CN111385883B - Data transmission method and device, storage medium and terminal - Google Patents
Data transmission method and device, storage medium and terminal Download PDFInfo
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- CN111385883B CN111385883B CN201811624186.2A CN201811624186A CN111385883B CN 111385883 B CN111385883 B CN 111385883B CN 201811624186 A CN201811624186 A CN 201811624186A CN 111385883 B CN111385883 B CN 111385883B
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- H04—ELECTRIC COMMUNICATION TECHNIQUE
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- H04W72/50—Allocation or scheduling criteria for wireless resources
- H04W72/53—Allocation or scheduling criteria for wireless resources based on regulatory allocation policies
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- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
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- H04W72/50—Allocation or scheduling criteria for wireless resources
- H04W72/56—Allocation or scheduling criteria for wireless resources based on priority criteria
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Abstract
A data transmission method and device, a storage medium and a terminal are provided, and the method comprises the following steps: acquiring transmission mode information of resources; acquiring service transmission mode information of at least one candidate logical channel; determining a candidate logical channel of the at least one candidate logical channel, in which the traffic transmission mode information matches the transmission mode information of the resource, as a first logical channel; and transmitting the data carried by the first logical channel by using the resource. The scheme provided by the invention can effectively reduce the transmission time delay of the data, improve the transmission reliability and improve the utilization efficiency of resources.
Description
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a data transmission method and apparatus, a storage medium, and a terminal.
Background
According to the related specifications of Institute of Electrical and Electronics Engineers (IEEE) 802.1QBV, a packet of Time-Sensitive Networking (TSN) traffic arrives with a fixed start position (offset) and period, and the amount of data arriving at each Time has a fixed size. Wherein the starting position is based on a TSN clock (TSN clock). The above feature is also provided for the arrival of data packets of some services in other services, such as vehicle to outside information exchange (V2X for short, also called as vehicle to exchanging).
According to the relevant provisions of the existing communication protocol, the base station allocates uplink radio resources for each User Equipment (per-User Equipment, per-UE for short).
The resources corresponding to these configuration grants (configured grants) configured by the base station for the UE may be used to support deterministic periodic services. A Radio Access Network (RAN) 1#95 conference has agreed to support configuration of transmission mode information (configured grant) for configuring and activating multiple sets of resources on a given partial Bandwidth (BWP) of a serving cell (serving cell) to support multiple different services (service), traffic types (traffic types), multiple services (multiple industries), TSN streams (TSN streams with different characteristics), etc. to enhance transmission reliability and reduce transmission delay.
On the other hand, the UE or the core network may notify the base station of some traffic transmission mode (traffic pattern) information of the uplink TSN traffic, which helps the base station to accurately configure uplink grant (configured), semi-Persistent Scheduling (SPS) resources, etc. for the UE.
Disclosure of Invention
The invention solves the technical problem of how to reduce the transmission time delay of data, improve the transmission reliability and improve the utilization efficiency of resources.
To solve the foregoing technical problem, an embodiment of the present invention provides a data transmission method, including: acquiring transmission mode information of resources; acquiring service transmission mode information of at least one candidate logical channel; determining a candidate logical channel of the at least one candidate logical channel, in which the traffic transmission mode information matches the transmission mode information of the resource, as a first logical channel; and transmitting the data carried by the first logical channel by using the resource.
Optionally, the at least one candidate logical channel is obtained by screening according to the transmission format configuration information associated with the resource.
Optionally, the determining, as the first logical channel, a candidate logical channel of the at least one candidate logical channel whose traffic transmission mode information matches the transmission mode information of the resource includes: and traversing the at least one candidate logical channel, and determining the candidate logical channel in which the matching degree of the service transmission mode information and the transmission mode information of the resource is greater than a preset threshold value as the first logical channel.
Optionally, the determining, by traversing the at least one candidate logical channel, the candidate logical channel in which the matching degree between the traffic transmission mode information and the transmission mode information of the resource is greater than a preset threshold as the first logical channel includes: for each candidate logical channel, sequentially comparing the matching degree of each parameter contained in the service transmission mode information of the candidate logical channel with the corresponding parameter contained in the transmission mode information of the resource; determining the matching degree of the service transmission mode information of the candidate logical channel and the transmission mode information of the resource according to the matching degree of each parameter; and if the matching degree is greater than the preset threshold value, determining the candidate logical channel as the first logical channel.
Optionally, the transmitting the data carried by the first logical channel by using the resource includes: preferentially transmitting data carried by the first logical channel by using the resources; after the data carried by the first logical channel is preferentially transmitted, if the resource has a residual part, the residual part of the resource is used for transmitting the data carried by the candidate logical channel except the first logical channel in the at least one candidate logical channel.
