WO1993020664A1 - Procede et appareil pour un repeteur telealimente radioelectrique dans un systeme de radiocommunications cellulaire numerique - Google Patents

Procede et appareil pour un repeteur telealimente radioelectrique dans un systeme de radiocommunications cellulaire numerique Download PDF

Info

Publication number
WO1993020664A1
WO1993020664A1 PCT/US1993/002535 US9302535W WO9320664A1 WO 1993020664 A1 WO1993020664 A1 WO 1993020664A1 US 9302535 W US9302535 W US 9302535W WO 9320664 A1 WO9320664 A1 WO 9320664A1
Authority
WO
WIPO (PCT)
Prior art keywords
radio channel
signal
site
radio
channel
Prior art date
Application number
PCT/US1993/002535
Other languages
English (en)
Inventor
John Csapo
Brian Cheng-Jean Chen
Kenneth B. Hallman
Original Assignee
Motorola Inc.
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Motorola Inc. filed Critical Motorola Inc.
Priority to JP5517496A priority Critical patent/JPH07505512A/ja
Priority to CA002133111A priority patent/CA2133111C/fr
Priority to KR1019940703396A priority patent/KR0159320B1/ko
Publication of WO1993020664A1 publication Critical patent/WO1993020664A1/fr

Links

Classifications

    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/24—Radio transmission systems, i.e. using radiation field for communication between two or more posts
    • H04B7/26—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile
    • H04B7/2603—Arrangements for wireless physical layer control
    • H04B7/2606—Arrangements for base station coverage control, e.g. by using relays in tunnels

