CN114828250A - Wireless resource allocation method based on satellite mobile communication system - Google Patents
Wireless resource allocation method based on satellite mobile communication system Download PDFInfo
- Publication number
- CN114828250A CN114828250A CN202210293441.XA CN202210293441A CN114828250A CN 114828250 A CN114828250 A CN 114828250A CN 202210293441 A CN202210293441 A CN 202210293441A CN 114828250 A CN114828250 A CN 114828250A
- Authority
- CN
- China
- Prior art keywords
- time
- time slot
- time slots
- downlink
- uplink
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/50—Allocation or scheduling criteria for wireless resources
- H04W72/53—Allocation or scheduling criteria for wireless resources based on regulatory allocation policies
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/14—Relay systems
- H04B7/15—Active relay systems
- H04B7/185—Space-based or airborne stations; Stations for satellite systems
- H04B7/1851—Systems using a satellite or space-based relay
- H04B7/18519—Operations control, administration or maintenance
-
- 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
- H04W72/0453—Resources in frequency domain, e.g. a carrier in FDMA
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/20—Control channels or signalling for resource management
- H04W72/21—Control channels or signalling for resource management in the uplink direction of a wireless link, i.e. towards the network
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/20—Control channels or signalling for resource management
- H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Astronomy & Astrophysics (AREA)
- Aviation & Aerospace Engineering (AREA)
- General Physics & Mathematics (AREA)
- Mobile Radio Communication Systems (AREA)
- Radio Relay Systems (AREA)
Abstract
The invention provides a wireless resource allocation method based on a satellite mobile communication system, which solves the problems of time slot fragment defect and low resource allocation efficiency caused by time bias problem in the traditional satellite wireless resource allocation. The method comprises the following steps: generating different downlink time slot block templates according to different initial time slots; distributing downlink channel time frequency resources according to the downlink time slot block template; generating an uplink time slot block template according to the downlink initial time slot of the distributed downlink channel time frequency resource and the system fixed time offset; and allocating uplink channel time-frequency resources according to the uplink time slot block template.
Description
Technical Field
The invention belongs to the technical field of wireless communication measurement, and relates to a wireless resource allocation method based on a satellite mobile communication system.
Background
With the continuous development of modern mobile communication technology and computer technology, satellite mobile communication is also rapidly developed and becomes a research hotspot at home and abroad; compared with land mobile communication, satellite mobile communication has a series of advantages of wide coverage range, wide frequency band, no limitation of geographical conditions and the like, but also faces huge challenges of how to improve user capacity by using limited wireless bandwidth resources, how to solve the problem of uncertain transmission delay of air interfaces caused by different positions of terminals, and how to realize quick allocation of resources to improve system response time; the above problems essentially require that the system rapidly and efficiently schedules limited wireless resources to reduce time slot fragments and improve resource utilization and resource allocation efficiency under the condition of satisfying the time offset constraint condition.
At present, although a few organizations have proposed satellite communication resource scheduling methods, none of them solve the problem, for example:
the disclosure number is CN105722236A, the invention is named as a resource allocation method supporting full-duplex D2D communication in a cellular network, on the premise of the service quality requirement of a cellular user, the minimum requirement of D2D link communication is also ensured, the resource allocation relation of the cellular user and the D2D user in the system is equivalent to the vertex pairing relation in the graph theory, the maximum weight matching algorithm in the graph theory is utilized to reasonably allocate wireless resources between the D2D user pair and the cellular user, the interference between the cellular user and the D2D user is effectively reduced, better fairness is obtained, and the throughput of the system is maximized. However, the patent cannot support full-duplex and half-duplex wireless resource allocation, and cannot solve the problems of time slot fragmentation and low allocation efficiency according to fixed time offset calculation and resource scheduling algorithm optimization.
Disclosure of Invention
The invention aims to provide a wireless resource allocation method based on a satellite mobile communication system, which solves the problems of time slot fragment defect and low resource allocation efficiency caused by time bias problem in the traditional satellite wireless resource allocation.
The invention is realized by the following technical scheme.
A wireless resource allocation method based on a satellite mobile communication system comprises the following steps:
generating different downlink time slot block templates according to different initial time slots; distributing downlink channel time frequency resources according to the downlink time slot block template; generating an uplink time slot block template according to the downlink initial time slot of the distributed downlink channel time frequency resource and the system fixed time offset; and allocating uplink channel time-frequency resources according to the uplink time slot block template.
