CN106686727B

CN106686727B - Multi-carrier competition access method, device and system

Info

Publication number: CN106686727B
Application number: CN201510747076.5A
Authority: CN
Inventors: 杨玲; 苟伟; 彭佛才; 毕峰; 赵亚军
Original assignee: ZTE Corp
Current assignee: ZTE Corp
Priority date: 2015-11-05
Filing date: 2015-11-05
Publication date: 2022-04-29
Anticipated expiration: 2035-11-05
Also published as: WO2017076219A1; CN106686727A

Abstract

The invention provides a multi-carrier competition access method, a device and a system, wherein the method comprises the following steps: acquiring a carrier set for executing a Listen Before Talk (LBT) mechanism according to a first preset condition; and according to a preset scheduling mode, performing the competitive access of the channel in the carrier set according to a second preset condition. The problem that the operating state of the uplink data transmission performance at high load is poor due to lack of an LBT (local binary transmission) competitive access method of uplink multiple carriers in the related art is solved, and the effect of improving the operating state of the uplink data transmission performance at high load is achieved.

Description

Multi-carrier competition access method, device and system

Technical Field

The present invention relates to the field of communications, and in particular, to a method, an apparatus, and a system for contention access of multiple carriers.

Background

With the rapid increase of data services, the data transmission pressure borne by the carrier of the authorized spectrum is also increasing, and therefore, sharing the data traffic in the authorized carrier by the carrier of the unlicensed spectrum becomes an important Evolution direction for the development of the subsequent Long Term Evolution (LTE).

The unlicensed spectrum has the characteristics of: the unlicensed spectrum does not need to be purchased, the spectrum resources have zero cost, and the characteristics of free/low-cost use are realized; individuals and enterprises can participate in deployment, equipment of equipment manufacturers can be deployed at will, and the equipment has the characteristics of low admission requirement and low cost; frequency bands such as 5GHz and 2.4GHz in the unlicensed spectrum can be used, and the unlicensed spectrum has the characteristic of large available bandwidth; the unlicensed carrier has a feature of sharing resources, that is, when a plurality of different systems are operated therein or different operators of the same system are operated therein, spectrum utilization efficiency may be improved by considering some shared resources, and so on.

In addition to the benefits of unlicensed carriers in LTE systems, one important challenge that a Local Assigned Address (LAA) system has to face is: the problem of fair coexistence between LTE LAA and other technologies, such as WIreless-FIdelity (Wi-Fi). In addition, for the access of unlicensed spectrum, some regional regulations require that a Listen Before Talk (LBT) mechanism is performed Before transmission is started, and therefore, LAA devices, such as an evolved Node B (eNB) and/or a User Equipment (UE), need to comply with the LBT regulations, so as to achieve friendly coexistence with the Wi-Fi system.

Further, with the intensive research on the LTE (LTE-U) issue on Unlicensed spectrum in the R13LAA SI phase, it is finally agreed whether the UE needs to perform the LBT mechanism before starting transmission in the uplink in the first meeting (3GPP RAN1#82) in the WI phase. That is, most companies consider that the UE needs to execute an 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. Furthermore, there are some working assumptions when a single carrier is used for upstream in WI phase: in the self-scheduling case, the uplink may adopt an LBT Cat2 mechanism, or an LBT Cat4 mechanism, and the maximum contention window value should be selected from the set {3,4,5,6, 7}, where the delay period defer period is 16us plus one slot time; the cross-carrier scheduling case differs from the above in that when the LBT Cat4 mechanism is adopted, the maximum contention window value should be smaller than that of the downlink LBT Cat4, but larger than that of the self-scheduling case. As far as is presently unknown, no consensus has been reached. Even though the above discussion finally agrees, it is difficult to use only one carrier to complete such a large amount of traffic under a high load condition for uplink, or when transmission of data cannot be continued on one carrier due to serious interference or collision, the device needs to switch to another carrier, which may cause a great delay to some extent, and the LBT procedure still needs to be performed to use the carrier, thereby resulting in poor uplink performance under a high load condition.

Aiming at the problem that the uplink data transmission performance is poor in the high-load operation state due to the lack of an uplink multi-carrier LBT (local binary transmission) competitive access method in the related art, no specific solution is available at present.

Disclosure of Invention

The invention provides a multi-carrier contention access method, a multi-carrier contention access device and a multi-carrier contention access system, which are used for at least solving the problem that the transmission performance of uplink data is poor in a high-load operation state due to the lack of an LBT contention access method of uplink multi-carriers in the related art.

According to an aspect of the present invention, there is provided a multi-carrier contention access method, including: acquiring a carrier set for executing a Listen Before Talk (LBT) mechanism according to a first preset condition; and according to a preset scheduling mode, performing the competitive access of the channel in the carrier set according to a second preset condition.

Further, the first preset condition includes: a base station indication; or, combining the base station indication with the user equipment UE selection; or, the user equipment UE autonomously selects; alternatively, it is predefined.

Further, the preset scheduling method includes: self-carrier scheduling mode or cross-carrier scheduling mode.

Further, the second preset condition includes: performing contention access of a channel according to the same Listen Before Talk (LBT) mechanism on each carrier in a carrier set; or, performing contention access of the channel according to a different listen-before-talk, LBT, mechanism on each carrier in the set of carriers.

Further, in a case that the scheduling manner is a self-carrier scheduling manner, performing contention access of a channel on each carrier in the carrier set according to the same listen-before-talk LBT mechanism includes: user Equipment (UE) performs channel contention access on each carrier according to a specified Listen Before Talk (LBT) mechanism; the specified listen before talk LBT mechanism includes one of: LBT Cat2 mechanism; enhanced LBT Cat2 mechanism; a configured LBT Cat4 mechanism for long time to perform LBT procedure but small random backoff value N; a fast listen before talk, LBT, mechanism; wherein the fast listen before talk LBT mechanism comprises one of: delay period + extended clean channel assessment defer period + ECCA procedure, or, directly extended clean channel assessment ECCA procedure.

Further, when the Gap duration Gap between the downlink transmission burst and the uplink transmission burst is less than or equal to a preset threshold, the ue selects whether to execute an uplink LBT mechanism or execute an LBT Cat2 mechanism.

Further, in a case that the specified listen before talk mechanism is an LBT Cat2 mechanism, when performing contention access of a channel according to the LBT Cat2 mechanism on each carrier in the carrier set, acquiring the usage right of the channel includes: performing channel contention access on each carrier according to an LBT Cat2 mechanism, and judging to acquire the use right of the carrier successfully completing the LBT Cat2 mechanism for the carrier successfully completing the LBT Cat2 mechanism; or, if the total number of carriers successfully executing the LBT Cat2 mechanism does not satisfy the specific number of carriers when the LBT Cat2 mechanism is successfully executed on S carriers among the K carriers and the LBT Cat2 mechanism is failed to be executed on the remaining carriers, processing the carriers according to a preset mode; wherein, the preset mode includes: randomly selecting carriers to satisfy a specific number of carriers among carriers failing to perform the LBT Cat2 mechanism; or, directly evaluating that the transmission equipment acquires the use right of the carrier on the carrier which fails to execute the LBT Cat2 mechanism; if the total number of carriers successfully performing the LBT Cat2 mechanism satisfies a specific number of carriers, the transmission device uses or considers to acquire the use right of the carrier successfully completing the LBT Cat2 mechanism.

Further, successfully implementing the LBT Cat2 mechanism includes: if the channel is detected to be idle from busy, and the continuous idle time of the channel is detected to be greater than or equal to the preset idle channel assessment CCA detection time length, or the continuous idle time of the channel is detected to be greater than or equal to the preset idle channel assessment CCA detection time length, it is determined that the transmission device acquires the use right of the unauthorized carrier, or the LBT Cat2 process is completed.

Further, in a case that the specified listen before talk mechanism is an enhanced LBT Cat2 mechanism, and a detection start position of the clear channel assessment CCA detection duration includes a fixed CCA detection start position or a randomly selected CCA detection start position, performing contention access on a channel according to the specified listen before talk LBT mechanism on each carrier includes: performing channel contention access on each carrier according to a common fixed CCA detection starting position; or, performing channel contention access on each carrier according to an independent fixed CCA detection starting position; or, performing channel contention access on each carrier according to a common randomly selected CCA detection starting position; or, performing channel contention access according to an independent randomly selected CCA detection starting position on each carrier.

Further, when the detection starting position of the CCA is a fixed CCA detection starting position, dividing a contention access time area into K CCA detection time periods in advance; in K CCA detection time periods, each transmission device fixedly starts to perform CCA detection from a fixed starting point of K different time periods, and different transmission devices have different fixed CCA detection starting points in K different time periods; if the detection channel is from busy to idle, and the continuous detection channel idle time is greater than or equal to the CCA detection time, or the continuous detection channel idle time is greater than or equal to the preset idle channel assessment CCA detection time, it is determined that the transmission device acquires the right to use the unlicensed carrier, or the LBT Cat2 procedure is completed.

Further, when the detection starting position of the CCA is a random CCA detection starting position, dividing a contention access time area into K CCA detection time periods in advance; the transmission equipment randomly selects the starting point of each CCA detection time period as the starting point of CCA detection in the K CCA detection time periods; if the detection channel is from busy to idle, and the continuous detection channel idle time is greater than or equal to the CCA detection time, or the continuous detection channel idle time is greater than or equal to the preset idle channel assessment CCA detection time, it is determined that the transmission device acquires the use right of the unlicensed carrier, or the enhanced LBT Cat2 process is completed.

Further, in a case that the specified listen before talk LBT mechanism is a fast listen before talk LBT mechanism, performing contention access on a channel according to the specified listen before talk LBT mechanism on each carrier includes: under the condition that the competitive access of a channel is finished on each carrier according to a rapid Listen Before Talk (LBT) mechanism, judging to acquire the use right of the carrier successfully finishing the LBT process; performing channel contention access on each carrier according to a rapid listen-before-talk (LBT) mechanism, successfully completing the carrier of the rapid listen-before-talk (LBT) mechanism, and judging by transmission equipment to acquire the carrier use right for successfully completing the rapid listen-before-talk (LBT) process; on a carrier of an uncompleted fast Listen Before Talk (LBT) mechanism, a transmission device considers that the carrier is unavailable, or for the carrier of the uncompleted fast Listen Before Talk (LBT) mechanism, if a random backoff value N meets a specific threshold value, the transmission device judges that a carrier use right of the fast Listen Before Talk (LBT) process is successfully completed; if the random back-off value N does not meet a specific threshold value, judging that the use right of the carrier is not obtained or the carrier is abandoned; or, performing contention access of a channel on each carrier according to a fast Listen Before Talk (LBT) mechanism, and if the CCA detects that the channel is idle for the last time or a plurality of continuous last times, determining by the transmission equipment to acquire the carrier use right for successfully completing the fast Listen Before Talk (LBT) process; if a carrier which is about to finish the rapid Listen Before Talk (LBT) mechanism exists, the current LBT process is stopped on other carriers, the channel contention access is executed immediately according to the LBT Cat2 mechanism, and the transmission equipment judges that the carrier use right is obtained when the carrier of the corresponding LBT process is finished before the transmission starting moment.

Further, in the self-carrier scheduling manner, in a case that the base station performs contention access of the channel on each carrier according to the LBT Cat4 mechanism, performing contention access of the channel on each carrier in the carrier set according to a different listen-before-talk LBT mechanism includes: performing the LBT Cat2 mechanism on the selected one or more carriers and not performing the LBT mechanism on other carriers in the set of carriers; performing a fast LBT mechanism on the selected one or more carriers, and not performing LBT mechanisms on other carriers in the set of carriers; the fast LBT mechanism is performed on the selected one or more carriers, and the LBT Cat2 mechanism is performed on the other carriers in the set of carriers when the fast LBT procedure is about to be completed on the one or more carriers.

Further, when the fast LBT mechanism is to be completed on the selected one or more carriers, performing the LBT Cat2 mechanism on other carriers in the carrier set includes: when the random backoff value N in the fast LBT process performed on one carrier decreases to a specific threshold, the other carriers in the carrier set start to perform the LBT Cat2 mechanism; or, when the random backoff values N in the fast LBT procedures performed on the multiple carriers respectively decrease to a specific threshold, the other carriers in the carrier set start to perform the LBT Cat2 mechanism; wherein, the N value is decreased to the carrier wave with a specific threshold value first to execute self-delay operation; or, when the fast LBT process is performed on multiple carriers and channel idle is detected at the same time, the random backoff N on each carrier is decremented, and when the value N is decremented to a specific threshold, the other carriers in the carrier set start to perform the LBT Cat2 mechanism.

Further, when the preset scheduling mode is a self-carrier scheduling mode, and when the contention access of the channel is performed on the primary carrier selected by the base station according to the LBT Cat4 mechanism and on the secondary carrier according to the LBT Cat2 mechanism, performing the contention access of the channel in the carrier set according to a second preset condition includes: performing an LBT Cat2 mechanism on a primary carrier indicated by a base station, and performing a simplified LBT Cat4 or a fast LBT mechanism on a secondary carrier indicated by the base station; or, the LBT Cat2 mechanism is performed on each carrier in the set of carriers; or, performing a configured LBT mechanism on each carrier in the set of carriers, which is long in time to perform the LBT procedure but with a relatively small random backoff value N, LBT Cat4 or fast LBT; or, on the carrier where the base station performs LBT Cat4, the LBT mechanism is not performed, and on the carrier where the base station performs LBT Cat2, the configured LBT Cat4, which has a long time for performing the LBT procedure but a relatively small random backoff value N, or the fast LBT procedure is performed; or, on a carrier on which the base station successfully performs LBT, if a Gap between a downlink transmission burst and an uplink transmission burst is smaller than a preset value, the LBT mechanism is not performed, or the LBT Cat2 mechanism is performed.

Further, when the preset scheduling mode is a cross-carrier scheduling mode, performing contention access of the channel in the carrier set according to a second preset condition includes: performing a specified LBT Cat4 mechanism on each carrier in the set of carriers; the specified LBT Cat4 mechanism refers to an LBT procedure with a random backoff, wherein the maximum contention window size is larger than the contention window for performing LBT Cat4 by self-carrier scheduling, and smaller than the contention window for performing LBT Cat4 by downlink; or, 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 process; or, when the specified LBT Cat4 mechanism is to be successfully executed on one or more selected carriers in the carrier set, the LBT Cat2 mechanism is executed on the rest carriers; or, a specific LBT Cat4 mechanism is performed on one or more selected carriers in the carrier set, and a fast LBT mechanism is performed on the remaining carriers; alternatively, the fast LBT mechanism is performed on a selected one or more carriers in the set of carriers, and the LBT Cat2 mechanism is performed on the remaining carriers.

Further, in the case that a specified LBT Cat4 mechanism or a fast LBT mechanism is performed on each carrier in the carrier set, determining to acquire the channel usage right includes: under the condition that the appointed LBT Cat4 mechanism or the rapid LBT mechanism is completed on each carrier in the carrier set, judging to acquire the use right of the carrier successfully completing the appointed LBT Cat4 mechanism or the rapid LBT mechanism; or, in the carrier set, a carrier that is about to complete the specified LBT Cat4 mechanism or the fast LBT mechanism, if the current random backoff value N satisfies the preset threshold, the LBT process on other carriers that are executing the specified LBT Cat4 mechanism or the fast LBT mechanism is stopped, and the LBT Cat2 mechanism is immediately executed; under the condition that the carrier corresponding to the LBT process is completed on each carrier, the transmission equipment judges to acquire the use right of the carrier successfully completing the LBT process; or, under the condition that a specified LBT Cat4 mechanism or a rapid LBT mechanism is completed on a part of carriers in the carrier set and a current random backoff value N on a carrier not completing the specified LBT Cat4 process or the rapid LBT mechanism meets a preset threshold value, determining to acquire the use right of a carrier successfully completing the LBT process; or, if the CCA detection channel on the carrier of the specified LBT Cat4 procedure or the fast LBT mechanism is not completed for the last time or several times consecutively before the transmission start time is clear, the transmission apparatus determines the usage right of the acquired carrier.

Further, when performing the specified LBT Cat4 mechanism on one or more carriers selected from the carrier set is about to succeed, determining to acquire the channel usage right in case of performing the LBT Cat2 mechanism on the remaining carriers comprises: when the designated LBT Cat4 mechanism is executed on one carrier selected from the carrier set to be successful, an LBT Cat2 mechanism is executed on the rest carriers, and when each carrier finishes the respective corresponding LBT process, the use right of the carrier which successfully finishes the LBT process is judged to be obtained; or, when the specified LBT Cat4 mechanism is executed on each of the multiple carriers selected in the carrier set, that is, the LBT Cat2 mechanism is executed on the remaining carriers, and when each carrier completes its corresponding LBT procedure, it is determined that the use right of the carrier that successfully completes the LBT procedure is obtained; or, a specified LBT Cat4 mechanism is executed on a plurality of carriers selected in the carrier set, if at least one carrier is to complete the specified LBT Cat4 mechanism, an LBT Cat2 mechanism is executed on the remaining carriers, and when each carrier completes its corresponding LBT procedure, it is determined to acquire the use right of the carrier that successfully completes the LBT procedure.

Further, in the case that a specific LBT Cat4 mechanism is performed on one or more selected carriers in the carrier set, and a fast LBT mechanism is performed on the remaining carriers, determining to acquire the channel usage right includes: executing a specified LBT Cat4 mechanism on a selected carrier in the carrier set, and under the condition of executing a rapid LBT mechanism on the rest carriers, if the corresponding LBT process is completed on each carrier before the transmission starts, judging to acquire the use right of the carrier successfully completing the LBT process; or, under the condition that a designated LBT Cat4 mechanism is executed on a selected carrier in the carrier set and a fast LBT mechanism is executed on the remaining carriers, if a corresponding LBT process is not completed on a part of carriers before the transmission starts on each carrier, if a current random backoff value N on the carrier on which the LBT process is not completed meets a preset threshold value, determining to acquire a use right of the carrier which successfully completes the LBT process; or, under the condition that a designated LBT Cat4 mechanism is executed on a selected carrier in the carrier set and a fast LBT mechanism is executed on the remaining carriers, if a corresponding LBT process is not completed on a part of carriers before the transmission starts on each carrier, if the last or last consecutive times of CCA on the carrier on which the LBT process is not completed detects that the channel is idle, it determines to acquire the use right of the carrier which successfully completes the LBT process; or, executing a specified LBT Cat4 mechanism on a plurality of carriers selected in the carrier set, and under the condition that a fast LBT mechanism is executed on the remaining carriers, if a random backoff value N of a corresponding LBT procedure on one carrier satisfies a specific threshold, stopping respective LBT procedures on the remaining carriers, and immediately executing an LBT Cat2 mechanism; if each carrier finishes the corresponding LBT process before the transmission starts, judging to acquire the use right of the carrier which successfully finishes the LBT process; or, under the condition that a designated LBT Cat4 mechanism is executed on a plurality of carriers selected in the carrier set and a fast LBT mechanism is executed on the remaining carriers, if a carrier completes a corresponding LBT procedure before transmission starts, a reservation signal may be sent or a self-delaying operation may be executed; if the carrier which does not complete the corresponding LBT process still does not complete the LBT process at the transmission starting moment, judging that a current random back-off value N on the carrier meets a specific threshold value or a CCA detection channel is idle for the last time or a plurality of times of last continuous times, and judging that the use right of the carrier which successfully completes the LBT process is obtained; or, executing a specified LBT Cat4 mechanism on a plurality of carriers selected in the carrier set, and under the condition of executing a fast LBT mechanism on the remaining carriers, if each carrier performs channel contention access according to its respective LBT mechanism, if the carrier completes the corresponding LBT procedure before the transmission start time, the transmission device determines to acquire the use right of the carrier that successfully completes the LBT procedure; or, under the condition that a plurality of carriers selected in the carrier set execute a specified LBT Cat4 mechanism, and execute a fast LBT mechanism on the remaining carriers, if each carrier performs channel contention access according to its respective LBT mechanism, if the LBT process is not completed on the carrier before the transmission start time, if the current random backoff value N on each carrier satisfies the carrier of the preset threshold value, or the CCA detects that the channel is idle for the last time or for the last consecutive times, the transmission device determines to acquire the usage right of the carrier that successfully completes the LBT process; or, executing a specified LBT Cat4 mechanism on a plurality of carriers selected in the carrier set, and under the condition that a fast LBT mechanism is executed on the remaining carriers, if a random backoff value N on a carrier satisfies a first threshold, adjusting the random backoff values N on other carriers to the first threshold; if the random backoff value N on the carrier after the adjustment of the random backoff value N meets the second threshold value, adjusting the random backoff values N on the other carriers 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 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 meets the carrier with the preset threshold value, or if the CCA detection channel is idle for the last time or last continuous times, the transmission device determines to acquire the usage right of the carrier successfully completing the LBT process.

