CN113498202A - Method for unauthorized frequency band transmission and communication equipment - Google Patents

Method for unauthorized frequency band transmission and communication equipment Download PDF

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Publication number
CN113498202A
CN113498202A CN202010263939.2A CN202010263939A CN113498202A CN 113498202 A CN113498202 A CN 113498202A CN 202010263939 A CN202010263939 A CN 202010263939A CN 113498202 A CN113498202 A CN 113498202A
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lbt
resource
resources
transmission
candidate
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鲁智
潘学明
李�根
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Vivo Mobile Communication Co Ltd
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Vivo Mobile Communication Co Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/52—Allocation or scheduling criteria for wireless resources based on load
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/12—Wireless traffic scheduling
    • H04W72/1263—Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management

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

Abstract

The invention provides a method for unauthorized frequency band transmission and communication equipment, which are applied to the communication equipment, wherein the method for unauthorized frequency band transmission comprises the following steps: carrying out information transmission through the target resource; wherein the target resource comprises: and monitoring the resources with successful LBT before talking among the scheduling resources and the candidate resources. According to the embodiment of the invention, the information transmission is carried out by using the resources which are successfully monitored for LBT before conversation in the scheduling resources and the candidate resources as the target resources, so that the condition that the information cannot be transmitted when the scheduling resources are not idle is avoided, and the reliability of URLLC transmission in the unlicensed frequency band is effectively ensured.

Description

Method for unauthorized frequency band transmission and communication equipment
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a method and a communications device for unlicensed frequency band transmission.
Background
The main scenes of 5G include Enhanced Mobile Broadband (eMBB), Ultra-Reliable and Low Latency Communications (URLLC), and massive Machine Type Communications (mtc), which set forth requirements for a system such as high reliability, Low Latency, large bandwidth, and wide coverage.
For an industrial scenario, low-latency and high-reliability services can be deployed in an unlicensed frequency band, which is beneficial to a region with a controllable interference environment or no operator coverage, and a factory owner can utilize sufficient bandwidth resources for data transmission. However, when there is interference, such as bursty interference, the communication device may not occupy the channel and therefore cannot transmit, which may affect the delay and reliability of URLLC traffic.
Disclosure of Invention
The invention provides a method for transmitting in an unauthorized frequency band and communication equipment, which are used for solving the problem of reliability of URLLC (Universal resource level control Link control) service in the unauthorized frequency band.
In order to solve the technical problem, the invention is realized as follows:
in a first aspect, an embodiment of the present invention provides a method for unlicensed frequency band transmission, which is applied to a communication device, and includes:
carrying out information transmission through the target resource;
wherein the target resource comprises: and monitoring the resources with successful LBT before talking among the scheduling resources and the candidate resources.
In a second aspect, an embodiment of the present invention further provides a communication device, including:
the transmission module is used for transmitting information through the target resource;
wherein the target resource comprises: and monitoring the resources with successful LBT before talking among the scheduling resources and the candidate resources.
In a third aspect, an embodiment of the present invention further provides a communication device, including: a memory, a processor and a computer program stored on the memory and executable on the processor, the computer program, when executed by the processor, implementing the steps of the method for unlicensed frequency band transmission described above.
In a fourth aspect, an embodiment of the present invention further provides a computer-readable storage medium, where a computer program is stored on the computer-readable storage medium, and when the computer program is executed by a processor, the steps of the method for unlicensed frequency band transmission are implemented.
The invention has the beneficial effects that:
according to the embodiment of the invention, the information transmission is carried out by using the resources which are successfully monitored for LBT before conversation in the scheduling resources and the candidate resources as the target resources, so that the condition that the information cannot be transmitted when the scheduling resources are not idle is avoided, and the reliability of URLLC transmission in the unlicensed frequency band is effectively ensured.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments of the present invention will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without inventive labor.
Fig. 1 is a diagram illustrating uplink transmission via sub-bands in the prior art;
fig. 2 is a flowchart illustrating a method for unlicensed frequency band transmission according to an embodiment of the present invention;
fig. 3 is a diagram illustrating an uplink transmission via a target resource according to an embodiment of the present invention;
fig. 4 is a second schematic diagram illustrating uplink transmission via a target resource according to an embodiment of the present invention;
fig. 5 is a third diagram illustrating uplink transmission via a target resource according to an embodiment of the present invention;
FIG. 6 is a fourth diagram illustrating uplink transmission via a target resource according to an embodiment of the present invention;
FIG. 7 is a fifth diagram illustrating uplink transmission via a target resource according to an embodiment of the present invention;
FIG. 8 shows a sixth embodiment of the present invention for uplink transmission via a target resource;
fig. 9 is a diagram illustrating a seventh example of uplink transmission via a target resource according to the present invention;
fig. 10 shows an eighth schematic diagram of uplink transmission via a target resource according to an embodiment of the present invention;
FIG. 11 is a ninth diagram illustrating uplink transmission via a target resource according to an embodiment of the present invention;
FIG. 12 is a block diagram of a communication device according to an embodiment of the present invention;
fig. 13 is a block diagram showing a configuration in which the communication device according to the embodiment of the present invention is a network device;
fig. 14 is a block diagram showing a terminal as a communication device according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in detail with reference to the accompanying drawings and specific embodiments.