The invention has the beneficial effects that:
the invention adopts a fixed time offset calculation method to realize that all time slots of the carrier can be fully utilized, thereby solving the problem of carrier time slot fragmentation and improving the resource utilization rate; meanwhile, the fixed time offset calculation method reduces the repetitive calculation during resource allocation and improves the resource allocation efficiency. Meanwhile, the invention adopts a matching strategy of creating and allocating time slot module, supports the high-efficiency scheduling of multi-beam resources, can quickly traverse the resource pool, and greatly improves the scheduling timeliness of system resources.
Drawings
Fig. 1 is a flowchart of a radio resource allocation method according to an embodiment of the present invention.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings.
First, terms appearing in the present embodiment will be explained:
transmission delay: the time during which the message sent by the terminal is transmitted to the ground gateway station via the satellite.
Time bias: the transmission delay caused by the position of the terminal outside the central point of the beam deviating from the central point of the beam is referred to.
As shown in fig. 1, a method for allocating radio resources based on a satellite mobile communication system according to this embodiment specifically includes:
step one, generating different downlink time slot block templates according to different initial time slots;
in specific implementation, the downlink time slot module adopts binary representation; when searching resources, the template is used for being sequentially matched with the resource blocks in the resource pool, and compared with a mode of comparing single time slot successively, the method greatly improves the searching speed of the resources and the efficiency of resource scheduling.
In this embodiment, 40 timeslots in a frame 1, each timeslot can be used as an initial timeslot, and to ensure that the initial timeslot is a multiple of the channel length, the initial timeslot of the downlink timeslot block template is set to be a multiple of 8, that is, 5 types of timeslot block templates are generated:
the first is a template with 0-7 time slots marked as available time slots and 7-39 time slots marked as unavailable time slots;
the second is a template with 8-15 time slots marked as available time slots and 0-7 and 16-39 time slots marked as unavailable time slots;
the third is a template with 16-23 time slots marked as available time slots and 0-15 and 24-39 time slots marked as unavailable time slots;
the fourth is a template which marks 24-31 time slots as usable time slots and marks 0-23 and 32-39 time slots as unusable time slots;
the fifth is a template which marks 32-39 time slots as available time slots and marks 0-31 time slots as unavailable time slots;
secondly, distributing time frequency resources of a downlink channel according to the downlink time slot block template;
in this embodiment, the time-frequency resource pool of each beam is an N × F matrix pool, N represents the maximum number of time slots in a frame, that is, N is 40, and F represents the total number of reusable frequency points in the beam, that is, the maximum number of frequency points available for allocation; when time frequency resources are distributed, selecting a corresponding time frequency resource pool according to terminal request parameters, matching the time frequency resource pool with a downlink time slot block template, wherein the successfully matched resources are the distributed downlink time frequency resources.
The downlink time slot block template is matched with the time frequency resource pool in the following mode: the transverse time slot resource matching is firstly adopted, then the longitudinal frequency point resource traversal matching sequence is adopted, namely, 40 time slots on a single frequency point are preferentially matched, and when the matching is unsuccessful, the longitudinal frequency point resource traversal matching sequence is longitudinally matched with 40 time slots on the next frequency point.
For example: for the frequency point f1, firstly, matching the time slot block template 1 with the f1, if the matching is successful, successfully allocating downlink resources, and allocating resources to be 0-7 time slots of the frequency point f1, finishing resource searching, if the matching is failed, matching the time slot block template 2 with the f1, and so on, if the matching of the time slot block template 5 with the f1 is failed, selecting the next frequency point f2 of f1, and matching the downlink time slot block templates 1-5 with the f2 in sequence, and repeating the steps until the downlink resources are successfully matched; and if all resources in the traversal downlink resource pool are failed to be matched with the downlink time slot block templates 1-5, the resource allocation is failed, and the resource search is finished.
Step three, generating an uplink time slot block template according to the downlink initial time slot of the distributed downlink channel time frequency resource and the system fixed time offset;
the generating of the uplink time slot block template specifically comprises: and adding the fixed time offset of the system to the downlink starting time slot to obtain the starting position of the available time slot of the uplink time slot block template, marking the starting position and the 7-bit time slot behind the starting position as the available time slot, and marking the rest part in the 0-39 time slots as the unavailable time slot, thereby forming the uplink time slot block template.
