT Cat4 process for information transmission. Such as: uplink data, or the transmission of downlink data.
  • the self-delay operation is performed;
  • the transmission device can perform the self-delay operation.
  • the time granularity of the self-delay may be the slot length.
  • the transmitting device may continue to perform the ECCA process during the period from the LBT success time to the start transmission time or the subframe boundary, that is, regenerate an N value, and the maximum value of N needs to be determined according to the remaining time and the slot time length 9us. .
  • the LBT Cat2 mechanism is executed multiple times, and when the number of times the channel is idle is satisfied to meet a certain threshold in the plurality of LBTs, the right to use the carrier is considered to be acquired as long as the LBT Cat2 is successfully executed last time.
  • the CCA detection continues on the carrier that has not completed the LBT Cat4 process before the start of the transmission time or before the start of the specified start transmission. If the carrier of the LBT Cat4 process is still completed at the specified start transmission time or subframe boundary, either the carrier is abandoned or the current random backoff value N is determined to meet a certain threshold. If it is satisfied, it is considered Get the right to use the carrier. Alternatively, it is detected whether the last CCA detection is that the channel is idle, and if it is idle, it is considered that the usage right of the carrier is acquired.
  • the random backoff value N is decremented to a preset threshold
  • the random backoff value in the LBT Cat4 process on the other carriers is adjusted to a preset threshold
  • the carrier of the LBT process is not completed, and the last CCA detection channel on the carrier is idle, or the current random backoff value N on the carrier is at a preset threshold, it is determined that the usage right of the carrier is obtained.
  • the carrier that is about to complete the LBT Cat4 process starts the self-delay and self-delay time granularity is a slot length (9 us) when the random backoff value N is decremented to a certain threshold, and the channel is detected during the self-delay period. Idle, the random backoff value N is not decremented.
  • the purpose is to wait for the LBT process on other carriers.
  • the number of self-delay times may be predefined, or the number of consecutive or discrete self-delay times may be adjusted according to the statistics of the number of LBT successes or failures from the delay value in the previous period of time, or according to the distance
  • the subframe boundary or the remaining time of the start time of the transmission of the subframe is determined, or the number of self-delay can be determined according to the LBT execution condition on the other carriers.
  • the failed carrier is abandoned, or if the failed N value is not decremented to 0 due to the execution of the self-delay on the carrier, it may be further determined whether the N value at this time satisfies a certain threshold, and if so, It is considered that the user equipment can use the carrier. Or because the channel condition is very poor or the interference is severe, the channel detection is busy a lot, so that the N value is decremented very slowly, and further determining that the channel is idle during the last CCA detection, and/or the current random backoff value If N meets a certain threshold, it is considered that the user equipment can use the carrier.
  • the rate is first decremented to At a certain threshold, the random backoff value on the other carriers is adjusted to the current N value on the carrier that is about to succeed. Thereby, it is ensured that the LBT process can be completed with a very high probability on each carrier, thereby obtaining the usage right on the corresponding carrier.
  • a plurality of threshold values may be set. When a threshold is met, the random backoff value on all carriers is adjusted to meet the current random backoff value on the first threshold carrier. When the random backoff value is decremented to a carrier of 0, the transmission device considers that the right to use the carrier is acquired, which can be used for information transmission. Alternatively, the random backoff value on the carrier satisfies a preset threshold value, and it may also be considered that the right to use the carrier is acquired, and information transmission may be performed.
  • the random backoff value N is decremented.
  • the LBT Cat4 process is completed on all carriers to use multiple unlicensed carriers.
  • the content access mode of the fast LBT mechanism in the embodiment of the present application is the same as that of the LBT Cat4 mechanism, that is, according to the defer period+ECCA process and the direct ECCA process.
  • the fast LBT mechanism is adopted in order to allow the transmission device to complete the contention access of the channel on the multiple carriers as soon as possible to obtain the right to use the channel.
  • the N value is an integer between 0 and q
  • q is a value between the minimum contention window and the maximum contention window.
  • the maximum contention window size can be from ⁇ 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 31, 63 , 255, 511 ⁇ select in the collection.
  • the data packets transmitted by the transmission device on each carrier may be the same or different.
  • the resource location and resource block size allocated to the transmission device on each carrier may be the same or different.
  • the other carriers can perform an LBT Cat2 mechanism, wherein the detection duration can be an integer multiple of 9 us.
  • the detection duration is related to the current N value of the LBT process to be completed. For example, the random backoff value N in the LBT process on carrier 1 is decremented to 2, and other carriers are enabled to execute LBT Cat2, and the CCA detection duration may be 9us, 18us. Or a multiple of 9us, the maximum value cannot exceed the duration between the current time and the boundary of the subframe.
  • determining to acquire the channel usage rights includes:
  • the LBT Cat2 mechanism is executed on the remaining carriers.
  • each carrier completes its corresponding LBT process, it is determined that the LBT is successfully completed. The right to use the carrier of the process; or,
  • the LBT Cat2 mechanism is executed on the remaining carriers.
  • the decision is obtained. Successful use of the carrier of the LBT process; or,
  • Performing the specified LBT Cat4 mechanism on multiple selected carriers in the set of carriers if at least one carrier is about to complete the specified LBT Cat4 mechanism, performing the LBT Cat2 mechanism on the remaining carriers, when each carrier completes its own In the corresponding LBT process, it is determined that the right to use the carrier that successfully completes the LBT process is obtained.
  • the specified carrier set is specified.
  • the remaining K-1 carriers in the middle freeze the current random backoff value, or stop the LBT Cat4 process on the carrier, perform the LBT Cat2 mechanism; and start executing the LBT Cat2 mechanism on the carrier other than the K carriers in the specified carrier set; or ,
  • the LBT Cat2 mechanism is executed on the other carriers in the specified carrier set;
  • the LBT Cat4 process is about to be completed on the K carriers.
  • the random backoff values N on the K carriers are all reduced to a preset threshold, the LBT Cat2 mechanism is triggered on other carriers in the specified carrier set.
  • the carrier set for channel contention access according to the LBT Cat4 mechanism is first selected, and may be randomly selected, or predefined, or indicated by the base station, or the UE reports the channel condition on each carrier, and the method is determined by the base station. Or, the UE autonomously determines according to the interference situation.
  • the transmission device performs contention access of the channel according to the LBT Cat4 mechanism on a specific K carriers, and performs contention access of the channel according to the LBT Cat2 mechanism on the remaining carriers. If LBT Cat4 is about to be completed on one of the K carriers, the remaining K-1 carriers freeze the current random backoff value, or stop the LBT Cat4 process on their carrier, and instead execute the LBT Cat2 mechanism. At the same time, the LBT Cat2 mechanism is also started on carriers other than K carriers. If the transmission device successfully completes the LBT process according to the respective LBT mechanism on each carrier, it is considered that the right to use the carrier corresponding to the successful completion of the LBT process is obtained. or,
  • the LBT Cat2 mechanism is executed on the remaining carriers.
  • the transmission device On the carrier that detects that the channel is idle, the transmission device considers the right to use the carrier.
  • the completion of the respective LBT process on each carrier must be completed before the start of the subframe of the scheduling user equipment or before the subframe boundary or before the transmission start time.
  • the completion of the K carriers means that when the random backoff value N on the K carriers is decremented to a specific threshold, the LBT Cat2 mechanism is triggered on the other carriers.
  • the carrier continues to perform channel idle detection, but the N value is not decremented until all the N values of the K carriers are decremented to a specific At the threshold, the carrier other than the K carriers is triggered to execute LBT Cat2.
  • the specific threshold may be predefined, or indicated by the base station, or a value that is rounded off by an N of less than the value of N, where M is less than N, or a value is randomly selected within a range less than the value of N. or,
  • the LBT Cat4 mechanism is implemented on a carrier with an odd carrier index number, and the LBT Cat2 mechanism is performed on an even carrier.
  • the method of triggering LBT Cat2 on the even carrier is the same as above. or,
  • the number of carriers that are about to complete LBT Cat4 reaches a certain threshold, and its threshold is less than or equal to K, triggering LBT Cat2 on other carriers.
  • the meaning of the LBT Cat4 is about to be completed as described above.
  • K is a value greater than or equal to 1.
  • determining to obtain the channel usage rights includes:
  • the pre-transmission may be sent. Leave the signal, or perform the self-delay operation; the carrier that has not completed the corresponding LBT process continues to perform the CCA detection. If the carrier of the LBT process is still not completed at the beginning of the transmission, it is determined that the current random backoff value N on the carrier meets the specific threshold. Or if the last or last consecutive CCA detection channels are idle, it is determined that the right to use the carrier that successfully completes the LBT process is obtained; or
  • the random backoff value N on the carrier satisfies the first threshold value
  • the random backoff value N on the other carriers is adjusted to the first threshold; if the random backoff value N on the carrier after adjusting the random backoff value N satisfies the second threshold, the random back on the other carriers
  • the value N is adjusted to the second threshold value, and so on, before the start of the transmission time, if the random backoff value N is decremented to 0 or the carrier corresponding to the LBT process is completed, or if the carrier is not before the start of the transmission time
  • the current random backoff value N on the carrier satisfies the preset threshold, or the last one
  • the secondary or last consecutive CCA detection channels are idle, and the transmission device determines to obtain the right to use the carrier that successfully completes the LBT procedure.
  • the start time of the LBT process performed on each carrier is the same or different.
  • the random backoff value on each carrier may be configured to be the same value, or may be independently generated to generate a random backoff value.
  • the transmission device is deemed to have obtained the right to use the unlicensed carrier that successfully completes the LBT process;
  • the random backoff value N on the K carriers is decremented to the specified preset value
  • the random backoff value of the carrier performing the fast LBT mechanism is frozen, or the LBT process on the carrier of the fast LBT mechanism is stopped, and the carrier is executed.
  • LBT Cat2 successfully completing the carrier of the LBT Cat2 process, and determining to obtain the right to use the carrier; or,
  • the random backoff value N on the specified number of S carriers on the K carriers is decremented to a preset value, the random backoff value on the carrier except the S carriers is frozen, or the S carriers are stopped.
  • the LBT process on the external carrier triggers the carrier other than the S carriers to execute the LBT Cat2, and successfully completes the carrier of the LBT Cat2 process, and determines that the usage right of the carrier is obtained, where S is less than K; or
  • the random backoff value N on at least one of the carriers is decremented to a specified preset value
  • the current random backoff value on the other carrier is frozen, or the LBT process on the carrier corresponding to the LBT mechanism is stopped, and the carrier is triggered.
  • Execute LBT Cat2 successfully complete the carrier of the LBT Cat2 process, and determine that the right to use the carrier is obtained;
  • the method for selecting the K carriers of the LBT Cat4 mechanism is: randomly selecting, or pre-defined, or the base station indicates, or the UE reports the channel condition on each carrier, determined by the base station, or the UE Autonomously determined according to the interference situation.
  • the channel interference condition on the K carriers is the smallest.
  • the minimum value of K can be 1.
  • the same random backoff value N may be used on each carrier, or a random backoff value N is generated on each carrier.
  • the same value of N can be a base station configuration or predefined.
  • the maximum contention window size in Cat4 must be smaller than the competition window used in the downlink.
  • the number of OFDMs used for performing the LBT process is limited, preferably one OFDM symbol or two OFDM symbols, and the maximum contention window can be from the set ⁇ 3, 4, 5, 6, 7, 8, 9, 10, Choose from 11,12,13,14,15 ⁇ .
  • the maximum contention window may be 31, 63, 125, 255, 511.
  • the multi-carrier contention access method provided by the embodiment of the present application further includes:
  • the processing flow is executed according to a preset manner; wherein the preset manner includes one of:
  • the different data is sent on the same resource. If the Rank Indicator (RI) is greater than 2, the resource can be multiplexed for transmission, or the random access radio network temporary identifier (Random Access Radio Network Temporary Identifier) , referred to as RNTI) or Cycle Shift (CS) encoding, sending different data blocks on the same resource.
  • RNTI Random Access Radio Network Temporary Identifier
  • CS Cycle Shift
  • the data packet to be transmitted by the UE transmits a part of each of the specific multiple carriers.
  • the data packet allocated on the carrier will not be transmitted on the carrier that fails the LBT process.
  • This part of the data packet can be retransmitted.
  • the data packet is transmitted on an alternate resource on a carrier that competes successfully.
  • multiplexing resources on other carriers to transmit together wherein different data is sent on the same resource, if the RI is greater than 2, the resources may be multiplexed for transmission, or different identities may be sent on the same resource through RNTI or CS coding. data block.
  • an additional (alternative) resource block is indicated on a certain carrier for transmitting data packets of other carriers when the LBT fails.
  • the triggering of the candidate resource is that the UE learns that the carrier that is not successfully executed by the LBT Cat2 among the multiple carriers to be aggregated before the data starts to be transmitted or before the arrival of the subframe boundary, and triggers the standby resource on the carrier that successfully completes the LBT process. If the time when the user equipment completes the LBT process does not reach the subframe boundary or starts the transmission time, the reserved signal needs to be sent on all carriers completing the LBT process until the subframe boundary, or the transmission moment is started.
  • the user equipment performs LBT Cat2 failure on multiple carriers to be aggregated within the available channel contention access period, the user equipment abandons the transmission.
  • each carrier group may adopt the same LBT mechanism, or part carrier groups in the carrier group adopt one LBT mechanism, and the remaining carrier groups adopt another An LBT mechanism.
  • the LBT process may not be performed on the uplink multiple carriers, or multiple carriers may be used. Some of the upper carriers perform LBT Cat2, and LBT is not executed on some carriers. The reason is that the LBT Cat4 mechanism has been implemented on the corresponding carrier on the base station side. Therefore, the UE may not perform the LBT process from the perspective of ensuring the fairness of the access access of the channels of the licensed assisted access (LAA) and the WIFI system. Further, in order to avoid hidden node problems, the UE side can perform the LBT Cat2 mechanism before transmitting. It is also possible to use a combination of LBT Cat2 and no-LBT.
  • the foregoing multi-carrier contention access method may be used for the uplink, the first subframe of the uplink transmission, or the first subframe after the user equipment starts to transmit, and the subsequent uplink subframes on each carrier may also be used.
  • the contention access method adopted by the previous subframe on the carrier, or the subsequent UE still scheduling the same UE, and the resource locations may be the same or different, the UE may not perform LBT, or only execute one LBT Cat2 (CCA detection can be on some muting RE patterns Test). If it is not the same UE scheduled, the same LBT mechanism as the previous subframe may be used, or a smaller window or a more simplified LBT mode than the competition window of the LBT mechanism used in the previous subframe.
  • the manner in the foregoing embodiment may be applied to a cross-carrier scheduling situation, in which the base station side does not perform an LBT process.
  • the self-carrier scheduling situation is slightly different. The reason is that the LBT Cat4 or LBT Cat2 mechanism has been implemented on the base station side.
  • the UE side needs to properly adjust the competing access mechanism used on the multi-carrier to avoid the coexistence of the LAA and WIFI systems.
  • the LAA system is in a disadvantage of competing access channels.
  • the base station may notify the UE on which unlicensed carriers to perform contention access on the unlicensed carrier through a DCI on the authorized carrier, and resource allocation or scheduling information on each carrier. Or, the base station sends multiple sets of authorization information to the UE on the authorized carrier, and each set of authorization information respectively corresponds to one carrier and scheduling information of the user on the carrier; or, the base station sends on a specific carrier in the contention unlicensed carrier set.
  • Carrier information and scheduling information of the UE on the unlicensed carrier set wherein: one DCI information may be transmitted on an unlicensed carrier, the unlicensed carrier set including the contention access of the channel performed by the UE, and the scheduling information on each carrier; Or, multiple DCI information may be sent on one unlicensed carrier, where each DCI information includes one carrier information and one scheduling information; or, each DCI information may be separately sent on each carrier that the base station contends, and each The DCI information transmitted on the carrier includes one carrier information and one scheduling information.
  • the multi-carrier contention access method provided in the embodiment of the present application is also used in the single-carrier LBT competition access mode, how to solve the equipment under different operators or between different devices under the same operator. Blocking problem. details as follows:
  • the enhanced LBT Cat2 mechanism is used to solve the blocking problem between devices under different operators or different devices under the same carrier.
  • the starting position of the CCA detection is fixed, and the devices under different operators or different devices under the same carrier are in the configured time interval for channel contention access.
  • the K time segments divided in advance are selected or according to a certain fixed time period as the starting point of the respective CCA detection; or, randomly, one time period is randomly selected in the K time segments as the starting point of the CCA detection.
  • the device is considered to obtain the channel usage right.
  • the CCA detection duration can be configured as one of 34us, 25us, 20us, 18us, 16us, 9us or 10us.
  • different CCA detection starting points can be configured, or the CCA detection starting point can be randomly selected.
  • different devices can be configured with different CCA detection starting points, or the CCA detection starting point can be randomly selected. The purpose is to solve the problem of collisions between devices, and there is always a problem that one party has always been unable to compete with the channel.
  • the base station or UE under different operators can be pre-defined.
  • the different CCA detection start positions, or the base stations under different operators are configured in the background to perform CCA detection from different CCA detection start positions.
  • different base stations can be configured with different CCA detection start positions according to a predefined method, or an X2 port interaction mode, or a background configuration mode.
  • different UEs under the same carrier different UEs can be configured with different CCA detection start positions according to a predefined method, or a base station indication manner, or a background configuration manner.
  • the devices under different operators or different devices under the same operator may be in two symbols in the last two OFDM symbol time intervals of each of the consecutive 5 subframes.
  • the fixed CCA detection starting points are configured for devices under different operators or different devices under the same carrier according to the K-shaped CSA detection time period, or the CCA detection starting point may be randomly selected.
  • the CCA detection starting point is fixed, or the CCA detection starting point can be randomly selected.
  • the time of two symbols is divided into seven 20 Cus detection periods.
  • the CCA detection starting point configured for the base station 1 is the second CCA detection time period, that is, starting from 21 us, by the method of fixedly configuring different CCA detection starting points.
  • the CCA detection is performed, and the CCA detection starting point configured by the base station is the fourth CCA detection time period, that is, the CCA detection is started from the time of 61us.
  • the base station 1 has an extremely high chance of acquiring channel usage rights.
  • the starting position where the base station 1 and the base station 2 perform CCA detection may be changed, or the CCA detection starting position of the base stations 1 and 2 may be exchanged.
  • base stations 1 and 2 can randomly select respective CCA detection time starting points during the 7 CCA detection periods. In this way, there will be a case where both the base station 1 and the base station 2 select the same time period to start performing CCA detection, thereby causing a collision.
  • the method according to the above embodiment can be implemented by means of software plus a necessary general hardware platform, and of course, by hardware, but in many cases, the former is A better implementation.
  • the technical solution of the present invention which is essential or contributes to the prior art, may be embodied in the form of a software product stored in a storage medium (such as ROM/RAM, disk,
  • the optical disc includes a number of instructions for causing a terminal device (which may be a cell phone, a computer, a server, or a network device, etc.) to perform the methods described in various embodiments of the present invention.
  • a competing access device for a carrier is also provided, and the device is configured to implement the foregoing embodiments and preferred embodiments, and details are not described herein.
  • the term "module” may implement a combination of software and/or hardware of a predetermined function.
  • the apparatus described in the following embodiments is preferably implemented in software, hardware, or a combination of software and hardware, is also possible and contemplated.
  • FIG. 2 is a structural block diagram of a multi-carrier contention access apparatus according to an embodiment of the present invention. As shown in FIG. 2, the apparatus package Included: an acquisition module 22 and an access module 24, wherein
  • the obtaining module 22 is configured to acquire, according to the first preset condition, a carrier set that performs an LBT mechanism after the first listening;
  • the access module 24 is configured to perform contention access of the channel according to the second preset condition in the carrier set according to a preset scheduling manner.
  • the multi-carrier contention access device acquires a carrier set that performs the LBT mechanism after the first listening according to the first preset condition; according to the preset scheduling mode, according to the second preset condition in the carrier set Perform competitive access to the channel.
  • the invention solves the problem that the uplink data transmission performance is in a high-load running state due to the lack of the uplink multi-carrier LBT contention access method, thereby achieving the effect of improving the uplink data transmission performance in a high-load operation state.
  • the first preset condition includes: indicating by the base station; or, the base station indication is combined with the user equipment UE selection; or the user equipment UE is autonomously selected; or, predefined.
  • the preset scheduling manner includes: a self-carrier scheduling mode, or a cross-carrier scheduling mode.
  • the second preset condition includes: performing, on each carrier in the set of carriers, the contention access of the channel according to the same LBT mechanism; or, respectively, on each carrier in the carrier set according to different After listening, the LBT mechanism performs the competitive access of the channel.
  • the access module 24 includes: a first access unit, configured to: when the scheduling mode is the self-carrier scheduling mode, the user equipment UE performs the channel according to the specified LBT mechanism on each carrier.
  • Competitive access the specified LBT mechanism includes one of the following: LBT Cat2 mechanism; enhanced LBT Cat2 mechanism; LBT Cat4 mechanism configured for long time but random backoff value N for performing LBT process;
  • the LBT mechanism is quickly listened to first; among them, the LBT mechanism after fast listening first includes one of the following: delay + extended clean channel evaluation defer period + ECCA process, or directly extended clean channel evaluation ECCA process.
  • the executing unit is configured to select whether to perform an uplink LBT mechanism or perform an LBT Cat2 mechanism when a gap Gap duration between the downlink transmission burst and the uplink transmission burst is less than or equal to a preset threshold.
  • the apparatus includes: a first determining module configured to perform channel contention access when the LBT Cat2 mechanism is used on each carrier in the carrier set in a case where the specified listening mechanism is an LBT Cat2 mechanism Performing the contention access of the channel according to the LBT Cat2 mechanism on each carrier, and determining that the carrier of the LBT Cat2 mechanism carrier is successfully completed for the carrier that successfully completes the LBT Cat2 mechanism; or, the second determination module is set to be at K If the LBT Cat2 mechanism is successfully executed on the S carriers, if the LBT Cat2 mechanism fails to be executed on the remaining carriers, if the total number of carriers that successfully implement the LBT Cat2 mechanism does not satisfy the specific number of carriers, it is processed according to a preset manner;
  • the preset manner includes: determining that the transmission device does not acquire the use right of the carrier; or randomly selecting the carrier to satisfy the specific carrier quantity in the carrier that fails to perform the LBT Cat2 mechanism; or directly evaluating the carrier that fails to perform the LBT Cat2 mechanism
  • the transmission device acquires the right to
  • the successful execution of the LBT Cat2 mechanism includes: if the channel is detected from busy to idle, and the time when the detection channel is continuously idle is greater than and/or equal to the preset idle channel evaluation CCA detection duration, or the time when the detection channel is continuously idle is greater than and / or equal to the preset idle channel evaluation CCA detection duration, it is determined that the transmission device acquires the use right of the unlicensed carrier, or completes the LBT Cat2 process.
  • the first access unit includes: a first detecting subunit, configured to say that the mechanism is an enhanced LBT Cat2 mechanism after the specified first listening, and the detection starting position of the idle channel evaluation CCA detecting duration includes the fixed CCA detection.
  • the contention access of the channel is performed according to the common fixed CCA detection start position on each carrier; or, the second detection subunit is set to be in each carrier Performing contention access of the channel according to an independent fixed CCA detection start position; or, the third detection subunit is configured to perform contention access of the channel according to a common randomly selected CCA detection start position on each carrier Or, the fourth detecting subunit is configured to perform contention access of the channel on each carrier according to an independently randomly selected CCA detection starting position.
  • the contention access time area is divided into K CCA detection time segments in advance; and the fixed transmission time of each transmission device is performed on the K CCA detection time periods. A fixed starting point for K different time periods begins CCA detection.
  • different transmission devices have different fixed CCA detection starting points in K different time periods; or different transmission devices have the same fixed CCA detection starting point in K different time periods.
  • the contention access time area is divided into K CCA detection time segments in advance; and the transmission devices randomly select respective CCAs during the K CCA detection time periods.
  • the starting point of the detection period is used as the starting point of the CCA detection; or, the transmission device randomly selects the respective CCA detection starting point on the contention access time area; or, the transmission device randomly selects the respective CCA detection period on the K CCA detection periods
  • the CCA detection starting point is randomly selected within the CCA detection time period; or, the transmission device fixes one CCA detection time period on the K CCA detection time periods, and randomly selects the CCA detection starting point in the CCA detection time period.
  • the transmission device detects that the channel is busy to idle, and the continuous detection channel idle time is greater than and/or equal to the CCA detection duration, or the detection channel is continuously idle longer than and/or equal to the preset idle channel assessment CCA detection duration, Then, it is determined that the transmission device acquires the right to use the unlicensed carrier, or completes the enhanced LBT Cat2 process.
  • the first access unit includes: a first determining sub-unit, configured to perform a fast listening on each carrier in a case where the LBT mechanism is said to be fast after listening to the LBT mechanism after the specified listening After the LBT mechanism completes the contention access of the channel, it is determined that the carrier usage right of the LBT process is successfully completed; or the second determining subunit is set to perform the LBT mechanism according to the fast first listening on each carrier.
  • the transmission device determines that the carrier usage right of the LBT process is successfully completed after completing the fast first listening; or, after completing the fast first listening.
  • the transmission device considers that the carrier is unavailable, or, for a carrier that does not complete the fast listening and LBT mechanism, if the random backoff value N satisfies a specific threshold, the transmission device determines that the carrier is successful.
  • the carrier usage right of the LBT process is said; if the random backoff value N does not satisfy the specific threshold, it is determined that the carrier usage right is not acquired, or the carrier is abandoned; or Third determination sub-unit, arranged to On each carrier, according to the fast first listening and then speaking, the LBT mechanism performs the contention access of the channel. If the last or last consecutive CCA detects that the channel is idle, the transmission device determines that the successful completion of the fast first listening and then the LBT process is obtained.
  • the carrier usage right; or, the fourth determining subunit is set to if there is a carrier that is about to complete the fast first listening and then the LBT mechanism, the other carrier stops the current LBT process, and immediately performs the channel competition according to the LBT Cat2 mechanism. Access, the carrier of the corresponding LBT process is completed before the start of the transmission time, and the transmission device determines that the carrier usage right is acquired.
  • the access module 24 includes: a first execution unit configured to, in the self-carrier scheduling mode, in a case where the base station performs a contention access of the channel according to the LBT Cat4 mechanism on each carrier, in the selected one or The LBT Cat2 mechanism is implemented on multiple carriers, and the LBT mechanism is not performed on other carriers in the carrier set; the second execution unit is configured to perform a fast LBT mechanism on the selected one or more carriers in the carrier set. The LBT mechanism is not implemented on the other carriers; the third execution unit is configured to perform a fast LBT mechanism on the selected one or more carriers, when the fast LBT process is to be completed on one or more carriers, in the carrier set The LBT Cat2 mechanism is implemented on the other carriers.
  • the third execution unit includes: a first execution subunit, configured to start performing other carriers in the carrier set when the random backoff value N in the fast LBT process performed on one carrier is decremented to a specific threshold The LBT Cat2 mechanism; or, the second execution subunit, is configured to start performing LBT on other carriers in the carrier set when the random backoff value N in each of the multiple carriers performing the fast LBT process is decremented to a specific threshold a Cat2 mechanism; wherein a self-delay operation is performed on a carrier whose N value is first decremented to a specific threshold; or a third execution subunit is set to perform a fast LBT process on multiple carriers while detecting a channel idle time, The random backoff value N on each carrier is decremented, and when the N value is decremented to a certain threshold, the other carriers in the carrier set begin to perform the LBT Cat2 mechanism.
  • a first execution subunit configured to start performing other carriers in the carrier set when the random backoff value N in the fast LBT process performed on one carrier is de
  • the access module 24 includes: a fourth execution unit, configured to perform the LBT Cat4 mechanism on the primary carrier selected by the base station and the LBT Cat2 mechanism on the secondary carrier in a preset scheduling mode of the self-carrier scheduling mode.
  • the LBT Cat2 mechanism is performed on the primary carrier indicated by the base station, and the simplified LBT Cat4 or fast LBT mechanism is performed on the secondary carrier indicated by the base station side; or, the fifth execution unit is set to The LBT Cat2 mechanism is performed on each carrier in the set of carriers; or the sixth execution unit is configured to perform a long time but a random backoff value N for performing the configured LBT process on each carrier in the set of carriers.
