CN113923745B - Communication relay selection method for power communication system and communication method thereof - Google Patents
Communication relay selection method for power communication system and communication method thereof Download PDFInfo
- Publication number
- CN113923745B CN113923745B CN202111204846.3A CN202111204846A CN113923745B CN 113923745 B CN113923745 B CN 113923745B CN 202111204846 A CN202111204846 A CN 202111204846A CN 113923745 B CN113923745 B CN 113923745B
- Authority
- CN
- China
- Prior art keywords
- relay
- area
- communication
- relay node
- terminal
- 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.)
- Active
Links
Images
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W40/00—Communication routing or communication path finding
- H04W40/02—Communication route or path selection, e.g. power-based or shortest path routing
- H04W40/04—Communication route or path selection, e.g. power-based or shortest path routing based on wireless node resources
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W40/00—Communication routing or communication path finding
- H04W40/02—Communication route or path selection, e.g. power-based or shortest path routing
- H04W40/22—Communication route or path selection, e.g. power-based or shortest path routing using selective relaying for reaching a BTS [Base Transceiver Station] or an access point
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
The invention discloses a communication relay selection method of an electric power communication system, which comprises the steps of obtaining real-time parameters of the electric power communication system in an area to be analyzed; constructing a relay selection area by taking the distance between the target D2D terminal and the base station as the diameter and taking the midpoint of a line segment of a connecting line between the target D2D terminal and the base station as the center of a circle; judging whether a relay node exists in the relay selection area; dividing a plurality of concentric circles in the relay selection area and obtaining a plurality of sub-areas; selecting one subarea with a relay node from the subareas; and selecting one relay node to relay signals, and completing communication relay selection of the power communication system. The invention also discloses a communication method comprising the communication relay selection method of the power communication system. The invention greatly reduces the complexity of the system and the overall cost of the system, has better performance in the aspects of reliability and safety of signal transmission, and has wider application range and better practicability.
Description
Technical Field
The invention belongs to the technical field of power grid communication, and particularly relates to a communication relay selection method and a communication method of an electric power communication system.
Background
Along with the development of economic technology and the improvement of living standard of people, the electric energy is widely applied to the production and living of people, and brings endless convenience to the production and living of people. Therefore, ensuring stable and reliable supply of electric energy becomes one of the most important tasks of the electric power system.
The power communication system is an important component of the power system. Typical power services (such as distribution network automation, power consumption information acquisition, distributed power supply, accurate load control, power emergency communication, etc.) are not supported by the power communication system. At present, a communication carrying network of the power service is generally composed of a wired optical fiber private network and an eLTE power wireless private network; with the application and popularization of the fifth generation mobile communication technology (5G), the power communication network must also be compatible with the 5G network.
The Device to Device (D2D) technology is one of the key technologies of 5G, which enables a terminal to directly exchange data with a neighboring Device without passing through a base station. The D2D technology can remarkably improve the frequency spectrum utilization rate, improve the network capacity and reduce the signaling overhead between the terminal and the base station. Therefore, the power communication system necessarily has more and more communication terminals to access the 5G network.
However, most of the power communication terminals accessing to the 5G network are fixed, such as distribution network automation distributed terminals, household power consumption information acquisition terminals, power transmission and transformation state monitoring terminals, etc., while the coverage area of the 5G base station is limited, so that there is necessarily a power communication terminal partially located at the coverage edge of the 5G base station. The reliability of the power communication terminals cannot be guaranteed when the power communication terminals directly establish contact with the base station or perform data transmission with the base station under severe wireless environments. At this time, the relay link can be established by means of the D2D communication technology, and the communication quality of the power communication terminal is improved, so that reliable transmission of the power data is ensured.