In this embodiment, the system fixed time offset is calculated in the following manner:
calculating the beam center time offset M according to system parameters, and calculating the fixed time offset according to the following formula on the premise that the half-duplex terminal needs at least J protection time slots:
T offset ＝(2*L+N-M/L*L)％N
wherein, N represents a frame and totally N time slots, L represents that DTCH channel occupies L time slots, wherein L > J, said DTCH represents the specialized traffic channel, the time slot length that the channel occupies is determined according to the difference of the system while implementing specifically, mainly used for bearing the weight of voice and data information.
In specific implementation, for half-duplex terminal services, the limitation of constraint conditions is considered when uplink resource allocation is performed, that is, time slots are not overlapped; for the full-duplex terminal service, the constraint condition can be selected to be absent, or the constraint condition is also considered in order to reduce the complexity of resource allocation and improve the resource utilization rate, so that a set of resource allocation method is adopted for the half-duplex terminal service and the full-duplex terminal service.
Step four, distributing the time frequency resource of the uplink channel according to the uplink time slot block template;
in this embodiment, the uplink time-frequency resource pool is an N × a matrix pool, N represents a maximum time slot number of a frame, that is, N is 40, and a represents a total number of reusable frequency points under the beam, that is, a maximum number of frequency points of the uplink resource for allocation; when time frequency resources are distributed, the corresponding uplink time frequency resource pool is selected according to the terminal request parameters, an uplink time slot block template is matched with the resource pool, and the successfully matched resources are the distributed uplink time frequency resources.
The matching of the uplink time slot block template and the resource pool specifically adopts the following mode: when the uplink resources are matched, the longitudinal frequency point resources are directly traversed and matched, namely when a certain frequency point is not matched with the uplink time slot module, the next frequency point of the frequency point is matched with the uplink time slot module.
For example: for the frequency point a1, firstly, an uplink time slot block template is matched with a1, if the matching is successful, uplink resource allocation is successful, the allocated resource is 24-31 time slots of the frequency point f1, the uplink resource searching is finished, and if the matching is failed, the uplink time slot block template is matched with a 2; and repeating the steps until the uplink resources are successfully matched. If all resources in the traversal resource pool are failed to be matched with the uplink time slot block template, the resource searching is finished, and the resource allocation is failed.
In summary, the above description is only a preferred example of the present invention, and is not intended to limit the scope of the present invention. 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 (8)
1. A method for allocating radio resources based on a satellite mobile communication system, comprising:
generating different downlink time slot block templates according to different initial time slots; distributing downlink channel time frequency resources according to the downlink time slot block template; generating an uplink time slot block template according to the downlink initial time slot of the distributed downlink channel time frequency resource and the system fixed time offset; and allocating uplink channel time-frequency resources according to the uplink time slot block template.
2. The method of claim 1, wherein the downlink timeslot block template is represented by a binary representation.
3. The method as claimed in claim 1 or 2, wherein the starting time slot of the downlink time slot block template is a multiple of 8, that is, the generated time slot block templates have 5 types:
the first is a template with 0-7 time slots marked as available time slots and 7-39 time slots marked as unavailable time slots;
the second is a template with 8-15 time slots marked as available time slots and 0-7 and 16-39 time slots marked as unavailable time slots;
the third is a template with 16-23 time slots marked as available time slots and 0-15 and 24-39 time slots marked as unavailable time slots;
the fourth is a template which marks 24-31 time slots as usable time slots and marks 0-23 and 32-39 time slots as unusable time slots;
the fifth is a template with 32-39 time slots marked as available time slots and 0-31 time slots marked as unavailable time slots.
4. The method for allocating radio resources according to claim 3, wherein the allocating downlink channel time-frequency resources specifically comprises: selecting a corresponding time frequency resource pool according to the terminal request parameters, matching the time frequency resource pool with a downlink time slot block template, wherein the successfully matched resource is the allocated downlink time frequency resource; the time frequency resource pool of each wave beam is a matrix pool of N x F, N represents the maximum time slot number of a frame, and F represents the total number of the reusable frequency points under the wave beam, namely the maximum number of the frequency points for distribution.
5. The method of claim 4, wherein the downlink time slot block template is used to match the time-frequency resource pool by: the transverse time slot resource matching is firstly adopted, then the longitudinal frequency point resource traversal matching sequence is adopted, namely, 40 time slots on a single frequency point are preferentially matched, and when the matching is unsuccessful, the longitudinal frequency point resource traversal matching sequence is longitudinally matched with 40 time slots on the next frequency point.
6. The method for allocating radio resources in a satellite-based mobile communication system according to claim 5, wherein the generating of the uplink timeslot block template specifically comprises: and adding the fixed time offset of the system to the downlink starting time slot to obtain the starting position of the available time slot of the uplink time slot block template, marking the starting position and the 7-bit time slot behind the starting position as the available time slot, and marking the rest part in the 0-39 time slots as the unavailable time slot, thereby forming the uplink time slot block template.
7. The method of claim 6, wherein the system fixed time offset is calculated as follows:
calculating the beam center time offset M according to system parameters, and calculating the fixed time offset according to the following formula on the premise that the half-duplex terminal needs at least J protection time slots:
T offset ＝(2*L+N-M/L*L)％N
wherein, N represents a frame with N time slots, L represents that DTCH channel occupies L time slots, wherein L is more than J, and the DTCH represents a special traffic channel.
8. The method as claimed in claim 6 or 7, wherein the step of using the uplink timeslot block template to match the resource pool is performed by: when the uplink resources are matched, the longitudinal frequency point resources are directly traversed and matched, namely when a certain frequency point is not matched with the uplink time slot module, the next frequency point of the frequency point is matched with the uplink time slot module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210293441.XA CN114828250A (en) | 2022-03-23 | 2022-03-23 | Wireless resource allocation method based on satellite mobile communication system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210293441.XA CN114828250A (en) | 2022-03-23 | 2022-03-23 | Wireless resource allocation method based on satellite mobile communication system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114828250A true CN114828250A (en) | 2022-07-29 |
Family
ID=82530310
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210293441.XA Pending CN114828250A (en) | 2022-03-23 | 2022-03-23 | Wireless resource allocation method based on satellite mobile communication system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114828250A (en) |
-
2022
- 2022-03-23 CN CN202210293441.XA patent/CN114828250A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US7920887B2 (en) | System and method for setting up P2P communication group in cellular system, and P2P communication system and method using P2P communication group | |
| US20210212104A1 (en) | Methods and apparatuses for transmitting and configuring sidelink data | |
| WO2017128275A1 (en) | Method for transmitting data via sidelink and terminal | |
| JP4680046B2 (en) | Dynamic channel allocation method and dynamic channel allocation apparatus | |
| EP2713668B1 (en) | Signaling to enable network controlled tethering of wireless devices | |
| CN110383866B (en) | Method, device and system for directly connecting link resource configuration and readable storage medium | |
| US20070121531A1 (en) | Hybrid wireless communication system and communication method using the same | |
| CN107979872B (en) | Multi-frequency time division multiple access system and method based on directional antenna | |
| US9037147B2 (en) | Network controlled tethering of wireless devices | |
| CN103199969B (en) | Process hybrid automatic repeat request and confirm method and the communication device of payment received response | |
| US8385247B2 (en) | Communication systems and methods with resource management for overlapping multicast and broadcast service zones | |
| CN109845312B (en) | Data transmission method and device, computer equipment and system | |
| CN112994759B (en) | Cooperative relay D2D communication method based on OFDM | |
| JP2013535910A (en) | Bidirectional communication method and communication network in cellular phone communication network | |
| CN111556480B (en) | Method and system for sharing distributed network element by multiple operators | |
| CN105025578A (en) | Method for utilizing television frequency band white space spectrums in Internet of vehicles | |
| CN103945386B (en) | The hollow time-frequency three dimensional resource distribution method of Ad Hoc networks | |
| CN114828250A (en) | Wireless resource allocation method based on satellite mobile communication system | |
| US20220337350A1 (en) | Data transmission method, apparatus and device | |
| CN110178404B (en) | Resource use method, related device and system | |
| CN111918333B (en) | Data transmission method and equipment | |
| CN116156431A (en) | Broadcast beam hopping method, satellite beam hopping device and interference coordinator | |
| CN102457857A (en) | Method for selecting resident sub-band and base station | |
| CN105188025A (en) | Method and system for sending positioning reference signals | |
| CN100479595C (en) | Soft switchover resource allocating method and system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |