CN109618352B - A kind of non line of sight relay communications system based on LTE - Google Patents
A kind of non line of sight relay communications system based on LTE Download PDFInfo
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- CN109618352B CN109618352B CN201910032438.0A CN201910032438A CN109618352B CN 109618352 B CN109618352 B CN 109618352B CN 201910032438 A CN201910032438 A CN 201910032438A CN 109618352 B CN109618352 B CN 109618352B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
- H04W16/24—Cell structures
- H04W16/26—Cell enhancers or enhancement, e.g. for tunnels, building shadow
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L61/00—Network arrangements, protocols or services for addressing or naming
- H04L61/50—Address allocation
- H04L61/5007—Internet protocol [IP] addresses
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- 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
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W40/00—Communication routing or communication path finding
- H04W40/24—Connectivity information management, e.g. connectivity discovery or connectivity update
- H04W40/246—Connectivity information discovery
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- 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
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Abstract
The non line of sight relay communications system based on LTE that the invention discloses a kind of includes the first LTE system, the second LTE system and link terminal；First LTE system is communicated to connect with the first user equipment and link terminal respectively, and second LTE system is communicated to connect with second user equipment and link terminal respectively.The present invention is able to achieve the wireless link circuitry of non line of sight, and communication distance is farther out, it is possible to provide biggish transmission bandwidth, and it is at low cost, while the link terminal used is small in size, light-weight, low in energy consumption, adapts to the use of various environment.
Description
Technical field
The present invention relates to field of communication technology, in particular to a kind of non line of sight relay communications system based on LTE.
Background technique
The equipment such as current microwave and wireless bridge can only support horizon communication, can not establish in the reachable two places of non line of sight
Communication link, and communication distance is limited, and multi-hop is needed just to be able to achieve remote distance relay, cost is excessively high, and engineering construction difficulty is big, though
Correlation function may be implemented in right satellite communication, but expensive, and bandwidth is lower, is unable to satisfy the demand of low cost application.
Summary of the invention
In order to overcome defect present in background technique, the purpose of the present invention is to provide a kind of non line of sight based on LTE
Relay communications system, by increasing separately one relaying cell of a radio-frequency receiving-transmitting device build in two local LTE networks,
And one link terminal is set in the covering overlapping area of two relaying cells, link terminal is distinguished using two sides high-gain aerial
Two relaying cells are directed toward, realize the wireless access of two relaying cells, to get through the data between two local LTE networks
Communication link.
To achieve the goals above, a kind of the technical solution adopted by the present invention are as follows: non line of sight relayed communications system based on LTE
System includes the first LTE system, the second LTE system and link terminal；
First LTE system is connect with the first user equipment and link terminal respectively, second LTE system respectively with
Second user equipment and link terminal communication connection；
First LTE system is for sending destination address for the first user equipment in local coverage cell
The data packet of two user equipmenies is sent in link terminal by the first relaying cell, and for receiving by link terminal transmission
Destination address is the data packet of the first user equipment；
Second LTE system is for sending destination address for the second user equipment in local coverage cell
The data packet of one user equipment is sent in link terminal by the second relaying cell, and for receiving by link terminal transmission
Destination address is the data packet of second user equipment；
First relaying cell is the wireless signal area of coverage that the second radio frequency unit in first LTE system generates
Domain；
Second relaying cell is the wireless signal area of coverage that the second radio frequency unit in second LTE system generates
Domain.
In the above scheme, first LTE system and the second LTE system include the first radio frequency unit, the second radio frequency
Unit, Base Band Unit and EPC core net, first radio frequency unit are electrically connected with Base Band Unit with the second radio frequency unit, institute
Base Band Unit is stated to connect with EPC core network communications；
The first radio frequency unit in first LTE system is also communicated to connect with the first user equipment, the 2nd LTE system
The first radio frequency unit in system is also communicated to connect with second user equipment；
The second radio frequency unit in first LTE system also passes through the first relaying cell and link terminal communicates to connect,
The second radio frequency unit in second LTE system also passes through the second relaying cell and link terminal communicates to connect.