The current commonly used D2D relay selection method mainly comprises the following steps: 1) The relay selection method based on the channel quality comprises the following steps: the D2D terminal detects the channel quality of the D2D communication link of each relay terminal, and selects the relay terminal with the highest channel quality as a preferred relay terminal, and the rest relay terminals are selected as alternatives; 2) The relay selection method based on the D2D neighbor terminal list comprises the following steps: each D2D terminal builds a neighbor terminal list for D2D communication in advance, the D2D terminal dynamically updates the priority order of the neighbor terminal list according to a preset strategy, and when D2D relay communication is required, the D2D terminal selects the terminal with the highest priority in the list as a relay terminal; 3) Dynamic D2D relay selection method based on relative speed: considering the future moving direction between potential relay terminals and the relative speed between the potential relay terminals and the D2D terminal, selecting the terminal with the highest contact stability with the D2D terminal as the relay terminal, and improving the stability of relay selection; 4) The network coding assisted multi-pair D2D communication relay selection method comprises the following steps: jointly considering the relay position, the communication content, the residual energy and the system capacity, and taking the relay position, the communication content, the residual energy and the system capacity as the basis of relay selection; 5) Optimal relay selection strategy based on Q learning method: updating a Q table of the D2D user pair by means of a Q learning algorithm in reinforcement learning, and converging the Q table after multiple iterations; and selects the best relay according to the Q table.
However, the above relay selection methods are all based on the assumption that the D2D terminal can obtain as much accurate information of the relay terminal as possible; therefore, the above methods have larger feedback overhead and more complex system complexity. In addition, in an actual network environment, because of estimation errors or feedback restrictions, the D2D terminal often cannot obtain accurate terminal positions and related state information, so the relay selection methods have the problems of poor practicality, small application range and the like.
Disclosure of Invention
One of the purposes of the invention is to provide a communication relay selection method of an electric power communication system, which has the advantages of lower system complexity, lower system overall cost, wide application range and good practicability.
Another object of the present invention is to provide a communication method including the communication relay selection method of the power communication system.
The communication relay selection method of the power communication system provided by the invention comprises the following steps:
s1, acquiring real-time parameters of a power communication system in an area to be analyzed;
s2, constructing a relay selection area by taking the distance between the target D2D terminal and the base station as the diameter and taking the midpoint of a line segment of a connecting line between the target D2D terminal and the base station as the center of a circle;
s3, judging whether a relay node exists in the relay selection area constructed in the step S2:
if the relay node does not exist, the target D2D terminal directly communicates with the base station, and the algorithm is ended;
if the relay node exists, continuing to carry out the subsequent steps;
s4, in the relay selection area constructed in the step S2, dividing a plurality of concentric circles by taking the midpoint of a line segment of a connecting line between the target D2D terminal and the base station as a circle center, so that the relay selection area constructed in the step S2 is divided into a plurality of sub-areas;
s5, selecting one subarea with the relay node from a plurality of subareas divided in the step S4;
s6, selecting one relay node to relay signals in the subarea selected in the step S5, so that communication relay selection of the power communication system is completed.
In the relay selection area constructed in step S2 in step S4, a plurality of concentric circles are divided by taking a midpoint of a line segment of a connection between the target D2D terminal and the base station as a center of a circle, so that the relay selection area constructed in step S2 is divided into a plurality of sub-areas, and specifically includes the following steps:
A. setting a relay node closest to a circle center as an optimal relay node in a relay selection area;