Further, the method further comprises: executing a processing flow according to a preset mode under the condition that a Listen Before Talk (LBT) mechanism competes for a carrier failed in accessing a channel or a data packet to be transmitted on the carrier; wherein, the preset mode includes one of: dropping carriers that failed to perform LBT or dropping transmissions on carriers; retransmitting a data packet on a carrier on which LBT fails; transmitting the data packet on the alternative resource on the carrier wave which is successfully competed; using a backup unlicensed carrier; multiplexing the same resources on other carriers to transmit respective data packets together; wherein, different data are sent on the same resource, if the rank indication RI is greater than 2, the resource can be multiplexed for transmission, or different data blocks are sent on the same resource through the random access radio network temporary identifier RNTI or the cyclic shift CS code.

According to another aspect of the present invention, there is provided an apparatus for contention access for multiple carriers, comprising: an obtaining module, configured to obtain a carrier set for performing a listen before talk LBT mechanism according to a first preset condition; and the access module is used for executing the competitive access of the channel in the carrier set according to a second preset condition according to a preset scheduling mode.

Further, the access module comprises: a first access unit, configured to perform contention access on a channel on each carrier according to a specified listen before talk LBT mechanism when a scheduling manner is a self-carrier scheduling manner; the specified listen before talk LBT mechanism includes one of: LBT Cat2 mechanism; enhanced LBT Cat2 mechanism; a configured LBT Cat4 mechanism for long time to perform LBT procedure but small random backoff value N; a fast listen before talk, LBT, mechanism; wherein the fast listen before talk LBT mechanism comprises one of: delay period + extended clean channel assessment defer period + ECCA procedure, or, directly extended clean channel assessment ECCA procedure.

Further, the execution unit is configured to select whether to execute the uplink LBT mechanism or execute the LBT Cat2 mechanism when a Gap duration between the downlink transmission burst and the uplink transmission burst is less than or equal to a preset threshold.

Further, the apparatus comprises: a first determining module, configured to, when a specified listen-before-talk mechanism is an LBT Cat2 mechanism, perform contention access of a channel according to an LBT Cat2 mechanism on each carrier in a carrier set when contention access of the channel is performed according to the LBT Cat2 mechanism on each carrier, and determine to acquire a use right of a carrier successfully completing the LBT Cat2 mechanism for a carrier successfully completing the LBT Cat2 mechanism; or, the second determining module is configured to, when the LBT Cat2 mechanism is successfully executed on S carriers among the K carriers, and when the LBT Cat2 mechanism is failed to be executed on the remaining carriers, if the total number of carriers successfully executing the LBT Cat2 mechanism does not satisfy the specific number of carriers, process in a preset manner; wherein, the preset mode includes: randomly selecting carriers to satisfy a specific number of carriers among carriers failing to perform the LBT Cat2 mechanism; or, directly evaluating that the transmission equipment acquires the use right of the carrier on the carrier which fails to execute the LBT Cat2 mechanism; if the total number of carriers successfully performing the LBT Cat2 mechanism satisfies a specific number of carriers, the transmission device uses or considers to acquire the use right of the carrier successfully completing the LBT Cat2 mechanism.

Further, the first access unit comprises: a first detection subunit, configured to perform, on each carrier, contention access to a channel according to a common fixed CCA detection starting position when a specified listen-before-talk mechanism is an enhanced LBT Cat2 mechanism and a detection starting position of a clear channel assessment CCA detection duration includes the fixed CCA detection starting position or a randomly selected CCA detection starting position; or, the second detecting subunit is configured to perform contention access of the channel on each carrier according to an independent fixed CCA detection starting position; or, the third detecting subunit is configured to perform contention access of the channel on each carrier according to the common randomly selected CCA detection starting position; or, the fourth detecting subunit is configured to perform contention access on the channel on each carrier according to an independent randomly selected CCA detection start position.

Further, the first access unit comprises: a first determining subunit, configured to determine, when the specified listen-before-talk LBT mechanism is a fast listen-before-talk LBT mechanism, to acquire a carrier usage right for successfully completing an LBT process under a condition that contention access of a channel is completed on each carrier according to the fast listen-before-talk LBT mechanism; a second determining subunit, configured to perform contention access of a channel on each carrier according to a fast listen-before-talk LBT mechanism, successfully complete the carrier of the fast listen-before-talk LBT mechanism, and determine, by a transmission device, to acquire a carrier usage right that successfully completes the fast listen-before-talk LBT process; on a carrier of an uncompleted fast Listen Before Talk (LBT) mechanism, a transmission device considers that the carrier is unavailable, or for the carrier of the uncompleted fast Listen Before Talk (LBT) mechanism, if a random backoff value N meets a specific threshold value, the transmission device judges that a carrier use right of the fast Listen Before Talk (LBT) process is successfully completed; if the random back-off value N does not meet a specific threshold value, judging that the use right of the carrier is not obtained or the carrier is abandoned; or, a third determining subunit, configured to perform contention access of a channel on each carrier according to a fast listen-before-talk LBT mechanism, where if the last CCA or last consecutive times detects that the channel is idle, the transmission device determines to acquire a carrier usage right that successfully completes a fast listen-before-talk LBT process; a fourth determining subunit, configured to stop the current LBT process if there is a carrier that is to complete a fast listen before talk LBT mechanism, immediately perform contention access of a channel according to the LBT Cat2 mechanism, and determine to acquire a carrier use right if the carrier completes the corresponding LBT process before the transmission start time.

Further, the access module comprises: a first performing unit, configured to, in a self-carrier scheduling manner, perform, on each carrier and according to an LBT Cat4 mechanism, a LBT Cat2 mechanism on a selected one or multiple carriers and not perform the LBT mechanism on other carriers in a carrier set in a case that a base station performs contention access for a channel on each carrier; a second performing unit, configured to perform a fast LBT mechanism on the selected one or more carriers, and not perform the LBT mechanism on other carriers in the carrier set; a third performing unit, configured to perform a fast LBT mechanism on the selected one or more carriers, and perform an LBT Cat2 mechanism on other carriers in the carrier set when the fast LBT procedure is to be completed on the one or more carriers.

Further, the third execution unit includes: a first performing subunit, configured to, when a random backoff value N in a fast LBT performing process on one carrier decreases to a specific threshold value, start performing an LBT Cat2 mechanism on other carriers in a carrier set; or, the second performing subunit is configured to, when the random backoff values N in the fast LBT procedures performed on the multiple carriers are all decreased to a specific threshold value, start performing the LBT Cat2 mechanism by other carriers in the carrier set; wherein, the N value is decreased to the carrier wave with a specific threshold value first to execute self-delay operation; or, the third performing subunit is configured to, when a channel idle is detected while performing a fast LBT procedure on multiple carriers, perform a decrementing operation on the random backoff N on each carrier, and when the value N is decremented to a specific threshold, start to perform the LBT Cat2 mechanism on other carriers in the carrier set.

Further, the access module comprises: a fourth execution unit, configured to, when the preset scheduling mode is a self-carrier scheduling mode, perform channel contention access on a primary carrier selected by the base station according to an LBT Cat4 mechanism and an LBT Cat2 mechanism on an auxiliary carrier, execute the LBT Cat2 mechanism on the primary carrier indicated by the base station, and execute a simplified LBT Cat4 or a fast LBT mechanism on the auxiliary carrier indicated by the base station side; or, a fifth performing unit, configured to perform the LBT Cat2 mechanism on each carrier in the carrier set; or, a sixth performing unit, configured to perform, on each carrier in the carrier set, an LBT Cat4 or a fast LBT mechanism configured for performing an LBT procedure with a long time but a relatively small random backoff value N; or, the seventh performing unit is configured to, on the carrier on which the base station performs the LBT Cat4, perform no LBT mechanism, and, on the carrier on which the base station performs the LBT Cat2, perform the configured LBT Cat4 with a long time for performing the LBT procedure but a relatively small random backoff value N or perform the fast LBT procedure; or, the eighth execution unit is configured to, on a carrier on which the base station successfully performs LBT, not execute the LBT mechanism or execute the LBT Cat2 mechanism if a Gap between the downlink transmission burst and the uplink transmission burst is smaller than a preset value.

Further, the access module comprises: a ninth executing unit, configured to execute a specified LBT Cat4 mechanism on each carrier in the carrier set when the preset scheduling mode is a cross-carrier scheduling mode; the specified LBT Cat4 mechanism refers to an LBT procedure with a random backoff, wherein the maximum contention window size is larger than the contention window for performing LBT Cat4 by self-carrier scheduling, and smaller than the contention window for performing LBT Cat4 by downlink; or, a tenth performing unit, configured to perform a fast LBT mechanism on each carrier in the carrier set; wherein: the fast LBT mechanism includes: defer period + ECCA or direct ECCA process; or, the eleventh performing unit is configured to, when it is about to succeed to perform the specified LBT Cat4 mechanism on one or more carriers selected from the carrier set, perform the LBT Cat2 mechanism on the remaining carriers; or, a twelfth performing unit, configured to perform a specific LBT Cat4 mechanism on one or more selected carriers in the carrier set, and perform a fast LBT mechanism on the remaining carriers; or, a thirteenth performing unit, configured to perform a fast LBT mechanism on one or more selected carriers in the carrier set, and perform an LBT Cat2 mechanism on the remaining carriers.

Further, the apparatus further comprises: a fifth determining subunit, configured to determine, under the condition that the specified LBT Cat4 mechanism or the fast LBT mechanism is completed on each carrier in the carrier set, to acquire a use right of a carrier that successfully completes the specified LBT Cat4 mechanism or the fast LBT mechanism; or, a sixth determining subunit, configured to stop, in a carrier set, an LBT procedure on a carrier on which the specified LBT Cat4 mechanism or the fast LBT mechanism is being executed if a current random backoff value N satisfies a preset threshold value, and immediately execute the LBT Cat2 mechanism, where the specified LBT Cat4 mechanism or the fast LBT mechanism is to be completed; under the condition that the carrier corresponding to the LBT process is completed on each carrier, the transmission equipment judges to acquire the use right of the carrier successfully completing the LBT process; or, the seventh determining subunit is configured to determine to acquire the usage right of the carrier that successfully completes the LBT procedure when the specified LBT Cat4 mechanism or the fast LBT mechanism is completed on a part of carriers in the carrier set, and a current random backoff value N on the carrier that does not complete the specified LBT Cat4 procedure or the fast LBT mechanism satisfies a preset threshold value; or, an eighth determining subunit, configured to determine, by the transmitting device, the right to use the acquired carrier if the CCA detection channel on the carrier of the specified LBT Cat4 procedure or the fast LBT mechanism is not idle for the last time or for the last consecutive times before the transmission start time.

Further, the eleventh execution unit includes: a ninth determining subunit, configured to, when it is about to succeed to execute the specified LBT Cat4 mechanism on a selected carrier in the carrier set, execute an LBT Cat2 mechanism on the remaining carriers, and when each carrier completes its respective LBT procedure, determine to acquire a use right of a carrier that successfully completes the LBT procedure; or, the tenth determining subunit is configured to, when it is about to succeed in simultaneously executing the specified LBT Cat4 mechanism on each of the multiple carriers selected in the carrier set, execute an LBT Cat2 mechanism on the remaining carriers, and when each carrier completes its respective LBT procedure, determine to acquire the usage right of the carrier that successfully completes the LBT procedure; or, the eleventh determining subunit is configured to execute the specified LBT Cat4 mechanism on multiple carriers selected in the carrier set, execute the LBT Cat2 mechanism on the remaining carriers if at least one carrier is to complete the specified LBT Cat4 mechanism, and determine to acquire the usage right of the carrier that successfully completes the LBT procedure when each carrier completes its corresponding LBT procedure.

Further, the twelfth execution unit includes: a twelfth determining subunit, configured to execute a specified LBT Cat4 mechanism on a selected carrier in the carrier set, and under the condition that a fast LBT mechanism is executed on the remaining carriers, if a corresponding LBT procedure is completed before transmission starts on each carrier, determine to acquire a use right of a carrier that successfully completes the LBT procedure; or, a thirteenth determining subunit, configured to execute a specified LBT Cat4 mechanism on a selected carrier in the carrier set, and under the condition that a fast LBT mechanism is executed on the remaining carriers, if a corresponding LBT procedure is not completed on a part of carriers before transmission starts on each carrier, determine to acquire a use right of a carrier that successfully completes the LBT procedure if a current random backoff value N on the carrier that does not complete the LBT procedure satisfies a preset threshold value; or, a fourteenth determining subunit, configured to execute a specified LBT Cat4 mechanism on a selected carrier in the carrier set, and under the condition that a fast LBT mechanism is executed on the remaining carriers, if there is an incomplete corresponding LBT procedure on a part of carriers before transmission starts on each carrier, if a CCA for the last time or last consecutive times on the carrier on which the LBT procedure is incomplete detects that a channel is idle, determine to acquire a use right of a carrier that successfully completes the LBT procedure; or, the fifteenth determining subunit is configured to execute a specified LBT Cat4 mechanism on multiple carriers selected in the carrier set, and in a case that a fast LBT mechanism is executed on remaining carriers, if a random backoff value N of a corresponding LBT procedure on one carrier satisfies a specific threshold, stop the respective LBT procedure on the remaining carriers, and immediately execute an LBT Cat2 mechanism; if each carrier finishes the corresponding LBT process before the transmission starts, judging to acquire the use right of the carrier which successfully finishes the LBT process; or, a sixteenth determining subunit, configured to execute a specified LBT Cat4 mechanism on a plurality of carriers selected in the carrier set, and in a case that a fast LBT mechanism is executed on the remaining carriers, if a carrier completes a corresponding LBT procedure before transmission starts, send a reservation signal, or execute a self-delaying operation; if the carrier which does not complete the corresponding LBT process still does not complete the LBT process at the transmission starting moment, judging that a current random back-off value N on the carrier meets a specific threshold value or a CCA detection channel is idle for the last time or a plurality of times of last continuous times, and judging that the use right of the carrier which successfully completes the LBT process is obtained; or, a seventeenth determining subunit, configured to execute a specified LBT Cat4 mechanism on multiple carriers selected in the carrier set, and under the condition that a fast LBT mechanism is executed on the remaining carriers, if each carrier performs contention access of a channel according to its LBT mechanism, if a corresponding LBT process is completed on a carrier before the transmission start time, the transmission device determines to acquire a use right of the carrier that successfully completes the LBT process; or, an eighteenth determining subunit, configured to execute a specified LBT Cat4 mechanism on multiple carriers selected in the carrier set, and if a fast LBT mechanism is executed on the remaining carriers, perform contention access on a channel according to the respective LBT mechanism on each carrier, and if an LBT process is not completed on a carrier before the transmission start time, determine, by the transmission device, that a right to use the carrier that successfully completes the LBT process is obtained if a current random backoff value N on each carrier satisfies a preset threshold value, or if a CCA detection channel is idle for the last time or last consecutive times; or, the nineteenth determining subunit is configured to execute a specified LBT Cat4 mechanism on multiple carriers selected in the carrier set, and if the random backoff N on a carrier satisfies a first threshold value in the case of executing a fast LBT mechanism on the remaining carriers, adjust the random backoff N on the other carriers to the first threshold value; if the random backoff value N on the carrier after the adjustment of the random backoff value N meets the second threshold value, adjusting the random backoff values N on the other carriers 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 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 meets the carrier with the preset threshold value, or if the CCA detection channel is idle for the last time or last continuous times, the transmission device determines to acquire the usage right of the carrier successfully completing the LBT process.

Further, the apparatus further comprises: the first execution module is used for executing a processing flow according to a preset mode under the condition that the carrier fails to compete for accessing a channel according to a Listen Before Talk (LBT) mechanism or a data packet to be transmitted on the carrier; wherein, the preset mode includes one of: dropping carriers that failed to perform LBT or dropping transmissions on carriers; retransmitting a data packet on a carrier on which LBT fails; transmitting the data packet on the alternative resource on the carrier wave which is successfully competed; using a backup unlicensed carrier; multiplexing the same resources on other carriers to transmit respective data packets together; wherein, different data are sent on the same resource, if the rank indication RI is greater than 2, the resource can be multiplexed for transmission, or different data blocks are sent on the same resource through the random access radio network temporary identifier RNTI or the cyclic shift CS code.

According to still another aspect of the present invention, there is provided a contention access system for multiple carriers, including: the base station is in communication connection with the terminal, wherein the terminal is the multi-carrier contention access device.

According to the invention, a carrier set for executing a Listen Before Talk (LBT) mechanism is obtained according to a first preset condition; and according to a preset scheduling mode, performing the competitive access of the channel in the carrier set according to a second preset condition. The problem that the operating state of the uplink data transmission performance at high load is poor due to lack of an LBT (local binary transmission) competitive access method of uplink multiple carriers in the related art is solved, and the effect of improving the operating state of the uplink data transmission performance at high load is achieved.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention. In the drawings:

fig. 1 is a flowchart of a multi-carrier contention access method according to an embodiment of the present invention;

fig. 2 is a block diagram of a multi-carrier contention access apparatus according to an embodiment of the present invention;

fig. 3 is a block diagram of a multi-carrier contention access system according to an embodiment of the present invention.

Detailed Description

The invention will be described in detail hereinafter with reference to the accompanying drawings in conjunction with embodiments. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.

It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a sequential or chronological order.

Example one

In this embodiment, a multi-carrier contention access method is provided, and 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 flowchart includes the following steps:

step S102, acquiring a carrier set for executing a Listen Before Talk (LBT) mechanism according to a first preset condition;

step S104, according to a preset scheduling mode, performing contention access of the channel in the carrier set according to a second preset condition.

According to the multi-carrier competition access method provided by the embodiment of the application, a carrier set for executing a Listen Before Talk (LBT) mechanism is obtained according to a first preset condition; and according to a preset scheduling mode, performing the competitive access of the channel in the carrier set according to a second preset condition. The problem that the operating state of the uplink data transmission performance at high load is poor due to lack of an LBT (local binary transmission) competitive access method of uplink multiple carriers in the related art is solved, and the effect of improving the operating state of the uplink data transmission performance at high load is achieved.

Further, the first preset condition includes: a base station indication; or, the base station indication is combined with User Equipment (UE) selection; or, the user equipment UE autonomously selects; alternatively, it is predefined.

Further, the second preset condition includes: performing contention access of a channel according to the same Listen Before Talk (Listen Before Talk, abbreviated as LBT) mechanism on each carrier in a carrier set; or, performing contention access of the channel according to a different listen-before-talk, LBT, mechanism on each carrier in the set of carriers.