Definitions

  • the present invention relates to cellular radio communication systems and, more particularly, to a method and apparatus for using radio remote repeater mechanisms in a digital cellular radio communication system.
  • Cellular radio communication systems typically include a number of central communication base sites. Each central communication site has a service area coverage for servicing mobile communication units within the service area. The service areas typically are arranged such that adjacent remote base site service coverage areas overlap in a manner that provides a substantially continuous service region. The substantially continuous service region provides uninterrupted service by handing off mobile communication units from one base site serving a service area to an adjacent base site serving another service area. Communication between the central communication sites and mobile communication units typically occurs on a pair of frequency channels (i.e., transmit and receive frequencies) assigned according to a cellular communication system channel reuse plan. Upon activation, a mobile communication unit searches a radio frequency spectrum for control signal transmissions from a local central communication site.
  • frequency channels i.e., transmit and receive frequencies
  • the control signal transmissions from the local communication site are found in a radio frequency broadcast control channel (BCCH).
  • BCCH contains specific information needed by the mobile communication unit in order to format and code radio communication system access requests to the local central communication site.
  • GSM Group Special Mobile
  • Pan-European cellular communication system as specified in GSM recommendations by Motorola available from the European Telecommunication Standards Institute (ETSI) and incorporated herein by reference, is an example of a system using such a format including the BCCH.
  • GSM Group Special Mobile
  • GSM Pan-European cellular communication system, as specified in GSM recommendations by Motorola available from the European Telecommunication Standards Institute (ETSI) and incorporated herein by reference, is an example of a system using such a format including the BCCH.
  • ETSI European Telecommunication Standards Institute
  • the formatting information may further identify the communication system as a time division multiple access (TDMA) system and may identify a time slot in which to transmit an access request.
  • TDMA time division multiple access
  • the mobile communication unit upon detecting and decoding information received on a BCCH subsequently transmits an access request to a local central communication site.
  • the local central communication site upon receiving the access request from the mobile communication unit subsequently responds by transmitting a signal directed to the mobile communication unit which identifies a resource which it can use for communication with the local central communication site.
  • service areas of central communication sites can be divided into sectors, wherein each sector a percentage of the available communication resources, (i.e., communication channels).
  • the required geographic separation may be reduced while maintaining an adequate signal to noise ratio.
  • U.S. Patent Number 4,128,740, assigned to Motorola, Inc. discloses a four cell (service area) - six sector communication resource reuse pattern. As disclosed, each cell is divided into six sectors and each sector contains approximately 1/24th of the available communication resources. For every four cell sites, the communication resource pattern is repeated. This communication resource reuse pattern may be further reduced to a 1 cell site reuse pattern as disclosed in pending U.S.
  • Patent application 07/459,624 which was filed January 2, 1990, and also assigned to Motorola, Inc. It will be appreciated by those skilled in the art many other reuse patterns exist for use in cellular communication systems including but not limited to 3, 7, 21 , 49, 63, 91 site reuse patterns.
  • the local central communication site After allocating a communication resource for use by the mobile communication unit, the local central communication site typically allocates a transceiver typically located at the local central communication site to service any subsequent communication with the mobile communication unit on the assigned communication channel resource.
  • the transceiver of the central communication site will subsequently route the communications of the mobile communication unit to a target communication unit.
  • the target communication unit maybe either another mobile communication unit within the same service area, a mobile communication unit in another service area, or a subscriber on the public switched telephone network (PSTN).
  • PSTN public switched telephone network
  • High density cellular communication systems with sufficient spectrum can serve a large number of users in an urban environment by using microcells which service a small geographic area.
  • higher signal propagation losses and high infrastructure costs severely limit the economic viability of such communication systems.
  • Since providing service coverage to rural, suburban and urban environments alike is crucial in establishing a complete cellular service, the need for a less costly means of deploying a cellular communication system is large.
  • Another consideration is that due to increasing competition for frequency spectrum, the service coverage areas of central communication sites may have to be reduced to allow for frequency reuse in a relatively close proximity. Reducing the service coverage area of a central communication site, on the other hand, increases the number of central communication sites necessary to cover a given geographic area. Therefore, it is desirable to minimize the cost of the individual central communication sites equipment so that the overall cost of the cellular communication system can be reduced.
  • the present invention overcomes the above-mentioned communication system cost problems by effectively trading radio frequency spectrum, which is typically abundant in low communication traffic density areas, for a less expensive way to serve a larger geographic area.
  • the present invention can be used in microceliular applications as a substitute for wireline connections between cell site controllers provided sufficient radio spectrum is available.
  • the present invention provides a digital cellular radio communication system having a remote repeater and a central communication site.
  • the central communication site transmits and receives signals in a first radio channel assigned according to a cellular communication system channel reuse plan, transmits signals to and receives signals from a cellular communication network unit, and digitally processes received signals for subsequent transmission in the first radio channel or to the cellular communication network unit.
  • the remote repeater (i.e., remote communication site), which is substantially remotely located from the central communication site, receives a signal in either the first radio channel or a second radio channel assigned according to the cellular communication system channel reuse plan, channel shifts the received signal between the first and the second radio channels, and transmits the shifted signal in the other of the first and the second radio channels.
  • the hardware and software needs of the remote communication sites are less than the central communication sites because the remote communication site does not need to have a mechanism for communicating with the cellular communication network unit or a mechanism for digitally processing received signals. Therefore, the monetary cost of a the remote communication sites is reduced and as such the overall cost of the communication system can be reduced by using these less expensive remote communication sites in conjunction with central communication sites in low communication traffic density areas.
  • FIGs. 1-1, 1-2 are diagrams showing preferred embodiment digital cellular radio communication systems.