  • a small LBT Cat4 or a fast LBT mechanism configured to perform the LBT mechanism on the carrier performing the LBT Cat4 on the base station, and perform the configured LBT process on the carrier performing the LBT Cat2 on the base station
  • the LBT Cat4 with a long time but a random backoff value N is relatively small or performs a fast LBT process
  • the eighth execution unit is set to be on the carrier where the base station performs LBT successfully, if If the gap Gap between the line transmission burst and the uplink transmission burst is less than a preset value, the LBT mechanism is not executed, or the LBT Cat2 mechanism is executed.
  • the access module 24 includes: a ninth execution unit, configured to perform a specified LBT Cat4 mechanism on each carrier in the carrier set in a preset scheduling manner in a cross-carrier scheduling manner; wherein the designated LBT
  • the Cat4 mechanism refers to an LBT process in which the maximum contention window size is larger than the competition window of the self-carrier scheduling execution LBT Cat4, and has a random back-off than the competition window in which the LBT Cat4 mechanism performs downlink; or the tenth execution unit is set to Performing a fast LBT mechanism on each carrier in the set of carriers; wherein: the fast LBT mechanism includes: defer period+ECCA or direct ECCA procedure; or, the eleventh execution unit, is set to be selected in the carrier set or Execute the specified LBT on multiple carriers
  • the LBT Cat2 mechanism is performed on the remaining carriers when the Cat4 mechanism is about to succeed; or the twelfth execution unit is set to perform a specific LBT Cat4 mechanism on the selected one or more carriers in the set of carriers, on the remaining
  • the apparatus further includes: a fifth determining subunit configured to determine that the specified LBT Cat4 mechanism is successfully completed if the specified LBT Cat4 mechanism or the fast LBT mechanism is completed on each carrier in the carrier set Or the right of the carrier of the fast LBT mechanism; or, the sixth determining subunit, is set to be in the carrier set, that is, the carrier of the specified LBT Cat4 mechanism or the fast LBT mechanism is to be completed, if the current random backoff value N is satisfied
  • the preset threshold is used, the LBT process on the carrier that is executing the specified LBT Cat4 mechanism or the fast LBT mechanism is stopped, and the LBT Cat2 mechanism is executed immediately; in the case of completing the carrier corresponding to the LBT process on each carrier And the transmitting device determines that the right to use the carrier that successfully completes the LBT process is obtained; or the seventh determining subunit is configured to complete the specified LBT Cat4 mechanism or the fast LBT mechanism on the partial carrier in the carrier set, and the designation is not completed.
  • the transmission device determines the right to use the acquired carrier.
  • the eleventh execution unit includes: a ninth decision subunit configured to perform a specified LBT on a selected carrier in the set of carriers.
  • the LBT Cat2 mechanism is executed on the remaining carriers, when each When the respective LBT processes are completed on each of the carriers, it is determined that the right to use the carrier that successfully completes the LBT process is obtained; or the tenth determining subunit is set to perform the specified on the plurality of carriers selected in the carrier set.
  • the LBT Cat2 mechanism is implemented on the remaining carriers, and when the respective LBT processes are completed on each carrier, it is determined that the right to use the carrier that successfully completes the LBT process is obtained; or, the eleventh a decision subunit, configured to perform a specified LBT Cat4 mechanism on a plurality of selected carriers in the set of carriers, if at least one carrier is about to complete the specified LBT Cat4 mechanism, performing an LBT Cat2 mechanism on the remaining carriers, when each When the respective LBT processes are completed on each of the carriers, it is determined that the right to use the carrier that successfully completes the LBT process is obtained.
  • the twelfth execution unit includes: a twelfth decision subunit configured to perform a specified LBT Cat4 mechanism on a selected one of the carrier sets, and perform a fast LBT mechanism on the remaining carriers, If the corresponding LBT process is completed before the start of the transmission on each carrier, it is determined that the right to use the carrier that successfully completes the LBT process is obtained; or the thirteenth determining subunit is set to be executed on the selected carrier in the carrier set.
  • the specified LBT Cat4 mechanism performs a fast LBT mechanism on the remaining carriers, if the corresponding LBT process is not completed on some carriers before the transmission starts, if the LBT process is not completed on the carrier If the random backoff value N satisfies the preset threshold value, it is determined that the right to use the carrier that successfully completes the LBT process is obtained; or the fourteenth determining subunit is set to perform the designation on the selected carrier in the carrier set.
  • LBT Cat4 mechanism in the case of performing fast LBT mechanism on the remaining carriers, if there are some carriers on each carrier before the transmission starts If the corresponding LBT process is not completed, if the last or last consecutive CCAs on the carrier that has not completed the LBT process detect that the channel is idle, it is determined that the right to use the carrier that successfully completes the LBT process is obtained; or, fifteenth Decision subunit, set to be selected in the carrier set Performing the specified LBT Cat4 mechanism on multiple carriers, and performing a fast LBT mechanism on the remaining carriers, if the random backoff value N of the corresponding LBT process on one carrier satisfies a certain threshold, the remaining carrier The respective LBT processes are stopped, and the LBT Cat2 mechanism is immediately executed; if each carrier completes the corresponding LBT process before the transmission starts, it is determined that the right to use the carrier that successfully completes the LBT process is obtained; or, the sixteenth determining subunit, setting To perform the specified LBT Cat4 mechanism on multiple carriers selected in the carrier set, if the
  • the carrier of the LBT process is still not completed at the transmission start time, it is determined that the current random backoff value N on the carrier satisfies the specific threshold. If the value or the last or last consecutive CCA detection channels are idle, it is determined that the carrier that successfully completes the LBT process is obtained. Or; the seventeenth determining subunit, configured to perform the specified LBT Cat4 mechanism on the selected plurality of carriers in the carrier set, and if the fast LBT mechanism is performed on the remaining carriers, if each carrier is followed The respective LBT mechanisms perform contention access of the channel.
  • the transmission device determines that the right to use the carrier that successfully completes the LBT process is obtained; or, the eighteenth determining subunit , configured to perform a specified LBT Cat4 mechanism on multiple carriers selected in the carrier set, and perform a fast LBT mechanism on the remaining carriers, if each carrier performs contention access of the channel according to the respective LBT mechanism If the LBT process is not completed on the carrier before the start of the transmission time, if the current random backoff value N on each carrier satisfies the preset threshold, or the last or last consecutive CCA detection channels are idle, The transmission device determines to obtain the right to use the carrier that successfully completes the LBT process; or, the nineteenth determination subunit, is set to be in the carrier If the specified LBT Cat4 mechanism is implemented on multiple carriers selected in the middle, and the fast LBT mechanism is executed on the remaining carriers, if the random backoff value N on the carrier satisfies the first threshold, then the other The random backoff value
  • the device further includes: a first execution module, configured to execute the processing flow according to a preset manner, if the LBT mechanism competes for the carrier that fails to access the channel, or the data packet to be transmitted on the carrier, according to the first listening
  • the preset mode includes one of: abandoning the carrier that fails to perform the LBT, or abandoning the transmission on the carrier; retransmitting the data packet on the carrier that performs the LBT failure; and the candidate resource on the carrier that successfully competes; Transmitting a data packet; using an alternate unlicensed carrier; multiplexing the same resource on the other carrier to transmit the respective data packet; wherein different data is sent on the same resource, and if the rank indicating RI is greater than 2, the resource may be multiplexed
  • the transmission is performed, or different data blocks are transmitted on the same resource by random access wireless network temporary identification RNTI or cyclic shift CS coding.
  • FIG. 3 is a structural block diagram of a multi-carrier contention access system according to an embodiment of the present invention. As shown in FIG. 3, the method includes: a base station and a terminal, the base station and the terminal are in communication connection, wherein
  • the terminal is another multi-carrier contention access device as shown in FIG. 2.
  • each of the above modules may be implemented by software or hardware.
  • the foregoing may be implemented by, but not limited to, the foregoing modules are all located in the same processor; or, the modules are located in multiple In the processor.
  • Embodiments of the present invention also provide a storage medium.
  • the storage medium may be configured to store program code set to perform the following steps:
  • the storage medium is further arranged to store program code arranged to perform the following steps:
  • performing the contention access of the channel according to the same listening and speaking LBT mechanism on each carrier in the carrier set includes: the user equipment UE follows each carrier.
  • the specified listener first listens to the LBT mechanism for channel access.
  • the specified LBT mechanism includes one of the following: the LBT Cat2 mechanism; the enhanced LBT Cat2 mechanism; the configuration is set to perform the LBT process for a long time but The LBT Cat4 mechanism with a small random backoff value of N; a fast first listener to say the LBT mechanism; among them, the fast first listener says that the LBT mechanism includes one of the following: delay + extended clean channel evaluation defer period + ECCA process, or Directly expand the clean channel assessment ECCA process.
  • the foregoing storage medium may include, but not limited to, a USB flash drive, a Read-Only Memory (ROM), a Random Access Memory (RAM), a mobile hard disk, and a magnetic memory.
  • ROM Read-Only Memory
  • RAM Random Access Memory
  • a mobile hard disk e.g., a hard disk
  • magnetic memory e.g., a hard disk
  • the processor executes, according to the stored program code in the storage medium, the LBT according to the LBT Cat2 mechanism in the specified carrier listening mechanism.
  • the usage rights of the acquisition channel include: performing competition access of the channel according to the LBT Cat2 mechanism on each carrier, and determining that the LBT Cat2 mechanism is successfully completed for the carrier that successfully completes the LBT Cat2 mechanism.
  • the preset manner includes: determining that the transmission device does not acquire the use right of the carrier; or randomly selecting the carrier to satisfy the specific carrier quantity in the carrier that fails to perform the LBT Cat2 mechanism; or, directly evaluating On the carrier that fails to implement the LBT Cat2 mechanism, the transmission device acquires the right to use the carrier; if the LBT Cat2 is successfully executed The total number of the carrier system to meet specific number of carriers, the transmission equipment used or considered to obtain the right to use the carrier to complete the LBT Cat2 mechanism success.
  • the processor performing the LBT Cat2 mechanism successfully according to the stored program code in the storage medium includes: if the channel is detected from busy to idle, and detecting that the channel is continuously idle for a time greater than and/or equal to Determining the idle channel to estimate the CCA detection duration, or detecting that the channel is continuously idle for more than and/or equal to the preset idle channel assessment CCA detection duration, determining that the transmission device acquires the use right of the unlicensed carrier, or completing the LBT Cat2 process .
  • the processor performs, according to the stored program code in the storage medium, an LBT Cat2 mechanism in which the specified listening mechanism is enhanced, and the detection start position of the CCA detection duration of the idle channel is included.
  • the contention access of the channel according to the specified LBT mechanism is performed on each carrier, including: common fixation on each carrier.
  • the CCA detects the starting position for the contention access of the channel; or, on each carrier, performs the contention access of the channel according to the independent fixed CCA detection starting position; or, according to the common random selection on each carrier
  • the CCA detects the starting position for the contention access of the channel; or, the competing access of the channel is performed on each carrier according to an independently randomly selected CCA detection starting position.
  • the processor performs, according to the stored program code in the storage medium, when the detection start position of the CCA is a fixed CCA detection start position, the contention time zone is divided into K CCAs in advance.
  • the processor executes different fixed CCA detection starting points of different transmission devices in different time periods according to the stored program codes in the storage medium; or, different transmission devices are in K different time segments. There is the same fixed CCA detection starting point.
  • the processor performs, according to the stored program code in the storage medium, when the detection start position of the CCA is a random CCA detection start position, the contention time zone is divided into K CCAs in advance. a detection period; the transmission device randomly selects a starting point of each CCA detection period as a starting point of the CCA detection on the K CCA detection period; or, the transmission device randomly selects a respective CCA detection starting point in the contention access time region; or The transmission device randomly selects respective CCA detection time periods in the K CCA detection time periods and randomly selects the CCA detection start point in the CCA detection time period; or, the transmission device fixes one CCA detection time period on the K CCA detection time periods. And randomly select the CCA detection starting point within the CCA detection time period.
  • the processor performs, according to the stored program code in the storage medium, if the detection channel is from busy to idle, and continuously detects that the channel idle time is greater than and/or equal to the CCA detection duration, or the detection channel is continuous. If the idle time is greater than and/or equal to the preset idle channel evaluation CCA detection duration, it is determined that the transmission device acquires the use right of the unlicensed carrier, or completes the enhanced LBT Cat2 process.
  • the processor executes, according to the stored program code in the storage medium, the LBT mechanism after the specified first listening and the LBT mechanism are fast, and then on each carrier.
  • the LBT mechanism is used to perform the contention access of the channel, and the carrier that successfully completes the LBT process is determined according to the fast listening first and then the LBT mechanism completes the contention access of the channel.
  • the transmission device determines that the successful completion of the fast listening After that, the carrier usage right of the LBT process is said; or, on the carrier that does not complete the fast listening first and then the LBT mechanism, the transmission device considers that the carrier is not available, or, for the carrier that does not complete the fast first listening and then the LBT mechanism, if If the random backoff value N satisfies a specific threshold, the transmission device determines that the carrier usage right of the LBT process is successfully completed after the fast completion of the first hearing; if the random backoff value N does not satisfy the specific Threshold value, it is judged not acquired the right to use the carrier, the carrier or give up; or on each carrier in accordance with the listen before talk fast competitive LBT mechanism for implementing channel Access, if the last time or the last consecutive CCA detects that the channel is idle, the transmission
  • the processor performs, according to the stored program code in the storage medium, in a self-carrier scheduling mode, when the base station performs the contention access of the channel according to the LBT Cat4 mechanism on each carrier, Performing the contention access of the channel according to different listener LBT mechanisms on each carrier in the set of carriers includes performing the LBT Cat2 mechanism on the selected one or more carriers on other carriers in the carrier set The LBT mechanism is not implemented; the fast LBT mechanism is performed on the selected one or more carriers, the LBT mechanism is not performed on other carriers in the carrier set; the fast LBT mechanism is performed on the selected one or more carriers When the fast LBT procedure is to be completed on one or more carriers, the LBT Cat2 mechanism is performed on other carriers in the carrier set.
  • the processor performs LBT on other carriers in the carrier set when the fast LBT mechanism is to be completed on the selected one or more carriers according to the stored program code in the storage medium.
  • the Cat2 mechanism includes: when the random backoff value N in the fast LBT process performed on one carrier is decremented to a specific threshold, the other carriers in the carrier set start to perform the LBT Cat2 mechanism; or, when performing on each of the multiple carriers When the random backoff value N in the fast LBT process is decremented to a certain threshold, the other carriers in the carrier set begin to implement the LBT Cat2 mechanism; wherein the N value is first decremented to a specific threshold and the carrier can perform self-delay Operation; or, when a fast LBT process is performed on multiple carriers while detecting that the channel is idle, the random backoff value N on each carrier is decremented, and when the value of N is decremented to a specific threshold, the other in the carrier set The carrier begins to implement the LBT Cat2 mechanism.
  • the processor executes, according to the stored program code in the storage medium, that the preset scheduling mode is the self-carrier scheduling mode, and the LBT Cat4 mechanism is used on the primary carrier selected by the base station, and the secondary carrier is used.
  • performing the contention access of the channel according to the second preset condition in the carrier set includes: performing the LBT Cat2 mechanism on the primary carrier indicated by the base station, indicating at the base station side Performing a simplified LBT Cat4 or fast LBT mechanism on the secondary carrier; or performing an LBT Cat2 mechanism on each carrier in the set of carriers; or performing configuration on each carrier in the set of carriers for performing the LBT procedure Long time but random backoff value N is relatively small LBT Cat4 or fast LBT mechanism; or, on the base station performing LBT Cat4 carrier, does not perform LBT mechanism, on the base station performs LBT Cat2 carrier, performs configuration for LBT Cat4 that performs a long LBT process but has a relatively small random backoff value N or performs a fast LBT process; or, if the base station performs LBT successful carrier, if the downlink transmits burst and If the gap Gap between the uplink transmission bursts is less than a preset value
  • the processor executes, according to the stored program code in the storage medium, that the preset scheduling mode is the cross-carrier scheduling mode, and the channel is matched according to the second preset condition in the carrier set.
  • the preset scheduling mode is the cross-carrier scheduling mode
  • the channel is matched according to the second preset condition in the carrier set.
  • the mechanism has a small competition window with a random backoff LBT process; or, a fast LBT mechanism is performed on each carrier in the carrier set; wherein: the fast LBT mechanism includes: defer period+ECCA or direct ECCA process; or Selected one in the carrier set Performing the LBT Cat2 mechanism on the remaining carriers when the specified LBT Cat4 mechanism is to be successful on multiple carriers; or performing a specific
  • the processor determines to obtain the channel usage, if the specified LBT Cat4 mechanism or the fast LBT mechanism is performed on each carrier in the carrier set according to the stored program code in the storage medium.
  • the right includes: determining that the right to successfully complete the carrier of the specified LBT Cat4 mechanism or the fast LBT mechanism is obtained in the case that the specified LBT Cat4 mechanism or the fast LBT mechanism is completed on each carrier in the carrier set; or In the carrier set, the carrier of the specified LBT Cat4 mechanism or the fast LBT mechanism is about to be completed. If the current random backoff value N satisfies the preset threshold, then other specified LBT Cat4 mechanisms are being executed or fast.
  • the LBT process on the carrier of the LBT mechanism immediately executes the LBT Cat2 mechanism; in the case where the carrier corresponding to the LBT process is completed on each carrier, the transmission device determines the right to use the carrier that successfully completes the LBT process; or, The specified LBT Cat4 mechanism or fast LBT mechanism is completed on some carriers in the carrier set, and the specified LBT Cat4 process or fast LBT machine is not completed.
  • the transmission device determines the right to use the acquired carrier.
  • the processor performs, according to the stored program code in the storage medium, performing the specified LBT on the selected one or more carriers in the carrier set.
  • the Cat4 mechanism is about to succeed, on the remaining carriers.
  • determining the acquisition channel usage rights includes: performing the specified LBT on the selected one of the carrier sets.
  • the LBT Cat2 mechanism is performed on the remaining carriers, on each carrier.
  • each of the corresponding LBT processes is completed, it is determined that the right to use the carrier that successfully completes the LBT process is obtained; or, when the specified LBT is performed on the selected plurality of carriers in the carrier set, the Cat4 mechanism is about to succeed at the same time, and the remaining The LBT Cat2 mechanism is implemented on the carrier, and when the respective LBT processes are completed on each carrier, it is determined that the right to use the carrier that successfully completes the LBT process is obtained; or, the specified one is performed on the selected multiple carriers in the carrier set.
  • LBT Cat4 mechanism if there is at least one carrier to complete the specified LBT Cat4 mechanism, execute the LBT Cat2 machine on the remaining carriers When the LBT are completed on each carrier corresponding to the respective process, it is determined to obtain the right to use the process successfully completed LBT carriers.
  • the processor performs a specific LBT Cat4 mechanism on the selected one or more carriers in the carrier set according to the stored program code in the storage medium, and performs fast LBT on the remaining carriers.
  • determining the acquisition channel usage rights includes: performing a specified LBT Cat4 mechanism on a selected carrier in the carrier set, and performing a fast LBT mechanism on the remaining carriers, if the transmission starts on each carrier Before the corresponding LBT process is completed, it is determined that the right to use the carrier that successfully completes the LBT process is obtained; or, the specified LBT Cat4 mechanism is executed on the selected carrier in the carrier set, and the fast LBT mechanism is executed on the remaining carriers.
  • the determination is performed.
  • the corresponding LBT process is not completed on some carriers before the transmission starts, If the last or last consecutive CCAs on the carrier that has not completed the LBT process detect that the channel is idle, it is determined that the right to use the carrier that successfully completes the LBT process is obtained; or, the selected multiple carriers in the carrier set If the specified LBT Cat4 mechanism is executed and the fast LBT mechanism is executed on the remaining carriers, if the random backoff value N of the corresponding LBT process on one carrier satisfies a specific threshold, the remaining carriers are stopped.
  • the LBT process immediately executes the LBT Cat2 mechanism; if each carrier completes the corresponding LBT process before the transmission starts, it determines whether the right to use the carrier that successfully completes the LBT process is obtained; or, on the selected plurality of carriers in the carrier set Execute the specified LBT Cat4 mechanism. If the fast LBT mechanism is implemented on the remaining carriers, if the carrier completes the corresponding LBT process before the transmission starts, the reserved signal may be sent or the self-delay operation may be performed; The carrier of the corresponding LBT process continues to perform CCA detection. If the carrier of the LBT process is still not completed at the beginning of the transmission, the carrier is determined.
  • the transmission device determines to obtain the right to use the carrier that successfully completes the LBT process; or, performs the specified LBT Cat4 mechanism on the selected multiple carriers in the carrier set, and performs fast LBT on the remaining carriers.
  • the transmission device determines that the acquisition is successful.
  • the right to use the carrier of the LBT process is completed; or, the specified LBT Cat4 mechanism is performed on multiple carriers selected in the carrier set, and if a fast LBT mechanism is performed on the remaining carriers, if there is a random back on the carrier
  • the random backoff value N on the other carriers is adjusted to the first threshold; if the random backoff value N on the carrier after adjusting the random backoff value N satisfies the second threshold
  • the random backoff value N on the other carriers is adjusted to the second threshold value, and so on, if the random backoff value N is decremented to 0 or the carrier corresponding to the LBT process is completed before the start of the transmission start time, Or, if the LBT process is not completed on the carrier before the start of the transmission time, if the current random backoff value N on the carrier satisfies the preset threshold value, or the last or last consecutive CCA detection channels are idle, Then, the transmission device determines that the right to use
  • the processor executes, according to the stored program code in the storage medium, the carrier that fails to compete for the access channel according to the LBT mechanism after listening, or the data packet to be transmitted on the carrier.
  • the processing flow is executed according to a preset manner.
  • the preset manner includes one of: abandoning the carrier that fails to perform the LBT, or abandoning the transmission on the carrier; retransmitting the data packet on the carrier that fails to perform the LBT; successfully succeeding in the competition Transporting data packets on alternate resources on the carrier; using alternate unlicensed carriers; multiplexing the same resources on other carriers to transmit respective data packets; wherein different data is sent on the same resource, if the rank indication RI is greater than 2.
  • the resource may be multiplexed for transmission, or different data blocks may be transmitted on the same resource by random access wireless network temporary identification RNTI or cyclic shift CS coding.
  • modules or steps of the present invention described above can be implemented by a general-purpose computing device that can be centralized on a single computing device or distributed across a network of multiple computing devices.
  • they may be implemented by program code executable by a computing device such that they may be stored in a storage device by a computing device and, in some cases, may be executed in a different order than herein.
  • the steps shown or described are either made separately into individual integrated circuit modules, or a plurality of modules or steps are fabricated as a single integrated circuit module.
  • the invention is not limited to any specific combination of hardware and software.
  • the multi-carrier contention access method, apparatus, and system provided by the embodiments of the present invention have the following beneficial effects: improving the uplink data transmission performance in a high-load operation state.