Further, in a case that the scheduling manner is a self-carrier scheduling manner, performing contention access of a channel on each carrier in the carrier set according to the same listen-before-talk LBT mechanism includes: user Equipment (UE) performs channel contention access on each carrier according to a specified Listen Before Talk (LBT) mechanism;

the specified listen before talk LBT mechanism includes one of: LBT Cat2 mechanism; enhanced LBT Cat2 mechanism; a configured LBT Cat4 mechanism for long time to perform LBT procedure but small random backoff value N; a fast listen before talk, LBT, mechanism;

wherein the fast listen before talk LBT mechanism comprises one of: a delay period + Extended clean Channel Assessment (defer period + ECCA, defer period + Extended Clear Channel Assessment) procedure, or a direct Extended clean Channel Assessment ECCA procedure.

Further, in a case that the specified listen before talk mechanism is an LBT Cat2 mechanism, when performing contention access of a channel according to the LBT Cat2 mechanism on each carrier in the carrier set, acquiring the usage right of the channel includes:

performing channel contention access on each carrier according to an LBT Cat2 mechanism, and judging to acquire the use right of the carrier successfully completing the LBT Cat2 mechanism for the carrier successfully completing the LBT Cat2 mechanism; alternatively, the first and second electrodes may be,

performing an LBT Cat2 mechanism successfully on S carriers in K carriers, and when performing the LBT Cat2 mechanism fails on the rest carriers, if the total number of the carriers successfully performing the LBT Cat2 mechanism does not meet the specific number of the carriers, processing according to a preset mode; wherein, the preset mode includes: randomly selecting carriers to satisfy a specific number of carriers among carriers failing to perform the LBT Cat2 mechanism; or, directly evaluating that the transmission equipment acquires the use right of the carrier on the carrier which fails to execute the LBT Cat2 mechanism; if the total number of carriers successfully performing the LBT Cat2 mechanism satisfies a specific number of carriers, the transmission device uses or considers to acquire the use right of the carrier successfully completing the LBT Cat2 mechanism.

Further, in a case that the specified listen before talk mechanism is an enhanced LBT Cat2 mechanism, and a detection start position of the clear channel assessment CCA detection duration includes a fixed CCA detection start position or a randomly selected CCA detection start position, performing contention access on a channel according to the specified listen before talk LBT mechanism on each carrier includes:

performing channel contention access on each carrier according to a common fixed CCA detection starting position; or the like, or, alternatively,

performing channel contention access on each carrier according to an independent fixed CCA detection starting position; or the like, or, alternatively,

performing channel contention access on each carrier according to a common randomly selected CCA detection starting position; or the like, or, alternatively,

and performing channel contention access according to an independent randomly selected CCA detection starting position on each carrier.

Further, in a case that the specified listen before talk LBT mechanism is a fast listen before talk LBT mechanism, performing contention access on a channel according to the specified listen before talk LBT mechanism on each carrier includes:

under the condition that the competitive access of a channel is finished on each carrier according to a rapid Listen Before Talk (LBT) mechanism, judging to acquire the use right of the carrier successfully finishing the LBT process;

performing channel contention access on each carrier according to a rapid listen-before-talk (LBT) mechanism, successfully completing the carrier of the rapid listen-before-talk (LBT) mechanism, and judging by transmission equipment to acquire the carrier use right for successfully completing the rapid listen-before-talk (LBT) process; on a carrier of an uncompleted fast Listen Before Talk (LBT) mechanism, a transmission device considers that the carrier is unavailable, or for the carrier of the uncompleted fast Listen Before Talk (LBT) mechanism, if a random backoff value N meets a specific threshold value, the transmission device judges that a carrier use right of the fast Listen Before Talk (LBT) process is successfully completed; if the random back-off value N does not meet a specific threshold value, judging that the use right of the carrier is not obtained or the carrier is abandoned; alternatively, the first and second electrodes may be,

performing channel contention access on each carrier according to a rapid listen-before-talk (LBT) mechanism, and if the CCA detects that the channel is idle for the last time or a plurality of continuous last times, determining to acquire the carrier use right for successfully completing the rapid listen-before-talk (LBT) process by the transmission equipment;

if a carrier which is about to finish the rapid Listen Before Talk (LBT) mechanism exists, the current LBT process is stopped on other carriers, the channel contention access is executed immediately according to the LBT Cat2 mechanism, and the transmission equipment judges that the carrier use right is obtained when the carrier of the corresponding LBT process is finished before the transmission starting moment.

Further, in the self-carrier scheduling manner, in a case that the base station performs contention access of the channel on each carrier according to the LBT Cat4 mechanism, performing contention access of the channel on each carrier in the carrier set according to a different listen-before-talk LBT mechanism includes:

performing the LBT Cat2 mechanism on the selected one or more carriers and not performing the LBT mechanism on other carriers in the set of carriers;

performing a fast LBT mechanism on the selected one or more carriers, and not performing LBT mechanisms on other carriers in the set of carriers;

the fast LBT mechanism is performed on the selected one or more carriers, and the LBT Cat2 mechanism is performed on the other carriers in the set of carriers when the fast LBT procedure is about to be completed on the one or more carriers.

Further, when the fast LBT mechanism is to be completed on the selected one or more carriers, performing the LBT Cat2 mechanism on other carriers in the carrier set includes:

when the random backoff value N in the fast LBT process performed on one carrier decreases to a specific threshold, the other carriers in the carrier set start to perform the LBT Cat2 mechanism; or the like, or, alternatively,

when the random backoff values N in the respective fast LBT procedures performed on the multiple carriers are all decreased to a specific threshold value, the other carriers in the carrier set start to perform the LBT Cat2 mechanism; wherein, the N value is decreased to the carrier wave with a specific threshold value first to execute self-delay operation; or the like, or, alternatively,

when the fast LBT process is performed on multiple carriers and the channel is detected to be idle at the same time, the random backoff N on each carrier is decremented, and when the value N is decremented to a specific threshold, the other carriers in the carrier set start to perform the LBT Cat2 mechanism.

Further, when the preset scheduling mode is a self-carrier scheduling mode, and when the contention access of the channel is performed on the primary carrier selected by the base station according to the LBT Cat4 mechanism and on the secondary carrier according to the LBT Cat2 mechanism, performing the contention access of the channel in the carrier set according to a second preset condition includes:

performing an LBT Cat2 mechanism on a primary carrier indicated by a base station, and performing a simplified LBT Cat4 or a fast LBT mechanism on a secondary carrier indicated by the base station; or the like, or, alternatively,

performing the LBT Cat2 mechanism on each carrier in the set of carriers; or, performing a configured LBT mechanism on each carrier in the set of carriers, which is long in time to perform the LBT procedure but with a relatively small random backoff value N, LBT Cat4 or fast LBT; or the like, or, alternatively,

on a carrier of which the base station performs LBT Cat4, an LBT mechanism is not performed, and on a carrier of which the base station performs LBT Cat2, an LBT Cat4 configured for performing an LBT procedure for a long time but with a relatively small random backoff value N or a fast LBT procedure is performed; or the like, or, alternatively,

on a carrier on which the base station successfully executes the LBT, if a Gap between a downlink transmission burst and an uplink transmission burst is smaller than a preset value, the LBT mechanism is not executed, or the LBT Cat2 mechanism is executed.

Further, when the preset scheduling mode is a cross-carrier scheduling mode, performing contention access of the channel in the carrier set according to a second preset condition includes:

performing a specified LBT Cat4 mechanism on each carrier in the set of carriers; the specified LBT Cat4 mechanism refers to an LBT procedure with a random backoff, wherein the maximum contention window size is larger than the contention window for performing LBT Cat4 by self-carrier scheduling, and smaller than the contention window for performing LBT Cat4 by downlink; alternatively, the first and second electrodes may be,

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 process; alternatively, the first and second electrodes may be,

performing the LBT Cat2 mechanism on the remaining carriers when performing the specified LBT Cat4 mechanism on the selected one or more carriers in the carrier set is about to succeed; alternatively, the first and second electrodes may be,

performing a specific LBT Cat4 mechanism on one or more selected carriers in the carrier set, and performing a fast LBT mechanism on the remaining carriers; alternatively, the fast LBT mechanism is performed on a selected one or more carriers in the set of carriers, and the LBT Cat2 mechanism is performed on the remaining carriers.

Further, in the case that a specified LBT Cat4 mechanism or a fast LBT mechanism is performed on each carrier in the carrier set, determining to acquire the channel usage right includes:

under the condition that the appointed LBT Cat4 mechanism or the rapid LBT mechanism is completed on each carrier in the carrier set, judging to acquire the use right of the carrier successfully completing the appointed LBT Cat4 mechanism or the rapid LBT mechanism; or the like, or, alternatively,

in the carrier set, a carrier that is about to complete the specified LBT Cat4 mechanism or fast LBT mechanism, if the current random backoff value N satisfies the preset threshold, stopping the LBT process on other carriers that are executing the specified LBT Cat4 mechanism or fast LBT mechanism, and immediately executing the LBT Cat2 mechanism; under the condition that the carrier corresponding to the LBT process is completed on each carrier, the transmission equipment judges to acquire the use right of the carrier successfully completing the LBT process; or the like, or, alternatively,

under the condition that a designated LBT Cat4 mechanism or a rapid LBT mechanism is completed on a part of carriers in a carrier set and a current random backoff value N on the carrier which does not complete the designated LBT Cat4 process or the rapid LBT mechanism meets a preset threshold value, judging to acquire the use right of the carrier which successfully completes the LBT process; or the like, or, alternatively,

if the last or several consecutive times of CCA detection channel idleness on the carrier that does not complete the specified LBT Cat4 procedure or the fast LBT mechanism before the start of the transmission time, the transmitting device determines the usage right of the acquired carrier.

Further, when performing the specified LBT Cat4 mechanism on one or more carriers selected from the carrier set is about to succeed, determining to acquire the channel usage right in case of performing the LBT Cat2 mechanism on the remaining carriers comprises:

when the designated LBT Cat4 mechanism is executed on one carrier selected from the carrier set to be successful, an LBT Cat2 mechanism is executed on the rest carriers, and when each carrier finishes the respective corresponding LBT process, the use right of the carrier which successfully finishes the LBT process is judged to be obtained; alternatively, the first and second electrodes may be,

when the designated LBT Cat4 mechanism is executed on a plurality of carriers selected in the carrier set to be successful at the same time, the LBT Cat2 mechanism is executed on the rest carriers, and when each carrier finishes the respective corresponding LBT process, the use right of the carrier which successfully finishes the LBT process is judged to be obtained; alternatively, the first and second electrodes may be,

and executing a specified LBT Cat4 mechanism on a plurality of carriers selected in the carrier set, if at least one carrier is about to complete the specified LBT Cat4 mechanism, executing an LBT Cat2 mechanism on the rest carriers, and when each carrier completes the respective corresponding LBT process, judging to acquire the use right of the carrier which successfully completes the LBT process.

Further, in the case that a specific LBT Cat4 mechanism is performed on one or more selected carriers in the carrier set, and a fast LBT mechanism is performed on the remaining carriers, determining to acquire the channel usage right includes:

executing a specified LBT Cat4 mechanism on a selected carrier in the carrier set, and under the condition of executing a rapid LBT mechanism on the rest carriers, if the corresponding LBT process is completed on each carrier before the transmission starts, judging to acquire the use right of the carrier successfully completing the LBT process; alternatively, the first and second electrodes may be,

executing a specified LBT Cat4 mechanism on a selected carrier in a carrier set, and under the condition of executing a rapid LBT mechanism on the rest carriers, if the corresponding LBT process is not completed on part of carriers before the transmission starts on each carrier, if the current random backoff value N on the carriers without the LBT process meets a preset threshold value, determining to acquire the use right of the carrier successfully completing the LBT process; alternatively, the first and second electrodes may be,

executing a specified LBT Cat4 mechanism on a selected carrier in the carrier set, and under the condition of executing a rapid LBT mechanism on the rest carriers, if the corresponding LBT process is not completed on part of carriers before the transmission starts on each carrier, if the CCA on the carrier without the LBT process is detected to be idle for the last time or a plurality of continuous last times, judging to acquire the use right of the carrier successfully completing the LBT process; alternatively, the first and second electrodes may be,

executing a designated LBT Cat4 mechanism on a plurality of carriers selected in a carrier set, under the condition of executing a rapid LBT mechanism on the rest carriers, if a random back-off value N of a corresponding LBT process on one carrier meets a specific threshold value, stopping respective LBT process on the rest carriers, and immediately executing an LBT Cat2 mechanism; if each carrier finishes the corresponding LBT process before the transmission starts, judging to acquire the use right of the carrier which successfully finishes the LBT process; alternatively, the first and second electrodes may be,

executing a specified LBT Cat4 mechanism on a plurality of carriers selected in a carrier set, and under the condition of executing a rapid LBT mechanism on the rest carriers, if the carriers complete the corresponding LBT process before the transmission begins, sending a reservation signal or executing self-delay operation; if the carrier which does not complete the corresponding LBT process still does not complete the LBT process at the transmission starting moment, judging that a current random back-off value N on the carrier meets a specific threshold value or a CCA detection channel is idle for the last time or a plurality of times of last continuous times, and judging that the use right of the carrier which successfully completes the LBT process is obtained; alternatively, the first and second electrodes may be,

executing a specified LBT Cat4 mechanism on a plurality of carriers selected in a carrier set, and under the condition of executing a rapid LBT mechanism on the rest carriers, if each carrier carries out channel competition access according to the respective LBT mechanism, if the carrier finishes the corresponding LBT process before the transmission starting time, the transmission equipment judges to acquire the use right of the carrier which successfully finishes the LBT process; alternatively, the first and second electrodes may be,

executing a specified LBT Cat4 mechanism on a plurality of carriers selected in a carrier set, and under the condition of executing a rapid LBT mechanism on the rest carriers, if each carrier carries out channel competitive access according to the respective LBT mechanism, and if the LBT process is not completed on the carrier before the transmission starting time, if the current random back-off value N on each carrier meets the carrier with a preset threshold value, or the CCA detection channel is idle for the last time or last continuous times, the transmission equipment judges that the use right of the carrier which successfully completes the LBT process is obtained; alternatively, the first and second electrodes may be,

executing a specified LBT Cat4 mechanism on a plurality of carriers selected in a carrier set, and under the condition of executing a rapid LBT mechanism on the rest carriers, if a random back-off value N on a carrier meets a first threshold value, adjusting the random back-off values N on other carriers to the first threshold value; if the random backoff value N on the carrier after the adjustment of the random backoff value N meets the second threshold value, adjusting the random backoff values N on the other carriers 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 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 meets the carrier with the preset threshold value, or if the CCA detection channel is idle for the last time or last continuous times, the transmission device determines to acquire the usage right of the carrier successfully completing the LBT process.

Further, the multi-carrier contention access method provided in the embodiment of the present application further includes:

executing a processing flow according to a preset mode under the condition that a Listen Before Talk (LBT) mechanism competes for a carrier failed in accessing a channel or a data packet to be transmitted on the carrier; wherein, the preset mode includes one of:

dropping carriers that failed to perform LBT or dropping transmissions on carriers;

retransmitting a data packet on a carrier on which LBT fails;

transmitting the data packet on the alternative resource on the carrier wave which is successfully competed;

using a backup unlicensed carrier; multiplexing the same resources on other carriers to transmit respective data packets together;

different data are sent on the same resource, and if a Rank Indicator (RI) is greater than 2, the resource may be multiplexed for transmission, or different data blocks may be sent on the same resource through Random Access Radio Network Temporary Identifier (RNTI) or Cyclic Shift (CS) coding.

Example two

In this embodiment, a multi-carrier contention access method is provided, where the process includes the following steps:

step S1, obtaining a carrier set for performing a listen before talk LBT mechanism according to a first preset condition;

the multi-carrier contention access method provided by the embodiment of the application can be applied to a Long Term Evolution (Long Term Evolution, LTE/LTE-a for short) system, and especially can be applied to carrier services of unlicensed spectrum.

Wherein: the first preset condition includes: a base station indication; or, the base station indication is combined with User Equipment (UE) selection; or, the user equipment UE autonomously selects; alternatively, it is predefined. That is, in the process of acquiring a carrier set for performing a Listen Before Talk (Listen Before Talk, LBT for short) mechanism, different modes are included for the base station side and the terminal side, respectively.

For the base station side, the base station may determine the carriers 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 UE measurement report.

For the terminal side, the acquired carrier set may include: the base station indicates carriers in a specific carrier set, or the UE randomly selects or predefines carriers in the specific carrier set from the carrier set indicated by the base station, or the UE autonomously selects carriers in the specific carrier set.

Step S2, according to a preset scheduling manner, performing contention access of a channel in the carrier set according to a second preset condition.

In the embodiment of the present application, the contention access of the channel is divided into two categories, i.e., category one, according to a second preset condition in a manner of performing contention access of the channel, and the contention access of the channel is performed on each carrier in the carrier set according to the same listen before talk LBT mechanism; and in the second category, the competitive access of the channel is performed on each carrier in the carrier set according to different Listen Before Talk (LBT) mechanisms. Wherein, the preset scheduling mode comprises: self-carrier scheduling mode or cross-carrier scheduling mode.

The self-carrier scheduling mode is that when a base station executes a downlink LBT mechanism to compete to the use right of an unauthorized carrier and sends uplink authorization information on the unauthorized carrier, User Equipment (UE) executes uplink channel competition access on a corresponding carrier set after receiving the uplink authorization information;

the cross-carrier scheduling mode is that when the base station does not need to execute a downlink LBT mechanism but sends uplink authorization information through an authorized carrier, after receiving the uplink authorization information, the user equipment UE executes uplink channel contention access on a corresponding carrier set.

Specifically, the multi-carrier contention access method provided in the embodiment of the present application, when the scheduling manner is a self-carrier scheduling manner, and under the condition of category one in step S104, specifically includes the following steps:

preferably, according to category one in step S104, performing contention access of the channel according to the same listen before talk, LBT, mechanism on each carrier in the carrier set includes:

user Equipment (UE) performs channel contention access on each carrier according to a specified Listen Before Talk (LBT) mechanism;

the specified listen before talk LBT mechanism comprises one of: LBT Cat2 mechanism; enhanced LBT Cat2 mechanism; a configured LBT Cat4 mechanism for long time to perform LBT procedure but small random backoff value N; a fast listen before talk, LBT, mechanism; wherein the fast listen before talk LBT mechanism comprises one of: a delay period + Extended clean Channel Assessment (defer period + ECCA, defer period + Extended Clear Channel Assessment) procedure, or a direct Extended clean Channel Assessment ECCA procedure.

Performing channel competitive access on each carrier according to a specified listen-before-talk mechanism; wherein, the specified Listen Before Talk mechanism (Listen Before Talk, LBT for short) includes at least one of the following: an LBT Cat2 mechanism, an enhanced LBT Cat2 mechanism, an LBT Cat4 mechanism, or a fast listen-before-talk LBT mechanism, wherein the fast listen-before-talk LBT mechanism comprises at least one of: a delayed defer period + ECCA mechanism or procedure or a direct ECCA mechanism.

