CN113692053A - Resource allocation method, system, base station and terminal based on DVB system - Google Patents
Resource allocation method, system, base station and terminal based on DVB system Download PDFInfo
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- CN113692053A CN113692053A CN202110916182.7A CN202110916182A CN113692053A CN 113692053 A CN113692053 A CN 113692053A CN 202110916182 A CN202110916182 A CN 202110916182A CN 113692053 A CN113692053 A CN 113692053A
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- 238000013468 resource allocation Methods 0.000 title claims abstract description 21
- 230000011664 signaling Effects 0.000 claims abstract description 23
- 230000005540 biological transmission Effects 0.000 abstract description 5
- 230000003993 interaction Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/20—Control channels or signalling for resource management
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
- H04W72/044—Wireless resource allocation based on the type of the allocated resource
- H04W72/0446—Resources in time domain, e.g. slots or frames
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/50—Allocation or scheduling criteria for wireless resources
- H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria
- H04W72/543—Allocation or scheduling criteria for wireless resources based on quality criteria based on requested quality, e.g. QoS
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Abstract
The invention provides a resource allocation method, a system, a base station and a terminal based on a DVB system, wherein the resource allocation method comprises the following steps: the satellite base station defines a service distribution descriptor carrying service distribution resource indication and sends the service distribution descriptor to the satellite terminal; the satellite terminal receives the service allocation descriptor from the satellite base station, analyzes the service allocation resource indication from the received service allocation descriptor, and then sends uplink data according to the analyzed service allocation resource indication. In the resource allocation method of the invention, the satellite base station can meet the requirement of continuous uplink data transmission of the terminal by only once resource scheduling, thereby reducing the number of times of signaling resource scheduling, and achieving the purposes of saving air interface signaling resources and improving signaling capacity.
Description
Technical Field
The present invention relates to the field of information technology, and in particular, to a method, a system, a base station, and a terminal for resource allocation based on a DVB system.
Background
The data interaction flow between the satellite base station and the satellite terminal in the DVB-RCS2 system is as shown in the following FIG. 1. The satellite terminal starts logging in an IDLE state, after Ctrl PDU (realizing fine synchronization) is sent, the satellite terminal enters a CONNECT state, the satellite base station carries out resource indication by sending TBTP2 control signaling, single superframe service resources on a reverse link are distributed, and the satellite terminal sends data packets on the corresponding superframe service resources, so that data connection is maintained.
As shown in fig. 2, the TBTP2 control signaling supported by the DVB-RCS2 original protocol only allocates air interface service timeslot resources with a single hyper frame number (for example, a single reverse hyper frame number is indicated by a super frame _ count in fig. 2) by the TBTP2 control signaling sent by the satellite base station, so that the satellite base station needs to allocate a super frame service resource to the satellite terminal through the TBTP2 control signaling once in each super frame.
When the satellite terminal has continuous uplink service, the satellite base station needs to send a TBTP2 control signaling for each uplink scheduling to allocate superframe service resources, and in consideration of large coverage area and many service users of the space satellite base station, the existing mechanism performs resource scheduling on each uplink data of each user by using a dedicated signaling, so that the signaling resource consumption is large, and the processing capability of the space satellite base station is challenged.
Disclosure of Invention
The invention aims to provide a resource allocation method, a resource allocation system, a base station and a terminal based on a DVB system so as to reduce the number of times of signaling resource scheduling.
The invention provides a resource allocation method based on a DVB system, which comprises the following steps:
the satellite base station defines a service distribution descriptor carrying service distribution resource indication and sends the service distribution descriptor to the satellite terminal;
the satellite terminal receives the service allocation descriptor from the satellite base station, analyzes the service allocation resource indication from the received service allocation descriptor, and then sends uplink data according to the analyzed service allocation resource indication.
Further, the service allocation resource indication carried in the service allocation descriptor includes a superframe sequence, a starting superframe number, a superframe service period, the number of service-sustained superframes in the superframe service period, and a service slot number.
Furthermore, the service allocation resource indication carried in the service allocation descriptor defined by the satellite base station is allocated according to the uplink QOS registered by the satellite terminal.
Further, the satellite base station sends the service distribution descriptor to the satellite terminal through TIM-U signaling.
The invention also provides a satellite base station based on the DVB system, wherein the satellite base station is used for defining a service distribution descriptor carrying the service distribution resource indication and sending the service distribution descriptor to the satellite terminal.
The invention also provides a satellite terminal based on the DVB system, wherein the satellite terminal is used for receiving the service distribution descriptor from the satellite base station, analyzing the service distribution resource indication from the received service distribution descriptor, and then sending uplink data according to the analyzed service distribution resource indication.
The invention also provides a DVB system, which comprises a satellite base station and a satellite terminal; and the satellite base station and the satellite terminal perform resource allocation according to the resource allocation method.
In summary, due to the adoption of the technical scheme, the invention has the beneficial effects that:
in the resource allocation method of the invention, the satellite base station can meet the requirement of continuous uplink data transmission of the terminal by only once resource scheduling, thereby reducing the number of times of signaling resource scheduling, and achieving the purposes of saving air interface signaling resources and improving signaling capacity.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a data interaction flow diagram of a satellite base station and a satellite terminal of an original protocol of a DVB-RCS2 system.
Fig. 2 is a diagram showing TBTP2 control signaling supported by the original protocol of the DVB-RCS2 system.
Fig. 3 is a flowchart illustrating data interaction between a satellite base station and a satellite terminal in a DVB system-based resource allocation method according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
When the access of the satellite terminal reaches fine synchronization, in order to reduce the number of times of signaling resource scheduling, the satellite base station needs to allocate periodic air interface resources to the satellite terminal, that is, semi-persistent scheduling is performed on the satellite base station of the reverse link. Thus, the present invention replaces TBTP2 control signaling by defining a traffic allocation descriptor that carries a traffic allocation resource indication. Specifically, as shown in fig. 3, a method for allocating resources based on the DVB system includes:
the satellite base station defines a service distribution descriptor carrying service distribution resource indication and sends the service distribution descriptor to the satellite terminal; in the embodiment, the satellite base station sends the service distribution descriptor to the satellite terminal through the TIM-U signaling;
the satellite terminal receives the service allocation descriptor from the satellite base station, analyzes the service allocation resource indication from the received service allocation descriptor, and then sends uplink data according to the analyzed service allocation resource indication.
By using the resource allocation method, the satellite base station can meet the requirement of continuous uplink data transmission of the terminal only by once resource scheduling, thereby reducing the number of times of signaling resource scheduling, and achieving the purposes of saving air interface signaling resources and improving signaling capacity.
Furthermore, since the satellite base station is required to allocate periodic air interface resources to the satellite terminal according to the uplink QOS registered by the satellite terminal, the service allocation resource indication carried in the service allocation descriptor defined by the satellite base station is allocated according to the uplink QOS registered by the satellite terminal, thereby realizing flexible configuration of the service allocation resource indication carried in the service allocation descriptor.
Further, the service allocation resource indication carried in the service allocation descriptor includes a superframe sequence, a starting superframe number, a superframe service period, the number of service-sustained superframes in the superframe service period, and a service slot number. The present embodiment implements a service allocation descriptor as shown in table 1.
Table 1, service assignment descriptor definition:
the semantics of the traffic assignment descriptor traffic _ assign _ descriptor are as follows:
descriptor _ tag: this 8-bit field is used to identify the traffic assignment descriptor type.
descriptor _ length: this 8-bit field specifies the number of descriptor bytes immediately following the descriptor _ length field.
superframe _ sequence: this 8-bit field identifies the sequence of superframes that the satellite terminal uses for traffic data transmission.
assignment _ context: this 8-bit field indicates the allocation context in the traffic allocation descriptor.
assignment _ id _ count: this 8-bit field indicates the number of allocation IDs that allocate traffic slots in the following cycle.
assignment _ id: this 24-bit field indicates the allocation ID corresponding to the following allocation.
traffic _ start _ superframe _ count: this 16-bit field gives a superframe count value indicating the superframe in which the first traffic slot allocated is located.
consecutive _ superframe _ count: this 8-bit field gives the number of consecutive superframes in a repetition period to which the traffic slot is allocated. For example, a value of 1 indicates that there is only one superframe to which a traffic slot is assigned in one repetition period, a value of 2 indicates that there are two consecutive superframes to which a traffic slot is assigned in one repetition period, and so on.
traffic _ repeat _ period: this 8-bit field gives the repetition period of the traffic slot assignment in units of the duration of one reverse link superframe.
traffic _ frame _ number: the 8-bit field identifies the frame number of the frame in the superframe containing the service slot allocated to the satellite terminal;
traffic _ start _ time _ number: this 8-bit field identifies the number of the first traffic slot allocated to the satellite terminal in the superframe.
traffic _ timestore _ count: this 8-bit field identifies the number of consecutive traffic slots allocated to the satellite terminal in the superframe.
dynamic _ tx _ type: this 12-bit field indicates the type of transmission used in the traffic slot, consistent with the DVB original protocol.
traffic _ assign _ persistence: this 16-bit field indicates the duration of the traffic allocation, given as a multiple of the superframe duration. For example, a value of "0 xFFFF" indicates that there is no upper bound, and that it is valid until the connection with the satellite base station is released or until a new traffic assignment descriptor is received.
Example 2
The present embodiment implements a DVB system-based satellite base station, where the satellite base station is configured to define a service allocation descriptor carrying a service allocation resource indication, and send the service allocation descriptor to a satellite terminal.
When the satellite base station sends the service allocation descriptor to the satellite terminal, the satellite terminal can receive the service allocation descriptor from the satellite base station, analyze the service allocation resource indication from the received service allocation descriptor, and then send uplink data according to the analyzed service allocation resource indication.
Example 3
In this embodiment, a satellite terminal based on a DVB system is implemented, where when a satellite base station defines a service allocation descriptor carrying a service allocation resource indication and sends the service allocation descriptor to the satellite terminal, the satellite terminal is configured to receive the service allocation descriptor from the satellite base station, parse the service allocation resource indication from the received service allocation descriptor, and send uplink data according to the parsed service allocation resource indication.
Example 4
The DVB system comprises a satellite base station and a satellite terminal; the satellite base station and the satellite terminal perform resource allocation according to the resource allocation method described in embodiment 1. Specifically, the method comprises the following steps:
the satellite base station defines a service distribution descriptor carrying service distribution resource indication and sends the service distribution descriptor to the satellite terminal;
the satellite terminal receives the service allocation descriptor from the satellite base station, analyzes the service allocation resource indication from the received service allocation descriptor, and then sends uplink data according to the analyzed service allocation resource indication.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. A resource allocation method based on DVB system is characterized in that the resource allocation method comprises the following steps:
the satellite base station defines a service distribution descriptor carrying service distribution resource indication and sends the service distribution descriptor to the satellite terminal;
the satellite terminal receives the service allocation descriptor from the satellite base station, analyzes the service allocation resource indication from the received service allocation descriptor, and then sends uplink data according to the analyzed service allocation resource indication.
2. The method according to claim 1, wherein the service allocation resource indication carried in the service allocation descriptor includes a superframe sequence, a starting superframe number, a superframe service period, the number of service-sustaining superframes in the superframe service period, and a service slot number.
3. The method of claim 1, wherein the service allocation resource indication carried in the service allocation descriptor defined by the satellite base station is allocated according to uplink QOS registered by the satellite terminal.
4. The DVB system based resource allocation method according to claim 1, wherein the satellite base station transmits the service allocation descriptor to the satellite terminal via TIM-U signaling.
5. A DVB system based satellite base station, wherein the satellite base station is configured to define a service allocation descriptor carrying a service allocation resource indicator, and send the service allocation descriptor to a satellite terminal.
6. A satellite terminal based on DVB system, characterized in that the satellite terminal is configured to receive the service allocation descriptor from the satellite base station according to claim 5, and to parse the service allocation resource indication from the received service allocation descriptor, and then to transmit uplink data according to the parsed service allocation resource indication.
7. A DVB system, wherein the DVB system comprises a satellite base station and a satellite terminal; the satellite base station and the satellite terminal perform resource allocation according to the resource allocation method of any one of claims 1 to 4.
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