CN108347315A - Multi-subband business scheduling method in a kind of electric power wireless private network - Google Patents

Abstract

The present invention provides multi-subband business scheduling methods in a kind of electric power wireless private network.Classification judgement is carried out to the business of active user, to there is the business of transmission rate request, it is determined as the idle sub-band number of active user's distribution according to present channel quality, to the business of not transmission rate request, it is determined as the idle sub-band number of active user's distribution according to the resource service condition and user capability of wireless communication system, for different type of service flexible utilization transfer resources, reduces data stacking, it avoids user from going offline, improves the efficiency of transmission of wireless communication system.

Description

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

technical field

The invention relates to the field of communication technology, 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 discrete spectrum resources in the 230MHz frequency band of the power industry, innovatively developed wireless communication systems.

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

In order to save control channel overhead, semi-static scheduling is adopted for uplink and downlink scheduling, that is, after one scheduling, the resources in the subsequent time are completely allocated to a user until the user's uplink or downlink data transmission is completed. The completion of the uplink data transmission is realized by the UE reporting a BSR, wherein, a BSR indicating that the quantity is zero is called an Ending BSR. When the base station judges that several Ending BSRs are received consecutively according to the service type, it considers that the data transmission is over, and starts scheduling the next user. For different services, the number of Ending BSRs is set separately. Usually, the data acquisition 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 GBR (Guaranteed Bit Rate), and set the number of subbands to single subband, 4 subbands, 9 subbands, and 39 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 acquisition 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 a cell has a large number of UEs performing data transmission at the same time, if it is required to use the subscribed subband of the UE for resource allocation, it is likely that resources cannot be allocated. In this way, the UE may not be scheduled for a long time, and the application layer may A retransmission will be initiated, resulting in more data accumulation. In a more serious situation, the UE will be disconnected and the service will fail.

For video and voice services, these services have GBR rate requirements. When the channel condition is good, you can choose a higher-order modulation and coding method, the transmission efficiency of the sub-bands increases, and the transmission requirements can be met by using fewer sub-bands. However, in the existing system, the multi-sub-band UE 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-mentioned services, the present invention provides a multi-subband service scheduling method in a private electric power wireless network, so that transmission resources can be fully utilized, system transmission efficiency can be improved, data accumulation can be reduced, and UE disconnection can be avoided.

Contents of the invention

The invention provides a multi-subband service scheduling method in a power wireless private network, through which transmission resources can be flexibly utilized, data accumulation can be reduced, users can be prevented from being disconnected, and the transmission efficiency of a wireless communication system can be improved.

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

a00. Determine whether the current service of the current user has a requirement on the transmission rate. If the current service of the current user is the first type of service with a rate requirement, then execute a11; if the current service of the current user is the second type of service without a rate requirement. class business, execute a21;

a11. Judging and determining 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 to the current user according to the current channel quality, and then execute a13;

a13. Judging whether there are consecutive free subbands with the same number of free subbands as determined for the first type of service, if so, execute a32, otherwise execute a31;

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

a22. Judging whether there are consecutive idle subbands with the same number of idle subbands determined for the second type of service, if so, execute a32, otherwise execute a23;

a23, judging whether the number of idle subbands determined for the second type of service is the lowest level of the preset number of subbands, if so, execute a31, otherwise execute a24;

a24. Lower the number of idle subbands determined for the second type of service by one level, and substitute the lowered number of idle subbands by one level back to a22 for re-judgment;

a31. Using the subband resource preemption process to allocate subbands for the current user, and then end the current process;

a32. Allocate a certain number of continuous idle 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 value of the total number of currently available idle subbands and the number of subscribed subbands of the current user.

Optionally, the a21 uses the following formula 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 indicates the number of subbands rounded down to each gear; A is the number of subbands signed by the current user.

Optionally, the number of gear subbands includes 1, 4, 9, 19, and 39.

Optionally, the wireless communication system is an LTE230 system.

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

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 flow chart of a method in a specific embodiment of the present invention.

Detailed ways

In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in detail below in conjunction with 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 TD-LTE technology. The present invention will be described in detail below with reference to the accompanying drawings.

In the prior art, for load control services, data collection services, and distribution network automation services, when using the user's subscription subband for resource allocation, there may be a problem that resources cannot be allocated, resulting in data accumulation; and for video and voice services That is, in one transmission of multiple sub-band 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 multi-subband service scheduling in the electric power wireless private network, by distinguishing the types of services, and allocating subband resources for different services, avoiding resource allocation when using contracted subbands for resource allocation waste, which fully improves the utilization rate of transmission resources and improves the transmission efficiency of the system.

The present invention will be described in detail below with reference to the accompanying drawing 1, wherein, Fig. 1 is a schematic flow chart of the method in a specific embodiment of the present invention.

As shown in Figure 1, the present invention provides a method for scheduling multi-subband services in a private electric power wireless network, the method comprising the following steps:

a00. Determine whether the current service of the current user has a requirement on the transmission rate. If the current service of the current user is the first type of service with a rate requirement, then execute a11; if the current service of the current user is the second type of service without a rate requirement. class business, execute a21;

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

a11. Judging and determining 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 the appropriate number of sub-bands according to the modulation and coding method, if the modulation and coding method changes to a lower order, more sub-bands are needed to meet the transmission requirements. In order to avoid not being able to allocate enough subbands to the user at this time, when the current user's service is the first type of service, first judge 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 the current wireless communication system has accepted, 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 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 subbands cannot be allocated due to the insufficient transmission capacity of the current wireless communication system.

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

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

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

For the first type of service, it is necessary to allocate the number of idle subbands for the current user according to 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 method, and compared with the number of subbands subscribed by the user, and then the smaller value is selected for resource allocation.

a13. Judging whether there are consecutive free subbands with the same number of free subbands as determined for the first type of service, if so, execute a32, otherwise execute a31;

When the number of idle subbands allocated to the current user is determined according to step a12, it is then judged whether the current wireless communication system has the same number of idle subbands as determined for the first type of service and continuous idle subbands. 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 to the current user according to the resource usage and user capabilities of the wireless communication system, 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 to the current user is determined according to the resource usage of the wireless communication system and user capabilities. For the second type of service without transmission rate requirements, it is not necessary to use the number of sub-bands for transmission, but to determine the current value by analyzing the total number of free sub-bands available in the current wireless communication system and the minimum number of sub-bands of the current user. In this way, the subband resources in the system can be fully utilized, and the most suitable subband resources can be selected for users for allocation.

a22. Judging whether there are consecutive idle subbands with the same number of idle subbands 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 determine whether the current system has the same number of continuous idle subbands. When the system has the same number of continuous idle subbands, Execute step a32 to allocate a certain number of continuous idle subbands to the current user, and then end the current process. When the system does not have the same number of consecutive idle subbands, step a23 is performed.

a23, judging whether the number of idle subbands determined for the second type of service is the lowest level of the preset number of subbands, if so, execute a31, otherwise execute a24;

When there are no consecutive free subbands with the same number of free subbands allocated for the second type of service in the system, it is also necessary to determine whether the number of free subbands determined for the second type of service is the lowest preset number of subbands The lowest level of the preset 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 it is not 1, execute the steps a24.

a24. Lower the number of idle subbands determined for the second type of service by one level, and substitute the lowered number of idle subbands by one level back to a22 for re-judgment;

When the number of idle subbands determined for the second type of business is not the lowest level 1, the number of idle subbands determined for the second type of business is lowered by one level, and it is substituted into the number of idle subbands adjusted down by one level Return to step a22 to judge again.

a31. Using the subband resource preemption process to allocate subbands for the current user, and then end the current process;

a32. Allocate a certain number of continuous idle 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 indicates the number of subbands rounded down to each gear; A is the number of subbands signed by the current user.

In a specific embodiment, the number of subbands 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 multi-subband service scheduling method in the electric wireless private network provided by the present invention is used.

First judge whether the current service of the current user requires a transmission rate. When the service requires a transmission rate, further judge whether the wireless communication system can accept the user, that is, whether the transmission capacity of the system can meet the user before admitting it. If the system cannot accommodate the user, it will directly enter the preemption process, and use the subband resource preemption process to allocate subbands for the current user; if the system can accommodate the user, it will be calculated according to 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 L consecutive idle subbands in the system that can be allocated to the current user, and if they can be allocated, the allocation is successful, and the allocation to the current user ends. When it cannot be allocated, it enters the preemption process.

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

Through the method provided by the invention, the business of the current user is classified and judged, the transmission resources are flexibly utilized for different business types, the accumulation of data is reduced, the user is prevented from being disconnected, and the transmission efficiency of the wireless communication system is improved.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the present invention. within the scope of protection.

Claims (8)

1. A multi-subband service dispatching method in a power wireless private network, is characterized in that, the method comprises the steps: a00. Determine whether the current service of the current user has a requirement on the transmission rate. If the current service of the current user is the first type of service with a rate requirement, then execute a11; if the current service of the current user is the second type of service without a rate requirement. class business, execute a21; a11. Judging and determining 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 to the current user according to the current channel quality, and then execute a13; a13. Judging whether there are consecutive free subbands with the same number of free subbands as determined for the first type of service, if so, execute a32, otherwise execute a31; a21. Determine the number of idle subbands allocated to the current user according to the resource usage and user capabilities of the wireless communication system, and then execute a22; a22. Judging whether there are consecutive idle subbands with the same number of idle subbands determined for the second type of service, if so, execute a32, otherwise execute a23; a23, judging whether the number of idle subbands determined for the second type of service is the lowest level of the preset number of subbands, if so, execute a31, otherwise execute a24; a24. Lower the number of idle subbands determined for the second type of service by one level, and substitute the lowered number of idle subbands by one level back to a22 for re-judgment; a31. Using the subband resource preemption process to allocate subbands for the current user, and then end the current process; a32. Allocate a certain number of continuous idle 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 to the current user according to the current channel quality comprises: determining the number of idle subbands allocated to the current user according to the guaranteed bit rate GBR and the current modulation and coding method number of subbands. 3. The method according to claim 1, wherein the a21 determines the number of free subbands allocated to the current user according to the minimum value of the total number of currently available free subbands and the number of subbands subscribed by the current user. 4. The method according to claim 3, wherein the a21 utilizes the following formula 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 indicates the number of subbands rounded down to each gear; A is the number of subbands signed by the current user. 5 . The method according to claim 4 , wherein the number of gear subbands includes 1, 4, 9, 19, and 39. 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 service includes video service and voice service. 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.