Specifically, the specified listen before talk LBT mechanism is as follows:

class 1: LBT mechanism without random backoff, i.e., LBT Cat2 mechanism. A Clear Channel Assessment (CCA) detection duration may be configured as one of: 34us, 25us, 20us, 18us, 16us, 9us or 10 us. Wherein: the granularity of CCA detection within the CCA detection duration may be 4us or 9 us. And if the continuous idle time of the detection channel is the detection duration of one of the configurations, the transmission equipment considers that the use right of the unauthorized carrier is acquired. Or, if the detection channel is from busy to idle and the continuous detection channel idle time is the detection duration of one of the above configurations, the transmission device considers that the usage right of the unlicensed carrier is acquired. Alternatively, if the estimated channel is detected to be busy during the detection time of one of the above configurations, the channel or the unlicensed carrier is considered to be unavailable. Here, the location where the transmitting device performs LBT Cat2 is fixed. Preferably, the fixed location is a CCA detection duration location of at least one of the above configurations prior to a subframe boundary. If the fixed location is too far forward, it may result in early completion of the LBT Cat2 procedure, requiring either an initial signal or a reserved signal to be sent, which may result in system inefficiency. In another aspect, multiple transmitting devices configure the same fixed CCA detection position of LBT Cat2, which is beneficial for multiplexing. If there is a certain time delay between different transmission devices, it may happen that the CCA position is advanced and the channel is always occupied with priority in a very high way, while the CCA position is behind and the channel is always blocked. To address this issue, the enhanced LBT Cat2 mechanism proposed in class 2 may be employed.

Class 2: LBT mechanism without random backoff, i.e., enhanced LBT Cat2 mechanism. The difference from class 1 is that devices in different operators or different devices in the same operator may start CCA detection at different fixed time periods among K time periods divided in advance, where each of the K time periods may serve as a starting point of CCA detection of a device, or randomly select one time period among the K time periods as a starting point of CCA detection. And executing CCA detection according to a fixed CCA detection starting point or a randomly selected CCA detection starting point, and determining that the device acquires the use right of the channel as long as the detection channel is from busy to idle and the continuous detection channel idle time is not less than the CCA detection time length, or as long as the continuous idle time of the detection channel is not less than the CCA detection time length. Wherein: the CCA detection time period may be configured to be one of 34us, 25us, 20us, 18us, 16us, 9us, or 10 us. The granularity of CCA detection within the CCA detection duration may be 4us or 9 us. For devices under different operators, different CCA detection starting points may be configured, or a CCA detection starting point may be randomly selected. For devices under the same or different operators, different devices may configure different CCA detection starting points, or may randomly select a CCA detection starting point. The method aims to solve the problem that one party cannot compete for the channel all the time due to the problem of collision among devices.

Class 3: defer period + ECCA procedure, i.e. fast LBT mechanism. The Defer period delay period is the value of 16us plus n times one slot. n is an integer greater than 0 and slot is 9 us. The brief defer period + ECCA procedure is: the CCA detection of the defer period duration is executed firstly, when the channel is detected to be idle in the defer period, the equipment enters the ECCA random backspacing process, and in the ECCA random backspacing process, when the channel is detected to be idle in one slot time, the equipment enters the next slot detection. Otherwise, when the channel is detected to be busy in the slot time, the device enters into the defer period. And detecting the idle channel in slot time in the ECCA random backspacing process, and executing a certain numerical value decreasing operation on the random backspacing value N. And the device considers that the use right of the channel is acquired until the random backoff value N is decreased to 0. Preferably, the decrement is 1, but is not limited to this value. N may be predefined, or indicated by the base station, or generated randomly. Optionally, in the defer period, as long as the channel is detected to be idle in N9 us slots, the value N may also perform a decrement operation. Alternatively, if the channel is idle for the entire defer period, N performs a decrement operation by a certain amount. For example: the defer period consists of 16us and 3 slots, and N may perform a decrement 1 operation when the channel is detected to be idle for the entire defer period, or N may perform a decrement 3 operation. The decreasing value may be the same as the value of n.

Furthermore, the fast LBT mechanism also includes a direct ECCA procedure. 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 detection. In the ECCA random back-off process, if the channel is detected to be idle in one slot time, the device enters the next slot detection. On the contrary, when the channel is detected to be busy in the slot time, optionally, the device enters a defer period or enters the next slot detection. When the channel is detected to be idle in the slot time or the channel is detected to be idle in the defer period, the random backoff value N may be decremented by a certain amount. And until the N is decreased to 0, the equipment considers that the use right of the channel is acquired.

Class 4: there is a random back-off LBT mechanism, i.e., LBT Cat4 mechanism. The difference from class 3 is that the device needs to perform first CCA detection, and if the channel is detected to be idle, the device enters a first defer period detection period, and if the channel is idle in the first defer period detection period, the device considers that the usage right of the channel is acquired. And if the device executes that the first CCA detection channel is busy, the device enters a second defer period detection period, and if the channel in the second defer period detection period is idle, the device judges whether the current N value is 0. If N is 0, the device considers that the use right of the channel is acquired. If N is not 0, then a decrement of N is performed or no operation is performed on N. And then, detecting the busy and idle channels of the channels in the slot time in the ECCA, and if the channels are detected to be idle in the slot time, the equipment enters the next slot channel detection. If the channel is detected to be busy in the slot time, the device enters a second defer period detection period, and the above is repeated until the random backoff value N is decreased to 0, and the device considers that the use right of the unauthorized carrier wave is successfully acquired.

Wherein: for the LBT Cat4 used in the uplink, the maximum contention window size is smaller than the contention window used in the downlink. For the self-scheduling case, the maximum contention window may be selected from the set 3,4,5,6,7,8,9,10,11,12,13,14, 15. For cross-carrier scheduling, the maximum contention window must be larger than that of self-scheduling, such as: the maximum contention may be selected from the set 15, 31,63, 255, 511.

Here, the maximum contention window of the LBT Cat4 in the embodiment of the present application is only given by way of example, and is subject to implementation of the multi-carrier contention access method provided in the embodiment of the present application, which is not limited specifically.

performing an LBT Cat2 mechanism successfully on S carriers in K carriers, and when performing the LBT Cat2 mechanism fails on the rest carriers, if the total number of the carriers successfully performing the LBT Cat2 mechanism does not meet the specific number of the carriers, processing according to a preset mode;

wherein carriers are randomly selected to satisfy a specific number of carriers among carriers failing to perform the LBT Cat2 mechanism; or, directly evaluating that the transmission equipment acquires the use right of the carrier on the carrier which fails to execute the LBT Cat2 mechanism; if the total number of carriers successfully performing the LBT Cat2 mechanism satisfies a specific number of carriers, the transmission device uses or considers to acquire the use right of the carrier successfully completing the LBT Cat2 mechanism.

Specifically, if the user performs LBT Cat2 successfully on each carrier, that is, performs CCA detection once to evaluate that the channel is idle, the user equipment regards to acquire the usage rights of the unlicensed carriers for detecting that the channel is idle. And for the carrier failing to perform the LBT Cat2, the user equipment gives up using the carrier failing to perform the LBT Cat2 procedure.

In the LBT Cat2 mechanism, there are two ways for the LBT to be considered successful or obtain unauthorized use right: mode 1: and if the channels are idle within the CCA detection time length, the LBT Cat2 is considered to be successfully executed, namely the use right of the unlicensed carrier is obtained. As long as the channel is busy within the CCA detection duration, it is considered that LBT Cat2 fails, that is, the use right of the unlicensed carrier cannot be obtained. Mode 2: in the available channel access time period, as long as the channel is from busy to idle and the time length of the detection channel being continuously idle meets the CCA detection time length, or as long as the time length of the detection channel being continuously idle meets the CCA detection time length, the LBT Cat2 is considered to be successful, that is, the usage right of the unlicensed carrier is acquired.

For contention access over multiple carriers, the transmitting device may start performing the LBT Cat2 mechanism on multiple carriers simultaneously, i.e. the starting point for performing CCA detection is the same. In the case of the enhanced LBT Cat2, for different transmission devices (UEs or base stations) in the same operator or transmission devices in different operators, different CCA detection start positions may be configured on multiple carriers to be aggregated respectively or the CCA detection start position may be selected randomly, so as to prevent a phenomenon that one party can always compete for a channel and the other party is blocked, thereby resulting in an unfair contention access problem. The same method is also applicable to processing of different base stations under the same operator or base stations under different operators in the downlink multi-carrier LBT.

Specifically, an available contention access time region is divided into K CCA detection time periods in advance; and the transmission equipment in different operators or different transmission equipment in the same operator are used as the starting points of respective CCA detection in the K time periods according to the starting points of the fixed different time periods. And if the channel is detected to be idle from busy, and the continuous channel detection idle time is greater than or equal to the CCA detection time length, or the continuous channel detection idle time is greater than or equal to the CCA detection time length, the device is considered to acquire the use right of the channel.

Specifically, an available contention access time region is divided into K CCA detection time periods in advance; and the transmission devices in different operators or different transmission devices in the same operator randomly select the starting point of each CCA detection time period as the starting point of the CCA detection in the K time periods. And if the channel is detected to be idle from busy, and the continuous channel detection idle time is not less than the CCA detection time length, or the continuous channel detection idle time is greater than or equal to the CCA detection time length, the device is considered to acquire the use right of the channel. In a multi-carrier scenario, CCA detection start positions on each carrier may be the same or different for transmission devices in different operators or different transmission devices within the same operator. Further, in a case that the specified listen before talk LBT mechanism is a fast listen before talk LBT mechanism, performing contention access on a channel according to the specified listen before talk LBT mechanism on each carrier includes:

Assuming that a listen-before-talk (LBT) mechanism is performed on P (total number of carriers) carriers, if an LBT procedure is performed on the P carriers simultaneously and a random backoff value N in the P carriers is decremented by 0, it is considered that a use right of the carriers is obtained. Or, the transmission device only obtains the usage right of the carrier that completes the operation of decreasing N to 0 before the scheduled subframe or subframe boundary or the preset transmission starting time point starts. Or, when the random backoff values N on the P carriers are all decreased to the specific threshold value, the P carriers simultaneously execute one LBT Cat2, the carrier in the LBT Cat2 process is successfully completed, and the transmission device considers that the usage right of the carrier is acquired. Or when the random back-off values N on the K carriers are all decreased to a specific threshold value, the random back-off values of the fast LBT mechanism executed on the P-K carriers are frozen, the LBT Cat2 executed on the carriers is triggered, the carriers in the LBT Cat2 process are successfully completed, and the transmission device considers that the use right of the carriers is acquired. Or when the random backoff values N of S carriers of a specific number among the K carriers are all decreased to a specific threshold value, freezing the random backoff values of the carriers other than the S carriers, or stopping the LBT process on the carriers other than the S carriers, triggering the carriers other than the S carriers to execute the LBT Cat2, successfully completing the carrier in the LBT Cat2 process, and the transmission device considers that the usage right of the carrier is obtained. Wherein, the CCA detection is continuously executed on the carrier which is firstly decreased to a specific threshold, but the N value is not decreased.

The multi-carrier contention access method provided in the embodiment of the present application is described only by taking the above parameters as an example, and is not particularly limited to the implementation of the multi-carrier contention access method provided in the embodiment of the present application.

the fast LBT mechanism is performed on the selected one or more carriers, and the LBT Cat2 mechanism is performed on the other carriers in the set of carriers when the fast LBT procedure is about to be completed on the one or more carriers. Further, when the fast LBT mechanism is to be completed on the selected one or more carriers, performing the LBT Cat2 mechanism on other carriers in the carrier set includes:

performing the LBT Cat2 mechanism on each carrier in the set of carriers; or the like, or, alternatively,

performing a configured long-time but relatively small random backoff value N LBT Cat4 or fast LBT mechanism on each carrier in the set of carriers to perform the LBT procedure; or the like, or, alternatively,

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 process;

alternatively, the first and second electrodes may be,

performing the LBT Cat2 mechanism on the remaining carriers when performing the specified LBT Cat4 mechanism on the selected one or more carriers in the carrier set is about to succeed;

alternatively, the first and second electrodes may be,

performing a specific LBT Cat4 mechanism on one or more selected carriers in the carrier set, and performing a fast LBT mechanism on the remaining carriers;

alternatively, the first and second electrodes may be,

the fast LBT mechanism is performed on a selected one or more of the carriers in the set of carriers and the LBT Cat2 mechanism is performed on the remaining carriers.

Specifically, under the condition that the fast LBT mechanism includes a delayed defer period + ECCA procedure or a direct ECCA procedure, performing contention access of a channel according to the fast LBT mechanism on K carriers specified in a specified carrier set, and performing contention access of the channel according to an LBT Cat2 mechanism on the remaining carriers in the specified carrier set includes:

performing channel contention access on K carriers designated in the designated carrier set according to a defer period + ECCA process or a direct ECCA process, and performing channel contention access on the rest carriers in the designated carrier set according to an LBT Cat2 mechanism; wherein: and triggering the LBT Cat2 mechanism to be executed on the other carriers when the defer period + ECCA process or the direct ECCA process is about to be completed on the K carriers. Alternatively, the first and second electrodes may be,

if the defer period + ECCA process is to be completed on one carrier of the K carriers, freezing a current random backoff value by the K-1 carriers or stopping the defer period + ECCA process on the K-1 carriers, executing an LBT Cat2 mechanism, and starting to execute an LBT Cat2 mechanism on carriers except the K carriers;

and if the LBT process is successfully completed on each carrier according to the respective LBT mechanism, determining to acquire the use right of the unauthorized carrier corresponding to the successful completion of the LBT process.

Specifically, K is assumed to be a value of 1 or more and less than the total carrier number P. The K carrier methods for performing the fast LBT mechanism are selected as above. Fast LBT mechanisms, such as: defer period + ECCA procedure (denoted as fast LBT mechanism 1), direct ECCA procedure (denoted as fast LBT mechanism 2).

Taking the fast LBT mechanism 1 as an example to describe the multi-carrier contention access method of this embodiment, the transmission device performs contention access of the channel on the specific K carriers according to the defer period + ECCA procedure, and performs contention access of the channel on the remaining carriers according to the LBT Cat2 mechanism. If the defer period + ECCA process 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 defer period + ECCA process on the carrier thereof, and then execute the LBT Cat2 mechanism. And meanwhile, the LBT Cat2 mechanism is started to be executed on carriers except the K carriers, and if the transmission equipment successfully completes the LBT process on each carrier according to the respective LBT mechanism, the transmission equipment is considered to acquire the use right of the carrier corresponding to the successful completion of the LBT process. Alternatively, the first and second electrodes may be,

when the defer period + ECCA procedure is to be completed on each of the K carriers, the LBT Cat2 mechanism is performed on the remaining carriers. And on the carrier wave with the idle channel, the transmission equipment considers that the use right of the carrier wave is acquired. Wherein the completion of the respective LBT procedure on each carrier must be completed before the start of the subframe or the subframe boundary or the transmission start time of the scheduling user equipment. Here, that all the K carriers are to be completed means that when all the random backoff values N on the K carriers decrease to a specific threshold, the LBT Cat2 mechanism is triggered to be executed on other carriers. If the random back-off value N of at least one of the K carriers is decreased to a specific threshold, the carrier continues to perform channel idle detection at this time, but does not perform N value decrease until all N values of the K carriers are decreased to the specific threshold, and the carriers except the K carriers are triggered to perform LBT Cat 2. The particular threshold value may be predefined or may be indicated by the base station or may be a value rounded at M less than N times the value of N, where M is less than N, or may be randomly selected within a range less than N. In a special case, the specific threshold may be 0, that is, when the value of N on the K carriers decreases to 0, the LBT Cat2 on the other carriers is triggered. Alternatively, the first and second electrodes may be,

the defer period + ECCA mechanism is performed on carriers with odd carrier indices and the LBT Cat2 mechanism is performed on carriers with even carrier indices. The method of triggering the LBT Cat2 on even carriers is the same as above. Alternatively, the first and second electrodes may be,

and triggering the LBT Cat2 to be executed on other carriers when the number of carriers to finish the defer period + ECCA in the K carriers reaches a specific threshold value which is less than or equal to K. Wherein the imminent completion of LBT Cat4 is referred to as above.

If the LBT Cat4 mechanism is used in the embodiment of the present application, if the uplink employs the LBT Cat4, the size of the maximum contention window should be smaller than the contention window employed by the downlink. For the self-scheduling case, the maximum contention window may be selected from the set 3,4,5,6,7,8,9,10,11,12,13,14, 15. While for cross-carrier scheduling, the size of the maximum contention window may be larger than that of the self-scheduling, and its maximum contention may be selected from the set 15, 31,63, 255, 511. Wherein: the random backoff value N may be generated independently on each carrier, or the base station may instruct the UE to use the random backoff value N on each carrier, or may predefine the random backoff value N used on each carrier. The random backoff value N on each carrier may be the same or different.

Specifically, in the case that the specified listen-before-talk LBT mechanism is the LBT Cat4 mechanism, the step of performing contention access on the channel on each carrier according to the specified listen-before-talk LBT mechanism includes at least one of the following steps:

on a carrier wave which completes the LBT Cat4 process for the first time, if the moment when the LBT Cat4 process is successfully completed does not reach the transmission starting moment or the subframe boundary, a reservation signal is sent on the carrier wave;

if the LBT Cat4 process is not completed on other carriers, the CCA detection is continuously executed;

if the LBT Cat4 process is not completed on the carriers in the designated carrier set at the beginning of the transmission time or the subframe boundary or the end of the specified time period for CCA detection, the carriers are abandoned; or, if the current random backoff value N on the carrier decreases to a preset threshold value, determining to acquire the use right on the carrier;

specifically, on a carrier that first completes the LBT Cat4 mechanism, if the time for successfully completing the LBT mechanism does not reach the transmission start time or the subframe boundary, the transmission device may send a reservation signal (may send a reservation signal of a specific listening pattern) or send an initial signal on the carrier, may notify the carrier condition of successful preemption or seize a channel, or other functions. CCA detection is performed without continuation of the LBT procedure being completed on the other carriers. If the LBT process is still not completed on some carriers at the beginning of transmission time or at the boundary of a subframe or at the end of a specified time period for CCA detection, the carrier is either abandoned or whether the current random backoff value N on the carrier meets a certain threshold value is evaluated, and if yes, it is considered that the use right on the carrier is acquired. And the transmitting device may use all carriers that successfully completed the LBT Cat4 procedure for transmission of information. Such as: and sending uplink data or downlink data.

Or, if the LBT Cat4 procedure is completed on the carriers in the designated carrier set and the transmission start time or the subframe boundary is not reached, performing a self-delaying operation;

specifically, if the transmitting device has completed the LBT Cat4 procedure on a certain carrier and does not arrive at the start transmission time or the subframe boundary, the transmitting device may perform a self-delaying operation. Wherein the time granularity of the self-delay may be a slot length. The transmitting device may continue to perform the ECCA procedure from the LBT successful time to the transmission start time or the subframe boundary, i.e. to regenerate a value of N, where the maximum value of N needs to be determined according to the remaining time and the slot length 9 us. Or, the LBT Cat2 mechanism is executed for multiple times, and it is considered that the usage right of the carrier is acquired as long as the number of times of detecting the channel idle in multiple LBT cats 2 meets a certain threshold, or as long as the last LBT Cat2 execution is successful. CCA detection continues on the carrier on which the LBT Cat4 procedure was not completed before the start of the transmission time instant or the start of the specified time instant at which transmission was started. If the carrier still completes the LBT Cat4 process at the specified transmission start time or subframe boundary, the carrier is either abandoned or further judged whether the current random backoff value N meets a certain threshold value, and if so, the use right of the carrier is considered to be obtained. Or, detecting whether the channel is idle or not in the last CCA detection, and if the channel is idle, determining that the use right of the carrier is acquired.

Or when the random backoff value N of the carrier that completes the LBT Cat4 procedure is decreased to the preset threshold, the random backoff values in LBT Cat4 procedures on other carriers are adjusted to the preset threshold;

if the carrier wave of the LBT process is completed before the transmission time or the subframe boundary is started, judging to acquire the use right of the unauthorized carrier wave which successfully completes the LBT Cat4 process;

if the carrier does not complete the LBT process and the last CCA detection channel on the carrier is idle, or the current random backoff value N on the carrier is at the preset threshold, determining to acquire the use right of the carrier.