B. and C, when the best relay node selected in the step A is used for relay transmission, calculating the best communication reliability gain epsilon by adopting the following formula best ：
Where Pr (N (a) =k) is Poisson probability that there are k relays in the region a, and the calculation formula of Pr (N (a) =k) is
λ r The average relay number of unit area in the area A is shown, and the I A I is the area of the area A; />
Indicating the reliability gain obtainable when selecting the best relay node for relay transmission when there are k relay nodes in the relay selection area, and +.>
R is the radius of the relay selection area, d s Is the coordinates (x) s ,y s ) And coordinates (x) d ,y d ) The distance between them, mu is an intermediate variable, and
Γ s for the SIR threshold required for D2D terminals, α is the loss index, η of the general power law path loss model th Interference threshold value lambda for receiving signal of non-D2D terminal s For the density of D2D terminals lambda p For the base station density d p Is the distance Γ between the non-D2D terminal and the corresponding communication base station p Selecting SIR threshold values of other non-D2D terminals in the area for the relay;
C. the general calculation is performed by adopting the following calculation formulaReliability gain epsilon region (L)：
Where Pr (N (a) =k) is Poisson probability that there are k relays in the region a, and the calculation formula of Pr (N (a) =k) is
λ r The average relay number of unit area in the area A is shown, and the I A I is the area of the area A; />
When k relay nodes exist in the relay selection area, the method of the invention is adopted to select the reliability gain which can be obtained when the relay nodes perform relay transmission, and
m is the number of relay nodes in the ring closest to the center of the circle and having the relay nodes; n represents that the relay node selected when the relay node is selected for transmission is the relay node which is closest to the nth center of the circle in all the relay nodes; l is the index number of the divided concentric circles;
for the combination number formula->
i represents the ith ring; ψ (x) is the reliability gain calculation function of the single nth best relay, and +.>
j represents a j-th relay node extending outwards from an n-th best relay node in the relay selection area, and gamma (A, B) is an incomplete gamma function;
D. setting an acquirable communication reliability gain epsilon region (L) communication with the bestReliability gain epsilon best Beta ratio between them and through the formula epsilon region (L)＝β·ε best Reversely pushing to obtain the index L of the divided concentric circles;
E. and D, dividing the relay selection area into 2 according to the index L of the divided concentric circles obtained in the step D L Concentric circles with equal areas of adjacent circular rings.
In the step S5, among the plurality of sub-areas divided in the step S4, a sub-area having a relay node is selected, which specifically includes the following steps:
and selecting a subarea which is closest to the center of a circle and has a relay node from a plurality of subareas divided in the step S4.
In the sub-area selected in step S5, a relay node is selected for signal relay in step S6, and the method specifically includes the following steps:
in the sub-area selected in the step S5, if only one relay node exists, the relay node is directly selected for signal relay;
in the sub-area selected in step S5, if there are several relay nodes, randomly selecting one relay node from the several relay nodes to relay the signal.
The invention also discloses a communication method comprising the communication relay selection method of the power communication system, which comprises the following steps:
s7, carrying out data transmission of the power communication system according to the relay node selected in the step S6, thereby completing data communication of the power communication system.
According to the communication relay selection method and the communication method of the power communication system, the accurate relay terminal position and other information are not required to be obtained, and only one optimal relay node is required to be selected in the defined area to assist the D2D terminal to carry out communication and data transmission; therefore, the invention greatly reduces the complexity of the system and the overall cost of the system, has better performance in the aspects of reliability and safety of signal transmission, and has wider application range and better practicability.
Drawings
Fig. 1 is a flow chart of a relay selection method according to the present invention.
Fig. 2 is a flow chart of a communication method according to the present invention.