In the above scheme, the link terminal is made of link terminal A and link terminal B, and the link terminal A is in
After terminal B include power amplifier module, LTE module and routing module；
The power amplifier module and LTE module communicate to connect, and the LTE module and routing module communicate to connect；
Power amplifier module in the link terminal A is also communicated to connect with first antenna, the power amplifier mould in the link terminal B
Block is also connect with the second antenna communication；
The routing module in routing module and link terminal B in the link terminal A is communicated to connect by cable.
In the above scheme, the power amplifier module include antennal interface, radio frequency isolation switching circuit, transmitting amplifying circuit,
Receive amplifying circuit and radio-frequency receiving-transmitting interface circuit；
The antennal interface is electrically connected with radio frequency isolation switching circuit, and the radio frequency isolation switching circuit is amplified with transmitting
Circuit and reception amplifying circuit electrical connection, the transmitting amplifying circuit and reception amplifying circuit are electric with radio-frequency receiving-transmitting interface circuit
Connection, the radio-frequency receiving-transmitting interface circuit and LTE module communicate to connect；
Antennal interface in the link terminal A is also communicated to connect with first antenna, and the antenna in the link terminal B connects
Mouth is also connect with the second antenna communication.
In the above scheme, the LTE module includes radio frequency interface, radio frequency amplification transmission circuit, radio frequency chip and base band
Chip；
Described radio frequency interface one end and radio-frequency receiving-transmitting interface circuit communicate to connect, the other end and radio frequency amplification transmission circuit electricity
Connection, the radio frequency amplification transmission circuit are electrically connected with radio frequency chip, and the radio frequency chip is electrically connected with baseband chip, the base
Microarray strip and routing module communicate to connect.
In the above scheme, the routing module includes LTE module interface, CPU and network interface, and the LTE module connects
Mouth one end and baseband chip communicate to connect, and the other end is electrically connected with CPU, and the CPU is electrically connected with network interface；
The network interface of routing module and the network interface of routing module in link terminal B pass through in the link terminal A
Cable communication connection.
In the above scheme, the first antenna and the second antenna are gain directional antenna.
In the above scheme, the signal cover of first relaying cell and the second relaying cell is not less than
70km。
Compared with prior art, the beneficial effects of the present invention are: (1) is able to achieve the wireless link circuitry of non line of sight, communication
Farther out, and cost is relatively low for distance.
(2) LTE non line of sight relay communications system of the invention is used, theoretical coverage is up to 107km, transmission rate
Up to downlink 450Mbps, uplink 150Mbps, it is possible to provide compared with large transmission bandwidth.
(3) link terminal is small in size, light-weight, low in energy consumption, supports the use of various environment.
Detailed description of the invention
Fig. 1 is the schematic diagram of the non line of sight relay communications system provided by the invention based on LTE；
Fig. 2 is the composition block diagram of the first LTE system in Fig. 1；
Fig. 3 is the composition block diagram of link terminal in Fig. 1；
Fig. 4 is the composition block diagram of power amplifier module in Fig. 3；
Fig. 5 is the composition block diagram of LTE module in Fig. 3；
Fig. 6 is the composition block diagram of routing module in Fig. 3；
Fig. 7 is the connection schematic diagram one of the non line of sight relay communications system of LTE；
Fig. 8 is the connection schematic diagram two of the non line of sight relay communications system of LTE.
In figure: 1.1, the first LTE system；1.1a, the first radio frequency unit；1.1b, the second radio frequency unit；1.1c, base band list
Member；1.1d, EPC core net；1.2, the second LTE system；2.1, the first relaying cell；2.2, the second relaying cell；3, relaying is whole
End；3.1, link terminal A；3.11, power amplifier module；3.11a, antennal interface；3.11b, radio frequency isolation switching circuit；3.11c, hair
Penetrate amplifying circuit；3.11d, amplifying circuit is received；3.11e, radio-frequency receiving-transmitting interface circuit；3.12, LTE module；3.12a, radio frequency
Interface；3.12b, radio frequency amplify transmission circuit；3.12c, radio frequency chip；3.12d, baseband chip；3.13, routing module；
3.13a, LTE module interface；3.13b,CPU；3.13c, network interface；3.2, link terminal B；4.1, the first user equipment；
4.2, second user equipment；5.1, first antenna；5.2, the second antenna.
Specific embodiment
Below in conjunction with the drawings and specific embodiments, present invention is further described in detail.
It include the first LTE system as shown in Figure 1, being a kind of non line of sight relay communications system based on LTE provided by the invention
1.1, second LTE system 1.2 of uniting and link terminal 3, in which:
First LTE system 1.1 is communicated to connect with the first user equipment 4.1 and link terminal 3 respectively, the second LTE system 1.2
It is communicated to connect respectively with second user equipment 4.2 and link terminal 3；
First LTE system 1.1 is for sending destination address for the first user equipment 4.1 in local coverage cell
The data packet of second user equipment 4.2 is sent in link terminal 3 by the first relaying cell 2.1, and for receiving by relaying
The destination address that terminal 3 is sent is the data packet of the first user equipment 4.1；
Second LTE system 1.2 is for sending destination address for the second user equipment 4.2 in local coverage cell
The data packet of first user equipment 4.1 is sent in link terminal 3 by the second relaying cell 2.2, and for receiving by relaying
The destination address that terminal 3 is sent is the data packet of second user equipment 4.2；
Wherein, the first relaying cell 2.1 is the wireless signal that second radio frequency unit 1.1b is generated in the first LTE system 1.1
Overlay area；
Wherein, the second relaying cell 2.2 is the wireless signal that second radio frequency unit 1.1b is generated in the second LTE system 1.2
Overlay area.
Such as Fig. 1 and as shown in Fig. 2, the first LTE system 1.1 and the second LTE system 1.2 include the first radio frequency unit
1.1a, the second radio frequency unit 1.1b, Base Band Unit 1.1c and EPC core net 1.1d, the first radio frequency unit 1.1a and the second radio frequency
Unit 1.1b is electrically connected with Base Band Unit 1.1c, and Base Band Unit 1.1c and EPC core net 1.1d are communicated to connect；
The first radio frequency unit 1.1a in first LTE system 1.1 is also communicated to connect with the first user equipment 4.1, the 2nd LTE
The first radio frequency unit 1.1a in system 1.2 is also communicated to connect with second user equipment 4.2；
It is logical with link terminal 3 that the second radio frequency unit 1.1b in first LTE system 1.1 also passes through the first relaying cell 2.1
Letter connects, and the second radio frequency unit 1.1b in the second LTE system 1.2 also passes through the second relaying cell 2.2 and communicates with link terminal 3
Connection.
As shown in Figure 3 and Figure 7, link terminal 3 is made of link terminal A 3.1 and link terminal B 3.2, link terminal A
3.1 and link terminal B 3.2 includes power amplifier module 3.11, LTE module 3.12 and routing module 3.13；
Power amplifier module 3.11 and LTE module 3.12 communicate to connect, and LTE module 3.12 and routing module 3.13 communicate to connect；
Power amplifier module 3.11 in link terminal A 3.1 is also communicated to connect with first antenna 5.1, in link terminal B 3.2
Power amplifier module 3.11 also with the second antenna 5.2 communicate to connect；
The routing module 3.13 in routing module 3.13 and link terminal B 3.2 in link terminal A 3.1 passes through cable
Communication connection.
As shown in Figure 4 and Figure 8, power amplifier module 3.11 includes antennal interface 3.11a, radio frequency isolation switching circuit 3.11b, hair
It penetrates amplifying circuit 3.11c, receive amplifying circuit 3.11d and radio-frequency receiving-transmitting interface circuit 3.11e；
Antennal interface 3.11a is electrically connected with radio frequency isolation switching circuit 3.11b, radio frequency isolation switching circuit 3.11b with
Emit amplifying circuit 3.11c and receives amplifying circuit 3.11d electrical connection, emit amplifying circuit 3.11c and receive amplifying circuit
3.11d is electrically connected with radio-frequency receiving-transmitting interface circuit 3.11e, radio-frequency receiving-transmitting interface circuit 3.11e and 3.12 communication link of LTE module
It connects；
Antennal interface 3.11a in link terminal A 3.1 is also communicated to connect with first antenna 5.1, in link terminal B 3.2
Antennal interface 3.11a also with the second antenna 5.2 communicate to connect.
As shown in Figure 5 and Figure 8, LTE module 3.12 includes radio frequency interface 3.12a, radio frequency amplification transmission circuit 3.12b, penetrates
Frequency chip 3.12c and baseband chip 3.12d；
The one end radio frequency interface 3.12a and radio-frequency receiving-transmitting interface circuit 3.11e are communicated to connect, and the other end and radio frequency amplification are received and dispatched
Circuit 3.12b electrical connection, radio frequency amplification transmission circuit 3.12b are electrically connected with radio frequency chip 3.12c, radio frequency chip 3.12c and base
Microarray strip 3.12d electrical connection, baseband chip 3.12d and routing module 3.13 communicate to connect.
As shown in Figure 6 and Figure 8, routing module 3.13 includes LTE module interface 3.13a, CPU 3.13b and network interface
3.13c, LTE module one end interface 3.13a and baseband chip 3.12d are communicated to connect, and the other end is electrically connected with CPU 3.13b, CPU
3.13b is electrically connected with network interface 3.13c；
Routing module in the network interface 3.13c and link terminal B 3.2 of routing module 3.13 in link terminal A 3.1
3.13 network interface 3.13c is communicated to connect by cable.
Wherein, first antenna 5.1 and the second antenna 5.2 are gain directional antenna.
Wherein, the signal cover of the first relaying cell 2.1 and the second relaying cell 2.2 is not less than 70km.
The present invention is based on the communication process of the non line of sight relay communications system of LTE is as follows: when the first LTE system of two places
1.1 and second LTE system 1.2 power on after, the first user 4.1 below the first LTE system 1.1 passes through local coverage cell access
First LTE system 1.1, and it is assigned an IP address (such as 20.41.1.2), link terminal A 3.1 orients the by high-gain
One antenna 5.1 is directed toward the direction of the first relaying cell 2.1, and searches the signal of the first relaying cell 2.1 at a distance, passes through nothing
Line accesses the first LTE system 1.1 where the first relaying cell 2.1, and is assigned an IP address (such as 30.41.1.3)；
Second user 4.2 below second LTE system 1.2 passes through local coverage cell and accesses the second LTE system 1.2, and
It is assigned an IP address (such as 30.41.2.2), link terminal B 3.2 orients the second antenna 5.2 by high-gain and is directed toward second
The direction of relaying cell 2.2, and the signal of the second relaying cell 2.2 is searched at a distance, it is relayed by wireless access second small
The second LTE system 1.2 where area 2.2, and it is assigned an IP address (such as 30.41.2.3)；
Routing module 3.13 in link terminal A 3.1 is configured with fixed IP address (such as 192.168.1.100), relaying
Routing module 3.13 in terminal B 3.2 is also configured with fixed IP address (such as 192.168.1.200), while link terminal A
Routing module 3.13 in 3.1 is connect with the routing module 3.13 in link terminal B 3.2 by cable.
When first user 4.1 needs to carry out service communication with second user 4.2, the first user 4.1 issues an IP data
Packet, destination address be second user 4.2 IP address (such as 30.41.2.2), source address be the first user 4.1 IP address (such as
30.41.1.2), solved in Base Band Unit 1.1c of the IP data packet by LTE air protocol the first LTE system 1.1 of arrival
It adjusts, the IP data packet being demodulated out is then sent to the EPC core net 1.1d in the first LTE system 1.1, and by EPC core
Net 1.1d solves the IP data packet, while judging the whereabouts of the IP data packet, and the IP data packet being solved is small by the first relaying
Area 2.1 is sent to link terminal A 3.1, and the LTE module 3.12 in link terminal A 3.1 receives the IP data sended over
Packet, the routing forwarding rule then configured according to LTE module 3.12 in link terminal A 3.1, is transmitted to relaying for IP data packet
Routing module 3.13 in terminal A 3.1, the routing module 3.13 in link terminal A 3.1 are advised according to the routing of inside configuration
Then, IP data packet is sent to by the routing module 3.13 in link terminal B 3.2 by cable, the road in link terminal B 3.2
After receiving IP data packet by module 3.13, according to the routing rule of inside configuration, link terminal B is sent by IP data packet
LTE module 3.12 in 3.2, according to the routing rule configured inside LTE module 3.12 in link terminal B 3.2, and passes through LTE
Air protocol sends IP data packet in the Base Band Unit 1.1c of the second LTE system 1.2 and demodulates, and then will demodulate
IP data packet is sent to the EPC core net 1.1d of the second LTE system 1.2, and solves IP data packet by EPC core net 1.1d, together
When judge the whereabouts of the IP data packet, sent further according to the data configured inside EPC core net 1.1d in the second LTE system 1.2
Rule, by the local coverage cell under the second LTE system 1.2, the IP data packet solved is sent in coverage cell
Two users 4.2, so that the data message for realizing the first user 4.1 to second user 4.2 transmits, similarly second user 4.2
Message can be sent to the first user 4.1, to realize mutual between terminal under two non line of sight overlength distance covering systems
Communication.
The above is only embodiments of the present invention, are not intended to limit the scope of the present invention, all to be said using of the invention
Equivalent process transformation made by bright book content is directly or indirectly applied in other correlative technology fields, this is similarly included in
In the scope of patent protection of invention.
Claims (8)
1. a kind of non line of sight relay communications system based on LTE, which is characterized in that include the first LTE system (1.1), the 2nd LTE
System (1.2) and link terminal (3)；
First LTE system (1.1) and the first user equipment (4.1) and link terminal (3) communicate to connect, the 2nd LTE
System (1.2) is communicated to connect with second user equipment (4.2) and link terminal (3) respectively；
First LTE system (1.1), for sending destination for the first user equipment (4.1) in local coverage cell
Location is that the data packet of second user equipment (4.2) is sent in link terminal (3) by the first relaying cell (2.1), and is used for
Receive by the destination address that link terminal (3) are sent be the first user equipment (4.1) data packet；
Second LTE system (1.2), for sending destination for the second user equipment (4.2) in local coverage cell
Location is that the data packet of the first user equipment (4.1) is sent in link terminal (3) by the second relaying cell (2.2), and is used for
Receive by the destination address that link terminal (3) are sent be second user equipment (4.2) data packet；
First relaying cell (2.1) is the nothing that the second radio frequency unit (1.1b) in first LTE system (1.1) generates
Line signal coverage areas；
Second relaying cell (2.2) is the nothing that the second radio frequency unit (1.1b) in second LTE system (1.2) generates
Line signal coverage areas.
2. the non line of sight relay communications system according to claim 1 based on LTE, which is characterized in that the first LTE system
(1.1) and the second LTE system (1.2) are united comprising the first radio frequency unit (1.1a), the second radio frequency unit (1.1b), Base Band Unit
(1.1c) and EPC core net (1.1d), first radio frequency unit (1.1a) and the second radio frequency unit (1.1b) with base band list
First (1.1c) electrical connection, the Base Band Unit (1.1c) and EPC core net (1.1d) are communicated to connect；
The first radio frequency unit (1.1a) in first LTE system (1.1) is also communicated to connect with the first user equipment (4.1),
The first radio frequency unit (1.1a) in second LTE system (1.2) is also communicated to connect with second user equipment (4.2)；
The second radio frequency unit (1.1b) in first LTE system (1.1) is also whole by the first relaying cell (2.1) and relaying
(3) communication connection is held, the second radio frequency unit (1.1b) in second LTE system (1.2) also passes through the second relaying cell
(2.2) it is communicated to connect with link terminal (3).
3. the non line of sight relay communications system according to claim 2 based on LTE, which is characterized in that the link terminal
(3) it is made of link terminal A (3.1) and link terminal B (3.2), the link terminal A (3.1) and link terminal B (3.2) are equal
Include power amplifier module (3.11), LTE module (3.12) and routing module (3.13)；
The power amplifier module (3.11) and LTE module (3.12) communicate to connect, the LTE module (3.12) and routing module
(3.13) it communicates to connect；
Power amplifier module (3.11) in the link terminal A (3.1) is also communicated to connect with first antenna (5.1), and the relaying is eventually
The power amplifier module (3.11) in B (3.2) is held also to communicate to connect with the second antenna (5.2)；
The routing module (3.13) in routing module (3.13) and link terminal B (3.2) in the link terminal A (3.1) is logical
Cross cable communication connection.
4. the non line of sight relay communications system according to claim 3 based on LTE, which is characterized in that the power amplifier module
(3.11) it is put comprising antennal interface (3.11a), radio frequency isolation switching circuit (3.11b), transmitting amplifying circuit (3.11c), reception
Big circuit (3.11d) and radio-frequency receiving-transmitting interface circuit (3.11e)；
The antennal interface (3.11a) is electrically connected with radio frequency isolation switching circuit (3.11b), the radio frequency isolation switching circuit
(3.11b) is electrically connected with transmitting amplifying circuit (3.11c) and reception amplifying circuit (3.11d), the transmitting amplifying circuit
(3.11c) and reception amplifying circuit (3.11d) are electrically connected with radio-frequency receiving-transmitting interface circuit (3.11e), and the radio-frequency receiving-transmitting connects
Mouth circuit (3.11e) and LTE module (3.12) communicates to connect；
Antennal interface (3.11a) in the link terminal A (3.1) is also communicated to connect with first antenna (5.1), and the relaying is eventually
The antennal interface (3.11a) in B (3.2) is held also to communicate to connect with the second antenna (5.2).
5. the non line of sight relay communications system according to claim 4 based on LTE, which is characterized in that the LTE module
(3.12) comprising radio frequency interface (3.12a), radio frequency amplification transmission circuit (3.12b), radio frequency chip (3.12c) and baseband chip
(3.12d)；
Described radio frequency interface one end (3.12a) and radio-frequency receiving-transmitting interface circuit (3.11e) are communicated to connect, and the other end and radio frequency amplify
Transmission circuit (3.12b) electrical connection, radio frequency amplification transmission circuit (3.12b) is electrically connected with radio frequency chip (3.12c), described
Radio frequency chip (3.12c) is electrically connected with baseband chip (3.12d), and the baseband chip (3.12d) and routing module (3.13) are logical
Letter connection.
6. the non line of sight relay communications system according to claim 5 based on LTE, which is characterized in that the routing module
(3.13) comprising LTE module interface (3.13a), CPU (3.13b) and network interface (3.13c), the LTE module interface
The one end (3.13a) and baseband chip (3.12d) are communicated to connect, and the other end is electrically connected with CPU (3.13b), the CPU (3.13b)
It is electrically connected with network interface (3.13c)；
It is routed in the network interface (3.13c) of routing module (3.13) and link terminal B (3.2) in the link terminal A (3.1)
The network interface (3.13c) of module (3.13) is communicated to connect by cable.
7. the non line of sight relay communications system according to claim 3 based on LTE, which is characterized in that the first antenna
(5.1) and the second antenna (5.2) is gain directional antenna.
8. the non line of sight relay communications system according to claim 1 based on LTE, which is characterized in that first relaying
Cell (2.1) and the signal cover of the second relaying cell (2.2) are not less than 70km.
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| US20050157675A1 (en) * | 2004-01-16 | 2005-07-21 | Feder Peretz M. | Method and apparatus for cellular communication over data networks |
| US20060141929A1 (en) * | 2004-12-28 | 2006-06-29 | Lockie Douglas G | Cellular communication system |
| KR100819405B1 (en) * | 2006-01-03 | 2008-04-03 | 삼성전자주식회사 | Apparatus and method for relay station with adaptive modulation and coding in mobile communication system |
| CN102017714B (en) * | 2008-01-22 | 2013-12-04 | 黑莓有限公司 | Path selection for a wireless system with relays |
| CN101500246B (en) * | 2008-01-31 | 2010-12-29 | 大唐移动通信设备有限公司 | Data transceiving method and apparatus based on communication system provided with relay station |
| CN101873609B (en) * | 2009-04-27 | 2013-03-20 | 电信科学技术研究院 | Data transmission method and device for relay system |
| CN101997593B (en) * | 2009-08-17 | 2014-04-02 | 上海交通大学 | Self-adaption relay type preferential selecting method and relay node |
| US9480106B2 (en) * | 2012-11-28 | 2016-10-25 | T-Mobile Usa, Inc. | Inter-base station logical interface communication using relay devices |
| CN105578123A (en) * | 2014-10-16 | 2016-05-11 | 航天恒星科技有限公司 | Beyond-the-horizon video transmission system based on Ad Hoc network and method thereof |
| CN108011641B (en) * | 2017-12-07 | 2019-12-24 | 中国电子科技集团公司第五十四研究所 | Aerial forwarding device of LTE base station |
| CN109104222A (en) * | 2018-07-27 | 2018-12-28 | 湖南时变通讯科技有限公司 | It is a kind of based on millimeter wave-microwave multiple-input and multiple-output cordless communication network |
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2019
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