For the unlicensed frequency band, a communication device (a network side device or a terminal) needs to detect whether a side channel is idle Before information transmission, that is, perform LBT (Listen Before Talk), and can perform transmission if the channel is idle. If the gbb sounding Channel is available, the gbb may schedule transmission of multiple PUSCHs (Physical Uplink Shared channels) through 1 DCI (Downlink Control Information), and when a gbb COT (Channel Occupancy Time) is Shared, the terminal may perform LBT only before the first PUSCH transmission after receiving the scheduling grant, and if LBT is successful, the terminal may continuously transmit multiple PUSCHs without performing LBT for each PUSCH transmission. This is beneficial to reducing the control signaling and LBT overhead, and the information transmission is as shown in fig. 1, if the terminal performs LBT successfully on subband a, the terminal will send PUSCH according to the gbb scheduling, and the terminal sends 4 PUSCH transmissions on the subband.
The invention provides a method for transmitting in an unauthorized frequency band aiming at the problems of time delay and reliability of URLLC service in the unauthorized frequency band.
As shown in fig. 2, an embodiment of the present invention provides a method for unlicensed frequency band transmission, which is applied to a communication device, and includes:
step 201, information transmission is carried out through target resources; wherein the target resource comprises: and monitoring the resources with successful LBT before talking among the scheduling resources and the candidate resources.
The communication equipment can be network side equipment or a terminal; that is to say, the unlicensed frequency band transmission method provided by the embodiment of the present invention is applicable to both unlicensed frequency band downlink transmission and unlicensed frequency band uplink transmission. The scheduling resource is a resource corresponding to a monitoring scheduling authorization configured by the network side equipment, and the candidate resource is other non-scheduling resources which are configured by the network side equipment and can carry out information transmission. The resource may be a subband, that is, the scheduling resource is a scheduling subband, the candidate resource is a candidate subband, for example, subband 1, subband 2 … N, and the subband may be a unit of 20Mhz bandwidth; the resource may also be referred to as a set of RBs (resource blocks).
Optionally, the network side device may also configure sub-bands 1 and 2 …, and N may all transmit scheduling grants. Thus, the terminal needs to perform a listening grant in each sub-band, and thus the sub-band may be referred to as a scheduling sub-band. The scheduling sub-band and the candidate sub-band in the embodiment of the invention are mainly for convenience of description.
The target resource is a resource for monitoring LBT successfully before the conversation between the scheduling resource and the candidate resource, the LBT success means that the monitoring resource/channel is idle, and the LBT failure means that the monitoring resource/channel is busy. The target resource can be one or more. When the communication device performs information transmission, the communication device performs data transmission by using at least one target resource that is successful in LBT, for example, when the LBT of the scheduling resource fails, the communication device performs transmission by using candidate resources that are successful in LBT, thereby ensuring the reliability of URLLC transmission.
When the communication device is a terminal, the terminal receives configuration information of scheduling resources and candidate resources configured by the network side device, for example, receives DCI sent by the network side device through RRC signaling, performs LBT on the scheduling resources and/or the candidate resources, and sends scheduled uplink transmission through a target resource. The uplink transmission may be: transmission of PUSCH; multiple transmissions (retransmissions) of the same TB (Transport Block); multiple transmissions of different TBs, e.g., one PUSCH per transmission opportunity (occasion); DL (downlink) grants scheduling repetitions of PUCCH (Physical Uplink Control Channel), i.e., Uplink channels for transmitting HARQ-ACK (Hybrid automatic repeat request acknowledgement) and the like.
When the communication equipment is network side equipment, the network side equipment configures scheduling resources and candidate resources for the terminal, and the network side equipment performs LBT on the scheduling resources and the candidate resources and sends downlink transmission through target resources. The downlink transmission may be: PDSCH (Physical downlink shared channel) transmission.
Specifically, the information transmission through the target resource may include: and under the condition that the scheduling resource LBT is successful, transmitting information through at least part of the successful scheduling resource LBT. In this embodiment, when the LBT of the scheduling resource is successful, the scheduling resource is preferentially selected as the target resource for information transmission. When performing information transmission, the communication device may perform information transmission on one scheduling resource that the LBT succeeds, or may perform information transmission on multiple scheduling resources that the LBT succeeds.
Optionally, the information transmission through the target resource may include: and under the condition that the scheduling resource LBT fails and the candidate resource LBT succeeds, information is transmitted through at least part of the candidate resources which are successful in LBT. The LBT failure refers to listening busy in the resource. In this embodiment, when the LBT fails to schedule the resources and the LBT of the candidate resource succeeds, at least a part of the candidate resource that succeeds in LBT is used as the target resource for information transmission. When performing information transmission, the communication device may perform information transmission on one candidate resource that is successful in LBT, or may perform information transmission on multiple candidate resources that are successful in LBT.
Optionally, in case that the scheduling resource LBT is successful and the candidate resource LBT is also successful, information transmission is performed through at least part of the scheduling resource LBT that is successful and at least part of the candidate resource LBT that is successful. When there are LBT successful resources in both the scheduling resource and the candidate resource, information transmission may be performed on the LBT successful resources. And when the LBT of the scheduling resource and the candidate resource fails, not transmitting information.
