CN110753311A - Method and device for scheduling group voice service under small bandwidth - Google Patents
Method and device for scheduling group voice service under small bandwidth Download PDFInfo
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- H04W4/06—Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
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- H04W72/50—Allocation or scheduling criteria for wireless resources
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Abstract
The application provides a method and a device for scheduling group voice services under a small bandwidth, wherein the method comprises the following steps: when the configuration scheduling mode aiming at the group voice service is dynamic scheduling, if the control channel of the cell is determined to be in a medium load state currently and the number of the group voice service data packets to be scheduled in the current TTI is less than N, waiting for a scheduling period and then scheduling the group voice service data packets; if the control channel of the cell is determined to be in a high load state and the number of the group voice service data packets to be scheduled in the current TTI is determined to be less than M, determining whether the group voice service data packets are scheduled again in the next scheduling period; if the control channel of the cell is determined to be in the ultrahigh load state, the group voice service data packet is not scheduled in the current scheduling period, and the scheduling period is set to be 4T aiming at the group voice service data packet. The method can reasonably utilize the channel resources of the control channel.
Description
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a method and an apparatus for scheduling group voice services under a small bandwidth.
Background
With the continuous development of wireless communication technology, trunking communication technology is developed from analog systems to narrowband digital trunking systems. Meanwhile, as the demand of industry users for wireless broadband gradually increases, the quality requirements of industry users for voice services become higher and higher. In order to meet the needs of industrial users, the conventional trunking system will exit the market, and instead, the conventional trunking system will be a digital trunking communication system represented by Time Division-Synchronous Code Division Multiple Access (TD-SCDMA) Long Term Evolution (TD-SCDMA Long Term Evolution).
The current way that group voice scheduling under the small bandwidth of the LTE system is adopted in the industry is a dynamic scheduling way, but when there are more small data packet services in the LTE private network system, it is an urgent problem to solve how to reduce the occupation of the control channel resources in the small bandwidth system to greatly increase the demand for the control channel resources.
Disclosure of Invention
In view of this, the present application provides a method and an apparatus for scheduling group voice services under a small bandwidth, which can reasonably utilize channel resources of a control channel.
In order to solve the technical problem, the technical scheme of the application is realized as follows:
a method for scheduling group voice service under small bandwidth includes:
when the configuration scheduling mode aiming at the group voice service is dynamic scheduling, if the control channel of the cell is determined to be in a medium load state currently and the number of the group voice service data packets to be scheduled in the current TTI is less than N, waiting for a scheduling period and then scheduling the group voice service data packets;
if the control channel of the cell is determined to be in a high load state and the number of the group voice service data packets to be scheduled in the current TTI is determined to be less than M, determining whether the group voice service data packets are scheduled again in the next scheduling period; wherein M is greater than N;
if the control channel of the cell is determined to be in the ultrahigh load state, the group voice service data packet is not scheduled in the current scheduling period, and the scheduling period is set to be 4T aiming at the group voice service data packet.
A group voice service scheduling apparatus under a small bandwidth, the apparatus comprising: the device comprises a first determining unit, a second determining unit and a scheduling unit;
the first determining unit is used for determining the load state of the cell;
the second determining unit is configured to determine the number of group voice service data packets to be scheduled;
the scheduling unit is configured to, when the configuration scheduling manner for the group voice service is dynamic scheduling, wait for a scheduling period to reschedule the group voice service data packet if the first determining unit determines that the control channel of the cell is currently in a medium load state and the second determining unit determines that the number of the group voice service data packets to be scheduled in the current TTI is less than N; if the first scheduling unit determines that the control channel of the cell is in a high load state and the second scheduling unit determines that the number of the group voice service data packets to be scheduled in the current TTI is less than M, then determining whether to schedule the group voice service data packets in the next scheduling period; wherein M is greater than N; if the first determining unit determines that the control channel of the cell is in the ultrahigh load state, the group of voice service data packets are not scheduled in the current scheduling period, and the scheduling period is set to 4T aiming at the group of voice service data packets.
According to the technical scheme, when the dynamic scheduling mode is configured for the group voice service, whether the group voice service data packet to be scheduled is scheduled in the current scheduling period is determined according to the current load state of the control channel of the cell and the number of the group voice service data packets to be scheduled. The scheme can flexibly schedule based on the control channel load and the number of the group voice service data packets to be scheduled, and can reasonably utilize the channel resources of the control channel.
Drawings
Fig. 1 is a schematic diagram illustrating a voice group service scheduling process according to an embodiment of the present application;
fig. 2 is a schematic diagram of a voice group service scheduling process in the second embodiment of the present application;
fig. 3 is a schematic structural diagram of an apparatus applied to the above-described technology in the embodiment of the present application.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly apparent, the technical solutions of the present invention are described in detail below with reference to the accompanying drawings and examples.
The embodiment of the application provides a group voice service scheduling method under a small bandwidth, and when a dynamic scheduling mode is configured for a group voice service, whether a group voice service data packet to be scheduled is scheduled or not in a current scheduling period is determined according to the current load state of a control channel of a cell and the number of the group voice service data packets to be scheduled. The scheme can flexibly schedule based on the control channel load and the number of the group voice service data packets to be scheduled, and can reasonably utilize the channel resources of the control channel.
In the embodiment of the present application, three scheduling manners for implementing voice group service scheduling are provided, and the following description is made by using three embodiments:
example one
In this embodiment, the scheduling mode configured for the group voice service is dynamic scheduling.
In this embodiment, the CCE resource utilization needs to be counted for each scheduling period;
when the CCE resource utilization rate is smaller than a first preset value, determining that a control channel of a cell is in a light load state;
when the CCE resource utilization rate is not less than a first preset value and is less than a second preset value, determining that a control channel of a cell is in a medium load state;
when the CCE resource utilization rate is not less than the second preset value and is less than a third preset value, determining that a control channel of the cell is in a high-load state;
and when the CCE resource utilization rate is not less than the third preset value, determining that the control channel of the cell is in an overload state.
And aiming at any data packet of the group voice service to be scheduled, when determining whether to schedule in the current Transmission Time Interval (TTI), determining the current load state of a control channel of the cell according to the CCE resource utilization rate of the previous scheduling period.
The following describes in detail a process of implementing voice group service scheduling in this embodiment with reference to the accompanying drawings.
Referring to fig. 1, fig. 1 is a schematic diagram illustrating a voice group service scheduling process according to an embodiment of the present application. The method comprises the following specific steps:
In this step, the group voice service data packet is scheduled again in waiting for a scheduling period, that is, the group voice service data packet is not scheduled in the current scheduling period, the data packet is scheduled in the next scheduling period of the current scheduling period after waiting for a scheduling period, and if the data packet to be scheduled exists in the next scheduling period of the current scheduling period, the group voice service data packet to be scheduled is scheduled together with the data packet to be scheduled in the next scheduling period; and if the data packet to be scheduled does not exist in the next scheduling period of the current scheduling period, scheduling the group voice service data packet which needs to be scheduled currently in the next scheduling period of the current scheduling period.
And if the control channel of the cell is determined to be in the medium load state currently and the number of the group voice service data packets to be scheduled in the current TTI is determined to be not less than N, scheduling the group voice service data packets in the current TTI.
Wherein M, N is an integer, and M is greater than N.
In a specific implementation, the specific value of M, N may be set according to the actual application environment, such as setting M to 3 and N to 2, but is not limited to the above setting.
In this step, it is determined whether to schedule the group of voice service data packets in the next scheduling period, that is, the group of voice service data packets are not scheduled in the current scheduling period, and whether to schedule the next scheduling period is determined according to the load state of the cell in the next period and the number of data packets.
If the control channel of the cell is determined to be in a high load state and the number of the group voice service data packets to be scheduled in the current TTI is determined to be not less than M, scheduling the group voice service data packets in the current TTI;
Specifically, in this step, the scheduling period is set to 4T for the group of voice service data packets, that is, the scheduling period is lengthened to 4T, and the group of voice service data packets are scheduled once every 4T.
And if the control channel of the cell is determined to be in a light load state, scheduling the group of voice service data packets in the current TTI.
Example two
The scheduling mode configured for the group voice service is semi-static scheduling and dynamic scheduling.
In the dynamic scheduling, time-frequency resources and allowed transmission rate are dynamically allocated in real time. Dynamic scheduling is the most basic and flexible scheduling method. The resource allocation adopts a demand allocation mode, and each scheduling needs the interaction of scheduling signaling, so that the overhead of the control signaling is very large, and the dynamic scheduling is suitable for services with obvious burst characteristics.
Semi-static scheduling is a combination of dynamic scheduling and persistent scheduling. The persistent scheduling means allocating resources to users according to a certain period. The method is characterized in that the scheduling is carried out only when the resource is allocated for the first time, and the subsequent resource allocation does not need the indication of the scheduling signaling. In the semi-persistent scheduling bar, when the RRC establishes a service connection, the time-frequency resources and the allowed transmission rate are allocated, and the resource reconfiguration is also performed through an RRC message. Compared with dynamic scheduling, the scheduling mode has the advantages of slightly poor flexibility, small control signaling overhead and suitability for services with unobvious burst characteristics and guaranteed rate requirements.
In this embodiment, two manners, namely dynamic scheduling and semi-static scheduling, are configured, and only when scheduling is determined, a specific scheduling process is not limited, and after a scheduling time is determined, dynamic scheduling or static scheduling of a data packet can be realized according to an existing implementation manner.
Referring to fig. 2, fig. 2 is a schematic diagram of a voice group service scheduling process in the second embodiment of the present application. The method comprises the following specific steps:
In the implementation mode, the block error rate is used for determining how to schedule the voice group data packet currently, so that the control channel resources can be used more reasonably.
EXAMPLE III
And configuring the scheduling mode for the group voice service as a semi-static scheduling mode.
Semi-persistent scheduling is performed for all group voice traffic.
The process of the semi-persistent scheduling is implemented according to a scheduling mode in the existing implementation.
In the implementation mode, in a small bandwidth system, only group voice is allowed to perform semi-static scheduling, and occupation of dynamic scheduling on control channel resources is reduced.
Based on the same inventive concept, the application also provides a group voice service scheduling device under the small bandwidth. Referring to fig. 3, fig. 3 is a schematic structural diagram of an apparatus applied to the above technology in the embodiment of the present application. The device includes: a first determining unit 301, a second determining unit 302 and a scheduling unit 303;
a first determining unit 301, configured to determine a load state of a cell;
a second determining unit 302, configured to determine the number of group voice service data packets to be scheduled;
a scheduling unit 303, configured to, when the configuration scheduling manner for the group voice service is dynamic scheduling, wait for a scheduling period to reschedule the group voice service data packet if the first determining unit 301 determines that the control channel of the local cell is currently in the medium load state and the second determining unit 302 determines that the number of the group voice service data packets to be scheduled in the current TTI is less than N; if the first scheduling unit determines that the control channel of the cell is in a high load state and the second scheduling unit determines that the number of the group voice service data packets to be scheduled in the current TTI is less than M, then determining whether to schedule the group voice service data packets in the next scheduling period; wherein M is greater than N; if the first determining unit 301 determines that the control channel of the local cell is in the ultra-high load state, the group voice service data packet is not scheduled in the current scheduling period, and the scheduling period is set to 4T for the group voice service data packet.
Preferably, the first and second liquid crystal films are made of a polymer,
a scheduling unit 303, configured to schedule the group voice service data packet in the current TTI if the first determining unit 301 determines that the control channel of the current cell is currently in the medium load state, and the second determining unit 302 determines that the number of the group voice service data packets to be scheduled in the current TTI is not less than N; if the first determining unit 301 determines that the control channel of the local cell is in a high load state, and the second determining unit 302 determines that the number of the group voice service data packets to be scheduled in the current TTI is not less than M, the group voice service data packets are scheduled in the current TTI; if the first determining unit 301 determines that the control channel of the local cell is in the light load state, the group of voice service data packets is scheduled in the current TTI.
Preferably, the first and second liquid crystal films are made of a polymer,
a first determining unit 301, configured to count CCE resource utilization for each scheduling period; when the CCE resource utilization rate is smaller than a first preset value, determining that a control channel of a cell is in a light load state; when the CCE resource utilization rate is not less than a first preset value and is less than a second preset value, determining that a control channel of a cell is in a medium load state; when the CCE resource utilization rate is not less than the second preset value and is less than a third preset value, determining that a control channel of the cell is in a high-load state; and when the CCE resource utilization rate is not less than the third preset value, determining that the control channel of the cell is in an overload state.
Preferably, the first and second liquid crystal films are made of a polymer,
the first determining unit 301 is further configured to count a control channel block error rate when the configuration scheduling manner for the group voice service is semi-static scheduling and dynamic scheduling; determining whether the block error rate of the control channel is less than a preset block error rate;
the scheduling unit 303 is further configured to perform semi-static or dynamic scheduling on the group voice service in the current TTI when the first determining unit 301 determines that the control channel block error rate is less than the preset block error rate; otherwise, the group voice service added after the current TTI is scheduled in a semi-static scheduling mode, and the scheduling periods of the dynamic scheduling and the semi-static scheduling are both enlarged to 2 times of the original period.
Preferably, the first and second liquid crystal films are made of a polymer,
the scheduling unit 303 is further configured to perform semi-persistent scheduling for all group voice services when the scheduling manner configured for the group voice services is a semi-persistent scheduling manner.
The units of the above embodiments may be integrated into one body, or may be separately deployed; may be combined into one unit or further divided into a plurality of sub-units.
In summary, when a dynamic scheduling mode is configured for a group voice service, the present application determines whether to schedule a group voice service data packet to be scheduled in a current scheduling period according to a current load state of a control channel of a cell and the number of the group voice service data packets to be scheduled. The scheme can flexibly schedule based on the control channel load and the number of the group voice service data packets to be scheduled, and can reasonably utilize the channel resources of the control channel.
The embodiment of the application also provides an implementation mode for determining how to schedule the voice group data packet by using the block error rate, so that the control channel resource can be used more reasonably.
The embodiment of the application also provides an implementation mode for only allowing the group voice to perform semi-static scheduling in a small bandwidth system, so that the occupation of dynamic scheduling on control channel resources is reduced.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. A method for scheduling group voice services under small bandwidth is characterized in that the method comprises the following steps:
when the configuration scheduling mode aiming at the group voice service is dynamic scheduling, if the control channel of the cell is determined to be in a medium load state currently and the number of the group voice service data packets to be scheduled in the current transmission time interval TTI is less than N, waiting for a scheduling period and then scheduling the group voice service data packets;
if the control channel of the cell is determined to be in a high load state and the number of the group voice service data packets to be scheduled in the current TTI is determined to be less than M, determining whether the group voice service data packets are scheduled again in the next scheduling period; wherein M is greater than N;
if the control channel of the cell is determined to be in the ultrahigh load state, the group voice service data packet is not scheduled in the current scheduling period, and the scheduling period is set to be 4T aiming at the group voice service data packet.
2. The method of claim 1, further comprising:
if the control channel of the cell is determined to be in a medium load state currently and the number of the group voice service data packets to be scheduled in the current TTI is determined to be not less than N, the group voice service data packets are scheduled in the current TTI;
if the control channel of the cell is determined to be in a high load state and the number of the group voice service data packets to be scheduled in the current TTI is determined to be not less than M, scheduling the group voice service data packets in the current TTI;
and if the control channel of the cell is determined to be in a light load state, scheduling the group of voice service data packets in the current TTI.
3. The method according to claim 1 or 2, characterized in that the method further comprises:
counting the CCE resource utilization rate aiming at each scheduling period;
when the CCE resource utilization rate is smaller than a first preset value, determining that a control channel of a cell is in a light load state;
when the CCE resource utilization rate is not less than a first preset value and is less than a second preset value, determining that a control channel of a cell is in a medium load state;
when the CCE resource utilization rate is not less than the second preset value and is less than a third preset value, determining that a control channel of the cell is in a high-load state;
and when the CCE resource utilization rate is not less than the third preset value, determining that the control channel of the cell is in an overload state.