Detailed Description
Fig. 1 is a schematic flow chart of a relay selection method according to the present invention: the communication relay selection method of the power communication system provided by the invention comprises the following steps:
s1, acquiring real-time parameters of a power communication system in an area to be analyzed;
s2, constructing a relay selection area by taking the distance between the target D2D terminal and the base station as the diameter and taking the midpoint of a line segment of a connecting line between the target D2D terminal and the base station as the center of a circle;
in particular, when the coordinates are (x s ,y s ) D2D terminal and coordinates of (x) d ,y d ) Will be in coordinates when communicating with the base station of (a)
Is used as the center of a circle and is>
Making a circle for the radius and taking the circle as a relay selection area; wherein the method comprises the steps of
d s Is the coordinates (x) s ,y s ) And coordinates (x) d ,y d ) A distance therebetween;
s3, judging whether a relay node exists in the relay selection area constructed in the step S2:
if the relay node does not exist, the target D2D terminal directly communicates with the base station, and the algorithm is ended;
if the relay node exists, continuing to carry out the subsequent steps;
s4, in the relay selection area constructed in the step S2, dividing a plurality of concentric circles by taking the midpoint of a line segment of a connecting line between the target D2D terminal and the base station as a circle center, so that the relay selection area constructed in the step S2 is divided into a plurality of sub-areas; the method specifically comprises the following steps:
A. setting a relay node closest to a circle center as an optimal relay node in a relay selection area;
B. and C, when the best relay node selected in the step A is used for relay transmission, calculating the best communication reliability gain epsilon by adopting the following formula best ：
Where Pr (N (a) =k) is Poisson probability that there are k relays in the region a, and the calculation formula of Pr (N (a) =k) is
λ r The average relay number of unit area in the area A is shown, and the I A I is the area of the area A; />
Indicating the reliability gain obtainable when selecting the best relay node for relay transmission when there are k relay nodes in the relay selection area, and +.>
R is the radius of the relay selection area, d s Is the coordinates (x) s ,y s ) And coordinates (x) d ,y d ) The distance between them, mu is an intermediate variable, and
Γ s for the SIR threshold required for D2D terminals, α is the loss index, η of the general power law path loss model th Interference threshold value lambda for receiving signal of non-D2D terminal s For the density of D2D terminals lambda p For the base station density d p Is the distance Γ between the non-D2D terminal and the corresponding communication base station p Selecting SIR threshold values of other non-D2D terminals in the area for the relay;
C. the communication reliability gain epsilon is calculated by the following formula region (L)：
Where Pr (N (a) =k) is Poisson probability that there are k relays in the region a, and the calculation formula of Pr (N (a) =k) is
λ r The average relay number of unit area in the area A is shown, and the I A I is the area of the area A; />
When k relay nodes exist in the relay selection area, the method of the invention is adopted to select the reliability gain which can be obtained when the relay nodes perform relay transmission, and
m is the number of relay nodes in the ring closest to the center of the circle and having the relay nodes; n represents that the relay node selected when the relay node is selected for transmission is the relay node which is closest to the nth center of the circle in all the relay nodes; l is the index number of the divided concentric circles;
for the combination number formula->
i represents the ith ring; ψ (x) is the reliability gain calculation function of the single nth best relay, and +.>
j represents a j-th relay node extending outwards from an n-th best relay node in the relay selection area, and gamma (A, B) is an incomplete gamma function;
D. setting an acquirable communication reliability gainε region (L) gain ε of reliability of communication with optimum best Beta ratio between them and through the formula epsilon region (L)＝β·ε best Reversely pushing to obtain the index L of the divided concentric circles;
E. and D, dividing the relay selection area into 2 according to the index L of the divided concentric circles obtained in the step D L Concentric circles with equal areas of adjacent circular rings;
in the specific implementation, through verification, when L takes the verification value of 2, the reliability gain of 90% of the optimal relay can be obtained;
s5, selecting one subarea with the relay node from a plurality of subareas divided in the step S4; the method specifically comprises the following steps:
selecting a subregion closest to the circle center and provided with a relay node from a plurality of subregions divided in the step S4;
s6, selecting a relay node to relay signals in the subarea selected in the step S5, so as to finish communication relay selection of the power communication system; the method specifically comprises the following steps:
in the sub-area selected in the step S5, if only one relay node exists, the relay node is directly selected for signal relay;
in the sub-area selected in step S5, if there are several relay nodes, randomly selecting one relay node from the several relay nodes to relay the signal.
Fig. 2 is a schematic flow chart of a communication method according to the present invention: the communication method comprising the communication relay selection method of the power communication system provided by the invention further comprises the following steps:
s7, carrying out data transmission of the power communication system according to the relay node selected in the step S6, thereby completing data communication of the power communication system.
Claims (4)
1. A communication relay selection method of an electric power communication system includes the following steps:
s1, acquiring real-time parameters of a power communication system in an area to be analyzed;
s2, constructing a relay selection area by taking the distance between the target D2D terminal and the base station as the diameter and taking the midpoint of a line segment of a connecting line between the target D2D terminal and the base station as the center of a circle;
s3, judging whether a relay node exists in the relay selection area constructed in the step S2:
if the relay node does not exist, the target D2D terminal directly communicates with the base station, and the algorithm is ended;
if the relay node exists, continuing to carry out the subsequent steps;
s4, in the relay selection area constructed in the step S2, dividing a plurality of concentric circles by taking the midpoint of a line segment of a connecting line between the target D2D terminal and the base station as a circle center, so that the relay selection area constructed in the step S2 is divided into a plurality of sub-areas; the method specifically comprises the following steps:
A. setting a relay node closest to a circle center as an optimal relay node in a relay selection area;
B. and C, when the best relay node selected in the step A is used for relay transmission, calculating the best communication reliability gain epsilon by adopting the following formula best ：
Where Pr (N (a) =k) is Poisson probability that there are k relays in the region a, and the calculation formula of Pr (N (a) =k) is
λ r The average relay number of unit area in the area A is shown, and the I A I is the area of the area A; />
Indicating the reliability gain obtainable when selecting the best relay node for relay transmission when there are k relay nodes in the relay selection area, and +.>
R is the radius of the relay selection area, d s For D2D terminal coordinates (x s ,y s ) Coordinate with base station (x d ,y d ) The distance between them, μ is an intermediate variable, and +.>
Γ s For the SIR threshold required for D2D terminals, α is the loss index, η of the general power law path loss model th Interference threshold value lambda for receiving signal of non-D2D terminal s For the density of D2D terminals lambda p For the base station density d p Is the distance Γ between the non-D2D terminal and the corresponding communication base station p Selecting SIR threshold values of other non-D2D terminals in the area for the relay;
C. the communication reliability gain epsilon is calculated by the following formula region (L)：
Where Pr (N (a) =k) is Poisson probability that there are k relays in the region a, and the calculation formula of Pr (N (a) =k) is
λ r The average relay number of unit area in the area A is shown, and the I A I is the area of the area A; />
When k relay nodes exist in the relay selection area, the method of the invention is adopted to select the reliability gain which can be obtained when the relay nodes perform relay transmission, and
m is the number of relay nodes in the ring closest to the center of the circle and having the relay nodes; n represents that the selected relay node is the nth closest to the center of the circle in all the relay nodes when the relay nodes are selected for transmissionIs a relay node of (a); l is the index number of the divided concentric circles; />
For the combination number formula->
i represents the ith ring; ψ (x) is the reliability gain calculation function of the single nth best relay, and +.>
j represents a j-th relay node extending outwards from an n-th best relay node in the relay selection area, and gamma (A, B) is an incomplete gamma function;
D. setting an acquirable communication reliability gain epsilon region (L) gain ε of reliability of communication with optimum best Beta ratio between them and through the formula epsilon region (L)＝β·ε best Reversely pushing to obtain the index L of the divided concentric circles;
E. and D, dividing the relay selection area into 2 according to the index L of the divided concentric circles obtained in the step D L Concentric circles with equal areas of adjacent circular rings;
s5, selecting one subarea with the relay node from a plurality of subareas divided in the step S4;
s6, selecting one relay node to relay signals in the subarea selected in the step S5, so that communication relay selection of the power communication system is completed.
2. The communication relay selection method of the power communication system according to claim 1, wherein in the plurality of sub-areas divided in step S4 in step S5, one sub-area having a relay node is selected, and specifically comprising the steps of:
and selecting a subarea which is closest to the center of a circle and has a relay node from a plurality of subareas divided in the step S4.
3. The communication relay selection method of the power communication system according to claim 2, wherein in the sub-area selected in step S5, in step S6, a relay node is selected to relay signals, and the method specifically comprises the following steps:
in the sub-area selected in the step S5, if only one relay node exists, the relay node is directly selected for signal relay;
in the sub-area selected in step S5, if there are several relay nodes, randomly selecting one relay node from the several relay nodes to relay the signal.
4. A communication method including the communication relay selection method of the power communication system according to any one of claims 1 to 3, characterized by further comprising the steps of:
s7, carrying out data transmission of the power communication system according to the relay node selected in the step S6, thereby completing data communication of the power communication system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111204846.3A CN113923745B (en) | 2021-10-15 | 2021-10-15 | Communication relay selection method for power communication system and communication method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111204846.3A CN113923745B (en) | 2021-10-15 | 2021-10-15 | Communication relay selection method for power communication system and communication method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113923745A CN113923745A (en) | 2022-01-11 |
| CN113923745B true CN113923745B (en) | 2023-06-20 |
Family
ID=79240662
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111204846.3A Active CN113923745B (en) | 2021-10-15 | 2021-10-15 | Communication relay selection method for power communication system and communication method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113923745B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115474235B (en) * | 2022-10-31 | 2023-07-11 | 江苏芮捷智能科技有限公司 | LoRa wireless autonomous frequency division and multi-hop combined remote meter reading communication system and method |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111866901A (en) * | 2020-06-10 | 2020-10-30 | 西北大学 | Relay selection and resource information optimization method, system, computer equipment and application |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104105158B (en) * | 2014-07-08 | 2018-01-19 | 西安交通大学 | A kind of relay selection method based on D2D trunking traffics |
| WO2018105158A1 (en) * | 2016-12-08 | 2018-06-14 | 日本電気株式会社 | Device and method for relay selection |
| CN108966308A (en) * | 2018-08-23 | 2018-12-07 | 昆明理工大学 | A kind of D2D communication relay selection method based on outage probability |
-
2021
- 2021-10-15 CN CN202111204846.3A patent/CN113923745B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111866901A (en) * | 2020-06-10 | 2020-10-30 | 西北大学 | Relay selection and resource information optimization method, system, computer equipment and application |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113923745A (en) | 2022-01-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| El Helou et al. | A network-assisted approach for RAT selection in heterogeneous cellular networks | |
| CN109104464B (en) | Distributed data updating method for collaborative storage in edge computing environment | |
| CN101432989A (en) | System and method for clustering mobile devices in a wireless network | |
| CN109982437B (en) | D2D communication spectrum allocation method based on location-aware weighted graph | |
| CN106792764B (en) | Wireless base station planning method for power distribution terminal communication access network | |
| CN106792451B (en) | D2D communication resource optimization method based on multi-population genetic algorithm | |
| EP2158771A1 (en) | Method of discovering overlapping cells | |
| CN113923745B (en) | Communication relay selection method for power communication system and communication method thereof | |
| CN108600999A (en) | FD-D2D is based on channel distribution and power control combined optimization method | |
| CN102833755B (en) | Method and device for constructing CoMP (Coordinated Multi-Point) cell coordination set | |
| Nguyen et al. | A cooperative MIMO framework for wireless sensor networks | |
| CN114143248A (en) | Heterogeneous communication method, device, computer and readable medium based on dual-mode communication | |
| Zhang et al. | User-centric cell-free massive MIMO system for indoor industrial networks | |
| CN112637927B (en) | Multi-user multi-mode D2D communication resource allocation method based on energy efficiency | |
| CN116582910B (en) | Digital information transmission method and system | |
| CN111371572B (en) | Network node election method and node equipment | |
| CN103533597A (en) | Unstructured mobile peer-to-peer coverage network and construction and maintenance methods thereof | |
| CN113395724B (en) | Mode optimization method and device for base station | |
| CN102438245B (en) | Allying method for acknowledging radio communication alliance | |
| Araujo et al. | Paging and location update algorithms for cellular systems | |
| CN109041009A (en) | A kind of car networking uplink power distribution method and device | |
| CN107708174B (en) | Terminal direct D2D routing method in 5G system | |
| CN114423070A (en) | D2D-based heterogeneous wireless network power distribution method and system | |
| KR102264308B1 (en) | A next generation communication system for clustering and power control of radio remote head | |
| CN116867075B (en) | Channel allocation method in cellular and D2D user clustering network |
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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |