Downlink resource control method for satellite hopping beam

Abstract

According to the downlink resource control method of the satellite hopping beam, downlink resource control is carried out by the control equipment, and three-dimensional information of a user terminal, time slot configuration and time slot pointing is converted into operation of downlink time slot table query and downlink terminal queue reading. According to the method, the capability of each downlink time slot can be fully utilized, dynamically changing downlink resource attribution and normal terminal data packet maintenance are separated, and the method is suitable for a satellite communication system, convenient to operate, high in operability and suitable for industrial use and popularization.

Description

Technical Field

[0001] The invention belongs to the field of satellite communications, and in particular relates to a downlink resource control method for satellite beam hopping. Background Art

[0002] In the satellite beam hopping scenario, the beam hopping must be changed according to the resource allocation result, and the capacity of the downlink time slot must match the terminal capacity. Therefore, the downlink resource control of beam hopping must take into account the terminal position, terminal capacity and time slot attributes. Therefore, it is very important to design a convenient and feasible beam hopping downlink resource control method suitable for satellite communication systems.

[0003] In the prior art, there are already multiple satellite systems with autonomous onboard resource allocation capabilities. Due to the fixed beam coverage of satellites, the target area will be covered by beams when the terminal moves. When the terminal crosses beams, it only needs to allocate resources at the target wave position through the satellite to ensure continuous service. Due to the characteristics of beam hopping covering the specified wave position in time-sharing, the existing cross-beam resource allocation scheme is not applicable. Summary of the invention

[0004] The purpose of the present invention is to provide a satellite beam-hopping downlink resource control method to solve the problem of lack of a convenient and feasible beam-hopping downlink resource control method in the prior art.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions to achieve the above problems:

[0006] A satellite beam hopping downlink resource control method comprises the following steps:

[0007] Step 1, the control device generates a satellite beam hopping downlink time slot table according to the attributes of the user terminal applying for satellite beam hopping downlink resources;

[0008] Step 2: The control device obtains the user terminal to which each downlink time slot belongs according to the downlink time slot table, reads the data packet to be sent of the user terminal corresponding to each downlink time slot, and assembles the data packet of each downlink time slot into complete downlink data in sequence;

[0009] Step 3: The control device sends downlink data to the satellite beam-hopping downlink at the beginning of each downlink cycle.

[0010] The present invention also has the following features:

[0011] Furthermore, the control device includes a satellite-borne control device or a ground-based control device.

[0012] Furthermore, in step 1, the attributes of the user terminal include a receiving rate level and a terminal location.

[0013] Furthermore, in step 3, when any user terminal has no downlink data to be sent, the downlink of the satellite beam hopping points to the beam where the terminal is located in the time slot corresponding to the terminal.

[0014] Furthermore, in step 3, the satellite beam-hopping downlink adopts a single-carrier TDM method.

[0015] Compared with the prior art, the present invention has the following technical effects:

[0016] The satellite beam-hopping downlink resource control method of the present invention controls the downlink resources by a control device, converting the three-dimensional information of the user terminal, time slot configuration and time slot pointing into downlink time slot table query and downlink terminal queue reading operations. This method can fully utilize the capacity of each downlink time slot, and independently separate the dynamically changing downlink resource ownership from the normal terminal data packet maintenance. It is suitable for satellite communication systems, easy to operate, highly operable, and suitable for industrial use and promotion. DETAILED DESCRIPTION

[0017] It should be noted that, unless otherwise specified, all components in the present invention are components known in the prior art. For example, the satellite-borne control device is a known and commonly used satellite-borne control device.

[0018] Specific embodiments of the present invention are given below. It should be noted that the present invention is not limited to the following specific embodiments, and all equivalent changes made on the basis of the technical solution of this application fall within the protection scope of the present invention.

[0019] A satellite beam hopping downlink resource control method comprises the following steps:

[0020] Step 1: The control device generates a satellite beam hopping downlink time slot table according to the attributes of the user terminal applying for satellite beam hopping downlink resources;

[0021] Step 2: The control device obtains the user terminal to which each downlink time slot belongs according to the downlink time slot table, reads the data packet to be sent of the user terminal corresponding to each downlink time slot, and assembles the data packet of each downlink time slot into complete downlink data in sequence;

[0022] Step 3: The control device sends the downlink data to the downlink of the satellite hopping beam at the beginning of each downlink cycle, thereby completing the downlink resource control of the satellite hopping beam.

[0023] Specifically, the control device includes a satellite-borne control device or a ground-based control device.

[0024] Specifically, the attributes of the user terminal include a receiving rate level and a terminal location.

[0025] Furthermore, in step 3, when any user terminal has no downlink data to be sent, the downlink of the satellite beam hopping points to the beam where the terminal is located in the time slot corresponding to the terminal.

[0026] A specific embodiment is given below:

[0027] The satellite beam-hopping downlink adopts a single-carrier TDM method with a period of T. The onboard control equipment or the ground control equipment allocates the downlink time slot to the user terminal according to actual needs.

[0028] There are M downlink time slots in total, which are represented as: time slot 1, time slot 2, ..., time slot M.

[0029] The control device allocates downlink resources according to the attributes of the user terminal, the terminal attributes include the receiving rate level of the terminal and the terminal position; the downlink resources include downlink time slots. The downlink time slot table shown in Table 1 can be generated. For example, according to the receiving rate level k of terminal s and the corresponding terminal position, the time slots i and i+1 that meet the requirements are allocated to terminal s, and the control device configures the rate of time slot i to the rate level k corresponding to terminal s, and time slot i and time slot i+1 point to the position where terminal s is located.

[0030]

[0031] Table 1 Downlink time slot table

[0032] Secondly, the control device determines the user terminal to which each downlink time slot belongs according to the downlink time slot table. According to conventional knowledge in the art, the queue of each user terminal includes multiple data packets, as shown in Table 2, and each downlink time slot is sequentially assembled into complete downlink data according to the period of the downlink of the satellite hopping beam according to the data packets of the corresponding user terminal.

[0033] Terminal ID queue User terminal 1 Packet 1,2 User terminal 2 Packet 1, 2, 3 User terminal 3 Packet 1,2 …… …… …… …… User Terminals Packet 1, 2

[0034] Table 2 User terminal queue list

[0035] Next, the control device sends all downlink data to the downlink of the satellite hopping beam. After the downlink data is sent to the downlink of the satellite hopping beam, the user terminal can receive it. Finally, multiple user terminals receive and process their corresponding downlink data.

Claims

1. A satellite beam hopping downlink resource control method, characterized in that: The following steps are involved: Step 1, the control device generates a satellite beam hopping downlink time slot table according to the attributes of the user terminal applying for satellite beam hopping downlink resources; Step 2: The control device obtains the user terminal to which each downlink time slot belongs according to the downlink time slot table, reads the data packet to be sent of the user terminal corresponding to each downlink time slot, and assembles the data packet of each downlink time slot into complete downlink data in sequence; Step 3: The control device sends downlink data to the satellite beam-hopping downlink at the beginning of each downlink cycle.

2. The satellite beam hopping downlink resource control method according to claim 1, characterized in that: The control device includes a satellite-borne control device or a ground-based control device.

3. The satellite beam hopping downlink resource control method according to claim 1, characterized in that: In step 1, the attributes of the user terminal include a receiving rate level and a terminal location.

4. The satellite beam hopping downlink resource control method according to claim 1, characterized in that: In step 3, when any user terminal has no downlink data to be sent, the downlink of the satellite beam hopping points to the beam where the terminal is located in the time slot corresponding to the terminal.

5. The satellite beam hopping downlink resource control method according to claim 1, characterized in that: In step 3, the satellite beam-hopping downlink adopts a single-carrier TDM method.

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