4. The method of claim 1, wherein when the scheduling manner configured for the group-oriented voice service is semi-static scheduling and dynamic scheduling, the method further comprises:
counting the block error rate of the control channel;
determining whether the block error rate of the control channel is less than a preset block error rate, if so, performing semi-static or dynamic scheduling of the group voice service in the current TTI; otherwise, the group voice service added after the current TTI is scheduled in a semi-static scheduling mode, and the scheduling periods of the dynamic scheduling and the semi-static scheduling are both enlarged to 2 times of the original period.
5. The method of claim 1, wherein when the scheduling scheme configured for the group-based voice service is a semi-persistent scheduling scheme, the method further comprises:
semi-persistent scheduling is performed for all group voice traffic.
6. A group voice service scheduling apparatus under a small bandwidth, the apparatus comprising: the device comprises a first determining unit, a second determining unit and a scheduling unit;
the first determining unit is used for determining the load state of the cell;
the second determining unit is configured to determine the number of group voice service data packets to be scheduled;
the scheduling unit is configured to, when the configuration scheduling manner for the group voice service is dynamic scheduling, wait for a scheduling period and then schedule the group voice service data packet if the first determining unit determines that the control channel of the cell is currently in a medium load state and the second determining unit determines that the number of the group voice service data packets to be scheduled in the current transmission time interval TTI is less than N; if the first scheduling unit determines that the control channel of the cell is in a high load state and the second scheduling unit determines that the number of the group voice service data packets to be scheduled in the current TTI is less than M, then determining whether to schedule the group voice service data packets in the next scheduling period; wherein M is greater than N; if the first determining unit determines that the control channel of the cell is in the ultrahigh load state, the group of voice service data packets are not scheduled in the current scheduling period, and the scheduling period is set to 4T aiming at the group of voice service data packets.
7. The apparatus of claim 6,
the scheduling unit is further configured to schedule the group of voice service data packets in the current TTI if the first determining unit determines that the control channel of the cell is currently in the medium load state, and the second determining unit determines that the number of the group of voice service data packets to be scheduled in the current TTI is not less than N; if the first determining unit determines that the control channel of the cell is in a high-load state and the second determining unit determines that the number of the group voice service data packets to be scheduled in the current TTI is not less than M, the group voice service data packets are scheduled in the current TTI; and if the first determining unit determines that the control channel of the cell is in a light load state, scheduling the group of voice service data packets in the current TTI.
8. The apparatus according to claim 6 or 7,
the first determining unit is further configured to count CCE resource utilization for each scheduling period; when the CCE resource utilization rate is smaller than a first preset value, determining that a control channel of a cell is in a light load state; when the CCE resource utilization rate is not less than a first preset value and is less than a second preset value, determining that a control channel of a cell is in a medium load state; when the CCE resource utilization rate is not less than the second preset value and is less than a third preset value, determining that a control channel of the cell is in a high-load state; and when the CCE resource utilization rate is not less than the third preset value, determining that the control channel of the cell is in an overload state.
9. The apparatus of claim 6,
the first determining unit is further configured to count a control channel block error rate when the configuration scheduling manner for the group voice service is semi-static scheduling and dynamic scheduling; determining whether the block error rate of the control channel is less than a preset block error rate;
the scheduling unit is further configured to perform semi-static or dynamic scheduling of the group voice service in the current TTI when the first determining unit determines that the block error rate of the control channel is less than the preset block error rate; otherwise, the group voice service added after the current TTI is scheduled in a semi-static scheduling mode, and the scheduling periods of the dynamic scheduling and the semi-static scheduling are both enlarged to 2 times of the original period.
10. The apparatus of claim 6,
the scheduling unit is further configured to perform semi-persistent scheduling for all group voice services when the scheduling mode configured for the group voice services is a semi-persistent scheduling mode.
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