CN109922525B - Communication-based CBTC (communication based train control) service scheduling method and device - Google Patents
Communication-based CBTC (communication based train control) service scheduling method and device Download PDFInfo
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- CN109922525B CN109922525B CN201711314251.7A CN201711314251A CN109922525B CN 109922525 B CN109922525 B CN 109922525B CN 201711314251 A CN201711314251 A CN 201711314251A CN 109922525 B CN109922525 B CN 109922525B
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Abstract
The invention provides a communication-based train control system CBTC service scheduling method and device. The invention provides a communication-based CBTC service scheduling method of a train control system, which comprises the following steps: the terminal receives a resource allocation message sent by the base station, wherein the resource allocation message is used for indicating the transmission resource of the service, the transmission resource is allocated by the base station according to the service priority, and the priority of the CBTC service is higher than the priority of other services; and the terminal performs CBTC service transmission and/or other service transmission with the base station according to the service transmission resources indicated in the resource allocation message. The communication-based train control system CBTC service scheduling method and device provided by the invention can preferentially ensure the normal transmission of the CBTC service, thereby providing guarantee for the rail transit safety.
Description
Technical Field
The invention relates to a wireless communication technology, in particular to a communication-based train control system CBTC service scheduling method and device.
Background
With the rapid development of Communication technology, especially wireless Communication technology, Communication Based Train Control systems (CBTC) have been developed and widely used. The CBTC communicates through a wireless communication system, complex cables do not need to be laid, and the cost of cable laying and maintenance is reduced; the CBTC can realize the bidirectional communication between the vehicle and the control center, and greatly improves the passing capacity of the train section; the CBTC information transmission flow is large, the efficiency is high, the speed is high, and a mobile automatic block system is easy to realize; the CBTC can adapt to trains of different vehicle types, different vehicle speeds, different transportation volumes and different traction modes, and has strong compatibility; the CBTC can transmit, send and process the information in a centralized way in a classified way, and the working efficiency of the dispatching center can be improved. The CBTC has the advantages, and is widely applied to urban rail transit, such as subways, light rails and the like.
The LTE-M (LTE-Machine-to-Machine, abbreviated as LTE-M) is an advanced wireless communication technology, can meet the requirement of high throughput rate, can reach 100Mbit/s in the downlink of peak rate and 50Mbit/s in the uplink under the condition of 20MHz bandwidth networking, adopts advanced technologies such as Orthogonal Frequency Division Multiplexing (OFDM), Multiple Input Multiple Output (MIMO), Hybrid Automatic Repeat reQuest (HARQ) and the like, effectively improves the data rate, the spectrum efficiency and the anti-interference performance, provides priority scheduling and high-speed mobility support of comprehensive service bearing, and ensures the safe and reliable transmission of wireless data service through an anti-interference technology and a safety mechanism. Therefore, the CBTC system based on LTE-M can solve the disadvantages of the CBTC system based on Wireless Local Area Network (WLAN), and is gradually replacing the CBTC system based on WLAN as the mainstream vehicle-ground communication system.
According to the specification of the LTE-M protocol, the CBTC service and the voice service are deployed on the same QCI1 for bearing, if a large amount of voice services burst, the normal transmission of the CBTC service is affected, and further the public safety of rail transit is threatened.
Disclosure of Invention
The invention provides a communication-based train control system CBTC service scheduling method and device, and aims to solve the problem that the reliability of CBTC service in the prior art cannot be guaranteed, and further the public safety of rail transit is influenced.
In a first aspect, an embodiment of the present invention provides a communication-based train control system CBTC service scheduling method, including: the terminal receives a resource allocation message sent by the base station, wherein the resource allocation message is used for indicating the transmission resource of the service, the transmission resource is allocated by the base station according to the service priority, and the priority of the CBTC service is higher than the priority of other services;
and the terminal performs CBTC service transmission and/or other service transmission with the base station according to the service transmission resource indicated in the resource allocation message.
Further, in a possible implementation manner, before the terminal receives the resource allocation message sent by the base station, the method further includes:
the terminal sends a Buffer Status Report (BSR) to the base station, wherein the buffer status report indicates the logical channel group of which the terminal needs to upload data and the data volume information corresponding to the logical channel group.
Further, in a possible implementation manner, the logical channel group is divided into four channel groups of 0, 1, 2 and 3, where the logical channel group 0 includes QCI5, SRB1 and SRB2 services, the logical channel group 1 includes CBTC services, the logical channel group 2 includes QCI1 services corresponding to voice, and the logical channel group 3 includes all services except the above services.
Further, in a possible implementation manner, the logical channel group is divided into five channel groups of 0, 1, 2, 3 and 4, where logical channel group 0 includes QCI5, SRB1 and SRB2 services, logical channel group 1 includes CBTC services, logical channel group 2 includes QCI1 services corresponding to voice, logical channel group 3 includes QCI2, QCI3 and QCI4 services, and logical channel group 4 includes all services except the aforementioned services.
Further, in a possible implementation manner, the buffer status report indicates that the CBTC service uses a different logical channel from other services.
In a second aspect, an embodiment of the present invention provides a communication-based train control system CBTC service scheduling method, including:
the base station determines the service priority information between the base station and the terminal, and the priority of the CBTC service is higher than the priority of other services;
the base station distributes transmission resources of the services related in the service priority information according to the service priority information;
the base station sends a resource allocation message to the terminal, wherein the resource allocation message is used for indicating the transmission resource of the service related in the service priority information;
and the base station carries out CBTC service transmission and/or other service transmission with the terminal according to the transmission resources of the services indicated in the resource allocation message.
Further, in a possible implementation manner, before the base station determines the priority of the service with the terminal, the method further includes:
the base station receives a buffer status report sent by the terminal, wherein the buffer status report indicates a logical channel group of which the terminal needs to upload data and data volume information corresponding to the logical channel group.
Further, in a possible implementation manner, the base station adjusts the transmission resource of the allocated service according to the data amount information.
Further, in a possible implementation manner, the CBTC service is indicated in the resource allocation message to use a different logical channel from other services.
In a third aspect, an embodiment of the present invention provides a communication-based train control system CBTC service scheduling apparatus, including:
the transceiver is used for receiving a resource allocation message sent by the base station, the resource allocation message is used for indicating the transmission resource of the service, the transmission resource is allocated by the base station according to the service priority, and the priority of the CBTC service is higher than the priority of other services;
and the processor is used for controlling the transceiver and the base station to carry out CBTC service transmission and/or other service transmission according to the transmission resources of the services indicated in the resource allocation message.
Further, in a possible implementation manner, the transceiver is further configured to send a buffer status report to the base station, where the buffer status report indicates a logical channel group to which the terminal needs to upload data, and data amount information corresponding to the logical channel group.
Further, in a possible implementation, the logical channel group is divided into four channel groups of 0, 1, 2 and 3, where logical channel group 0 includes QCI5, SRB1 and SRB2 services, logical channel group 1 includes CBTC services, logical channel group 2 includes QCI1 services corresponding to voice, and logical channel group 3 includes all services except the above services.
Further, in a possible implementation, the logical channel group is divided into five channel groups of 0, 1, 2, 3, and 4, where the logical channel group 0 includes QCI5, SRB1, and SRB2 services, the logical channel group 1 includes CBTC services, the logical channel group 2 includes QCI1 services corresponding to voice, the logical channel group 3 includes QCI2, QCI3, and QCI4 services, and the logical channel group 4 includes all services except the above services.
Further, in a possible implementation manner, the buffer status report indicates that the CBTC service uses a different logical channel from other services.
In a fourth aspect, an embodiment of the present invention provides a communication-based train control system CBTC service scheduling apparatus, including:
the processor is used for determining service priority information between the CBTC and the terminal, and the priority of the CBTC is higher than the priorities of other services;
the processor is also used for distributing the transmission resources of the services related in the service priority information according to the service priority information;
and the transceiver is used for sending a buffer status report to the terminal, the buffer status report carries the logical channel group of the data to be uploaded by the terminal, and the data volume information processor of the logical channel group is also used for controlling the transceiver and the terminal to carry out CBTC service transmission and/or other service transmission according to the transmission resource of the service indicated in the resource allocation message.
Further, in a possible implementation manner, the transceiver is further configured to receive a buffer status report sent by the terminal before the processor determines the service priority information with the terminal, where the buffer status report indicates a logical channel packet to which the terminal needs to upload data, and data volume information corresponding to the logical channel packet.
Further, in a possible implementation manner, the processor is further configured to adjust the transmission resource of the allocated service according to the data amount information.
Further, in a possible implementation manner, the CBTC service is indicated in the resource allocation message to use a different logical channel from other services.
According to the communication-based CBTC service scheduling method and device for the train control system, the priority of the CBTC service is higher than the priority of other services, transmission resources are distributed according to the priority of the services, the transmission resources required by the CBTC service are guaranteed preferentially, normal transmission of the CBTC service is guaranteed, and further guarantee is provided for public safety of rail transit.
Drawings
In order to illustrate the present invention or the technical solutions in the prior art more clearly, the drawings needed to be used in the following or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are some of the present invention, and other drawings can be obtained by those skilled in the art without inventive exercise.
FIG. 1 is a flow chart of an embodiment of a communication-based train control system CBTC service scheduling method of the present invention;
FIG. 2 is a flow chart of another embodiment of a communication-based CBTC service scheduling method of the train control system of the present invention;
FIG. 3 is a flow chart of another embodiment of a communication-based CBTC service scheduling method of the train control system of the present invention;
FIG. 4 is a flow chart of another embodiment of a communication-based CBTC traffic scheduling method of the present invention;
FIG. 5 is a flow chart of another embodiment of a communication-based CBTC service scheduling method of the present invention;
fig. 6 is a schematic structural diagram of an embodiment of a communication-based train control system CBTC service scheduling apparatus according to the present invention;
fig. 7 is a schematic structural diagram of a communication-based train control system CBTC service scheduling apparatus according to another embodiment of the present invention.
Detailed Description
To make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is obvious that the present invention is described in part, but not in whole. All others that would be obvious to one of ordinary skill in the art based on the teachings herein, are within the scope of the present invention.
Fig. 1 is a flowchart of an embodiment of a communication-based train control system CBTC service scheduling method according to the present invention. The execution main body of the embodiment is terminal equipment, including but not limited to a mobile terminal, a fixed terminal, and a vehicle-mounted terminal with a CBTC service function. As shown in fig. 1, the communication-based train control system CBTC service scheduling method provided in this embodiment includes the following steps:
step 101: the terminal receives a resource allocation message sent by the base station, the resource allocation message is used for indicating the transmission resource of the service, the transmission resource is allocated by the base station according to the service priority, and the priority of the CBTC service is higher than the priority of other services.
For downlink services, the base station determines the priority of various services according to the downlink scheduling priority corresponding to the downlink services to be sent to the terminal. The CBTC service has a higher priority than other services, for example: higher than the priority of voice traffic. The base station allocates transmission resources for the service according to the priority of the service, and the service with the higher priority enjoys the right of allocating transmission resources preferentially, so that the priority of the CBTC service needs to be set higher than the priorities of other services in order to ensure that the CBTC service is not affected by other services and ensure the normal transmission of the CBTC service. For example, when the priority of the CBTC service is higher than that of the voice service, the impact of a large amount of burst voice service on the CBTC service can be avoided. For the uplink service, the terminal determines various service priorities according to the type of the uplink service to be sent, and informs the base station. After the base station distributes transmission resources for the corresponding services according to the priority of each service, the base station informs the terminal bearing the corresponding services through the resource distribution message so that the terminal sends uplink service data on the corresponding resources or receives downlink service data. The resource allocation message may be transmitted in various manners, such as: the transfer may be through downlink control information.
The transmission resource may be various resources used for transmission between the terminal and the base station, including resources such as a shared channel and a control channel. For example: taking downlink service as an example, the resource may be a physical downlink shared channel, a physical downlink control channel, or the like.
Step 102: and the terminal performs CBTC service transmission and/or other service transmission with the base station according to the service transmission resources indicated in the resource allocation message.
After receiving the resource allocation message, the terminal performs transmission of related services with the base station according to the transmission resources indicated in the message, sends service data on corresponding uplink transmission resources, and receives data on downlink transmission resources.
In the communication-based train control system CBTC service scheduling method provided in this embodiment, the terminal performs related service transmission with the base station by receiving the resource allocation message and according to the transmission resource indicated in the message, and since the base station allocates the transmission resource for the service according to the priority of the service, the priority of the CBTC service is higher than the priorities of other services, the transmission resource required by the CBTC service is preferentially ensured, the normal transmission of the CBTC service is ensured, and further, the guarantee is provided for the public safety of rail transit.
Fig. 2 is a flowchart of another embodiment of a communication-based CBTC service scheduling method for a train control system according to the present invention. The communication-based train control system CBTC service scheduling method provided by the embodiment can be used for uplink communication. As shown in fig. 2, before step 101, the method provided in this embodiment may further include:
step 100: the terminal sends a Buffer Status Report (BSR) to the base station, wherein the buffer status report indicates the logical channel group of which the terminal needs to upload data and the data volume information corresponding to the logical channel group.
When the terminal has uplink data to send to the base station, the terminal determines the service type according to the uplink data to be sent, determines the corresponding logic channel grouping according to the service type, and sends the logic channel grouping and the corresponding data volume information to the base station through the buffer status report.
In one possible implementation, the logical channel group is divided into four channel groups of 0, 1, 2 and 3, where logical channel group 0 includes QCI5, SRB1 and SRB2 services, logical channel group 1 includes CBTC services, logical channel group 2 includes QCI1 services corresponding to voice, and logical channel group 3 includes all services except the above services;
alternatively, the first and second electrodes may be,
the logical channel group is divided into five channel groups of 0, 1, 2, 3 and 4, wherein the logical channel group 0 includes QCI5, SRB1 and SRB2 services, the logical channel group 1 includes CBTC services, the logical channel group 2 includes QCI1 services corresponding to voice, the logical channel group 3 includes QCI2, QCI3 and QCI4 services, and the logical channel group 4 includes all services except the above services.
The buffer status report in the above embodiments indicates that the CBTC service uses a different logical channel from other services.
In the communication-based train control system CBTC service scheduling method provided in this embodiment, the terminal sends the buffer status report carrying the service data logical channel packet to be sent to the base station, so that the base station preferentially allocates transmission resources to the CBTC service with a higher priority, preferentially ensures the transmission resources required by the CBTC service, ensures the normal transmission of the CBTC service, and further provides guarantee for the public safety of rail transit; the data volume information of the service is indicated through the buffer status report, so that the base station adjusts the distribution of the transmission resources according to the data volume information of the service, the transmission of the service is ensured, and the utilization rate of the transmission resources is improved.
Fig. 3 is a flowchart of another embodiment of a communication-based CBTC service scheduling method for a train control system according to the present invention. The main execution body of the embodiment is a base station. As shown in fig. 3, the communication-based train control system CBTC service scheduling method provided in this embodiment includes the following steps:
For downlink services, the base station determines the priority of various services according to the downlink scheduling priority corresponding to the downlink services to be sent to the terminal. The CBTC service has a higher priority than other services, for example: higher than the priority of voice traffic. For the uplink service, the base station may determine the priority of the uplink service to be sent to the base station by the terminal through an indication message carrying service type or service priority information sent by the terminal, where the priority information of the CBTC service is higher than the priorities of other services.
And the base station allocates transmission resources for the service according to the priority information of the service, and particularly, the service with high priority allocates the transmission resources preferentially. And the transmission of the service with high priority is preferentially ensured, and the transmission resource is allocated to the service with lower priority only after the transmission of the service with high priority is finished or the transmission resource is allocated to the service with high priority.
The transmission resource may be various resources used for transmission between the terminal and the base station, including resources such as a shared channel and a control channel. For example: taking downlink service as an example, the downlink service can be resources such as a physical downlink shared channel, a physical downlink control channel and the like; taking the uplink service as an example, the resource may be a physical uplink shared channel, a physical uplink control channel, or the like.
And after the base station allocates the transmission resources for the service, the base station sends a resource allocation message to the terminal and informs the terminal of the allocated transmission resources. The resource allocation message may be delivered in various ways, such as by downlink control information.
And step 304, the base station performs CBTC service transmission and/or other service transmission with the terminal according to the transmission resource of the service indicated in the resource allocation message.
And the base station transmits the related service with the terminal according to the transmission resource indicated by the resource allocation message, transmits service data on the corresponding downlink transmission resource and receives the data on the uplink transmission resource.
In the communication-based train control system CBTC service scheduling method provided in this embodiment, the base station determines that the CBTC service priority with the terminal is higher than the priority of other services, preferentially allocates transmission resources to the CBTC service with the higher priority, and notifies the corresponding terminal of the allocated transmission resources through the resource allocation message, thereby preferentially ensuring normal transmission of the CBTC service between the base station and the terminal, and ensuring track traffic safety.
Fig. 4 is a flowchart of a communication-based train control system CBTC service scheduling method according to another embodiment of the present invention. The communication-based train control system CBTC service scheduling method provided by the embodiment can be used for uplink communication. As shown in fig. 4, before step 301, the method provided in this embodiment further includes:
In one possible implementation, the base station adjusts the transmission resources of the allocated service according to the data volume information of the service. For example, when the buffer status report received by the base station indicates that the terminal has a large amount of service data to send to the base station, the base station may increase resources for transmitting the service; when the buffer status report received by the base station indicates that the amount of the service data to be sent to the base station by the terminal is small, the base station may reduce resources for transmitting the service.
The resource allocation message in the foregoing embodiments may also indicate that the CBTC service uses a different logical channel from other services.
Fig. 5 is a flowchart of another embodiment of a communication-based CBTC service scheduling method for a train control system according to the present invention. The embodiment provides a process for a terminal to interactively complete CBTC service scheduling with a base station side, and the embodiment is described by taking uplink scheduling as an example, and specifically includes:
step 501, a terminal sends an indication message to a base station, wherein the indication message carries service priority information of an uplink service, and the service priority information indicates that the priority of a CBTC service is higher than the priorities of other services; in this embodiment, the CBTC service and the voice service are carried by different QoS Class identifiers (QCI for short). Specifically, the CBTC service is carried through CBTC-QCI1, and corresponds to logical channel group 1; voice traffic is carried over the voice-QCI 1, corresponding to logical channel packet 2.
When uplink data needs to be sent to the base station, the terminal may send, to the base station, indication information carrying corresponding service priority information, for example, the indication information may include a Buffer Status Report (BSR) corresponding to a data service type, so that the base station performs uplink scheduling priority management according to the BSR.
In a possible implementation manner, when uplink data to be sent by the terminal belongs to CBTC service data, the indication information sent by the terminal to the base station may include a BSR1 corresponding to logical channel group 1, so as to trigger the base station to perform priority management of the uplink service; when the uplink data to be transmitted by the terminal belongs to voice service data, the BSR2 corresponding to logical channel group 2 may be included in the indication information transmitted by the terminal to the base station, so as to trigger the base station to perform priority management of the uplink service. The BSR1 has a higher priority than the BSR2, thereby ensuring that CBTC traffic has a higher priority than voice traffic. The field value filled in the BSR represents how much data is to be transmitted.
The present embodiment provides a mapping relationship between two different logical channel types, logical channel grouping and buffer status report, as shown in table 1 and table 2, respectively. The SRB indicates a Signaling Radio Bearer (SRB), the Non-gbr indicates a Non-Guaranteed Bit Rate (Non-Guaranteed Bit Rate), and the logical channel types QCI 6-QCI 9 are shown in this embodiment. The priorities of BSRO-BSR 4 range from high to low.
TABLE 1
| Logical channel type | Logical channel grouping | Buffer status reporting |
| QCI5 and SRB1, SRB2 | 0 | BSR0 |
| CBTC-QCI1 | 1 | BSR1 |
| Speech-QCI 1 | 2 | BSR2 |
| QCI2～QCI4 | 3 | BSR3 |
| NonGBR and extended QCI (QCI 10-QCI 254) | 3 | BSR3 |
TABLE 2
| Logical channel type | Logical channel grouping | Buffer status reporting |
| QCI5 and SRB1, SRB2 | 0 | BSR0 |
| CBTC-QCI1 | 1 | BSR1 |
| Speech-QCI 1 | 2 | BSR2 |
| QCI2～QCI4 | 3 | BSR3 |
| QCI6～QCI9 | 4 | BSR4 |
| Expansion QCI (QCI 10-QCI 254) | 4 | BSR4 |
Step 502, the base station determines the service priority information between the base station and the terminal according to the indication message;
when the indication message sent by the terminal and received by the base station includes the BSR, the base station may determine the priority information of the uplink service according to the mapping relationship between the BSR and the service. For example, according to the mapping relationship shown in table 1 and/or table 2, when the BSR1 is included in the indication message, the base station may determine that the terminal has CBTC service to upload, and when the BSR2 is included in the indication message, the base station may determine that the terminal has voice service to upload. Since the priorities of the BSRs 0-4 range from high to low, priority information of CBTC traffic and voice traffic can be determined.
Step 503, the base station allocates the transmission resource of the uplink service related in the service priority information according to the service priority information.
The base station uplink scheduling system preferentially allocates resources of an empty port Physical Downlink Shared Channel (PDSCH) and a Physical Downlink Control Channel (PDCCH) to an uplink CBTC service with a higher priority, and allocates the remaining resources to an uplink voice service with a lower priority after all uplink CBTC services are scheduled.
If the indication message also carries information of the amount of data to be sent, for example, the field value filled in the BSR represents how much of the amount of data to be sent. The base station uplink scheduling system may allocate transmission resources to the corresponding service according to the size of the data amount indicated in the indication message.
Step 504, the base station sends a resource allocation message to the terminal, where the resource allocation message is used to indicate transmission resources of the service related in the service priority information.
And 505, the terminal sends the CBTC uplink service and/or other uplink services to the base station according to the transmission resource of the service indicated in the resource allocation message.
The CBTC service scheduling is described in detail by taking uplink scheduling as an example, the priority of the uplink service is determined by the terminal and then reported to the base station, and the base station determines the service priority and performs uplink resource allocation by using the message reported by the terminal. For downlink scheduling, the priority of downlink traffic is determined by the base station. And the base station downlink scheduling system allocates transmission resources for the downlink service according to the downlink scheduling priority corresponding to the downlink service. The downlink scheduling priority generally includes two parts: a high special priority and a low basic priority. The basic priority is the priority obtained by calculating the service according to a certain strategy, and the basic priority is characterized by the scheduling order of the service under the normal condition; the special priority is a special bit set if the scheduling precedence of a certain type of service is to be specifically improved under certain special conditions.
In an optional implementation manner, a CBTC flag bit is added to a special priority of a downlink scheduling priority, and if the current service is a CBTC service, the CBTC flag bit is set, so as to ensure that the priority of the CBTC service is higher than that of a voice service. The downlink scheduling system preferentially schedules high-priority services, and the base station can preferentially allocate air-interface PDSCH and PDCCH resources to the CBTC services by setting the special-priority CBTC flag bit, so that the reliability of the CBTC services is preferentially ensured.
In the communication-based train control system CBTC service scheduling method provided in this embodiment, for uplink scheduling, a terminal sends a BSR carrying information indicating a service priority to a base station, where the priority of the CBTC service is higher than the priority of other services such as voice, so that the scheduling system preferentially allocates air interface transmission resources to the CBTC service, thereby ensuring normal transmission of the CBTC service and further providing guarantee for public safety of rail transit.
Fig. 6 is a schematic structural diagram of an embodiment of a communication-based train control system CBTC service scheduling apparatus according to the present invention. As shown in fig. 6, the communication-based train control system CBTC service scheduling apparatus 60 provided in this embodiment includes: a transceiver 601, a processor 602, and a bus 603.
The transceiver 601 is configured to receive a resource allocation message sent by a base station, where the resource allocation message is used to indicate transmission resources of a service, the transmission resources are allocated by the base station according to service priorities, and the priority of a CBTC service is higher than the priorities of other services.
A processor 602, configured to perform CBTC service transmission and/or other service transmission with the base station according to the transmission resource of the service indicated in the resource allocation message.
The bus 603 is used for connecting the components.
The apparatus of this embodiment may be used to implement the technical solution of the method embodiment shown in fig. 1, and the implementation principle and the technical effect are similar, which are not described herein again.
On the basis of the foregoing device embodiment, the transceiver 601 in the communication-based train control system CBTC service scheduling apparatus provided in this embodiment is further configured to send a buffer status report to the base station, where the buffer status report indicates a logical channel packet to which the terminal needs to upload data, and data amount information corresponding to the logical channel packet.
The apparatus of this embodiment may be used to implement the technical solution of the method embodiment shown in fig. 2, and the implementation principle and the technical effect are similar, which are not described herein again.
In one possible implementation, the logical channel group is divided into four channel groups of 0, 1, 2 and 3, where logical channel group 0 includes QCI5, SRB1 and SRB2 services, logical channel group 1 includes CBTC services, logical channel group 2 includes QCI1 services corresponding to voice, and logical channel group 3 includes all services except the above services;
alternatively, the first and second electrodes may be,
the logical channel group is divided into five channel groups of 0, 1, 2, 3 and 4, wherein the logical channel group 0 includes QCI5, SRB1 and SRB2 services, the logical channel group 1 includes CBTC services, the logical channel group 2 includes QCI1 services corresponding to voice, the logical channel group 3 includes QCI2, QCI3 and QCI4 services, and the logical channel group 4 includes all services except the above services.
In one possible implementation, the buffer status report indicates that the CBTC service uses a different logical channel than other services.
Fig. 7 is a schematic structural diagram of a communication-based train control system CBTC service scheduling apparatus according to another embodiment of the present invention. As shown in fig. 7, the communication-based train control system CBTC service scheduling apparatus 70 provided in this embodiment includes: a processor 701, a transceiver 702, and a bus 703.
The processor 701 is configured to determine service priority information between the terminal and the CBTC service, where the priority of the CBTC service is higher than the priorities of other services, and is further configured to allocate transmission resources of services related to the service priority information according to the service priority information.
A transceiver 702, configured to send a resource allocation message to the terminal, where the resource allocation message is used to indicate transmission resources of a service involved in the service priority information.
The processor 701 is further configured to control the transceiver 701 and the terminal to perform CBTC service transmission and/or other service transmission according to the transmission resource of the service indicated in the resource allocation message.
The apparatus of this embodiment may be used to implement the technical solution of the method embodiment shown in fig. 3, and the implementation principle and the technical effect are similar, which are not described herein again.
On the basis of the foregoing embodiment, the transceiver 702 in the communication-based train control system CBTC service scheduling apparatus provided in this embodiment is further configured to receive a buffer status report sent by the terminal before the processor 701 determines the service priority information with the terminal, where the buffer status report indicates a logical channel packet in which the terminal needs to upload data, and data volume information corresponding to the logical channel packet.
The apparatus of this embodiment may be used to implement the technical solution of the method embodiment shown in fig. 4, and the implementation principle and the technical effect are similar, which are not described herein again.
In a possible implementation, the processor 701 is further configured to adjust the transmission resource of the allocated service according to the data amount information of the service.
In one possible implementation, the resource allocation message further indicates that the CBTC service uses a different logical channel than other services.
In the several embodiments provided in the present application, it should be understood that the disclosed method and apparatus may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, a division of modules is merely a division of logical functions, and an actual implementation may have another division, for example, a plurality of modules or components may be combined or integrated into another system, or some features may be omitted, or not executed.
Those of ordinary skill in the art will understand that: all or a portion of the steps of the methods described above may be performed by hardware associated with program instructions. The program may be stored in a computer-readable storage medium. When the program is executed, the program executes the steps of the methods; and the aforementioned storage medium includes: various media that can store program codes, such as ROM, RAM, magnetic or optical disks.
Finally, it should be noted that: the above embodiments are only intended to illustrate the technical solution of the present invention, and not to limit the same; although the invention has been described in detail with reference to the foregoing aspects, those skilled in the art will appreciate that: the technical solutions described above may still be modified, or some or all of the technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the present invention.
Claims (8)
1. A communication-based train control system CBTC service scheduling method is characterized by comprising the following steps:
the method comprises the steps that a terminal sends indication information carrying service priority information of uplink service to a base station, wherein the indication information comprises a first Buffer Status Report (BSR) corresponding to a Communication Based Train Control (CBTC) service, and the first BSR indicates a first logic channel group of which the terminal needs to upload data and first data volume information corresponding to the first logic channel group; the first BSR is used for the base station to determine that the terminal needs to upload the CBTC service and determine that the priority of the CBTC service is higher than the priority of other uplink services; the CBTC service and other uplink services use different logic channels; the first data volume information is used for the base station to adjust the size of the transmission resource allocated to the CBTC service;
a terminal receives a resource allocation message sent by a base station, wherein the resource allocation message is used for indicating transmission resources of an uplink service, and the transmission resources are allocated by the base station according to the priority of the uplink service; the transmission resource of the uplink service comprises the transmission resource of the CBTC service, or comprises the transmission resource of the CBTC service and the transmission resources of other uplink services;
the terminal performs CBTC service transmission with the base station according to the transmission resource of the service indicated in the resource allocation message, or performs CBTC service transmission and other service transmission with the base station;
wherein, the BSRs correspond to the logical channels one to one.
2. The method of claim 1, wherein the logical channel group is divided into four channel groups of 0, 1, 2 and 3, wherein the logical channel group 0 includes QCI5, SRB1 and SRB2 services, the logical channel group 1 includes CBTC services, the logical channel group 2 includes QCI1 services corresponding to voice, and the logical channel group 3 includes all services except the aforementioned services;
the logical channel group 1 is the first logical channel group.
3. The method of claim 1, wherein the logical channel group is divided into five channel groups of 0, 1, 2, 3, 4, wherein the logical channel group 0 includes QCI5, SRB1 and SRB2 traffic, the logical channel group 1 includes CBTC traffic, the logical channel group 2 includes QCI1 traffic corresponding to voice, the logical channel group 3 includes QCI2, QCI3 and QCI4 traffic, and the logical channel group 4 includes all traffic except the traffic;
the logical channel group 1 is the first logical channel group.
4. A communication-based CBTC service scheduling method of a train control system is characterized by comprising the following steps:
a base station receives indication information which is sent by a terminal and carries service priority information of an uplink service, wherein the indication information comprises a first Buffer Status Report (BSR) corresponding to a CBTC service, and the first BSR indicates a first logic channel group of which the terminal needs to upload data and first data volume information corresponding to the first logic channel group;
the base station determines that the terminal needs to upload the CBTC service according to the first BSR;
the base station determines that the priority of the CBTC service is higher than the priority of other uplink services according to the priority information of the BSR and the first BSR; the CBTC service and other uplink services use different logic channels;
the base station distributes transmission resources of the uplink service related in the priority information according to the priority information of the uplink service; the transmission resource of the uplink service comprises the transmission resource of the CBTC service, or comprises the transmission resource of the CBTC service and the transmission resources of other uplink services;
the base station sends a resource allocation message to the terminal, wherein the resource allocation message is used for indicating the transmission resource of the uplink service;
the base station performs CBTC service transmission with the terminal according to the transmission resource of the service indicated in the resource allocation message, or performs CBTC service transmission and other service transmission with the terminal;
the method further comprises the following steps: the base station adjusts the size of the transmission resource of the CBTC service according to the first data volume information;
wherein, the BSR corresponds to the logic channel grouping one by one.
5. A communication-based train control system CBTC service scheduling device is characterized by comprising:
the system comprises a transceiver and a base station, wherein the transceiver is used for sending indication information carrying service priority information of uplink service to the base station, the indication information comprises a first Buffer Status Report (BSR) corresponding to a CBTC service, and the first BSR indicates a first logic channel group of which a terminal needs to upload data and first data volume information corresponding to the first logic channel group; the first BSR is used for the base station to determine that the terminal needs to upload the CBTC service and determine that the priority of the CBTC service is higher than the priority of other uplink services; the CBTC service and other uplink services use different logic channels; the first data volume information is used for the base station to adjust the size of the transmission resource allocated to the CBTC service;
the transceiver is further configured to receive a resource allocation message sent by a base station, where the resource allocation message is used to indicate a transmission resource of an uplink service, and the transmission resource is allocated by the base station according to a priority of the uplink service; the transmission resource of the uplink service comprises the transmission resource of the CBTC service, or comprises the transmission resource of the CBTC service and the transmission resources of other uplink services;
a processor, configured to control the transceiver to perform CBTC service transmission with the base station according to the transmission resource of the service indicated in the resource allocation message, or perform CBTC service transmission and transmission of other services with the base station;
wherein, the BSRs correspond to the logical channel groups one to one.
6. The apparatus of claim 5, wherein the logical channel group is divided into four channel groups of 0, 1, 2, and 3, wherein the logical channel group 0 includes QCI5, SRB1, and SRB2 services, the logical channel group 1 includes CBTC services, the logical channel group 2 includes QCI1 services corresponding to voice, and the logical channel group 3 includes all services except the aforementioned services;
the logical channel group 1 is the first logical channel group.
7. The apparatus of claim 5, wherein the logical channel group is divided into five channel groups of 0, 1, 2, 3 and 4, wherein logical channel group 0 comprises QCI5, SRB1 and SRB2 traffic, logical channel group 1 comprises CBTC traffic, logical channel group 2 comprises QCI1 traffic for voice, logical channel group 3 comprises QCI2, QCI3 and QCI4 traffic, and logical channel group 4 comprises all traffic except the traffic;
the logical channel group 1 is the first logical channel group.
8. A communication-based train control system CBTC service scheduling device is characterized by comprising:
the system comprises a transceiver and a receiver, wherein the transceiver is used for receiving indication information which is sent by a terminal and carries service priority information of an uplink service, the indication information comprises a first Buffer Status Report (BSR) corresponding to a CBTC service, and the first BSR indicates a first logic channel group of which the terminal needs to upload data and first data volume information corresponding to the first logic channel group;
the processor is used for determining that the terminal needs to upload the CBTC service according to the first BSR; determining that the priority of the CBTC is higher than the priority of other uplink services according to the priority information of the BSR and the first BSR; the CBTC service and other uplink services use different logic channels;
the processor is further configured to allocate transmission resources of the uplink service related in the priority information according to the priority information of the uplink service; the transmission resource of the uplink service comprises the transmission resource of the CBTC service, or comprises the transmission resource of the CBTC service and the transmission resources of other uplink services;
the transceiver is further configured to send a resource allocation message to the terminal, where the resource allocation message is used to indicate a transmission resource of an uplink service;
the processor is further configured to control the transceiver to perform CBTC service transmission with the terminal according to the transmission resource of the service indicated in the resource allocation message, or perform CBTC service transmission with the terminal and other services;
the processor is further configured to adjust the size of a transmission resource of the CBTC service according to the first data amount information;
wherein, the BSRs correspond to the logical channel groups one to one.
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| CN110933699B (en) * | 2019-12-14 | 2023-04-07 | 国网陕西省电力公司信息通信公司 | Packet forwarding method and device |
| CN113597002B (en) * | 2020-04-30 | 2023-10-20 | 维沃移动通信有限公司 | Downlink receiving triggering method, terminal and network equipment |
| CN112566268B (en) * | 2020-12-23 | 2022-11-08 | 中国人民解放军军事科学院战争研究院 | Resource allocation scheduling method in high-speed mobile environment |
| CN114615715B (en) * | 2022-02-25 | 2023-08-22 | 北京邮电大学 | Base station switching method based on user service under high-speed movement and related equipment |
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