Optionally, the transmitting, if there is a remaining portion of the resource, data carried by a candidate logical channel, except for the first logical channel, of the at least one candidate logical channel using the remaining portion of the resource includes: judging whether the service transmission mode information of the candidate logical channel except the first logical channel in the at least one candidate logical channel is matched with the transmission mode information of other resources, wherein the other resources and the resources are configured by a base station; determining a candidate logical channel in which the service transmission mode information and the transmission mode information of other resources in the judgment result are not matched as a second logical channel; transmitting data carried by the second logical channel using a remaining portion of the resources.
Optionally, the transmitting the data carried by the first logical channel by using the resource includes: preferentially transmitting data carried by the first logical channel by using the resources; and if the resource has the residual part, not using the residual part of the resource to continue data transmission.
Optionally, the obtaining transmission mode information of the resource includes: and acquiring the transmission mode information of the resource from the message received from the base station.
Optionally, the message of the base station is selected from: RRC signaling and DCI.
Optionally, for each candidate logical channel, the traffic transmission mode information of the candidate logical channel is obtained based on the MAC layer.
Optionally, the transmission mode information of the resource includes parameters selected from: a period of the resource, a starting location of the resource, and a size of the resource.
Optionally, the service transmission mode information of the candidate logical channel includes parameters selected from: the period of the service associated with the candidate logical channel, the starting position of the arrival of the service, and the data volume of each arrival of the service.
Optionally, the resource is a periodically configured resource.
An embodiment of the present invention further provides a data transmission apparatus, including: the first acquisition module is used for acquiring the transmission mode information of the resource; a second obtaining module, configured to obtain service transmission mode information of at least one candidate logical channel; a determining module, configured to determine, as a first logical channel, a candidate logical channel in the at least one candidate logical channel, where the traffic transmission mode information matches the transmission mode information of the resource; and the data transmission module is used for transmitting the data carried by the first logic channel by using the resource.
The embodiment of the present invention further provides a storage medium, on which computer instructions are stored, and when the computer instructions are executed, the steps of the method are executed.
The embodiment of the present invention further provides a terminal, which includes a memory and a processor, where the memory stores computer instructions capable of being executed on the processor, and the processor executes the steps of the method when executing the computer instructions.
Compared with the prior art, the technical scheme of the embodiment of the invention has the following beneficial effects:
an embodiment of the present invention provides a data transmission method, including: acquiring transmission mode information of resources; acquiring service transmission mode information of at least one candidate logical channel; determining a candidate logical channel of the at least one candidate logical channel, in which the traffic transmission mode information matches the transmission mode information of the resource, as a first logical channel; and transmitting the data carried by the first logical channel by using the resource. Therefore, the data corresponding to the periodic service transmission mode of the UE can be transmitted in a manner of being matched with the resources allocated to the data by the base station, so that the transmission delay of the data is effectively reduced, the transmission reliability is improved, and the utilization efficiency of the resources is improved.
Further, the resource is used for preferentially transmitting the data carried by the first logic channel; after the data carried by the first logical channel is preferentially transmitted, if the resource has a residual part, the residual part of the resource is used for transmitting the data carried by the candidate logical channel except the first logical channel in the at least one candidate logical channel. Therefore, on the premise of ensuring that the data corresponding to the periodic service transmission mode of the UE can be transmitted in a manner of being matched with the resources allocated by the base station to the data, the resources allocated by the base station to the UE are fully utilized to transmit the data as much as possible, so that the overall data transmission effect with low time delay and high reliability is realized.
Drawings
Figure 1 is a schematic diagram of a LCP process of the prior art;
FIG. 2 is a flow chart of a data transmission method of an embodiment of the present invention;
FIG. 3 is a flowchart of one embodiment of step S104 of FIG. 2;
FIG. 4 is a flowchart of one embodiment of step S1042 in FIG. 3;
fig. 5 is a schematic structural diagram of a data transmission device according to an embodiment of the present invention.
Detailed Description
As mentioned in the background art, a base station allocates uplink radio resources based on each User Equipment (per-UE), and it is determined by a UE which radio bearer data can be placed in the radio resources allocated by the base station for the UE for transmission.
For Uplink radio resources (may be simply referred to as resources) allocated by a base station based on an Uplink grant (UL grant), a UE needs to determine a total Data amount of each Logical Channel (LCH) included in a new Media Access Control Protocol Data Unit (MAC PDU), and if necessary, the UE also allocates resources for a Control element (Control element) of the MAC.
In other words, uplink resources allocated to the UE by the base station through the uplink grant are determined. According to the configuration given by the logical channel configuration parameter (logical channel configuration) in the Radio Resource Control (RRC) signaling sent by the base station, in combination with the rule specified by the protocol, the UE can determine which logical channel data to place in the Resource allocated by the base station and how much data to place in each logical channel.
Since there is only one MAC PDU but there are multiple logical channels to be multiplexed, this requires that each logical channel be assigned a priority. The data of the highest priority logical channel is preferentially contained in the MAC PDU, followed by the data of the next highest priority logical channel, and so on, until the allocated MAC PDU is full or there is no more data to send. The priority of each logical channel is determined by a priority field in the logical channel config parameter, and the smaller the value of the field, the higher the priority of the corresponding logical channel.
However, this allocation scheme may cause the high-priority logical channels to always occupy the radio resources allocated to the UE by the base station, thereby causing the low-priority logical channels to be "starved". To avoid this, long Term Evolution (LTE) introduces a concept of Prioritized Bit Rate (PBR), that is, before allocating resources to logical channels, data rates of the logical channels are configured, so as to provide minimum data Rate guarantee for each logical channel and avoid starvation of logical channels with low priority. In practical applications, PBR may be determined by the priority packet rate field in the logistic channel config parameter.
Specifically, the MAC layer of the UE may implement multiplexing of MAC PDUs using an algorithm similar to token bucket (token bucket). The basic idea of the algorithm is to determine whether to transmit data of a certain logical channel based on whether there are tokens in the token bucket and the number of tokens, and to control the amount of data of the logical channel assembled in the MAC PDU.
The Bucket Size Duration (BSD) determines the "depth" of the token Bucket. It, together with PBR, determines the maximum capacity of the token bucket PBR x BSD. The maximum capacity of the token bucket limits the total amount of data that can be suspended (i.e., buffered in a buffer) for each logical channel.
The UE maintains a variable Bj for each logical channel j, where the variable Bj indicates the number of tokens (tokens) currently available in the token bucket, and each token corresponds to 1 bit (Byte) of data. Bj is initialized to 0 when the logical channel is established, and PBR × TTI is added for each Transmission Time Interval (TTI). For example, assuming that the PBR specified by the prioritedbitrate field is kBps8, it indicates that the PBR is 8kBps, i.e., 8kBps × 1ms =8byte tokens are injected into the token bucket every TTI. The value of Bj cannot exceed the maximum capacity of the bucket PBR BSD. Taking BSD =500ms as an example, the maximum capacity of the bucket is 8kbps 500ms =4k Byte.
When there is newly transmitted data, the UE may perform Logical Channel Prioritization (LCP) according to the following steps:
firstly, all logical channels with Bj >0 are packed in descending order of priority, and the radio resource allocated to each logical channel can only meet the requirement of PBR. When the PBR of a logical channel is configured to be infinite ("infinity"), a logical channel with a lower priority than the logical channel is considered only when the resources of the logical channel are satisfied.
Next, the logical channel j is subtracted from Bj to subtract the size of all the MAC service Data units (service Data units, abbreviated as SDUs) multiplexed into the MAC PDU in the previous step. (refer to the implementation: for logical channel j, for each SDU transmitted for a Radio Link Control protocol (RLC), compare if Bj is greater than 0. If Bj is greater than 0, add the SDU to MAC PDU. Then subtract Tsdu from Bj, and determine if PBR requirements are met).
Finally, if the first two steps are executed to have the uplink resources left, the remaining resources are allocated to the logical channels according to the logical channel priority levels regardless of the size of Bj. Only when all the data of the logical channels with high priority are sent and the uplink grant is not exhausted, the logical channels with low priority can be served. That is, at this time, the UE maximizes data transmission of the logical channel of high priority.
For example, referring to fig. 1, assume that there are currently three logical channels (LCH 1, LCH2, and LCH 3) where LCH1 has priority highest at priority 1, LCH2 has priority second at priority 2, and LCH3 has priority lowest at priority 3.
According to the LCP mechanism, when allocating resources to the three logical channels, firstly, PBR-sized resources are allocated to each logical channel according to the priority level. Specifically, step s1 is performed first to put the PBR-sized data carried by the LCH1 into the available resources allocated to the UE by the base station. Then, if there is a remaining part of the available resources, step s2 is performed to put the PBR-sized data carried by the LCH2 into the remaining part of the available resources. Finally, if there is a remaining part of the available resources, step s3 is executed to put the PBR-sized data carried by the LCH3 into the remaining part of the available resources. And if the data stored in the buffer by the logic channel is smaller than the corresponding PBR, putting all the data stored in the buffer into the available resources.
After the steps s1 to s3 are performed, if there is a remaining part of the available resource, the PBR is not considered, and the data transmission of the logical channel satisfying the high priority is prioritized according to the priority of each logical channel.
In particular, with continued reference to fig. 1, after performing said step s3, assuming that there is a remaining portion of said available resources, a step s4 is performed to place the remaining data of the LCH1 of the highest priority among the three logical channels in said remaining portion of available resources. At this point, the available resources are filled to form a MAC PDU for data transmission.
In The Fifth-Generation mobile communication technology (5G) standard, before The LCP mechanism with The above 3 steps is executed, a logical channel Selection (Selection of logical channels) process is added, that is, the UE may select a logical channel meeting The transmission condition according to some scheduling configuration in The uplink grant to perform The subsequent LCP mechanism.