Specifically, when the random backoff value N is decreased to a certain threshold value, the carrier that is about to complete the LBT Cat4 starts the self-delay, the time granularity of the self-delay is one slot length (9us), the channel is detected to be idle during the self-delay, and the random backoff value N is not decreased. The purpose is to wait for LBT procedures on other carriers. The number of self-delays at each time may be predefined, or the continuous or discrete number of self-delays may be adjusted according to a statistical value of the number of LBT successes or failures when the self-delays are counted in a previous period of time, or the number of self-delays may be determined according to a distance from the time to a subframe boundary or a remaining time of a transmission start time of the subframe, or the number of self-delays may be determined according to LBT execution conditions on other carriers. Through the above operation, information transmission can be performed on the carrier where the LBT procedure is completed at the subframe boundary or the transmission start time. And the failed carrier is abandoned, or if the final N value is not decreased to 0 due to the self-delay of the carrier, the N value at the moment can be further determined to meet a certain threshold value, and if the N value meets the certain threshold value, the user equipment is considered to be capable of using the carrier. Or the number of times of channel detection busy is large due to poor channel condition or serious interference, so that the N value is decreased slowly, and it is further determined that the channel is detected to be idle during the last CCA detection, and/or the current random backoff value N satisfies a certain threshold, the user equipment is considered to be able to use the carrier.

If one carrier is about to complete the LBT Cat4 procedure, or if the random backoff value on one carrier is decreased to a certain threshold value first, the random backoff values on other carriers are adjusted to the current N value on the carrier about to succeed. Therefore, each carrier can complete the LBT process with extremely high probability, and the use right on the corresponding carrier is acquired. A plurality of threshold values may be set, and when one threshold value is satisfied, the random back-off values on all carriers are adjusted to the current random back-off value on the carrier which satisfies the threshold value first. And if the random backoff value is decreased to 0, the transmission equipment considers that the use right of the carrier is acquired, and the random backoff value can be used for information transmission. Or, the random backoff value on the carrier satisfies a preset threshold, which may also be considered to acquire the use right of the carrier, and may perform information transmission.

Or, configuring the same random backoff value N on each carrier, and performing a decrementing operation on the random backoff value N when channel idle is detected on each carrier. The LBT Cat4 procedure is completed on all carriers before multiple unlicensed carriers can be used.

In the embodiment of the present application, the contention access mode of the channel of the fast LBT mechanism is the same as the processing mode of the LBT Cat4 mechanism, that is, according to the defer period + ECCA procedure and the direct ECCA procedure. The fast LBT mechanism is adopted to make the transmitting device complete the contention access of the channel as fast as possible on multiple carriers to acquire the use right of the channel. In the above LBT scheme with random backoff, the value of N is an integer between 0 and q, and q is a value between the minimum contention window and the maximum contention window. Here, the minimum contention window for uplink is 1, and the maximum contention window size may be selected from the {3,4,5,6,7,8,9,10,11,12,13,14,15, 16, 17, 31,63, 255,511 } set.

Furthermore, the data packets transmitted by the transmitting device on each carrier may be the same, or may be different. And, the resource location and resource block size allocated to the transmission device on each carrier may be the same or different.

In each of the above cases, if an LBT procedure is about to be completed on one carrier, the other carriers may perform an LBT Cat2 mechanism, wherein the detection duration may be an integer multiple of 9 us. The detection duration is related to the current value N of the LBT procedure to be completed, for example, the random backoff value N in the LBT procedure on carrier 1 is decremented to 2, the LBT Cat2 is executed on the other carriers, the CCA detection duration may be 9us, 18us or a multiple of 9us, and the maximum value cannot exceed the duration from the current time to the subframe boundary.

Specifically, if one carrier of K carriers in the designated carrier set is to complete LBT Cat4, the remaining K-1 carriers in the designated carrier set freeze the current random backoff value, or stop the LBT Cat4 process on the carrier, and execute the LBT Cat2 mechanism; and starting to execute the LBT Cat2 mechanism on carriers except K carriers in the appointed carrier set; alternatively, the first and second electrodes may be,

when the LBT Cat4 procedure is to be completed on K carriers in the designated carrier set, respectively, performing the LBT Cat2 mechanism on other carriers in the designated carrier set;

wherein, the fact that the LBT Cat4 procedure is to be completed on all the K carriers means that when the random backoff values N on all the K carriers decrease to a preset threshold, the LBT Cat2 mechanism is triggered to be executed on other carriers in the designated carrier set.

Specifically, a carrier set for performing channel contention access according to the LBT Cat4 mechanism is selected first, and may be randomly selected, predefined, or indicated by the base station, or the channel condition on each carrier reported by the UE is determined by the base station, or the UE autonomously determines according to the interference condition.

The transmission device performs contention access of the channel according to the LBT Cat4 mechanism on 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 procedure on their carriers, and instead execute the LBT Cat2 mechanism. The LBT Cat2 mechanism is also performed starting on carriers other than the K carriers. If the transmission device successfully completes the LBT procedure on each carrier according to the respective LBT mechanism, it is considered that the use right of the carrier corresponding to the successful completion of the LBT procedure is obtained. Alternatively, the first and second electrodes may be,

the LBT Cat2 mechanism is performed on the remaining carriers, just before the LBT Cat4 procedure is completed on each of the K carriers. And on the carrier with the detected idle channel, the transmission equipment considers the use right of the carrier. Wherein, the respective LBT procedure must be completed on each carrier before the start of the subframe or the subframe boundary or the transmission start time of the scheduling user equipment. Here, that all the K carriers are to be completed means that when all the random backoff values N on the K carriers decrease to a specific threshold, the LBT Cat2 mechanism is triggered to be executed on other carriers. If the random back-off value N of at least one of the K carriers is decreased to a specific threshold, the carrier continues to perform channel idle detection at this time, but does not perform N value decrease until all N values of the K carriers are decreased to the specific threshold, and the carriers except the K carriers are triggered to perform LBT Cat 2. The particular threshold value may be predefined or may be indicated by the base station or may be a value rounded at M less than N times the value of N, where M is less than N, or may be randomly selected within a range less than N. Alternatively, the first and second electrodes may be,

the LBT Cat4 mechanism is performed on carriers with odd carrier indices and the LBT Cat2 mechanism is performed on carriers with even carriers. The method of triggering the LBT Cat2 on even carriers is the same as above. Alternatively, the first and second electrodes may be,

the number of carriers to complete LBT Cat4 among the K carriers reaches a specific threshold, which is less than or equal to K, triggering other carriers to perform LBT Cat 2. Wherein the imminent completion of LBT Cat4 is referred to as above. K is a number of 1 or more.

The starting time for performing the LBT procedure on each carrier is the same or different. The random back-off value on each carrier may be configured to be the same value, or may be generated independently.

If the LBT process is executed on all carriers according to respective LBT mechanisms at the same time, and the random backoff values N in all carriers are decreased by 0, determining to obtain the use right of the unauthorized carrier; alternatively, the first and second electrodes may be,

if the LBT process is completed on part of all carriers, the transmission equipment is considered to acquire the use right of the unauthorized carrier which successfully completes the LBT process; alternatively, the first and second electrodes may be,

if the random backoff values N on all the carriers are decreased to the specified preset value, all the carriers simultaneously execute an LBT Cat2, and the carriers in the LBT Cat2 process are successfully completed, the use right of the acquired carriers is determined; alternatively, the first and second electrodes may be,

when the random back-off values N on the K carriers are all decreased to a specified preset value, freezing the random back-off values on the carriers executing the rapid LBT mechanism, or stopping executing the LBT process on the carriers of the rapid LBT mechanism, triggering the carriers executing the LBT Cat2 on the carriers, successfully finishing the carriers of the LBT Cat2 process, and judging that the use right of the carriers is obtained; alternatively, the first and second electrodes may be,

when the random backoff values N on the S carriers of the specified number in the K carriers are decreased to a preset value, freezing the random backoff values on the carriers except the S carriers, or stopping an LBT process on the carriers except the S carriers, triggering the carriers except the S carriers to execute an LBT Cat2, and judging to acquire the use right of the carrier if the carrier of the LBT Cat2 process is successfully completed, wherein S is smaller than K; alternatively, the first and second electrodes may be,

when the random backoff value N on at least one carrier in all carriers is decreased to a specified preset value, freezing the current random backoff values on other carriers, or stopping executing the LBT process on the carrier corresponding to the LBT mechanism, triggering the carrier to execute the LBT Cat2, successfully finishing the carrier in the LBT Cat2 process, and judging that the use right of the carrier is obtained;

specifically, the method for selecting K carriers to execute the LBT Cat4 mechanism includes: the method comprises the steps of randomly selecting, predefining, indicating by a base station, reporting the channel condition of each carrier by UE, determining the mode by the base station, or determining by the UE according to the interference condition. Preferably, the channel interference situation is minimal over K carriers. K may be as small as 1.

The same random backoff value N may be used for each carrier, or random backoff values N may be generated for each carrier. The same value of N may be base station configuration or predefined. For the LBT Cat4 in the uplink, the maximum contention window size must be smaller than the contention window used in the downlink. Since the number of OFDM symbols for performing LBT procedure in uplink is limited, preferably, one OFDM symbol or 2 OFDM symbols, the maximum contention window can be selected from the set {3,4,5,6,7,8,9,10,11,12,13,14,15 }. Alternatively, greater than 2 OFDM symbols, the maximum contention window may be 31,63,125,255, 511.

retransmitting a data packet on a carrier on which LBT fails;

Specifically, if the data packets to be transmitted by the UE are transmitted in part on a plurality of specific carriers respectively. At this time, the data packet allocated on the carrier on which the LBT procedure failed to be performed cannot be transmitted. The portion of the packet may be retransmitted. Alternatively, the packet is transmitted on an alternative resource on the carrier on which the contention succeeds. Or, the spare carrier is enabled for transmission. Or multiplexing resources on other carriers for transmission, wherein different data are sent on the same resource, if RI is greater than 2, multiplexing the resource for transmission, or sending different data blocks on the same resource through RNTI or CS coding. Wherein, an additional (alternative) resource block is indicated on a certain carrier for transmitting data packets of other carriers when LBT fails. The trigger of the alternative resource is that the UE knows, at the time of starting data transmission or before the arrival of the subframe boundary, that there are carriers that have not successfully performed LBT Cat2 in the multiple carriers to be aggregated, and then triggers the standby resource on the carrier that successfully completes the LBT procedure. If the time when the user equipment completes the LBT procedure is less than the subframe boundary or the transmission starting time, the user equipment needs to send a reservation signal on all carriers completing the LBT procedure until the subframe boundary or the transmission starting time. In addition, if a plurality of UEs configure the same resource for packet transmission together, it is considered whether the channel environment between two UEs satisfies SU or MU conditions. If the user equipment fails to perform LBT Cat2 on all of the multiple carriers to be aggregated within the available channel contention access period, the user equipment gives up this transmission.

The above embodiments may be applied to multiple carrier groups, that is, each carrier group may employ the same LBT mechanism, or some of the carrier groups employ one LBT mechanism and the rest employ another LBT mechanism.

Further, in all the above embodiments, when the Gap time between the downlink transmission and the uplink transmission is less than 16us or 25us during self-carrier scheduling, the LBT procedure may not be performed on the uplink multiple carriers, or part of the multiple carriers may perform LBT Cat2, and part of the multiple carriers may not perform LBT. The reason is that the LBT Cat4 mechanism has already been executed on the carrier corresponding to the base station side, so from the perspective of guaranteeing contention access fairness between Licensed Assisted Access (LAA) and the channel of the WIFI system, the UE may not execute the LBT procedure. Further, to circumvent the hidden node problem, the UE side may perform the LBT Cat2 mechanism before transmitting. LBT Cat2 and no-LBT binding may also be used.

For the uplink, before the first subframe which may be used for uplink transmission or the first subframe which the UE starts to transmit, the contention access method adopted by the previous subframe on the carrier may also be adopted for the subsequent uplink subframe on each carrier, or the subsequent subframe still schedules the same UE, and its resource location may be the same or different, then the UE may not perform LBT, or only perform one LBT Cat2(CCA detection may perform detection on some muted RE patterns). If not, the same LBT mechanism as the previous subframe may be used, or a smaller window or a more simplified LBT scheme than the contention window of the LBT mechanism used in the previous subframe may be used.

The approach in the above embodiment may be applied to the cross-carrier scheduling case, where the base station side does not perform the LBT procedure. The self-carrier scheduling conditions are slightly different, because the base station side has already executed the LBT Cat4 or LBT Cat2 mechanism, and the UE side needs to properly adjust the contention access mechanism adopted on multiple carriers, thereby avoiding the disadvantage that the LAA system is in contention access channel when the LAA and WIFI systems coexist.

For the transmission of the authorization information and the carrier indication information of the UE side, the base station may notify the UE on which unauthorized carriers to perform channel contention access through a DCI on the authorized carriers, and resource allocation or scheduling information on each carrier; or the base station sends a plurality of sets of authorization information to the UE on the authorization carrier wave, wherein each set of authorization information corresponds to one carrier wave and the scheduling information of the user on the carrier wave respectively; or, the base station sends carrier information and scheduling information of the UE on the unlicensed carrier set on a specific carrier in the contended unlicensed carrier set, wherein: a DCI message containing the unlicensed carrier set of the contention access of the channel performed by the UE and scheduling information on each carrier can be sent on one unlicensed carrier; or, a plurality of DCI information may be transmitted on one unlicensed carrier, where each DCI information includes one carrier information and one scheduling information; or, the DCI information may be sent on each carrier that the base station contends to, where the DCI information sent on each carrier includes one carrier information and one scheduling information.

EXAMPLE III

In addition, the multi-carrier contention access method provided in the embodiment of the present application is also used in a contention access manner of single carrier LBT, and how to solve the problem of blocking between devices under different operators or between different devices under the same operator. The method comprises the following specific steps:

first, the problem of blocking between devices under different operators or different devices under the same operator is solved by adopting the enhanced LBT Cat2 mechanism. There are two cases of enhanced LBT Cat 2: the starting position of CCA detection is fixed, and the equipment under different operators or different equipment under the same operator selects from K time periods divided in advance in a configured time interval for channel contention access or takes a certain fixed time period as the starting point of respective CCA detection; or randomly selecting one time period from the K time periods as a starting point of CCA detection. And executing CCA detection according to a fixed CCA detection starting point or a randomly selected CCA detection starting point, and determining that the device acquires the use right of the channel as long as the channel detection is from busy to idle and the continuous detection channel idle time is not less than the CCA detection time length. Wherein: the CCA detection time period may be configured to be one of 34us, 25us, 20us, 18us, 16us, 9us, or 10 us. For devices under different operators, different CCA detection starting points may be configured, or a CCA detection starting point may be randomly selected. For devices under the same operator, different devices may configure different CCA detection starting points, or may randomly select a CCA detection starting point. The method aims to solve the problem that one party cannot compete for the channel all the time due to the problem of collision among devices.

In addition, for the case of a fixed CCA detection starting position, base stations or UEs in different operators may perform CCA detection according to predefined different CCA detection starting positions, or start performing CCA detection from different CCA detection starting positions through configuring, in the background, base stations in different operators. For different base stations under the same operator, different CCA detection starting positions may be configured for different base stations according to a predefined method, or an X2 interface interaction manner, or a background configuration manner. For different UEs under the same operator, different UEs may be configured with different CCA detection start positions according to a predefined method, or a base station indication manner, or a background configuration manner.

For the DRS transmission and LBT execution, in the last two OFDM symbol time intervals of each subframe in the 5 consecutive subframes, devices under different operators or different devices under the same operator may configure different fixed CCA detection starting points for the devices under different operators or different devices under the same operator according to K CCA detection time periods divided in advance in the two symbols, or the CCA detection starting points may be randomly selected. In order to realize that equipment under different operators or different equipment under the same operator has a relatively fair opportunity for sending DRS. Or, in a time interval of 5 consecutive subframes, the time interval is divided into L CCA detection segments, and different fixed CCA detection starting points may be configured in the L CCA detection time segments by devices under different operators or different devices under the same operator, or the CCA detection starting points may be randomly selected.

For example, in the time of two OFDM symbols (greater than 142us), assuming that the CCA detection duration is 20us, the time of two symbols is divided into 7 CCA detection periods of 20 us. For the base station 1 in the operator a and the base station 2 in the operator B, by fixedly configuring different CCA detection starting points, the CCA detection starting point configured for the base station 1 is the second CCA detection period, that is, the CCA detection is performed from 21us, and the CCA detection starting point configured for the base station is the fourth CCA detection period, that is, the CCA detection is started from 61 us. In principle, the base station 1 has a very high chance of acquiring the channel usage rights. When the channel contention access next time or after a period of time, the starting positions of the CCA detection performed by the base stations 1 and 2 may be changed, or the starting positions of the CCA detection by the base stations 1 and 2 may be interacted.

In addition, the base stations 1 and 2 may randomly select respective CCA detection time starts within the 7 CCA detection periods. This approach may have the effect that both base station 1 and base station 2 select the same time period to start performing CCA detection, resulting in a collision.

Example four

Through the above description of the embodiments, those skilled in the art can clearly understand that the method according to the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but the former is a better implementation mode in many cases. Based on such understanding, the technical solutions of the present invention may be embodied in the form of a software product, which is stored in a storage medium (e.g., ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a terminal device (e.g., a mobile phone, a computer, a server, or a network device) to execute the method according to the embodiments of the present invention.

In this embodiment, a contention access apparatus for a carrier is further provided, where the apparatus is used to implement the foregoing embodiments and preferred embodiments, and details of the foregoing description are omitted. As used below, the term "module" may be a combination of software and/or hardware that implements a predetermined function. Although the means described in the embodiments below are preferably implemented in software, an implementation in hardware, or a combination of software and hardware is also possible and contemplated.

Fig. 2 is a block diagram of a multi-carrier contention access apparatus according to an embodiment of the present invention, and as shown in fig. 2, the apparatus includes: an acquisition module 22 and an access module 24, wherein,

an obtaining module 22, configured to obtain a carrier set for performing a listen before talk LBT mechanism according to a first preset condition;

the access module 24 is configured to perform contention access of a channel in the carrier set according to a second preset condition according to a preset scheduling manner.

The multi-carrier contention access device provided by the embodiment of the application acquires a carrier set executing a Listen Before Talk (LBT) mechanism according to a first preset condition; and according to a preset scheduling mode, performing the competitive access of the channel in the carrier set according to a second preset condition. The problem that the operating state of the uplink data transmission performance at high load is poor due to lack of an LBT (local binary transmission) competitive access method of uplink multiple carriers in the related art is solved, and the effect of improving the operating state of the uplink data transmission performance at high load is achieved.

Further, the access module 24 includes: a first access unit, configured to perform contention access on a channel on each carrier according to a specified listen before talk LBT mechanism when a scheduling manner is a self-carrier scheduling manner; the specified listen before talk LBT mechanism includes one of: LBT Cat2 mechanism; enhanced LBT Cat2 mechanism; a configured LBT Cat4 mechanism for long time to perform LBT procedure but small random backoff value N; a fast listen before talk, LBT, mechanism; wherein the fast listen before talk LBT mechanism comprises one of: delay period + extended clean channel assessment defer period + ECCA procedure, or, directly extended clean channel assessment ECCA procedure.

