CN108076526B - Scheduling method and device - Google Patents

Scheduling method and device Download PDF

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CN108076526B
CN108076526B CN201611024218.6A CN201611024218A CN108076526B CN 108076526 B CN108076526 B CN 108076526B CN 201611024218 A CN201611024218 A CN 201611024218A CN 108076526 B CN108076526 B CN 108076526B
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CN108076526A (en
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火统娟
田华
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Datang Mobile Communications Equipment Co Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/12—Wireless traffic scheduling
    • H04W72/121—Wireless traffic scheduling for groups of terminals or users
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0078—Timing of allocation
    • H04L5/0082—Timing of allocation at predetermined intervals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/12—Wireless traffic scheduling
    • H04W72/1263—Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows
    • H04W72/1273—Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows of downlink data flows
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W84/00—Network topologies
    • H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
    • H04W84/04—Large scale networks; Deep hierarchical networks
    • H04W84/06—Airborne or Satellite Networks

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Radio Relay Systems (AREA)

Abstract

The embodiment of the invention provides a scheduling method and a device, wherein the scheduling method comprises the following steps: presetting two or more than two UE groups, and setting traversal interval time according to the number of the UE groups and the frame length in a satellite mobile communication system; traversing the UE group at the head according to the arrangement sequence of two or more UE groups at the initial time of each frame to detect whether a downlink data packet needing to be sent exists in the UE group at the head; if yes, sending a downlink data packet; and traversing each UE group in sequence according to the arrangement sequence after traversing the interval time. The invention can improve the rationality of UE scheduling, effectively improve the resource utilization rate and reduce the system burden under the condition of not influencing the normal scheduling of the UE.