When there is newly transmitted data, the UE may first select a logical channel according to the following steps:
for each uplink grant, a MAC entity (MAC entry) of the UE may select a logical channel that satisfies all the following conditions as a logical channel that can use a resource corresponding to the uplink grant for data transmission.
Condition 1: for each logical channel, if the logical channel is configured with an allowed SubCarrier Spacing (SCS) List (allowed SCS-List) parameter, the value of the allowed SubCarrier Spacing index (allowed SubCarrier Spacing index values) in the allowed SCS-List parameter must contain the SubCarrier Spacing index (allowed SubCarrier Spacing index) indicated by the current uplink grant.
Condition 2: for each logical Channel, if the logical Channel is configured with a maximum Physical Uplink Shared Channel (PUSCH) Duration (maxPUSCH-Duration) parameter, the maxPUSCH-Duration parameter must be greater than or equal to a PUSCH transmission Duration (PUSCH transmission Duration) indicated by the current Uplink grant.
Condition 3: for each logical channel, if the logical channel is Configured with a Grant Type1 (Configured Grant Type1 Allowed) parameter, then if the current previous Grant is a Grant Type1 (Configured Grant Type 1) parameter, the value of the Grant Type1Allowed parameter of the logical channel must be set to Allowed (TRUE).
Condition 4: for each logical channel, if an allowed serving cell list (allowedServingCells) parameter is configured for the logical channel, cell (cell) information in the allowedServingCells parameter includes cell information indicated by a current uplink grant.
The subcarrier spacing index, the PUSCH transmission duration, and the cell information may be included in Uplink transmission information (Uplink transmission information) corresponding to a preset Uplink transmission (scheduled Uplink transmission).
The inventor of the present application has found, through analysis, that according to the existing LCP mechanism (i.e. for an uplink transmission resource corresponding to an uplink grant, first, a logical channel selection procedure is performed, that is, the UE selects a logical channel satisfying a transmission condition according to some scheduling configurations in the uplink grant, and then performs the LCP procedure shown in fig. 1).
For an uplink transmission resource corresponding to a configured grant (configured grant), a plurality of logical channels meeting transmission conditions may be obtained through a selection process of the logical channels, and if the priority of the logical channel corresponding to the periodic service transmission mode corresponding to the configured grant is not the highest among the screened logical channels, after the LCP mechanism is subsequently executed, data of the logical channel may not be completely transmitted or may not be transmitted at all on the current uplink transmission resource.
In other words, according to the existing LCP mechanism, it may happen that data corresponding to the periodic traffic transmission mode cannot be transmitted in match with the resource (configured grant configuration) allocated by the base station for the data, thereby causing a series of problems such as delay and segmentation.
For example, still taking fig. 1 as an example, suppose that LCH1, LCH2, and LCH3 are determined after selection of logical channels, and a logical channel that can be used by the base station for data transmission through the resources (i.e., the available resources shown in the figure) allocated to the UE by the current uplink grant is used, where the data volume carried by LCH1 and LCH2 is still shown in the figure, and the data volume carried by LCH3 is greater than the corresponding PBR.
It is assumed that the available resources are periodic resources allocated to the UE by the base station to match the traffic transmission mode of LCH 3. According to the existing LCP mechanism, the maximum data volume of the available resources that can be actually put into the LCH3 is also only the size of the corresponding PBR, which causes the resources allocated to the data carried by the LCH3 to be "preempted" by other high-priority logical channels, so that the base station cannot exert its maximum effect on the mechanism for allocating resources in a targeted manner for a certain service transmission mode of the UE.
This is contrary to the original intention that the base station configures the uplink configuration resource matched with the UE by using the service transmission mode information reported by the UE, so that the UE can transmit the service in the corresponding service transmission mode by using the resource.
To solve the foregoing technical problem, an embodiment of the present invention provides a data transmission method, including: acquiring transmission mode information of resources; acquiring service transmission mode information of at least one candidate logical channel; determining a candidate logical channel of the at least one candidate logical channel, of which the traffic transmission mode information matches the transmission mode information of the resource, as a first logical channel; and transmitting the data carried by the first logical channel by using the resource.
Therefore, the data corresponding to the periodic service transmission mode of the UE can be transmitted in a manner of being matched with the resources allocated to the data by the base station, so that the transmission delay of the data is effectively reduced, the transmission reliability is improved, and the utilization efficiency of the resources is improved.
In order to make the aforementioned objects, features and advantages of the present invention more comprehensible, embodiments accompanying figures are described in detail below.
Fig. 2 is a flowchart of a data transmission method according to an embodiment of the present invention. The scheme of this embodiment may be applied to a scenario in which a base station allocates resources to a UE, and the resources are configured for data corresponding to a specific service transmission mode reported by the UE, where the service transmission mode has periodicity and the corresponding resources also have periodicity. By adopting the scheme of the embodiment, the data corresponding to the periodic service transmission mode of the UE can be ensured to be transmitted in a manner of being matched with the resource allocated by the base station for the data. The scheme of the present embodiment may be performed by the UE side.
The "transmission mode information" appearing herein means: the characteristic information of the resource configured periodically, and the periodic transmission rule of the resource in the next period of time can be determined through the transmission mode information.
The "traffic transmission mode information" appearing herein means: periodic attribute information of data of the service on transmission. In particular, logical channels may be used to carry and transport at least a portion of the type of data for a service. Alternatively, the logical channels may be used to carry and transmit data of multiple services, and these services may have the same or similar characteristics, such as the same or similar values of parameters included in the service transmission mode information.
Specifically, in this embodiment, referring to fig. 2, the data transmission method may include the following steps:
step S101, acquiring transmission mode information of resources;
step S102, obtaining service transmission mode information of at least one candidate logic channel;
step S103, determining a candidate logical channel in the at least one candidate logical channel, where the service transmission mode information matches with the transmission mode information of the resource, as a first logical channel;
step S104, the data carried by the first logic channel is transmitted by using the resource.
In an embodiment, the resource may be a resource corresponding to a configuration grant (configured grant) of the base station, and has a periodic characteristic, that is, is a resource configured periodically for the UE. The UE may obtain the transmission mode information of the resource according to a message sent by the base station.
In step S101, when the configuration authorization is a configuration authorization Type1 (Configured Grant Type 1), the UE may obtain the transmission mode information of the resource according to the related configuration information in the RRC signaling. For example, the periodicity and physical location information of the resource may be obtained from the RRC signaling.
When the configuration authorization is a configuration authorization Type 2 (Configured Grant Type 2), the UE may obtain the transmission mode Information of the resource according to the related configuration Information of the RRC signaling and an activation signaling in Downlink Control Information (DCI). For example, the periodicity of the resource may be obtained from the RRC signaling, and the physical location information of the resource may be obtained from the DCI.
Further, the transmission mode information of the resource may include parameters selected from the group consisting of: a period of the resource (period), a starting position of the resource (timeDomainOffset), and a size of the resource (TBSize).
In one embodiment, the at least one candidate logical channel may be obtained by performing a selection process of an existing logical channel. Specifically, before the step S102 is executed, the at least one candidate logical channel may be obtained by screening according to the transmission format configuration information associated with the resource.
In an embodiment, the execution sequence of step S101 and step S102 may be interchanged, or both may be executed synchronously.
In one embodiment, for each candidate logical channel, the traffic transmission mode information of the candidate logical channel may be obtained based on the MAC layer of the UE.
For example, the application layer of the UE may notify the MAC layer of the UE of the traffic transmission mode of the candidate logical channel. Alternatively, the core network may notify the MAC layer of the UE of the traffic transmission mode of the candidate logical channel.
For another example, the MAC layer of the UE may determine the traffic transmission mode of the candidate logical channel according to the arrival rule of the data packets.
Further, the traffic transmission mode information of the candidate logical channel may include parameters selected from: the period (period) of the traffic associated with the candidate logical channel, the starting position (fixed offset) of the arrival of the traffic, and the data volume (packet size) of each arrival of the traffic.
In practical applications, the traffic transmission mode information of the candidate logical channels and the transmission mode information of the resources may include other more parameters, so as to obtain more accurate periodicity characteristic information.
In one embodiment, the matching of the traffic transmission mode information of the candidate logical channel and the transmission mode information of the resource means that the periodicity of the data of the traffic of the candidate logical channel is the same as or similar to the periodicity of the resource.
In one embodiment, the step S103 may include: traversing the at least one candidate logical channel, and determining the candidate logical channel in which the matching degree of the service transmission mode information and the transmission mode information of the resource is greater than a preset threshold value as the first logical channel.
For example, the traffic transmission mode information of the candidate logical channel and the transmission mode information of the resource respectively include at least one parameter, and the matching degree refers to consistency of values of the same parameter in the traffic transmission mode information and the transmission mode information.
In an embodiment, for each candidate logical channel, the matching degree between each parameter included in the service transmission mode information of the candidate logical channel and the corresponding parameter included in the transmission mode information of the resource may be sequentially compared; determining the matching degree of the service transmission mode information of the candidate logical channel and the transmission mode information of the resource according to the matching degree of each parameter; and if the matching degree is greater than the preset threshold value, determining the candidate logical channel as the first logical channel.
For example, for each parameter included in the traffic transmission mode information of each candidate logical channel, a deviation between a value of the parameter and a value of the same parameter included in the transmission mode information of the resource is determined, and the matching degree of the parameter is determined according to the deviation. Preferably, the smaller the deviation, the higher the degree of matching.
And after the matching degree of the parameters is determined, the matching degrees of the parameters are added to obtain the matching degree of the service transmission mode information of the candidate logical channel and the transmission mode information of the resource.
If the matching degree obtained by the summation is greater than the preset threshold, the candidate logical channel may be determined as the first logical channel.
Preferably, the maximum value of the matching degree may be 1, and the preset threshold may range from 0.8 to 0.9. In practical applications, a person skilled in the art may adjust the specific value of the preset threshold value as needed.
In one embodiment, the step S103 may be performed by a MAC entity of the UE.
In one embodiment, referring to fig. 3, the step S104 may include the steps of:
step S1041, preferentially transmitting data carried by the first logical channel using the resource;
step S1042, after the data carried by the first logical channel is preferentially transmitted, if the resource has a remaining portion, using the remaining portion of the resource to transmit the data carried by the candidate logical channel except the first logical channel in the at least one candidate logical channel.
In the step S1041, even if the priority of the first logical channel is not the highest among the at least one candidate logical channel, in the scheme of the embodiment, the data carried by the first logical channel can be transmitted by using the resource preferentially (ahead of the candidate logical channel with the highest priority among the at least one candidate logical channel). Therefore, the data corresponding to the periodic service transmission mode of the UE can be transmitted in a manner of matching with the resources allocated to the data by the base station.
In an embodiment, the number of the first logical channels obtained by filtering in step S103 may be multiple, and in step S1041, the UE may put, according to the priorities of the logical channels, data in a buffer corresponding to each first logical channel into a Transport Block (TB) to be transmitted by the resource in sequence from high to low.
In a variation, when the number of the first logical channels obtained by filtering in step S103 is multiple, in step S1041, the UE may put the buffered data corresponding to each first logical channel into the TB to be transmitted according to the existing LCP mechanism, so as to ensure that each first logical channel has at least data with the PBR size and can be transmitted at the first time.
In one embodiment, referring to fig. 4, the step S1042 may include the following steps:
step S10421, determining whether service transmission mode information of a candidate logical channel other than the first logical channel in the at least one candidate logical channel matches transmission mode information of other resources, where the other resources and the resource are both configured by the base station;
step S10422, determining a candidate logical channel in which the service transmission mode information and the transmission mode information of the other resources in the determination result are not matched as a second logical channel;
step S10423, using the remaining part of the resource to transmit the data carried by the second logical channel.
Therefore, on the premise of ensuring that the data corresponding to the periodic service transmission mode of the UE can be transmitted in a manner of being matched with the resources allocated by the base station to the data, the resources allocated by the base station to the UE are fully utilized to transmit the data as much as possible, so that the overall data transmission effect with low time delay and high reliability is realized.
Specifically, the other resources may be other resources, which are configured by the base station to the UE and are transmitted periodically, except for the resources in step S101. For example, the periodicity of the other resources and the periodicity of the resources may be different, and specific values of parameters included in the transmission mode information of the other resources and the periodicity of the resources are different, for example, the matching degree is smaller than the preset threshold.
Still taking the three logical channels shown in fig. 1 as an example, assuming that the LCH3 is determined to be the first logical channel through the steps S101 to S103, in the step S1041, the data in the buffer corresponding to the LCH3 may be preferentially put into the available resources. At this time, if there is a remaining portion of the available resources, the UE may further perform step S10421 to determine whether the traffic transmission mode information of each of the LCHs 1 and LCH2 matches the transmission mode information of the resources allocated by the base station known to the UE.
Assuming that the traffic transmission mode information of the LCH1 matches transmission mode information of another resource (not shown) allocated to the UE by the base station, and the traffic transmission mode information of the LCH2 does not match transmission mode information of all resources allocated to the UE by the base station, the UE may determine the LCH2 as the second logical channel.
Further, in step S10423, the UE may put the data in the buffer corresponding to the LCH2 into the remaining part of the available resources shown in fig. 1 and be located behind the data carried by the LCH 1.
The data in the buffer corresponding to LCH1 is not put into the remainder of the available resources, but transmitted using resources matching LCH 1.
In another variation, the step S1042 may be replaced by: and if the resource has the residual part, not using the residual part of the resource to continue data transmission. That is, in this variation, the resource is only used for transmitting the data carried by the first logical channel.
In an embodiment, the remaining portion may include a hundred percent remaining situation, that is, at the current time, the first logical channel has no data to be transmitted, and the buffer corresponding to the first logical channel has no buffered data. At this time, the resources may all be used for transmitting data carried by a logical channel other than the first logical channel among the at least one candidate logical channel.
In an embodiment, if the matching result in step S103 indicates that the transmission mode information of the resource does not match the service transmission mode information of the at least one candidate logical channel, the number of the first logical channel may be considered to be zero, and at this time, data transmission may be performed according to an existing LCP mechanism.
Therefore, by adopting the scheme of the embodiment, the data corresponding to the periodic service transmission mode of the UE can be transmitted in a manner matched with the resource allocated to the data by the base station, so that the transmission delay of the data is effectively reduced, the transmission reliability is improved, and the utilization efficiency of the resource is improved.
Fig. 5 is a schematic structural diagram of a data transmission device according to an embodiment of the present invention. Those skilled in the art understand that the data transmission device 5 of the present embodiment may be used to implement the method technical solutions described in the embodiments shown in fig. 2 to fig. 4.
Specifically, in this embodiment, the data transmission device 5 may include: a first obtaining module 51, configured to obtain transmission mode information of a resource; a second obtaining module 52, configured to obtain service transmission mode information of at least one candidate logical channel; a determining module 53, configured to determine, as the first logical channel, a candidate logical channel of the at least one candidate logical channel for which the traffic transmission mode information matches the transmission mode information of the resource; a data transmission module 54, configured to transmit the data carried by the first logical channel by using the resource.
In one embodiment, the at least one candidate logical channel is obtained by screening according to the transport format configuration information associated with the resource.
In one embodiment, the determining module 53 may include: the determining sub-module 531 is configured to traverse the at least one candidate logical channel, and determine a candidate logical channel in which a matching degree between the service transmission mode information and the transmission mode information of the resource is greater than a preset threshold as the first logical channel.
In an embodiment, the traffic transmission mode information of the candidate logical channel and the transmission mode information of the resource may respectively include at least one parameter, and the determining sub-module 531 may include: a comparing unit 5311, configured to sequentially compare, for each candidate logical channel, matching degrees of parameters included in the service transmission mode information of the candidate logical channel and corresponding parameters included in the transmission mode information of the resource; a first determining unit 5312, configured to determine, according to the matching degrees of the parameters, the matching degree of the service transmission mode information of the candidate logical channel and the transmission mode information of the resource; the second determining unit 5313 determines the candidate logical channel as the first logical channel if the matching degree is greater than the preset threshold.
In one embodiment, the data transmission module 54 may include: a first data transmission sub-module 541, configured to preferentially transmit data carried by the first logical channel using the resource; and a second data transmission sub-module 542, configured to, after preferentially transmitting the data carried by the first logical channel, if the resource has a remaining portion, transmit the data carried by the candidate logical channel other than the first logical channel in the at least one candidate logical channel using the remaining portion of the resource.
In one embodiment, the second data transmission submodule 542 may include: a determining unit 5421, configured to determine whether service transmission mode information of a candidate logical channel other than the first logical channel in the at least one candidate logical channel matches transmission mode information of other resources, where the other resources and the resource are both configured by a base station; a third determining unit 5422, configured to determine, as the second logical channel, a candidate logical channel in which the service transmission mode information in the determination result does not match the transmission mode information of the other resources; a data transmission unit 5423, configured to transmit data carried by the second logical channel by using the remaining part of the resource.
In one variation, the data transmission module 54 may include: a first data transmission submodule 541, configured to preferentially transmit data carried by the first logical channel by using the resource; and a third data transmission sub-module 543, if there is a remaining part of the resource, not using the remaining part of the resource to continue data transmission.
In one embodiment, the acquiring the transmission mode information of the resource may include: and acquiring the transmission mode information of the resource from the message received from the base station.
In one embodiment, the message of the base station may be selected from: RRC signaling and DCI.
In one embodiment, for each candidate logical channel, the traffic transmission mode information of the candidate logical channel may be obtained based on the MAC layer.
In one embodiment, the transmission mode information of the resource may include parameters selected from: a period of the resource, a starting location of the resource, and a size of the resource.
In one embodiment, the traffic transmission mode information of the candidate logical channel may include parameters selected from: the period of the service associated with the candidate logical channel, the starting position of the arrival of the service, and the data volume of each arrival of the service.
In one embodiment, the resource may be a periodically configured resource.
For more details of the operation principle and the operation mode of the data transmission device 5, reference may be made to the related descriptions in fig. 2 to fig. 4, which are not repeated herein.
Further, the embodiment of the present invention further discloses a storage medium, on which computer instructions are stored, and when the computer instructions are executed, the method technical solutions described in the embodiments shown in fig. 2 to fig. 4 are executed. Preferably, the storage medium may include a computer-readable storage medium such as a non-volatile (non-volatile) memory or a non-transitory (non-transient) memory. The storage medium may include ROM, RAM, magnetic or optical disks, etc.
Further, an embodiment of the present invention further discloses a terminal, which includes a memory and a processor, where the memory stores a computer instruction capable of running on the processor, and the processor executes the method technical solution described in the embodiments shown in fig. 2 to fig. 4 when running the computer instruction. Preferably, the terminal may be a User Equipment (UE).
Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (15)
1. A method of data transmission, comprising:
acquiring transmission mode information of resources;
acquiring service transmission mode information of at least one candidate logical channel, wherein the service transmission mode information refers to: information of periodic attribute of data of the service on transmission, wherein the service transmission mode information of the candidate logical channel includes parameters selected from: the period of the service associated with the candidate logical channel, the initial position of the arrival of the service and the data volume of each arrival of the service;
determining a candidate logical channel of the at least one candidate logical channel, in which the traffic transmission mode information matches the transmission mode information of the resource, as a first logical channel;
and transmitting the data carried by the first logical channel by using the resource.
2. The data transmission method according to claim 1, wherein the at least one candidate logical channel is filtered according to the transport format configuration information associated with the resource.
3. The data transmission method according to claim 1, wherein the determining, as the first logical channel, a candidate logical channel of the at least one candidate logical channel whose traffic transmission mode information matches the transmission mode information of the resource comprises:
and traversing the at least one candidate logical channel, and determining the candidate logical channel in which the matching degree of the service transmission mode information and the transmission mode information of the resource is greater than a preset threshold value as the first logical channel.
4. The data transmission method according to claim 3, wherein the traffic transmission mode information of the candidate logical channels and the transmission mode information of the resource respectively include at least one parameter, and the traversing the at least one candidate logical channel and determining the candidate logical channel in which a matching degree of the traffic transmission mode information and the transmission mode information of the resource is greater than a preset threshold as the first logical channel comprises:
for each candidate logical channel, sequentially comparing the matching degree of each parameter contained in the service transmission mode information of the candidate logical channel with the corresponding parameter contained in the transmission mode information of the resource; determining the matching degree of the service transmission mode information of the candidate logical channel and the transmission mode information of the resource according to the matching degree of each parameter;
and if the matching degree is greater than the preset threshold value, determining the candidate logical channel as the first logical channel.
5. The data transmission method according to claim 1, wherein the transmitting the data carried by the first logical channel using the resource comprises:
preferentially transmitting data carried by the first logical channel by using the resources;
after the data carried by the first logical channel is preferentially transmitted, if the resource has a residual part, the residual part of the resource is used for transmitting the data carried by the candidate logical channel except the first logical channel in the at least one candidate logical channel.
6. The data transmission method according to claim 5, wherein the transmitting data carried by the candidate logical channel other than the first logical channel among the at least one candidate logical channel using the remaining portion of the resource if the remaining portion of the resource exists comprises:
judging whether the service transmission mode information of the candidate logical channel except the first logical channel in the at least one candidate logical channel is matched with the transmission mode information of other resources, wherein the other resources and the resources are configured by a base station;
determining a candidate logical channel in which the service transmission mode information in the judgment result is not matched with the transmission mode information of other resources as a second logical channel;
transmitting data carried by the second logical channel using the remaining portion of the resources.
7. The data transmission method according to claim 1, wherein the transmitting the data carried by the first logical channel using the resource comprises:
preferentially transmitting data carried by the first logical channel by using the resources;
and if the resource has the residual part, not using the residual part of the resource to continue data transmission.
8. The data transmission method according to claim 1, wherein the obtaining the transmission mode information of the resource comprises:
and acquiring the transmission mode information of the resource from the message received from the base station.
9. The data transmission method according to claim 8, wherein the message of the base station is selected from the group consisting of: RRC signaling and DCI.
10. The data transmission method according to claim 1, wherein for each candidate logical channel, the traffic transmission mode information of the candidate logical channel is obtained based on a MAC layer.
11. The data transmission method according to any one of claims 1 to 10, wherein the transmission mode information of the resource includes parameters selected from the group consisting of: a period of the resource, a starting location of the resource, and a size of the resource.
12. The data transmission method according to any one of claims 1 to 10, wherein the resource is a periodically configured resource.
13. A data transmission apparatus, comprising:
the first acquisition module is used for acquiring the transmission mode information of the resource;
a second obtaining module, configured to obtain service transmission mode information of at least one candidate logical channel, where the service transmission mode information refers to: information of periodic attribute of data of the service on transmission, wherein the service transmission mode information of the candidate logical channel includes parameters selected from: the period of the service associated with the candidate logical channel, the initial position of the arrival of the service and the data volume of each arrival of the service;
a determining module, configured to determine, as a first logical channel, a candidate logical channel in the at least one candidate logical channel for which the service transmission mode information matches the transmission mode information of the resource;
and the data transmission module is used for transmitting the data carried by the first logic channel by using the resource.
14. A storage medium having stored thereon computer instructions, which when executed by a processor, perform the steps of the method of any one of claims 1 to 12.
15. A terminal comprising a memory and a processor, the memory having stored thereon computer instructions executable on the processor, wherein the processor, when executing the computer instructions, performs the steps of the method of any one of claims 1 to 12.
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| WO2017049536A1 (en) * | 2015-09-24 | 2017-03-30 | 华为技术有限公司 | Data transmission apparatus, method and system |
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