Further, the access module 24 includes: a first performing unit, configured to, in a self-carrier scheduling manner, perform, on each carrier and according to an LBT Cat4 mechanism, a LBT Cat2 mechanism on a selected one or multiple carriers and not perform the LBT mechanism on other carriers in a carrier set in a case that a base station performs contention access for a channel on each carrier; a second performing unit, configured to perform a fast LBT mechanism on the selected one or more carriers, and not perform the LBT mechanism on other carriers in the carrier set; a third performing unit, configured to perform a fast LBT mechanism on the selected one or more carriers, and perform an LBT Cat2 mechanism on other carriers in the carrier set when the fast LBT procedure is to be completed on the one or more carriers.

Further, the access module 24 includes: a fourth execution unit, configured to, when the preset scheduling mode is a self-carrier scheduling mode, perform channel contention access on a primary carrier selected by the base station according to an LBT Cat4 mechanism and an LBT Cat2 mechanism on an auxiliary carrier, execute the LBT Cat2 mechanism on the primary carrier indicated by the base station, and execute a simplified LBT Cat4 or a fast LBT mechanism on the auxiliary carrier indicated by the base station side; or, a fifth performing unit, configured to perform the LBT Cat2 mechanism on each carrier in the carrier set; or, a sixth performing unit, configured to perform, on each carrier in the carrier set, an LBT Cat4 or a fast LBT mechanism configured for performing an LBT procedure with a long time but a relatively small random backoff value N; or, the seventh performing unit is configured to, on the carrier on which the base station performs the LBT Cat4, perform no LBT mechanism, and, on the carrier on which the base station performs the LBT Cat2, perform the configured LBT Cat4 with a long time for performing the LBT procedure but a relatively small random backoff value N or perform the fast LBT procedure; or, the eighth execution unit is configured to, on a carrier on which the base station successfully performs LBT, not execute the LBT mechanism or execute the LBT Cat2 mechanism if a Gap between the downlink transmission burst and the uplink transmission burst is smaller than a preset value.

Further, the access module 24 includes: a ninth executing unit, configured to execute a specified LBT Cat4 mechanism on each carrier in the carrier set when the preset scheduling mode is a cross-carrier scheduling mode; the specified LBT Cat4 mechanism refers to an LBT procedure with a random backoff, wherein the maximum contention window size is larger than the contention window for performing LBT Cat4 by self-carrier scheduling, and smaller than the contention window for performing LBT Cat4 by downlink; or, a tenth performing unit, configured to perform a fast LBT mechanism on each carrier in the carrier set; wherein: the fast LBT mechanism includes: defer period + ECCA or direct ECCA process; or, the eleventh performing unit is configured to, when it is about to succeed to perform the specified LBT Cat4 mechanism on one or more carriers selected from the carrier set, perform the LBT Cat2 mechanism on the remaining carriers; or, a twelfth performing unit, configured to perform a specific LBT Cat4 mechanism on one or more selected carriers in the carrier set, and perform a fast LBT mechanism on the remaining carriers; or, a thirteenth performing unit, configured to perform a fast LBT mechanism on one or more selected carriers in the carrier set, and perform an LBT Cat2 mechanism on the remaining carriers.

EXAMPLE five

Fig. 3 is a block diagram of a multi-carrier contention access system according to an embodiment of the present invention, and as shown in fig. 3, the multi-carrier contention access system includes: a base station and a terminal, the base station being communicatively coupled to the terminal, wherein,

the terminal is another multi-carrier contention access device shown in fig. 2.

It should be noted that, the above modules may be implemented by software or hardware, and for the latter, the following may be implemented, but not limited to: the modules are all positioned in the same processor; alternatively, the modules are respectively located in a plurality of processors.

The embodiment of the invention also provides a storage medium. Alternatively, in the present embodiment, the storage medium may be configured to store program codes for performing the following steps:

s1, acquiring a carrier set for executing a Listen Before Talk (LBT) mechanism according to a first preset condition;

s2, performing contention access of the channel in the carrier set according to a second predetermined condition according to a predetermined scheduling manner.

Optionally, the storage medium is further arranged to store program code for performing the steps of:

s1, when the scheduling mode is a self-carrier scheduling mode, performing contention access of a channel on each carrier in the carrier set according to the same listen before talk LBT mechanism includes: user Equipment (UE) performs channel contention access on each carrier according to a specified Listen Before Talk (LBT) mechanism; the specified listen before talk LBT mechanism includes one of: LBT Cat2 mechanism; enhanced LBT Cat2 mechanism; a configured LBT Cat4 mechanism for long time to perform LBT procedure but small random backoff value N; a fast listen before talk, LBT, mechanism; wherein the fast listen before talk LBT mechanism comprises one of: delay period + extended clean channel assessment defer period + ECCA procedure, or, directly extended clean channel assessment ECCA procedure.

Optionally, in this embodiment, the storage medium may include, but is not limited to: a U-disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a removable hard disk, a magnetic or optical disk, and other various media capable of storing program codes.

Optionally, in this embodiment, the processor, according to a program code stored in the storage medium, when performing contention access to a channel according to an LBT Cat2 mechanism on each carrier in a carrier set when a specified listen-before-talk mechanism is the LBT Cat2 mechanism, acquiring the right to use the channel includes: performing channel contention access on each carrier according to an LBT Cat2 mechanism, and judging to acquire the use right of the carrier successfully completing the LBT Cat2 mechanism for the carrier successfully completing the LBT Cat2 mechanism; or, if the total number of carriers successfully executing the LBT Cat2 mechanism does not satisfy the specific number of carriers when the LBT Cat2 mechanism is successfully executed on S carriers among the K carriers and the LBT Cat2 mechanism is failed to be executed on the remaining carriers, processing the carriers according to a preset mode; wherein, the preset mode includes: randomly selecting carriers to satisfy a specific number of carriers among carriers failing to perform the LBT Cat2 mechanism; or, directly evaluating that the transmission equipment acquires the use right of the carrier on the carrier which fails to execute the LBT Cat2 mechanism; if the total number of carriers successfully performing the LBT Cat2 mechanism satisfies a specific number of carriers, the transmission device uses or considers to acquire the use right of the carrier successfully completing the LBT Cat2 mechanism.

Optionally, in this embodiment, the processor executing the LBT Cat2 mechanism according to the program code stored in the storage medium includes: if the channel is detected to be idle from busy, and the continuous idle time of the channel is detected to be greater than or equal to the preset idle channel assessment CCA detection time length, or the continuous idle time of the channel is detected to be greater than or equal to the preset idle channel assessment CCA detection time length, it is determined that the transmission device acquires the use right of the unauthorized carrier, or the LBT Cat2 process is completed.

Optionally, in this embodiment, the performing, by the processor according to a program code stored in a storage medium, in a case that a specified listen before talk mechanism is an enhanced LBT Cat2 mechanism, and a detection start position of a clear channel assessment CCA detection duration includes a fixed CCA detection start position or a randomly selected CCA detection start position, performing contention access on a channel according to the specified listen before talk LBT mechanism on each carrier includes: performing channel contention access on each carrier according to a common fixed CCA detection starting position; or, performing channel contention access on each carrier according to an independent fixed CCA detection starting position; or, performing channel contention access on each carrier according to a common randomly selected CCA detection starting position; or, performing channel contention access according to an independent randomly selected CCA detection starting position on each carrier.

Optionally, in this embodiment, the processor performs, according to a program code stored in the storage medium, that when a detection start position of the CCA is a fixed CCA detection start position, a contention access time zone is divided into K CCA detection time periods in advance; in K CCA detection time periods, each transmission device fixedly starts to perform CCA detection from a fixed starting point of K different time periods, and different transmission devices have different fixed CCA detection starting points in K different time periods; if the detection channel is from busy to idle, and the continuous detection channel idle time is greater than or equal to the CCA detection time, or the continuous detection channel idle time is greater than or equal to the preset idle channel assessment CCA detection time, it is determined that the transmission device acquires the right to use the unlicensed carrier, or the LBT Cat2 procedure is completed.

Optionally, in this embodiment, the processor performs, according to a program code stored in the storage medium, that when a detection start position of the CCA is a random CCA detection start position, a contention access time zone is divided into K CCA detection time periods in advance; the transmission equipment randomly selects the starting point of each CCA detection time period as the starting point of CCA detection in the K CCA detection time periods; if the detection channel is from busy to idle, and the continuous detection channel idle time is greater than or equal to the CCA detection time, or the continuous detection channel idle time is greater than or equal to the preset idle channel assessment CCA detection time, it is determined that the transmission device acquires the use right of the unlicensed carrier, or the enhanced LBT Cat2 process is completed.

Optionally, in this embodiment, the performing, by the processor according to the program code stored in the storage medium, in a case that the specified listen-before-talk LBT mechanism is a fast listen-before-talk LBT mechanism, performing contention access on a channel according to the specified listen-before-talk LBT mechanism on each carrier includes: under the condition that the competitive access of a channel is finished on each carrier according to a rapid Listen Before Talk (LBT) mechanism, judging to acquire the use right of the carrier successfully finishing the LBT process; performing channel contention access on each carrier according to a rapid listen-before-talk (LBT) mechanism, successfully completing the carrier of the rapid listen-before-talk (LBT) mechanism, and judging by transmission equipment to acquire the carrier use right for successfully completing the rapid listen-before-talk (LBT) process; on a carrier of an uncompleted fast Listen Before Talk (LBT) mechanism, a transmission device considers that the carrier is unavailable, or for the carrier of the uncompleted fast Listen Before Talk (LBT) mechanism, if a random backoff value N meets a specific threshold value, the transmission device judges that a carrier use right of the fast Listen Before Talk (LBT) process is successfully completed; if the random back-off value N does not meet a specific threshold value, judging that the use right of the carrier is not obtained or the carrier is abandoned; or, performing contention access of a channel on each carrier according to a fast Listen Before Talk (LBT) mechanism, and if the CCA detects that the channel is idle for the last time or a plurality of continuous last times, determining by the transmission equipment to acquire the carrier use right for successfully completing the fast Listen Before Talk (LBT) process; if a carrier which is about to finish the rapid Listen Before Talk (LBT) mechanism exists, the current LBT process is stopped on other carriers, the channel contention access is executed immediately according to the LBT Cat2 mechanism, and the transmission equipment judges that the carrier use right is obtained when the carrier of the corresponding LBT process is finished before the transmission starting moment.

Optionally, in this embodiment, the executing, by the processor according to the program code stored in the storage medium, in the self-carrier scheduling manner, in a case that the base station performs contention access of the channel according to the LBT Cat4 mechanism on each carrier, the performing contention access of the channel according to a different listen-before-talk LBT mechanism on each carrier in the carrier set includes: performing the LBT Cat2 mechanism on the selected one or more carriers and not performing the LBT mechanism on other carriers in the set of carriers; performing a fast LBT mechanism on the selected one or more carriers, and not performing LBT mechanisms on other carriers in the set of carriers; the fast LBT mechanism is performed on the selected one or more carriers, and the LBT Cat2 mechanism is performed on the other carriers in the set of carriers when the fast LBT procedure is about to be completed on the one or more carriers.

Optionally, in this embodiment, when the processor executes, according to the program code stored in the storage medium, the fast LBT mechanism to be completed on the selected one or more carriers, the executing the LBT Cat2 mechanism on the other carriers in the carrier set includes: when the random backoff value N in the fast LBT process performed on one carrier decreases to a specific threshold, the other carriers in the carrier set start to perform the LBT Cat2 mechanism; or, when the random backoff values N in the fast LBT procedures performed on the multiple carriers respectively decrease to a specific threshold, the other carriers in the carrier set start to perform the LBT Cat2 mechanism; wherein, the N value is decreased to the carrier wave with a specific threshold value first to execute self-delay operation; or, when the fast LBT process is performed on multiple carriers and channel idle is detected at the same time, the random backoff N on each carrier is decremented, and when the value N is decremented to a specific threshold, the other carriers in the carrier set start to perform the LBT Cat2 mechanism.

Optionally, in this embodiment, the executing, by the processor according to the program code stored in the storage medium, under the condition that the preset scheduling mode is a self-carrier scheduling mode, the performing, in the carrier set, the contention access of the channel according to the second preset condition when the contention access of the channel is performed according to the LBT Cat4 mechanism on the primary carrier and according to the LBT Cat2 mechanism on the secondary carrier selected by the base station includes: performing an LBT Cat2 mechanism on a primary carrier indicated by a base station, and performing a simplified LBT Cat4 or a fast LBT mechanism on a secondary carrier indicated by the base station; or, the LBT Cat2 mechanism is performed on each carrier in the set of carriers; or, performing a configured LBT mechanism on each carrier in the set of carriers, which is long in time to perform the LBT procedure but with a relatively small random backoff value N, LBT Cat4 or fast LBT; or, on the carrier where the base station performs LBT Cat4, the LBT mechanism is not performed, and on the carrier where the base station performs LBT Cat2, the configured LBT Cat4, which has a long time for performing the LBT procedure but a relatively small random backoff value N, or the fast LBT procedure is performed; or, on a carrier on which the base station successfully performs LBT, if a Gap between a downlink transmission burst and an uplink transmission burst is smaller than a preset value, the LBT mechanism is not performed, or the LBT Cat2 mechanism is performed.

Optionally, in this embodiment, the executing, by the processor according to the program code stored in the storage medium, the contention access of the channel in the carrier set according to the second preset condition when the preset scheduling mode is the cross-carrier scheduling mode includes: performing a specified LBT Cat4 mechanism on each carrier in the set of carriers; the specified LBT Cat4 mechanism refers to an LBT procedure with a random backoff, wherein the maximum contention window size is larger than the contention window for performing LBT Cat4 by self-carrier scheduling, and smaller than the contention window for performing LBT Cat4 by downlink; or, 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 process; or, when the specified LBT Cat4 mechanism is to be successfully executed on one or more selected carriers in the carrier set, the LBT Cat2 mechanism is executed on the rest carriers; or, a specific LBT Cat4 mechanism is performed on one or more selected carriers in the carrier set, and a fast LBT mechanism is performed on the remaining carriers; alternatively, the fast LBT mechanism is performed on a selected one or more carriers in the set of carriers, and the LBT Cat2 mechanism is performed on the remaining carriers.

Optionally, in this embodiment, in a case that the processor executes, according to the program code stored in the storage medium, to perform a specified LBT Cat4 mechanism or a fast LBT mechanism on each carrier in the carrier set, the determining to acquire the channel usage right includes: under the condition that the appointed LBT Cat4 mechanism or the rapid LBT mechanism is completed on each carrier in the carrier set, judging to acquire the use right of the carrier successfully completing the appointed LBT Cat4 mechanism or the rapid LBT mechanism; or, in the carrier set, a carrier that is about to complete the specified LBT Cat4 mechanism or the fast LBT mechanism, if the current random backoff value N satisfies the preset threshold, the LBT process on other carriers that are executing the specified LBT Cat4 mechanism or the fast LBT mechanism is stopped, and the LBT Cat2 mechanism is immediately executed; under the condition that the carrier corresponding to the LBT process is completed on each carrier, the transmission equipment judges to acquire the use right of the carrier successfully completing the LBT process; or, under the condition that a specified LBT Cat4 mechanism or a rapid LBT mechanism is completed on a part of carriers in the carrier set and a current random backoff value N on a carrier not completing the specified LBT Cat4 process or the rapid LBT mechanism meets a preset threshold value, determining to acquire the use right of a carrier successfully completing the LBT process; or, if the CCA detection channel on the carrier of the specified LBT Cat4 procedure or the fast LBT mechanism is not completed for the last time or several times consecutively before the transmission start time is clear, the transmission apparatus determines the usage right of the acquired carrier.

Optionally, in this embodiment, when the processor executes, according to the program code stored in the storage medium, that it is about to succeed to execute the specified LBT Cat4 mechanism on one or more carriers selected from the carrier set, in case of executing the LBT Cat2 mechanism on the remaining carriers, determining to acquire the channel usage right includes: when the designated LBT Cat4 mechanism is executed on one carrier selected from the carrier set to be successful, an LBT Cat2 mechanism is executed on the rest carriers, and when each carrier finishes the respective corresponding LBT process, the use right of the carrier which successfully finishes the LBT process is judged to be obtained; or, when the specified LBT Cat4 mechanism is executed on each of the multiple carriers selected in the carrier set, that is, the LBT Cat2 mechanism is executed on the remaining carriers, and when each carrier completes its corresponding LBT procedure, it is determined that the use right of the carrier that successfully completes the LBT procedure is obtained; or, a specified LBT Cat4 mechanism is executed on a plurality of carriers selected in the carrier set, if at least one carrier is to complete the specified LBT Cat4 mechanism, an LBT Cat2 mechanism is executed on the remaining carriers, and when each carrier completes its corresponding LBT procedure, it is determined to acquire the use right of the carrier that successfully completes the LBT procedure.

Optionally, in this embodiment, the processor executes, according to program codes stored in the storage medium, a specific LBT Cat4 mechanism on one or more carriers selected from the carrier set, and in a case that a fast LBT mechanism is executed on the remaining carriers, determining to acquire the channel usage right includes: executing a specified LBT Cat4 mechanism on a selected carrier in the carrier set, and under the condition of executing a rapid LBT mechanism on the rest carriers, if the corresponding LBT process is completed on each carrier before the transmission starts, judging to acquire the use right of the carrier successfully completing the LBT process; or, under the condition that a designated LBT Cat4 mechanism is executed on a selected carrier in the carrier set and a fast LBT mechanism is executed on the remaining carriers, if a corresponding LBT process is not completed on a part of carriers before the transmission starts on each carrier, if a current random backoff value N on the carrier on which the LBT process is not completed meets a preset threshold value, determining to acquire a use right of the carrier which successfully completes the LBT process; or, under the condition that a designated LBT Cat4 mechanism is executed on a selected carrier in the carrier set and a fast LBT mechanism is executed on the remaining carriers, if a corresponding LBT process is not completed on a part of carriers before the transmission starts on each carrier, if the last or last consecutive times of CCA on the carrier on which the LBT process is not completed detects that the channel is idle, it determines to acquire the use right of the carrier which successfully completes the LBT process; or, executing a specified LBT Cat4 mechanism on a plurality of carriers selected in the carrier set, and under the condition that a fast LBT mechanism is executed on the remaining carriers, if a random backoff value N of a corresponding LBT procedure on one carrier satisfies a specific threshold, stopping respective LBT procedures on the remaining carriers, and immediately executing an LBT Cat2 mechanism; if each carrier finishes the corresponding LBT process before the transmission starts, judging to acquire the use right of the carrier which successfully finishes the LBT process; or, under the condition that a designated LBT Cat4 mechanism is executed on a plurality of carriers selected in the carrier set and a fast LBT mechanism is executed on the remaining carriers, if a carrier completes a corresponding LBT procedure before transmission starts, a reservation signal may be sent or a self-delaying operation may be executed; if the carrier which does not complete the corresponding LBT process still does not complete the LBT process at the transmission starting moment, judging that a current random back-off value N on the carrier meets a specific threshold value or a CCA detection channel is idle for the last time or a plurality of times of last continuous times, and judging that the use right of the carrier which successfully completes the LBT process is obtained; or, executing a specified LBT Cat4 mechanism on a plurality of carriers selected in the carrier set, and under the condition of executing a fast LBT mechanism on the remaining carriers, if each carrier performs channel contention access according to its respective LBT mechanism, if the carrier completes the corresponding LBT procedure before the transmission start time, the transmission device determines to acquire the use right of the carrier that successfully completes the LBT procedure; or, under the condition that a plurality of carriers selected in the carrier set execute a specified LBT Cat4 mechanism, and execute a fast LBT mechanism on the remaining carriers, if each carrier performs channel contention access according to its respective LBT mechanism, if the LBT process is not completed on the carrier before the transmission start time, if the current random backoff value N on each carrier satisfies the carrier of the preset threshold value, or the CCA detects that the channel is idle for the last time or for the last consecutive times, the transmission device determines to acquire the usage right of the carrier that successfully completes the LBT process; or, executing a specified LBT Cat4 mechanism on a plurality of carriers selected in the carrier set, and under the condition that a fast LBT mechanism is executed on the remaining carriers, if a random backoff value N on a carrier satisfies a first threshold, adjusting the random backoff values N on other carriers to the first threshold; if the random backoff value N on the carrier after the adjustment of the random backoff value N meets the second threshold value, adjusting the random backoff values N on the other carriers 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 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 meets the carrier with the preset threshold value, or if the CCA detection channel is idle for the last time or last continuous times, the transmission device determines to acquire the usage right of the carrier successfully completing the LBT process.

Optionally, in this embodiment, the processor executes, according to a program code stored in the storage medium, a processing procedure according to a preset manner under the condition that a carrier that contends for access to the channel according to the listen-before-talk LBT mechanism fails, or a data packet to be transmitted on the carrier; wherein, the preset mode includes one of: dropping carriers that failed to perform LBT or dropping transmissions on carriers; retransmitting a data packet on a carrier on which LBT fails; transmitting the data packet on the alternative resource on the carrier wave which is successfully competed; using a backup unlicensed carrier; multiplexing the same resources on other carriers to transmit respective data packets together; wherein, different data are sent on the same resource, if the rank indication RI is greater than 2, the resource can be multiplexed for transmission, or different data blocks are sent on the same resource through the random access radio network temporary identifier RNTI or the cyclic shift CS code.

Optionally, the specific examples in this embodiment may refer to the examples described in the above embodiments and optional implementation manners, and this embodiment is not described herein again.

It will be apparent to those skilled in the art that the modules or steps of the present invention described above may be implemented by a general purpose computing device, they may be centralized on a single computing device or distributed across a network of multiple computing devices, and alternatively, they may be implemented by program code executable by a computing device, such that they may be stored in a storage device and executed by a computing device, and in some cases, the steps shown or described may be performed in an order different than that described herein, or they may be separately fabricated into individual integrated circuit modules, or multiple ones of them may be fabricated into a single integrated circuit module. Thus, the present invention is not limited to any specific combination of hardware and software.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A multi-carrier contention access method, comprising:

acquiring a carrier set for executing a Listen Before Talk (LBT) mechanism according to a first preset condition;

according to a preset scheduling mode, performing channel contention access in the carrier set according to a second preset condition; wherein, the preset scheduling mode comprises: a self-carrier scheduling mode or a cross-carrier scheduling mode; wherein, the contention access of the channel is executed according to the same Listen Before Talk (LBT) mechanism on each carrier in the carrier set; or, performing contention access of a channel according to a different Listen Before Talk (LBT) mechanism on each carrier in the carrier set; when the scheduling mode is the self-carrier scheduling mode, performing contention access of a channel on each carrier in the carrier set according to the same Listen Before Talk (LBT) mechanism includes:

the specified listen before talk, LBT, mechanism comprises one of: LBT Cat2 mechanism; enhanced LBT Cat2 mechanism; a configured LBT Cat4 mechanism for long time to perform LBT procedure but small random backoff value N; a fast listen before talk, LBT, mechanism;

wherein the fast listen before talk, LBT, mechanism comprises one of: delay period + extended clean channel assessment defer period + ECCA procedure, or, directly extended clean channel assessment ECCA procedure.

2. The method according to claim 1, wherein the first preset condition comprises:

a base station indication; or, combining the base station indication with the user equipment UE selection; or, the user equipment UE autonomously selects; alternatively, it is predefined.

3. The method of claim 1, wherein when a Gap duration Gap between a downlink transmission burst and an uplink transmission burst is less than or equal to a preset threshold, the UE selects whether to perform an uplink LBT mechanism or perform an LBT Cat2 mechanism.

4. The method of claim 1, wherein in case that the specified listen before talk mechanism is the LBT Cat2 mechanism, acquiring the right to use the channel when performing contention access for the channel according to the LBT Cat2 mechanism on each carrier in the carrier set comprises:

performing channel contention access on each carrier according to the LBT Cat2 mechanism, and judging to acquire the use right of the carrier successfully completing the LBT Cat2 mechanism for the carrier successfully completing the LBT Cat2 mechanism; alternatively, the first and second electrodes may be,

the LBT Cat2 mechanism is successfully executed on S carriers in K carriers, and when the LBT Cat2 mechanism is failed to be executed on the rest carriers, if the total number of the carriers successfully executing the LBT Cat2 mechanism does not meet the specific number of the carriers, the processing is carried out according to a preset mode; wherein, the preset mode comprises: randomly selecting carriers to satisfy a specific number of carriers among carriers failing to perform the LBT Cat2 mechanism; or, directly evaluating that the transmission device acquires the use right of the carrier on the carrier which fails to execute the LBT Cat2 mechanism; if the total number of carriers successfully performing the LBT Cat2 mechanism satisfies a specific number of carriers, the transmission device uses or considers to acquire the use right of successfully completing the LBT Cat2 mechanism carrier.

5. The method of claim 4, wherein the successfully performing the LBT Cat2 mechanism comprises: if the channel is detected to be idle from busy, and the continuous idle time of the detection channel is greater than or equal to the preset idle channel assessment CCA detection time length, or the continuous idle time of the detection channel is greater than or equal to the preset idle channel assessment CCA detection time length, it is determined that the transmission device acquires the use right of the unauthorized carrier, or the LBT Cat2 process is completed.

6. The method of claim 1, wherein performing contention access for the channel on each carrier according to the specified Listen Before Talk (LBT) mechanism when the specified listen before talk mechanism is the enhanced LBT Cat2 mechanism and the detection starting position of the Clear Channel Assessment (CCA) detection duration comprises a fixed CCA detection starting position or a randomly selected CCA detection starting position comprises:

performing channel contention access on each carrier according to the common fixed CCA detection starting position; or the like, or, alternatively,

performing channel contention access on each carrier according to the independent fixed CCA detection starting position; or the like, or, alternatively,

performing channel contention access on each carrier according to the common randomly selected CCA detection starting position; or the like, or, alternatively,

and performing channel contention access on each carrier according to the independent randomly selected CCA detection starting position.

7. The method according to claim 6, wherein when the CCA detection start position is the fixed CCA detection start position, a contention access time zone is divided into K CCA detection time periods in advance; in the K CCA detection time periods, each transmission device starts CCA detection from a fixed starting point of K different time periods, and different transmission devices have different fixed CCA detection starting points in the K different time periods; and if the detection channel is from busy to idle and the continuous detection channel idle time is greater than or equal to the CCA detection time length, or the continuous detection channel idle time is greater than or equal to a preset idle channel assessment CCA detection time length, determining that the transmission equipment acquires the use right of the unauthorized carrier, or finishing the LBT Cat2 process.

8. The method according to claim 6, wherein when the CCA detection start position is the randomly selected CCA detection start position, a contention access time zone is pre-divided into K CCA detection time periods; the transmission equipment randomly selects the starting point of each CCA detection time period as the starting point of the CCA detection in the K CCA detection time periods; and if the detection channel is from busy to idle and the continuous detection channel idle time is greater than or equal to the CCA detection time length, or the continuous detection channel idle time is greater than or equal to a preset idle channel assessment CCA detection time length, determining that the transmission equipment acquires the use right of the unauthorized carrier, or finishing the enhanced LBT Cat2 process.

9. The method of claim 1, wherein in case the specified Listen Before Talk (LBT) mechanism is the fast Listen Before Talk (LBT) mechanism, performing contention access for a channel on each carrier according to the specified Listen Before Talk (LBT) mechanism comprises:

under the condition that each carrier finishes the competitive access of the channel according to the rapid Listen Before Talk (LBT) mechanism, judging to acquire the carrier use right for successfully finishing the LBT process;

performing channel contention access on each carrier according to the fast listen-before-talk LBT mechanism, successfully completing the carrier of the fast listen-before-talk LBT mechanism, and judging by the transmission equipment to acquire the carrier use right for successfully completing the fast listen-before-talk LBT process; on the carrier not completing the fast listen before talk LBT mechanism, the transmission device considers that the carrier is unavailable, or for the carrier not completing the fast listen before talk LBT mechanism, if a random backoff value N meets a specific threshold value, the transmission device determines to acquire the carrier use right successfully completing the fast listen before talk LBT process; if the random back-off value N does not meet a specific threshold value, judging that the use right of the carrier is not obtained or abandoning the carrier; alternatively, the first and second electrodes may be,

performing channel contention access on each carrier according to the rapid listen-before-talk (LBT) mechanism, and if the CCA detects that the channel is idle for the last time or a plurality of continuous last times, determining by the transmission equipment to acquire the carrier use right for successfully completing the rapid listen-before-talk (LBT) process;

if a carrier which is about to finish the quick Listen Before Talk (LBT) mechanism exists, stopping the current LBT process on other carriers, immediately executing the competitive access of the channel according to the LBT Cat2 mechanism, and finishing the corresponding carrier of the LBT process before the moment of starting transmission, and then the transmission equipment judges to acquire the use right of the carrier.

10. The method of claim 1, wherein in the self-carrier scheduling mode, in case that 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 a different listen-before-talk LBT mechanism on each carrier in the carrier set comprises:

performing an LBT Cat2 mechanism on the selected one or more carriers, and not performing an LBT mechanism on other carriers in the set of carriers;

the fast LBT mechanism is performed on the selected one or more carriers, and the LBT Cat2 mechanism is performed on other carriers in the set of carriers when the fast LBT procedure is to be completed on the one or more carriers.

11. The method of claim 10, wherein performing LBT Cat2 mechanisms on other carriers in the set of carriers when the fast LBT mechanism is to be completed on the selected one or more carriers comprises:

when the random backoff values N in the fast LBT procedure performed on the one carrier are all decreased to a specific threshold value, the other carriers in the carrier set start to perform the LBT Cat2 mechanism; or the like, or, alternatively,

when the random backoff values N in the fast LBT procedures performed on the multiple carriers respectively decrease to a specific threshold value, other carriers in the carrier set start to perform the LBT Cat2 mechanism; wherein, the N value is decreased to the carrier wave with a specific threshold value first to execute self-delay operation; or the like, or, alternatively,

when the fast LBT process is performed on the multiple carriers and channel idle is detected at the same time, the random backoff value N on each carrier is decremented, and when the value N is decremented to a specific threshold, the other carriers in the carrier set start to perform the LBT Cat2 mechanism.

12. The method of claim 1, wherein when the preset scheduling mode is the self-carrier scheduling mode, and when contention access for a channel is performed according to an LBT Cat4 mechanism on a primary carrier and according to an LBT Cat2 mechanism on a secondary carrier selected by a base station, performing contention access for the channel according to a second preset condition in the carrier set comprises:

performing an LBT Cat2 mechanism on a primary carrier indicated by the base station, and performing a simplified LBT Cat4 or a fast LBT mechanism on a secondary carrier indicated by the base station side; or the like, or, alternatively,

performing an LBT Cat2 mechanism on each carrier in the set of carriers; or the like, or, alternatively,

performing a configured long-time but relatively small random backoff value N LBT Cat4 or fast LBT mechanism on each carrier in the set of carriers to perform an LBT procedure; or the like, or, alternatively,

performing, on a carrier on which the base station performs LBT Cat4, an LBT mechanism, and performing, on a carrier on which the base station performs LBT Cat2, LBT Cat4 configured for performing an LBT procedure for a long time but with a relatively small random backoff value N or performing a fast LBT procedure; or the like, or, alternatively,

on the carrier wave on which the base station successfully executes the LBT, if the Gap between the downlink transmission burst and the uplink transmission burst is smaller than a preset value, the LBT mechanism is not executed, or the LBT Cat2 mechanism is executed.

13. The method of claim 1, wherein performing contention access for a channel in the carrier set according to a second preset condition when the preset scheduling mode is a cross-carrier scheduling mode comprises:

performing a specified LBT Cat4 mechanism on each carrier in the set of carriers; the specified LBT Cat4 mechanism is an LBT process with random backoff, wherein the maximum contention window size is larger than the contention window of the self-carrier scheduling execution LBT Cat4 and smaller than the contention window of the downlink execution LBT Cat4 mechanism; alternatively, the first and second electrodes may be,

performing an LBT Cat2 mechanism on remaining carriers in the imminent success in performing the specified LBT Cat4 mechanism on the selected one or more carriers in the set of carriers; alternatively, the first and second electrodes may be,

performing a specific LBT Cat4 mechanism on one or more selected carriers of the set of carriers, and performing a fast LBT mechanism on the remaining carriers; alternatively, the first and second electrodes may be,

performing a fast LBT mechanism on a selected one or more of the set of carriers, and performing an LBT Cat2 mechanism on the remaining carriers.

14. The method of claim 13, wherein determining to obtain channel usage rights in case the specified LBT Cat4 mechanism or the fast LBT mechanism is performed on each carrier in the set of carriers comprises:

determining to acquire usage rights of carriers successfully completing the specified LBT Cat4 mechanism or the fast LBT mechanism under the condition that the specified LBT Cat4 mechanism or the fast LBT mechanism is completed on each carrier in the carrier set; or the like, or, alternatively,

in the carrier set, a carrier that is about to complete the specified LBT Cat4 mechanism or the fast LBT mechanism, if a current random backoff value N satisfies a preset threshold, stopping LBT procedures on other carriers that are executing the specified LBT Cat4 mechanism or the fast LBT mechanism, and immediately executing an LBT Cat2 mechanism; under the condition that the carrier corresponding to the LBT process is completed on each carrier, the transmission equipment judges to acquire the use right of the carrier successfully completing the LBT process; or the like, or, alternatively,

determining to acquire the usage right of the carrier successfully completing the LBT procedure when the designated LBT Cat4 mechanism or the fast LBT mechanism is completed on a part of carriers in the carrier set and a current random backoff value N on the carrier not completing the designated LBT Cat4 procedure or the fast LBT mechanism satisfies a preset threshold; or the like, or, alternatively,

if the CCA detection channel on the carrier of the designated LBT Cat4 procedure or the fast LBT mechanism is not completed for the last time or several consecutive times before the transmission time is started, the transmission device determines the usage right of the acquired carrier.

15. The method of claim 13, wherein determining to obtain channel usage rights in the case of performing a LBT Cat2 mechanism on remaining carriers at the time of imminent success of performing a specified LBT Cat4 mechanism on a selected one or more carriers of the set of carriers comprises:

when the designated LBT Cat4 mechanism is to be successfully executed on a selected carrier in the carrier set, the LBT Cat2 mechanism is executed on the rest carriers, and when each carrier finishes the respective corresponding LBT process, the use right of the carrier which successfully finishes the LBT process is judged to be acquired; alternatively, the first and second electrodes may be,

when the designated LBT Cat4 mechanism is executed on a plurality of carriers selected in the carrier set and is about to succeed simultaneously, the LBT Cat2 mechanism is executed on the rest carriers, and when each carrier finishes the respective corresponding LBT process, the use right of the carrier which successfully finishes the LBT process is obtained is judged; alternatively, the first and second electrodes may be,

and executing the specified LBT Cat4 mechanism on a plurality of carriers selected in the carrier set, if at least one carrier is about to complete the specified LBT Cat4 mechanism, executing the LBT Cat2 mechanism on the rest carriers, and when each carrier completes the respective corresponding LBT process, judging to acquire the use right of the carrier which successfully completes the LBT process.

16. The method of claim 13, wherein determining to obtain channel usage rights in case of performing a specific LBT Cat4 mechanism on one or more selected carriers of the carrier set and performing a fast LBT mechanism on remaining carriers comprises:

executing the specified LBT Cat4 mechanism on a selected carrier in the carrier set, and under the condition of executing the rapid LBT mechanism on the rest carriers, if the corresponding LBT process is completed on each carrier before the transmission starts, judging to acquire the use right of the carrier successfully completing the LBT process; alternatively, the first and second electrodes may be,

executing the specified LBT Cat4 mechanism on a selected carrier in the carrier set, and under the condition that the rapid LBT mechanism is executed on the rest carriers, if the corresponding LBT process is not completed on part of carriers before the transmission starts on each carrier, if the current random backoff value N on the carrier without the LBT process meets the preset threshold value, determining to acquire the use right of the carrier successfully completing the LBT process; alternatively, the first and second electrodes may be,

executing the specified LBT Cat4 mechanism on a selected carrier in the carrier set, and under the condition that the rapid LBT mechanism is executed on the rest carriers, if the corresponding LBT process is not completed on part of carriers before the transmission starts on each carrier, if CCA on the carrier without the LBT process is detected to be idle for the last time or a plurality of continuous last times, determining to acquire the use right of the carrier successfully completing the LBT process; alternatively, the first and second electrodes may be,

executing the specified LBT Cat4 mechanism on a plurality of carriers selected in the carrier set, and under the condition that the fast LBT mechanism is executed on the remaining carriers, if a random backoff value N of a corresponding LBT procedure on one carrier meets a specific threshold value, stopping respective LBT procedures on the remaining carriers, and immediately executing an LBT Cat2 mechanism; if each carrier finishes the corresponding LBT process before the transmission starts, judging to acquire the use right of the carrier which successfully finishes the LBT process; alternatively, the first and second electrodes may be,

executing the specified LBT Cat4 mechanism on a plurality of carriers selected in the carrier set, and under the condition that the fast LBT mechanism is executed on the remaining carriers, if a carrier completes the corresponding LBT procedure before the transmission starts, then a reservation signal may be sent, or a self-delaying operation may be executed; the carrier which does not complete the corresponding LBT process continues to execute CCA detection, if the carrier which does not complete the LBT process at the transmission starting moment still judges that the current random backoff value N on the carrier meets a specific threshold value or a CCA detection channel is idle for the last time or a plurality of times, the use right of the carrier which successfully completes the LBT process is obtained; alternatively, the first and second electrodes may be,

executing the specified LBT Cat4 mechanism on a plurality of carriers selected in the carrier set, and under the condition of executing the rapid LBT mechanism on the rest carriers, if each carrier carries out channel competition access according to the respective LBT mechanism, if the carrier finishes the corresponding LBT process before the transmission starting time, the transmission equipment judges to acquire the use right of the carrier which successfully finishes the LBT process; alternatively, the first and second electrodes may be,

executing the specified LBT Cat4 mechanism on a plurality of carriers selected in the carrier set, under the condition of executing the rapid LBT mechanism on the rest carriers, if each carrier carries out channel competition access according to the respective LBT mechanism, if the LBT process is not completed on the carrier before the transmission starting time, if the current random back-off value N on each carrier meets the carrier of a preset threshold value, or the CCA detection channel is idle for the last time or a plurality of continuous times, the transmission equipment judges that the use right of the carrier which successfully completes the LBT process is obtained; alternatively, the first and second electrodes may be,

executing the specified LBT Cat4 mechanism on a plurality of carriers selected in the carrier set, and under the condition that the fast LBT mechanism is executed on the remaining carriers, if a random backoff value N on a carrier meets a first threshold, adjusting the random backoff values N on other carriers to the first threshold; if the random backoff value N on the carrier after the adjustment of the random backoff value N meets the second threshold value, adjusting the random backoff values N on the other carriers 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 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 meets the carrier with the preset threshold value, or if the CCA detection channel is idle for the last time or last continuous times, the transmission device determines to acquire the usage right of the carrier successfully completing the LBT process.

17. The method of claim 1, further comprising:

executing a processing flow according to a preset mode under the condition that the Listen Before Talk (LBT) mechanism competes for the carrier failed to access the channel or the data packet to be transmitted on the carrier; wherein, the preset mode comprises one of:

dropping a carrier on which LBT failed to be performed or dropping transmission on the carrier;

retransmitting a data packet on a carrier on which the LBT failed to be performed;

using a backup unlicensed carrier;

multiplexing the same resources on other carriers to transmit respective data packets together; wherein, different data are sent on the same resource, if the rank indication RI is greater than 2, the resource can be multiplexed for transmission, or different data blocks are sent on the same resource through the random access radio network temporary identifier RNTI or the cyclic shift CS code.

18. A multi-carrier contention access apparatus, comprising:

an obtaining module, configured to obtain a carrier set for performing a listen before talk LBT mechanism according to a first preset condition;

an access module, configured to perform contention access of a channel in the carrier set according to a second preset condition according to a preset scheduling manner; wherein, the preset scheduling mode comprises: a self-carrier scheduling mode or a cross-carrier scheduling mode; wherein the second preset condition comprises: performing contention access of a channel on each carrier in the carrier set according to a same Listen Before Talk (LBT) mechanism; or, performing contention access of a channel according to a different Listen Before Talk (LBT) mechanism on each carrier in the carrier set; the access module comprises:

a first access unit, configured to perform contention access on a channel on each carrier according to a specified listen before talk LBT mechanism when the scheduling manner is the self-carrier scheduling manner; the specified listen before talk, LBT, mechanism comprises one of: LBT Cat2 mechanism; enhanced LBT Cat2 mechanism; a configured LBT Cat4 mechanism for long time to perform LBT procedure but small random backoff value N; a fast listen before talk, LBT, mechanism; wherein the fast listen before talk, LBT, mechanism comprises one of: delay period + extended clean channel assessment defer period + ECCA procedure, or, directly extended clean channel assessment ECCA procedure.

19. The apparatus of claim 18, wherein the first preset condition comprises: a base station indication; or, combining the base station indication with the user equipment UE selection; or, the user equipment UE autonomously selects; alternatively, it is predefined.

20. The apparatus of claim 18, wherein the execution unit is configured to select whether to execute the uplink LBT mechanism or execute the LBT Cat2 mechanism when a Gap duration Gap between the downlink transmission burst and the uplink transmission burst is less than or equal to a preset threshold.

21. The apparatus of claim 18, wherein the apparatus comprises:

a first determining module, configured to, when the specified listen before talk mechanism is the LBT Cat2 mechanism, perform contention access of a channel according to the LBT Cat2 mechanism on each carrier in the carrier set when performing contention access of the channel according to the LBT Cat2 mechanism on each carrier, and determine to acquire a use right of a carrier successfully completing the LBT Cat2 mechanism for a carrier successfully completing the LBT Cat2 mechanism; alternatively, the first and second electrodes may be,

a second determining module, configured to perform the LBT Cat2 mechanism successfully on S carriers among the K carriers, and when the LBT Cat2 mechanism fails to be performed on the remaining carriers, if the total number of carriers that successfully perform the LBT Cat2 mechanism does not meet a specific number of carriers, process in a preset manner; wherein, the preset mode comprises: randomly selecting carriers to satisfy a specific number of carriers among carriers failing to perform the LBT Cat2 mechanism; or, directly evaluating that the transmission device acquires the use right of the carrier on the carrier which fails to execute the LBT Cat2 mechanism; if the total number of carriers successfully performing the LBT Cat2 mechanism satisfies a specific number of carriers, the transmission device uses or considers to acquire the use right of successfully completing the LBT Cat2 mechanism carrier.

22. The apparatus of claim 21, wherein the successful execution of the LBT Cat2 mechanism comprises: if the channel is detected to be idle from busy, and the continuous idle time of the detection channel is greater than or equal to the preset idle channel assessment CCA detection time length, or the continuous idle time of the detection channel is greater than or equal to the preset idle channel assessment CCA detection time length, it is determined that the transmission device acquires the use right of the unauthorized carrier, or the LBT Cat2 process is completed.

23. The apparatus of claim 18, wherein the first access unit comprises:

a first detecting subunit, configured to perform, on each carrier, contention access to a channel according to a common fixed CCA detection starting position when the specified listen before talk mechanism is the enhanced LBT Cat2 mechanism and a detection starting position of a clear channel assessment CCA detection duration includes the fixed CCA detection starting position or a randomly selected CCA detection starting position; or the like, or, alternatively,

a second detection subunit, configured to perform contention access on a channel on each carrier according to the independent fixed CCA detection starting position; or the like, or, alternatively,

a third detecting subunit, configured to perform contention access on a channel on each carrier according to the common randomly selected CCA detection starting position; or the like, or, alternatively,

and the fourth detection subunit is configured to perform contention access on the channel on each carrier according to the independent randomly selected CCA detection start position.

24. The apparatus of claim 23, wherein when the CCA detection start position is the fixed CCA detection start position, a contention access time zone is pre-divided into K CCA detection time periods; in the K CCA detection time periods, each transmission device starts CCA detection from a fixed starting point of K different time periods, and different transmission devices have different fixed CCA detection starting points in the K different time periods; and if the detection channel is from busy to idle and the continuous detection channel idle time is greater than or equal to the CCA detection time length, or the continuous detection channel idle time is greater than or equal to a preset idle channel assessment CCA detection time length, determining that the transmission equipment acquires the use right of the unauthorized carrier, or finishing the LBT Cat2 process.

25. The apparatus of claim 23, wherein when the CCA detection start position is the randomly selected CCA detection start position, a contention access time zone is pre-divided into K CCA detection time periods; the transmission equipment randomly selects the starting point of each CCA detection time period as the starting point of the CCA detection in the K CCA detection time periods; and if the detection channel is from busy to idle and the continuous detection channel idle time is greater than or equal to the CCA detection time length, or the continuous detection channel idle time is greater than or equal to a preset idle channel assessment CCA detection time length, determining that the transmission equipment acquires the use right of the unauthorized carrier, or finishing the enhanced LBT Cat2 process.

26. The apparatus of claim 18, wherein the first access unit comprises:

a first determining subunit, configured to determine, when the specified listen-before-talk LBT mechanism is the fast listen-before-talk LBT mechanism, to acquire a carrier use right for successfully completing an LBT process under a condition that contention access of a channel is completed on each carrier according to the fast listen-before-talk LBT mechanism;

a second determining subunit, configured to perform contention access of a channel on each carrier according to the fast listen-before-talk LBT mechanism, successfully complete the carrier of the fast listen-before-talk LBT mechanism, and determine, by a transmission device, to acquire a carrier use right that successfully completes the fast listen-before-talk LBT process; on the carrier not completing the fast listen before talk LBT mechanism, the transmission device considers that the carrier is unavailable, or for the carrier not completing the fast listen before talk LBT mechanism, if a random backoff value N meets a specific threshold value, the transmission device determines to acquire the carrier use right successfully completing the fast listen before talk LBT process; if the random back-off value N does not meet a specific threshold value, judging that the use right of the carrier is not obtained or abandoning the carrier; alternatively, the first and second electrodes may be,

a third determining subunit, configured to perform contention access of a channel on each carrier according to the fast listen-before-talk LBT mechanism, where if the CCA detects that the channel is idle for the last time or for last consecutive times, the transmission device determines to acquire a carrier usage right that successfully completes the fast listen-before-talk LBT process;

a fourth determining subunit, configured to stop the current LBT process if there is a carrier that is to complete the fast listen before talk LBT mechanism, immediately perform contention access of a channel according to the LBT Cat2 mechanism, and determine, by the transmission device, to acquire a carrier usage right if the carrier completes the corresponding LBT process before the transmission start time.

27. The apparatus of claim 18, wherein the access module comprises:

a first performing unit, configured to, in a self-carrier scheduling manner, perform, on each carrier and according to an LBT Cat4 mechanism, a LBT Cat2 mechanism on a selected one or multiple carriers and not perform the LBT mechanism on other carriers in the carrier set, in a case that a base station performs contention access for a channel on each carrier;

a second performing unit, configured to perform a fast LBT mechanism on the selected one or more carriers, and not perform the LBT mechanism on other carriers in the carrier set;

a third performing unit, configured to perform a fast LBT mechanism on the selected one or more carriers, and perform an LBT Cat2 mechanism on other carriers in the carrier set when a fast LBT procedure is to be completed on the one or more carriers.

28. The apparatus of claim 27, wherein the third execution unit comprises:

a first performing subunit, configured to, when all of the random backoff values N in the fast LBT procedure performed on the one carrier decrease to a specific threshold value, start to perform the LBT Cat2 mechanism on other carriers in the carrier set; or the like, or, alternatively,

a second performing subunit, configured to, when all of the random backoff values N in the fast LBT procedures performed on the multiple carriers decrease to a specific threshold value, start to perform the LBT Cat2 mechanism on other carriers in the carrier set; wherein, the N value is decreased to the carrier wave with a specific threshold value first to execute self-delay operation; or the like, or, alternatively,

a third performing subunit, configured to perform a decrementing operation on the random backoff value N of each carrier when the fast LBT procedure is performed on the multiple carriers and a channel idle is detected at the same time, and when the value N is decremented to a specific threshold, start to perform the LBT Cat2 mechanism on other carriers in the carrier set.

29. The apparatus of claim 18, wherein the access module comprises:

a fourth performing unit, configured to, when the preset scheduling manner is the self-carrier scheduling manner, perform channel contention access on a primary carrier selected by a base station according to an LBT Cat4 mechanism and an auxiliary carrier selected by the base station according to an LBT Cat2 mechanism, perform an LBT Cat2 mechanism on the primary carrier indicated by the base station, and perform a simplified LBT Cat4 or a fast LBT mechanism on the auxiliary carrier indicated by the base station side; or the like, or, alternatively,

a fifth performing unit, configured to perform an LBT Cat2 mechanism on each carrier in the carrier set; or the like, or, alternatively,

a sixth performing unit, configured to perform, on each carrier in the set of carriers, an LBT Cat4 or a fast LBT mechanism configured for performing an LBT procedure for a long time but with a relatively small random backoff value N; or the like, or, alternatively,

a seventh performing unit, configured to perform, on a carrier on which the base station performs LBT Cat4, an LBT Cat4 configured for a long time to perform an LBT procedure but with a relatively small random backoff value N or perform a fast LBT procedure, on a carrier on which the base station performs LBT Cat2, without performing an LBT mechanism; or the like, or, alternatively,

an eighth execution unit, configured to, on a carrier on which the base station successfully executes LBT, if a Gap between a downlink transmission burst and an uplink transmission burst is smaller than a preset value, not execute an LBT mechanism, or execute an LBT Cat2 mechanism.

30. The apparatus of claim 18, wherein the access module comprises:

a ninth executing unit, configured to execute a specified LBT Cat4 mechanism on each carrier in the carrier set when the preset scheduling manner is a cross-carrier scheduling manner; the specified LBT Cat4 mechanism is an LBT process with random backoff, wherein the maximum contention window size is larger than the contention window of the self-carrier scheduling execution LBT Cat4 and smaller than the contention window of the downlink execution LBT Cat4 mechanism; alternatively, the first and second electrodes may be,

a tenth performing unit, configured to perform a fast LBT mechanism on each carrier in the carrier set; wherein: the fast LBT mechanism includes: defer period + ECCA or direct ECCA process; alternatively, the first and second electrodes may be,

an eleventh performing unit, configured to perform an LBT Cat2 mechanism on remaining carriers when performing the specified LBT Cat4 mechanism on the selected one or more carriers in the carrier set is about to succeed; alternatively, the first and second electrodes may be,

a twelfth performing unit, configured to perform a specific LBT Cat4 mechanism on one or more selected carriers in the carrier set, and perform a fast LBT mechanism on the remaining carriers; alternatively, the first and second electrodes may be,

a thirteenth performing unit, configured to perform a fast LBT mechanism on one or more selected carriers in the carrier set, and perform an LBT Cat2 mechanism on the remaining carriers.

31. The apparatus of claim 30, further comprising:

a fifth determining subunit, configured to determine, in a case that the specified LBT Cat4 mechanism or the fast LBT mechanism is completed on each carrier in the carrier set, that usage rights of carriers successfully completing the specified LBT Cat4 mechanism or the fast LBT mechanism are obtained; or the like, or, alternatively,

a sixth determining subunit, configured to stop, in the carrier set, an LBT procedure on another carrier that is executing the specified LBT Cat4 mechanism or the fast LBT mechanism and immediately execute an LBT Cat2 mechanism, if a current random backoff value N satisfies a preset threshold value, in a carrier that is about to complete the specified LBT Cat4 mechanism or the fast LBT mechanism; under the condition that the carrier corresponding to the LBT process is completed on each carrier, the transmission equipment judges to acquire the use right of the carrier successfully completing the LBT process; or the like, or, alternatively,

a seventh determining subunit, configured to determine to acquire a usage right of a carrier that successfully completes an LBT procedure when the specified LBT Cat4 mechanism or the fast LBT mechanism is completed on a part of carriers in the carrier set and a current random backoff value N on a carrier that does not complete the specified LBT Cat4 procedure or the fast LBT mechanism satisfies a preset threshold; or the like, or, alternatively,

an eighth determining subunit, configured to determine, by the transmitting device, a right to use the acquired carrier if the CCA detection channel on the carrier of the specified LBT Cat4 procedure or the fast LBT mechanism is not idle for the last time or for the last consecutive times before the transmission start time.

32. The apparatus of claim 30, wherein the eleventh execution unit comprises:

a ninth determining subunit, configured to, when the specified LBT Cat4 mechanism is to be successfully executed on a selected carrier in the carrier set, execute the LBT Cat2 mechanism on the remaining carriers, and when each carrier completes its corresponding LBT procedure, determine to acquire a use right of a carrier that successfully completes the LBT procedure; alternatively, the first and second electrodes may be,

a tenth determining subunit, configured to, when the specified LBT Cat4 mechanism is to be executed on each of the multiple carriers selected in the carrier set and is to be successful at the same time, execute the LBT Cat2 mechanism on the remaining carriers, and when each carrier completes its corresponding LBT procedure, determine to acquire a use right of a carrier that successfully completes the LBT procedure; alternatively, the first and second electrodes may be,

an eleventh determining subunit, configured to execute the specified LBT Cat4 mechanism on multiple carriers selected in the carrier set, if at least one carrier is to complete the specified LBT Cat4 mechanism, execute the LBT Cat2 mechanism on the remaining carriers, and when each carrier completes its corresponding LBT procedure, determine to acquire the usage right of the carrier that successfully completes the LBT procedure.

33. The apparatus of claim 30, wherein the twelfth execution unit comprises:

a twelfth determining subunit, configured to execute the specified LBT Cat4 mechanism on a selected carrier in the carrier set, and determine to acquire the usage right of a carrier that successfully completes an LBT procedure if a corresponding LBT procedure is completed before transmission starts on each carrier when the fast LBT mechanism is executed on the remaining carriers; alternatively, the first and second electrodes may be,

a thirteenth determining subunit, configured to execute the specified LBT Cat4 mechanism on a selected carrier in the carrier set, and under the condition that the fast LBT mechanism is executed on the remaining carriers, if a corresponding LBT procedure is not completed on a part of carriers before transmission starts on each carrier, determine to acquire a use right of a carrier that successfully completes the LBT procedure if a current random backoff value N on the carrier that does not complete the LBT procedure satisfies a preset threshold value; alternatively, the first and second electrodes may be,

a fourteenth determining subunit, configured to execute the specified LBT Cat4 mechanism on a selected carrier in the carrier set, and if there is an incomplete corresponding LBT procedure on a part of carriers before transmission starts on each carrier under the condition that the fast LBT mechanism is executed on the remaining carriers, determine to acquire a right to use of a carrier that successfully completes the LBT procedure if a CCA detects that a channel is idle for the last time or for the last consecutive times on the carrier that does not complete the LBT procedure; alternatively, the first and second electrodes may be,

a fifteenth determining subunit, configured to execute the specified LBT Cat4 mechanism on multiple carriers selected in the carrier set, and in a case that the fast LBT mechanism is executed on remaining carriers, if a random backoff value N of a corresponding LBT procedure on one carrier satisfies a specific threshold, stop respective LBT procedures on the remaining carriers, and immediately execute an LBT Cat2 mechanism; if each carrier finishes the corresponding LBT process before the transmission starts, judging to acquire the use right of the carrier which successfully finishes the LBT process; alternatively, the first and second electrodes may be,

a sixteenth determining subunit, configured to execute the specified LBT Cat4 mechanism on a plurality of carriers selected in the carrier set, and in a case that the fast LBT mechanism is executed on the remaining carriers, if a carrier completes a corresponding LBT procedure before transmission starts, send a reservation signal, or execute a self-delay operation; the carrier which does not complete the corresponding LBT process continues to execute CCA detection, if the carrier which does not complete the LBT process at the transmission starting moment still judges that the current random backoff value N on the carrier meets a specific threshold value or a CCA detection channel is idle for the last time or a plurality of times, the use right of the carrier which successfully completes the LBT process is obtained; alternatively, the first and second electrodes may be,

a seventeenth determining subunit, configured to execute the specified LBT Cat4 mechanism on multiple carriers selected in the carrier set, and if the fast LBT mechanism is executed on the remaining carriers, perform contention access on a channel according to the respective LBT mechanism on each carrier, and if the corresponding LBT mechanism is completed on a carrier that completes the LBT process before the transmission start time, determine, by the transmission device, to acquire a use right of the carrier that successfully completes the LBT process; alternatively, the first and second electrodes may be,

an eighteenth determining subunit, configured to execute the specified LBT Cat4 mechanism on multiple carriers selected in the carrier set, and if the fast LBT mechanism is executed on the remaining carriers, perform contention access on a channel according to the respective LBT mechanism on each carrier, and if the LBT process is not completed on the carrier before the transmission start time, determine, by the transmission device, that the usage right of the carrier that completes the LBT process is successfully acquired if a current random backoff value N on each carrier satisfies a preset threshold value, or a CCA detection channel is idle for the last time or last consecutive times; alternatively, the first and second electrodes may be,

a nineteenth determining subunit, configured to execute the specified LBT Cat4 mechanism on multiple carriers selected in the carrier set, and if the fast LBT mechanism is executed on remaining carriers, and if a random backoff value N on a carrier satisfies a first threshold, adjust the random backoff values N on other carriers to the first threshold; if the random backoff value N on the carrier after the adjustment of the random backoff value N meets the second threshold value, adjusting the random backoff values N on the other carriers 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 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 meets the carrier with the preset threshold value, or if the CCA detection channel is idle for the last time or last continuous times, the transmission device determines to acquire the usage right of the carrier successfully completing the LBT process.

34. The apparatus of claim 18, further comprising:

a first execution module, configured to execute a processing procedure according to a preset manner when a carrier failing to contend for access to a channel according to the listen before talk LBT mechanism or a data packet to be transmitted on the carrier; wherein, the preset mode comprises one of: dropping a carrier on which LBT failed to be performed or dropping transmission on the carrier; retransmitting a data packet on a carrier on which the LBT failed to be performed; transmitting the data packet on the alternative resource on the carrier wave which is successfully competed; using a backup unlicensed carrier; multiplexing the same resources on other carriers to transmit respective data packets together; wherein, different data are sent on the same resource, if the rank indication RI is greater than 2, the resource can be multiplexed for transmission, or different data blocks are sent on the same resource through the random access radio network temporary identifier RNTI or the cyclic shift CS code.

35. A multi-carrier contention access system, comprising: a base station and a terminal, the base station is connected with the terminal in communication, wherein, the terminal is the multi-carrier contention access apparatus according to any one of claims 18 to 34.