CN108347315B - A multi-subband service scheduling method in a power wireless private network - Google Patents

Abstract

The invention provides a multi-subband service scheduling method in a power wireless private network. Classify and judge the services of the current user. For services with transmission rate requirements, determine the number of idle subbands allocated to the current user according to the current channel quality. For services without transmission rate requirements, according to the resource usage of the wireless communication system and the user The capability determines the number of idle subbands allocated for the current user, flexibly utilizes transmission resources for different service types, reduces data accumulation, avoids user disconnection, and improves the transmission efficiency of the wireless communication system.

Description

A multi-subband service scheduling method in a power wireless private network

technical field

The invention relates to the field of communication technologies, in particular to a multi-subband service scheduling method in a power wireless private network.

Background technique

In the field of communication technology, the current feasible technical solutions for power wireless broadband transmission include TD-LTE230 and TD-LTE1800. Among them, TD-LTE230 is based on TD-LTD technology, combined with spectrum sensing, carrier aggregation, interference demodulation, software radio and other advanced technologies, using the power industry discrete spectrum resources in the 230MHz frequency band to innovate and develop a wireless communication system.

For the types of services supported by LTE230: voice services, video services, load control services, data collection services, and distribution network automation services.

In order to save control channel overhead, semi-persistent scheduling is used for uplink and downlink scheduling, that is, after one scheduling, resources in subsequent time are completely allocated to a user until the user's uplink or downlink data transmission is completed. The completion of uplink data transmission is realized by the method of reporting the BSR by the UE, wherein the BSR with the indicated number of zero is called the Ending BSR. When the base station side judges that it receives several Ending BSRs continuously according to the service type, it considers that the data transmission is over, and starts the scheduling of the next user. For different services, the number of Ending BSRs is set separately. Usually, the data collection service is set to 5, and the video service is set to 10. These values can be configured.

The current multi-subband scheduling scheme is to map the transmission rate to fixed subbands according to the GBR (Guaranteed Bit Rate). Subband.

In the prior art, for a UE that can support multiple subbands, the ENB uses the number of subscribed subbands to schedule the UE, and does not change the number of subbands in one data transmission.

For load control services, data collection services and distribution network automation services, these services have no concept of transmission rate, and the amount of data transmitted each time is at least dozens of bytes and at most about one kilobyte. When there are a large number of UEs performing data transmission in a cell at the same time, if it is required to use the UE's subscription subband for resource allocation, it is very likely that resources cannot be allocated. In this way, the UE may not be scheduled for a long time, and the application layer may Retransmissions will be initiated, resulting in more data accumulation. In a more serious case, the UE will be disconnected and services will fail.

For video and voice services, these services have GBR rate requirements. When the channel conditions are good, a higher-order modulation and coding method can be selected, and the transmission efficiency of subbands is increased, and the transmission requirements can be met by using fewer subbands. During transmission, resource allocation cannot be dynamically adjusted according to channel quality, resulting in waste of resources.

Aiming at the problems existing in the above services, the present invention provides a multi-subband service scheduling method in a power wireless private network, which can make full use of transmission resources, improve system transmission efficiency, reduce data accumulation, and avoid UE disconnection.

SUMMARY OF THE INVENTION

The invention provides a multi-subband service scheduling method in a power wireless private network, which can flexibly utilize transmission resources, reduce data accumulation, avoid user disconnection, and improve the transmission efficiency of a wireless communication system.

The present invention provides a multi-subband service scheduling method in a power wireless private network, characterized in that the method includes the following steps:

a00. Determine whether the current service of the current user has a requirement for the transmission rate. If the current service of the current user is the first type of service that has the rate requirement, execute a11; if the current service of the current user is the second type of service that does not have the rate requirement Class business, execute a21;

a11. Determine whether the wireless communication system can accept the current first type of service according to the transmission capability of the wireless communication system, if so, execute a12, otherwise execute a31;

a12. Determine the number of idle subbands allocated for the current user according to the current channel quality, and then execute a13;

a13, judge whether there is a continuous idle subband that is the same as the number of idle subbands determined for the first type of service, if so, execute a32, otherwise execute a31;

a21. Determine the number of idle subbands allocated for the current user according to the resource usage of the wireless communication system and the user capability, and then execute a22;

a22, determine whether there is currently a continuous idle sub-band that is the same as the number of idle sub-bands determined for the second type of service, if so, execute a32, otherwise execute a23;

a23, determine whether the number of idle sub-bands determined for the second type of service is the lowest level of the preset number of sub-bands, if so, execute a31, otherwise execute a24;

a24, lowering the number of idle subbands determined for the second type of service by one step, and substituting the number of idle subbands lowered by one step and returning to a22 for re-judgment;

a31. Use the subband resource preemption process to allocate a subband to the current user, and then end the current process;

a32. Allocate a certain number of consecutive free subbands to the current user, and then end the current process.

Optionally, the determining the number of idle subbands allocated to the current user according to the current channel quality includes: determining the number of subbands allocated to the current user according to the guaranteed bit rate GBR and the current modulation and coding scheme.

Optionally, the a21 determines the number of idle subbands allocated to the current user according to the minimum of the total number of currently available idle subbands and the number of subscribed subbands of the current user.

Optionally, the a21 utilizes the following formula to determine the number of idle subbands allocated for the current user:

Among them, S is the number of idle subbands allocated for the current user, Δ is the number of users who initiate service transmission within the duration of the second type of service; Z is the number of idle subbands of the wireless communication system; N is the current need to allocate resources The number of users; the Func function represents the number of sub-bands rounded down to each gear; A is the number of sub-bands signed by the current user.

Optionally, the number of gear sub-bands includes 1, 4, 9, 19, and 39.

Optionally, the wireless communication system is an LTE230 system.

Optionally, the first type of services includes video services and voice services.

Optionally, the second type of service includes load control service, data collection service and distribution network automation service.

Description of drawings

FIG. 1 is a schematic flowchart of a method in a specific embodiment of the present invention.

Detailed ways

In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

In a specific embodiment of the present invention, the wireless communication system is a TD-LTE230 system based on the TD-LTE technology, and the present invention will be described in detail below with reference to the accompanying drawings.

In the prior art, for the load control service, data collection service and distribution network automation service, when the user's subscription sub-band is used for resource allocation, there may be a problem that resources cannot be allocated, resulting in data accumulation; That is to say, in one transmission of multi-subband users, resource allocation cannot be adjusted according to channel quality, which easily leads to waste of resources. In view of the above problems, the present invention provides a method for scheduling multi-subband services in a power wireless private network. By distinguishing the types of services, and allocating subband resources for different services, the resources when using subscription subbands for resource allocation are avoided. waste, fully improve the utilization rate of transmission resources, and improve the transmission efficiency of the system.

The present invention will be described in detail below with reference to FIG. 1 , wherein FIG. 1 is a schematic flowchart of a method in a specific embodiment of the present invention.

As shown in FIG. 1 , the present invention provides a multi-subband service scheduling method in a power wireless private network, and the method includes the following steps:

a00. Determine whether the current service of the current user has a requirement for the transmission rate. If the current service of the current user is the first type of service that has the rate requirement, execute a11; if the current service of the current user is the second type of service that does not have the rate requirement For similar business, execute a21;

In a specific embodiment, the present invention divides the services that can be carried by the LTE230 system into two categories according to whether there is a requirement for the transmission rate. Among them, the current user's current service that has a transmission rate requirement is the first category of services, specifically video services. , voice service; the second type of service that does not have a transmission rate requirement for the current service of the current user, specifically can be a load control service, a data collection service, and a distribution network automation service. In this method, the services are divided into the first type of service and the second type of service, and different methods are used to allocate subband resources according to the transmission characteristics of the first type of service and the second type of service.

a11. Determine whether the wireless communication system can accept the current first type of service according to the transmission capability of the wireless communication system, if so, execute a12, otherwise execute a31;

When selecting an appropriate number of subbands according to the modulation and coding scheme, if the modulation and coding scheme changes to a lower order, more subbands are required to meet the transmission requirements. In order to avoid that enough subbands cannot be allocated to the user at this time, when the current user's service is the first type of service, first determine whether the wireless communication system can accept the current first type of service according to the transmission capability of the wireless communication system. Specifically, count all the first-type services that have been accepted by the current wireless communication system, and when the transmission requirements of the newly added first-type services and all the first-type services that have been accepted are within the transmission capability range of the wireless communication system, allow The wireless communication system accepts the first type of service. In this way, it is possible to avoid the phenomenon that the sub-bands cannot be allocated due to the inability to satisfy the transmission capability of the current wireless communication system.

When the transmission capability of the wireless communication system can accommodate the first type of service, go to step a12, and when the transmission capability of the wireless communication system cannot accommodate the first type of service, step a31 needs to be executed, and the subband resource preemption process is as follows: The current user allocates a subband, and then ends the current process.

Preemption is to stop some low-priority services, and accept new services if the preemption is successful. Different types of services have different priorities. If the current service has a higher priority, the lower-priority service can be preempted to ensure the transmission of the higher-priority service.

a12. Determine the number of idle subbands allocated for the current user according to the current channel quality, and then execute a13;

For the first type of service, the number of idle subbands allocated to the current user needs to be based on the current channel quality. Specifically, an appropriate number of subbands is selected according to the guaranteed bit rate GBR and the current modulation and coding mode, and is compared with the number of subbands subscribed by the user, and then a smaller value is taken for resource allocation.

a13, judge whether there is a continuous idle subband that is the same as the number of idle subbands determined for the first type of service, if so, execute a32, otherwise execute a31;

When the number of idle subbands allocated for the current user is determined according to step a12, it is then judged whether the current wireless communication system has the same and continuous idle subbands as the number of idle subbands determined for the first type of service. Only when the system has a continuous number of idle subbands, and the number is the same as the determined number of idle subbands for the first type of service.

a21. Determine the number of idle subbands allocated for the current user according to the resource usage of the wireless communication system and the user capability, and then execute a22;

When it is determined that the current service of the current user is the second type of service, the number of idle subbands allocated by the current user is determined according to the resource usage of the wireless communication system and the user capability. For the second type of service that has no transmission rate requirement, it is not necessary to use the number of subscribed subbands for transmission, but to determine the current value by analyzing the total number of idle subbands available in the current wireless communication system and the minimum of the number of subscribed subbands of the current user. The number of idle subbands allocated by the user, so that the subband resources in the system can be fully utilized, and the most suitable subband resources can be selected for the user for allocation.

a22, determine whether there is currently a continuous idle sub-band that is the same as the number of idle sub-bands determined for the second type of service, if so, execute a32, otherwise execute a23;

After determining the number of idle subbands allocated for the second type of service, it is also necessary to judge whether the current system has the same number of consecutive idle subbands. Step a32 is executed to allocate a certain number of consecutive free subbands to the current user, and then the current process ends. When the same number of consecutive free subbands do not exist in the system, step a23 is performed.

a23, determine whether the number of idle sub-bands determined for the second type of service is the lowest level of the preset number of sub-bands, if so, execute a31, otherwise execute a24;

When there are no consecutive idle subbands with the same number of idle subbands allocated for the second type of service in the system, it is also necessary to judge whether the number of idle subbands determined for the second type of service is the preset minimum number of subbands The preset minimum number of subbands is whether the number of free subbands is 1. If it is 1, use the subband resource preemption process to allocate subbands for the current user, and then end the current process; if not, execute the steps a24.

a24, lowering the number of idle subbands determined for the second type of service by one step, and substituting the number of idle subbands lowered by one step and returning to a22 for re-judgment;

When the number of idle subbands determined for the second type of service is not the lowest level 1, the number of idle subbands determined for the second type of service is lowered by one level and substituted into the number of idle subbands lowered by one level Return to step a22 to re-judgment.

a31. Use the subband resource preemption process to allocate a subband to the current user, and then end the current process;

a32. Allocate a certain number of consecutive free subbands to the current user, and then end the current process.

In the above step a21, the number of idle subbands allocated to the current user is determined according to the minimum value of the total number of currently available idle subbands and the number of subscribed subbands of the current user. Specifically, the following formula is used to determine the number of idle subbands allocated to the current user:

Among them, S is the number of idle subbands allocated for the current user, Δ is the number of users who initiate service transmission within the duration of the second type of service; Z is the number of idle subbands of the wireless communication system; N is the current need to allocate resources The number of users; the Func function represents the number of sub-bands rounded down to each gear; A is the number of sub-bands signed by the current user.

In a specific embodiment, the number of sub-bands for each gear includes 1, 4, 9, 19, and 39. Among them, the lowest gear is that the number of subbands is 1.

In a specific embodiment, as shown in FIG. 1 , the method for scheduling multi-subband services in a power wireless private network provided by the present invention is used.

First determine whether the current service of the current user has a requirement on the transmission rate, and when the service has a requirement on the transmission rate, further determine whether the wireless communication system can accept the user, that is, whether the transmission capacity of the system can meet the requirements and then accept the user. If the system cannot accept the user, it directly enters the preemption process, and uses the subband resource preemption process to allocate a subband to the current user; if the system can accept the user, it is calculated as the current user based on the guaranteed bit rate GBR and the current modulation and coding method. The number L of subbands allocated by the user. Then, it is judged whether there are consecutive L idle subbands in the system that can be allocated to the current user, and when it can be allocated to it, the allocation is successful, and the allocation of the current user is ended. When it cannot be allocated, the preemption process is entered.

When the service does not require the transmission rate, determine the number S of idle subbands allocated for the current user according to the resource usage of the wireless communication system and user capabilities, and judge whether there are S consecutive idle subbands in the system, if there are S idle subbands If there are consecutive free subbands, the current user will be allocated subband resources to complete the allocation; if there are no S consecutive free subbands in the system, it is necessary to judge whether the S is the lowest subband number 1, and if so, enter Preemption process, if not, set S as the number of sub-bands one level lower, and then determine whether there is a number of sub-bands lower by one level in the system, and repeat the above process until the sub-band is successfully allocated to the current user The resource or enter the preemption process, and use the subband resource preemption process to allocate a subband to the current user.

Through the method provided by the invention, the current user's service is classified and judged, transmission resources are flexibly utilized for different service types, data accumulation is reduced, user disconnection is avoided, and transmission efficiency of the wireless communication system is improved.

The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the present invention. within the scope of protection.

Claims (8)

1. A multi-subband service scheduling method in a power wireless private network, characterized in that the method comprises the steps: a00. Determine whether the current service of the current user has a requirement for the transmission rate. If the current service of the current user is the first type of service that has the rate requirement, execute a11; if the current service of the current user is the second type of service that does not have the rate requirement Class business, execute a21; a11. Determine whether the wireless communication system can accept the current first type of service according to the transmission capability of the wireless communication system, if so, execute a12, otherwise execute a31; a12. Determine the number of idle subbands allocated for the current user according to the current channel quality, and then execute a13; a13, judge whether there is a continuous idle subband that is the same as the number of idle subbands determined for the first type of service, if so, execute a32, otherwise execute a31; a21. Determine the number of idle subbands allocated for the current user according to the resource usage of the wireless communication system and the user capability, and then execute a22; a22, determine whether there is currently a continuous idle sub-band that is the same as the number of idle sub-bands determined for the second type of service, if so, execute a32, otherwise execute a23; a23, determine whether the number of idle sub-bands determined for the second type of service is the lowest level of the preset number of sub-bands, if so, execute a31, otherwise execute a24; a24, lowering the number of idle subbands determined for the second type of service by one step, and substituting the number of idle subbands lowered by one step and returning to a22 for re-judgment; a31. Use the subband resource preemption process to allocate a subband to the current user, and then end the current process; a32. Allocate a certain number of consecutive free subbands to the current user, and then end the current process. 2. The method according to claim 1, wherein the determining the number of idle subbands allocated for the current user according to the current channel quality comprises: determining the number of idle subbands allocated for the current user according to the guaranteed bit rate GBR and the current modulation and coding scheme. number of subbands. 3 . The method according to claim 1 , wherein the a21 determines the number of idle subbands allocated to the current user according to the minimum of the total number of currently available idle subbands and the number of subscribed subbands of the current user. 4 . 4. The method according to claim 3, wherein the a21 utilizes the following formula to determine the number of idle subbands allocated for the current user:

Among them, S is the number of idle subbands allocated for the current user, Δ is the number of users who initiate service transmission within the duration of the second type of service; Z is the number of idle subbands of the wireless communication system; N is the current need to allocate resources The number of users; the Func function represents the number of sub-bands rounded down to each gear; A is the number of sub-bands signed by the current user. 5 . The method according to claim 4 , wherein the number of gear sub-bands includes 1, 4, 9, 19, and 39. 6 . 6. The method according to claim 1, wherein the wireless communication system is an LTE230 system. 7 . The method according to claim 1 , wherein the first type of services includes video services and voice services. 8 . 8 . The method according to claim 1 , wherein the second type of service includes load control service, data collection service and distribution network automation service. 9 .

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