CN116939870A

CN116939870A - Communication method and communication device

Info

Publication number: CN116939870A
Application number: CN202210327352.2A
Authority: CN
Inventors: 吴昊; 彭文杰
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2022-03-30
Filing date: 2022-03-30
Publication date: 2023-10-24
Also published as: WO2023185346A1

Abstract

The application discloses a communication method and a communication device, and relates to the technical field of wireless communication. The method comprises the following steps: executing a first Listen Before Talk (LBT) according to a first Channel Access Priority (CAPC) corresponding to a first logical channel, wherein the first logical channel is a logical channel with buffer data; generating a first transport block; and determining to transmit the first transmission block through the idle resource detected by the first LBT or the idle resource detected by the second LBT according to the first CAPC and the CAPC corresponding to the first transmission block. The method can improve the efficiency of accessing the channel under the unlicensed spectrum and improve the communication efficiency.

Description

Communication method and communication device

Technical Field

The present application relates to the field of wireless communications technologies, and in particular, to a communication method and a communication device.

Background

In a communication system, in order to fairly use unlicensed spectrum, a terminal device needs to listen before talk (Listen Before Talk, LBT) before transmitting data, detect whether a channel is idle, and thus transmit data using the idle channel.

Currently, in a scenario in which direct communication is performed between terminal devices through a Side Link (SL), the terminal devices need to determine a time-frequency resource through sensing or selection, then packet data according to the determined time-frequency resource to obtain a transport block (Transmission Block, TB), and then LBT is performed on a channel according to a channel access priority (Channel Access Priority Classes, CAPC) corresponding to the transport block, so that an idle channel is accessed to use the idle resource to transmit the TB.

However, the terminal device in the above communication method has low efficiency of accessing the channel under the unlicensed spectrum, resulting in low communication efficiency.

Disclosure of Invention

The embodiment of the application provides a communication method and a communication device, which can improve the efficiency of accessing a channel under an unlicensed spectrum and improve the communication efficiency.

In a first aspect, an embodiment of the present application provides a communication method, including:

executing a first Listen Before Talk (LBT) according to a first Channel Access Priority (CAPC) corresponding to a first logical channel, wherein the first logical channel is a logical channel with buffer data;

generating a first transport block;

and determining to transmit the first transmission block through the idle resource detected by the first LBT or the idle resource detected by the second LBT according to the first CAPC and the CAPC corresponding to the first transmission block.

In an embodiment of the present application, a communication method is provided, specifically, when buffer data exists in a first logical channel, a first LBT is executed according to a first cap corresponding to the first logical channel, and then a first transport block is generated for data packet, and then according to the first cap and a cap corresponding to the first transport block, it is determined that a first transport block is sent through idle resources detected by the first LBT or a first transport block is sent through idle resources detected by a second LBT, where the cap of the second LBT is a cap corresponding to the first transport block. Compared with the existing communication method that a transmission block is generated by firstly grouping packets and then executing LBT, and the transmission block is transmitted through idle resources detected by the LBT, the embodiment of the application advances the time for executing the LBT, reduces the time for waiting for the completion of grouping packets to generate the transmission block, but firstly executes the LBT according to the CAPC corresponding to the logic channel with the cache data, then generates the transmission block for the data grouping packets, and transmits the transmission block through the idle resources detected by the LBT, thereby improving the efficiency of accessing the channel under the unlicensed spectrum, and improving the communication efficiency.

In a possible implementation manner, the determining, according to the first CAPC and the CAPC corresponding to the first transport block, to send the first transport block through the idle resource detected by the first LBT or the idle resource detected by the second LBT includes:

and determining that the idle resource detected by the first LBT transmits the first transmission block, wherein the CAPC corresponding to the first transmission block is not lower than the first CAPC.

In an embodiment of the present application, a possible implementation manner is provided, specifically, after generating a first transport block for a data packet, determining that a idle resource detected by a first LBT transmits the first transport block, where a cap corresponding to the first transport block generated for the data packet is required to be not lower than the first cap. According to the embodiment of the application, the first transmission block is generated for the data packet based on the constraint condition that the CAPC corresponding to the first transmission block is not lower than the first CAPC, and the first transmission block is determined to be transmitted through the idle resource detected by the first LBT, so that the time for LBT is advanced, the time for waiting for completing the generation of the transmission block for the packet is reduced, the efficiency of LBT for the channel is improved, the idle resource detected by the first LBT after the first transmission block is generated for the packet is enabled to be transmitted, the time for waiting for executing the LBT is reduced, the efficiency of accessing the channel under an unlicensed spectrum is improved, and the communication efficiency is improved.

In one possible implementation manner, the generating the first transport block includes:

determining a first communication connection, the first communication connection comprising at least one logical channel having a cap not lower than the first cap;

and grouping data in one or more logic channels included in the first communication connection to obtain the first transmission block.

In an embodiment of the present application, a possible implementation manner is provided, specifically, a communication connection including at least one logical channel not lower than the first CAPC is determined as a first communication connection, that is, the determined first communication connection needs to satisfy the logical channel including at least one logical channel not lower than the first CAPC, where the first communication connection refers to a communication connection determined by a destination MAC ID, and the communication connection includes a communication connection in a unicast/multicast/broadcast manner. Because the first communication connection comprises at least one logic channel which is not lower than the first CAPC, when data in one or more logic channels which are included in the first communication connection are packed, the generated first transmission block needs to meet the packing principle that the CAPC is not lower than the first CAPC, and the first transmission block can be sent through idle resources detected by the first LBT after being generated, so that the time for waiting for executing the LBT is reduced, the efficiency of accessing the channels under an unlicensed spectrum is improved, and the communication efficiency is improved.

In one possible implementation, the first communication connection includes the first logical channel.

In the embodiment of the present application, a possible implementation manner is provided, specifically, the communication connection including the first logic channel is determined as the first communication connection, that is, the determined first communication connection is required to meet the condition including the first logic channel. The first communication connection determined by the embodiment of the application comprises the first logic channel, and the CAPC corresponding to the first logic channel is the CAPC corresponding to the execution of the first LBT, so that the data in the first logic channel can be packetized to generate the first transmission block, and the first transmission block can be transmitted through the idle resource detected by the first LBT after being generated according to the generated first transmission block meeting the packetizing principle that the CAPC is not lower than the first CAPC, thereby reducing the time for waiting to execute the LBT, improving the efficiency of accessing the channel under the unlicensed spectrum and improving the communication efficiency.

In one possible implementation, the first communication connection includes a second logical channel; the second logical channel is a logical channel with the highest logical channel priority in the first communication connection, and the CAPC corresponding to the second logical channel is not lower than the first CAPC.

In an embodiment of the present application, a possible implementation manner is provided, specifically, for each communication connection, a communication connection including a second logical channel is determined as a first communication connection, where the second logical channel is a logical channel with higher logical channel priority that satisfies that CACP is not lower than that of the first cape, where the second logical channel corresponds to a cape that is not lower than that of the first cape, and the second logical channel is a logical channel with higher logical channel priority, which may be a logical channel with highest logical channel priority, or may be a logical channel with several bits before the priority ordering of the logical channels. The first communication connection determined by the embodiment of the application comprises the second logic channel, so that the data in the second logic channel can be packetized to generate the first transmission block, the generated first transmission block meets the packetizing principle that the CAPC is not lower than the first CAPC, and the idle resources detected by the first LBT after the first transmission block is generated can be transmitted, thereby reducing the time for waiting for executing the LBT, improving the efficiency of accessing the channel under the unlicensed spectrum and improving the communication efficiency.

In a possible implementation manner, the grouping the data in one or more logical channels included in the first communication connection includes:

According to the CAPC and/or logic channel priority, performing resource allocation on one or more logic channels in the first communication connection;

and according to the resources corresponding to the one or more logic channels in the first communication connection, grouping the data in the one or more logic channels.

In an embodiment of the present application, a possible implementation manner is provided, specifically, according to the cape and/or the logic channel priority, resource allocation is performed on one or more logic channels in the first communication connection, and according to the respective allocated resources, data in one or more logic channels are packetized, so as to generate the first transport block. According to the embodiment of the application, based on resource allocation of each logic channel in the first communication connection, data in the logic channels respectively allocated to the resources can be selectively packetized, so that the generated first transmission block meets the packetizing principle that CAPC is not lower than that of the first CAPC, and the idle resources detected by the first LBT can be transmitted after the first transmission block is generated, thereby reducing the time for waiting for executing the LBT, improving the efficiency of accessing the channels under an unlicensed spectrum and improving the communication efficiency.

In a possible implementation manner, the allocating resources to one or more logical channels in the first communication connection includes:

According to the first information and the second information, performing resource allocation on one or more logic channels in the first communication connection; the first information includes side uplink control channel (SCCH) information and CAPC information corresponding to the SCCH in the first communication connection, and the second information includes media access control layer (MAC) control element (MAC CE) information and CAPC information corresponding to the MAC CE in the first communication connection.

In the embodiment of the present application, a possible implementation manner is provided, specifically, for a plurality of different logical channels, the priority of the logical channels should be different according to the importance of the information, and on the priority of the logical channels, the SCCH of the side uplink control channel is higher than the MAC CE of the control element of the medium access control layer, and the MAC CE is higher than the STCH of the side uplink traffic channel. According to the embodiment of the application, according to the first information and the second information, one or more logic channels in the first communication connection are sequentially allocated with resources according to the logic channel priority order and the CAPC order, and the data in the logic channels respectively allocated with the resources can be selectively packetized to generate the first transmission block conforming to the packetizing principle.

In a possible implementation manner, the allocating resources to one or more logic channels in the first communication connection according to the first information and the second information includes:

under the condition that the first communication connection meets a first condition, performing resource allocation on the SCCH with higher CAPC;

sequentially distributing the resources of the rest SCCH, the MAC CE and the STCH according to the order of the logic channel priority from high to low;

wherein, the first condition includes that the SCCH exists in the first communication connection and the CAPC corresponding to the existing SCCH is not lower than the first CAPC.

In one possible embodiment, the method further comprises:

if the first communication connection does not meet the first condition and meets a second condition, performing resource allocation on the MAC CE with the higher CAPC;

sequentially distributing the resources of the rest MAC CEs and the STCHs according to the order of the priority of the logic channels from high to low;

the second condition includes that a MAC CE exists in the first communication connection and a cap corresponding to the MAC CE exists not lower than the first cap.

In one possible embodiment, the method further comprises:

and when the first communication connection does not meet the first condition and does not meet the second condition, sequentially allocating resources to the STCH and the MAC CE of which the CAPC is not lower than the first CAPC according to the order of the logic channel priority from high to low.

according to the third information and the fourth information, performing resource allocation on one or more logic channels in the first communication connection; the third information includes SCCH information in the first communication connection, and the fourth information includes MAC CE information in the first communication connection and CAPC information corresponding to the MAC CE.

In the embodiment of the present application, a possible implementation manner is provided, specifically, for a plurality of different logical channels, the priority of the logical channels should be different according to the importance of the information, and on the priority of the logical channels, the SCCH of the side uplink control channel is higher than the MAC CE of the control element of the medium access control layer, and the MAC CE is higher than the STCH of the side uplink traffic channel. According to the embodiment of the application, according to the third information and the fourth information, one or more logic channels in the first communication connection are sequentially allocated with resources according to the logic channel priority order and the CAPC order, and data in the logic channels respectively allocated with resources can be selectively packetized to generate the first transmission block conforming to the packetizing principle.

In a possible implementation manner, the allocating resources to one or more logic channels in the first communication connection according to the third information and the fourth information includes:

under the condition that the first communication connection meets a third condition, sequentially distributing resources of the SCCH, the MAC CE and the STCH according to the order of the logic channel priority from high to low;

wherein the third condition includes the presence of an SCCH in the first communication connection.

In one possible embodiment, the method further comprises:

if the first communication connection does not meet the third condition and meets a fourth condition, performing resource allocation on the MAC CE with higher CAPC;

sequentially distributing resources to the rest MAC CEs and the STCH of which the CAPCs are not lower than the first CAPC according to the order of the logic channel priority from high to low;

the fourth condition includes that a MAC CE exists in the first communication connection and a cap corresponding to the existence of the MAC CE is not lower than the first cap.

In one possible embodiment, the method further comprises:

and when the first communication connection does not meet the third condition and does not meet the fourth condition, sequentially allocating resources to the STCH and the MAC CE of which the CAPC is not lower than the first CAPC according to the order of the logic channel priority from high to low.

according to the fifth information and the sixth information, performing resource allocation on one or more logic channels in the first communication connection; the fifth information includes SCCH information in the first communication connection and CAPC information corresponding to the SCCH, and the sixth information includes MAC CE information in the first communication connection.

In the embodiment of the present application, a possible implementation manner is provided, specifically, for a plurality of different logical channels, the priority of the logical channels should be different according to the importance of the information, and on the priority of the logical channels, the SCCH of the side uplink control channel is higher than the MAC CE of the control element of the medium access control layer, and the MAC CE is higher than the STCH of the side uplink traffic channel. According to the embodiment of the application, according to the fifth information and the sixth information, resource allocation is sequentially carried out on one or more logic channels in the first communication connection according to the logic channel priority order and the CAPC order, and data in the logic channels respectively allocated to the resources can be selectively packetized to generate the first transmission block conforming to the packetizing principle.

In a possible implementation manner, the allocating resources to one or more logical channels in the first communication connection according to the fifth information and the sixth information includes:

under the condition that the first communication connection meets a fifth condition, performing resource allocation on the SCCH with higher CAPC;

wherein, the fifth condition includes that the SCCH exists in the first communication connection and the cap corresponding to the existence of the SCCH is not lower than the first cap.

In one possible embodiment, the method further comprises:

when the first communication connection does not meet the fifth condition and meets a sixth condition, sequentially allocating resources to the MAC CEs and the CAPCs which are not lower than the STCH of the first CAPC according to the order of the logic channel priority from high to low;

wherein the sixth condition includes the presence of a MAC CE in the first communication connection.

In one possible embodiment, the method further comprises:

and if the first communication connection does not meet the fifth condition and does not meet the sixth condition, allocating resources to the STCH of which the CAPC is not lower than the first CAPC in the order from the high priority of the logic channel.

according to the seventh information and the eighth information, performing resource allocation on one or more logic channels in the first communication connection; wherein the seventh information includes SCCH information in the first communication connection and the eighth information includes MAC CE information in the first communication connection.

In the embodiment of the present application, a possible implementation manner is provided, specifically, for a plurality of different logical channels, the priority of the logical channels should be different according to the importance of the information, and on the priority of the logical channels, the SCCH of the side uplink control channel is higher than the MAC CE of the control element of the medium access control layer, and the MAC CE is higher than the STCH of the side uplink traffic channel. According to the embodiment of the application, according to the seventh information and the eighth information, resource allocation is sequentially carried out on one or more logic channels in the first communication connection according to the logic channel priority order and the CAPC order, and data in the logic channels respectively allocated to the resources can be selectively packetized to generate the first transmission block conforming to the packetizing principle.

In a possible implementation manner, the allocating resources to one or more logic channels in the first communication connection according to the seventh information and the eighth information includes:

under the condition that the first communication connection meets a seventh condition, sequentially distributing resources of the SCCH, the MAC CE and the STCH according to the order of the logic channel priority from high to low;

wherein the seventh condition includes the presence of an SCCH in the first communication connection.

In one possible embodiment, the method further comprises:

when the first communication connection does not meet the seventh condition and meets an eighth condition, sequentially allocating resources to the MAC CEs and the CAPCs which are not lower than the STCH of the first CAPC according to the order of the logic channel priority from high to low;

wherein the eighth condition includes the presence of a MAC CE in the first communication connection.

In one possible embodiment, the method further comprises:

and if the first communication connection does not meet the seventh condition and does not meet the eighth condition, allocating resources to the STCH of the cap not lower than the first cap in the order of the logical channel priority from high to low.

under the condition that the CAPC corresponding to the first transmission block is not lower than the first CAPC, determining to send the first transmission block through the idle resource detected by the first LBT according to a first parameter corresponding to the first LBT and a second parameter corresponding to the second LBT; the first parameter characterizes the remaining times of the detection channel in the first LBT process, the second parameter characterizes the times of the detection channel configured by the second LBT, and the cap of the second LBT is the cap corresponding to the first transmission block.

In an embodiment of the present application, another possible implementation manner is provided, specifically, after generating a first transport block for a packet of data, comparing a cap corresponding to the first transport block with a first cap, where the cap corresponding to the first transport block is not lower than the first cap, and if the cap corresponding to the first transport block is not lower than the first cap, indicating that the first transport block may multiplex a result of the first LBT to transmit, determining, according to a parameter corresponding to the first LBT and a parameter corresponding to the second LBT, that the first transport block is transmitted through an idle resource detected by the first LBT. According to the embodiment of the application, under the condition that the first transmission block is generated by normal grouping, the first transmission block is transmitted by multiplexing the result of the first LBT, so that the time for executing the LBT is advanced, the time for waiting for completing the grouping to generate the transmission block is reduced, the efficiency of LBT on a channel is improved, the idle resource detected by the first LBT after the grouping to generate the first transmission block can be transmitted, the time for waiting for executing the LBT is reduced, the efficiency of accessing the channel under an unlicensed spectrum is improved, and the communication efficiency is improved.

In a possible implementation manner, the determining, according to the first parameter corresponding to the first LBT and the second parameter corresponding to the second LBT, to send the first transport block through the idle resource detected by the first LBT includes:

and determining to transmit the first transport block through the idle resource detected by the first LBT under the condition that the first parameter is smaller than the second parameter.

In an embodiment of the present application, a possible implementation manner is provided, specifically, when the number of times of detecting the remaining number of channels in the first LBT process is smaller than the number of times of detecting the channels in the second LBT configuration, it is determined that the first transport block is sent through the idle resources detected by the first LBT. According to the embodiment of the application, the first transmission block can be sent by multiplexing the result of the first LBT, so that the time for executing the LBT is advanced, the time for waiting for completing the generation of the transmission block by the packet is reduced, the LBT efficiency of the channel is improved, the first transmission block can be accessed to the channel of the unlicensed spectrum as soon as possible, the channel accessing efficiency under the unlicensed spectrum is improved, and the communication efficiency is improved.

In one possible embodiment, the method further comprises:

and under the condition that the CAPC corresponding to the first transmission block is lower than the first CAPC, determining to transmit the first transmission block through the idle resources detected by the second LBT.

In an embodiment of the present application, a possible implementation manner is provided, specifically, a first LBT is executed according to a cap corresponding to a logical channel in which buffered data exists, and then a comparison is performed between a cap corresponding to the first LBT (i.e., a first cap), and a cap corresponding to a second LBT (i.e., a cap corresponding to a first transport block) corresponding to a cap triggered when a packet is formed to obtain the first transport block, where under a condition that the cap corresponding to the first transport block is lower than the first cap, the second LBT is determined to be executed, and the first transport block is sent through idle resources detected by the second LBT. By the embodiment of the application, the channel can be successfully accessed under the unlicensed spectrum, and the communication function is ensured.

In one possible embodiment, the method further comprises:

and determining to transmit the first transport block through the idle resource detected by the second LBT under the condition that the first parameter is greater than or equal to the second parameter.

In an embodiment of the present application, a possible implementation manner is provided, specifically, a first LBT is executed according to a cap corresponding to a logical channel in which data is buffered, and then a comparison is performed between a cap corresponding to the first LBT (i.e., a first cap) and a cap corresponding to a second LBT (i.e., a cap corresponding to a first transport block triggered by grouping the first transport block), where the cap corresponding to the first transport block is not lower than the first cap, and when the number of times of detecting a channel remaining in the first LBT process is greater than or equal to the number of times of detecting a channel configured by the second LBT, the second LBT is determined, and the first transport block is sent through idle resources detected by the second LBT. By the embodiment of the application, the channel can be successfully accessed under the unlicensed spectrum, and the communication function is ensured.

In a second aspect, an embodiment of the present application provides a communication method, including:

generating a first transmission block, wherein the CAPC corresponding to the first transmission block is not lower than the first CAPC;

and determining to transmit the first transport block through the idle resources detected by the first LBT.

In the embodiment of the application, a communication method is provided, specifically, when buffer data exists in a first logic channel, a first LBT is executed according to a first CAPC corresponding to the first logic channel, then a first transmission block is generated for data packet based on the packet packing principle that the CAPC corresponding to the generated first transmission block is not lower than the first CAPC, and then the first transmission block is determined to be sent through idle resources detected by the first LBT. Compared with the conventional communication method that a transmission block is generated by firstly grouping packets and then executing LBT, and the transmission block is transmitted through idle resources detected by the LBT, the embodiment of the application advances the time for executing the LBT, reduces the time for waiting for completing the grouping of the packets to generate the transmission block, but firstly executes the LBT according to the CAPC corresponding to the logic channel with cache data, and then generates the first transmission block for the data grouping packets based on the constraint condition that the CAPC corresponding to the first transmission block is not lower than the first CAPC, so that the first transmission block can be transmitted through the idle resources detected by the first LBT after the grouping of the packets is generated, reduces the time for waiting for executing the LBT, improves the efficiency of accessing the channel under an unlicensed spectrum, and improves the communication efficiency.

With regard to the technical effects brought about by the second aspect and any one of the possible embodiments, reference may be made to the description of the technical effects corresponding to the first aspect and the corresponding embodiments.

In a third aspect, an embodiment of the present application provides a communication method, including:

Generating a first transport block;

In the embodiment of the application, a communication method is provided, specifically, when buffer data exists in a first logic channel, a first LBT is executed according to a first cap corresponding to the first logic channel, a first transmission block is generated after data is packetized, the cap corresponding to the first transmission block is compared with the first cap, and under the condition that the cap corresponding to the first transmission block is not lower than the first cap, the result of multiplexing the first LBT by the first transmission block is indicated to be sent, and according to parameters corresponding to the first LBT and parameters corresponding to a second LBT, the first transmission block is determined to be sent through idle resources detected by the first LBT. Compared with the conventional communication method that a transmission block is generated by firstly grouping packets and then executing LBT, and the transmission block is transmitted through idle resources detected by the LBT, the embodiment of the application advances the time for executing the LBT, reduces the time for waiting for completing the grouping of the packets to generate the transmission block, but firstly executes the LBT according to the CAPC corresponding to the logic channel with the cache data, then generates a first transmission block for the grouping of the data packets, and transmits the first transmission block through multiplexing the result of the first LBT, thereby reducing the time for waiting for executing the LBT, improving the channel access efficiency under the unlicensed spectrum and improving the communication efficiency.

In one possible embodiment, the method further comprises:

and under the condition that the CAPC corresponding to the first transmission block is lower than the first CAPC, determining that the first transmission block is transmitted through the idle resource detected by a second LBT, wherein the CAPC of the second LBT is the CAPC corresponding to the first transmission block.

In one possible embodiment, the method further comprises:

With regard to the technical effects brought about by the third aspect and any one of the possible embodiments, reference may be made to the description of the technical effects corresponding to the first aspect and the corresponding embodiments.

In a fourth aspect, an embodiment of the present application provides a communication apparatus, including:

The LBT unit is used for executing first Listen Before Talk (LBT) according to a first channel access priority CAPC corresponding to a first logical channel, wherein the first logical channel is a logical channel with buffer data;

a generation unit configured to generate a first transport block;

and the determining unit is used for determining to send the first transmission block through the idle resource detected by the first LBT or the idle resource detected by the second LBT according to the first CAPC and the CAPC corresponding to the first transmission block.

In a possible implementation manner, the determining unit is specifically configured to determine that the first transport block is sent through the idle resource detected by the first LBT, where a cap corresponding to the first transport block is not lower than the first cap.

In one possible embodiment, the apparatus further comprises:

the determining unit is further configured to determine a first communication connection, where the first communication connection includes at least one logical channel that is not lower than the first cape;

and the packet grouping unit is used for grouping the data in one or more logic channels included in the first communication connection to obtain the first transmission block.

In one possible embodiment, the apparatus further comprises:

a resource allocation unit, configured to allocate resources to one or more logical channels in the first communication connection according to the caps and/or the logical channel priorities;

the packet grouping unit is specifically configured to group data in one or more logical channels according to resources corresponding to the one or more logical channels in the first communication connection.

In a possible implementation manner, the resource allocation unit is specifically configured to allocate resources to one or more logical channels in the first communication connection according to the first information and the second information; the first information includes side uplink control channel (SCCH) information and CAPC information corresponding to the SCCH in the first communication connection, and the second information includes media access control layer (MAC) control element (MAC CE) information and CAPC information corresponding to the MAC CE in the first communication connection.

In a possible implementation manner, the resource allocation unit is specifically configured to allocate resources to a SCCH higher than the CAPC if the first communication connection meets a first condition;

In a possible implementation manner, the resource allocation unit is specifically configured to allocate resources to a MAC CE with a higher cap when the first communication connection does not meet the first condition and meets a second condition;

In one possible implementation manner, the resource allocation unit is specifically configured to, when the first communication connection does not meet the first condition and does not meet the second condition, sequentially allocate resources to STCH and MAC CE where the caps are not lower than the first caps in order of logical channel priority from high to low.

In a possible implementation manner, the resource allocation unit is specifically configured to allocate resources to one or more logical channels in the first communication connection according to the third information and the fourth information; the third information includes SCCH information in the first communication connection, and the fourth information includes MAC CE information in the first communication connection and CAPC information corresponding to the MAC CE.

In one possible implementation manner, the resource allocation unit is specifically configured to allocate resources to the SCCH, the MAC CE, and the STCH sequentially according to the order of the logical channel priority from high to low when the first communication connection meets a third condition;

In a possible implementation manner, the resource allocation unit is specifically configured to allocate resources to a MAC CE with a higher cap when the first communication connection does not meet the third condition and meets a fourth condition;

In one possible implementation manner, the resource allocation unit is specifically configured to, when the first communication connection does not meet the third condition and does not meet the fourth condition, sequentially allocate resources to STCH and MAC CE where the caps are not lower than the first caps in order of logical channel priority from high to low.

In a possible implementation manner, the resource allocation unit is specifically configured to allocate resources to one or more logical channels in the first communication connection according to fifth information and sixth information; the fifth information includes SCCH information in the first communication connection and CAPC information corresponding to the SCCH, and the sixth information includes MAC CE information in the first communication connection.

In a possible implementation manner, the resource allocation unit is specifically configured to allocate resources to a higher SCCH of the CAPC if the first communication connection meets a fifth condition;

In one possible implementation manner, the resource allocation unit is specifically configured to, when the first communication connection does not meet the fifth condition and meets a sixth condition, sequentially allocate resources to the MAC CE and the cap from the STCH of the first cap in order of higher priority of the logical channels;

In one possible implementation manner, the resource allocation unit is specifically configured to allocate resources to the STCH that the caps are not lower than the first caps in order of higher priority of the logical channels when the first communication connection does not meet the fifth condition and does not meet the sixth condition.

In a possible implementation manner, the resource allocation unit is specifically configured to allocate resources to one or more logical channels in the first communication connection according to seventh information and eighth information; wherein the seventh information includes SCCH information in the first communication connection and the eighth information includes MAC CE information in the first communication connection.

In one possible implementation manner, the resource allocation unit is specifically configured to, when the first communication connection meets a seventh condition, sequentially allocate resources to the SCCH, the MAC CE, and the STCH according to a sequence from high to low of a logical channel priority;

In one possible implementation manner, the resource allocation unit is specifically configured to, when the first communication connection does not meet the seventh condition and meets an eighth condition, sequentially allocate resources to the MAC CE and the cape from the STCH of the first cape to the STCH of the first cape in order of higher priority of the logical channels;

In one possible implementation manner, the resource allocation unit is specifically configured to allocate resources to the STCH that the caps are not lower than the first caps in order of higher priority of the logical channels when the first communication connection does not meet the seventh condition and does not meet the eighth condition.

In a possible implementation manner, the determining unit is further configured to determine, when the cap corresponding to the first transport block is not lower than the first cap, to send the first transport block through the idle resource detected by the first LBT according to the first parameter corresponding to the first LBT and the second parameter corresponding to the second LBT; the first parameter characterizes the remaining times of detecting the channel in the first LBT process, the second parameter characterizes the times of detecting the channel in the second LBT process, and the cap of the second LBT is the cap corresponding to the first transmission block.

In a possible implementation manner, the determining unit is specifically configured to determine that the first transport block is transmitted through the idle resource detected by the first LBT if the first parameter is smaller than the second parameter.

In a possible implementation manner, the determining unit is further configured to determine that the first transport block is sent through the idle resource detected by the second LBT, where a cap corresponding to the first transport block is lower than the first cap.

In a possible implementation manner, the determining unit is further configured to determine, when the first parameter is greater than or equal to the second parameter, to send the first transport block through the idle resource detected by the second LBT.

It may be understood that the LBT unit, the generating unit, the determining unit, the packet unit, and the resource allocation unit in the embodiment of the present application may be collectively referred to as a processing unit.

Alternatively, the above units may be integrated into the same processing unit, and the processing unit executes the method steps corresponding to the above units; for example:

the processing unit is used for executing a first Listen Before Talk (LBT) according to a first Channel Access Priority (CAPC) corresponding to a first logic channel, wherein the first logic channel is a logic channel with buffer data;

The processing unit is further configured to generate a first transport block;

the processing unit is further configured to determine, according to the first cape and a cape corresponding to the first transport block, to send the first transport block through the idle resource detected by the first LBT or the idle resource detected by the second LBT.

Alternatively, each unit may be a plurality of independent processing units, and the plurality of processing units execute method steps corresponding to each unit respectively; for example:

the first processing unit is used for executing first Listen Before Talk (LBT) according to a first channel access priority CAPC corresponding to a first logic channel, wherein the first logic channel is a logic channel with buffer data;

a second processing unit for generating a first transport block;

and the third processing unit is used for determining to send the first transmission block through the idle resource detected by the first LBT or the idle resource detected by the second LBT according to the first CAPC and the CAPC corresponding to the first transmission block.

With regard to the technical effects brought about by the fourth aspect and any possible embodiment, reference may be made to the description of the technical effects corresponding to the first aspect and the corresponding embodiment.

In a fifth aspect, an embodiment of the present application provides a communication apparatus, including:

a generating unit, configured to generate a first transport block, where a caps corresponding to the first transport block is not lower than the first caps;

and a determining unit, configured to determine that the first transport block is transmitted through the idle resource detected by the first LBT.

In one possible embodiment, the apparatus further comprises:

The processing unit is further configured to generate a first transport block, where a caps corresponding to the first transport block is not lower than the first caps;

the processing unit is further configured to determine to send the first transport block through the idle resource detected by the first LBT.

the second processing unit is used for generating a first transmission block, and the CAPC corresponding to the first transmission block is not lower than the first CAPC;

and a third processing unit, configured to determine to transmit the first transport block through the idle resource detected by the first LBT.

With regard to the technical effects brought about by the fifth aspect and any one of the possible embodiments, reference may be made to the description of the technical effects corresponding to the second aspect and the corresponding embodiments.

In a sixth aspect, an embodiment of the present application provides a communication apparatus, including:

a generation unit configured to generate a first transport block;

a determining unit, configured to determine, when a cap corresponding to the first transport block is not lower than the first cap, to send the first transport block through the idle resource detected by the first LBT according to a first parameter corresponding to the first LBT and a second parameter corresponding to the second LBT; the first parameter characterizes the remaining times of the detection channel in the first LBT process, the second parameter characterizes the times of the detection channel configured by the second LBT, and the cap of the second LBT is the cap corresponding to the first transmission block.

In a possible implementation manner, the determining unit is further configured to determine that, in a case where a cap corresponding to the first transport block is lower than the first cap, the first transport block is sent through a idle resource detected by a second LBT, where the cap of the second LBT is the cap corresponding to the first transport block.

It may be understood that the LBT unit, the generating unit, and the determining unit in the embodiments of the present application may be collectively referred to as a processing unit.

the processing unit is further configured to generate a first transport block;

the processing unit is further configured to determine, when the caps corresponding to the first transport blocks are not lower than the first caps, to send the first transport blocks through idle resources detected by the first LBT according to a first parameter corresponding to the first LBT and a second parameter corresponding to the second LBT; the first parameter characterizes the remaining times of the detection channel in the first LBT process, the second parameter characterizes the times of the detection channel configured by the second LBT, and the cap of the second LBT is the cap corresponding to the first transmission block.

a second processing unit for generating a first transport block;

a third processing unit, configured to determine, when a cap corresponding to the first transport block is not lower than the first cap, to send the first transport block through a idle resource detected by the first LBT according to a first parameter corresponding to the first LBT and a second parameter corresponding to the second LBT; the first parameter characterizes the remaining times of the detection channel in the first LBT process, the second parameter characterizes the times of the detection channel configured by the second LBT, and the cap of the second LBT is the cap corresponding to the first transmission block.

Regarding the technical effects brought about by the sixth aspect and any possible embodiment, reference may be made to the description of the technical effects corresponding to the third aspect and the corresponding embodiment.

In a seventh aspect, an embodiment of the present application provides a communication apparatus including a processor. The processor is coupled to the memory and operable to execute instructions in the memory to implement the method of any one of the above-described first to third aspects and any one of the possible implementation manners. Optionally, the communication device further comprises a memory. Optionally, the communication device further comprises a communication interface, and the processor is coupled to the communication interface.

In an eighth aspect, an embodiment of the present application provides a processor, including: input circuit, output circuit and processing circuit. The processing circuit is configured to receive signals via the input circuit and to transmit signals via the output circuit, such that the processor performs the method of any one of the above-described first to third aspects and any one of the possible implementation manners.

In a specific implementation process, the processor may be one or more chips, the input circuit may be an input pin, the output circuit may be an output pin, and the processing circuit may be a transistor, a gate circuit, a flip-flop, various logic circuits, and the like. The input signal received by the input circuit may be received and input by, for example and without limitation, a receiver, the output signal may be output by, for example and without limitation, a transmitter and transmitted by a transmitter, and the input circuit and the output circuit may be the same circuit, which functions as the input circuit and the output circuit, respectively, at different times. The embodiment of the application does not limit the specific implementation modes of the processor and various circuits.

In a ninth aspect, an embodiment of the present application provides a communication apparatus including a processor and a memory. The processor is configured to read instructions stored in the memory and is configured to receive signals via the receiver and to transmit signals via the transmitter to perform the method of any one of the first to third aspects and any one of the possible embodiments.

Optionally, the processor is one or more, and the memory is one or more.

Alternatively, the memory may be integrated with the processor or the memory may be separate from the processor.

Specifically, the data output by the processor may be output to the transmitter, and the input data received by the processor may be from the receiver. Wherein the transmitter and receiver may be collectively referred to as a transceiver.

It will be appreciated that the communication means in the ninth aspect described above may be one or more chips. The processor in the communication device may be implemented by hardware or by software. When implemented in hardware, the processor may be a logic circuit, an integrated circuit, or the like; when implemented in software, the processor may be a general-purpose processor, implemented by reading software code stored in a memory, which may be integrated in the processor, or may reside outside the processor, and exist separately.

In a tenth aspect, embodiments of the present application provide a computer-readable storage medium storing a computer program (which may also be referred to as code, or instructions); the computer program, when run on a computer, causes the method of any one of the above-mentioned first to third aspects and any one of the possible implementation manners to be implemented.

In an eleventh aspect, embodiments of the present application provide a computer program product comprising: computer programs (also referred to as code, or instructions); the computer program, when executed, causes a computer to perform the method of any one of the above-mentioned first to third aspects and any one of the possible implementation manners.

In a twelfth aspect, an embodiment of the present application provides a chip, the chip including a processor configured to execute instructions, where the processor executes the instructions, to cause the chip to perform the method according to any one of the first aspect to the third aspect and any one of the possible implementation manners. Optionally, the chip further comprises a communication interface, and the communication interface is used for receiving signals or sending signals.

In a thirteenth aspect, an embodiment of the present application provides a communication system, including at least one communication device according to the fourth aspect, or the fifth aspect, or the sixth aspect, or the seventh aspect, or the ninth aspect, or the processor according to the eighth aspect, or the chip according to the twelfth aspect.

In a fourteenth aspect, there is provided a chip system comprising a processor and interface circuitry, the processor being for invoking from memory and running a computer program (also referred to as code, or instructions) stored in memory to perform the functions according to any one of the first to third aspects and any one of the possible implementations; in one possible design, the system-on-chip also includes memory to hold the necessary program instructions and data. The chip system can be composed of chips, and can also comprise chips and other discrete devices.

Further, in performing the method according to any one of the first to third aspects and any one of possible implementation manners of the first to third aspects, the process of sending information and/or receiving information and the like in the method may be understood as a process of outputting information by a processor and/or a process of receiving input information by a processor. In outputting the information, the processor may output the information to a transceiver (or communication interface, or transmission module) for transmission by the transceiver. After output by the processor, the information may also need to be processed further before reaching the transceiver. Similarly, when the processor receives input information, the transceiver (or communication interface, or transmission module) receives the information and inputs it to the processor. Further, after the transceiver receives the information, the information may need to be further processed before being input to the processor.

Based on the above principle, for example, the transmission information mentioned in the foregoing method may be understood as processor output information. For another example, receiving information may be understood as a processor receiving input information.

Alternatively, the operations of transmitting, receiving, etc. related to the processor may be more generally understood as operations of outputting and receiving, inputting, etc. by the processor, unless otherwise specified, or if not contradicted by actual action or inherent logic in the related description.

Alternatively, in performing the methods according to any one of the first to third aspects and any one of the possible implementation manners of the first to third aspects, the processor may be a processor dedicated to performing the methods, or may be a processor that performs the methods by executing computer instructions in a memory, such as a general-purpose processor. The Memory may be a non-transitory (non-transitory) Memory, such as a Read Only Memory (ROM), which may be integrated on the same chip as the processor, or may be separately provided on different chips, and the type of the Memory and the manner of providing the Memory and the processor are not limited in the embodiments of the present application.

In one possible embodiment, the at least one memory is located outside the device.

In yet another possible embodiment, the at least one memory is located within the device.

In yet another possible embodiment, a portion of the at least one memory is located within the device and another portion of the at least one memory is located outside the device.

In the present application, the processor and the memory may also be integrated in one device, i.e. the processor and the memory may also be integrated.

In the embodiment of the application, the time for executing the LBT is advanced, the time for waiting for completing the generation of the transmission block of the grouping packet is reduced, the LBT is executed firstly according to the CAPC corresponding to the logic channel with the cache data, the transmission block is generated for the grouping packet, and the transmission block is sent through the idle resource detected by the LBT, so that the efficiency of carrying out the LBT on the channel can be improved, the efficiency of accessing the channel under the unlicensed spectrum is improved, and the communication efficiency is improved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments of the present application will be briefly described below, and it is obvious that the drawings described below are only some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort to a person of ordinary skill in the art.

Fig. 1 is a schematic diagram of a communication system according to an embodiment of the present application;

FIG. 2 is a schematic flow chart of a resource selection according to an embodiment of the present application;

fig. 3 is a schematic flow chart of LBT detection according to an embodiment of the present application;

fig. 4 is a schematic flow chart of LBT detection according to an embodiment of the present application;

fig. 5 is a schematic flow chart of a communication method according to an embodiment of the present application;

fig. 6 is a flow chart of another communication method according to an embodiment of the present application;

fig. 7 is a schematic flow chart of logic channel resource allocation according to an embodiment of the present application;

fig. 8 is a schematic flow chart of a logic channel resource allocation according to an embodiment of the present application;

fig. 9 is a schematic flow chart of logic channel resource allocation according to an embodiment of the present application;

fig. 10 is a schematic flow chart of a logic channel resource allocation according to an embodiment of the present application;

FIG. 11 is a flow chart of another communication method according to an embodiment of the present application;

fig. 12 is a schematic structural diagram of a communication device according to an embodiment of the present application;

fig. 13 is a schematic structural diagram of a communication device according to an embodiment of the present application;

fig. 14 is a schematic structural diagram of a chip according to an embodiment of the present application.

Detailed Description

Embodiments of the present application will be described below with reference to the accompanying drawings in the embodiments of the present application.

As described in the background section, there is a need to study how to improve the efficiency of accessing channels and communication efficiency of terminal devices in unlicensed spectrum. The embodiment of the application provides a communication method and a related device, which relate to the technical field of communication, advance the time for executing LBT, reduce the time for waiting for completing the generation of a transmission block of a packet, execute the LBT according to the CAPC corresponding to a logic channel with cache data at first, then generate the transmission block for the packet of the data, and send the transmission block through idle resources detected by the LBT, thereby improving the efficiency of carrying out LBT on a channel, further improving the efficiency of accessing the channel under an unlicensed spectrum and improving the communication efficiency.

The communication method provided by the application can be applied to a scene or a system with the technical problems or similar technical problems, for example, can be applied to a communication method in an unlicensed spectrum communication scene, and in order to more clearly describe the scheme of the application, a plurality of terms related to the technical scheme of the application are introduced.

Side Link (SL): in a wireless communication system, data communication between a User Equipment (UE) and the UE may be performed through a network, or communication between the UE and the UE may be performed directly without using a network device. The communication link between UEs is called a sidelink, and one typical application scenario for sidelink communication is the internet of vehicles (Vehicle to Everything, V2X). In the internet of vehicles, each vehicle is one UE, and data transmission can be directly carried out between the UE and the UE through a side uplink without passing through a network, so that communication time delay can be effectively reduced.

Logical Channel (LC): the medium access control layer (Media Access Control, MAC) of the New Radio (NR) provides services to the Radio link control layer (Radio Link Control, RLC) in the form of logical channels. The logical channels are defined by the type of information they carry and are typically distinguished as control channels for transmitting control and configuration information or as traffic channels for transmitting user data.

Channel access priority (Channel Access Priority Classes, cap): during LBT detection, the size of the contention window (contention window, CW) is determined from the cap. Typically, transmissions with higher caps (i.e., lower cap values) may use smaller contention windows to obtain earlier channel access opportunities. The third generation partnership project (The 3rd Generation Partnership Project,3 GPP) defines four classes of CAPCs.

New wireless unlicensed spectrum (NR-U): the licensed spectrum is a basic stone of wireless mobile service, can meet the service requirements of coverage, spectrum efficiency and reliability, but the unlicensed spectrum (such as a unlicensed band 5G technology, a spectrum which can be used without being licensed by a regulatory agency under the condition of meeting regulatory rules) can be used as a supplement of the licensed spectrum by improving the capacity and improving the data connectivity under certain conditions, plays an important role in the vertical industry, and brings great value to 3GPP operators.

The technical scheme provided by the embodiment of the application can be applied to various communication systems, such as a satellite communication system and a system integrating satellite communication with a cellular network. Among other things, cellular network systems may include, but are not limited to: fifth generation (5th generation,5G) systems, global system for mobile communications (Global System of Mobile communication, GSM) systems, code division multiple access (Code Division Multiple Access, CDMA) systems, wideband code division multiple access (Wideband Code Division Multiple Access, WCDMA) systems, general packet Radio service (General Packet Radio Service, GPRS), long term evolution (Long Term Evolution, LTE) systems, LTE frequency division duplex (Frequency Division Duplex, FDD) systems, LTE time division duplex (Time Division Duplex, TDD) systems, advanced long term evolution (Advanced long term evolution, LTE-a) systems, new air interface (New Radio, NR) systems, evolution systems of NR systems, LTE (LTEbased access to unlicensed spectrum, LTE-U) systems on unlicensed bands, NR (NR-based access to unlicensed spectrum, NR-U) systems on unlicensed bands, universal mobile communication systems (Universal Mobile Telecommunication System, UMTS), worldwide interoperability for microwave access (Worldwide Interoperability for Microwave Access, wiMAX) communication systems, wireless local area networks (Wireless Local Area Networks, WLAN), wireless fidelity (Wireless Fidelity, wiFi), next-generation communication systems or other communication systems, and the like. In general, the number of connections supported by the conventional communication system is limited and is easy to implement, however, with the development of communication technology, the mobile communication system will support not only conventional communication but also, for example: other new systems, such as Device-to-Device (D2D) communications, machine-to-machine (Machine to Machine, M2M) communications, machine type communications (Machine Type Communication, MTC), inter-vehicle (Vehicle to Vehicle, V2V) communications, and other communications systems evolving in the future, may also be applied to these communications systems. Satellite communication systems may include various non-terrestrial network systems, such as networks for radio frequency transmissions by satellite or unmanned aerial vehicle system (unmanned aircraft system, UAS) platforms and the like, which are not listed here.

For example, referring to fig. 1, fig. 1 is a schematic diagram of a communication system according to an embodiment of the present application.

As shown in fig. 1, the communication system 100 mainly includes an access network, user Equipments (UEs) 101 and 102, and a server 104. The access network is configured to implement functions related to wireless access, and mainly includes Access Network (AN) devices, where the AN devices include wireless access network (radio access network, RAN) devices (such as a base station 103) and other devices that access through AN air interface (such as WiFi). The interfaces between the network elements are shown in fig. 1. It should be appreciated that the network elements may also communicate using a serviced interface.

A UE may also be referred to as a terminal device. The terminal device may communicate with one or more Core Networks (CNs) via AN device. Terminal devices involved in embodiments of the present application include, but are not limited to, connections via wireline, such as via public-switched telephone network (Public Switched Telephone Networks, PSTN), digital subscriber line (Digital Subscriber Line, DSL), digital cable, direct cable connection; and/or another data connection network; and/or via a wireless interface, such as: a digital television network such as a digital television broadcast-Handheld (Digital Video Broadcast-handleld, DVB-H) network, a satellite network, an amplitude modulation-frequency modulation (Amplitude Modulation-Frequency Modulation, AM-FM) broadcast transmitter for a cellular network, a wireless local area network (Wireless Local Area Network, WLAN); and/or means of the other terminal device arranged to receive/transmit communication signals; and/or internet of things (Internet of Things, ioT) devices. Terminal devices arranged to communicate over a wireless interface may be referred to as "wireless communication terminals", "wireless terminals" or "mobile terminals". Examples of such terminal devices include, but are not limited to, satellite phones or cellular phones; a personal communications system (Personal Communications System, PCS) terminal that may combine a cellular radiotelephone with data processing, facsimile and data communications capabilities; a personal digital assistant (personal digital assistant, PDA) that may include a radiotelephone, pager, internet/intranet access, web browser, organizer, calendar and/or a global positioning system (Global Positioning System, GPS) receiver; and conventional laptop and/or palmtop receivers or other electronic devices that include a radiotelephone transceiver. A terminal device can also be called a User Equipment (UE), an access terminal, a subscriber unit, a subscriber station, a mobile station, a remote terminal, a mobile device, a user terminal, a wireless communication device, a user agent, or a user equipment. The terminal device may also be a cellular phone, a cordless phone, a session initiation protocol (session initiation protocol, SIP) phone, a wireless local loop (wireless local loop, WLL) station, a personal digital assistant (personal digital assistant, PDA), a handheld device with wireless communication capabilities, a computing device or other processing device connected to a wireless modem, a vehicle-mounted device, a wearable device, a terminal device in the internet of things or in the internet of vehicles, a terminal device in a 5G network, a terminal device in a future evolved public land mobile network (public land mobile network, PLMN), a terminal device of any form in a future network, etc.

AN apparatus, which is AN apparatus for accessing a terminal apparatus to a wireless network, may be a base station. The base station may include various forms of base stations, such as: macro base stations, micro base stations (also referred to as small stations), relay stations, access points, and the like. The method specifically comprises the following steps: an Access Point (AP) in a wireless local area network (wireless local area network, WLAN), a base station (base transceiver station, BTS) in a global system for mobile communications (global system for mobile communications, GSM) or code division multiple access (code division multiple access, CDMA), a base station (NodeB, NB) in wideband code division multiple access (wideband code division multiple access, WCDMA), an Evolved Node B (eNB or eNodeB) in LTE, a relay station or an access point, or a vehicle-mounted device, a wearable device, a next generation Node B (the next generation Node B, gNB) in a 5G system, or a base station in a future Evolved public land mobile network (public land mobile network, PLMN) network, and the like, which are not particularly limited in the embodiments of the present application.

It should be understood that, in fig. 1, the terminal devices 101 and 102 may be connected to the same base station 103, or may be connected to different base stations, and fig. 1 is merely illustrative of an exemplary communication system, and should not be limited to the system configuration that may be applied to the embodiments of the present application.

It should be understood that embodiments of the present application are not limited to application in the communication system architecture shown in fig. 1. For example, more or fewer network elements or devices may be included in a communication system to which the communication method of the embodiments of the present application may be applied. The device or network element in fig. 1 may be hardware, or may be functionally divided software, or a combination of both. The devices or network elements in fig. 1 may communicate with each other via other devices or network elements.

By way of example, the communication system 100 described above may be applied to the field of internet of vehicles (V2X). In the internet of vehicles, each vehicle is one UE, i.e. UE1 denotes vehicle 1 and UE2 denotes vehicle 2. In the V2X communication architecture, two communication interfaces are included, namely a PC5 interface and a Uu interface.

The V2X PC5 interface is an interface for direct communication between V2X UEs, and a direct communication link between V2X UEs is also defined as a sidelink or a sidelink. Data transmission between the UE1 (i.e. the vehicle 1) and the UE2 (i.e. the vehicle 2) can be directly performed through the side uplink, and no network is needed, so that the communication delay can be effectively reduced.

The V2X Uu interface communication is a communication mode in which the V2X UE1 (i.e., vehicle 1) sends V2X data to the base station through the Uu interface, and the base station sends the V2X data to the V2X application server for processing, and then the V2X application server sends the V2X data to the base station, and the base station sends the V2X data to the V2X UE2 (i.e., vehicle 2) of the receiving party. In the V2X Uu interface communication mode, the base station forwarding the uplink data from the UE1 to the server and the base station forwarding the downlink data sent from the server to the UE2 at the receiving side may be the same base station or may be different base stations, and may specifically be determined by the application server.

There are two ways in which the UE acquires the side uplink resources, referred to as mode1 (mode 1) and mode2 (mode 2), respectively.

When operating in mode1, the UE acquires SL resources from the base station side. Specifically, the base station may schedule SL resources to the UE through downlink control information (Downlink Control Information, DCI), or configure SL configuration grant (configured grant) to the UE through RRC message.

When operating in mode2, the UE may receive the SL resource pool configuration from the base station side, or obtain the SL resource pool configuration from the pre-configuration, and then select SL resources from the SL resource pool to transmit. Specifically, the SL resource selection may be selected randomly, or may be selected based on the result of listening (sensing) or partial listening.

Accordingly, NR V2X supports two resource allocation schemes, mode1 and mode 2.

In mode1, the base station schedules SL resources for SL transmission to the UE.

In mode2, the UE autonomously determines SL resources configured by the base station/network. NR V2X supports resource awareness and resource selection procedures under mode2, which may be based on demodulating SCI information or other SL measurements of other UEs. The demodulation SCI information should at least reflect the usage of the resources on the SL, and other SL measurements may be based on the reference signal received power (reference signal received power, RSRP) measurements corresponding to the SL of the physical Layer1 (Layer 1, L1) of the SL DMRS. The resource selection procedure may decide on resources for SL transmission based on the above-described perceived procedure results.

Specific resource sensing and resource selection processes can refer to fig. 2, and fig. 2 is a schematic flow chart of resource selection according to an embodiment of the present application.

As shown in fig. 2, at time (slot) n, data to be transmitted is buffered in a logical channel, and at this time, the UE triggers a resource selection procedure under mode2, which specifically includes the following steps:

step 1: determining a resource selection window [ n+T ] ₁ ,n+T ₂ ]Wherein 0.ltoreq.T ₁ ≤T _(proc,1)^SL ， (packet delay budget，PDB)。

Step 2: determining a listening window [ n-T ] ₀ ,n-T _(proc,0)^SL ]。

Step 3: a threshold value for RSRP is determined.

Step 4: the set of available resources s_a is initialized, including all time-frequency resources in the resource selection window.

Step 5: the following time-frequency resources are excluded from the set of available resources s_a: and the time slots of all periodic resource reservation of the resource pool configuration corresponding to the time slots (transmitted time slots) which are not detected in the detection window.

Step 6: if the remaining time-frequency resources in s_a are less than X% of the total resources of the resource selection window, the initialization available resource set s_a in step 4 is selected.

Step 7: continuing to exclude the following time-frequency resources from the initialized available resource set s_a: the received first-stage SCI is successfully decoded, the result of RSRP measurement performed by PSSCH DMRS of the time-frequency resources reserved by the received first-stage SCI is higher than the RSRP threshold value determined in the step 3, and the time-frequency resources reserved by the received first-stage SCI are in the time-frequency resources in the resource selection window.

Step 8: if the remaining time-frequency resources in s_a are less than X% of the total resources of the resource selection window, the value of X% may be configured by the resource pool, and the RSRP threshold value determined in step 3 is raised (for example, each time 3 is raised) until the condition that the remaining time-frequency resources in s_a are not less than X% of the total resources of the resource selection window is satisfied.

After the above resource selection process is completed, the physical layer (PHY) reports s_a to the MAC layer, and the MAC layer randomly selects N time-frequency resources in s_a for transmitting data.

At this time, the MAC layer receives data in the logical channel according to the selected time-frequency resource and packs the data to obtain transport blocks (transmission block, TB), and prepares the transport blocks for being delivered to the physical layer.

Specifically, the MAC layer packet obtains a TB, which may be multiplexing several Service Data Units (SDUs) or Control Elements (CEs) of the MAC layer into a protocol data unit (protocol data unit, PDU) (i.e. transport block), and then selecting a CAPC for Uplink (UL) grant. The RLC layer completes the functions of size matching and the like of the data packet; the MAC layer performs functions such as data scheduling and mapping between logical channels and transport channels.

There is only one MAC PDU but there are a plurality of logical channels to be multiplexed, which requires a priority to be assigned to each logical channel. The data of the highest priority logical channel is preferentially included in the MAC PDU, followed by the data of the next highest priority logical channel, and so on, until the assigned MAC PDU is full or no more data is to be transmitted. The priority of each logical channel is determined by the priority field of the logical channel configuration information, and the smaller the value, the higher the priority.

Under SL transmission, the logical channel priority of the side downlink control channel (Sidelink Control Channel, SCCH) is higher than the logical channel priority of the MAC CE, which is higher than the logical channel priority of the side downlink traffic channel (Sidelink Traffic Channel, STCH).

In addition, after the MAC layer packet gets the TB, the terminal and the network device need to perform an LBT procedure before transmitting data in order to use unlicensed spectrum fairly. Two results can be obtained when performing the LBT procedure: channel access procedure is complete (also referred to as LBT success) and channel access procedure is incomplete (also referred to as LBT failure). The UE may use the LBT mechanism to detect the channel continuously for a period of time. When the UE finds that the channel value is occupied for a prescribed period of time, it will send LBT failure.

Referring to fig. 3, fig. 3 is a schematic flow chart of LBT detection according to an embodiment of the present application.

As shown in fig. 3, in NR-U, the LBT detection process can be divided into two phases, the first phase is to perform energy detection (N-Backoff) based on a Backoff mechanism, and the second phase is to perform a sensing channel of a sensing slot. When both phase detections are idle, data may be sent out.

In the first stage, for a certain bandwidth, defining a window, wherein the window defines the range of the number of detected time slots, the communication equipment randomly selects a value A from the window (or the value range), and after the communication equipment detects at least A idle energy detection time slots, the communication equipment considers that a channel is idle, so that the communication equipment can use the idle channel to transmit data; otherwise, the channel is considered busy, so that the communication device does not use the busy channel to transmit data. The idle energy detection means that the energy of the received signal in a fixed time period is smaller than or equal to a preset threshold. When the first stage of LBT completes detection and judges that the channel is idle, it is necessary to wait for transmission of data if the data is not ready for transmission yet. Before data transmission, the second stage of detection is performed, that is, the physical layer needs to additionally detect a sending slot of the channel, and if the physical layer is idle at this time, the physical layer directly sends data to the air interface.

Referring to fig. 4, fig. 4 is a schematic diagram of an LBT detection flow according to an embodiment of the present application.

As shown in fig. 4, the first phase of LBT detection is triggered when the logical channel buffers the data that needs to be transmitted. An arbitrary back-off parameter N is generated, the value of N being between 0 and a threshold CW, which is determined by CAPC. Judging whether N is larger than 0; if N is not more than 0, sensing the channel in one T_d, and if the sensing channel is not idle, continuing to sense the channel in one T_d until the sensing channel is idle. After the channel sensing flow is finished, the value of N is correspondingly reduced by one, and the channel sensing in the next T_d is continuously executed until the sensing channel is idle. After the sensing channel is idle, judging whether N is equal to 0, if N is not equal to 0, continuing to correspondingly decrease the value of N by one, and continuing to execute channel sensing in the next T_d until N is equal to 0, and at the moment, transmitting data through idle resources of the sensing channel.

If there is no free channel, the transmitter will wait for the contention window to perform LBT again. The size of the conditional window may be adjusted based on the CAPC. Typically, transmissions with higher caps may use shorter conditional windows to obtain more channel opportunities. The cap is associated with a quality of service class identifier (QoS class identifier, QCI) identifying the quality of service class of the traffic to be transmitted.

The UE may receive a configured grant from the base station for uplink transmission on a plurality of logical channels of the data connection. Wherein each logical channel is assigned a cap. The UE may form TBs for uplink transmission by multiplexing data on multiple logical channels, wherein the multiplexing of logical channels may apply a cap-based restriction rule. The UE may perform an LBT procedure using a set of LBT parameters associated with a cap value, where the cap value may be determined based on the multiplexed logical channel.

The Radio Bearers (Radio beacons) and the CAPCs of the MAC CEs are fixed or configurable. The larger the CAPC value, the lower the priority. For the buffer status report (Buffer Status Report, BSR) and the recommended bit rate MAC CE, its cap priority is fixed to be the lowest (value takes 4). For signaling radio bearers (Signaling Radio Bearer, SRB) 0/1/3 and other MAC CEs, their CAPC priority is fixed to the highest (value 1). For SRB2 and data radio bearers (Data Radio Bearer, DRB), its cap value is configured by the base station. Considering the 5G QoS indicator (5G QoS identifier,5QI) value of quality of service (Quality of Service, qoS) flows in DRBs, the 3GPP protocol maps the 5QI value with the cap value, i.e. determines its cap value from the 5QI value in the DRBs data. The following table shows:

CAPC	5QI
		1	1,3,5,65,66,67,69,70,79,80,82,83,84,85
2	2,7,71
		3	4,6,8,9,72,73,74,76
4	/

When the MAC layer of the UE assembles a transport block and performs an LBT detection procedure for the transmission of the transport block, if the cap value transmitted by the uplink transport block is not given by DCI, a cap value needs to be specified for the transport block, and the LBT procedure is performed according to the cap value. The principles for determining the cap value are as follows:

when there are only MAC CEs in the transport block, the highest priority cap values of these MAC CEs will be the cap values of the transport block;

when the transport block contains SDUs of the common control channel (Common Control Channel, CCCH), the transport block uses the highest priority cap value;

when the transport block contains more SDUs than dedicated control channels (Dedicated Control Channel, DCCH), the transport block uses the highest priority cap value of these DCCHs;

in other cases, the transport block uses the CAPC value of the lowest priority among the MAC SDUs generated by the logical channel.

In the V2X Uu interface communication described above, the UE is in mode1 and the LBT procedure is implemented for scheduled or configured radio resources. When the base station schedules uplink resources for the UE and determines the corresponding cap, the UE may perform LBT on the channel according to the indicated cap. If the base station configures the wireless resource for the UE in advance, the UE packs according to the given link resource and carries out LBT according to the CAPC corresponding to the assembled transmission block.

Unlike V2X Uu interface communication, under SLmode2, transmission resources are determined by the UE through a sensing/selecting process, and the MAC layer of the UE packs data according to given resources. Thus, the resource determination under mode2 is random. Because the terminal equipment has randomness by sensing or selecting the determined wireless resources, the terminal equipment needs to complete the packet to obtain the transmission block, and then performs LBT according to the CAPC corresponding to the transmission block. This results in a late LBT time, which makes the efficiency of the terminal device to access to the channel in the unlicensed spectrum lower, and thus results in a lower communication efficiency, which is manifested in a practical scenario as various communication delays.

Aiming at the technical problem that the communication efficiency is low due to low efficiency of accessing a channel under an unlicensed spectrum of the terminal equipment, the application provides a communication method and a related device, which are used for advancing the time for executing LBT, reducing the time for waiting for completing the generation of a transmission block of a packet, executing LBT on the packet according to a CAPC corresponding to a logic channel with cached data, generating the transmission block of the packet, and transmitting the transmission block through idle resources detected by the LBT, thereby improving the efficiency of accessing the channel under the unlicensed spectrum, and improving the communication efficiency.

Referring to fig. 5, fig. 5 is a flow chart of a communication method according to an embodiment of the present application, where the communication method is applied to the field of communication technology.

As shown in fig. 5, a communication system to which the communication method according to the embodiment of the present application is applied includes, but is not limited to, a first terminal device (UE 1), a second terminal device (UE 2).

As shown in fig. 5, the communication method according to the embodiment of the present application may include steps S501, S502, S503 and S504, wherein the execution sequence of steps S501, S502, S503 and S504 is not limited thereto, and specifically, the communication method includes, but is not limited to, the following steps:

step S501: and the UE1 executes the first LBT according to the first CAPC corresponding to the first logical channel.

The first logical channel is a logical channel in which the buffered data exists, and optionally, the first logical channel may also be a logical channel in which the buffered data exists first. The logic channel with data buffer in the embodiment of the present application may be understood as a logic channel with data, or a logic channel with data to be transmitted, or a logic channel with valid data, which is not limited in the embodiment of the present application.

The UE1 in the embodiment of the present application is a device on which a processor that can be used to execute instructions executed by a computer is mounted, where the UE1 may be, for example, a mobile phone, a computer, a vehicle, a wearable device, and specifically may be the terminal device 101 in fig. 1, and is configured to send data to the terminal device 102. Similarly, the UE2 in the embodiment of the present application is a device on which a processor for executing instructions executed by a computer is mounted, where the UE2 may be, for example, a mobile phone, a computer, a vehicle, a wearable device, or the like, and specifically may be the terminal device 102 in fig. 1, and is configured to receive data sent by the terminal device 101.

Step S502: UE1 generates a first transport block.

In a possible embodiment, the UE1 generates the first transport block for the data group packet in the logical channel based on the group packet principle that the caps corresponding to the generated transport blocks are not lower than the first caps. And the CAPC corresponding to the first transmission block obtained at the moment is not lower than the first CAPC.

According to the embodiment of the application, the first transmission block is generated for the data packet based on the packet grouping principle that the CAPC corresponding to the first transmission block is not lower than the first CAPC, so that the idle resource detected by the first LBT can be transmitted after the first transmission block is generated by the packet, the time for waiting for executing the LBT is reduced, the channel access efficiency under the unlicensed spectrum is improved, and the communication efficiency is improved.

Optionally, the foregoing generating the first transport block for the data packet in the logical channel may be implemented as follows:

step (5-1): a first communication connection is determined.

Specifically, the first communication connection may be determined in a number of ways, including, by way of example and not limitation, the following:

mode one: a communication connection including a logical channel of at least one cap not lower than the first cap is determined as a first communication connection, i.e. the determined first communication connection is required to satisfy the logical channel including at least one cap not lower than the first cap. The first communication connection herein refers to a communication connection determined by the destination MAC ID, and includes a communication connection by unicast/multicast/broadcast or the like.

Because the first communication connection comprises at least one logic channel which is not lower than the first CAPC, when data in one or more logic channels which are included in the first communication connection are packed, the generated first transmission block needs to meet the packing principle that the CAPC is not lower than the first CAPC, and the first transmission block can be sent through idle resources detected by the first LBT after being generated, so that the time for waiting for executing the LBT is reduced, the efficiency of accessing the channels under an unlicensed spectrum is improved, and the communication efficiency is improved.

Mode two: the communication connection comprising the first logical channel may be determined as a first communication connection, i.e. the determined first communication connection is required to meet the conditions comprising the first logical channel.

Because the first communication connection comprises the first logic channel, the CAPC corresponding to the first logic channel is the CAPC corresponding to the execution of the first LBT, so that the data in the first logic channel can be packetized to generate the first transmission block, and the first transmission block can be transmitted through the idle resource detected by the first LBT after being generated according to the generated first transmission block meeting the packet-packetizing principle that the CAPC is not lower than the first CAPC, thereby reducing the time for waiting for executing the LBT, improving the efficiency of accessing the channel under the unlicensed spectrum and improving the communication efficiency.

Mode three: for each communication connection, the communication connection including the second logic channel may be determined as the first communication connection, where the second logic channel is a logic channel with higher logic channel priority that meets the condition that CACP is not lower than that of the first cape, where the second logic channel corresponds to the second logic channel and is not lower than that of the first cape, and the second logic channel is a logic channel with higher logic channel priority, which may be the logic channel with the highest logic channel priority, or may be the logic channel with the first bits of logic channel priority ordering.

Because the first communication connection comprises the second logic channel, the data in the second logic channel can be packetized to generate the first transmission block, the generated first transmission block meets the packetizing principle that the CAPC is not lower than the first CAPC, and the first transmission block can be transmitted through idle resources detected by the first LBT after being generated, so that the time for waiting for executing the LBT is reduced, the channel access efficiency under the unlicensed spectrum is improved, and the communication efficiency is improved.

It will be appreciated that the first communication connection may also be determined by priority information corresponding to other logical channels in the technical evolution, and the CAPC in the above three manners is merely illustrated as exemplary priority information, and should not be construed as limiting the present application.

Step (5-2): and allocating resources to one or more logical channels included in the first communication connection according to the CAPC and/or the logical channel priorities.

Specifically, for a plurality of different logical channels, the priority of the logical channels should be different according to the importance of the information, and in the priority of the logical channels, the SCCH is higher than the MAC CE, and the MAC CE is higher than the STCH. Different manners of resource allocation can be performed on one or more logical channels included in the first communication connection according to the caps information corresponding to the SCCHs and the caps information corresponding to the MAC CEs, that is, in the case of different caps information corresponding to the SCCHs and different caps information corresponding to the MAC CEs, different manners are adopted to perform resource allocation on one or more logical channels included in the first communication connection according to the caps and/or the priorities of the logical channels.

Exemplary, include, but are not limited to, the following resource allocation schemes:

case one: the SCCH has no fixed CAPCs and the MAC CE has no fixed CAPCs.

Mode one: and according to the first information and the second information, sequentially allocating resources to one or more logic channels in the first communication connection according to the logic channel priority order and the CAPC order. The first information comprises SCCH information and CAPC information corresponding to the SCCH in the first communication connection, and the second information comprises MAC CE information and CAPC information corresponding to the MAC CE in the first communication connection.

For example, in the case that the logical channel in the first communication connection satisfies the first condition, performing resource allocation for the SCCH higher than the CAPC; and sequentially distributing the resources of the rest SCCH, the MAC CE and the STCH according to the order of the logic channel priority from high to low. The first condition includes that the SCCH exists in the first communication connection and the CAPC corresponding to the existing SCCH is not lower than the first CAPC.

For another example, when the logical channel in the first communication connection does not satisfy the first condition and satisfies the second condition, the resource allocation is performed for the MAC CE having the higher cap; and sequentially distributing the resources of the rest MAC CEs and the STCHs according to the order of the logic channel priority from high to low. The second condition includes that the MAC CE exists in the first communication connection and the CAPC corresponding to the MAC CE is not lower than the first CAPC.

For another example, when the logical channel in the first communication connection does not satisfy the first condition and does not satisfy the second condition, the STCH and the MAC CE of the cap not lower than the first cap are sequentially allocated with resources in order of higher priority of the logical channel.

In the first manner, when the SCCH has no fixed cap and the MAC CE has no fixed cap, the resource allocation is performed on one or more logical channels included in the first communication connection, so that data in the logical channels respectively allocated to the resources can be selectively packetized, and a first transport block according with the packetizing principle is generated.

And a second case: the SCCH has a fixed highest level cap value and the MAC CE has no fixed cap value.

Mode two: and according to the third information and the fourth information, sequentially allocating resources to one or more logic channels in the first communication connection according to the logic channel priority order and the CAPC order. The third information includes SCCH information in the first communication connection, and the fourth information includes MAC CE information in the first communication connection and CAPC information corresponding to the MAC CE.

For example, when the logical channel in the first communication connection satisfies the third condition, the SCCH, the MAC CE, and the STCH are sequentially allocated with resources in order of higher priority of the logical channel. Wherein the third condition comprises the presence of an SCCH in the first communication connection.

For another example, when the logical channel in the first communication connection does not satisfy the third condition and satisfies the fourth condition, the resource allocation is performed for the MAC CE having the higher cap; and sequentially carrying out resource allocation on the rest MAC CEs and the STCH of which the CAPCs are not lower than the first CAPC according to the order of the logic channel priority from high to low. The fourth condition includes that a MAC CE exists in the first communication connection and a cap corresponding to the existence of the MAC CE is not lower than the first cap.

For another example, when the logical channel in the first communication connection does not satisfy the third condition and does not satisfy the fourth condition, the STCH and the MAC CE having the cape not lower than the first cape are sequentially allocated with resources in the order of the logical channel priority from high to low.

In the second mode, when the SCCH has a fixed highest-level cap value and the MAC CE has no fixed cap value, the resource allocation is performed on one or more logical channels included in the first communication connection, so that data in the logical channels respectively allocated to the resources can be selectively packetized, and a first transport block according with the packetizing principle is generated.

And a third case: the SCCH has no fixed highest level cap value and the MAC CE has a fixed highest level cap value.

Mode three: and according to the fifth information and the sixth information, sequentially allocating resources to one or more logic channels in the first communication connection according to the logic channel priority order and the CAPC order. The fifth information includes SCCH information in the first communication connection and CAPC information corresponding to the SCCH, and the sixth information includes MAC CE information in the first communication connection.

For example, in the case that the logical channel in the first communication connection satisfies the fifth condition, performing resource allocation for the SCCH higher than the CAPC; and sequentially distributing the resources of the rest SCCH, the MAC CE and the STCH according to the order of the logic channel priority from high to low. Wherein, the fifth condition includes that the SCCH exists in the first communication connection and the CAPC corresponding to the existence of the SCCH is not lower than the first CAPC.

For another example, when the logical channel in the first communication connection does not satisfy the fifth condition and satisfies the sixth condition, the resources are allocated to the STCH of the MAC CE and the cap not lower than the first cap in order of the logical channel priority from high to low. Wherein the sixth condition includes the presence of a MAC CE in the first communication connection.

For another example, when the logical channel in the first target communication connection does not satisfy the fifth condition and does not satisfy the sixth condition, the STCH of the cape not lower than the first cape is allocated with resources in the order of the logical channel priority from high to low.

In the third mode, when the SCCH has no fixed highest-level cap value and the MAC CE has a fixed highest-level cap value, the resource allocation is performed on one or more logical channels included in the first communication connection, so that data in the logical channels respectively allocated to the resources can be selectively packetized, and a first transport block according with the packetizing principle is generated.

Case four: the SCCH has a fixed highest level cap value and the MAC CE also has a fixed highest level cap value.

Mode four: and according to the seventh information and the eighth information, sequentially allocating resources to one or more logic channels in the first communication connection according to the logic channel priority order and the CAPC order. Wherein the seventh information includes SCCH information in the first communication connection and the eighth information includes MAC CE information in the first communication connection.

For example, when the logical channel in the first communication connection satisfies the seventh condition, the SCCH, the MAC CE, and the STCH are sequentially allocated with resources in order of higher priority of the logical channel. Wherein the seventh condition includes the presence of an SCCH in the first communication connection.

For another example, when the logical channel in the first communication connection does not satisfy the seventh condition and satisfies the eighth condition, the resources are allocated to the STCH of the MAC CE and the cap not lower than the first cap in the order of the logical channel priority from high to low. Wherein the eighth condition includes the presence of a MAC CE in the first communication connection.

For another example, when the logical channel in the first communication connection does not satisfy the seventh condition and does not satisfy the eighth condition, the STCH of the cap is allocated with resources not lower than the STCH of the first cap in the order of the logical channel priority from high to low.

In the fourth mode, when the SCCH has a fixed highest-level cap value and the MAC CE also has a fixed highest-level cap value, the resource allocation is performed on one or more logical channels included in the first communication connection, so that data in the logical channels respectively allocated to the resources can be selectively packetized, and a first transport block according with the packetizing principle is generated.

It will be appreciated that the resource allocation may also be performed differently for one or more other types of logical channels included in the first communication connection, and that the SCCH, MAC CE, STCH in the four manners described above are merely exemplary logical channels and should not be construed as limiting the application.

Step (5-3): and according to the resources corresponding to one or more logic channels in the first communication connection, grouping the data in the one or more logic channels to generate a first transmission block.

Based on resource allocation to each logic channel in the first communication connection, data in the logic channels respectively allocated to the resources can be selectively packed, so that the generated first transmission block meets the packing principle that CAPC is not lower than that of the first CAPC, and the generated first transmission block can be sent through idle resources detected by the first LBT, thereby reducing the time for waiting for executing the LBT, improving the efficiency of accessing the channels under the unlicensed spectrum and improving the communication efficiency.

In another possible embodiment, UE1 generates a first transport block for a data group packet in a logical channel.

The implementation process of the first transport block generated for the data packet in the logical channel may be as follows:

Several SDUs or CEs of the MAC layer may be multiplexed into the PDU, a first transport block is generated, and then a cap corresponding to the first transport block is determined.

Step S503: and the UE1 determines to send the first transmission block through the idle resources detected by the first LBT or the idle resources detected by the second LBT according to the first CAPC and the CAPC corresponding to the first transmission block.

In one possible embodiment, after generating the first transport block for the data group packet, it is determined that the first transport block is transmitted through the idle resource detected by the first LBT, where the cap corresponding to the first transport block generated for the data group packet is required to be not lower than the first cap.

According to the embodiment of the application, the first transmission block is generated for the data packet based on the constraint condition that the CAPC corresponding to the first transmission block is not lower than the first CAPC, and the first transmission block is determined to be transmitted through the idle resource detected by the first LBT, so that the time for LBT is advanced, the time for waiting for completing the generation of the transmission block for the packet is reduced, the efficiency of LBT for the channel is improved, the idle resource detected by the first LBT after the first transmission block is generated for the packet is enabled to be transmitted, the time for waiting for executing the LBT is reduced, the efficiency of accessing the channel under an unlicensed spectrum is improved, and the communication efficiency is improved.

In another possible embodiment, after the first transport block is generated for the data packet, the cap corresponding to the first transport block is compared with the first cap, where the cap corresponding to the first transport block is not lower than the first cap, and the result indicating that the first transport block can multiplex the first LBT is sent, and the first transport block is determined to be sent through the idle resource detected by the first LBT according to the first parameter corresponding to the first LBT and the second parameter corresponding to the second LBT.

Specifically, the first parameter corresponding to the first LBT represents the remaining number of detection channels in the first LBT process, and the second parameter corresponding to the second LBT represents the number of detection channels configured by the second LBT. And when the remaining number of detection channels in the first LBT process is smaller than the number of detection channels configured by the second LBT, determining to transmit the first transport block through the idle resources detected by the first LBT.

According to the embodiment of the application, under the condition that the first transmission block is generated by normal grouping, the first transmission block is transmitted by multiplexing the result of the first LBT, so that the time for executing the LBT is advanced, the time for waiting for completing the grouping to generate the transmission block is reduced, the efficiency of LBT on a channel is improved, the idle resource detected by the first LBT after the grouping to generate the first transmission block can be transmitted, the time for waiting for executing the LBT is reduced, the efficiency of accessing the channel under an unlicensed spectrum is improved, and the communication efficiency is improved.

Further, in case that the cap corresponding to the first transport block is lower than the first cap, it is determined that the first transport block is transmitted through the idle resource detected by the LBT indicated by the first transport block.

And when the remaining times of the detection channels in the first LBT process are greater than or equal to the times of the detection channels in the second LBT process, determining that idle resources detected by the LBT indicated by the first transport blocks transmit the first transport blocks.

Step S504: UE1 sends a first transport block to UE2, and correspondingly, UE2 receives the first transport block sent by UE 1.

Compared with the conventional communication method that the transmission block is generated by firstly grouping packets and then executing LBT, and the transmission block is transmitted through idle resources detected by the LBT, the embodiment of the application advances the time for executing the LBT, reduces the time for waiting for the completion of grouping packets to generate the transmission block, but firstly executes the LBT according to the CAPC corresponding to the logic channel with the buffer data, then generates the transmission block for the data grouping packets, and transmits the transmission block through the idle resources detected by the LBT, thereby improving the efficiency of accessing the channel under the unlicensed spectrum, and improving the communication efficiency.

Referring to fig. 6, fig. 6 is a flowchart of another communication method according to an embodiment of the present application, or may be understood as a modification or addition to the flowchart of the communication method in fig. 5, and may be specifically understood as a supplementary explanation of the content of the method performed in steps 501 to 503 in fig. 5.

As shown in fig. 6, when the logical channel has buffered data, the UE triggers the LBT procedure according to the cap corresponding to the logical channel. And, when the transport block is assembled in the MAC layer, the selection of data in the logical channel is limited according to the CAPC. At this time, the UE may select to transmit a transport block according to the result of the LBT. The method comprises the following specific steps:

step 1: when there is buffer data in the logic channel in the UE MAC layer, the physical layer is issued with an LBT configuration parameter CAPC, which triggers the physical layer to perform the first stage of the LBT detection procedure according to the CAPC (energy detection based on the Backoff mechanism, N-Backoff).

Step 2: the physical layer performs the first stage of LBT detection process according to the configuration parameters, while the physical layer performs the resource sensing and resource selection process of mode 2.

Step 3: after the physical layer of the UE determines candidate resources, the candidate resource set is sent to the MAC layer, the MAC layer determines the sending resources from the candidate resource set, and the MAC layer starts to pack (i.e. transport blocks); the packet grouping principle is that the CAPC corresponding to the TB obtained by the packet grouping is not lower than the CAPC corresponding to the triggered LBT.

Step 4: when the first stage (N-Backoff) of the LBT detection procedure is finished, the physical layer needs to perform one transmission slot LBT detection on the determined transmission resource, i.e. perform the second stage of LBT detection.

Step 5: after the detection phase of the LBT twice, the channel on the resource is found to be in an idle state, and the physical layer sends out the transmission block from the MAC layer.

It should be noted that, in order to implement the packet grouping principle in the step 3, it is necessary to determine the first communication connection, and allocate resources to one or more logical channels included in the first communication connection according to the caps and/or the logical channel priorities, so that data in one or more logical channels may be grouped according to resources corresponding to one or more logical channels in the first communication connection, so as to generate the first transport block according to the packet grouping principle.

In addition, the first LBT detection, the resource sensing and the resource selection have no sequence of execution time, and may be performed simultaneously or not.

In determining the first communication connection, three ways may be adopted:

mode one: only the communication connection containing the logical channel triggering LBT is selected and determined as the first communication connection.

Mode two: the CAPC of the logical channel triggering the LBT is used as a reference, and the CAPC of the logical channel with the highest priority is not lower than the reference when selecting the communication connection.

Mode three: based on the CAPC of the logical channels triggering the LBT, when a communication connection is selected, the condition is increased that the CAPC of at least one logical channel of the communication connection is not lower than the reference.

The first communication connection determined in the above manner can enable the generated first transmission block to meet the packet grouping principle that the CAPC is not lower than the first CAPC when the data in one or more logic channels included in the first communication connection are grouped, and can be transmitted through the idle resources detected by the first LBT after the first transmission block is generated, so that the time for waiting for executing the LBT is reduced, the efficiency of accessing the channels under the unlicensed spectrum is improved, and the communication efficiency is improved.

In terms of resource allocation to one or more logical channels included in the first communication connection, resource allocation to one or more logical channels included in the first communication connection may be performed in different manners according to the caps information corresponding to the SCCHs and the caps information corresponding to the MAC CEs, that is, in the case of different caps information corresponding to the SCCHs and different caps information corresponding to the MAC CEs, resource allocation to one or more logical channels included in the first communication connection may be performed in different manners according to the priorities of the caps and/or the logical channels.

The resource allocation of one or more logical channels comprised in the first communication connection will be performed in the different ways that are taken in the different situations in connection with fig. 7 to 10.

Referring to fig. 7, fig. 7 is a schematic flow chart of a logic channel resource allocation according to an embodiment of the present application.

As shown in fig. 7, in order to allocate resources to one or more logical channels included in the first communication connection in case that the SCCH has no fixed cap and the MAC CE has no fixed cap.

Specifically, it is first determined whether an SCCH exists in the first communication connection and a cap corresponding to the SCCH exists is not lower than the first cap. If the judgment result is yes, the SCCH of the highest CAPC allocates resources first, and other SCCHs allocate resources in sequence according to the priority of the logic channel; the MAC CE sequentially allocates resources according to the priority of the logic channel; the STCH allocates resources sequentially according to the priority of the logical channels.

If the judgment result is negative, continuing to judge whether the MAC CE exists in the first communication connection and the CAPC corresponding to the MAC CE exists in the first communication connection and is not lower than the first CAPC. If the judgment result is yes, the MAC CE of the highest CAPC allocates resources first, and other MAC CEs allocate resources sequentially according to the priority of the logic channel; the STCH allocates resources sequentially according to the priority of the logical channels.

If the judgment result is negative, sequentially distributing resources according to the logic channel priority level by using the STCH of which all CAPCs are not lower than the STCH of the first CAPC; and all the MAC CEs sequentially allocate resources according to the priority of the logic channels.

By the embodiment of the application, under the condition that the SCCH has no fixed CAPC and the MAC CE has no fixed CAPC, the resource allocation is carried out on one or more logic channels included in the first communication connection, and the data in the logic channels respectively allocated to the resources can be selectively packetized to generate the first transmission block conforming to the packetizing principle.

Referring to fig. 8, fig. 8 is a schematic flow chart of a logic channel resource allocation according to an embodiment of the present application.

As shown in fig. 8, in order to allocate resources to one or more logical channels included in the first communication connection in case that the SCCH has a fixed highest level cap value and the MAC CE has no fixed cap value.

Specifically, it is first determined whether or not the SCCH exists in the first communication connection. If the judgment result is yes, the SCCH allocates resources in sequence according to the priority of the logic channel; the MAC CE sequentially allocates resources according to the priority of the logic channel; the STCH allocates resources sequentially according to the priority of the logical channels.

If the judgment result is negative, continuing to judge whether the MAC CE exists in the first communication connection and the CAPC corresponding to the MAC CE exists in the first communication connection and is not lower than the first CAPC. If the judgment result is yes, the MAC CE of the highest CAPC allocates resources first, and other MAC CEs allocate resources sequentially according to the priority of the logic channel; the STCH of the CAPC which is not lower than that of the first CAPC sequentially allocates resources according to the logic channel priority.

If the judgment result is negative, the CAPC is not lower than the STCH of the first CAPC, and resources are sequentially allocated according to the priority of the logic channel; the MAC CEs sequentially allocate resources according to the priority of the logic channels.

By the embodiment of the application, under the condition that the SCCH has the CAPC value of the fixed highest level and the MAC CE does not have the fixed CAPC value, the resource allocation is carried out on one or more logic channels included in the first communication connection, and the data in the logic channels respectively allocated to the resources can be selectively packetized to generate the first transmission block conforming to the packetizing principle.

Referring to fig. 9, fig. 9 is a schematic flow chart of a logic channel resource allocation according to an embodiment of the present application.

As shown in fig. 9, in order to allocate resources to one or more logical channels included in the first communication connection in the case where the SCCH has no fixed highest-level cap value and the MAC CE has a fixed highest-level cap value.

If the judgment result is negative, continuing to judge whether the MAC CE exists in the first communication connection. If the judgment result is yes, the MAC CE sequentially allocates resources according to the priority of the logic channel; the STCH of the CAPC which is not lower than that of the first CAPC sequentially allocates resources according to the logic channel priority.

If the result is negative, the CAPC is not lower than the STCH of the first CAPC, and the resources are allocated in sequence according to the priority of the logic channel.

By the embodiment of the application, under the condition that the SCCH has no CAPC value with the highest level and the MAC CE has the CAPC value with the highest level, the resource allocation is carried out on one or more logic channels included in the first communication connection, and the data in the logic channels respectively allocated to the resources can be selectively packed to generate the first transmission block conforming to the packing principle.

Referring to fig. 10, fig. 10 is a schematic flow chart of a logic channel resource allocation according to an embodiment of the present application.

As shown in fig. 10, in order to allocate resources to one or more logical channels included in the first communication connection in the case where the SCCH has a fixed highest-level cap value and the MAC CE also has a fixed highest-level cap value.

By the embodiment of the application, under the condition that the SCCH has the CAPC value of the fixed highest level and the MAC CE also has the CAPC value of the fixed highest level, the resource allocation is carried out on one or more logic channels included in the first communication connection, and the data in the logic channels respectively allocated to the resources can be selectively packed to generate the first transmission block conforming to the packing principle.

Referring to fig. 11, fig. 11 is a schematic flow chart of another communication method according to an embodiment of the present application, or may be understood as a modification or addition to the flowchart of the communication method in fig. 5 or fig. 6, specifically, may be understood as a supplementary explanation of the content of the method performed in steps 501 to 503 in fig. 5, or may be understood as a supplementary explanation of the content of another implementation method different from that in fig. 6.

As shown in fig. 11, the UE does not change the existing packetization procedure, but compares the packetized cap with the cap corresponding to the LBT that has been triggered to determine whether to multiplex the existing LBT detection result. The method comprises the following specific steps:

assuming that p_0 is a value of the cap corresponding to LBT0 (i.e., the first LBT detection) triggered by data transmission (data is buffered in the logical channel), n_0 is a backoff parameter of the corresponding LBT 0;

p_1 is the value of CAPC corresponding to LBT1 (i.e. second LBT detection) triggered when the MAC layer packets (when the MAC layer determines the transmission resource of the PHY), and N_1 is the rollback parameter of the corresponding LBT 1;

after the UE executes LBT0 according to the caps corresponding to the logical channels with the buffered data, when the UE completes the MAC packet and prepares to perform LBT1, it needs to consider whether to multiplex the current detection result of LBT0, and the comparison process is as follows:

(1) Comparing the priorities corresponding to the two LBTs:

if p_0< p_1, at this time, the priority of transmission LBT1 of the packet is lower, the detection result of LBT0 with high priority cannot be used, at this time, LBT1 still needs to be executed, and a transport block is sent through idle resources detected by LBT 1;

if P_0 is greater than or equal to P_1, the transmission LBT1 priority of the group packet is higher, and the detection result of LBT0 can be multiplexed.

(2) Comparing the priorities and the rollback parameters corresponding to the two LBT:

if P_0 is greater than or equal to P_1, the priority of transmission LBT1 of the packet is higher, and whether to multiplex the detection result of LBT0 when the current data trigger is further judged according to the following conditions:

(2-1) if the current n_0 (the current cyclic value corresponding to n_0) is smaller than n_1, directly multiplexing the detection result of the current LBT0, and transmitting a transport block through the idle resource detected by the LBT 0;

(2-2) if the current n_0 (the current cyclic value corresponding to n_0) is greater than or equal to n_1, terminating the LBT0 procedure while performing the LBT1 procedure, and transmitting a transport block through the idle resource detected by the LBT 1.

Compared with the conventional communication method that a transmission block is generated by firstly grouping packets and then performing LBT, and the transmission block is transmitted through idle resources detected by the LBT, the embodiment of the application firstly performs a first LBT according to the CAPC corresponding to a logic channel with cache data, and then compares the CAPC corresponding to the first LBT and the CAPC corresponding to a second LBT (the LBT triggered when the transmission block is obtained by grouping packets), if the CAPC corresponding to the second LBT is higher and the rollback parameter corresponding to the first LBT is smaller than the rollback parameter corresponding to the second LBT, the idle resources detected by the first LBT can be multiplexed to transmit the transmission block; if the CAPC corresponding to the first LBT is higher, a second LBT needs to be executed, and a transmission block is sent through idle resources detected by the second LBT; if the CAPC corresponding to the second LBT is higher and the back-off parameter corresponding to the first LBT is greater than or equal to the back-off parameter corresponding to the second LBT, the second LBT needs to be executed, and the transmission block is sent through the idle resource detected by the second LBT. According to the embodiment of the application, the time for executing the LBT is advanced, the time for waiting for completing the generation of the transmission block of the packet is reduced, the LBT is executed firstly according to the CAPC corresponding to the logic channel with the cache data, then the first transmission block is generated for the packet of the data, the first transmission block is sent through multiplexing the result of the first LBT, the time for waiting for executing the LBT is reduced, the efficiency of accessing the channel under the unlicensed spectrum is improved, and the communication efficiency is improved.

The method provided by the embodiment of the application is described in detail above with reference to fig. 5 to 11.

The following describes the device provided in the embodiment of the present application in detail with reference to fig. 12 to 14.

It will be appreciated that, in order to implement the functions in the above embodiments, the first terminal device and the second terminal device include corresponding hardware structures and/or software modules for performing the respective functions. Those of skill in the art will readily appreciate that the elements and method steps of the various examples described in connection with the embodiments disclosed herein may be implemented as hardware, software, or a combination of hardware and software. Whether a function is implemented as hardware, software, or computer software driven hardware depends upon the particular application and design constraints imposed on the solution.

Referring to fig. 12, fig. 12 is a schematic structural diagram of a communication device according to an embodiment of the present application, where the communication device 120 may include an LBT unit 1201, a generating unit 1202, and a determining unit 1203.

In one possible design, the individual cells are described as follows:

an LBT unit 1201, configured to execute a first listen before talk LBT according to a first channel access priority CAPC corresponding to a first logical channel, where the first logical channel is a logical channel in which buffered data exists;

A generating unit 1202 for generating a first transport block;

a determining unit 1203, configured to determine, according to the first cape and a cape corresponding to the first transport block, to send the first transport block through the idle resource detected by the first LBT or the idle resource detected by the second LBT.

In a possible implementation manner, the determining unit 1203 is specifically configured to determine that the first transport block is sent through the idle resource detected by the first LBT, where a cap corresponding to the first transport block is not lower than the first cap.

In one possible embodiment, the apparatus further comprises:

the determining unit 1203 is further configured to determine a first communication connection, where the first communication connection includes at least one logical channel that is not lower than the first CAPC;

and a packetizing unit 1204, configured to packetize data in one or more logical channels included in the first communication connection, so as to obtain the first transport block.

In one possible embodiment, the apparatus further comprises:

a resource allocation unit 1205, configured to allocate resources to one or more logical channels in the first communication connection according to the caps and/or the logical channel priorities;

the packetizing unit 1204 is specifically configured to packetize data in one or more logical channels according to resources corresponding to the one or more logical channels in the first communication connection.

In a possible implementation manner, the resource allocation unit 1205 is specifically configured to allocate resources to one or more logical channels in the first communication connection according to the first information and the second information; the first information includes side uplink control channel (SCCH) information and CAPC information corresponding to the SCCH in the first communication connection, and the second information includes media access control layer (MAC) control element (MAC CE) information and CAPC information corresponding to the MAC CE in the first communication connection.

In a possible implementation manner, the resource allocation unit 1205 is specifically configured to allocate resources to the SCCH higher than the cap when the first communication connection meets the first condition;

In a possible implementation manner, the resource allocation unit 1205 is specifically configured to allocate resources to a MAC CE with a higher cap when the first communication connection does not meet the first condition and meets a second condition;

In one possible implementation manner, the resource allocation unit 1205 is specifically configured to, when the first communication connection does not meet the first condition and does not meet the second condition, sequentially allocate resources to STCH and MAC CE that have a caps not lower than the first caps in order of logical channel priority from high to low.

In a possible implementation manner, the resource allocation unit 1205 is specifically configured to allocate resources to one or more logical channels in the first communication connection according to the third information and the fourth information; the third information includes SCCH information in the first communication connection, and the fourth information includes MAC CE information in the first communication connection and CAPC information corresponding to the MAC CE.

In a possible implementation manner, the resource allocation unit 1205 is specifically configured to sequentially allocate resources to the SCCH, the MAC CE, and the STCH according to the order of the logical channel priority from high to low when the first communication connection meets a third condition;

In a possible implementation manner, the resource allocation unit 1205 is specifically configured to allocate resources to a MAC CE with a higher CAPC if the first communication connection does not meet the third condition and meets a fourth condition;

In one possible implementation manner, the resource allocation unit 1205 is specifically configured to, when the first communication connection does not meet the third condition and does not meet the fourth condition, sequentially allocate resources to STCH and MAC CE that have a caps not lower than the first caps in order of logical channel priority from high to low.

In a possible implementation manner, the resource allocation unit 1205 is specifically configured to allocate resources to one or more logical channels in the first communication connection according to the fifth information and the sixth information; the fifth information includes SCCH information in the first communication connection and CAPC information corresponding to the SCCH, and the sixth information includes MAC CE information in the first communication connection.

In a possible implementation manner, the resource allocation unit 1205 is specifically configured to allocate resources to the SCCH higher than the cap when the first communication connection meets a fifth condition;

In a possible implementation manner, the resource allocation unit 1205 is specifically configured to, when the first communication connection does not meet the fifth condition and meets a sixth condition, sequentially allocate resources to the MAC CE and the cap from the STCH of the first cap, in order of higher priority of the logical channels;

In a possible implementation manner, the resource allocation unit 1205 is specifically configured to allocate resources to STCHs that are not lower than the first CAPC by a sequence from high to low of a logical channel priority when the first communication connection does not meet the fifth condition and does not meet the sixth condition.

In a possible implementation manner, the resource allocation unit 1205 is specifically configured to allocate resources to one or more logical channels in the first communication connection according to seventh information and eighth information; wherein the seventh information includes SCCH information in the first communication connection and the eighth information includes MAC CE information in the first communication connection.

In a possible implementation manner, the resource allocation unit 1205 is specifically configured to, when the first communication connection meets the seventh condition, sequentially allocate resources to the SCCH, the MAC CE, and the STCH according to a sequence of high-to-low logical channel priorities;

In a possible implementation manner, the resource allocation unit 1205 is specifically configured to, when the first communication connection does not meet the seventh condition and meets an eighth condition, sequentially allocate resources to the MAC CE and the cape from the STCH of the first cape to the STCH of the first cape in order of higher priority of the logical channels;

In one possible implementation manner, the resource allocation unit 1205 is specifically configured to allocate resources to STCHs that are not lower than the first CAPC by a sequence from high to low of a logical channel priority when the first communication connection does not meet the seventh condition and does not meet the eighth condition.

In a possible implementation manner, the determining unit 1203 is further configured to determine, when the cap corresponding to the first transport block is not lower than the first cap, to send the first transport block through the idle resource detected by the first LBT according to the first parameter corresponding to the first LBT and the second parameter corresponding to the second LBT; the first parameter characterizes the remaining times of the detection channel in the first LBT process, the second parameter characterizes the times of the detection channel configured by the second LBT, and the cap of the second LBT is the cap corresponding to the first transmission block.

In a possible implementation manner, the determining unit 1203 is specifically configured to determine that the first transport block is transmitted through the idle resource detected by the first LBT if the first parameter is smaller than the second parameter.

In a possible implementation manner, the determining unit 1203 is further configured to determine that the first transport block is sent through the idle resource detected by the second LBT, where a cap corresponding to the first transport block is lower than the first cap.

In a possible implementation manner, the determining unit 1203 is further configured to determine that the first transport block is transmitted through the idle resource detected by the second LBT if the first parameter is greater than or equal to the second parameter.

the processing unit is further configured to generate a first transport block;

a second processing unit for generating a first transport block;

In another possible design, the individual cells are described as follows:

a generating unit 1202, configured to generate a first transport block, where a cap corresponding to the first transport block is not lower than the first cap;

a determining unit 1203, configured to determine that the first transport block is transmitted through the idle resource detected by the first LBT.

In one possible embodiment, the apparatus further comprises:

In another possible design, the individual cells are described as follows:

a generating unit 1202 for generating a first transport block;

a determining unit 1203, configured to determine, when the cap corresponding to the first transport block is not lower than the first cap, to send the first transport block through the idle resource detected by the first LBT according to the first parameter corresponding to the first LBT and the second parameter corresponding to the second LBT; the first parameter characterizes the remaining times of the detection channel in the first LBT process, the second parameter characterizes the times of the detection channel configured by the second LBT, and the cap of the second LBT is the cap corresponding to the first transmission block.

In a possible implementation manner, the determining unit 1203 is further configured to determine that, in a case where the cap corresponding to the first transport block is lower than the first cap, the first transport block is sent through the idle resource detected by the second LBT, where the cap of the second LBT is the cap corresponding to the first transport block.

The processing unit is further configured to generate a first transport block;

a second processing unit for generating a first transport block;

According to the embodiment of the present application, each unit in the apparatus shown in fig. 12 may be separately or completely combined into one or several additional units, or some (some) units may be further split into a plurality of units with smaller functions to form the unit, which may achieve the same operation without affecting the implementation of the technical effects of the embodiment of the present application. The above units are divided based on logic functions, and in practical applications, the functions of one unit may be implemented by a plurality of units, or the functions of a plurality of units may be implemented by one unit. In other embodiments of the present application, the terminal-based device may also include other units, and in practical applications, these functions may also be implemented with assistance from other units, and may be implemented by cooperation of multiple units.

It should be noted that the implementation of each unit may also correspond to the corresponding description of the method embodiments shown in fig. 5 to 11.

In the communication device 120 illustrated in fig. 12, the time for performing LBT is advanced, so that the time for waiting for completion of packet generation of a transport block is reduced, but LBT is performed first according to the CAPC corresponding to the logical channel with the buffered data, and then the transport block is generated for the packet of the data, and the efficiency of performing LBT on the channel can be improved by transmitting the transport block through the idle resource detected by LBT, thereby improving the efficiency of accessing the channel under the unlicensed spectrum and improving the communication efficiency.

Referring to fig. 13, fig. 13 is a schematic structural diagram of a communication device according to an embodiment of the application.

It should be understood that the communication device 130 shown in fig. 13 is only an example, and the communication device according to the embodiment of the present application may further include other components, or include components similar to the functions of the respective components in fig. 13, or not necessarily include all the components in fig. 13.

The communication device 130 includes a communication interface 1301 and at least one processor 1302.

The communication apparatus 130 may correspond to any network element or device of the first terminal device and the second terminal device. The communication interface 1301 is configured to receive and send signals, and the at least one processor 1302 executes program instructions to cause the communication apparatus 130 to implement the respective flow of the method performed by the corresponding network element in the above-described method embodiment.

In one possible design, the communication device 130 may perform the following method:

generating a first transport block;

In another possible design, the communication device 130 may perform the following method:

generating a first transport block;

under the condition that the CAPC corresponding to the first transmission block is not lower than the first CAPC, determining to send the first transmission block through the idle resource detected by the first LBT according to a first parameter corresponding to the first LBT and a second parameter corresponding to the second LBT; wherein the first parameter characterizes the remaining number of detection channels in the first LBT process, and the second parameter characterizes the number of detection channels configured by the second LBT.

The specific details of the method performed by the communication device 130 can be seen in fig. 5 to 11, and are not repeated here.

In the communication device 130 illustrated in fig. 13, the time for performing LBT is advanced, so that the time for waiting for completion of generating a transport block from a packet is reduced, but LBT is performed first according to a CAPC corresponding to a logical channel in which buffered data exists, then a transport block is generated from a packet from a data packet, and the transport block is transmitted through idle resources detected by LBT, so that the efficiency of performing LBT on a channel can be improved, thereby improving the efficiency of accessing the channel under unlicensed spectrum, and improving the communication efficiency.

For the case where the communication device may be a chip or a chip system, reference may be made to the schematic structure of the chip shown in fig. 14.

As shown in fig. 14, chip 140 includes a processor 1401 and an interface 1402. Wherein the number of processors 1401 may be one or more, and the number of interfaces 1402 may be a plurality. It should be noted that, the functions corresponding to the processor 1401 and the interface 1402 may be implemented by a hardware design, a software design, or a combination of hardware and software, which is not limited herein.

Optionally, the chip 140 may further comprise a memory 1403, the memory 1403 being adapted to store necessary program instructions and data.

In the present application, the processor 1401 may be configured to invoke a program for implementing the communication method provided in one or more devices or network elements in the first terminal device or the second terminal device from the memory 1403, and execute instructions included in the program. The interface 1402 may be used to output the execution result of the processor 1401. In the present application, the interface 1402 may be used specifically to output various messages or information of the processor 1401.

The communication method provided in relation to one or more embodiments of the present application may refer to the foregoing embodiments shown in fig. 5 to 11, and will not be described herein.

The processor in embodiments of the application may be a central processing unit (Central Processing Unit, CPU), but may also be other general purpose processors, digital signal processors (digital signal processor, DSP), application specific integrated circuits (application specific integrated circuit, ASIC), off-the-shelf programmable gate arrays (field programmable gate array, FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, or the like. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.

The memory in the embodiment of the application is used for providing a memory space, and the memory space can store data such as an operating system, a computer program and the like. The memory includes, but is not limited to, random access memory (random access memory, RAM), read-only memory (ROM), erasable programmable read-only memory (erasable programmable read only memory, EPROM), or portable read-only memory (compact disc read-only memory, CD-ROM).

According to the method provided by the embodiment of the present application, the embodiment of the present application further provides a computer readable storage medium, where a computer program is stored, and when the computer program runs on one or more processors, the method shown in fig. 5 to 11 may be implemented.

According to a method provided by an embodiment of the present application, the present application also provides a computer program product, including: computer program which, when run on a computer, can implement the method shown in fig. 5 to 11 described above.

The embodiment of the present application further provides a system, which includes at least one communication device 120 or a communication device 130 or a chip 140 as described above, for performing the steps performed by the corresponding network element in any of the embodiments of fig. 5 to 11.

The embodiment of the application also provides a processing device, which comprises a processor and an interface; the processor is configured to perform the method of any of the method embodiments described above.

It should be understood that the processing means may be a chip. For example, the processing means may be a field programmable gate array (field programmable gate array, FPGA), a general purpose processor, a digital signal processor (digital signal processor, DSP), an application specific integrated circuit (application specific integrated circuit, ASIC), an off-the-shelf programmable gate array (field programmable gate array, FPGA) or other programmable logic device, discrete gate or transistor logic device, discrete hardware components, a system on chip (SoC), a central processor (central processor unit, CPU), a network processor (network processor, NP), a digital signal processing circuit (digital signal processor, DSP), a microcontroller (micro controller unit, MCU), a programmable controller (programmable logic device, PLD) or other integrated chip. The disclosed methods, steps, and logic blocks in the embodiments of the present application may be implemented or performed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of the method disclosed in connection with the embodiments of the present application may be embodied directly in the execution of a hardware decoding processor, or in the execution of a combination of hardware and software modules in a decoding processor. The software modules may be located in a random access memory, flash memory, read only memory, programmable read only memory, or electrically erasable programmable memory, registers, etc. as well known in the art. The storage medium is located in a memory, and the processor reads the information in the memory and, in combination with its hardware, performs the steps of the above method.

It will be appreciated that the memory in embodiments of the application may be volatile memory or nonvolatile memory, or may include both volatile and nonvolatile memory. The nonvolatile memory may be a read-only memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an electrically Erasable EPROM (EEPROM), or a flash memory. The volatile memory may be random access memory (random access memory, RAM) which acts as an external cache. By way of example, and not limitation, many forms of RAM are available, such as Static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDR SDRAM), enhanced SDRAM (ESDRAM), synchronous DRAM (SLDRAM), and direct memory bus RAM (DR RAM). It should be noted that the memory of the systems and methods described herein is intended to comprise, without being limited to, these and any other suitable types of memory.

In the above embodiments, it may be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented in software, may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer instructions are loaded and executed on a computer, the processes or functions described in accordance with embodiments of the present application are produced in whole or in part. The computer may be a general purpose computer, a special purpose computer, a computer network, or other programmable apparatus. The computer instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be transmitted from one website, computer, server, or data center to another website, computer, server, or data center by a wired (e.g., coaxial cable, fiber optic, digital subscriber line (digital subscriber line, DSL)) or wireless (e.g., infrared, wireless, microwave, etc.). The computer readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server, data center, etc. that contains an integration of one or more available media. The usable medium may be a magnetic medium (e.g., a floppy disk, a hard disk, a magnetic tape), an optical medium (e.g., a high-density digital video disc (digital video disc, DVD)), or a semiconductor medium (e.g., a Solid State Disk (SSD)), or the like.

The first terminal device, the second terminal device in the above-mentioned respective apparatus embodiments and the first terminal device and the second terminal device in the method embodiments completely correspond, the respective steps are performed by respective modules or units, for example, the communication unit (transceiver) performs the steps of receiving or transmitting in the method embodiments, and other steps than transmitting and receiving may be performed by the processing unit (processor). Reference may be made to corresponding method embodiments for the function of a specific unit. Wherein the processor may be one or more.

It should be appreciated that reference throughout this specification to "an embodiment" means that a particular feature, structure or characteristic described in connection with the embodiment is included in at least one embodiment of the present application. Thus, various embodiments are not necessarily referring to the same embodiments throughout the specification. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

It should be understood that, in the embodiment of the present application, the numbers "first" and "second" … are merely for distinguishing different objects, for example, for distinguishing different network devices, and are not limited to the scope of the embodiment of the present application, but the embodiment of the present application is not limited thereto.

It should also be understood that, in the present application, "when …", "if" and "if" all refer to the corresponding processing that the network element will make under some objective condition, and are not limited in time, nor do they require that the network element must have a judging action when implemented, nor are other limitations meant to be present.

It should also be understood that in embodiments of the present application, "B corresponding to A" means that B is associated with A from which B may be determined. It should also be understood that determining B from a does not mean determining B from a alone, but may also determine B from a and/or other information.

It should also be understood that the term "and/or" is merely one association relationship describing the associated object, and means that three relationships may exist, for example, a and/or B may mean: a exists alone, A and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship.

Items appearing in the present application that are similar to "include one or more of the following: the meaning of the expressions a, B, and C "generally means that the item may be any one of the following unless otherwise specified: a, A is as follows; b, a step of preparing a composite material; c, performing operation; a and B; a and C; b and C; a, B and C; a and A; a, A and A; a, A and B; a, a and C, a, B and B; a, C and C; b and B, B and C, C and C; c, C and C, and other combinations of a, B and C. The above is an optional entry for the item exemplified by 3 elements a, B and C, when expressed as "the item includes at least one of the following: a, B, … …, and X ", i.e. when there are more elements in the expression, then the entry to which the item is applicable can also be obtained according to the rules described above.

It will be understood that, in the embodiment of the present application, the first terminal device and the second terminal device may perform some or all of the steps in the embodiment of the present application, these steps or operations are merely examples, and the embodiment of the present application may also perform other operations or variations of various operations. Furthermore, the various steps may be performed in a different order presented in accordance with embodiments of the application, and it is possible that not all of the operations in the embodiments of the application may be performed.

Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

It will be clear to those skilled in the art that, for convenience and brevity of description, specific working procedures of the above-described systems, apparatuses and units may refer to corresponding procedures in the foregoing method embodiments, and are not repeated herein.

In the several embodiments provided by the present application, it should be understood that the disclosed systems, devices, and methods may be implemented in other manners. For example, the apparatus embodiments described above are merely illustrative, e.g., the division of the units is merely a logical function division, and there may be additional divisions when actually implemented, e.g., multiple units or components may be combined or integrated into another system, or some features may be omitted or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices or units, which may be in electrical, mechanical or other form.

The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, each functional unit in the embodiments of the present application may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit.

The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application may be embodied essentially or in a part contributing to the prior art or in a part of the technical solution, in the form of a software product stored in a storage medium, comprising several instructions for causing a computer device (which may be a personal computer, a server, a network device, etc.) to perform all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: a usb disk, a removable hard disk, a ROM, a RAM, a magnetic disk, or an optical disk, or other various media capable of storing program codes.

The foregoing is merely illustrative of the present application, and the present application is not limited thereto, and any person skilled in the art will readily recognize that variations or substitutions are within the scope of the present application.

Claims

1. A method of communication, comprising:

generating a first transport block;

2. The method of claim 1, wherein the determining, according to the first CAPC and the CAPC corresponding to the first transport block, to transmit the first transport block through the idle resource detected by the first LBT or the idle resource detected by the second LBT comprises:

3. The method of claim 2, wherein the generating the first transport block comprises:

4. A method according to claim 3, wherein the first communication connection comprises the first logical channel.

5. A method according to claim 3, wherein the first communication connection comprises a second logical channel; the second logical channel is a logical channel with the highest logical channel priority in the first communication connection, and the CAPC corresponding to the second logical channel is not lower than the first CAPC.

6. The method according to any one of claims 3 to 5, wherein said packetizing data in one or more logical channels comprised by the first communication connection comprises:

7. The method of claim 6, wherein the allocating resources to one or more logical channels in the first communication connection comprises:

8. The method of claim 6, wherein the allocating resources to one or more logical channels in the first communication connection comprises:

9. The method of claim 6, wherein the allocating resources to one or more logical channels in the first communication connection comprises:

10. The method of claim 6, wherein the allocating resources to one or more logical channels in the first communication connection comprises:

11. The method of claim 1, wherein the determining, according to the first CAPC and the CAPC corresponding to the first transport block, to transmit the first transport block through the idle resource detected by the first LBT or the idle resource detected by the second LBT comprises:

12. The method of claim 11, wherein the determining to transmit the first transport block over the idle resources detected by the first LBT based on the first parameter corresponding to the first LBT and the second parameter corresponding to the second LBT comprises:

13. The method of claim 11, wherein the method further comprises:

14. The method according to claim 12, wherein the method further comprises:

15. A communication device comprising means or units for performing the method of any one of claims 1 to 14.

16. A communication device, comprising: a processor;

the method of any of claims 1 to 14 when the processor invokes a computer program or instructions in memory.

17. A communication device, comprising: logic circuitry and a communication interface;

the communication interface is used for receiving information or sending information;

The logic circuitry to receive information or transmit information over the communication interface to cause the method of any one of claims 1 to 14 to be performed.

18. A computer-readable storage medium, comprising:

the computer readable storage medium is used for storing instructions or a computer program; the instructions or the computer program, when executed, cause the method of any one of claims 1 to 14 to be implemented.

19. A computer program product, comprising: instructions or computer programs;

the instructions or the computer program, when executed, cause the method of any one of claims 1 to 14 to be implemented.

20. A communication system comprising a communication device according to claim 15, or a communication device according to claim 16, or a communication device according to claim 17.