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Abstract

本发明提供了一种多载波的竞争接入方法、装置及系统,该方法包括:依据第一预设条件获取执行先听后说LBT机制的载波集合;根据预设的调度方式,在载波集合中依据第二预设条件执行信道的竞争接入。解决相关技术中由于缺少上行多载波的LBT竞争接入方法,导致上行数据传输性能在高负载的运行状态差的问题,进而达到了提升上行数据传输性能在高负载的运行状态的效果。

Description

多载波的竞争接入方法、装置及系统 技术领域
本发明涉及通信领域,具体而言,涉及一种多载波的竞争接入方法、装置及系统。
背景技术
随着数据业务的快速增长,授权频谱的载波上承受的数据传输压力也越来越大,因此,通过非授权频谱的载波来分担授权载波中的数据流量成为后续长期演进(Long Term Evolution,简称LTE)发展的一个重要的演进方向。
非授权频谱具有的特征是:非授权频谱不需要购买,频谱资源零成本,具有免费/低费用的特征;个人、企业都可以参与部署,设备商的设备可以任意部署,具有准入要求低,成本低的特征;非授权频谱中的5GHz、2.4GHz等频段都可以使用,具有可用带宽大的特征;非授权载波具有共享资源的特征,即多个不同系统都在其中运营时或者同一系统的不同运营商在其中运营时,可以考虑一些共享资源的方式提高频谱利用效率,等等。
除了LTE系统非授权载波所带来的各种益处外,本地分配地址(Locally Assigned Address,简称LAA)系统不得不面对的一个重要的挑战是:LTE LAA和其他技术,如无线保真(WIreless-FIdelity,简称Wi-Fi)间的公平共存问题。此外,对于非授权频谱的接入,一些地区的管制要求在开始传输之前需要执行先听后说(Listen Before Talk,简称LBT)机制,因此,LAA设备,如演进型基站(evolved Node B,简称eNB)和/或用户设备(User Equipment,简称UE)需要遵守LBT管制要求,从而达到与Wi-Fi系统的友好共存。
进一步地,随着R13 LAA SI阶段对非授权频谱上的LTE(LTE-U,LTE Advanced in Unlicensed Spectrums)议题的深入研究,最终在WI阶段的第一次会议(3GPP RAN1 #82)中,对于UE在上行开始传输之前是否需要执行LBT机制达成了共识。即绝大多数公司认为UE在开始传输数据之前需要执行LBT机制,为了规避或降低隐藏节点问题,从而提升上行系统性能。此外,在WI阶段对于上行,采用单载波时,有一些工作假设:自调度情况,上行可采用LBT Cat2机制,或者,LBT Cat4机制,且最大竞争窗值应该从集合{3,4,5,6,7}中选择,延迟期defer period是由16us加上一个slot时间;跨载波调度情况与之不同之处在于,当采用LBT Cat4机制时,最大竞争窗值应该比下行LBT Cat4的竞争窗值小,但大于自调度情况的竞争窗。截至目前未知,依然没有达成共识。即便上述讨论最终达成共识,但对于上行在高负载情况下,仅使用一个载波来完成如此大的业务量是很难的,或者说,当在一个载波上因干扰或是碰撞严重而无法继续进行数据的传输时,设备就需要再切换到另一个载波上, 这个过程在一定程度上会导致极大的时延,以及仍需要在执行LBT过程才能使用该载波,从而导致上行性能在高负载情况很差。
针对相关技术中由于缺少上行多载波的LBT竞争接入方法,导致上行数据传输性能在高负载的运行状态差的问题,目前尚未有具体的解决方案。
发明内容
本发明实施例提供了一种多载波的竞争接入方法、装置及系统,以至少解决相关技术中由于缺少上行多载波的LBT竞争接入方法,导致上行数据传输性能在高负载的运行状态差的问题。
根据本发明实施例的一个方面,提供了一种多载波的竞争接入方法,包括:依据第一预设条件获取执行先听后说LBT机制的载波集合;根据预设的调度方式,在载波集合中依据第二预设条件执行信道的竞争接入。
进一步地,第一预设条件包括:基站指示;或者,基站指示和用户设备UE选择结合;或者,用户设备UE自主选择;或者,预定义。
进一步地,预设的调度方式包括:自载波调度方式,或,跨载波调度方式。
进一步地,第二预设条件包括:在载波集合中的每个载波上按照相同的先听后说LBT机制执行信道的竞争接入;或,在载波集合中的每个载波上按照不同的先听后说LBT机制执行信道的竞争接入。
进一步地,在调度方式为自载波调度方式的情况下,在载波集合中的每个载波上按照相同的先听后说LBT机制执行信道的竞争接入包括:用户设备UE在每个载波上均按照指定的先听后说LBT机制进行信道的竞争接入;指定的先听后说LBT机制包括以下之一:LBT Cat2机制;增强型的LBT Cat2机制;配置的用于执行LBT过程的时间长但随机回退值N小的LBTCat4机制;快速的先听后说LBT机制;其中,快速的先听后说LBT机制包括以下之一:延时期+扩展干净信道评估defer period+ECCA过程,或,直接扩展干净信道评估ECCA过程。
进一步地,当下行传输burst和上行传输burst之间的间隙Gap时长小于或等于预设的门限值时,用户设备选择是否执行上行LBT机制或执行LBT Cat2机制。
进一步地,在指定的先听后说机制为LBT Cat2机制的情况下,在载波集合中的每个载波上按照的LBT Cat2机制进行信道的竞争接入时,获取信道的使用权包括:在每个载波上按照LBT Cat2机制执行信道的竞争接入,对于成功完成LBT Cat2机制的载波,判定获取到成功完成LBT Cat2机制载波的使用权;或者,在K个载波中有S个载波上执行LBT Cat2机制成功,在剩余载波上执行LBT Cat2机制失败时,若成功执行LBT Cat2机制的载波总数不满足特定的载波数量,则按照预设方式处理;其中,预设方式包括:判定传输设备未获取到载波的使 用权;或,在执行LBT Cat2机制失败的载波中随机选择载波来满足特定的载波数量;或,直接评定在执行LBT Cat2机制失败的载波上,传输设备获取到载波的使用权;若成功执行LBT Cat2机制的载波总数满足特定的载波数量,则传输设备使用或认为获取到成功完成LBT Cat2机制载波的使用权。
进一步地,成功执行LBT Cat2机制包括:若检测到信道从忙到闲,且检测信道连续空闲的时间大于和/或等于预设空闲信道评估CCA检测时长,或者,检测信道连续空闲的时间大于和/或等于预设空闲信道评估CCA检测时长,则判定传输设备获取到非授权载波的使用权,或,完成LBT Cat2过程。
进一步地,在指定的先听后说机制为增强型的LBT Cat2机制,空闲信道评估CCA检测时长的检测起始位置包括固定CCA检测起始位置或随机选择CCA检测起始位置的情况下,在每个载波上均按照指定的先听后说LBT机制进行信道的竞争接入包括:在每个载波上按照共同的固定的CCA检测起始位置进行信道的竞争接入;或,在每个载波上按照独立的固定的CCA检测起始位置进行信道的竞争接入;或,在每个载波上按照共同的随机选择的CCA检测起始位置进行信道的竞争接入;或,在每个载波上按照独立的随机选择的CCA检测起始位置进行信道的竞争接入。
进一步地,当CCA的检测起始位置为固定CCA检测起始位置时,预先将竞争接入时间区域划分为K个CCA检测时间段;在K个CCA检测时间段上,各个传输设备固定的从K个不同的时间段的一个固定的起点开始进行CCA检测。
进一步地,不同传输设备在K个不同时间段上有不同的固定CCA检测起点;或者,不同传输设备在K个不同时间段上有相同的固定CCA检测起点。
进一步地,当CCA的检测起始位置为随机CCA检测起始位置时,预先将竞争接入时间区域划分为K个CCA检测时间段;在K个CCA检测时间段上传输设备随机选择各自的CCA检测时间段的起点作为CCA检测的起点;或者,传输设备在竞争接入时间区域上随机选择各自的CCA检测起点;或者,传输设备在K个CCA检测时间段上随机选择各自的CCA检测时间段且在CCA检测时间段内随机选择CCA检测起点;或者,传输设备在K个CCA检测时间段上固定一个CCA检测时间段,且在CCA检测时间段内随机选择CCA检测起点。
进一步地,若传输设备检测信道从忙到闲,且连续检测信道空闲时间大于和/或等于CCA检测时长,或者,检测信道连续空闲的时间大于和/或等于预设空闲信道评估CCA检测时长,则判定传输设备获取到非授权载波的使用权,或,完成增强型的LBT Cat2过程。
进一步地,在指定的先听后说LBT机制为快速的先听后说LBT机制的情况下,在每个载波上均按照指定的先听后说LBT机制进行信道的竞争接入包括:在每个载波上按照快速的先听后说LBT机制完成信道的竞争接入的情况下,判定获取到成功完成LBT过程的载波使用权;或者,在每个载波上按照快速的先听后说LBT机制执行信道的竞争接入,成功完成快速的先听后说LBT机制的载波,传输设备判定获取到成功完成快速的先听后说LBT过程的载波使用 权;或者,未完成快速的先听后说LBT机制的载波上,传输设备认为该载波不可用,或者,对于未完成快速的先听后说LBT机制的载波,若随机回退值N满足特定的门限值,则传输设备判定获取到成功完成快速的先听后说LBT过程的载波使用权;若随机回退值N不满足特定的门限值,则判定未获取到该载波使用权,或放弃载波;或者,在每个载波上按照快速的先听后说LBT机制执行信道的竞争接入,若最后一次或最后连续若干次CCA检测到信道空闲,则传输设备判定获取到成功完成快速的先听后说LBT过程的载波使用权;或者,若存在一个即将完成快速的先听后说LBT机制的载波,其他载波上则停止当前的LBT过程,立刻按照LBT Cat2机制执行信道的竞争接入,在开始传输时刻之前完成对应的LBT过程的载波,则传输设备判定获取到载波使用权。
进一步地,在自载波调度方式下,在基站在每个载波上按照LBT Cat4机制执行信道的竞争接入的情况下,在载波集合中的每个载波上按照不同的先听后说LBT机制执行信道的竞争接入包括:在选定的一个或是多个载波上执行LBT Cat2机制,在载波集合中的其他载波上不执行LBT机制;在选定的一个或是多个载波上执行快速LBT机制,在载波集合中的其他载波上不执行LBT机制;在选定的一个或是多个载波上执行快速的LBT机制,在一个或多个载波上即将完成快速LBT过程时,在载波集合中的其他载波上执行LBT Cat2机制。
进一步地,在选定的一个或多个载波上即将完成快速的LBT机制时,在载波集合中的其他载波上执行LBT Cat2机制包括:当一个载波上执行快速的LBT过程中的随机回退值N均递减到特定门限值时,载波集合中的其他载波开始执行LBT Cat2机制;或,当多个载波上各自执行快速的LBT过程中的随机回退值N均递减到特定门限值时,载波集合中的其他载波开始执行LBT Cat2机制;其中,N值先递减到特定门限值的载波上可执行自延迟操作;或,当多个载波上执行快速的LBT过程同时检测到信道空闲时,各个载波上的随机回退值N进行递减操作,且N值递减到特定门限值时,载波集合中的其他载波开始执行LBT Cat2机制。
进一步地,在预设的调度方式为自载波调度方式下,在基站选定的主载波上按照LBT Cat4机制,辅载波上按照LBT Cat2机制进行信道的竞争接入的情况下,在载波集合中依据第二预设条件执行信道的竞争接入包括:在基站指示的主载波上执行LBT Cat2机制,在基站侧指示的辅载波上执行简化的LBT Cat4或快速的LBT机制;或,在载波集合中的每个载波上均执行LBT Cat2机制;或,在载波集合中的每个载波上执行配置的用于执行LBT过程的时间长但随机回退值N相对小的LBT Cat4或快速的LBT机制;或,在基站执行LBT Cat4的载波上,不执行LBT机制,在基站执行LBT Cat2的载波上,执行配置的用于执行LBT过程的时间长但随机回退值N相对小的LBT Cat4或执行快速LBT过程;或,在基站执行LBT成功的载波上,若下行传输burst和上行传输burst之间的间隙Gap小于预设值,则不执行LBT机制,或,执行LBT Cat2机制。
进一步地,在预设的调度方式为跨载波调度方式下,在载波集合中依据第二预设条件执行信道的竞争接入包括:在载波集合中的每个载波上执行指定的LBT Cat4机制;其中,指定的LBT Cat4机制是指最大竞争窗大小比自载波调度执行LBT Cat4的竞争窗大,且比下行执 行LBT Cat4机制的竞争窗小的有随机回退的LBT过程;或者,在载波集合中的每个载波上执行快速的LBT机制;其中:快速的LBT机制包括:defer period+ECCA或直接ECCA过程;或者,在载波集合中选定的一个或多个载波上执行指定的LBT Cat4机制即将成功时,在剩余的载波上执行LBT Cat2机制;或者,在载波集合中选定的一个或多个载波上执行特定的LBT Cat4机制,剩余的载波上执行快速的LBT机制;或者,在载波集合中选定的一个或多个载波上执行快速的LBT机制,剩余的载波上执行LBT Cat2机制。
进一步地,在载波集合中的每个载波上执行指定的LBT Cat4机制或快速的LBT机制的情况下,确定获取信道使用权包括:在载波集合中的每个载波上均完成指定的LBT Cat4机制或快速的LBT机制的情况下,判定获取到成功完成指定的LBT Cat4机制或快速的LBT机制的载波的使用权;或,在载波集合中,即将完成指定的LBT Cat4机制或快速的LBT机制的载波,若当前随机回退值值N满足预设的门限值时,则停止其他正在执行指定的LBT Cat4机制或快速的LBT机制的载波上的LBT过程,立刻执行LBT Cat2机制;在每个载波上完成对应LBT过程的载波的情况下,则传输设备判定获取到成功完成LBT过程的载波的使用权;或,在载波集合中部分载波上完成指定的LBT Cat4机制或快速的LBT机制,且未完成指定的LBT Cat4过程或快速的LBT机制的载波上当前的随机回退值N满足预设的门限值的情况下,判定获取到成功完成LBT过程的载波的使用权;或,若在开始传输时刻之前未完成指定LBT Cat4过程或快速的LBT机制的载波上的最后一次或最后连续若干次的CCA检测信道空闲,则传输设备判定获取的载波的使用权。
进一步地,在载波集合中选定的一个或多个载波上执行指定的LBT Cat4机制即将成功时,在剩余的载波上执行LBT Cat2机制的情况下,确定获取信道使用权包括:在载波集合中选定的一个载波上执行指定的LBT Cat4机制即将成功时,在剩余的载波上执行LBT Cat2机制,当每个载波上均完成各自对应的LBT过程时,判定获取到成功完成LBT过程的载波的使用权;或者,在载波集合中选定的多个载波上均执行指定的LBT Cat4机制即将同时成功时,在剩余的载波上执行LBT Cat2机制,当每个载波上均完成各自对应的LBT过程时,判定获取到成功完成LBT过程的载波的使用权;或者,在载波集合中选定的多个载波上执行指定的LBT Cat4机制,如果有至少一个载波上即将完成指定的LBT Cat4机制,在剩余的载波上执行LBT Cat2机制,当每个载波上均完成各自对应的LBT过程时,判定获取到成功完成LBT过程的载波的使用权。
进一步地,在载波集合中选定的一个或多个载波上执行特定的LBT Cat4机制,剩余的载波上执行快速的LBT机制的情况下,确定获取信道使用权包括:在载波集合中选定的一个载波上执行指定的LBT Cat4机制,在剩余的载波上执行快速的LBT机制的情况下,若各个载波上在传输开始之前完成对应的LBT过程,则判定获取到成功完成LBT过程的载波的使用权;或者,在载波集合中选定的一个载波上执行指定的LBT Cat4机制,在剩余的载波上执行快速的LBT机制的情况下,若各个载波上在传输开始之前有部分载波上未完成对应的LBT过程,则若未完成LBT过程的载波上的当前随机回退值N满足预设的门限值,则判定获取到成功完成LBT过程的载波的使用权;或者,在载波集合中选定的一个载波上执行指定的LBT Cat4 机制,在剩余的载波上执行快速的LBT机制的情况下,若各个载波上在传输开始之前有部分载波上未完成对应的LBT过程,则若未完成LBT过程的载波上的最后一次或最后连续若干次CCA检测到信道为空闲,则判定获取到成功完成LBT过程的载波的使用权;或者,在载波集合中选定的多个载波上执行指定的LBT Cat4机制,在剩余的载波上执行快速的LBT机制的情况下,若有一个载波上对应的LBT过程的随机回退值N满足特定的门限值,则剩余载波上停止各自的LBT过程,立刻执行LBT Cat2机制;若各个载波在传输开始之前完成对应的LBT过程,则判定获取到成功完成LBT过程的载波的使用权;或者,在载波集合中选定的多个载波上执行指定的LBT Cat4机制,在剩余的载波上执行快速的LBT机制的情况下,若在传输开始之前有载波先完成对应的LBT过程,则可以发送预留信号,或者执行自延迟操作;未完成对应的LBT过程的载波继续执行CCA检测,若在传输开始时刻依然未完成LBT过程的载波,判断载波上当前随机回退值N满足特定的门限值或最后一次或最后连续若干次CCA检测信道为空闲,则判定获取到成功完成LBT过程的载波的使用权;或者,在载波集合中选定的多个载波上执行指定的LBT Cat4机制,在剩余的载波上执行快速的LBT机制的情况下,若各个载波上按照各自的LBT机制进行信道的竞争接入,如果在开始传输时刻之前完成对应的LBT过程的载波上,则传输设备判定获取到成功完成LBT过程的载波的使用权;或者,在载波集合中选定的多个载波上执行指定的LBT Cat4机制,在剩余的载波上执行快速的LBT机制的情况下,若各个载波上按照各自的LBT机制进行信道的竞争接入,如果在开始传输时刻之前载波上未完成LBT过程,则若各载波上当前随机回退值N满足预设的门限值的载波,或者,最后一次或最后连续若干次CCA检测信道为空闲,则传输设备判定获取到成功完成LBT过程的载波的使用权;或者,在载波集合中选定的多个载波上执行指定的LBT Cat4机制,在剩余的载波上执行快速的LBT机制的情况下,若有载波上的随机回退值N满足第一门限值时,则其他载波上的随机回退值N调整到第一门限值;若调整随机回退值N后的载波上的随机回退值N满足第二门限值时,则其他载波上的随机回退值N调整到第二门限值,以此类推,在开始传输时刻开始之前,如果随机回退值N递减到0或完成对应LBT过程的载波,或,如果在开始传输时刻之前载波上未完成LBT过程,则若载波上当前随机回退值N满足预设的门限值的载波,或者,最后一次或最后连续若干次CCA检测信道为空闲,则传输设备判定获取到成功完成LBT过程的载波的使用权。
进一步地,方法还包括:在按照先听后说LBT机制竞争接入信道失败的载波,或,载波上待传输的数据包的情况下,依据预设方式执行处理流程;其中,预设方式包括之一:放弃执行LBT失败的载波,或者,放弃在载波上传输;对执行LBT失败的载波上的数据包进行重传;在竞争成功的载波上的备选的资源上传输数据包;使用备用的非授权载波;复用其他载波上相同资源一起传输各自的数据包;其中,不同数据在同一个资源上发,若秩指示RI大于2,则可以复用该资源进行传输,或是通过随机接入无线网络临时标识RNTI或循环移位CS编码在同一资源上发送不同的数据块。
根据本发明实施例的另一个方面,提供了一种多载波的竞争接入的装置,包括:获取模块,设置为依据第一预设条件获取执行先听后说LBT机制的载波集合;接入模块,设置为根 据预设的调度方式,在载波集合中依据第二预设条件执行信道的竞争接入。
进一步地,第一预设条件包括:基站指示;或者,基站指示和用户设备UE选择结合;或者,用户设备UE自主选择;或者,预定义。
进一步地,预设的调度方式包括:自载波调度方式,或,跨载波调度方式。
进一步地,第二预设条件包括:在载波集合中的每个载波上按照相同的先听后说LBT机制执行信道的竞争接入;或,在载波集合中的每个载波上按照不同的先听后说LBT机制执行信道的竞争接入。
进一步地,接入模块包括:第一接入单元,设置为在调度方式为自载波调度方式的情况下,用户设备UE在每个载波上均按照指定的先听后说LBT机制进行信道的竞争接入;指定的先听后说LBT机制包括以下之一:LBT Cat2机制;增强型的LBT Cat2机制;配置的用于执行LBT过程的时间长但随机回退值N小的LBT Cat4机制;快速的先听后说LBT机制;其中,快速的先听后说LBT机制包括以下之一:延时期+扩展干净信道评估defer period+ECCA过程,或,直接扩展干净信道评估ECCA过程。
进一步地,执行单元,设置为当下行传输burst和上行传输burst之间的间隙Gap时长小于或等于预设的门限值时,选择是否执行上行LBT机制或执行LBT Cat2机制。
进一步地,装置包括:第一判定模块,设置为在指定的先听后说机制为LBT Cat2机制的情况下,在载波集合中的每个载波上按照的LBT Cat2机制进行信道的竞争接入时,在每个载波上按照LBT Cat2机制执行信道的竞争接入,对于成功完成LBT Cat2机制的载波,判定获取到成功完成LBT Cat2机制载波的使用权;或者,第二判定模块,设置为在K个载波中有S个载波上执行LBT Cat2机制成功,在剩余载波上执行LBT Cat2机制失败时,若成功执行LBT Cat2机制的载波总数不满足特定的载波数量,则按照预设方式处理;其中,预设方式包括:判定传输设备未获取到载波的使用权;或,在执行LBT Cat2机制失败的载波中随机选择载波来满足特定的载波数量;或,直接评定在执行LBT Cat2机制失败的载波上,传输设备获取到载波的使用权;若成功执行LBT Cat2机制的载波总数满足特定的载波数量,则传输设备使用或认为获取到成功完成LBT Cat2机制载波的使用权。
进一步地,成功执行LBT Cat2机制包括:若检测到信道从忙到闲,且检测信道连续空闲的时间大于和/或等于预设空闲信道评估CCA检测时长,或者,检测信道连续空闲的时间大于和/或等于预设空闲信道评估CCA检测时长,则判定传输设备获取到非授权载波的使用权,或,完成LBT Cat2过程。
进一步地,第一接入单元包括:第一检测子单元,设置为在指定的先听后说机制为增强型的LBT Cat2机制,空闲信道评估CCA检测时长的检测起始位置包括固定CCA检测起始位置或随机选择CCA检测起始位置的情况下,在每个载波上按照共同的固定的CCA检测起始位置进行信道的竞争接入;或,第二检测子单元,设置为在每个载波上按照独立的固定的CCA 检测起始位置进行信道的竞争接入;或,第三检测子单元,设置为在每个载波上按照共同的随机选择的CCA检测起始位置进行信道的竞争接入;或,第四检测子单元,设置为在每个载波上按照独立的随机选择的CCA检测起始位置进行信道的竞争接入。
进一步地,当CCA的检测起始位置为固定CCA检测起始位置时,预先将竞争接入时间区域划分为K个CCA检测时间段;在K个CCA检测时间段上,各个传输设备固定的从K个不同的时间段的一个固定的起点开始进行CCA检测。
进一步地,不同传输设备在K个不同时间段上有不同的固定CCA检测起点;或者,不同传输设备在K个不同时间段上有相同的固定CCA检测起点。
进一步地,当CCA的检测起始位置为随机CCA检测起始位置时,预先将竞争接入时间区域划分为K个CCA检测时间段;在K个CCA检测时间段上传输设备随机选择各自的CCA检测时间段的起点作为CCA检测的起点;或者,传输设备在竞争接入时间区域上随机选择各自的CCA检测起点;或者,传输设备在K个CCA检测时间段上随机选择各自的CCA检测时间段且在CCA检测时间段内随机选择CCA检测起点;或者,传输设备在K个CCA检测时间段上固定一个CCA检测时间段,且在CCA检测时间段内随机选择CCA检测起点。
进一步地,若传输设备检测信道从忙到闲,且连续检测信道空闲时间大于和/或等于CCA检测时长,或者,检测信道连续空闲的时间大于和/或等于预设空闲信道评估CCA检测时长,则判定传输设备获取到非授权载波的使用权,或,完成增强型的LBT Cat2过程。
进一步地,第一接入单元包括:第一判定子单元,设置为在指定的先听后说LBT机制为快速的先听后说LBT机制的情况下,在每个载波上按照快速的先听后说LBT机制完成信道的竞争接入的情况下,判定获取到成功完成LBT过程的载波使用权;或者,第二判定子单元,设置为在每个载波上按照快速的先听后说LBT机制执行信道的竞争接入,成功完成快速的先听后说LBT机制的载波,传输设备判定获取到成功完成快速的先听后说LBT过程的载波使用权;或者,未完成快速的先听后说LBT机制的载波上,传输设备认为该载波不可用,或者,对于未完成快速的先听后说LBT机制的载波,若随机回退值N满足特定的门限值,则传输设备判定获取到成功完成快速的先听后说LBT过程的载波使用权;若随机回退值N不满足特定的门限值,则判定未获取到该载波使用权,或放弃载波;或者,第三判定子单元,设置为在每个载波上按照快速的先听后说LBT机制执行信道的竞争接入,若最后一次或最后连续若干次CCA检测到信道空闲,则传输设备判定获取到成功完成快速的先听后说LBT过程的载波使用权;或者,第四判定子单元,设置为若存在一个即将完成快速的先听后说LBT机制的载波,其他载波上则停止当前的LBT过程,立刻按照LBT Cat2机制执行信道的竞争接入,在开始传输时刻之前完成对应的LBT过程的载波,则传输设备判定获取到载波使用权。
进一步地,接入模块包括:第一执行单元,设置为在自载波调度方式下,在基站在每个载波上按照LBT Cat4机制执行信道的竞争接入的情况下,在选定的一个或是多个载波上执行LBT Cat2机制,在载波集合中的其他载波上不执行LBT机制;第二执行单元,设置为在选定 的一个或是多个载波上执行快速LBT机制,在载波集合中的其他载波上不执行LBT机制;第三执行单元,设置为在选定的一个或是多个载波上执行快速的LBT机制,在一个或多个载波上即将完成快速LBT过程时,在载波集合中的其他载波上执行LBT Cat2机制。
进一步地,第三执行单元包括:第一执行子单元,设置为当一个载波上执行快速的LBT过程中的随机回退值N均递减到特定门限值时,载波集合中的其他载波开始执行LBT Cat2机制;或,第二执行子单元,设置为当多个载波上各自执行快速的LBT过程中的随机回退值N均递减到特定门限值时,载波集合中的其他载波开始执行LBT Cat2机制;其中,N值先递减到特定门限值的载波上可执行自延迟操作;或,第三执行子单元,设置为当多个载波上执行快速的LBT过程同时检测到信道空闲时,各个载波上的随机回退值N进行递减操作,且N值递减到特定门限值时,载波集合中的其他载波开始执行LBT Cat2机制。
进一步地,接入模块包括:第四执行单元,设置为在预设的调度方式为自载波调度方式下,在基站选定的主载波上按照LBT Cat4机制,辅载波上按照LBT Cat2机制进行信道的竞争接入的情况下,在基站指示的主载波上执行LBT Cat2机制,在基站侧指示的辅载波上执行简化的LBT Cat4或快速的LBT机制;或,第五执行单元,设置为在载波集合中的每个载波上均执行LBT Cat2机制;或,第六执行单元,设置为在载波集合中的每个载波上执行配置的用于执行LBT过程的时间长但随机回退值N相对小的LBT Cat4或快速的LBT机制;或,第七执行单元,设置为在基站执行LBT Cat4的载波上,不执行LBT机制,在基站执行LBT Cat2的载波上,执行配置的用于执行LBT过程的时间长但随机回退值N相对小的LBT Cat4或执行快速LBT过程;或,第八执行单元,设置为在基站执行LBT成功的载波上,若下行传输burst和上行传输burst之间的间隙Gap小于预设值,则不执行LBT机制,或,执行LBT Cat2机制。
进一步地,接入模块包括:第九执行单元,设置为在预设的调度方式为跨载波调度方式下,在载波集合中的每个载波上执行指定的LBT Cat4机制;其中,指定的LBT Cat4机制是指最大竞争窗大小比自载波调度执行LBT Cat4的竞争窗大,且比下行执行LBT Cat4机制的竞争窗小的有随机回退的LBT过程;或者,第十执行单元,设置为在载波集合中的每个载波上执行快速的LBT机制;其中:快速的LBT机制包括:defer period+ECCA或直接ECCA过程;或者,第十一执行单元,设置为在载波集合中选定的一个或多个载波上执行指定的LBT Cat4机制即将成功时,在剩余的载波上执行LBT Cat2机制;或者,第十二执行单元,设置为在载波集合中选定的一个或多个载波上执行特定的LBT Cat4机制,剩余的载波上执行快速的LBT机制;或者,第十三执行单元,设置为在载波集合中选定的一个或多个载波上执行快速的LBT机制,剩余的载波上执行LBT Cat2机制。
进一步地,装置还包括:第五判定子单元,设置为在载波集合中的每个载波上均完成指定的LBT Cat4机制或快速的LBT机制的情况下,判定获取到成功完成指定的LBT Cat4机制或快速的LBT机制的载波的使用权;或,第六判定子单元,设置为在载波集合中,即将完成指定的LBT Cat4机制或快速的LBT机制的载波,若当前随机回退值值N满足预设的门限值 时,则停止其他正在执行指定的LBT Cat4机制或快速的LBT机制的载波上的LBT过程,立刻执行LBT Cat2机制;在每个载波上完成对应LBT过程的载波的情况下,则传输设备判定获取到成功完成LBT过程的载波的使用权;或,第七判定子单元,设置为在载波集合中部分载波上完成指定的LBT Cat4机制或快速的LBT机制,且未完成指定的LBT Cat4过程或快速的LBT机制的载波上当前的随机回退值N满足预设的门限值的情况下,判定获取到成功完成LBT过程的载波的使用权;或,第八判定子单元,设置为若在开始传输时刻之前未完成指定LBT Cat4过程或快速的LBT机制的载波上的最后一次或最后连续若干次的CCA检测信道空闲,则传输设备判定获取的载波的使用权。
进一步地,第十一执行单元包括:第九判定子单元,设置为在载波集合中选定的一个载波上执行指定的LBT Cat4机制即将成功时,在剩余的载波上执行LBT Cat2机制,当每个载波上均完成各自对应的LBT过程时,判定获取到成功完成LBT过程的载波的使用权;或者,第十判定子单元,设置为在载波集合中选定的多个载波上均执行指定的LBT Cat4机制即将同时成功时,在剩余的载波上执行LBT Cat2机制,当每个载波上均完成各自对应的LBT过程时,判定获取到成功完成LBT过程的载波的使用权;或者,第十一判定子单元,设置为在载波集合中选定的多个载波上执行指定的LBT Cat4机制,如果有至少一个载波上即将完成指定的LBT Cat4机制,在剩余的载波上执行LBT Cat2机制,当每个载波上均完成各自对应的LBT过程时,判定获取到成功完成LBT过程的载波的使用权。
进一步地,第十二执行单元包括:第十二判定子单元,设置为在载波集合中选定的一个载波上执行指定的LBT Cat4机制,在剩余的载波上执行快速的LBT机制的情况下,若各个载波上在传输开始之前完成对应的LBT过程,则判定获取到成功完成LBT过程的载波的使用权;或者,第十三判定子单元,设置为在载波集合中选定的一个载波上执行指定的LBT Cat4机制,在剩余的载波上执行快速的LBT机制的情况下,若各个载波上在传输开始之前有部分载波上未完成对应的LBT过程,则若未完成LBT过程的载波上的当前随机回退值N满足预设的门限值,则判定获取到成功完成LBT过程的载波的使用权;或者,第十四判定子单元,设置为在载波集合中选定的一个载波上执行指定的LBT Cat4机制,在剩余的载波上执行快速的LBT机制的情况下,若各个载波上在传输开始之前有部分载波上未完成对应的LBT过程,则若未完成LBT过程的载波上的最后一次或最后连续若干次CCA检测到信道为空闲,则判定获取到成功完成LBT过程的载波的使用权;或者,第十五判定子单元,设置为在载波集合中选定的多个载波上执行指定的LBT Cat4机制,在剩余的载波上执行快速的LBT机制的情况下,若有一个载波上对应的LBT过程的随机回退值N满足特定的门限值,则剩余载波上停止各自的LBT过程,立刻执行LBT Cat2机制;若各个载波在传输开始之前完成对应的LBT过程,则判定获取到成功完成LBT过程的载波的使用权;或者,第十六判定子单元,设置为在载波集合中选定的多个载波上执行指定的LBT Cat4机制,在剩余的载波上执行快速的LBT机制的情况下,若在传输开始之前有载波先完成对应的LBT过程,则可以发送预留信号,或者执行自延迟操作;未完成对应的LBT过程的载波继续执行CCA检测,若在传输开始时刻依然未完成LBT过程的载波,判断载波上当前随机回退值N满足特定的门限值或最后一次或最后连续若 干次CCA检测信道为空闲,则判定获取到成功完成LBT过程的载波的使用权;或者,第十七判定子单元,设置为在载波集合中选定的多个载波上执行指定的LBT Cat4机制,在剩余的载波上执行快速的LBT机制的情况下,若各个载波上按照各自的LBT机制进行信道的竞争接入,如果在开始传输时刻之前完成对应的LBT过程的载波上,则传输设备判定获取到成功完成LBT过程的载波的使用权;或者,第十八判定子单元,设置为在载波集合中选定的多个载波上执行指定的LBT Cat4机制,在剩余的载波上执行快速的LBT机制的情况下,若各个载波上按照各自的LBT机制进行信道的竞争接入,如果在开始传输时刻之前载波上未完成LBT过程,则若各载波上当前随机回退值N满足预设的门限值的载波,或者,最后一次或最后连续若干次CCA检测信道为空闲,则传输设备判定获取到成功完成LBT过程的载波的使用权;或者,第十九判定子单元,设置为在载波集合中选定的多个载波上执行指定的LBT Cat4机制,在剩余的载波上执行快速的LBT机制的情况下,若有载波上的随机回退值N满足第一门限值时,则其他载波上的随机回退值N调整到第一门限值;若调整随机回退值N后的载波上的随机回退值N满足第二门限值时,则其他载波上的随机回退值N调整到第二门限值,以此类推,在开始传输时刻开始之前,如果随机回退值N递减到0或完成对应LBT过程的载波,或,如果在开始传输时刻之前载波上未完成LBT过程,则若载波上当前随机回退值N满足预设的门限值的载波,或者,最后一次或最后连续若干次CCA检测信道为空闲,则传输设备判定获取到成功完成LBT过程的载波的使用权。
进一步地,装置还包括:第一执行模块,设置为在按照先听后说LBT机制竞争接入信道失败的载波,或,载波上待传输的数据包的情况下,依据预设方式执行处理流程;其中,预设方式包括之一:放弃执行LBT失败的载波,或者,放弃在载波上传输;对执行LBT失败的载波上的数据包进行重传;在竞争成功的载波上的备选的资源上传输数据包;使用备用的非授权载波;复用其他载波上相同资源一起传输各自的数据包;其中,不同数据在同一个资源上发,若秩指示RI大于2,则可以复用该资源进行传输,或是通过随机接入无线网络临时标识RNTI或循环移位CS编码在同一资源上发送不同的数据块。
根据本发明实施例的又一个方面,提供了一种多载波的竞争接入系统,包括:基站和终端,基站与终端通信连接,其中,终端为上述的多载波的竞争接入装置。
通过本发明,通过依据第一预设条件获取执行先听后说LBT机制的载波集合;根据预设的调度方式,在载波集合中依据第二预设条件执行信道的竞争接入。解决相关技术中由于缺少上行多载波的LBT竞争接入方法,导致上行数据传输性能在高负载的运行状态差的问题,进而达到了提升上行数据传输性能在高负载的运行状态的效果。
附图说明
此处所说明的附图用来提供对本发明的进一步理解,构成本申请的一部分,本发明的示意性实施例及其说明用于解释本发明,并不构成对本发明的不当限定。在附图中:
图1是根据本发明实施例的多载波的竞争接入方法的流程图;
图2是根据本发明实施例的多载波的竞争接入装置的结构框图;
图3是根据本发明实施例的一种多载波的竞争接入系统的结构框图。
具体实施方式
下文中将参考附图并结合实施例来详细说明本发明。需要说明的是,在不冲突的情况下,本申请中的实施例及实施例中的特征可以相互组合。
需要说明的是,本发明的说明书和权利要求书及上述附图中的术语“第一”、“第二”等是用于区别类似的对象,而不必用于描述指定的顺序或先后次序。
实施例一
在本实施例中提供了一种多载波的竞争接入方法,图1是根据本发明实施例的多载波的竞争接入方法的流程图,如图1所示,该流程包括如下步骤:
步骤S102,依据第一预设条件获取执行先听后说LBT机制的载波集合;
步骤S104,根据预设的调度方式,在载波集合中依据第二预设条件执行信道的竞争接入。
本申请实施例提供的多载波的竞争接入方法,通过依据第一预设条件获取执行先听后说LBT机制的载波集合;根据预设的调度方式,在载波集合中依据第二预设条件执行信道的竞争接入。解决相关技术中由于缺少上行多载波的LBT竞争接入方法,导致上行数据传输性能在高负载的运行状态差的问题,进而达到了提升上行数据传输性能在高负载的运行状态的效果。
进一步地,第一预设条件包括:基站指示;或者,基站指示和用户设备(User Equipment,简称UE)选择结合;或者,用户设备UE自主选择;或者,预定义。
进一步地,预设的调度方式包括:自载波调度方式,或,跨载波调度方式。
进一步地,第二预设条件包括:在载波集合中的每个载波上按照相同的先听后说(Listen Before Talk,简称LBT)机制执行信道的竞争接入;或,在载波集合中的每个载波上按照不同的先听后说LBT机制执行信道的竞争接入。
进一步地,在调度方式为自载波调度方式的情况下,在载波集合中的每个载波上按照相同的先听后说LBT机制执行信道的竞争接入包括:用户设备UE在每个载波上均按照指定的先听后说LBT机制进行信道的竞争接入;
指定的先听后说LBT机制包括以下之一:LBT Cat2机制;增强型的LBT Cat2机制;配 置的用于执行LBT过程的时间长但随机回退值N小的LBT Cat4机制;快速的先听后说LBT机制;
其中,快速的先听后说LBT机制包括以下之一:延时期+扩展干净信道评估(defer period+ECCA,简称defer period+Extended Clear Channel Assessment)过程,或,直接扩展干净信道评估ECCA过程。
进一步地,当下行传输burst和上行传输burst之间的间隙Gap时长小于或等于预设的门限值时,用户设备选择是否执行上行LBT机制或执行LBT Cat2机制。
进一步地,在指定的先听后说机制为LBT Cat2机制的情况下,在载波集合中的每个载波上按照的LBT Cat2机制进行信道的竞争接入时,获取信道的使用权包括:
在每个载波上按照LBT Cat2机制执行信道的竞争接入,对于成功完成LBT Cat2机制的载波,判定获取到成功完成LBT Cat2机制载波的使用权;或者,
在K个载波中有S个载波上执行LBT Cat2机制成功,在剩余载波上执行LBT Cat2机制失败时,若成功执行LBT Cat2机制的载波总数不满足特定的载波数量,则按照预设方式处理;其中,预设方式包括:判定传输设备未获取到载波的使用权;或,在执行LBT Cat2机制失败的载波中随机选择载波来满足特定的载波数量;或,直接评定在执行LBT Cat2机制失败的载波上,传输设备获取到载波的使用权;若成功执行LBT Cat2机制的载波总数满足特定的载波数量,则传输设备使用或认为获取到成功完成LBT Cat2机制载波的使用权。
进一步地,成功执行LBT Cat2机制包括:若检测到信道从忙到闲,且检测信道连续空闲的时间大于和/或等于预设空闲信道评估CCA检测时长,或者,检测信道连续空闲的时间大于和/或等于预设空闲信道评估CCA检测时长,则判定传输设备获取到非授权载波的使用权,或,完成LBT Cat2过程。
进一步地,在指定的先听后说机制为增强型的LBT Cat2机制,空闲信道评估CCA检测时长的检测起始位置包括固定CCA检测起始位置或随机选择CCA检测起始位置的情况下,在每个载波上均按照指定的先听后说LBT机制进行信道的竞争接入包括:
在每个载波上按照共同的固定的CCA检测起始位置进行信道的竞争接入;或,
在每个载波上按照独立的固定的CCA检测起始位置进行信道的竞争接入;或,
在每个载波上按照共同的随机选择的CCA检测起始位置进行信道的竞争接入;或,
在每个载波上按照独立的随机选择的CCA检测起始位置进行信道的竞争接入。
进一步地,当CCA的检测起始位置为固定CCA检测起始位置时,预先将竞争接入时间区域划分为K个CCA检测时间段;在K个CCA检测时间段上,各个传输设备固定的从K个不同的时间段的一个固定的起点开始进行CCA检测。
进一步地,不同传输设备在K个不同时间段上有不同的固定CCA检测起点;或者,不同传输设备在K个不同时间段上有相同的固定CCA检测起点。
进一步地,当CCA的检测起始位置为随机CCA检测起始位置时,预先将竞争接入时间区域划分为K个CCA检测时间段;在K个CCA检测时间段上传输设备随机选择各自的CCA检测时间段的起点作为CCA检测的起点;或者,传输设备在竞争接入时间区域上随机选择各自的CCA检测起点;或者,传输设备在K个CCA检测时间段上随机选择各自的CCA检测时间段且在CCA检测时间段内随机选择CCA检测起点;或者,传输设备在K个CCA检测时间段上固定一个CCA检测时间段,且在CCA检测时间段内随机选择CCA检测起点。
进一步地,若传输设备检测信道从忙到闲,且连续检测信道空闲时间大于和/或等于CCA检测时长,或者,检测信道连续空闲的时间大于和/或等于预设空闲信道评估CCA检测时长,则判定传输设备获取到非授权载波的使用权,或,完成增强型的LBT Cat2过程。
进一步地,在指定的先听后说LBT机制为快速的先听后说LBT机制的情况下,在每个载波上均按照指定的先听后说LBT机制进行信道的竞争接入包括:
在每个载波上按照快速的先听后说LBT机制完成信道的竞争接入的情况下,判定获取到成功完成LBT过程的载波使用权;或者,
在每个载波上按照快速的先听后说LBT机制执行信道的竞争接入,成功完成快速的先听后说LBT机制的载波,传输设备判定获取到成功完成快速的先听后说LBT过程的载波使用权;或者,未完成快速的先听后说LBT机制的载波上,传输设备认为该载波不可用,或者,对于未完成快速的先听后说LBT机制的载波,若随机回退值N满足特定的门限值,则传输设备判定获取到成功完成快速的先听后说LBT过程的载波使用权;若随机回退值N不满足特定的门限值,则判定未获取到该载波使用权,或放弃载波;或者,
在每个载波上按照快速的先听后说LBT机制执行信道的竞争接入,若最后一次或最后连续若干次CCA检测到信道空闲,则传输设备判定获取到成功完成快速的先听后说LBT过程的载波使用权;或者,
若存在一个即将完成快速的先听后说LBT机制的载波,其他载波上则停止当前的LBT过程,立刻按照LBT Cat2机制执行信道的竞争接入,在开始传输时刻之前完成对应的LBT过程的载波,则传输设备判定获取到载波使用权。
进一步地,在自载波调度方式下,在基站在每个载波上按照LBT Cat4机制执行信道的竞争接入的情况下,在载波集合中的每个载波上按照不同的先听后说LBT机制执行信道的竞争接入包括:
在选定的一个或是多个载波上执行LBT Cat2机制,在载波集合中的其他载波上不执行LBT机制;
在选定的一个或是多个载波上执行快速LBT机制,在载波集合中的其他载波上不执行 LBT机制;
在选定的一个或是多个载波上执行快速的LBT机制,在一个或多个载波上即将完成快速LBT过程时,在载波集合中的其他载波上执行LBT Cat2机制。
进一步地,在选定的一个或多个载波上即将完成快速的LBT机制时,在载波集合中的其他载波上执行LBT Cat2机制包括:
当一个载波上执行快速的LBT过程中的随机回退值N均递减到特定门限值时,载波集合中的其他载波开始执行LBT Cat2机制;或,
当多个载波上各自执行快速的LBT过程中的随机回退值N均递减到特定门限值时,载波集合中的其他载波开始执行LBT Cat2机制;其中,N值先递减到特定门限值的载波上可执行自延迟操作;或,
当多个载波上执行快速的LBT过程同时检测到信道空闲时,各个载波上的随机回退值N进行递减操作,且N值递减到特定门限值时,载波集合中的其他载波开始执行LBT Cat2机制。
进一步地,在预设的调度方式为自载波调度方式下,在基站选定的主载波上按照LBT Cat4机制,辅载波上按照LBT Cat2机制进行信道的竞争接入的情况下,在载波集合中依据第二预设条件执行信道的竞争接入包括:
在基站指示的主载波上执行LBT Cat2机制,在基站侧指示的辅载波上执行简化的LBT Cat4或快速的LBT机制;或,
在载波集合中的每个载波上均执行LBT Cat2机制;或,在载波集合中的每个载波上执行配置的用于执行LBT过程的时间长但随机回退值N相对小的LBT Cat4或快速的LBT机制;或,
在基站执行LBT Cat4的载波上,不执行LBT机制,在基站执行LBT Cat2的载波上,执行配置的用于执行LBT过程的时间长但随机回退值N相对小的LBT Cat4或执行快速LBT过程;或,
在基站执行LBT成功的载波上,若下行传输burst和上行传输burst之间的间隙Gap小于预设值,则不执行LBT机制,或,执行LBT Cat2机制。
进一步地,在预设的调度方式为跨载波调度方式下,在载波集合中依据第二预设条件执行信道的竞争接入包括:
在载波集合中的每个载波上执行指定的LBT Cat4机制;其中,指定的LBT Cat4机制是指最大竞争窗大小比自载波调度执行LBT Cat4的竞争窗大,且比下行执行LBT Cat4机制的竞争窗小的有随机回退的LBT过程;或者,
在载波集合中的每个载波上执行快速的LBT机制;其中:快速的LBT机制包括:defer  period+ECCA或直接ECCA过程;或者,
在载波集合中选定的一个或多个载波上执行指定的LBT Cat4机制即将成功时,在剩余的载波上执行LBT Cat2机制;或者,
在载波集合中选定的一个或多个载波上执行特定的LBT Cat4机制,剩余的载波上执行快速的LBT机制;或者,在载波集合中选定的一个或多个载波上执行快速的LBT机制,剩余的载波上执行LBT Cat2机制。
进一步地,在载波集合中的每个载波上执行指定的LBT Cat4机制或快速的LBT机制的情况下,确定获取信道使用权包括:
在载波集合中的每个载波上均完成指定的LBT Cat4机制或快速的LBT机制的情况下,判定获取到成功完成指定的LBT Cat4机制或快速的LBT机制的载波的使用权;或,
在载波集合中,即将完成指定的LBT Cat4机制或快速的LBT机制的载波,若当前随机回退值值N满足预设的门限值时,则停止其他正在执行指定的LBT Cat4机制或快速的LBT机制的载波上的LBT过程,立刻执行LBT Cat2机制;在每个载波上完成对应LBT过程的载波的情况下,则传输设备判定获取到成功完成LBT过程的载波的使用权;或,
在载波集合中部分载波上完成指定的LBT Cat4机制或快速的LBT机制,且未完成指定的LBT Cat4过程或快速的LBT机制的载波上当前的随机回退值N满足预设的门限值的情况下,判定获取到成功完成LBT过程的载波的使用权;或,
若在开始传输时刻之前未完成指定LBT Cat4过程或快速的LBT机制的载波上的最后一次或最后连续若干次的CCA检测信道空闲,则传输设备判定获取的载波的使用权。
进一步地,在载波集合中选定的一个或多个载波上执行指定的LBT Cat4机制即将成功时,在剩余的载波上执行LBT Cat2机制的情况下,确定获取信道使用权包括:
在载波集合中选定的一个载波上执行指定的LBT Cat4机制即将成功时,在剩余的载波上执行LBT Cat2机制,当每个载波上均完成各自对应的LBT过程时,判定获取到成功完成LBT过程的载波的使用权;或者,
在载波集合中选定的多个载波上均执行指定的LBT Cat4机制即将同时成功时,在剩余的载波上执行LBT Cat2机制,当每个载波上均完成各自对应的LBT过程时,判定获取到成功完成LBT过程的载波的使用权;或者,
在载波集合中选定的多个载波上执行指定的LBT Cat4机制,如果有至少一个载波上即将完成指定的LBT Cat4机制,在剩余的载波上执行LBT Cat2机制,当每个载波上均完成各自对应的LBT过程时,判定获取到成功完成LBT过程的载波的使用权。
进一步地,在载波集合中选定的一个或多个载波上执行特定的LBT Cat4机制,剩余的载波上执行快速的LBT机制的情况下,确定获取信道使用权包括:
在载波集合中选定的一个载波上执行指定的LBT Cat4机制,在剩余的载波上执行快速的LBT机制的情况下,若各个载波上在传输开始之前完成对应的LBT过程,则判定获取到成功完成LBT过程的载波的使用权;或者,
在载波集合中选定的一个载波上执行指定的LBT Cat4机制,在剩余的载波上执行快速的LBT机制的情况下,若各个载波上在传输开始之前有部分载波上未完成对应的LBT过程,则若未完成LBT过程的载波上的当前随机回退值N满足预设的门限值,则判定获取到成功完成LBT过程的载波的使用权;或者,
在载波集合中选定的一个载波上执行指定的LBT Cat4机制,在剩余的载波上执行快速的LBT机制的情况下,若各个载波上在传输开始之前有部分载波上未完成对应的LBT过程,则若未完成LBT过程的载波上的最后一次或最后连续若干次CCA检测到信道为空闲,则判定获取到成功完成LBT过程的载波的使用权;或者,
在载波集合中选定的多个载波上执行指定的LBT Cat4机制,在剩余的载波上执行快速的LBT机制的情况下,若有一个载波上对应的LBT过程的随机回退值N满足特定的门限值,则剩余载波上停止各自的LBT过程,立刻执行LBT Cat2机制;若各个载波在传输开始之前完成对应的LBT过程,则判定获取到成功完成LBT过程的载波的使用权;或者,
在载波集合中选定的多个载波上执行指定的LBT Cat4机制,在剩余的载波上执行快速的LBT机制的情况下,若在传输开始之前有载波先完成对应的LBT过程,则可以发送预留信号,或者执行自延迟操作;未完成对应的LBT过程的载波继续执行CCA检测,若在传输开始时刻依然未完成LBT过程的载波,判断载波上当前随机回退值N满足特定的门限值或最后一次或最后连续若干次CCA检测信道为空闲,则判定获取到成功完成LBT过程的载波的使用权;或者,
在载波集合中选定的多个载波上执行指定的LBT Cat4机制,在剩余的载波上执行快速的LBT机制的情况下,若各个载波上按照各自的LBT机制进行信道的竞争接入,如果在开始传输时刻之前完成对应的LBT过程的载波上,则传输设备判定获取到成功完成LBT过程的载波的使用权;或者,
在载波集合中选定的多个载波上执行指定的LBT Cat4机制,在剩余的载波上执行快速的LBT机制的情况下,若各个载波上按照各自的LBT机制进行信道的竞争接入,如果在开始传输时刻之前载波上未完成LBT过程,则若各载波上当前随机回退值N满足预设的门限值的载波,或者,最后一次或最后连续若干次CCA检测信道为空闲,则传输设备判定获取到成功完成LBT过程的载波的使用权;或者,
在载波集合中选定的多个载波上执行指定的LBT Cat4机制,在剩余的载波上执行快速的LBT机制的情况下,若有载波上的随机回退值N满足第一门限值时,则其他载波上的随机回退值N调整到第一门限值;若调整随机回退值N后的载波上的随机回退值N满足第二门限值时,则其他载波上的随机回退值N调整到第二门限值,以此类推,在开始传输时刻开始之前, 如果随机回退值N递减到0或完成对应LBT过程的载波,或,如果在开始传输时刻之前载波上未完成LBT过程,则若载波上当前随机回退值N满足预设的门限值的载波,或者,最后一次或最后连续若干次CCA检测信道为空闲,则传输设备判定获取到成功完成LBT过程的载波的使用权。
进一步地,本申请实施例提供的多载波的竞争接入方法还包括:
在按照先听后说LBT机制竞争接入信道失败的载波,或,载波上待传输的数据包的情况下,依据预设方式执行处理流程;其中,预设方式包括之一:
放弃执行LBT失败的载波,或者,放弃在载波上传输;
对执行LBT失败的载波上的数据包进行重传;
在竞争成功的载波上的备选的资源上传输数据包;
使用备用的非授权载波;复用其他载波上相同资源一起传输各自的数据包;
其中,不同数据在同一个资源上发,若秩指示(Rank Indicator,简称RI)大于2,则可以复用该资源进行传输,或是通过随机接入无线网络临时标识(Random Access Radio Network Temporary Identifier,简称RNTI)或循环移位(Cycle Shift,简称CS)编码在同一资源上发送不同的数据块。
实施例二
在本实施例中提供了一种多载波的竞争接入方法,该流程包括如下步骤:
步骤S1,依据第一预设条件获取执行先听后说LBT机制的载波集合;
本申请实施例提供的多载波的竞争接入方法可以适用于长期演进(Long Term Evolution,简称LTE/LTE-A)系统中,尤其可以应用于非授权频谱的载波业务。
其中:第一预设条件包括:基站指示;或者,基站指示和用户设备(User Equipment,简称UE)选择结合;或者,用户设备UE自主选择;或者,预定义。即,在获取执行先听后说(Listen Before Talk,简称LBT)机制的载波集合的过程中,对于基站侧和终端侧分别包括不同的方式。
对于基站侧,可以通过在可用载波集中随机选择特定载波集合中的载波,或者,预定义方式,或者,基于UE测量上报,基站确定特定载波集合中的载波。
而对于终端侧,在获取到的载波集合中可以包括:基站指示特定载波集合中的载波,或者,UE在基站指示的载波集合中随机选择或预定义特定载波集合中的载波,或者,UE自主选择特定载波集合中的载波。
步骤S2,根据预设的调度方式,在载波集合中依据第二预设条件执行信道的竞争接入。
在本申请实施例中,执行信道的竞争接入的方式上,依据第二预设条件分为两类,类别一,在载波集合中的每个载波上按照相同的先听后说LBT机制执行信道的竞争接入;类别二,在载波集合中的每个载波上按照不同的先听后说LBT机制执行信道的竞争接入。其中,预设的调度方式包括:自载波调度方式,或,跨载波调度方式。
这里自载波调度方式为当基站执行下行LBT机制竞争到非授权载波的使用权,在非授权载波上发送上行授权信息时,用户设备UE在收到上行授权信息后,在对应的载波集合上执行上行信道竞争接入;
跨载波调度方式为当基站不用执行下行LBT机制,而是通过授权载波发送上行授权信息时,用户设备UE在收到上行授权信息后,在对应的载波集合上执行上行信道竞争接入。
本申请实施例提供的多载波的竞争接入方法,通过依据第一预设条件获取执行先听后说LBT机制的载波集合;根据预设的调度方式,在载波集合中依据第二预设条件执行信道的竞争接入。解决相关技术中由于缺少上行多载波的LBT竞争接入方法,导致上行数据传输性能在高负载的运行状态差的问题,进而达到了提升上行数据传输性能在高负载的运行状态的效果。
具体的,本申请实施例提供的多载波的竞争接入方法,在调度方式为自载波调度方式的情况下,且在步骤S104中的类别一的条件下具体如下:
优选地,依据步骤S104中的类别一,在载波集合中的每个载波上按照相同的先听后说LBT机制执行信道的竞争接入包括:
用户设备UE在每个载波上均按照指定的先听后说LBT机制进行信道的竞争接入;
该指定的先听后说LBT机制包括以下之一:LBT Cat2机制;增强型的LBT Cat2机制;配置的用于执行LBT过程的时间长但随机回退值N小的LBT Cat4机制;快速的先听后说LBT机制;其中,快速的先听后说LBT机制包括以下之一:延时期+扩展干净信道评估(defer period+ECCA,简称defer period+Extended Clear Channel Assessment)过程,或,直接扩展干净信道评估ECCA过程。
在每个载波上均按照指定的先听后说机制进行信道的竞争接入;其中,指定的先听后讲机制(Listen Before Talk,简称LBT)包括以下至少之一:LBT Cat2机制、增强型的LBT Cat2机制、LBT Cat4机制或快速的先听后说LBT机制,其中,快速的先听后说LBT机制包括以下至少之一:延时defer period+ECCA机制或过程或直接ECCA机制。
具体的,指定的先听后说LBT机制具体如下:
类1:无随机回退的LBT机制,即,LBT Cat2机制。空闲信道评估(Clear Channel Assessment,简称CCA)检测时长可配置为下述之一:34us、25us、20us、18us、16us、9us或10us。其中:CCA检测时长内的CCA检测的粒度可以是4us或9us。如果检测信道连续空闲的时间为上述配置的之一的检测时长,则传输设备认为获取到非授权载波的使用权。或者, 如果检测信道从忙到闲,且连续检测信道空闲的时间为上述配置的之一的检测时长,则传输设备认为获取到非授权载波的使用权。或者,如果在上述配置的之一的检测时间内,检测评估信道为忙,则认为信道或非授权载波不可用。这里,传输设备执行LBT Cat2的位置是固定的。优选的,固定位置在子帧边界之前的至少上述配置的之一的CCA检测时长位置。如果固定位置太靠前,可能导致提前完成LBT Cat2过程,从而需要发送初始信号或预留信号,这样导致系统效率低下。另一个方面,多个传输设备配置相同LBT Cat2固定的CCA检测位置,有利于实现复用。而如果不同传输设备之间存在一定的时延,则会出现CCA位置提前的总能以极高的搞了优先的占用信道,而CCA位置靠后的则总是受阻状态。为了解决该问题,可以采用类2中提出的增强型LBT Cat2机制。
类2:无随机回退的LBT机制,即,增强型的LBT Cat2机制。与类1不同之处在于,不同运营商中的设备或者同一运营商内的不同设备可以在事先划分好的K个时间段中不同的固定时间段上开始进行CCA检测,其K个时间段中每个都可能作为设备的CCA检测的起点,或者,随机的在K个时间段中随机选择一个时间段作为CCA检测的起点。按照固定的CCA检测起点,或者,按照随机选择的CCA检测起点开始执行CCA检测,只要检测信道从忙到闲,且连续检测信道空闲时间不小于CCA检测时长,或者,只要检测信道连续空闲的时间不小于CCA检测时长,则认为设备获取到信道的使用权。其中:CCA检测时长可配置为下述之一34us、25us、20us、18us、16us、9us或10us。CCA检测时长内的CCA检测的粒度可以是4us或9us。其中,对于不同运营商下的设备,可以配置不同的CCA检测起点,或者,可以随机选择CCA检测起点。而对于同异运营商下的设备,不同的设备可以配置不同的CCA检测起点,或者,可以随机选择CCA检测起点。目的是为了解决设备间的碰撞问题而造成的总有一方一直竞争不到信道的问题。
类3:defer period+ECCA过程,即,快速LBT机制。Defer period延迟期是由16us加上n乘以一个slot所得值。n为大于0的整数,slot为9us。简要的defer period+ECCA过程为:先执行defer period时长的CCA检测,当在defer period内检测信道为空闲时,设备进入到ECCA随机回退过程中,在ECCA随机回退中,当在一个slot时间内检测信道空闲,则设备进入到下一次的slot检测。反之,当slot时间内检测到信道忙,则设备进入到defer period期。在ECCA随机回退过程中slot时间内检测信道空闲,随机回退值N执行递减一定数值操作。直到随机回退值N递减到0,设备认为获取到信道的使用权。优选的,递减量为1,但不仅限于该值。N可以预先定义,或,基站指示,或者,随机产生。可选的,在defer period期内,n个9us slot内只要检测到信道为空闲,可选的,N值也可以执行递减操作。或者,在整个defer period期内检测到信道空闲,N执行递减一定数量值操作。例如:defer period由16us和3个slot组成,当整个defer period期检测到信道空闲时,N可以执行递减1操作,或者,N可执行递减3操作。递减的数值可与n值相同。
此外,快速LBT机制还包含直接ECCA过程。其直接ECCA过程与defer period+ECCA过程不同之处在于,设备是直接进行ECCA随机回退过程,而没有最先的defer period延迟期检测。当ECCA随机回退过程中,如果一个slot时间内检测到信道空闲,则设备进入到下一 次的slot检测。反之,当slot时间内检测到信道忙,可选地,设备进入到defer period期,或进入到下一次的slot检测。slot时间内检测到信道空闲,或,defer period延迟期中检测到信道空闲,随机回退值N可进行递减一定数量的操作。直到N递减到0,则设备认为获取到信道的使用权。
类4:有随机回退的LBT机制,即,LBT Cat4机制。与类3不同之处在于,设备需要先执行第一CCA检测,如果检测信道空闲,则设备进入到第一defer period检测期,如果第一defer period检测期内信道空闲,则设备认为获取到信道的使用权。而如果设备执行第一CCA检测信道为忙,则设备进入到第二defer period检测期,如果第二defer period检测期内信道空闲,则设备判断当前N值是否为0。如果N为0,则设备认为获取到信道的使用权。如果N不为0,则执行N递减操作或不对N进行任何操作。进而进行ECCA中的slot时间内的信道忙闲检测,如果slot时间内检测到信道为空闲,则设备进入到下一次的slot信道检测。如果slot时间内检测到信道为忙,则设备进入到第二defer period检测期,重复上述,直到随机回退值N递减到0,则设备认为成功获取到非授权载波的使用权。
其中:对于上行采用的LBT Cat4,最大竞争窗大小比下行采用的竞争窗小。对于自调度情况,最大竞争窗可以从集合{3,4,5,6,7,8,9,10,11,12,13,14,15}中选择。而对于跨载波调度,最大竞争窗一定要比自调度的竞争窗大,如:最大竞争可以从集合{15,31,63,255,511}中选择。
这里本申请实施例中LBT Cat4的最大竞争窗仅以上述为例,以实现本申请实施例提供的多载波的竞争接入方法为准,具体不做限定。
进一步地,当下行传输burst和上行传输burst之间的间隙Gap时长小于或等于预设的门限值时,用户设备选择是否执行上行LBT机制或执行LBT Cat2机制。
进一步地,在指定的先听后说机制为LBT Cat2机制的情况下,在载波集合中的每个载波上按照的LBT Cat2机制进行信道的竞争接入时,获取信道的使用权包括:
在每个载波上按照LBT Cat2机制执行信道的竞争接入,对于成功完成LBT Cat2机制的载波,判定获取到成功完成LBT Cat2机制载波的使用权;或者,
在K个载波中有S个载波上执行LBT Cat2机制成功,在剩余载波上执行LBT Cat2机制失败时,若成功执行LBT Cat2机制的载波总数不满足特定的载波数量,则按照预设方式处理;
其中,判定传输设备未获取到载波的使用权;或,在执行LBT Cat2机制失败的载波中随机选择载波来满足特定的载波数量;或,直接评定在执行LBT Cat2机制失败的载波上,传输设备获取到载波的使用权;若成功执行LBT Cat2机制的载波总数满足特定的载波数量,则传输设备使用或认为获取到成功完成LBT Cat2机制载波的使用权。
具体的,如果用户在每个载波上执行LBT Cat2成功,即执行一次CCA检测评估出信道空闲,则用户设备认为获取到检测信道空闲的哪些非授权载波的使用权。而对于执行LBT Cat2 失败的载波,则用户设备放弃使用执行LBT Cat2过程失败的载波。
进一步地,成功执行LBT Cat2机制包括:若检测到信道从忙到闲,且检测信道连续空闲的时间大于和/或等于预设空闲信道评估CCA检测时长,或者,检测信道连续空闲的时间大于和/或等于预设空闲信道评估CCA检测时长,则判定传输设备获取到非授权载波的使用权,或,完成LBT Cat2过程。
其中,LBT Cat2机制中,认为LBT成功或获取到非授权的使用权有两种方式:方式1:在CCA检测时长内信道都空闲,则认为执行LBT Cat2成功,即获得非授权载波的使用权。而只要在CCA检测时长内出现信道为忙,则认为LBT Cat2失败,即不能获得非授权载波的使用权。方式2:在可用的信道接入时间段内,只要信道从忙到闲,且检测信道连续空闲的时间长度满足CCA检测时长,或者,只要检测信道连续空闲的时间长度满足CCA检测时长,则认为LBT Cat2成功,即获取非授权载波的使用权。
对于多载波上的竞争接入,传输设备可以在多个载波上同时开始执行LBT Cat2机制,即执行CCA检测是的起点是相同的。而如果是增强型的LBT Cat2,对于同运营商中的不同传输设备(UE或基站)或是不同运营商中的传输设备来说,可以在各自待聚合的多个载波上配置不同的CCA检测起始位置或者随机选择CCA检测的起始位置,为了防止其中一方总能竞争到信道,而另一方受阻的现象,从而导致竞争接入不公平问题。同样该方式,也适用于下行多载波LBT中的同运营商下的不同基站或是不同运营商下的基站的处理。
进一步地,在指定的先听后说机制为增强型的LBT Cat2机制,空闲信道评估CCA检测时长的检测起始位置包括固定CCA检测起始位置或随机选择CCA检测起始位置的情况下,在每个载波上均按照指定的先听后说LBT机制进行信道的竞争接入包括:
在每个载波上按照共同的固定的CCA检测起始位置进行信道的竞争接入;或,
在每个载波上按照独立的固定的CCA检测起始位置进行信道的竞争接入;或,
在每个载波上按照共同的随机选择的CCA检测起始位置进行信道的竞争接入;或,
在每个载波上按照独立的随机选择的CCA检测起始位置进行信道的竞争接入。
进一步地,当CCA的检测起始位置为固定CCA检测起始位置时,预先将竞争接入时间区域划分为K个CCA检测时间段;在K个CCA检测时间段上,各个传输设备固定的从K个不同的时间段的一个固定的起点开始进行CCA检测。
进一步地,不同传输设备在K个不同时间段上有不同的固定CCA检测起点;或者,不同传输设备在K个不同时间段上有相同的固定CCA检测起点。
具体的,通过预先把可用的竞争接入时间区域划分为K个CCA检测时间段;不同运营商中的传输设备或者同一运营商内的不同传输设备在K个时间段上按照固定的不同的时间段的起点作为各自的CCA检测的起点。如果检测信道从忙到闲,且连续检测信道空闲时间大于或 等于CCA检测时长,或,检测到信道连续空闲的时间大于或等于CCA检测时长,则认为设备获取到信道的使用权。
进一步地,当CCA的检测起始位置为随机CCA检测起始位置时,预先将竞争接入时间区域划分为K个CCA检测时间段;在K个CCA检测时间段上传输设备随机选择各自的CCA检测时间段的起点作为CCA检测的起点;或者,传输设备在竞争接入时间区域上随机选择各自的CCA检测起点;或者,传输设备在K个CCA检测时间段上随机选择各自的CCA检测时间段且在CCA检测时间段内随机选择CCA检测起点;或者,传输设备在K个CCA检测时间段上固定一个CCA检测时间段,且在CCA检测时间段内随机选择CCA检测起点。
进一步地,若传输设备检测信道从忙到闲,且连续检测信道空闲时间大于和/或等于CCA检测时长,或者,检测信道连续空闲的时间大于和/或等于预设空闲信道评估CCA检测时长,则判定传输设备获取到非授权载波的使用权,或,完成增强型的LBT Cat2过程。
具体的,通过预先把可用的竞争接入时间区域划分为K个CCA检测时间段;不同运营商中的传输设备或者同一运营商内的不同传输设备在K个时间段上随机选择各自的CCA检测时间段的起点作为CCA检测的起点。如果检测信道从忙到闲,且连续检测信道空闲时间不小于CCA检测时长,或,检测到信道连续空闲的时间大于或等于CCA检测时长,则认为设备获取到信道的使用权。在多载波场景,不同运营商中的传输设备或者同一运营商内的不同传输设备在每个载波上的CCA检测起始位置可以是相同的,或者,不同。进一步地,在指定的先听后说LBT机制为快速的先听后说LBT机制的情况下,在每个载波上均按照指定的先听后说LBT机制进行信道的竞争接入包括:
在每个载波上按照快速的先听后说LBT机制完成信道的竞争接入的情况下,判定获取到成功完成LBT过程的载波使用权;或者,
在每个载波上按照快速的先听后说LBT机制执行信道的竞争接入,成功完成快速的先听后说LBT机制的载波,传输设备判定获取到成功完成快速的先听后说LBT过程的载波使用权;或者,未完成快速的先听后说LBT机制的载波上,传输设备认为该载波不可用,或者,对于未完成快速的先听后说LBT机制的载波,若随机回退值N满足特定的门限值,则传输设备判定获取到成功完成快速的先听后说LBT过程的载波使用权;若随机回退值N不满足特定的门限值,则判定未获取到该载波使用权,或放弃载波;或者,
在每个载波上按照快速的先听后说LBT机制执行信道的竞争接入,若最后一次或最后连续若干次CCA检测到信道空闲,则传输设备判定获取到成功完成快速的先听后说LBT过程的载波使用权;或者,
若存在一个即将完成快速的先听后说LBT机制的载波,其他载波上则停止当前的LBT过程,立刻按照LBT Cat2机制执行信道的竞争接入,在开始传输时刻之前完成对应的LBT过程的载波,则传输设备判定获取到载波使用权。
假定在P(总的载波数)个载波上执行先听后说LBT机制,如果在P个载波上同时执行LBT过程,P个载波中的随机回退值N递减0时,则认为获得载波的使用权。或者,传输设备仅获得在被调度的子帧或子帧边界或是预设的开始传输时刻点开始之前完成N递减到0操作的载波的使用权。或者,P个载波上的随机回退值N都递减到特定的门限值时,P个载波同时执行一个LBT Cat2,成功完成LBT Cat2过程的载波,传输设备认为获取到其载波的使用权。或者,K个载波上的随机回退值N都递减到特定的门限值时,冻结P-K个载波上执行快速LBT机制的随机回退值,触发这些载波上执行LBT Cat2,成功完成LBT Cat2过程的载波,传输设备认为获取到其载波的使用权。或者,K个载波上中的特定数量S个载波上的的随机回退值N都递减到特定的门限值时,冻结除S个载波外的载波上的随机回退值,或,停止除S个载波外的载波上的LBT过程,触发除S个载波外的载波执行LBT Cat2,成功完成LBT Cat2过程的载波,传输设备认为获取到其载波的使用权。其中,先递减到特定门限的载波上继续执行CCA检测,但不进行N值递减。
这里本申请实施例提供的多载波的竞争接入方法仅以上述参数为例进行说明,以实现本申请实施例提供的多载波的竞争接入方法为准,具体不做限定。
进一步地,在自载波调度方式下,在基站在每个载波上按照LBT Cat4机制执行信道的竞争接入的情况下,在载波集合中的每个载波上按照不同的先听后说LBT机制执行信道的竞争接入包括:
在选定的一个或是多个载波上执行LBT Cat2机制,在载波集合中的其他载波上不执行LBT机制;
在选定的一个或是多个载波上执行快速LBT机制,在载波集合中的其他载波上不执行LBT机制;
在选定的一个或是多个载波上执行快速的LBT机制,在一个或多个载波上即将完成快速LBT过程时,在载波集合中的其他载波上执行LBT Cat2机制。进一步地,在选定的一个或多个载波上即将完成快速的LBT机制时,在载波集合中的其他载波上执行LBT Cat2机制包括:
当一个载波上执行快速的LBT过程中的随机回退值N均递减到特定门限值时,载波集合中的其他载波开始执行LBT Cat2机制;或,
当多个载波上各自执行快速的LBT过程中的随机回退值N均递减到特定门限值时,载波集合中的其他载波开始执行LBT Cat2机制;其中,N值先递减到特定门限值的载波上可执行自延迟操作;或,
当多个载波上执行快速的LBT过程同时检测到信道空闲时,各个载波上的随机回退值N进行递减操作,且N值递减到特定门限值时,载波集合中的其他载波开始执行LBT Cat2机制。
进一步地,在预设的调度方式为自载波调度方式下,在基站选定的主载波上按照LBT Cat4机制,辅载波上按照LBT Cat2机制进行信道的竞争接入的情况下,在载波集合中依据第二预 设条件执行信道的竞争接入包括:
在基站指示的主载波上执行LBT Cat2机制,在基站侧指示的辅载波上执行简化的LBT Cat4或快速的LBT机制;或,
在载波集合中的每个载波上均执行LBT Cat2机制;或,
在载波集合中的每个载波上执行配置的用于执行LBT过程的时间长但随机回退值N相对小的LBT Cat4或快速的LBT机制;或,
在基站执行LBT Cat4的载波上,不执行LBT机制,在基站执行LBT Cat2的载波上,执行配置的用于执行LBT过程的时间长但随机回退值N相对小的LBT Cat4或执行快速LBT过程;或,
在基站执行LBT成功的载波上,若下行传输burst和上行传输burst之间的间隙Gap小于预设值,则不执行LBT机制,或,执行LBT Cat2机制。
进一步地,在预设的调度方式为跨载波调度方式下,在载波集合中依据第二预设条件执行信道的竞争接入包括:
在载波集合中的每个载波上执行指定的LBT Cat4机制;其中,指定的LBT Cat4机制是指最大竞争窗大小比自载波调度执行LBT Cat4的竞争窗大,且比下行执行LBT Cat4机制的竞争窗小的有随机回退的LBT过程;或者,
在载波集合中的每个载波上执行快速的LBT机制;其中:快速的LBT机制包括:defer period+ECCA或直接ECCA过程;
或者,
在载波集合中选定的一个或多个载波上执行指定的LBT Cat4机制即将成功时,在剩余的载波上执行LBT Cat2机制;
或者,
在载波集合中选定的一个或多个载波上执行特定的LBT Cat4机制,剩余的载波上执行快速的LBT机制;
或者,
在载波集合中选定的一个或多个载波上执行快速的LBT机制,剩余的载波上执行LBT Cat2机制。
具体的,在快速LBT机制包括延时defer period+ECCA过程或者直接ECCA过程的情况下,在指定载波集合中指定的K个载波上按照快速LBT机制执行信道的竞争接入,在指定载波集合中其余的载波上按照LBT Cat2机制进行信道的竞争接入包括:
在指定载波集合中指定的K个载波上按照defer period+ECCA过程或者直接ECCA过程执行信道的竞争接入,在指定载波集合中剩余的载波上按照LBT Cat2机制进行信道的竞争接入;其中:K个载波上即将完成defer period+ECCA过程或者直接ECCA过程时,触发其余载波上执行LBT Cat2机制。或者,
若K个载波中的一个载波上即将完成defer period+ECCA过程,则K-1个载波冻结当前的随机回退值或停止K-1个载波上defer period+ECCA过程,执行LBT Cat2机制,并在除K个载波外的载波上开始执行LBT Cat2机制;
若在每个载波上按照各自的LBT机制成功完成LBT过程,则判定获取到成功完成LBT过程对应的非授权载波的使用权。
具体的,假设K为大于等于1且小于总载波数P的值。选定K个执行快速LBT机制的载波方法同上。快速LBT机制,如:defer period+ECCA过程(记为快速LBT机制1)、直接ECCA过程(记为快速LBT机制2)。
以快速LBT机制1为例说明本实施例的多载波竞争接入方法,传输设备在特定的K个载波上按照defer period+ECCA过程执行信道的竞争接入,在剩余的载波上按照LBT Cat2机制进行信道的竞争接入。如果K个载波中的一个载波上即将完成defer period+ECCA过程,则其余K-1个载波冻结当前的随机回退值或停止其载波上defer period+ECCA过程,转而执行LBTCat2机制。同时也在除K个载波外的载波上开始执行LBT Cat2机制,如果传输设备在每个载波上按照各自的LBT机制成功完成LBT过程,则认为获取到成功完成LBT过程对应的载波的使用权。或者,
在K个载波上分别即将完成defer period+ECCA过程时,在其余的载波上执行LBT Cat2机制。检测到信道空闲的载波上,传输设备认为获取到载波的使用权。其中,在每个载波上完成各自的LBT过程必须在调度用户设备的子帧开始之前或子帧边界或是传输开始时刻之前完成。这里,K个载波上都即将完成是指,K个载波上的随机回退值N都递减到一个特定门限值时,触发其他载波上执行LBT Cat2机制。假如K个中至少有一个载波上的随机回退值N递减到特定门限值,则此时该载波继续执行信道空闲检测,但不进行N值递减,直到K个载波全部N值递减到特定门限值时,触发除K个载波外的载波执行LBT Cat2。特定门限值可以预定义,或者,基站指示,或者,在小于N值的N分之M取整的值,其中M小于N,或者,在小于N值内的范围内随机选择一个值。特殊情况下,特定的门限可以是为0,即K个载波上的N值递减到0时,才能触发其他载波上执行LBT Cat2。或者,
在载波索引号为奇数的载波上执行defer period+ECCA机制,在偶数的载波上执行LBT Cat2机制。触发偶数载波上执行LBT Cat2的方法同上。或者,
K个载波中即将完成defer period+ECCA的载波数量达到特定的门限值,其门限值小于等于K,触发其他载波上执行LBT Cat2。其中即将完成LBT Cat4指的意思同上述一样。
进一步地,在载波集合中的每个载波上执行指定的LBT Cat4机制或快速的LBT机制的情况下,确定获取信道使用权包括:
在载波集合中的每个载波上均完成指定的LBT Cat4机制或快速的LBT机制的情况下,判定获取到成功完成指定的LBT Cat4机制或快速的LBT机制的载波的使用权;或,
在载波集合中,即将完成指定的LBT Cat4机制或快速的LBT机制的载波,若当前随机回退值值N满足预设的门限值时,则停止其他正在执行指定的LBT Cat4机制或快速的LBT机制的载波上的LBT过程,立刻执行LBT Cat2机制;在每个载波上完成对应LBT过程的载波的情况下,则传输设备判定获取到成功完成LBT过程的载波的使用权;或,
在载波集合中部分载波上完成指定的LBT Cat4机制或快速的LBT机制,且未完成指定的LBT Cat4过程或快速的LBT机制的载波上当前的随机回退值N满足预设的门限值的情况下,判定获取到成功完成LBT过程的载波的使用权;或,
若在开始传输时刻之前未完成指定LBT Cat4过程或快速的LBT机制的载波上的最后一次或最后连续若干次的CCA检测信道空闲,则传输设备判定获取的载波的使用权。
这里本申请实施例若使用LBT Cat4机制,如果上行采用LBT Cat4,则最大竞争窗的大小应比下行采用的竞争窗小。对于自调度情况,最大竞争窗可以从集合{3,4,5,6,7,8,9,10,11,12,13,14,15}中选择。而对于跨载波调度,最大竞争窗的大小可比自调度的竞争窗大,其最大竞争可以从集合{15,31,63,255,511}中选择。其中:每个载波上可以独立产生随机回退值N,或者,基站指示UE在每个载波使用的随机回退值N,或者,预定义每个载波上使用的随机回退值N。每个载波上的随机回退值N可以相同,或者,不同。
具体的,在指定的先听后说LBT机制为LBT Cat4机制的情况下,在每个载波上均按照指定的先听后说LBT机制进行信道的竞争接入的步骤包括以下至少之一:
第一个完成LBT Cat4过程的载波上,若成功完成LBT Cat4过程的时刻未到传输开始时刻或子帧边界,则在载波上发送预留信号;
若其他载波上未完成LBT Cat4过程,则继续执行空闲信道评估CCA检测;
若在开始传输时刻或子帧边界或是到规定的用于CCA检测的时间段结束,在指定载波集合中的载波上未完成LBT Cat4过程,则放弃载波;或者,若载波上的当前的随机回退值N递减到预设门限值,则判定获取到载波上的使用权;
具体的,首先完成LBT Cat4机制的载波上,如果成功完成LBT机制的时刻未到传输开始时刻或是子帧边界,则传输设备可以在该载波上发送预留信号(可以发送特定muting图样的预留信号)或者发送初始信号,可以通知抢占成功的载波情况或占住信道,或其他功能。其他载波上未完成LBT过程的继续执行CCA检测。如果在开始传输时刻或是子帧边界或是到规定的用于CCA检测的时间段结束,依然在某些载波上未完成LBT过程,则要么放弃该载波,要么评估该载波上的当前的随机回退值N是否满足一定的门限值,如果满足,则认为获取到 该载波上的使用权。而传输设备可以使用成功完成LBT Cat4过程的所有载波,用于进行信息的发送。如:上行数据,或下行数据的发送。
或者,若在指定载波集合中的载波上完成LBT Cat4过程,且未到开始传输时刻或子帧边界,则执行自延迟操作;
具体的,如果传输设备在某个载波上已经完成了LBT Cat4过程,且未到开始传输时刻或是子帧边界,则传输设备可以执行自延迟操作。其中,自延迟的时间粒度可以是slot长度。传输设备可以在LBT成功时刻到开始传输时刻或是子帧边界这段时间内继续执行ECCA过程,即重新产生一个N值,N的最大值需要根据在剩余的时间以及slot时隙长度9us来确定。或者,执行多次的LBT Cat2机制,多个LBT Cat2中只要检测信道空闲的次数满足一定门限时,或者,只要最后一次执行LBT Cat2成功,则认为获取到载波的使用权。在传输时刻开始之前或是规定的开始传输的时刻开始之前,未完成LBT Cat4过程的载波上继续执行CCA检测。如果在规定的开始传输时刻或是子帧边界,依然为完成LBT Cat4过程的载波,要么放弃使用该载波,要么进一步判断当前随机回退值N是否满足一定的门限值,如果满足,则认为获取到载波的使用权。或者,检测最后一次CCA检测是否信道空闲,如果空闲,则认为获取到载波的使用权。
或者,当即将完成LBT Cat4过程的载波,在随机回退值N递减到预设门限值时,其他载波上的LBT Cat4过程中的随机回退值调整为预设门限值;
若在开始传输时刻或子帧边界之前完成LBT过程的载波,则判定获取到成功完成LBT Cat4过程的非授权载波的使用权;
若未完成LBT过程的载波,且载波上最后一次CCA检测信道空闲,或者,载波上当前的随机回退值N在预设门限值,则判定获取到该载波的使用权。
具体的,即将完成LBT Cat4过程的载波,在随机回退值N递减到一定的门限值时,启动自延迟且自延迟的时间粒度为一个slot长度(9us),在自延迟期间检测到信道空闲,随机回退值N不进行递减操作。目的是为了等待其他载波上的LBT过程。其中,每次自延迟的次数可以预定义,或者,根据前一段时间内自延迟数值时的LBT成功或失败次数的统计值,调整连续或离散的自延迟次数的大小,或者,根据该时刻距离子帧边界或是子帧开始传输时刻剩余时间来确定,或者,自延迟的次数可以根据其他载波上的LBT执行情况确定。通过上述操作,在子帧边界或是传输开始时刻完成LBT过程的载波上可进行信息传输。失败的载波则放弃使用,或者,如果失败的在载波上是由于执行自延迟而导致最终N值没有递减到0,则可以进一步确定此时的N值是否满足一定的门限值,如果满足,则认为用户设备可以使用该载波。或由于信道状况很差或干扰严重导致信道检测忙的次数多,从而导致N值递减很慢,且进一步确定在最后一次CCA检测时,检测到信道为空闲,和/或当前的随机回退值N满足一定的门限值,则认为用户设备可以使用该载波。
如果有一个载波即将完成LBT Cat4过程,或者,有一个载波上的随机回退值率先递减到 一定的门限值时,其他载波上的随机回退值调整到即将成功的载波上的当前N值。从而确保每个载波上都能以极高的概率完成LBT过程,从而获取到对应载波上的使用权。其中,可以设置多个门限值,满足一个门限值就调整一次所有载波上的随机回退值为最先满足门限值载波上的当前随机回退值。随机回退值递减到0的载波上,则传输设备认为获取到载波的使用权,其可以用于进行信息传输。或者,载波上的随机回退值满足预设的门限值,其也可以认为获取到载波的使用权,可以进行信息传输。
或者,每个载波上配置相同的随机回退值N,且每个载波上都检测到信道空闲时,随机回退值N进行递减操作。所有载波上都完成LBT Cat4过程,才可以使用多个非授权载波。
这里本申请实施例中快速LBT机制的信道的竞争接入方式与LBT Cat4机制处理方式相同,即,按照defer period+ECCA过程和直接ECCA过程。采用快速的LBT机制是为了让传输设备在多个载波上尽可能快的完成信道的竞争接入获取到信道的使用权。上述有随机回退的LBT方案中,N值是介于0到q之间的整数,q是介于最小竞争窗和最大竞争窗之间的数值。其中,对于上行最小竞争窗为1,最大竞争窗大小可以从{3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,31,63,255,511}集合中选择。
此外,传输设备在每个载波上传输的数据包可以相同,或者,不同。以及,在每个载波上给传输设备分配的资源位置和资源块大小可以是相同,或是不同。
上述各种情况,如果在某一个载波上即将完成LBT过程,则其他载波可以执行一个LBT Cat2机制,其中,检测时长可以为9us的整数倍。其检测时长与即将完成LBT过程的当前N值有关,例如,载波1上的LBT过程中的随机回退值N递减到2,启动其他载波上执行LBT Cat2,其CCA检测时长可以是9us、18us或者9us的倍数,最大值不能超过当前时刻到子帧边界之间的时长。
进一步地,在载波集合中选定的一个或多个载波上执行指定的LBT Cat4机制即将成功时,在剩余的载波上执行LBT Cat2机制的情况下,确定获取信道使用权包括:
在载波集合中选定的一个载波上执行指定的LBT Cat4机制即将成功时,在剩余的载波上执行LBT Cat2机制,当每个载波上均完成各自对应的LBT过程时,判定获取到成功完成LBT过程的载波的使用权;或者,
在载波集合中选定的多个载波上均执行指定的LBT Cat4机制即将同时成功时,在剩余的载波上执行LBT Cat2机制,当每个载波上均完成各自对应的LBT过程时,判定获取到成功完成LBT过程的载波的使用权;或者,
在载波集合中选定的多个载波上执行指定的LBT Cat4机制,如果有至少一个载波上即将完成指定的LBT Cat4机制,在剩余的载波上执行LBT Cat2机制,当每个载波上均完成各自对应的LBT过程时,判定获取到成功完成LBT过程的载波的使用权。
具体的,若指定载波集合中K个载波中的一个载波上即将完成LBT Cat4,则指定载波集 合中其余K-1个载波冻结当前的随机回退值,或停止载波上LBT Cat4过程,执行LBT Cat2机制;并在指定载波集合中除K个载波外的载波上开始执行LBT Cat2机制;或者,
当在指定载波集合中K个载波上分别即将完成LBT Cat4过程时,在指定载波集合中其他的载波上执行LBT Cat2机制;
其中,K个载波上都即将完成LBT Cat4过程是指当K个载波上的随机回退值N都递减到一个预设阈值时,触发指定载波集合中其他载波上执行LBT Cat2机制。
具体的,首先选定按照LBT Cat4机制进行信道竞争接入的载波集合,可以通过随机选择,或者,预定义,或者,基站指示,或者,UE上报每个载波上的信道情况,由基站确定方式,或者,UE自主根据干扰情况确定。
传输设备在特定的K个载波上按照LBT Cat4机制执行信道的竞争接入,在剩余的载波上按照LBT Cat2机制进行信道的竞争接入。如果K个载波中的一个载波上即将完成LBT Cat4,则其余K-1个载波冻结当前的随机回退值,或停止其载波上LBT Cat4过程,转而执行LBT Cat2机制。同时也在除K个载波外的载波上开始执行LBT Cat2机制。如果传输设备在每个载波上按照各自的LBT机制成功完成LBT过程,则认为获取到成功完成LBT过程对应的载波的使用权。或者,
在K个载波上分别即将完成LBT Cat4过程时,在其余的载波上执行LBT Cat2机制。检测到信道空闲的载波上,传输设备认为载波的使用权。其中,在每个载波上完成各自的LBT过程必须在调度用户设备的子帧开始之前或是子帧边界之前或是传输开始时刻之前完成。这里,K个载波上都即将完成是指,K个载波上的随机回退值N都递减到一个特定门限值时,触发其他载波上执行LBT Cat2机制。假如K个中至少有一个载波上的随机回退值N递减到特定门限值,则此时该载波继续执行信道空闲检测,但不进行N值递减,直到K个载波全部N值递减到特定门限值时,触发除K个载波外的载波执行LBT Cat2。特定门限值可以预定义,或者,基站指示,或者,在小于N值的N分之M取整的值,其中M小于N,或者,在小于N值内的范围内随机选择一个值。或者,
在载波索引号为奇数的载波上执行LBT Cat4机制,在偶数的载波上执行LBT Cat2机制。触发偶数载波上执行LBT Cat2的方法同上。或者,
K个载波中即将完成LBT Cat4的载波数量达到特定的门限值,其门限值小于等于K,触发其他载波上执行LBT Cat2。其中即将完成LBT Cat4指的意思同上述一样。K为大于等于1的数值。
进一步地,在载波集合中选定的一个或多个载波上执行特定的LBT Cat4机制,剩余的载波上执行快速的LBT机制的情况下,确定获取信道使用权包括:
在载波集合中选定的一个载波上执行指定的LBT Cat4机制,在剩余的载波上执行快速的LBT机制的情况下,若各个载波上在传输开始之前完成对应的LBT过程,则判定获取到成功 完成LBT过程的载波的使用权;或者,
在载波集合中选定的一个载波上执行指定的LBT Cat4机制,在剩余的载波上执行快速的LBT机制的情况下,若各个载波上在传输开始之前有部分载波上未完成对应的LBT过程,则若未完成LBT过程的载波上的当前随机回退值N满足预设的门限值,则判定获取到成功完成LBT过程的载波的使用权;或者,
在载波集合中选定的一个载波上执行指定的LBT Cat4机制,在剩余的载波上执行快速的LBT机制的情况下,若各个载波上在传输开始之前有部分载波上未完成对应的LBT过程,则若未完成LBT过程的载波上的最后一次或最后连续若干次CCA检测到信道为空闲,则判定获取到成功完成LBT过程的载波的使用权;或者,
在载波集合中选定的多个载波上执行指定的LBT Cat4机制,在剩余的载波上执行快速的LBT机制的情况下,若有一个载波上对应的LBT过程的随机回退值N满足特定的门限值,则剩余载波上停止各自的LBT过程,立刻执行LBT Cat2机制;若各个载波在传输开始之前完成对应的LBT过程,则判定获取到成功完成LBT过程的载波的使用权;或者,
在载波集合中选定的多个载波上执行指定的LBT Cat4机制,在剩余的载波上执行快速的LBT机制的情况下,若在传输开始之前有载波先完成对应的LBT过程,则可以发送预留信号,或者执行自延迟操作;未完成对应的LBT过程的载波继续执行CCA检测,若在传输开始时刻依然未完成LBT过程的载波,判断载波上当前随机回退值N满足特定的门限值或最后一次或最后连续若干次CCA检测信道为空闲,则判定获取到成功完成LBT过程的载波的使用权;或者,
在载波集合中选定的多个载波上执行指定的LBT Cat4机制,在剩余的载波上执行快速的LBT机制的情况下,若各个载波上按照各自的LBT机制进行信道的竞争接入,如果在开始传输时刻之前完成对应的LBT过程的载波上,则传输设备判定获取到成功完成LBT过程的载波的使用权;或者,
在载波集合中选定的多个载波上执行指定的LBT Cat4机制,在剩余的载波上执行快速的LBT机制的情况下,若各个载波上按照各自的LBT机制进行信道的竞争接入,如果在开始传输时刻之前载波上未完成LBT过程,则若各载波上当前随机回退值N满足预设的门限值的载波,或者,最后一次或最后连续若干次CCA检测信道为空闲,则传输设备判定获取到成功完成LBT过程的载波的使用权;或者,
在载波集合中选定的多个载波上执行指定的LBT Cat4机制,在剩余的载波上执行快速的LBT机制的情况下,若有载波上的随机回退值N满足第一门限值时,则其他载波上的随机回退值N调整到第一门限值;若调整随机回退值N后的载波上的随机回退值N满足第二门限值时,则其他载波上的随机回退值N调整到第二门限值,以此类推,在开始传输时刻开始之前,如果随机回退值N递减到0或完成对应LBT过程的载波,或,如果在开始传输时刻之前载波上未完成LBT过程,则若载波上当前随机回退值N满足预设的门限值的载波,或者,最后一 次或最后连续若干次CCA检测信道为空闲,则传输设备判定获取到成功完成LBT过程的载波的使用权。
其中,每个载波上执行LBT过程的开始时间是相同的,也可以是不同的。每个载波上的随机回退值可以是配置为相同的值,也可以是各自独立生成随机回退值。
若所有载波上同时按照各自的LBT机制执行LBT过程,且所有载波中的随机回退值N递减0,则判定获得非授权载波的使用权;或者,
若所有载波中的部分载波上完成LBT过程,则认为传输设备获取到成功完成LBT过程的非授权载波的使用权;或者,
若所有载波上的随机回退值N都递减到指定的预设值时,所有载波同时执行一个LBT Cat2,成功完成LBT Cat2过程的载波,则判定为获取到载波的使用权;或者,
K个载波上的随机回退值N都递减到指定的预设值时,冻结执行快速LBT机制的载波上随机回退值,或停止执行快速LBT机制的载波上LBT过程,触发其载波上执行LBT Cat2,成功完成LBT Cat2过程的载波,判定为获取到载波的使用权;或者,
当K个载波上中的指定数量S个载波上的的随机回退值N都递减到预设值时,冻结除S个载波外的载波上的随机回退值,或,停止除S个载波外的载波上的LBT过程,触发除S个载波外的载波执行LBT Cat2,成功完成LBT Cat2过程的载波,则判定获取到其载波的使用权,其中,S小于K;或者,
所有载波中至少一个载波上的随机回退值N递减到指定的预设值时,冻结其他载波上的当前的随机回退值,或停止执行对应LBT机制的载波上LBT过程,触发其载波上执行LBT Cat2,成功完成LBT Cat2过程的载波,判定为获取到载波的使用权;
具体的,选定执行LBT Cat4机制的K个载波的方法有:随机选择,或者,预定义,或者,基站指示,或者,UE上报每个载波上的信道情况,由基站确定方式,或者,UE自主根据干扰情况确定。优选的,K个载波上信道干扰情况最小。K最小可取值为1。
其中,每个载波上可以采用相同的随机回退值N,或者,每个载波上分别各自产生随机回退值N。相同的N值可以是基站配置,或是预定义。对于上行的LBT Cat4中最大竞争窗大小一定小于下行采用的竞争窗。其由于上行用于执行LBT过程的OFDM数有限,优选的,一个OFDM符号或是2个OFDM符号,其最大竞争窗可从集合{3,4,5,6,7,8,9,10,11,12,13,14,15}中选择。次选地,大于2个OFDM符号,其最大竞争窗可以为31,63,125,255,511。
进一步地,本申请实施例提供的多载波的竞争接入方法还包括:
在按照先听后说LBT机制竞争接入信道失败的载波,或,载波上待传输的数据包的情况下,依据预设方式执行处理流程;其中,预设方式包括之一:
放弃执行LBT失败的载波,或者,放弃在载波上传输;
对执行LBT失败的载波上的数据包进行重传;
在竞争成功的载波上的备选的资源上传输数据包;
使用备用的非授权载波;复用其他载波上相同资源一起传输各自的数据包;
其中,不同数据在同一个资源上发,若秩指示(Rank Indicator,简称RI)大于2,则可以复用该资源进行传输,或是通过随机接入无线网络临时标识(Random Access Radio Network Temporary Identifier,简称RNTI)或循环移位(Cycle Shift,简称CS)编码在同一资源上发送不同的数据块。
具体的,如果UE待传输的数据包在特定的多个载波上都分别传输一部分。此时,执行LBT过程失败的载波上将不能传输该载波上分配的数据包。该部分数据包可以进行重传。或者,在竞争成功的载波上的备选的资源上传输该数据包。或者,启用备用的载波进行传输。或者,复用其他载波上资源一起传输,其中,不同数据在同一个资源上发,如果RI大于2,则可以复用该资源进行传输,或是通过RNTI或CS编码在同一资源上发送不同的数据块。其中,在某一个载波上指示一个额外(备选)的资源块,用于LBT失败时传输其他载波的数据包。备选资源的触发是UE在数据开始传输时刻或是子帧边界到来之前获知待聚合的多个载波中还有未执行LBT Cat2成功的载波,则触发成功完成LBT过程的载波上的备用资源。如果用户设备完成LBT过程的时刻未到子帧边界或是开始传输时刻,则需要在完成LBT过程的所有载波上发送预留信号直到子帧边界,或开始传输时刻。此外,如果多个UE配置同一个资源一起进行数据包传输,则考虑两个UE之间的信道环境是否满足SU或MU条件。如果在可用的信道竞争接入时间段内,用户设备在待聚合的多个载波上均执行LBT Cat2失败,则用户设备放弃此次传输。
上述实施例中的情况可以应用到多个载波组的情况,即每个载波组都可以采用相同的LBT机制,或者,载波组中的部分载波组采用一种LBT机制,其余载波组采用另一种LBT机制。
进一步地,上述所有实施例中,当自载波调度的时候,下行传输和上行传输之间的间隙Gap时间小于16us或25us的时候,上行多个载波上可以不执行LBT过程,或者,多个载波上的部分载波执行LBT Cat2,部分载波上不执行LBT。原因在于基站侧对应的载波上已经执行了LBT Cat4机制,因此从保证授权辅助接入(License assisted access,简称LAA)与WIFI系统的信道的竞争接入公平性角度,UE可以不执行LBT过程。进一步地,为了规避隐藏节点问题,UE侧可以在进行传输之前执行LBT Cat2机制。也可以采用LBT Cat2和no-LBT结合的方式。
上述多载波的竞争接入方法,对于上行,可以用于上行传输的第一个子帧或用户设备开始传输的第一个子帧之前,每个载波上的后续的上行子帧同样也可采用该载波上前一子帧采用的竞争接入方法,或者,后续子帧仍然调度的是同一个UE,其资源位置可相同或不同,则该UE可以不执行LBT,或是仅执行一个LBT Cat2(CCA检测可以在某些muting RE图样上 进行检测)。如果不是调度的同一个UE,则可采用与前一子帧相同的LBT机制,或者,比前一子帧所用的LBT机制的竞争窗更小窗或是更简化的LBT方式。
上述实施例中的方式可以应用于跨载波调度情况,其中,基站侧不执行LBT过程。而自载波调度情况略有不同,原因在于,基站侧已经执行了LBT Cat4或LBT Cat2机制,UE侧需要适当的调整多载波上的采用的竞争接入机制,从而避免LAA与WIFI系统共存场景时,使LAA系统处于竞争接入信道的劣势。
对于UE侧的授权信息和载波指示信息的发送,可以通过基站在授权载波上通过一个DCI通知UE在哪些非授权载波上进行信道的竞争接入,以及每个载波上的资源分配或调度信息等;或者,基站在授权载波上给UE发送多套授权信息,每套授权信息分别对应一个载波和载波上用户的调度信息;或者,基站在竞争到的非授权载波集合中的一个特定载波上发送UE在非授权载波集合上的载波信息和调度信息,其中:可以在一个非授权载波上发送一个DCI信息包含UE所执行信道的竞争接入的非授权载波集合和每个载波上的调度信息;或,可以在一个非授权载波上发送多个DCI信息,每个DCI信息中包含一个载波信息和一个调度信息;或,可以在基站竞争到的每个载波上分别发送各自的DCI信息,每个载波上发送的DCI信息中包含一个载波信息和一个调度信息。
实施例三
此外,本申请实施例中提供的一种多载波的竞争接入方法还用于单载波LBT的竞争接入方式下,如何解决不同运营商下的设备或是同一运营商下的不同设备之间阻塞问题。具体如下:
首先,通过采用增强型LBT Cat2机制来解决不同运营商下的设备或是同一运营商下的不同设备之间阻塞问题。其中,增强型LBT Cat2中有两种情况:CCA检测的起始位置固定,且不同的运营商下的设备或是同一运营商下的不同设备在配置的用于信道竞争接入的时间区间内在事先划分好的K个时间段中选择或按照某一固定时间段作为各自CCA检测的起点;或者,随机的在K个时间段中随机选择一个时间段作为CCA检测的起点。按照固定的CCA检测起点,或者,按照随机选择的CCA检测起点开始执行CCA检测,只要信道检测从忙到闲,且连续检测信道空闲时间不小于CCA检测时长,则认为设备获取到信道的使用权。其中:CCA检测时长可配置为下述之一34us、25us、20us、18us、16us、9us或10us。其中,对于不同运营商下的设备,可以配置不同的CCA检测起点,或者,可以随机选择CCA检测起点。而对于同一运营商下的设备,不同的设备可以配置不同的CCA检测起点,或者,可以随机选择CCA检测起点。目的是为了解决设备间的碰撞问题而造成的总有一方一直竞争不到信道的问题。
此外,对于固定CCA检测起始位置情况,不同运营商下的基站或UE,可以按照预定义 的不同的CCA检测起始位置,或者,通过后台配置不同运营商下的基站从不同的CCA检测起始位置开始执行CCA检测。而对于同运营商下的的不同基站,可以按照预定义的方法,或者,X2口交互方式,或者,后台配置方式使不同的基站配置不同的CCA检测起始位置。对于同运营商下的不同UE,可以按照预定义的方法,或者,基站指示方式,或者,后台配置方式使不同的UE配置不同的CCA检测起始位置。
对于DRS发送执行LBT过程,可以在连续的5个子帧中的每个子帧的最后两个OFDM符号时间区间内,不同运营商下的设备或是同一运营商下的不同设备,在两个符号中按照事先划分好的K个CCA检测时间段上给不同运营商下的设备或是同一运营商下的不同设备配置不同的固定CCA检测起点,或者,可以随机选择CCA检测起点。为了实现不同运营商下的设备或是同一运营商下的不同设备具有相对公平的发送DRS机会。或者,在5个连续子帧的时间区间,将其划分为L个CCA检测段,不同运营商下的设备或是同一运营商下的不同设备在这L个CCA检测时间段内可以配置不同的固定CCA检测起点,或者,可以随机选择CCA检测起点。
例如,在两个OFDM符号(大于142us)的时间内,假定CCA检测时长为20us,则将两个符号的时间划分为7个20us的CCA检测时间段。对于运营商A中的基站1,运营商B中的基站2,通过固定配置不同的CCA检测起点的方法,给基站1配置的CCA检测起点为第二个CCA检测时间段,即从21us开始执行CCA检测,而基站配置的CCA检测起点为第四个CCA检测时间段,即从61us时刻开始CCA检测。原则上,基站1具有极高的获取信道使用权的机会。而在下一次或一段时间后的信道竞争接入时,可以改变基站1和基站2执行CCA检测的起始位置,或者,可以交互基站1和2的CCA检测起始位置。
此外,基站1和2可以在这7个CCA检测时间段内随机的选择各自的CCA检测时间起点。这种方式会存在基站1和基站2都选择同一个时间段开始执行CCA检测,从而导致碰撞。
实施例四
通过以上的实施方式的描述,本领域的技术人员可以清楚地了解到根据上述实施例的方法可借助软件加必需的通用硬件平台的方式来实现,当然也可以通过硬件,但很多情况下前者是更佳的实施方式。基于这样的理解,本发明的技术方案本质上或者说对现有技术做出贡献的部分可以以软件产品的形式体现出来,该计算机软件产品存储在一个存储介质(如ROM/RAM、磁碟、光盘)中,包括若干指令用以使得一台终端设备(可以是手机,计算机,服务器,或者网络设备等)执行本发明各个实施例所述的方法。
在本实施例中还提供了一种载波的竞争接入装置,该装置设置为实现上述实施例及优选实施方式,已经进行过说明的不再赘述。如以下所使用的,术语“模块”可以实现预定功能的软件和/或硬件的组合。尽管以下实施例所描述的装置较佳地以软件来实现,但是硬件,或者软件和硬件的组合的实现也是可能并被构想的。
图2是根据本发明实施例的多载波的竞争接入装置的结构框图,如图2所示,该装置包 括:获取模块22和接入模块24,其中,
获取模块22,设置为依据第一预设条件获取执行先听后说LBT机制的载波集合;
接入模块24,设置为根据预设的调度方式,在载波集合中依据第二预设条件执行信道的竞争接入。
本申请实施例提供的多载波的竞争接入装置,通过依据第一预设条件获取执行先听后说LBT机制的载波集合;根据预设的调度方式,在载波集合中依据第二预设条件执行信道的竞争接入。解决相关技术中由于缺少上行多载波的LBT竞争接入方法,导致上行数据传输性能在高负载的运行状态差的问题,进而达到了提升上行数据传输性能在高负载的运行状态的效果。
进一步地,第一预设条件包括:基站指示;或者,基站指示和用户设备UE选择结合;或者,用户设备UE自主选择;或者,预定义。
进一步地,预设的调度方式包括:自载波调度方式,或,跨载波调度方式。
进一步地,第二预设条件包括:在载波集合中的每个载波上按照相同的先听后说LBT机制执行信道的竞争接入;或,在载波集合中的每个载波上按照不同的先听后说LBT机制执行信道的竞争接入。
进一步地,接入模块24包括:第一接入单元,设置为在调度方式为自载波调度方式的情况下,用户设备UE在每个载波上均按照指定的先听后说LBT机制进行信道的竞争接入;指定的先听后说LBT机制包括以下之一:LBT Cat2机制;增强型的LBT Cat2机制;配置的用于执行LBT过程的时间长但随机回退值N小的LBT Cat4机制;快速的先听后说LBT机制;其中,快速的先听后说LBT机制包括以下之一:延时期+扩展干净信道评估defer period+ECCA过程,或,直接扩展干净信道评估ECCA过程。
进一步地,执行单元,设置为当下行传输burst和上行传输burst之间的间隙Gap时长小于或等于预设的门限值时,选择是否执行上行LBT机制或执行LBT Cat2机制。
进一步地,装置包括:第一判定模块,设置为在指定的先听后说机制为LBT Cat2机制的情况下,在载波集合中的每个载波上按照的LBT Cat2机制进行信道的竞争接入时,在每个载波上按照LBT Cat2机制执行信道的竞争接入,对于成功完成LBT Cat2机制的载波,判定获取到成功完成LBT Cat2机制载波的使用权;或者,第二判定模块,设置为在K个载波中有S个载波上执行LBT Cat2机制成功,在剩余载波上执行LBT Cat2机制失败时,若成功执行LBT Cat2机制的载波总数不满足特定的载波数量,则按照预设方式处理;其中,预设方式包括:判定传输设备未获取到载波的使用权;或,在执行LBT Cat2机制失败的载波中随机选择载波来满足特定的载波数量;或,直接评定在执行LBT Cat2机制失败的载波上,传输设备获取到载波的使用权;若成功执行LBT Cat2机制的载波总数满足特定的载波数量,则传输设备使用或认为获取到成功完成LBT Cat2机制载波的使用权。
进一步地,成功执行LBT Cat2机制包括:若检测到信道从忙到闲,且检测信道连续空闲的时间大于和/或等于预设空闲信道评估CCA检测时长,或者,检测信道连续空闲的时间大于和/或等于预设空闲信道评估CCA检测时长,则判定传输设备获取到非授权载波的使用权,或,完成LBT Cat2过程。
进一步地,第一接入单元包括:第一检测子单元,设置为在指定的先听后说机制为增强型的LBT Cat2机制,空闲信道评估CCA检测时长的检测起始位置包括固定CCA检测起始位置或随机选择CCA检测起始位置的情况下,在每个载波上按照共同的固定的CCA检测起始位置进行信道的竞争接入;或,第二检测子单元,设置为在每个载波上按照独立的固定的CCA检测起始位置进行信道的竞争接入;或,第三检测子单元,设置为在每个载波上按照共同的随机选择的CCA检测起始位置进行信道的竞争接入;或,第四检测子单元,设置为在每个载波上按照独立的随机选择的CCA检测起始位置进行信道的竞争接入。
进一步地,当CCA的检测起始位置为固定CCA检测起始位置时,预先将竞争接入时间区域划分为K个CCA检测时间段;在K个CCA检测时间段上,各个传输设备固定的从K个不同的时间段的一个固定的起点开始进行CCA检测。
进一步地,不同传输设备在K个不同时间段上有不同的固定CCA检测起点;或者,不同传输设备在K个不同时间段上有相同的固定CCA检测起点。
进一步地,当CCA的检测起始位置为随机CCA检测起始位置时,预先将竞争接入时间区域划分为K个CCA检测时间段;在K个CCA检测时间段上传输设备随机选择各自的CCA检测时间段的起点作为CCA检测的起点;或者,传输设备在竞争接入时间区域上随机选择各自的CCA检测起点;或者,传输设备在K个CCA检测时间段上随机选择各自的CCA检测时间段且在CCA检测时间段内随机选择CCA检测起点;或者,传输设备在K个CCA检测时间段上固定一个CCA检测时间段,且在CCA检测时间段内随机选择CCA检测起点。
进一步地,若传输设备检测信道从忙到闲,且连续检测信道空闲时间大于和/或等于CCA检测时长,或者,检测信道连续空闲的时间大于和/或等于预设空闲信道评估CCA检测时长,则判定传输设备获取到非授权载波的使用权,或,完成增强型的LBT Cat2过程。
进一步地,第一接入单元包括:第一判定子单元,设置为在指定的先听后说LBT机制为快速的先听后说LBT机制的情况下,在每个载波上按照快速的先听后说LBT机制完成信道的竞争接入的情况下,判定获取到成功完成LBT过程的载波使用权;或者,第二判定子单元,设置为在每个载波上按照快速的先听后说LBT机制执行信道的竞争接入,成功完成快速的先听后说LBT机制的载波,传输设备判定获取到成功完成快速的先听后说LBT过程的载波使用权;或者,未完成快速的先听后说LBT机制的载波上,传输设备认为该载波不可用,或者,对于未完成快速的先听后说LBT机制的载波,若随机回退值N满足特定的门限值,则传输设备判定获取到成功完成快速的先听后说LBT过程的载波使用权;若随机回退值N不满足特定的门限值,则判定未获取到该载波使用权,或放弃载波;或者,第三判定子单元,设置为在 每个载波上按照快速的先听后说LBT机制执行信道的竞争接入,若最后一次或最后连续若干次CCA检测到信道空闲,则传输设备判定获取到成功完成快速的先听后说LBT过程的载波使用权;或者,第四判定子单元,设置为若存在一个即将完成快速的先听后说LBT机制的载波,其他载波上则停止当前的LBT过程,立刻按照LBT Cat2机制执行信道的竞争接入,在开始传输时刻之前完成对应的LBT过程的载波,则传输设备判定获取到载波使用权。
进一步地,接入模块24包括:第一执行单元,设置为在自载波调度方式下,在基站在每个载波上按照LBT Cat4机制执行信道的竞争接入的情况下,在选定的一个或是多个载波上执行LBT Cat2机制,在载波集合中的其他载波上不执行LBT机制;第二执行单元,设置为在选定的一个或是多个载波上执行快速LBT机制,在载波集合中的其他载波上不执行LBT机制;第三执行单元,设置为在选定的一个或是多个载波上执行快速的LBT机制,在一个或多个载波上即将完成快速LBT过程时,在载波集合中的其他载波上执行LBT Cat2机制。
进一步地,第三执行单元包括:第一执行子单元,设置为当一个载波上执行快速的LBT过程中的随机回退值N均递减到特定门限值时,载波集合中的其他载波开始执行LBT Cat2机制;或,第二执行子单元,设置为当多个载波上各自执行快速的LBT过程中的随机回退值N均递减到特定门限值时,载波集合中的其他载波开始执行LBT Cat2机制;其中,N值先递减到特定门限值的载波上可执行自延迟操作;或,第三执行子单元,设置为当多个载波上执行快速的LBT过程同时检测到信道空闲时,各个载波上的随机回退值N进行递减操作,且N值递减到特定门限值时,载波集合中的其他载波开始执行LBT Cat2机制。
进一步地,接入模块24包括:第四执行单元,设置为在预设的调度方式为自载波调度方式下,在基站选定的主载波上按照LBT Cat4机制,辅载波上按照LBT Cat2机制进行信道的竞争接入的情况下,在基站指示的主载波上执行LBT Cat2机制,在基站侧指示的辅载波上执行简化的LBT Cat4或快速的LBT机制;或,第五执行单元,设置为在载波集合中的每个载波上均执行LBT Cat2机制;或,第六执行单元,设置为在载波集合中的每个载波上执行配置的用于执行LBT过程的时间长但随机回退值N相对小的LBT Cat4或快速的LBT机制;或,第七执行单元,设置为在基站执行LBT Cat4的载波上,不执行LBT机制,在基站执行LBT Cat2的载波上,执行配置的用于执行LBT过程的时间长但随机回退值N相对小的LBT Cat4或执行快速LBT过程;或,第八执行单元,设置为在基站执行LBT成功的载波上,若下行传输burst和上行传输burst之间的间隙Gap小于预设值,则不执行LBT机制,或,执行LBT Cat2机制。
进一步地,接入模块24包括:第九执行单元,设置为在预设的调度方式为跨载波调度方式下,在载波集合中的每个载波上执行指定的LBT Cat4机制;其中,指定的LBT Cat4机制是指最大竞争窗大小比自载波调度执行LBT Cat4的竞争窗大,且比下行执行LBT Cat4机制的竞争窗小的有随机回退的LBT过程;或者,第十执行单元,设置为在载波集合中的每个载波上执行快速的LBT机制;其中:快速的LBT机制包括:defer period+ECCA或直接ECCA过程;或者,第十一执行单元,设置为在载波集合中选定的一个或多个载波上执行指定的LBT  Cat4机制即将成功时,在剩余的载波上执行LBT Cat2机制;或者,第十二执行单元,设置为在载波集合中选定的一个或多个载波上执行特定的LBT Cat4机制,剩余的载波上执行快速的LBT机制;或者,第十三执行单元,设置为在载波集合中选定的一个或多个载波上执行快速的LBT机制,剩余的载波上执行LBT Cat2机制。
进一步地,装置还包括:第五判定子单元,设置为在载波集合中的每个载波上均完成指定的LBT Cat4机制或快速的LBT机制的情况下,判定获取到成功完成指定的LBT Cat4机制或快速的LBT机制的载波的使用权;或,第六判定子单元,设置为在载波集合中,即将完成指定的LBT Cat4机制或快速的LBT机制的载波,若当前随机回退值值N满足预设的门限值时,则停止其他正在执行指定的LBT Cat4机制或快速的LBT机制的载波上的LBT过程,立刻执行LBT Cat2机制;在每个载波上完成对应LBT过程的载波的情况下,则传输设备判定获取到成功完成LBT过程的载波的使用权;或,第七判定子单元,设置为在载波集合中部分载波上完成指定的LBT Cat4机制或快速的LBT机制,且未完成指定的LBT Cat4过程或快速的LBT机制的载波上当前的随机回退值N满足预设的门限值的情况下,判定获取到成功完成LBT过程的载波的使用权;或,第八判定子单元,设置为若在开始传输时刻之前未完成指定LBT Cat4过程或快速的LBT机制的载波上的最后一次或最后连续若干次的CCA检测信道空闲,则传输设备判定获取的载波的使用权。
进一步地,第十一执行单元包括:第九判定子单元,设置为在载波集合中选定的一个载波上执行指定的LBT Cat4机制即将成功时,在剩余的载波上执行LBT Cat2机制,当每个载波上均完成各自对应的LBT过程时,判定获取到成功完成LBT过程的载波的使用权;或者,第十判定子单元,设置为在载波集合中选定的多个载波上均执行指定的LBT Cat4机制即将同时成功时,在剩余的载波上执行LBT Cat2机制,当每个载波上均完成各自对应的LBT过程时,判定获取到成功完成LBT过程的载波的使用权;或者,第十一判定子单元,设置为在载波集合中选定的多个载波上执行指定的LBT Cat4机制,如果有至少一个载波上即将完成指定的LBT Cat4机制,在剩余的载波上执行LBT Cat2机制,当每个载波上均完成各自对应的LBT过程时,判定获取到成功完成LBT过程的载波的使用权。
进一步地,第十二执行单元包括:第十二判定子单元,设置为在载波集合中选定的一个载波上执行指定的LBT Cat4机制,在剩余的载波上执行快速的LBT机制的情况下,若各个载波上在传输开始之前完成对应的LBT过程,则判定获取到成功完成LBT过程的载波的使用权;或者,第十三判定子单元,设置为在载波集合中选定的一个载波上执行指定的LBT Cat4机制,在剩余的载波上执行快速的LBT机制的情况下,若各个载波上在传输开始之前有部分载波上未完成对应的LBT过程,则若未完成LBT过程的载波上的当前随机回退值N满足预设的门限值,则判定获取到成功完成LBT过程的载波的使用权;或者,第十四判定子单元,设置为在载波集合中选定的一个载波上执行指定的LBT Cat4机制,在剩余的载波上执行快速的LBT机制的情况下,若各个载波上在传输开始之前有部分载波上未完成对应的LBT过程,则若未完成LBT过程的载波上的最后一次或最后连续若干次CCA检测到信道为空闲,则判定获取到成功完成LBT过程的载波的使用权;或者,第十五判定子单元,设置为在载波集合中选定的 多个载波上执行指定的LBT Cat4机制,在剩余的载波上执行快速的LBT机制的情况下,若有一个载波上对应的LBT过程的随机回退值N满足特定的门限值,则剩余载波上停止各自的LBT过程,立刻执行LBT Cat2机制;若各个载波在传输开始之前完成对应的LBT过程,则判定获取到成功完成LBT过程的载波的使用权;或者,第十六判定子单元,设置为在载波集合中选定的多个载波上执行指定的LBT Cat4机制,在剩余的载波上执行快速的LBT机制的情况下,若在传输开始之前有载波先完成对应的LBT过程,则可以发送预留信号,或者执行自延迟操作;未完成对应的LBT过程的载波继续执行CCA检测,若在传输开始时刻依然未完成LBT过程的载波,判断载波上当前随机回退值N满足特定的门限值或最后一次或最后连续若干次CCA检测信道为空闲,则判定获取到成功完成LBT过程的载波的使用权;或者,第十七判定子单元,设置为在载波集合中选定的多个载波上执行指定的LBT Cat4机制,在剩余的载波上执行快速的LBT机制的情况下,若各个载波上按照各自的LBT机制进行信道的竞争接入,如果在开始传输时刻之前完成对应的LBT过程的载波上,则传输设备判定获取到成功完成LBT过程的载波的使用权;或者,第十八判定子单元,设置为在载波集合中选定的多个载波上执行指定的LBT Cat4机制,在剩余的载波上执行快速的LBT机制的情况下,若各个载波上按照各自的LBT机制进行信道的竞争接入,如果在开始传输时刻之前载波上未完成LBT过程,则若各载波上当前随机回退值N满足预设的门限值的载波,或者,最后一次或最后连续若干次CCA检测信道为空闲,则传输设备判定获取到成功完成LBT过程的载波的使用权;或者,第十九判定子单元,设置为在载波集合中选定的多个载波上执行指定的LBT Cat4机制,在剩余的载波上执行快速的LBT机制的情况下,若有载波上的随机回退值N满足第一门限值时,则其他载波上的随机回退值N调整到第一门限值;若调整随机回退值N后的载波上的随机回退值N满足第二门限值时,则其他载波上的随机回退值N调整到第二门限值,以此类推,在开始传输时刻开始之前,如果随机回退值N递减到0或完成对应LBT过程的载波,或,如果在开始传输时刻之前载波上未完成LBT过程,则若载波上当前随机回退值N满足预设的门限值的载波,或者,最后一次或最后连续若干次CCA检测信道为空闲,则传输设备判定获取到成功完成LBT过程的载波的使用权。
进一步地,装置还包括:第一执行模块,设置为在按照先听后说LBT机制竞争接入信道失败的载波,或,载波上待传输的数据包的情况下,依据预设方式执行处理流程;其中,预设方式包括之一:放弃执行LBT失败的载波,或者,放弃在载波上传输;对执行LBT失败的载波上的数据包进行重传;在竞争成功的载波上的备选的资源上传输数据包;使用备用的非授权载波;复用其他载波上相同资源一起传输各自的数据包;其中,不同数据在同一个资源上发,若秩指示RI大于2,则可以复用该资源进行传输,或是通过随机接入无线网络临时标识RNTI或循环移位CS编码在同一资源上发送不同的数据块。
实施例五
图3是根据本发明实施例的一种多载波的竞争接入系统的结构框图,如图3所示,包括: 基站和终端,基站与终端通信连接,其中,
终端为图2所示的另一种多载波的竞争接入装置。
需要说明的是,上述各个模块是可以通过软件或硬件来实现的,对于后者,可以通过以下方式实现,但不限于此:上述模块均位于同一处理器中;或者,上述模块分别位于多个处理器中。
本发明的实施例还提供了一种存储介质。可选地,在本实施例中,上述存储介质可以被设置为存储设置为执行以下步骤的程序代码:
S1,依据第一预设条件获取执行先听后说LBT机制的载波集合;
S2,根据预设的调度方式,在载波集合中依据第二预设条件执行信道的竞争接入。
可选地,存储介质还被设置为存储设置为执行以下步骤的程序代码:
S1,在调度方式为自载波调度方式的情况下,在载波集合中的每个载波上按照相同的先听后说LBT机制执行信道的竞争接入包括:用户设备UE在每个载波上均按照指定的先听后说LBT机制进行信道的竞争接入;指定的先听后说LBT机制包括以下之一:LBT Cat2机制;增强型的LBT Cat2机制;配置的设置为执行LBT过程的时间长但随机回退值N小的LBT Cat4机制;快速的先听后说LBT机制;其中,快速的先听后说LBT机制包括以下之一:延时期+扩展干净信道评估defer period+ECCA过程,或,直接扩展干净信道评估ECCA过程。
可选地,在本实施例中,上述存储介质可以包括但不限于:U盘、只读存储器(ROM,Read-Only Memory)、随机存取存储器(RAM,Random Access Memory)、移动硬盘、磁碟或者光盘等各种可以存储程序代码的介质。
可选地,在本实施例中,处理器根据存储介质中已存储的程序代码执行在指定的先听后说机制为LBT Cat2机制的情况下,在载波集合中的每个载波上按照的LBT Cat2机制进行信道的竞争接入时,获取信道的使用权包括:在每个载波上按照LBT Cat2机制执行信道的竞争接入,对于成功完成LBT Cat2机制的载波,判定获取到成功完成LBT Cat2机制载波的使用权;或者,在K个载波中有S个载波上执行LBT Cat2机制成功,在剩余载波上执行LBT Cat2机制失败时,若成功执行LBT Cat2机制的载波总数不满足特定的载波数量,则按照预设方式处理;其中,预设方式包括:判定传输设备未获取到载波的使用权;或,在执行LBT Cat2机制失败的载波中随机选择载波来满足特定的载波数量;或,直接评定在执行LBT Cat2机制失败的载波上,传输设备获取到载波的使用权;若成功执行LBT Cat2机制的载波总数满足特定的载波数量,则传输设备使用或认为获取到成功完成LBT Cat2机制载波的使用权。
可选地,在本实施例中,处理器根据存储介质中已存储的程序代码执行成功执行LBT Cat2机制包括:若检测到信道从忙到闲,且检测信道连续空闲的时间大于和/或等于预设空闲信道评估CCA检测时长,或者,检测信道连续空闲的时间大于和/或等于预设空闲信道评估CCA检测时长,则判定传输设备获取到非授权载波的使用权,或,完成LBT Cat2过程。
可选地,在本实施例中,处理器根据存储介质中已存储的程序代码执行在指定的先听后说机制为增强型的LBT Cat2机制,空闲信道评估CCA检测时长的检测起始位置包括固定CCA检测起始位置或随机选择CCA检测起始位置的情况下,在每个载波上均按照指定的先听后说LBT机制进行信道的竞争接入包括:在每个载波上按照共同的固定的CCA检测起始位置进行信道的竞争接入;或,在每个载波上按照独立的固定的CCA检测起始位置进行信道的竞争接入;或,在每个载波上按照共同的随机选择的CCA检测起始位置进行信道的竞争接入;或,在每个载波上按照独立的随机选择的CCA检测起始位置进行信道的竞争接入。
可选地,在本实施例中,处理器根据存储介质中已存储的程序代码执行当CCA的检测起始位置为固定CCA检测起始位置时,预先将竞争接入时间区域划分为K个CCA检测时间段;在K个CCA检测时间段上,各个传输设备固定的从K个不同的时间段的一个固定的起点开始进行CCA检测。
进一步地,在本实施例中,处理器根据存储介质中已存储的程序代码执行不同传输设备在K个不同时间段上有不同的固定CCA检测起点;或者,不同传输设备在K个不同时间段上有相同的固定CCA检测起点。
可选地,在本实施例中,处理器根据存储介质中已存储的程序代码执行当CCA的检测起始位置为随机CCA检测起始位置时,预先将竞争接入时间区域划分为K个CCA检测时间段;在K个CCA检测时间段上传输设备随机选择各自的CCA检测时间段的起点作为CCA检测的起点;或者,传输设备在竞争接入时间区域上随机选择各自的CCA检测起点;或者,传输设备在K个CCA检测时间段上随机选择各自的CCA检测时间段且在CCA检测时间段内随机选择CCA检测起点;或者,传输设备在K个CCA检测时间段上固定一个CCA检测时间段,且在CCA检测时间段内随机选择CCA检测起点。
可选地,在本实施例中,处理器根据存储介质中已存储的程序代码执行若检测信道从忙到闲,且连续检测信道空闲时间大于和/或等于CCA检测时长,或者,检测信道连续空闲的时间大于和/或等于预设空闲信道评估CCA检测时长,则判定传输设备获取到非授权载波的使用权,或,完成增强型的LBT Cat2过程。
可选地,在本实施例中,处理器根据存储介质中已存储的程序代码执行在指定的先听后说LBT机制为快速的先听后说LBT机制的情况下,在每个载波上均按照指定的先听后说LBT机制进行信道的竞争接入包括:在每个载波上按照快速的先听后说LBT机制完成信道的竞争接入的情况下,判定获取到成功完成LBT过程的载波使用权;或者,在每个载波上按照快速的先听后说LBT机制执行信道的竞争接入,成功完成快速的先听后说LBT机制的载波,传输设备判定获取到成功完成快速的先听后说LBT过程的载波使用权;或者,未完成快速的先听后说LBT机制的载波上,传输设备认为该载波不可用,或者,对于未完成快速的先听后说LBT机制的载波,若随机回退值N满足特定的门限值,则传输设备判定获取到成功完成快速的先听后说LBT过程的载波使用权;若随机回退值N不满足特定的门限值,则判定未获取到该载波使用权,或放弃载波;或者,在每个载波上按照快速的先听后说LBT机制执行信道的竞争 接入,若最后一次或最后连续若干次CCA检测到信道空闲,则传输设备判定获取到成功完成快速的先听后说LBT过程的载波使用权;或者,若存在一个即将完成快速的先听后说LBT机制的载波,其他载波上则停止当前的LBT过程,立刻按照LBT Cat2机制执行信道的竞争接入,在开始传输时刻之前完成对应的LBT过程的载波,则传输设备判定获取到载波使用权。
可选地,在本实施例中,处理器根据存储介质中已存储的程序代码执行在自载波调度方式下,在基站在每个载波上按照LBT Cat4机制执行信道的竞争接入的情况下,在载波集合中的每个载波上按照不同的先听后说LBT机制执行信道的竞争接入包括:在选定的一个或是多个载波上执行LBT Cat2机制,在载波集合中的其他载波上不执行LBT机制;在选定的一个或是多个载波上执行快速LBT机制,在载波集合中的其他载波上不执行LBT机制;在选定的一个或是多个载波上执行快速的LBT机制,在一个或多个载波上即将完成快速LBT过程时,在载波集合中的其他载波上执行LBT Cat2机制。
可选地,在本实施例中,处理器根据存储介质中已存储的程序代码执行在选定的一个或多个载波上即将完成快速的LBT机制时,在载波集合中的其他载波上执行LBT Cat2机制包括:当一个载波上执行快速的LBT过程中的随机回退值N均递减到特定门限值时,载波集合中的其他载波开始执行LBT Cat2机制;或,当多个载波上各自执行快速的LBT过程中的随机回退值N均递减到特定门限值时,载波集合中的其他载波开始执行LBT Cat2机制;其中,N值先递减到特定门限值的载波上可执行自延迟操作;或,当多个载波上执行快速的LBT过程同时检测到信道空闲时,各个载波上的随机回退值N进行递减操作,且N值递减到特定门限值时,载波集合中的其他载波开始执行LBT Cat2机制。
可选地,在本实施例中,处理器根据存储介质中已存储的程序代码执行在预设的调度方式为自载波调度方式下,在基站选定的主载波上按照LBT Cat4机制,辅载波上按照LBT Cat2机制进行信道的竞争接入的情况下,在载波集合中依据第二预设条件执行信道的竞争接入包括:在基站指示的主载波上执行LBT Cat2机制,在基站侧指示的辅载波上执行简化的LBT Cat4或快速的LBT机制;或,在载波集合中的每个载波上均执行LBT Cat2机制;或,在载波集合中的每个载波上执行配置的用于执行LBT过程的时间长但随机回退值N相对小的LBT Cat4或快速的LBT机制;或,在基站执行LBT Cat4的载波上,不执行LBT机制,在基站执行LBT Cat2的载波上,执行配置的用于执行LBT过程的时间长但随机回退值N相对小的LBT Cat4或执行快速LBT过程;或,在基站执行LBT成功的载波上,若下行传输burst和上行传输burst之间的间隙Gap小于预设值,则不执行LBT机制,或,执行LBT Cat2机制。
可选地,在本实施例中,处理器根据存储介质中已存储的程序代码执行在预设的调度方式为跨载波调度方式下,在载波集合中依据第二预设条件执行信道的竞争接入包括:在载波集合中的每个载波上执行指定的LBT Cat4机制;其中,指定的LBT Cat4机制是指最大竞争窗大小比自载波调度执行LBT Cat4的竞争窗大,且比下行执行LBT Cat4机制的竞争窗小的有随机回退的LBT过程;或者,在载波集合中的每个载波上执行快速的LBT机制;其中:快速的LBT机制包括:defer period+ECCA或直接ECCA过程;或者,在载波集合中选定的一个 或多个载波上执行指定的LBT Cat4机制即将成功时,在剩余的载波上执行LBT Cat2机制;或者,在载波集合中选定的一个或多个载波上执行特定的LBT Cat4机制,剩余的载波上执行快速的LBT机制;或者,在载波集合中选定的一个或多个载波上执行快速的LBT机制,剩余的载波上执行LBT Cat2机制.
可选地,在本实施例中,处理器根据存储介质中已存储的程序代码执行在载波集合中的每个载波上执行指定的LBT Cat4机制或快速的LBT机制的情况下,确定获取信道使用权包括:在载波集合中的每个载波上均完成指定的LBT Cat4机制或快速的LBT机制的情况下,判定获取到成功完成指定的LBT Cat4机制或快速的LBT机制的载波的使用权;或,在载波集合中,即将完成指定的LBT Cat4机制或快速的LBT机制的载波,若当前随机回退值值N满足预设的门限值时,则停止其他正在执行指定的LBT Cat4机制或快速的LBT机制的载波上的LBT过程,立刻执行LBT Cat2机制;在每个载波上完成对应LBT过程的载波的情况下,则传输设备判定获取到成功完成LBT过程的载波的使用权;或,在载波集合中部分载波上完成指定的LBT Cat4机制或快速的LBT机制,且未完成指定的LBT Cat4过程或快速的LBT机制的载波上当前的随机回退值N满足预设的门限值的情况下,判定获取到成功完成LBT过程的载波的使用权;或,若在开始传输时刻之前未完成指定LBT Cat4过程或快速的LBT机制的载波上的最后一次或最后连续若干次的CCA检测信道空闲,则传输设备判定获取的载波的使用权。
可选地,在本实施例中,处理器根据存储介质中已存储的程序代码执行在载波集合中选定的一个或多个载波上执行指定的LBT Cat4机制即将成功时,在剩余的载波上执行LBT Cat2机制的情况下,确定获取信道使用权包括:在载波集合中选定的一个载波上执行指定的LBT Cat4机制即将成功时,在剩余的载波上执行LBT Cat2机制,当每个载波上均完成各自对应的LBT过程时,判定获取到成功完成LBT过程的载波的使用权;或者,在载波集合中选定的多个载波上均执行指定的LBT Cat4机制即将同时成功时,在剩余的载波上执行LBT Cat2机制,当每个载波上均完成各自对应的LBT过程时,判定获取到成功完成LBT过程的载波的使用权;或者,在载波集合中选定的多个载波上执行指定的LBT Cat4机制,如果有至少一个载波上即将完成指定的LBT Cat4机制,在剩余的载波上执行LBT Cat2机制,当每个载波上均完成各自对应的LBT过程时,判定获取到成功完成LBT过程的载波的使用权。
可选地,在本实施例中,处理器根据存储介质中已存储的程序代码执行在载波集合中选定的一个或多个载波上执行特定的LBT Cat4机制,剩余的载波上执行快速的LBT机制的情况下,确定获取信道使用权包括:在载波集合中选定的一个载波上执行指定的LBT Cat4机制,在剩余的载波上执行快速的LBT机制的情况下,若各个载波上在传输开始之前完成对应的LBT过程,则判定获取到成功完成LBT过程的载波的使用权;或者,在载波集合中选定的一个载波上执行指定的LBT Cat4机制,在剩余的载波上执行快速的LBT机制的情况下,若各个载波上在传输开始之前有部分载波上未完成对应的LBT过程,则若未完成LBT过程的载波上的当前随机回退值N满足预设的门限值,则判定获取到成功完成LBT过程的载波的使用权;或者,在载波集合中选定的一个载波上执行指定的LBT Cat4机制,在剩余的载波上执行快速的LBT机制的情况下,若各个载波上在传输开始之前有部分载波上未完成对应的LBT过程, 则若未完成LBT过程的载波上的最后一次或最后连续若干次CCA检测到信道为空闲,则判定获取到成功完成LBT过程的载波的使用权;或者,在载波集合中选定的多个载波上执行指定的LBT Cat4机制,在剩余的载波上执行快速的LBT机制的情况下,若有一个载波上对应的LBT过程的随机回退值N满足特定的门限值,则剩余载波上停止各自的LBT过程,立刻执行LBT Cat2机制;若各个载波在传输开始之前完成对应的LBT过程,则判定获取到成功完成LBT过程的载波的使用权;或者,在载波集合中选定的多个载波上执行指定的LBT Cat4机制,在剩余的载波上执行快速的LBT机制的情况下,若在传输开始之前有载波先完成对应的LBT过程,则可以发送预留信号,或者执行自延迟操作;未完成对应的LBT过程的载波继续执行CCA检测,若在传输开始时刻依然未完成LBT过程的载波,判断载波上当前随机回退值N满足特定的门限值或最后一次或最后连续若干次CCA检测信道为空闲,则判定获取到成功完成LBT过程的载波的使用权;或者,在载波集合中选定的多个载波上执行指定的LBT Cat4机制,在剩余的载波上执行快速的LBT机制的情况下,若各个载波上按照各自的LBT机制进行信道的竞争接入,如果在开始传输时刻之前完成对应的LBT过程的载波上,则传输设备判定获取到成功完成LBT过程的载波的使用权;或者,在载波集合中选定的多个载波上执行指定的LBT Cat4机制,在剩余的载波上执行快速的LBT机制的情况下,若各个载波上按照各自的LBT机制进行信道的竞争接入,如果在开始传输时刻之前载波上未完成LBT过程,则若各载波上当前随机回退值N满足预设的门限值的载波,或者,最后一次或最后连续若干次CCA检测信道为空闲,则传输设备判定获取到成功完成LBT过程的载波的使用权;或者,在载波集合中选定的多个载波上执行指定的LBT Cat4机制,在剩余的载波上执行快速的LBT机制的情况下,若有载波上的随机回退值N满足第一门限值时,则其他载波上的随机回退值N调整到第一门限值;若调整随机回退值N后的载波上的随机回退值N满足第二门限值时,则其他载波上的随机回退值N调整到第二门限值,以此类推,在开始传输时刻开始之前,如果随机回退值N递减到0或完成对应LBT过程的载波,或,如果在开始传输时刻之前载波上未完成LBT过程,则若载波上当前随机回退值N满足预设的门限值的载波,或者,最后一次或最后连续若干次CCA检测信道为空闲,则传输设备判定获取到成功完成LBT过程的载波的使用权。
可选地,在本实施例中,处理器根据存储介质中已存储的程序代码执行在按照先听后说LBT机制竞争接入信道失败的载波,或,载波上待传输的数据包的情况下,依据预设方式执行处理流程;其中,预设方式包括之一:放弃执行LBT失败的载波,或者,放弃在载波上传输;对执行LBT失败的载波上的数据包进行重传;在竞争成功的载波上的备选的资源上传输数据包;使用备用的非授权载波;复用其他载波上相同资源一起传输各自的数据包;其中,不同数据在同一个资源上发,若秩指示RI大于2,则可以复用该资源进行传输,或是通过随机接入无线网络临时标识RNTI或循环移位CS编码在同一资源上发送不同的数据块。
可选地,本实施例中的具体示例可以参考上述实施例及可选实施方式中所描述的示例,本实施例在此不再赘述。
显然,本领域的技术人员应该明白,上述的本发明的各模块或各步骤可以用通用的计算装置来实现,它们可以集中在单个的计算装置上,或者分布在多个计算装置所组成的网络上, 可选地,它们可以用计算装置可执行的程序代码来实现,从而,可以将它们存储在存储装置中由计算装置来执行,并且在某些情况下,可以以不同于此处的顺序执行所示出或描述的步骤,或者将它们分别制作成各个集成电路模块,或者将它们中的多个模块或步骤制作成单个集成电路模块来实现。这样,本发明不限制于任何指定的硬件和软件结合。
以上所述仅为本发明的优选实施例而已,并不用于限制本发明,对于本领域的技术人员来说,本发明可以有各种更改和变化。凡在本发明的精神和原则之内,所作的任何修改、等同替换、改进等,均应包含在本发明的保护范围之内。
工业实用性
如上所述,本发明实施例提供的一种多载波的竞争接入方法、装置及系统具有以下有益效果:提升上行数据传输性能在高负载的运行状态。

Claims (45)

  1. 一种多载波的竞争接入方法,包括:
    依据第一预设条件获取执行先听后说LBT机制的载波集合;
    根据预设的调度方式,在所述载波集合中依据第二预设条件执行信道的竞争接入。
  2. 根据权利要求1所述的方法,其中,所述第一预设条件包括:
    基站指示;或者,基站指示和用户设备UE选择结合;或者,用户设备UE自主选择;或者,预定义。
  3. 根据权利要求1所述的方法,其中,所述预设的调度方式包括:自载波调度方式,或,跨载波调度方式。
  4. 根据权利要求3所述的方法,其中,所述第二预设条件包括:
    在所述载波集合中的每个载波上按照相同的先听后说LBT机制执行信道的竞争接入;或,在所述载波集合中的每个载波上按照不同的先听后说LBT机制执行信道的竞争接入。
  5. 根据权利要求4所述的方法,其中,在所述调度方式为所述自载波调度方式的情况下,在所述载波集合中的每个载波上按照相同的先听后说LBT机制执行信道的竞争接入包括:
    用户设备UE在每个载波上均按照指定的先听后说LBT机制进行信道的竞争接入;
    所述指定的先听后说LBT机制包括以下之一:LBT Cat2机制;增强型的LBT Cat2机制;配置的用于执行LBT过程的时间长但随机回退值N小的LBT Cat4机制;快速的先听后说LBT机制;
    其中,所述快速的先听后说LBT机制包括以下之一:延时期+扩展干净信道评估defer period+ECCA过程,或,直接扩展干净信道评估ECCA过程。
  6. 根据权利要求5所述的方法,其中,当下行传输burst和上行传输burst之间的间隙Gap时长小于或等于预设的门限值时,用户设备选择是否执行上行LBT机制或执行LBT Cat2机制。
  7. 根据权利要求5所述的方法,其中,在所述指定的先听后说机制为所述LBT Cat2机制的情况下,在所述载波集合中的每个载波上按照所述的LBT Cat2机制进行信道的竞争接入时,获取信道的使用权包括:
    在每个载波上按照所述LBT Cat2机制执行信道的竞争接入,对于成功完成所述LBT  Cat2机制的载波,判定获取到成功完成所述LBT Cat2机制载波的使用权;或者,
    在K个载波中有S个载波上执行所述LBT Cat2机制成功,在剩余载波上执行所述LBT Cat2机制失败时,若成功执行所述LBT Cat2机制的载波总数不满足特定的载波数量,则按照预设方式处理;其中,所述预设方式包括:判定传输设备未获取到载波的使用权;或,在执行所述LBT Cat2机制失败的载波中随机选择载波来满足特定的载波数量;或,直接评定在执行所述LBT Cat2机制失败的载波上,传输设备获取到载波的使用权;若成功执行所述LBT Cat2机制的载波总数满足特定的载波数量,则传输设备使用或认为获取到成功完成所述LBT Cat2机制载波的使用权。
  8. 根据权利要求7所述的方法,其中,所述成功执行所述LBT Cat2机制包括:若检测到信道从忙到闲,且所述检测信道连续空闲的时间大于和/或等于预设空闲信道评估CCA检测时长,或者,检测信道连续空闲的时间大于和/或等于预设空闲信道评估CCA检测时长,则判定传输设备获取到非授权载波的使用权,或,完成LBT Cat2过程。
  9. 根据权利要求5所述的方法,其中,在所述指定的先听后说机制为所述增强型的LBT Cat2机制,空闲信道评估CCA检测时长的检测起始位置包括固定CCA检测起始位置或随机选择CCA检测起始位置的情况下,在每个载波上均按照指定的先听后说LBT机制进行信道的竞争接入包括:
    在每个载波上按照共同的所述固定的CCA检测起始位置进行信道的竞争接入;或,
    在每个载波上按照独立的所述固定的CCA检测起始位置进行信道的竞争接入;或,
    在每个载波上按照共同的所述随机选择的CCA检测起始位置进行信道的竞争接入;或,
    在每个载波上按照独立的所述随机选择的CCA检测起始位置进行信道的竞争接入。
  10. 根据权利要求9所述的方法,其中,当所述CCA的检测起始位置为所述固定CCA检测起始位置时,预先将竞争接入时间区域划分为K个CCA检测时间段;在所述K个CCA检测时间段上,各个传输设备固定的从K个不同的时间段的一个固定的起点开始进行CCA检测。
  11. 根据权利要求10所述的方法,其中,所述不同传输设备在K个不同时间段上有不同的固定CCA检测起点;或者,所述不同传输设备在K个不同时间段上有相同的固定CCA检测起点。
  12. 根据权利要求5或9所述的方法,其中,当所述CCA的检测起始位置为所述随机CCA检测起始位置时,预先将竞争接入时间区域划分为K个CCA检测时间段;在所述K个CCA检测时间段上传输设备随机选择各自的CCA检测时间段的起点作为所述CCA检测的起点;或者,传输设备在竞争接入时间区域上随机选择各自的CCA检测起点;或者,传输设备在所述K个CCA检测时间段上随机选择各自的CCA检测时间段且在CCA检测 时间段内随机选择CCA检测起点;或者,传输设备在所述K个CCA检测时间段上固定一个CCA检测时间段,且在CCA检测时间段内随机选择CCA检测起点。
  13. 根据权利要求9至12所述的方法,其中,
    若传输设备检测信道从忙到闲,且连续检测信道空闲时间大于和/或等于所述CCA检测时长,或者,检测信道连续空闲的时间大于和/或等于预设空闲信道评估CCA检测时长,则判定传输设备获取到非授权载波的使用权,或,完成增强型的LBT Cat2过程。
  14. 根据权利要求5所述的方法,其中,在所述指定的先听后说LBT机制为所述快速的先听后说LBT机制的情况下,在每个载波上均按照指定的先听后说LBT机制进行信道的竞争接入包括:
    在每个载波上按照所述快速的先听后说LBT机制完成信道的竞争接入的情况下,判定获取到成功完成LBT过程的载波使用权;或者,
    在每个载波上按照所述快速的先听后说LBT机制执行信道的竞争接入,成功完成所述快速的先听后说LBT机制的载波,传输设备判定获取到成功完成所述快速的先听后说LBT过程的载波使用权;或者,未完成所述快速的先听后说LBT机制的载波上,传输设备认为该载波不可用,或者,对于未完成所述快速的先听后说LBT机制的载波,若随机回退值N满足特定的门限值,则传输设备判定获取到成功完成所述快速的先听后说LBT过程的载波使用权;若随机回退值N不满足特定的门限值,则判定未获取到该载波使用权,或放弃所述载波;或者,
    在每个载波上按照所述快速的先听后说LBT机制执行信道的竞争接入,若最后一次或最后连续若干次CCA检测到信道空闲,则传输设备判定获取到成功完成所述快速的先听后说LBT过程的载波使用权;或者,
    若存在一个即将完成所述快速的先听后说LBT机制的载波,其他载波上则停止当前的LBT过程,立刻按照所述LBT Cat2机制执行信道的竞争接入,在开始传输时刻之前完成对应的LBT过程的载波,则传输设备判定获取到载波使用权。
  15. 根据权利要求4所述的方法,其中,在自载波调度方式下,在基站在每个载波上按照LBT Cat4机制执行信道的竞争接入的情况下,在所述载波集合中的每个载波上按照不同的先听后说LBT机制执行信道的竞争接入包括:
    在选定的一个或是多个载波上执行LBT Cat2机制,在所述载波集合中的其他载波上不执行LBT机制;
    在选定的一个或是多个载波上执行快速LBT机制,在所述载波集合中的其他载波上不执行LBT机制;
    在选定的一个或是多个载波上执行快速的LBT机制,在一个或多个载波上即将完成 快速LBT过程时,在所述载波集合中的其他载波上执行LBT Cat2机制。
  16. 根据权利要求15所述的方法,其中,所述在选定的一个或多个载波上即将完成快速的LBT机制时,在所述载波集合中的其他载波上执行LBT Cat2机制包括:
    当所述一个载波上执行所述快速的LBT过程中的随机回退值N均递减到特定门限值时,所述载波集合中的其他载波开始执行所述LBT Cat2机制;或,
    当所述多个载波上各自执行所述快速的LBT过程中的随机回退值N均递减到特定门限值时,所述载波集合中的其他载波开始执行所述LBT Cat2机制;其中,N值先递减到特定门限值的载波上可执行自延迟操作;或,
    当所述多个载波上执行所述快速的LBT过程同时检测到信道空闲时,各个载波上的随机回退值N进行递减操作,且N值递减到特定门限值时,所述载波集合中的其他载波开始执行所述LBT Cat2机制。
  17. 根据权利要求4所述的方法,其中,在所述预设的调度方式为所述自载波调度方式下,在基站选定的主载波上按照LBT Cat4机制,辅载波上按照LBT Cat2机制进行信道的竞争接入的情况下,在所述载波集合中依据第二预设条件执行信道的竞争接入包括:
    在所述基站指示的主载波上执行LBT Cat2机制,在所述基站侧指示的辅载波上执行简化的LBT Cat4或快速的LBT机制;或,
    在所述载波集合中的每个载波上均执行LBT Cat2机制;或,
    在所述载波集合中的每个载波上执行配置的用于执行LBT过程的时间长但随机回退值N相对小的LBT Cat4或快速的LBT机制;或,
    在所述基站执行LBT Cat4的载波上,不执行LBT机制,在所述基站执行LBT Cat2的载波上,执行配置的用于执行LBT过程的时间长但随机回退值N相对小的LBT Cat4或执行快速LBT过程;或,
    在所述基站执行LBT成功的载波上,若下行传输burst和上行传输burst之间的间隙Gap小于预设值,则不执行LBT机制,或,执行LBT Cat2机制。
  18. 根据权利要求4所述的方法,其中,在所述预设的调度方式为跨载波调度方式下,在所述载波集合中依据第二预设条件执行信道的竞争接入包括:
    在所述载波集合中的每个载波上执行指定的LBT Cat4机制;其中,所述指定的LBT Cat4机制是指最大竞争窗大小比自载波调度执行LBT Cat4的竞争窗大,且比下行执行LBT Cat4机制的竞争窗小的有随机回退的LBT过程;或者,
    在所述载波集合中的每个载波上执行快速的LBT机制;其中:快速的LBT机制包括:defer period+ECCA或直接ECCA过程;或者,
    在所述载波集合中选定的一个或多个载波上执行指定的LBT Cat4机制即将成功时,在剩余的载波上执行LBT Cat2机制;或者,
    在所述载波集合中选定的一个或多个载波上执行特定的LBT Cat4机制,剩余的载波上执行快速的LBT机制;或者,
    在所述载波集合中选定的一个或多个载波上执行快速的LBT机制,剩余的载波上执行LBT Cat2机制。
  19. 根据权利要求18所述的方法,其中,在所述载波集合中的每个载波上执行所述指定的LBT Cat4机制或所述快速的LBT机制的情况下,确定获取信道使用权包括:
    在所述载波集合中的每个载波上均完成所述指定的LBT Cat4机制或所述快速的LBT机制的情况下,判定获取到成功完成所述指定的LBT Cat4机制或所述快速的LBT机制的载波的使用权;或,
    在所述载波集合中,即将完成所述指定的LBT Cat4机制或所述快速的LBT机制的载波,若当前随机回退值值N满足预设的门限值时,则停止其他正在执行所述指定的LBT Cat4机制或所述快速的LBT机制的载波上的LBT过程,立刻执行LBT Cat2机制;在每个载波上完成对应LBT过程的载波的情况下,则传输设备判定获取到成功完成LBT过程的载波的使用权;或,
    在所述载波集合中部分载波上完成所述指定的LBT Cat4机制或所述快速的LBT机制,且未完成所述指定的LBT Cat4过程或所述快速的LBT机制的载波上当前的随机回退值N满足预设的门限值的情况下,判定获取到成功完成LBT过程的载波的使用权;或,
    若在开始传输时刻之前未完成指定LBT Cat4过程或所述快速的LBT机制的载波上的最后一次或最后连续若干次的CCA检测信道空闲,则传输设备判定获取的载波的使用权。
  20. 根据权利要求18所述的方法,其中,在所述载波集合中选定的一个或多个载波上执行指定的LBT Cat4机制即将成功时,在剩余的载波上执行LBT Cat2机制的情况下,确定获取信道使用权包括:
    在所述载波集合中选定的一个载波上执行所述指定的LBT Cat4机制即将成功时,在剩余的载波上执行所述LBT Cat2机制,当每个载波上均完成各自对应的LBT过程时,判定获取到成功完成LBT过程的载波的使用权;或者,
    在所述载波集合中选定的多个载波上均执行所述指定的LBT Cat4机制即将同时成功时,在剩余的载波上执行所述LBT Cat2机制,当每个载波上均完成各自对应的LBT过程时,判定获取到成功完成LBT过程的载波的使用权;或者,
    在所述载波集合中选定的多个载波上执行所述指定的LBT Cat4机制,如果有至少一 个载波上即将完成所述指定的LBT Cat4机制,在剩余的载波上执行所述LBT Cat2机制,当每个载波上均完成各自对应的LBT过程时,判定获取到成功完成LBT过程的载波的使用权。
  21. 根据权利要求18所述的方法,其中,在所述载波集合中选定的一个或多个载波上执行特定的LBT Cat4机制,剩余的载波上执行快速的LBT机制的情况下,确定获取信道使用权包括:
    在所述载波集合中选定的一个载波上执行所述指定的LBT Cat4机制,在剩余的载波上执行所述快速的LBT机制的情况下,若各个载波上在传输开始之前完成对应的LBT过程,则判定获取到成功完成LBT过程的载波的使用权;或者,
    在所述载波集合中选定的一个载波上执行所述指定的LBT Cat4机制,在剩余的载波上执行所述快速的LBT机制的情况下,若各个载波上在传输开始之前有部分载波上未完成对应的LBT过程,则若未完成LBT过程的载波上的当前随机回退值N满足预设的门限值,则判定获取到成功完成LBT过程的载波的使用权;或者,
    在所述载波集合中选定的一个载波上执行所述指定的LBT Cat4机制,在剩余的载波上执行所述快速的LBT机制的情况下,若各个载波上在传输开始之前有部分载波上未完成对应的LBT过程,则若未完成LBT过程的载波上的最后一次或最后连续若干次CCA检测到信道为空闲,则判定获取到成功完成LBT过程的载波的使用权;或者,
    在所述载波集合中选定的多个载波上执行所述指定的LBT Cat4机制,在剩余的载波上执行所述快速的LBT机制的情况下,若有一个载波上对应的LBT过程的随机回退值N满足特定的门限值,则剩余载波上停止各自的LBT过程,立刻执行LBT Cat2机制;若各个载波在传输开始之前完成对应的LBT过程,则判定获取到成功完成LBT过程的载波的使用权;或者,
    在所述载波集合中选定的多个载波上执行所述指定的LBT Cat4机制,在剩余的载波上执行所述快速的LBT机制的情况下,若在传输开始之前有载波先完成对应的LBT过程,则可以发送预留信号,或者执行自延迟操作;未完成对应的LBT过程的载波继续执行CCA检测,若在传输开始时刻依然未完成LBT过程的载波,判断所述载波上当前随机回退值N满足特定的门限值或最后一次或最后连续若干次CCA检测信道为空闲,则判定获取到成功完成LBT过程的载波的使用权;或者,
    在所述载波集合中选定的多个载波上执行所述指定的LBT Cat4机制,在剩余的载波上执行所述快速的LBT机制的情况下,若各个载波上按照各自的LBT机制进行信道的竞争接入,如果在开始传输时刻之前完成对应的LBT过程的载波上,则传输设备判定获取到成功完成LBT过程的载波的使用权;或者,
    在所述载波集合中选定的多个载波上执行所述指定的LBT Cat4机制,在剩余的载波 上执行所述快速的LBT机制的情况下,若各个载波上按照各自的LBT机制进行信道的竞争接入,如果在开始传输时刻之前载波上未完成LBT过程,则若各载波上当前随机回退值N满足预设的门限值的载波,或者,最后一次或最后连续若干次CCA检测信道为空闲,则传输设备判定获取到成功完成LBT过程的载波的使用权;或者,
    在所述载波集合中选定的多个载波上执行所述指定的LBT Cat4机制,在剩余的载波上执行所述快速的LBT机制的情况下,若有载波上的随机回退值N满足第一门限值时,则其他载波上的随机回退值N调整到第一门限值;若调整随机回退值N后的载波上的随机回退值N满足第二门限值时,则其他载波上的随机回退值N调整到第二门限值,以此类推,在开始传输时刻开始之前,如果随机回退值N递减到0或完成对应LBT过程的载波,或,如果在开始传输时刻之前载波上未完成LBT过程,则若载波上当前随机回退值N满足预设的门限值的载波,或者,最后一次或最后连续若干次CCA检测信道为空闲,则传输设备判定获取到成功完成LBT过程的载波的使用权。
  22. 根据权利要求4所述的方法,其中,所述方法还包括:
    在按照所述先听后说LBT机制竞争接入信道失败的载波,或,所述载波上有待传输的数据包的情况下,依据预设方式执行处理流程;其中,所述预设方式包括之一:
    放弃执行LBT失败的载波,或者,放弃在所述载波上传输;
    对执行所述LBT失败的载波上的数据包进行重传;
    在竞争成功的载波上的备选的资源上传输数据包;
    使用备用的非授权载波;
    复用其他载波上相同资源一起传输各自的数据包;其中,不同数据在同一个资源上发,若秩指示RI大于2,则可以复用该资源进行传输,或是通过随机接入无线网络临时标识RNTI或循环移位CS编码在同一资源上发送不同的数据块。
  23. 一种多载波的竞争接入装置,包括:
    获取模块,设置为依据第一预设条件获取执行先听后说LBT机制的载波集合;
    接入模块,设置为根据预设的调度方式,在所述载波集合中依据第二预设条件执行信道的竞争接入。
  24. 根据权利要求23所述的装置,其中,所述第一预设条件包括:基站指示;或者,基站指示和用户设备UE选择结合;或者,用户设备UE自主选择;或者,预定义。
  25. 根据权利要求23所述的装置,其中,所述预设的调度方式包括:自载波调度方式,或,跨载波调度方式。
  26. 根据权利要求25所述的装置,其中,所述第二预设条件包括:在所述载波集合中的每个 载波上按照相同的先听后说LBT机制执行信道的竞争接入;或,在所述载波集合中的每个载波上按照不同的先听后说LBT机制执行信道的竞争接入。
  27. 根据权利要求26所述的装置,其中,所述接入模块包括:
    第一接入单元,设置为在所述调度方式为所述自载波调度方式的情况下,用户设备UE在每个载波上均按照指定的先听后说LBT机制进行信道的竞争接入;所述指定的先听后说LBT机制包括以下之一:LBT Cat2机制;增强型的LBT Cat2机制;配置的用于执行LBT过程的时间长但随机回退值N小的LBT Cat4机制;快速的先听后说LBT机制;其中,所述快速的先听后说LBT机制包括以下之一:延时期+扩展干净信道评估defer period+ECCA过程,或,直接扩展干净信道评估ECCA过程。
  28. 根据权利要求27所述的装置,其中,执行单元,设置为当下行传输burst和上行传输burst之间的间隙Gap时长小于或等于预设的门限值时,选择是否执行上行LBT机制或执行LBT Cat2机制。
  29. 根据权利要求27所述的装置,其中,所述装置包括:
    第一判定模块,设置为在所述指定的先听后说机制为所述LBT Cat2机制的情况下,在所述载波集合中的每个载波上按照所述的LBT Cat2机制进行信道的竞争接入时,在每个载波上按照所述LBT Cat2机制执行信道的竞争接入,对于成功完成所述LBT Cat2机制的载波,判定获取到成功完成所述LBT Cat2机制载波的使用权;或者,
    第二判定模块,设置为在K个载波中有S个载波上执行所述LBT Cat2机制成功,在剩余载波上执行所述LBT Cat2机制失败时,若成功执行所述LBT Cat2机制的载波总数不满足特定的载波数量,则按照预设方式处理;其中,所述预设方式包括:判定传输设备未获取到载波的使用权;或,在执行所述LBT Cat2机制失败的载波中随机选择载波来满足特定的载波数量;或,直接评定在执行所述LBT Cat2机制失败的载波上,传输设备获取到载波的使用权;若成功执行所述LBT Cat2机制的载波总数满足特定的载波数量,则传输设备使用或认为获取到成功完成所述LBT Cat2机制载波的使用权。
  30. 根据权利要求29所述的装置,其中,所述成功执行所述LBT Cat2机制包括:若检测到信道从忙到闲,且所述检测信道连续空闲的时间大于和/或等于预设空闲信道评估CCA检测时长,或者,检测信道连续空闲的时间大于和/或等于预设空闲信道评估CCA检测时长,则判定传输设备获取到非授权载波的使用权,或,完成LBT Cat2过程。
  31. 根据权利要求27所述的装置,其中,所述第一接入单元包括:
    第一检测子单元,设置为在所述指定的先听后说机制为所述增强型的LBT Cat2机制,空闲信道评估CCA检测时长的检测起始位置包括固定CCA检测起始位置或随机选择CCA检测起始位置的情况下,在每个载波上按照共同的所述固定的CCA检测起始位置进行信道的竞争接入;或,
    第二检测子单元,设置为在每个载波上按照独立的所述固定的CCA检测起始位置进行信道的竞争接入;或,
    第三检测子单元,设置为在每个载波上按照共同的所述随机选择的CCA检测起始位置进行信道的竞争接入;或,
    第四检测子单元,设置为在每个载波上按照独立的所述随机选择的CCA检测起始位置进行信道的竞争接入。
  32. 根据权利要求31所述的装置,其中,当所述CCA的检测起始位置为所述固定CCA检测起始位置时,预先将竞争接入时间区域划分为K个CCA检测时间段;在所述K个CCA检测时间段上,各个传输设备固定的从K个不同的时间段的一个固定的起点开始进行CCA检测。
  33. 根据权利要求27或31所述的装置,其中,不同传输设备在K个不同时间段上有不同的固定CCA检测起点;或者,不同传输设备在K个不同时间段上有相同的固定CCA检测起点。
  34. 根据权利要求31所述的装置,其中,当所述CCA的检测起始位置为所述随机CCA检测起始位置时,预先将竞争接入时间区域划分为K个CCA检测时间段;在所述K个CCA检测时间段上传输设备随机选择各自的CCA检测时间段的起点作为所述CCA检测的起点;或者,传输设备在竞争接入时间区域上随机选择各自的CCA检测起点;或者,传输设备在K个CCA检测时间段上随机选择各自的CCA检测时间段且在CCA检测时间段内随机选择CCA检测起点;或者,传输设备在K个CCA检测时间段上固定一个CCA检测时间段,且在CCA检测时间段内随机选择CCA检测起点。
  35. 根据权利要求31至34所述的装置,其中,若传输设备检测信道从忙到闲,且连续检测信道空闲时间大于和/或等于所述CCA检测时长,或者,检测信道连续空闲的时间大于和/或等于预设空闲信道评估CCA检测时长,则判定传输设备获取到非授权载波的使用权,或,完成增强型的LBT Cat2过程。
  36. 根据权利要求27所述的装置,其中,所述第一接入单元包括:
    第一判定子单元,设置为在所述指定的先听后说LBT机制为所述快速的先听后说LBT机制的情况下,在每个载波上按照所述快速的先听后说LBT机制完成信道的竞争接入的情况下,判定获取到成功完成LBT过程的载波使用权;或者,
    第二判定子单元,设置为在每个载波上按照所述快速的先听后说LBT机制执行信道的竞争接入,成功完成所述快速的先听后说LBT机制的载波,传输设备判定获取到成功完成所述快速的先听后说LBT过程的载波使用权;或者,未完成所述快速的先听后说LBT机制的载波上,传输设备认为该载波不可用,或者,对于未完成所述快速的先听后说LBT机制的载波,若随机回退值N满足特定的门限值,则传输设备判定获取到成功完成所述 快速的先听后说LBT过程的载波使用权;若随机回退值N不满足特定的门限值,则判定未获取到该载波使用权,或放弃所述载波;或者,
    第三判定子单元,设置为在每个载波上按照所述快速的先听后说LBT机制执行信道的竞争接入,若最后一次或最后连续若干次CCA检测到信道空闲,则传输设备判定获取到成功完成所述快速的先听后说LBT过程的载波使用权;或者,
    第四判定子单元,设置为若存在一个即将完成所述快速的先听后说LBT机制的载波,其他载波上则停止当前的LBT过程,立刻按照所述LBT Cat2机制执行信道的竞争接入,在开始传输时刻之前完成对应的LBT过程的载波,则传输设备判定获取到载波使用权。
  37. 根据权利要求26所述的装置,其中,所述接入模块包括:
    第一执行单元,设置为在自载波调度方式下,在基站在每个载波上按照LBT Cat4机制执行信道的竞争接入的情况下,在选定的一个或是多个载波上执行LBT Cat2机制,在所述载波集合中的其他载波上不执行LBT机制;
    第二执行单元,设置为在选定的一个或是多个载波上执行快速LBT机制,在所述载波集合中的其他载波上不执行LBT机制;
    第三执行单元,设置为在选定的一个或是多个载波上执行快速的LBT机制,在一个或多个载波上即将完成快速LBT过程时,在所述载波集合中的其他载波上执行LBT Cat2机制。
  38. 根据权利要求37所述的装置,其中,所述第三执行单元包括:
    第一执行子单元,设置为当所述一个载波上执行所述快速的LBT过程中的随机回退值N均递减到特定门限值时,所述载波集合中的其他载波开始执行所述LBT Cat2机制;或,
    第二执行子单元,设置为当所述多个载波上各自执行所述快速的LBT过程中的随机回退值N均递减到特定门限值时,所述载波集合中的其他载波开始执行所述LBT Cat2机制;其中,N值先递减到特定门限值的载波上可执行自延迟操作;或,
    第三执行子单元,设置为当所述多个载波上执行所述快速的LBT过程同时检测到信道空闲时,各个载波上的随机回退值N进行递减操作,且N值递减到特定门限值时,所述载波集合中的其他载波开始执行所述LBT Cat2机制。
  39. 根据权利要求26所述的装置,其中,所述接入模块包括:
    第四执行单元,设置为在所述预设的调度方式为所述自载波调度方式下,在基站选定的主载波上按照LBT Cat4机制,辅载波上按照LBT Cat2机制进行信道的竞争接入的情况下,在所述基站指示的主载波上执行LBT Cat2机制,在所述基站侧指示的辅载波上执行简化的LBT Cat4或快速的LBT机制;或,
    第五执行单元,设置为在所述载波集合中的每个载波上均执行LBT Cat2机制;或,
    第六执行单元,设置为在所述载波集合中的每个载波上执行配置的用于执行LBT过程的时间长但随机回退值N相对小的LBT Cat4或快速的LBT机制;或,
    第七执行单元,设置为在所述基站执行LBT Cat4的载波上,不执行LBT机制,在所述基站执行LBT Cat2的载波上,执行配置的用于执行LBT过程的时间长但随机回退值N相对小的LBT Cat4或执行快速LBT过程;或,
    第八执行单元,设置为在所述基站执行LBT成功的载波上,若下行传输burst和上行传输burst之间的间隙Gap小于预设值,则不执行LBT机制,或,执行LBT Cat2机制。
  40. 根据权利要求26所述的装置,其中,所述接入模块包括:
    第九执行单元,设置为在所述预设的调度方式为跨载波调度方式下,在所述载波集合中的每个载波上执行指定的LBT Cat4机制;其中,所述指定的LBT Cat4机制是指最大竞争窗大小比自载波调度执行LBT Cat4的竞争窗大,且比下行执行LBT Cat4机制的竞争窗小的有随机回退的LBT过程;或者,
    第十执行单元,设置为在所述载波集合中的每个载波上执行快速的LBT机制;其中:快速的LBT机制包括:defer period+ECCA或直接ECCA过程;或者,
    第十一执行单元,设置为在所述载波集合中选定的一个或多个载波上执行指定的LBT Cat4机制即将成功时,在剩余的载波上执行LBT Cat2机制;或者,
    第十二执行单元,设置为在所述载波集合中选定的一个或多个载波上执行特定的LBT Cat4机制,剩余的载波上执行快速的LBT机制;或者,
    第十三执行单元,设置为在所述载波集合中选定的一个或多个载波上执行快速的LBT机制,剩余的载波上执行LBT Cat2机制。
  41. 根据权利要求40所述的装置,其中,所述装置还包括:
    第五判定子单元,设置为在所述载波集合中的每个载波上均完成所述指定的LBT Cat4机制或所述快速的LBT机制的情况下,判定获取到成功完成所述指定的LBT Cat4机制或所述快速的LBT机制的载波的使用权;或,
    第六判定子单元,设置为在所述载波集合中,即将完成所述指定的LBT Cat4机制或所述快速的LBT机制的载波,若当前随机回退值值N满足预设的门限值时,则停止其他正在执行所述指定的LBT Cat4机制或所述快速的LBT机制的载波上的LBT过程,立刻执行LBT Cat2机制;在每个载波上完成对应LBT过程的载波的情况下,则传输设备判定获取到成功完成LBT过程的载波的使用权;或,
    第七判定子单元,设置为在所述载波集合中部分载波上完成所述指定的LBT Cat4机 制或所述快速的LBT机制,且未完成所述指定的LBT Cat4过程或所述快速的LBT机制的载波上当前的随机回退值N满足预设的门限值的情况下,判定获取到成功完成LBT过程的载波的使用权;或,
    第八判定子单元,设置为若在开始传输时刻之前未完成指定LBT Cat4过程或所述快速的LBT机制的载波上的最后一次或最后连续若干次的CCA检测信道空闲,则传输设备判定获取的载波的使用权。
  42. 根据权利要求40所述的装置,其中,所述第十一执行单元包括:
    第九判定子单元,设置为在所述载波集合中选定的一个载波上执行所述指定的LBT Cat4机制即将成功时,在剩余的载波上执行所述LBT Cat2机制,当每个载波上均完成各自对应的LBT过程时,判定获取到成功完成LBT过程的载波的使用权;或者,
    第十判定子单元,设置为在所述载波集合中选定的多个载波上均执行所述指定的LBT Cat4机制即将同时成功时,在剩余的载波上执行所述LBT Cat2机制,当每个载波上均完成各自对应的LBT过程时,判定获取到成功完成LBT过程的载波的使用权;或者,
    第十一判定子单元,设置为在所述载波集合中选定的多个载波上执行所述指定的LBT Cat4机制,如果有至少一个载波上即将完成所述指定的LBT Cat4机制,在剩余的载波上执行所述LBT Cat2机制,当每个载波上均完成各自对应的LBT过程时,判定获取到成功完成LBT过程的载波的使用权。
  43. 根据权利要求40所述的装置,其中,所述第十二执行单元包括:
    第十二判定子单元,设置为在所述载波集合中选定的一个载波上执行所述指定的LBT Cat4机制,在剩余的载波上执行所述快速的LBT机制的情况下,若各个载波上在传输开始之前完成对应的LBT过程,则判定获取到成功完成LBT过程的载波的使用权;或者,
    第十三判定子单元,设置为在所述载波集合中选定的一个载波上执行所述指定的LBT Cat4机制,在剩余的载波上执行所述快速的LBT机制的情况下,若各个载波上在传输开始之前有部分载波上未完成对应的LBT过程,则若未完成LBT过程的载波上的当前随机回退值N满足预设的门限值,则判定获取到成功完成LBT过程的载波的使用权;或者,
    第十四判定子单元,设置为在所述载波集合中选定的一个载波上执行所述指定的LBT Cat4机制,在剩余的载波上执行所述快速的LBT机制的情况下,若各个载波上在传输开始之前有部分载波上未完成对应的LBT过程,则若未完成LBT过程的载波上的最后一次或最后连续若干次CCA检测到信道为空闲,则判定获取到成功完成LBT过程的载波的使用权;或者,
    第十五判定子单元,设置为在所述载波集合中选定的多个载波上执行所述指定的 LBT Cat4机制,在剩余的载波上执行所述快速的LBT机制的情况下,若有一个载波上对应的LBT过程的随机回退值N满足特定的门限值,则剩余载波上停止各自的LBT过程,立刻执行LBT Cat2机制;若各个载波在传输开始之前完成对应的LBT过程,则判定获取到成功完成LBT过程的载波的使用权;或者,
    第十六判定子单元,设置为在所述载波集合中选定的多个载波上执行所述指定的LBT Cat4机制,在剩余的载波上执行所述快速的LBT机制的情况下,若在传输开始之前有载波先完成对应的LBT过程,则可以发送预留信号,或者执行自延迟操作;未完成对应的LBT过程的载波继续执行CCA检测,若在传输开始时刻依然未完成LBT过程的载波,判断所述载波上当前随机回退值N满足特定的门限值或最后一次或最后连续若干次CCA检测信道为空闲,则判定获取到成功完成LBT过程的载波的使用权;或者,
    第十七判定子单元,设置为在所述载波集合中选定的多个载波上执行所述指定的LBT Cat4机制,在剩余的载波上执行所述快速的LBT机制的情况下,若各个载波上按照各自的LBT机制进行信道的竞争接入,如果在开始传输时刻之前完成对应的LBT过程的载波上,则传输设备判定获取到成功完成LBT过程的载波的使用权;或者,
    第十八判定子单元,设置为在所述载波集合中选定的多个载波上执行所述指定的LBT Cat4机制,在剩余的载波上执行所述快速的LBT机制的情况下,若各个载波上按照各自的LBT机制进行信道的竞争接入,如果在开始传输时刻之前载波上未完成LBT过程,则若各载波上当前随机回退值N满足预设的门限值的载波,或者,最后一次或最后连续若干次CCA检测信道为空闲,则传输设备判定获取到成功完成LBT过程的载波的使用权;或者,
    第十九判定子单元,设置为在所述载波集合中选定的多个载波上执行所述指定的LBT Cat4机制,在剩余的载波上执行所述快速的LBT机制的情况下,若有载波上的随机回退值N满足第一门限值时,则其他载波上的随机回退值N调整到第一门限值;若调整随机回退值N后的载波上的随机回退值N满足第二门限值时,则其他载波上的随机回退值N调整到第二门限值,以此类推,在开始传输时刻开始之前,如果随机回退值N递减到0或完成对应LBT过程的载波,或,如果在开始传输时刻之前载波上未完成LBT过程,则若载波上当前随机回退值N满足预设的门限值的载波,或者,最后一次或最后连续若干次CCA检测信道为空闲,则传输设备判定获取到成功完成LBT过程的载波的使用权。
  44. 根据权利要求26所述的装置,其中,所述装置还包括:
    第一执行模块,设置为在按照所述先听后说LBT机制竞争接入信道失败的载波,或,所述载波上待传输的数据包的情况下,依据预设方式执行处理流程;其中,所述预设方式包括之一:放弃执行LBT失败的载波,或者,放弃在所述载波上传输;对执行所述LBT失败的载波上的数据包进行重传;在竞争成功的载波上的备选的资源上传输数据包;使用备用的非授权载波;复用其他载波上相同资源一起传输各自的数据包;其中,不同数 据在同一个资源上发,若秩指示RI大于2,则可以复用该资源进行传输,或是通过随机接入无线网络临时标识RNTI或循环移位CS编码在同一资源上发送不同的数据块。
  45. 一种多载波的竞争接入系统,包括:基站和终端,所述基站与终端通信连接,其中,所述终端为权利要求23至44中任一项所述的多载波的竞争接入装置。
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