When the communication device transmits information, it may transmit on a resource, taking the communication device as a terminal and the resource as a subband as an example, and the terminal performs uplink transmission on a subband, then: if LBT succeeds on the scheduled subband, the terminal will send the network-scheduled uplink transmission on the scheduled subband (regardless of whether LBT on the other subbands was successful or not). Otherwise, the terminal performs uplink transmission on a certain candidate sub-band where the LBT succeeds. When the network side device configures transmission resources for the terminal, the indexes of the resources are configured at the same time, and the selection of the candidate subbands may be based on the index order of the candidate subbands, for example, a subband with a low candidate subband index is preferentially selected, as shown in fig. 3, taking the communication device as the terminal, the resources include a scheduling subband, a candidate subband 1 and a candidate subband 2, and the terminal fails in LBT on the scheduling subband, and succeeds in LBT on two candidate subbands, that is, the candidate subband 1 and the candidate subband 2, and according to the level of the candidate subband index value, may preferentially select PUSCH transmission only on the candidate subband 1.
When information is transmitted, the communication device may perform transmission on multiple resources, taking the communication device as a terminal and the resources as subbands, where the terminal performs uplink transmission on multiple subbands simultaneously, for example, the terminal sends uplink transmission on all subbands where LBT succeeds, and data of the uplink transmission is the same as data of a scheduling subband.
The terminal performs uplink transmission on multiple sub-bands simultaneously, and may select N sub-bands for uplink transmission, where N may be network configuration, predefined, or related to terminal capability. For example, the network side device configures M subbands for the terminal, the terminal may perform uplink transmission on N subbands simultaneously, where N is less than M, the terminal may perform uplink transmission on N subbands successful in LBT, and may select from low to high according to the subband index or in an opposite order, and the rule may be configured by the network side device or preconfigured. Of course, the network side device may determine which N subbands are by detecting a DMRS (Demodulation Reference Signal) of the PUSCH. As shown in fig. 4, the terminal fails to schedule the subband LBT, and succeeds in both of the 2 candidate subbands, i.e. candidate subband 1 and candidate subband 2LBT, and performs PUSCH transmission in both candidate subbands, i.e. transmits the same data content.
The terminal may send uplink transmission only in one subband or perform uplink transmission in all subbands where LBT succeeds by means of network side equipment configuration. For the network side device, the terminal is configured to send uplink transmission only in one sub-band, and when the network side device receives uplink transmission of the terminal in one sub-band, the network side device may schedule transmission of other users in other sub-bands configured for the terminal.
Optionally, when the communication device is a terminal, for power control of simultaneous transmission of multiple resources, information transmission may be implemented according to the following method:
and if the sum of the power of uplink transmission of each sub-band to be transmitted is smaller than the maximum transmitting power of the terminal, transmitting the uplink transmission by the power of each uplink transmission sub-band according to the indication (a power control command of scheduling authorization or a group power control command) of the network side equipment.
If the sum of the power of uplink transmission of each sub-band to be transmitted is greater than the maximum transmitting power of the terminal, optionally, for the scheduling sub-band, the terminal transmits uplink transmission according to the power control command of the scheduling authorization, and the remaining power is evenly distributed in the candidate sub-band. I.e. PCandidates＝(PMaximum transmission power-PScheduling sub-bands)/NCandidate sub-bandsWherein "P" isCandidates"is the transmit power of the candidate sub-band," PMaximum transmission powerIs the maximum transmission power of the terminal, PScheduling sub-bands"is the transmit power of the scheduling sub-band," NCandidate sub-bands"is the number of candidate subbands. Or, the power of each uplink transmission sub-band is compressed proportionally according to the maximum transmitting power of the terminal. I.e. PSub-band＝PMaximum transmission power/NSub-bandWherein "P" isSub-band"is the transmission power of the scheduling sub-band and the candidate sub-band," NSub-band"the sum of the number of scheduling subbands and candidate subbands, and the above-mentioned manner and parameters for power control may be configured by the network side device.
Taking the communication device as a terminal and the resource as a sub-band as an example, it should be noted that if the terminal succeeds in LBT of the candidate sub-band and performs uplink transmission, information such as frequency domain resource and MCS (Modulation and coding scheme) of the uplink transmission is indicated according to the scheduling grant corresponding to the scheduling sub-band. If the RS (Reference Signal) configured for different sub-bands causes a difference in actually transmitted resources, the terminal will perform rate matching or puncturing operation. And the rate matching is carried out according to the size of the transmission block indicated by the scheduling authorization, the REs which cannot be mapped on the candidate sub-band are not mapped, and if the number of the REs of the candidate sub-band is different from that of the scheduling sub-band, corresponding punching and rate matching are carried out.
The same TBS (Transport Block Size) is used for uplink transmission of the scheduling subband and the candidate subband. For multiple transmissions scheduled by one scheduling grant, it may be the repetition of the same TB, where the same HARQ process is used, where each transmission is for one nominal (nominal) transmission, and the transmission is not necessarily limited to the TTI length; or multiple transmissions of different TBs, where each transmission employs a different HARQ process. The first transmitted process number is indicated by the scheduling grant and the process number for the subsequent transmission is obtained as the first process number + 1.
Optionally, before the information transmission is performed through the target resource, the method further includes: performing LBT on the scheduling resource and the candidate resource simultaneously; or, LBT is performed on the scheduled resources and the candidate resources, respectively, in a first order.
Before the communication device transmits information through the target resource, the communication device needs to perform LBT on the transmission resource, and taking the communication device as a terminal and the resource as a subband as an example, the terminal can perform LBT on a scheduling subband and a configured candidate subband at the same time; optionally, the communication device may further perform LBT on the scheduling resource and the candidate resource respectively according to a first order. Wherein, the first order may be that resources are scheduled first and then candidate resources are selected, for example, LBT is performed on the scheduled resources; and if the scheduling of the resource LBT fails, carrying out LBT on the candidate resource. Alternatively, the first order may be to schedule resources first after candidate resources, e.g., to perform LBT on the candidate resources; and if the candidate resource LBT fails, carrying out LBT on the scheduling resource.
Alternatively, the first order may be determined by listening for a priority, for example, the priority of the scheduling resource is higher than the priority of the candidate resource, or the priority of the candidate resource is higher than the priority of the scheduling resource.
Taking the communication device as a terminal and the resource as a subband as an example, the terminal preferentially performs LBT on a scheduling subband, and if the LBT is successful, a PUSCH is sent on the scheduling subband; if the LBT is unsuccessful, the terminal performs LBT on other candidate subbands, and sends uplink transmission on the subband where the first LBT is successful, as shown in fig. 5, the terminal configures according to the network side device, and the number of uplink transmissions is 4. The terminal may also determine the LBT order according to the index order of the candidate subbands.
In some embodiments of the present invention, the first order may be determined according to a predefined rule and/or transmission mode (pattern) information, and the transmission mode information may be configured for a network side device. For example: the predefined rule indicates the order of LBT of the communication equipment on the scheduling resource and the candidate resource, and the communication equipment performs LBT on the scheduling resource and the candidate resource according to the indicated order of LBT; or, the network side device configures transmission mode information for indicating an order of LBT performed by the communication device on the scheduling resource and the candidate resource.
The transmission mode information is configured through Radio Resource Control (RRC) signaling and/or indicated through downlink Control information DCI.
The configuration of the transmission mode information may be determined according to the service characteristics of the terminal, the number of transmission times of the PUSCH or the number of resources configured for the terminal, or may be determined based on an uplink resource set configured in the cell, or an available resource set in a COT indication of a TDD (Time Division Duplex) cell base station. The network side equipment configures the transmission mode information of information transmission, which is beneficial to improving the successful probability of LBT and improving the reliability of URLLC service transmission of the communication equipment.
Specifically, the transmission mode information may include at least one of:
(A) the number of resources configured by the network side device indicates the number of resources in a bitmap (bitmap) manner, for example: using a bitmap mode to indicate the number of candidate sub-bands, and assuming that the maximum number of the candidate sub-bands is 4;
(B) listen for time offsets on different resources before a session, for example: LBT operates on the time offsets of different candidate subbands, referenced to the scheduling subband;
(C) the number of resources for information transmission, for example: single sub-band transmission or simultaneous transmission of multiple sub-bands;
(D) the index order of each resource, such as the index and order of each subband;
(E) number of monitors listened to before conversation.
It should be noted that the transmission mode information may include parameter information of the candidate resource, and may also include parameter information of the scheduling resource. When the network side device configures the transmission mode information for the terminal, the network side device may include one or more of the above items, and when the transmission mode information includes a part of the above information, other information may be configured by a higher layer alone, or determined by a predefined default rule. For example: the parameters may be obtained through RRC signaling or DCI signaling, respectively, or through a combination of RRC signaling and DCI signaling, for example, some parameters are configured by RRC, some parameters are indicated by DCI, or obtained implicitly through other methods. In this embodiment, there may be an offset between the scheduling resource and the candidate resource, and between multiple candidate resources, and the slice may be configured by the network side device.
It is further worth mentioning that, when there are multiple scheduling resources or candidate resources, the method further comprises: the communication equipment respectively carries out LBT on a plurality of scheduling resources according to a second sequence; and/or the communication device performs LBT on the plurality of candidate resources respectively according to the third order. The second order and/or the third order may also be determined according to predefined rules and/or transmission mode (pattern) information configured by the network side device.
Taking the transmission mode information including the number of resources configured by the network side device as 4, the time offset (offset) of listening to different resources before a session is 1slot (slot), and the number of resources for information transmission is 1, that is, single subband transmission as an example, as shown in fig. 6, the network side device configures 4 candidate subbands for the terminal, and when the network side device indicates that the number of repeated transmissions by the terminal is 4, the transmission mode information configured by the network side device for the terminal is {1110, offset is 1slot, single subband transmission }, that is, LBT is performed using only 3 of the subbands, in this embodiment, it is assumed that multiple transmissions are multiple PUSCH transmissions. When the network side device configures 4 candidate subbands for the terminal and the network side device instructs the terminal to repeat transmission number 2, the configured transmission mode information is {1000, offset ═ 1slot, single subband transmission }, that is, LBT is performed using only one of the candidate subbands, as shown in fig. 7. For fig. 4, the transmission mode information configured for the terminal by the network side device may be {1100, offset ═ 0, multi-subband transmission }.
Optionally, the transmission mode information configured by the network side device for the terminal may be a set of patterns, and then a subset is selected from the set, for example, activated by a MAC (media Access Control) CE (Control Element), and a pattern in the configured subset is indicated by DCI, so as to increase flexibility of configuration. For example: the pattern set includes N sets { P1, P2, … PN }, each element containing { Ai, Bi, Ci }, i ═ 1, 2 … N. The network side equipment selects 4 patterns { P out of the patternss1，Ps2，Ps3，Ps4It is configured to the terminal, and adds a pattern indication field, denoted as 2bits in this embodiment, in the DCI, so that one pattern in the pattern set can be indicated in the scheduling grant.
Alternatively, the transmission mode information may include an index order of each resource, by which an LBT order of the resources is indicated. The network side device indicates the LBT order of the resources in the transmission mode information, for example, the transmission mode information includes the index order of each subband. For example: the transmission mode information indicates that the number of resources configured by the network side device is 4, that is, there are 4 subbands in total, and the subband indexes are: 00, 01, 10, 11; the transmission mode information configured by the network side device may be { (01, 10, 00), and offset { (1 slot, single subband transmission }, that is, LBT is performed using only 3 subbands, where the order of the subband LBT is: candidate subband 2, candidate subband 3, and candidate subband 1, as shown in fig. 8.
Alternatively, a dedicated transmission mode indication field may be designed in the DCI, as shown in the following table:
Figure BDA0002440498350000091
Figure BDA0002440498350000101
for the parameters { a, B, C } in the above table, the parameters may be obtained through RRC signaling or a combination of DCI signaling, for example, some parameters are configured by RRC, some parameters are indicated by DCI, or implicitly obtained by other methods, which is not described herein again.
Further, to ensure the transmission delay, when the transmission mode information is configured with an offset, the total transmission delay of the terminal may be indicated, as shown in fig. 9, where the offset of 3 candidate subbands indicated by the transmission mode information is 1slot, and the transmission frequency is 4 for single subband transmission. The total transmission delay is 4 slots, if LBT succeeds on the scheduling subband, the terminal will transmit 4 PUSCHs, if LBT succeeds on the candidate subband 3, the terminal will only transmit for the 1 st time, and the remaining 3 transmissions will be discarded. The network side device may configure whether to discard the corresponding transmission in the LBT failure scenario or perform the indicated transmission number transmission on the LBT successful resource when there are multiple transmissions, for example, when there are repeated transmissions.
Optionally, when the transmission mode information includes the number of resources configured by the network side device and the number of monitors monitored before a session, and when the number of monitors monitored before a session is greater than the number of resources configured by the network side device, performing LBT on the scheduling resource again, or performing LBT on the candidate resource by polling.
For example: the transmission mode information configured for the terminal by the network side equipment is as follows: { (01, 10, 00), offset ═ 1slot, single subband transmission, 6}, and the monitoring order of the subbands is as shown in fig. 10, i.e. if the number of LBT monitoring is greater than the number of subbands, LBT monitoring will be resumed by the scheduling subband, or monitoring is polled only from the candidate subband by the network side device configuration.
Optionally, the scheduling resource in the embodiment of the present invention may be a resource set, and the candidate resource may also be a resource set, as shown in fig. 11, a network side device configures a scheduling subband set and a candidate subband set respectively, where the scheduling subband set includes a scheduling subband 1 and a scheduling subband 2, the candidate subband set includes a candidate subband 1 and a candidate subband 2, LBT is performed on the scheduling subband 1, the scheduling subband 2, the candidate subband 1, and the candidate subband 2, respectively, and information transmission is performed on a subband in which LBT is successful. The LBT order for the multiple scheduling subbands or the multiple candidate subbands may be determined according to predefined rules and/or transmission mode information configured by the network side device. Wherein the scheduling subband and the candidate subband may be numbered according to the resource index value.
According to the embodiment of the invention, the information transmission is carried out by using the resources which are successfully monitored for LBT before conversation in the scheduling resources and the candidate resources as the target resources, so that the condition that the information cannot be transmitted when the scheduling resources are not idle is avoided, and the reliability of URLLC transmission in the unlicensed frequency band is effectively ensured.
As shown in fig. 12, an embodiment of the present invention provides a communication apparatus 1200, including:
a transmission module 1210 configured to transmit information through a target resource;
wherein the target resource comprises: and monitoring the resources with successful LBT before talking among the scheduling resources and the candidate resources.
Optionally, the transmission module 1210 is specifically configured to: and under the condition that the scheduling resource LBT is successful, transmitting information through at least part of the successful scheduling resource LBT.
Optionally, the transmission module 1210 is specifically configured to: and under the condition that the scheduling resource LBT fails and the candidate resource LBT succeeds, information is transmitted through at least part of the candidate resources which are successful in LBT.
Optionally, the transmission module 1210 is specifically configured to: and under the condition that the scheduling resource LBT is successful and the candidate resource LBT is also successful, transmitting information through at least part of the scheduling resource which is successful in LBT and at least part of the candidate resource which is successful in LBT.
Optionally, the communication device further comprises:
a monitoring module, configured to perform LBT on the scheduling resource and the candidate resource simultaneously; or,
LBT is performed on the scheduled resources and the candidate resources, respectively, in a first order.
Optionally, the monitoring module is specifically configured to: performing LBT on the scheduling resources;
and if the scheduling of the resource LBT fails, carrying out LBT on the candidate resource.
Optionally, the first order is determined according to a predefined rule and/or transmission mode information.
Optionally, the transmission mode information is configured through radio resource control RRC signaling and/or indicated through downlink control information DCI.
Optionally, the transmission mode information includes at least one of:
the number of resources configured by the network side equipment;
monitoring time offsets of different resources before conversation;
the number of resources for information transmission;
the index order of each resource;
number of monitors listened to before conversation.
Optionally, when the monitored number monitored before the session is greater than the number of resources configured by the network side device, performing LBT on the scheduling resource again, or performing LBT on the candidate resource by polling.