Description

Scheduling method and device
Technical Field
The embodiment of the invention relates to the field of communication, in particular to a scheduling method and a scheduling device.
Background
In a satellite mobile communication system, a fixed time value of each frame sent by a gateway controller (GSC) to a gateway receiver (GTS) of a base station is 60ms, that is, a MAC (media access control) layer in the GSC needs to traverse all User Equipments (UEs) every 60ms to find whether the UEs have downlink data to be sent to the base station, and process the downlink data, so as to ensure that each UE is scheduled once in each frame (60 ms). However, in the prior art, in the process of scheduling the UE, the interval time between each scheduling is too long, so that the resource utilization rate is low, and the MAC layer needs to schedule all UEs at the same time every frame, so that a job congestion phenomenon may occur, and a system load may be increased.
Disclosure of Invention
The embodiment of the invention provides a scheduling method and a scheduling device, which are used for solving the problems that in the process of scheduling UE (user equipment) in the prior art, the resource utilization rate is low due to overlong time intervals between each scheduling, and all UE need to be scheduled at the same time in each frame of an MAC (media access control) layer, so that the phenomenon of operation congestion possibly occurs and the system burden is increased.
In order to solve the above problem, the present invention discloses a scheduling method, which is applied to a satellite mobile communication system, and the method comprises:
presetting two or more than two UE groups, and setting traversal interval time according to the number of the UE groups and the frame length in a satellite mobile communication system;
traversing the UE group at the head according to the arrangement sequence of two or more UE groups at the initial time of each frame to detect whether a downlink data packet needing to be sent exists in the UE group at the head;
if yes, sending a downlink data packet;
and traversing each UE group in sequence according to the arrangement sequence after traversing the interval time.
In a preferred embodiment of the invention, the method further comprises: if the situation that new UE accessed to the satellite mobile communication system exists currently is monitored, the new UE is distributed to a target UE group in two or more UE groups, and UE information corresponding to the new UE and a corresponding relation between the UE information and the target UE group are recorded.
In a preferred embodiment of the present invention, the step of allocating the new UE to a target UE group of two or more UE groups specifically includes:
detecting the number of UE contained in each UE group of a preset group;
and according to the number of the UE, allocating the new UE to the UE group containing the least number of the UE.
In a preferred embodiment of the present invention, at the start time of each frame, the step of traversing the first UE group according to the arrangement order of two or more UE groups specifically includes:
traversing the UE group at the head according to the locally stored UE information of all the UEs and the corresponding relation between the UE information of all the UEs and two or more UE groups.
In a preferred embodiment of the invention, the method further comprises: and traversing the first UE group again if the last UE group is traversed according to the arrangement sequence.
According to another aspect of the present invention, there is provided a scheduling apparatus for a satellite mobile communication system, comprising:
the device comprises a setting module, a receiving module and a processing module, wherein the setting module is used for presetting two or more UE groups and setting traversal interval time according to the number of the UE groups and the frame length in a satellite mobile communication system;
the traversing module is used for traversing the UE group at the head according to the arrangement sequence of two or more UE groups at the initial time of each frame so as to detect whether a downlink data packet needing to be sent exists in the UE group at the head;
a sending module, configured to send a downlink data packet if the downlink data packet is received;
the traversing module is further configured to sequentially traverse each UE group according to the arrangement order through the traversing interval time.
In a preferred embodiment of the invention, the apparatus further comprises:
and the distribution module is used for distributing the new UE to a target UE group in two or more UE groups and recording UE information corresponding to the new UE and the corresponding relation between the UE information and the target UE group if the situation that the new UE accessed to the satellite mobile communication system currently exists is monitored.
In a preferred embodiment of the present invention, the allocation module is further configured to:
detecting the number of UE contained in each UE group of two or more UE groups;
and according to the number of the UE, allocating the new UE to the UE group containing the least number of the UE.
In a preferred embodiment of the present invention, the traversing module is further configured to:
traversing the UE group at the head according to the locally stored UE information of all the UEs and the corresponding relation between the UE information of all the UEs and two or more UE groups.
In a preferred embodiment of the present invention, the traversing module is further configured to traverse the UE group located at the head again after traversing the last UE group according to the ranking order.
Compared with the prior art, the invention sets traversal interval time by presetting two or more UE groups and according to the number of the UE groups and the frame length in the satellite mobile communication system; traversing the UE group at the head according to the arrangement sequence of two or more UE groups at the initial time of each frame to detect whether a downlink data packet needing to be sent exists in the UE group at the head; if yes, sending a downlink data packet; and traversing each UE group in sequence according to the arrangement sequence after traversing the interval time. Therefore, the rationality of UE scheduling is improved, the resource utilization rate is effectively improved and the system burden is reduced under the condition that normal scheduling and use of the UE are not influenced.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments of the present invention will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without inventive labor.
FIG. 1 is a flow chart of a scheduling method of an embodiment of the present invention;
fig. 2 is a block diagram of a scheduling apparatus according to an embodiment of the present invention.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
Referring to fig. 1, a flowchart of a scheduling method according to an embodiment of the present invention is shown, where the method is applied to a satellite mobile communication system, and specifically includes the following steps:
step 101, two or more UE groups are preset, and traversing interval time is set according to the number of the UE groups and the frame length in the satellite mobile communication system.
Specifically, in the embodiment of the present invention, in the satellite mobile communication system, the duration of each frame transmitted by the GSC to the GTS of the base station is fixed to be 60 ms. Thus, before the start of the service, the operator can set the preset grouping and the traversal interval time at the MAC layer in the GSC. In the embodiment of the present invention, two or more UE groups of any number may be set, and the traversal interval time needs to be set according to the number of the set UE groups and the frame length. For example, the following steps are carried out:
in an embodiment of the present invention, there may be 6 UE groups, and the traversal interval time is: 10 ms. That is, the MAC layer scans one group every 10ms when a UE call is made, and thus all UEs are scanned in one frame (60 ms).
In another embodiment of the present invention, there may be 3 UE groups, and the traversal interval time is: 20 ms. The operator can set the preset grouping and the preset time according to the actual requirement and the system processing capacity, which is not limited in the present invention.
Step 102, at the starting time of each frame, traversing the UE group at the head according to the arrangement order of two or more UE groups to detect whether there is a downlink data packet to be sent in the UE group at the head.
Specifically, in the embodiment of the present invention, at the start time of each frame, the MAC layer traverses the UE group located at the head of the sequence according to the arrangement order of the UE groups, so as to detect whether the UE in the UE group has a downlink data packet that needs to be sent. Specifically, a corresponding logical channel exists between each UE and the MAC layer, and the MAC layer learns whether the UE has a downlink data packet to be sent by traversing the logical channel corresponding to the UE. And when the downlink data packet exists, the MAC layer schedules all or part of the downlink data packet transmitted by the UE through the logic channel according to the data scheduling upper limit value. The upper limit is determined by the system and will not be described herein.
And if the MAC layer does not detect that the UE in the current UE group has the downlink data packet, no processing is carried out.
And step 103, if yes, sending a downlink data packet.
Specifically, in the embodiment of the present invention, when the MAC layer detects that there is a UE that needs to send downlink data in the first UE group, the MAC layer schedules the downlink data through a logical channel corresponding to the UE, so as to send the downlink data packet to the GTS through a physical channel between the GTS and the UE.
And step 104, sequentially traversing each UE group according to the arrangement sequence after traversing the interval time.
Specifically, in the embodiment of the present invention, after the MAC layer completes scheduling of the current UE group, after a predetermined time elapses, the MAC layer traverses the next UE group according to the preset grouping order, and completes scheduling of the next UE group.
In summary, in the technical solution of the embodiment of the present invention, two or more UE groups are preset, and the traversal interval time is set according to the number of the UE groups and the frame length in the satellite mobile communication system; traversing the UE group at the head according to the arrangement sequence of two or more UE groups at the initial time of each frame to detect whether a downlink data packet needing to be sent exists in the UE group at the head; if yes, sending a downlink data packet; and traversing each UE group in sequence according to the arrangement sequence after traversing the interval time. Therefore, the rationality of UE scheduling is improved, the resource utilization rate is effectively improved and the system burden is reduced under the condition that normal scheduling and use of the UE are not influenced.
Furthermore, in a preferred embodiment of the present invention, the method further comprises: if the situation that new UE accessed to the satellite mobile communication system exists currently is monitored, the new UE is distributed to a target UE group in two or more UE groups, and UE information corresponding to the new UE and a corresponding relation between the UE information and the target UE group are recorded.
In a preferred embodiment of the present invention, the step of allocating the new UE to a target UE group of two or more UE groups specifically includes:
detecting the number of UE contained in each UE group of a preset group;
and according to the number of the UE, allocating the new UE to the UE group containing the least number of the UE.
In a preferred embodiment of the present invention, at the start time of each frame, the step of traversing the first UE group according to the arrangement order of two or more UE groups specifically includes:
traversing the UE group at the head according to the locally stored UE information of all the UEs and the corresponding relation between the UE information of all the UEs and two or more UE groups.
In a preferred embodiment of the invention, the method further comprises: and traversing the first UE group again if the last UE group is traversed according to the arrangement sequence.
In order to make the scheduling method of the present invention better understood by those skilled in the art, the following detailed description is made with specific embodiments.
In a satellite mobile communication system, the time length of each frame transmitted by the GSC to the GTS of the base station is fixed to 60 ms. Thus, before the start of the service, the operator can set the preset grouping and the traversal interval time at the MAC layer in the GSC. It should be noted that: the traversal interval time is the interval between the first traversal starting time and the second traversal starting time. For example, the following steps are carried out: if the first UE group starts to traverse at the starting time (0ms), the second UE group starts to traverse after 10 ms.
In this embodiment, there are 6 UE groups, and the traversal interval time is: 10 ms. That is, the MAC layer scans one group every 10ms when a UE call is made, and thus all UEs are scanned in one frame (60 ms). The MAC record sequentially records the numbers of the groups as: UE group 1, UE group 2, UE group 3, UE group 4, UE group 5, UE group 6.
In the service process, it is assumed that the MAC layer currently traverses the UE group 2. Specifically, the MAC layer traverses the UE group 2 according to locally stored UE information of all UEs and a correspondence between the UE information of all UEs and the UE group. That is, the MAC obtains which UEs in the currently detected UE group 2 include through the correspondence between the UE information and the UE group, and performs one-by-one detection on the UEs in the UE group 2 according to the corresponding UE information. In embodiments of the present invention, the UE information is used to uniquely determine a new UE, including but not limited to the ID of the UE.
In this embodiment, the MAC layer detects that there are two UEs in the UE group 2, which need to send downlink data packets, respectively UE1 and UE 2. The MAC layer schedules downlink packets of the UE1 and the UE2 to a physical channel between the GTS through logical channels corresponding to the UE1 and the UE2, thereby transmitting the downlink packets of the UE1 and the UE2 to the GTS.
After 10ms, the MAC layer traverses the UE group 3 and schedules the UEs therein. The specific scheduling process is the same as that in user group 2, and is not described herein again. By analogy, the MAC traverses and schedules the UE groups according to the UE grouping sequence every 10ms, so that the UE is scheduled at different time intervals in each frame, the phenomenon of operation congestion is avoided, and the system burden is effectively relieved.
In the embodiment of the present invention, when the current frame (60ms) is finished, i.e. the traversal and scheduling for 6 groups are finished, the traversal and scheduling for UE group 1 are performed again at the beginning of the next frame, and the process is repeated.
In the embodiment of the present invention, it is assumed that after a period of time for a service to start, 10 UEs are included in the UE groups 1 to 5, and 9 UEs are included in the UE group 6. The current MAC layer is traversing the UE group 1, and at this time, the MAC layer monitors that there is a new UE currently accessing the satellite mobile communication system. And the MAC layer monitors the number of the UE contained in all the UE groups, and determines that the UE group with the minimum number of the current UE is the UE group 6, and then the MAC layer allocates the new UE to the UE group 6. Meanwhile, the MAC layer records UE information of the new UE and a correspondence between the UE information and the UE group 6.
In summary, in the technical solution of the embodiment of the present invention, two or more UE groups are preset, and the traversal interval time is set according to the number of the UE groups and the frame length in the satellite mobile communication system; traversing the UE group at the head according to the arrangement sequence of two or more UE groups at the initial time of each frame to detect whether a downlink data packet needing to be sent exists in the UE group at the head; if yes, sending a downlink data packet; and traversing each UE group in sequence according to the arrangement sequence after traversing the interval time. Therefore, the rationality of UE scheduling is improved, the resource utilization rate is effectively improved and the system burden is reduced under the condition that normal scheduling and use of the UE are not influenced.
Referring to fig. 2, a block diagram of a scheduling apparatus according to an embodiment of the present invention is shown, and the scheduling apparatus is applied to a satellite mobile communication system, and specifically includes the following modules:
a setting module 201, configured to preset two or more UE groups, and set traversal interval time according to the number of the UE groups and a frame length in a satellite mobile communication system;
a traversing module 202, configured to traverse, at each frame start time, the first UE group according to an arrangement order of two or more UE groups, so as to detect whether a downlink data packet to be sent exists in the first UE group;
a sending module 203, configured to send a downlink data packet if the downlink data packet is received;
the traversing module 202 is further configured to sequentially traverse the UE groups according to the arrangement order through the traversal interval time.
In a preferred embodiment of the present invention, the apparatus may further comprise:
and an allocating module (not shown in the figure), configured to, if it is monitored that a new UE accessing the satellite mobile communication system currently exists, allocate the new UE to a target UE group of two or more UE groups, and record UE information corresponding to the new UE and a corresponding relationship between the UE information and the target UE group.
In a preferred embodiment of the present invention, the allocation module may be further configured to:
detecting the number of UE contained in each UE group of two or more UE groups;
and according to the number of the UE, allocating the new UE to the UE group containing the least number of the UE.
In a preferred embodiment of the present invention, traversal module 202 may be further configured to:
traversing the UE group at the head according to the locally stored UE information of all the UEs and the corresponding relation between the UE information of all the UEs and two or more UE groups.
In a preferred embodiment of the present invention, the traversing module 202 may be further configured to traverse the UE group located at the head again after traversing the last UE group according to the ranking order.
In summary, the apparatus in the embodiment of the present invention sets two or more UE groups in advance, and sets the traversal interval time according to the number of the UE groups and the frame length in the satellite mobile communication system; traversing the UE group at the head according to the arrangement sequence of two or more UE groups at the initial time of each frame to detect whether a downlink data packet needing to be sent exists in the UE group at the head; if yes, sending a downlink data packet; and traversing each UE group in sequence according to the arrangement sequence after traversing the interval time. Therefore, the rationality of UE scheduling is improved, the resource utilization rate is effectively improved and the system burden is reduced under the condition that normal scheduling and use of the UE are not influenced.
For the apparatus embodiment, since it is basically similar to the method embodiment, the description is simple, and for the relevant points, refer to the partial description of the method embodiment.
The embodiments in the present specification are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
Embodiments of the invention may be described in the general context of computer-executable instructions, such as program modules, being executed by a computer. Generally, program modules include routines, programs, objects, components, data structures, etc. that perform particular tasks or implement particular abstract data types. The invention may also be practiced in distributed computing environments where tasks are performed by remote processing devices that are linked through a communications network. In a distributed computing environment, program modules may be located in both local and remote computer storage media including memory storage devices.
Finally, it should also be noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The scheduling method and apparatus provided by the present invention are introduced in detail, and a specific example is applied in the text to explain the principle and the implementation of the present invention, and the description of the above embodiment is only used to help understanding the method and the core idea of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.

Claims (6)

1. A scheduling method applied to a satellite mobile communication system, the method comprising:
presetting two or more UE groups, and setting traversing interval time according to the number of the UE groups and the frame length in the satellite mobile communication system so as to finish scanning all the UE within the frame length and finish traversing and scheduling operation of the UE groups within the corresponding time period of each UE group;
traversing the UE group at the head according to the arrangement sequence of the two or more UE groups at the initial time of each frame to detect whether a downlink data packet needing to be sent exists in the UE group at the head;
if yes, the downlink data packet is sent;
sequentially traversing each UE group according to the arrangement sequence after the traversing interval time;
if it is monitored that new UE accessed to the satellite mobile communication system exists currently, the new UE is allocated to a target UE group in the two or more UE groups, and UE information corresponding to the new UE and a corresponding relation between the UE information and the target UE group are recorded;
wherein the step of allocating the new UE to a target UE group of the two or more UE groups specifically includes:
detecting the number of UEs included in each of the two or more UE groups;
and distributing the new UE to a UE group with the least UE number according to the UE number.
2. The method according to claim 1, wherein the step of traversing the first UE group according to the arrangement order of the two or more UE groups at the start time of each frame specifically comprises:
traversing the UE group at the head according to the locally stored UE information of all the UEs and the corresponding relation between the UE information of all the UEs and the two or more UE groups.
3. The method of claim 1, further comprising:
and traversing the UE group positioned at the head position again if the last UE group is traversed according to the arrangement sequence.
4. A scheduling apparatus, the apparatus being applied to a satellite mobile communication system, the apparatus comprising:
the device comprises a setting module, a scheduling module and a scheduling module, wherein the setting module is used for presetting two or more UE groups, and setting traversal interval time according to the number of the UE groups and the frame length in the satellite mobile communication system so as to complete scanning of all UE within the frame length and complete traversal and scheduling operation of the UE groups within the corresponding time period of each UE group;
a traversing module, configured to traverse the first UE group according to the arrangement order of the two or more UE groups at each frame starting time, so as to detect whether a downlink data packet to be sent exists in the first UE group;
a sending module, configured to send the downlink data packet if the downlink data packet is received;
the traversing module is further used for sequentially traversing each UE group according to the arrangement sequence after the traversing interval time;
the distribution module is used for distributing the new UE to a target UE group in the two or more UE groups and recording UE information corresponding to the new UE and a corresponding relation between the UE information and the target UE group if the situation that the new UE accessed to the satellite mobile communication system currently exists is monitored;
the allocation module is further to:
detecting the number of UEs included in each of the two or more UE groups;
and distributing the new UE to a UE group with the least UE number according to the UE number.
5. The apparatus of claim 4, wherein the traversal module is further configured to:
traversing the UE group at the head according to the locally stored UE information of all the UEs and the corresponding relation between the UE information of all the UEs and the two or more UE groups.
6. The apparatus of claim 4, wherein the traversing module is further configured to traverse the first UE group again if the last UE group is traversed according to the ranking order.
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