Optionally, when LBT of both the scheduling resource and the candidate resource fails, no information transmission is performed.
Optionally, when the communication device is a terminal, the transmission module 1210 is specifically configured to: the scheduled uplink transmission is sent via the target resource.
Optionally, when the communication device is a network-side device, the transmission module 1210 is specifically configured to: and sending downlink transmission through the target resource.
It should be noted that, the embodiment of the communication device is a communication device corresponding to the method for unlicensed frequency band transmission applied to the communication device, and all implementations of the embodiment are applicable to the embodiment of the communication device, and the same technical effects as those of the embodiment of the communication device can also be achieved.
According to the embodiment of the invention, the communication equipment uses the resources which are successfully monitored for LBT before conversation in the scheduling resources and the candidate resources as the target resources to carry out information transmission, so that the condition that the information cannot be transmitted when the scheduling resources are not idle is avoided, and the reliability of URLLC transmission in the unlicensed frequency band is effectively ensured.
An embodiment of the present invention further provides a communication device, including: the memory, the processor, and the computer program stored in the memory and capable of running on the processor, when executed by the processor, implement each process in the above-mentioned method embodiment of unlicensed frequency band transmission, and can achieve the same technical effect, and in order to avoid repetition, details are not described here again.
The communication device of the embodiment of the present invention may be a network side device or a terminal, and fig. 13 is a structural diagram when the communication device is a network side device, which can implement details of the method for unauthorized frequency band transmission described above and achieve the same effect. As shown in fig. 13, when the communication device is a network device 1300, the communication device includes: a processor 1301, a transceiver 1302, a memory 1303 and a bus interface, wherein:
the processor 1301 is configured to read the program in the memory 1303, and execute the following processes:
carrying out information transmission through the target resource; wherein the target resource comprises: and monitoring the resources with successful LBT before talking among the scheduling resources and the candidate resources.
In fig. 13, the bus architecture may include any number of interconnected buses and bridges, with one or more processors represented by processor 1301 and various circuits of memory represented by memory 1303 linked together. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The bus interface provides an interface. The transceiver 1302 may be a plurality of elements including a transmitter and a receiver that provide a means for communicating with various other apparatus over a transmission medium.
Optionally, the processor 1301 is configured to read a program in the memory 1303, and execute the following processes:
and under the condition that the scheduling resource LBT is successful, transmitting information through at least part of the successful scheduling resource LBT.
Optionally, the processor 1301 is configured to read a program in the memory 1303, and execute the following processes:
and under the condition that the scheduling resource LBT fails and the candidate resource LBT succeeds, information is transmitted through at least part of the candidate resources which are successful in LBT.
Optionally, the processor 1301 is configured to read a program in the memory 1303, and execute the following processes:
and under the condition that the scheduling resource LBT is successful and the candidate resource LBT is also successful, transmitting information through at least part of the scheduling resource which is successful in LBT and at least part of the candidate resource which is successful in LBT.
Optionally, the processor 1301 is further configured to, before information transmission through the target resource:
performing LBT on the scheduling resource and the candidate resource simultaneously; or,
LBT is performed on the scheduled resources and the candidate resources, respectively, in a first order.
Optionally, the processor 1301 performs the following procedures when performing LBT on the scheduling resource and the candidate resource respectively according to a first order:
performing LBT on the scheduling resources;
and if the scheduling of the resource LBT fails, carrying out LBT on the candidate resource.
Optionally, the first order is determined according to a predefined rule and/or transmission mode information.
Optionally, the transmission mode information is configured through radio resource control RRC signaling and/or indicated through downlink control information DCI.
Optionally, the transmission mode information includes at least one of:
the number of resources configured by the network side equipment;
monitoring time offsets of different resources before conversation;
the number of resources for information transmission;
the index order of each resource;
number of monitors listened to before conversation.
Optionally, when the monitored number monitored before the session is greater than the number of resources configured by the network side device, performing LBT on the scheduling resource again, or performing LBT on the candidate resource by polling.
Optionally, when LBT of both the scheduling resource and the candidate resource fails, no information transmission is performed.
Optionally, when the communication device is a terminal and the processor 1301 performs information transmission through a target resource, the following process is performed:
the scheduled uplink transmission is sent via the target resource.
Optionally, when the communication device is a network side device and the processor 1301 performs information transmission through a target resource, the following process is performed:
and sending downlink transmission through the target resource.
The network side device may be a Base Transceiver Station (BTS) in Global System for Mobile communications (GSM) or Code Division Multiple Access (CDMA), a Base Station (NodeB, NB) in Wideband Code Division Multiple Access (WCDMA), an evolved Node B (evolved Node B, eNB or eNodeB) in LTE, a relay Station or Access point, or a Base Station in a future 5G network, and the like, which is not limited herein.
Fig. 14 is a schematic diagram of a hardware structure when the communication device is a terminal according to an embodiment of the present invention.
When the communication device is the terminal 140, the following devices are included, but not limited to: radio frequency unit 1410, network module 1420, audio output unit 1430, input unit 1440, sensor 1450, display unit 1460, user input unit 1470, interface unit 1480, memory 1490, processor 1411, and power supply 1412. Those skilled in the art will appreciate that the terminal configuration shown in fig. 14 is not intended to be limiting, and that the terminal may include more or fewer components than shown, or some components may be combined, or a different arrangement of components. In the embodiment of the present invention, the terminal includes, but is not limited to, a mobile phone, a tablet computer, a notebook computer, a palm computer, a vehicle-mounted terminal, a wearable device, a pedometer, and the like.
The processor 1411 is configured to transmit information through a target resource; wherein the target resource comprises: and monitoring the resources with successful LBT before talking among the scheduling resources and the candidate resources.
It should be understood that, in the embodiment of the present invention, the radio frequency unit 1410 may be configured to receive and transmit signals during a message receiving or call process, and specifically, receive downlink data from a network-side device and then process the received downlink data in the processor 1411; in addition, the uplink data is sent to the network side equipment. In general, radio unit 1410 includes, but is not limited to, an antenna, at least one amplifier, a transceiver, a coupler, a low noise amplifier, a duplexer, and the like. In addition, the radio frequency unit 1410 may also communicate with a network and other devices through a wireless communication system.
The terminal provides the user with wireless broadband internet access through the network module 1420, such as helping the user send and receive e-mails, browse web pages, and access streaming media.
The audio output unit 1430 may convert audio data received by the radio frequency unit 1410 or the network module 1420 or stored in the memory 1490 into an audio signal and output as sound. Also, the audio output unit 1430 may also provide audio output related to a specific function performed by the terminal 140 (e.g., a call signal reception sound, a message reception sound, etc.). The audio output unit 1430 includes a speaker, a buzzer, a receiver, and the like.
The input unit 1440 is used for receiving audio or video signals. The input Unit 1440 may include a Graphics Processing Unit (GPU) 1441 and a microphone 1442, and the Graphics processor 1441 processes image data of still pictures or videos obtained by an image capturing device (e.g., a camera) in a video capturing mode or an image capturing mode. The processed image frames may be displayed on the display unit 1460. The image frames processed by the graphic processor 1441 may be stored in the memory 1490 (or other storage medium) or transmitted via the radio frequency unit 1410 or the network module 1420. Microphone 1442 may receive sound and may be capable of processing such sound into audio data. The processed audio data may be converted into a format output transmittable to the mobile communication network side device via the radio frequency unit 1410 in case of the phone call mode.
The terminal 140 also includes at least one sensor 1450, such as light sensors, motion sensors, and other sensors. Specifically, the light sensor includes an ambient light sensor that adjusts the brightness of the display panel 1461 according to the brightness of ambient light, and a proximity sensor that turns off the display panel 1461 and/or a backlight when the terminal 140 moves to the ear. As one of the motion sensors, the accelerometer sensor can detect the magnitude of acceleration in each direction (generally three axes), detect the magnitude and direction of gravity when stationary, and can be used to identify the terminal posture (such as horizontal and vertical screen switching, related games, magnetometer posture calibration), vibration identification related functions (such as pedometer, tapping), and the like; the sensors 1450 may also include fingerprint sensors, pressure sensors, iris sensors, molecular sensors, gyroscopes, barometers, hygrometers, thermometers, infrared sensors, etc., which are not described in detail herein.
The display unit 1460 is used to display information input by a user or information provided to a user. The Display unit 1460 may include a Display panel 1461, and the Display panel 1461 may be configured in the form of a Liquid Crystal Display (LCD), an Organic Light-Emitting Diode (OLED), or the like.
The user input unit 1470 may be used to receive input numeric or character information and generate key signal inputs related to user settings and function control of the terminal. Specifically, the user input unit 770 includes a touch panel 1471 and other input devices 1472. Touch panel 1471, also referred to as a touch screen, may collect touch operations by a user on or near the touch panel 1471 (e.g., operations by a user on or near touch panel 1471 using a finger, a stylus, or any other suitable object or attachment). The touch panel 1471 may include two parts of a touch detection device and a touch controller. The touch detection device detects the touch direction of a user, detects a signal brought by touch operation and transmits the signal to the touch controller; the touch controller receives touch information from the touch sensing device, converts the touch information into touch point coordinates, sends the touch point coordinates to the processor 1411, receives a command from the processor 1411, and executes the command. In addition, the touch panel 1471 may be implemented in various types, such as a resistive type, a capacitive type, an infrared ray, and a surface acoustic wave. The user input unit 1470 may include other input devices 1472 in addition to the touch panel 1471. In particular, other input devices 1472 may include, but are not limited to, a physical keyboard, function keys (e.g., volume control keys, switch keys, etc.), a trackball, a mouse, and a joystick, which are not described herein.
Further, the touch panel 1471 may be overlaid on the display panel 1461, and when the touch panel 1471 detects a touch operation on or near the touch panel 1471, the touch operation is transmitted to the processor 1411 to determine the type of the touch event, and then the processor 1411 provides a corresponding visual output on the display panel 1461 according to the type of the touch event. Although in fig. 14, the touch panel 1471 and the display panel 1461 are two independent components to implement the input and output functions of the terminal, in some embodiments, the touch panel 1471 and the display panel 1461 may be integrated to implement the input and output functions of the terminal, and this is not limited herein.
An interface unit 1480 is an interface for connecting an external device to the terminal 140. For example, the external device may include a wired or wireless headset port, an external power supply (or battery charger) port, a wired or wireless data port, a memory card port, a port for connecting a device having an identification module, an audio input/output (I/O) port, a video I/O port, an earphone port, and the like. The interface unit 1480 may be used to receive input (e.g., data information, power, etc.) from an external device and transmit the received input to one or more elements within the terminal 140 or may be used to transmit data between the terminal 140 and an external device.
The memory 1490 may be used to store software programs as well as various data. The memory 1490 may mainly include a program storage area and a data storage area, wherein the program storage area may store an operating system, an application program required by at least one function (such as a sound playing function, an image playing function, etc.), and the like; the storage data area may store data (such as audio data, a phonebook, etc.) created according to the use of the cellular phone, and the like. Further, the memory 1440 may include high speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other volatile solid state storage device.
The processor 1411 is a control center of the terminal, connects various parts of the entire terminal using various interfaces and lines, performs various functions of the terminal and processes data by running or executing software programs and/or modules stored in the memory 1490 and calling data stored in the memory 1490, thereby monitoring the entire terminal. Processor 1411 may include one or more processing units; preferably, the processor 1411 may integrate an application processor, which mainly handles operating systems, user interfaces, application programs, etc., and a modem processor, which mainly handles wireless communications. It will be appreciated that the modem processor described above may not be integrated into the processor 1411.
The terminal 140 may also include a power source 1412 (e.g., a battery) for powering the various components, and preferably, the power source 1412 may be logically connected to the processor 1411 via a power management system, such that the functions of managing charging, discharging, and power consumption are performed via the power management system.
In addition, the terminal 140 includes some functional modules that are not shown, and are not described in detail herein.
It should be further noted that the processor 1411 is further configured to implement other processes in the method for unlicensed frequency band transmission applied to a communication device in the foregoing embodiment, which is not described herein again.
The embodiment of the present invention further provides a computer-readable storage medium, where a computer program is stored on the computer-readable storage medium, and when the computer program is executed by a processor, the computer program implements each process of the method embodiment for unlicensed frequency band transmission, and can achieve the same technical effect, and in order to avoid repetition, the computer program is not described herein again. The computer-readable storage medium may be a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solutions of the present invention may be embodied in the form of a software product, which is stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a terminal (such as a mobile phone, a computer, a server, an air conditioner, or a network-side device) to execute the method according to the embodiments of the present invention.
While the preferred embodiments of the present invention have been described, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the following claims.

Claims (16)

1. A method for unlicensed frequency band transmission, applied to a communication device, includes:
carrying out information transmission through the target resource;
wherein the target resource comprises: and monitoring the resources with successful LBT before talking among the scheduling resources and the candidate resources.
2. The method of claim 1, wherein the transmitting information via the target resource comprises:
and under the condition that the scheduling resource LBT is successful, transmitting information through at least part of the successful scheduling resource LBT.
3. The method of claim 1, wherein the transmitting information via the target resource comprises:
and under the condition that the scheduling resource LBT fails and the candidate resource LBT succeeds, information is transmitted through at least part of the candidate resources which are successful in LBT.
4. The method of claim 1, wherein the transmitting information via the target resource comprises:
and under the condition that the scheduling resource LBT is successful and the candidate resource LBT is also successful, transmitting information through at least part of the scheduling resource which is successful in LBT and at least part of the candidate resource which is successful in LBT.
5. The method of any of claims 1 to 4, wherein before the information transmission via the target resource, the method further comprises:
performing LBT on the scheduling resource and the candidate resource simultaneously; or
LBT is performed on the scheduled resources and the candidate resources, respectively, in a first order.
6. The method of claim 5, wherein the performing LBT on the scheduled resources and the candidate resources according to the first order comprises:
performing LBT on the scheduling resources;
and if the scheduling of the resource LBT fails, carrying out LBT on the candidate resource.
7. The method of claim 5, wherein the first order is determined according to a predefined rule and/or transmission mode information.
8. The method of claim 7, wherein the transmission mode information is configured through Radio Resource Control (RRC) signaling and/or indicated through Downlink Control Information (DCI).
9. The method of claim 7, wherein the transmission mode information comprises at least one of:
the number of resources configured by the network side equipment;
monitoring time offsets of different resources before conversation;
the number of resources for information transmission;
the index order of each resource;
number of monitors listened to before conversation.
10. The method of claim 9, wherein LBT is performed on the scheduled resource again or the candidate resource is polled for LBT if the monitored number of listen-before-talk is greater than the number of resources configured by the network side device.
11. The method of claim 1, wherein no information is transmitted when LBT of the scheduling resource and the candidate resource fails.
12. The method according to claim 1, wherein when the communication device is a terminal, the performing information transmission via the target resource includes:
the scheduled uplink transmission is sent via the target resource.
13. The method according to claim 1, wherein when the communication device is a network side device, the performing information transmission via the target resource includes:
and sending downlink transmission through the target resource.
14. A communication device, comprising:
the transmission module is used for transmitting information through the target resource;
wherein the target resource comprises: and monitoring the resources with successful LBT before talking among the scheduling resources and the candidate resources.
15. A communication device, comprising: memory, processor and computer program stored on the memory and executable on the processor, the computer program, when executed by the processor, implementing the steps of the method of unlicensed frequency band transmission according to any of claims 1 to 13.
16. A computer-readable storage medium, having stored thereon a computer program which, when being executed by a processor, carries out the steps of the method for unlicensed frequency band transmission according to any one of claims 1 to 13.
CN202010263939.2A 2020-04-07 2020-04-07 Method for unauthorized frequency band transmission and communication equipment Pending CN113498202A (en)

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