  • FIGs. 2-1, 2-2 are diagrams showing preferred embodiment central communication sites.
  • FIGs. 3-1 , 3-2 are diagrams showing preferred embodiment remote communication sites.
  • FIGs. 4-1 , 4-2 show flowcharts of how a signal travels from a cellular communication network unit to a mobile communication unit in each preferred embodiment digital cellular radio communication system.
  • FIGs. 5-1 , 5-2 show flowcharts of how a signal travels from a mobile communication unit to a cellular communication network unit in each preferred embodiment digital cellular radio communication system.
  • the communication system 100 includes at least one central communication site 104.
  • the central communication site 104 contains an antenna tower 106 and a site equipment storage unit 108.
  • the site equipment storage unit 108 preferably includes a transceiver mechanism 1 0, communication unit 114, and a processor apparatus 112.
  • the transceiver mechanism 110 is operably connected to the antenna tower 106 to which an antenna 116 is preferably mounted so that the transceiver 110 can transmit and receive signals in a first radio channel through antenna 116.
  • Antenna 116 may be an omni ⁇ directional antenna, sectorized antenna array, or a narrow beam antenna. It will be appreciated by those skilled in the art that the best type of antennae varies depending on the particular installation environments. In the preferred embodiment antenna 116 is an omni ⁇ directional antenna.
  • a radio channel refers to a pair of channel bands used for a communication link by two communication devices. For the following discussion this pair of channel bands will be designated from the perspective of the central communication site 104.
  • the portion of the first radio channel used for transmitting messages to the central communication site 104 will be designated as the inbound portion of the first channel.
  • the portion of the first radio channel used for transmitting messages from the central communication site 104 will be designated as the outbound portion of the first channel, it will be appreciated by those skilled in the art that the first radio channel may be any one of several types of radio channels including, but not limited to, code division channels (e.g., direct sequence and frequency hopping spread spectrum channels), time division channels (e.g., GSM-based channels), and frequency division channels. For simplicity, the remainder of the detailed description will be described using frequency divided channels.
  • the preferred embodiment transceiver mechanism 110 preferably is capable of transmitting a signal in the outbound portion of the first radio channel and is capable of receiving a signal in the inbound portion of the first radio channel.
  • the communication unit 114 preferably is operably connected to a cellular communication network unit 120 such that the unit 120 can transmit signals to and receive signals from the network unit 120.
  • the communication network unit 114 may be a base communication site controller, another central communication site or a communication system switch (e.g., PSTN switch).
  • Processor apparatus 112 is operatively coupled to the transceiver mechanism 110 and the communication unit 114 such that the processor 112 can digitally process a signal received by either the transceiver 110 or the communication unit 114 and subsequently provide the processed signal to the device which did not send the signal to the processor 112 (i.e., either the transceiver 110 or the communication unit 114).
  • the communication system 100 also includes at least one remote communication site 102 which is substantially remotely located from the central communication site 104.
  • the remote communication site 102 contains an antenna tower 122 and a site equipment storage unit 124.
  • the site equipment storage unit 124 preferably includes a first transceiver mechanism 126, a channel shifting device 128, and a second transceiver mechanism 130.
  • the first transceiver mechanism 126 is operably connected to the antenna tower 122 to which an antenna 132 is preferably mounted so that the transceiver 126 can transmit and receive signals in the first radio channel through antenna 132.
  • Antenna 132 like antenna 116, may be an omni-directional antenna, sectorized antenna array, or a narrow beam antenna.
  • antenna 132 is a narrow beam antenna configured such that a signal transmitted from antenna 132 will appear to the central communication site 104 to be from a mobile communication unit 136 within cell 1 and configured such that a signal transmitted by antenna 116 can be received at remote communication site 102.
  • the use of the narrow beam (i.e., directional antenna) on an antenna tower 122 will typically result in a high quality radio link (possible even line of sight) between the central 104 and the remote 102 communication sites.
  • the preferred embodiment first transceiver mechanism 126 preferably is capable of transmitting a signal in the inbound portion of the first radio channel and is capable of receiving a signal in the outbound portion of the first radio channel.
  • the second transceiver mechanism 130 is operably connected to the antenna tower 122 to which an antenna 134 is preferably mounted so that the transceiver 130 can transmit and receive signals in a second radio channel through antenna 134.
  • Antenna 134 like antenna 116, may be an omni-directional antenna, sectorized antenna array, or a narrow beam antenna.
  • antenna 134 is an omni-directional antenna configured such that a signal transmitted from antenna 134 can be received by a mobile communication unit 138 within cell 2 and configured such that a signal transmitted by mobile communication unit 138 can be received at remote communication site 102.
  • the second radio channel like the first radio channel, has a pair of channel bands designated from the perspective of the remote communication site 102. More precisely, the portion of the second radio channel used for transmitting messages to the remote communication site 102 will be designated as the inbound portion of the second channel. Similarly, the portion of the second radio channel used for transmitting messages from the remote communication site 102 will be designated as the outbound portion of the second channel.
  • the preferred embodiment second transceiver mechanism 130 preferably is capable of transmitting a signal in the outbound portion of the second radio channel and is capable of receiving a signal in the inbound portion of the second radio channel.
  • transceivers 126 and 130 could be incorporated into a single transceiver mechanism.
  • function performed by antenna 132 and 134 could be provided by a single antenna.
  • the channel shifting device 128 shifts the received signal between the first and the second radio channels.
  • the channel shifting device 128 shifts a received signal in the inbound portion of the second radio channel to the inbound portion of the first radio channel.
  • the channel shifting device 128 shifts a received signal in the outbound portion of the first radio channel to the outbound portion of the second radio channel.
  • the channel shifting device 128 may also include an automatic gain control circuitry for adjusting the gain of the received signal to a predetermined power level. This gain control circuitry would insure that a signal transmitted by the first and or the second transceiver mechanism 126, 130 would have adequate signal power. Thus, when mobile communication unit 138 is near the remote communication site 104, the transmitted signal power could be attenuated.
  • the communication system 100 also includes mobile communication unit 136 or 138 which is substantially remotely located from the central communication site 104 and substantially remotely located from the remote communication site 102.
  • the mobile communication unit 136,138 contains transceiver mechanism.
  • the transceiver mechanism preferably is operably configured transmit and receive signals in the first and the second radio channels.
  • the preferred embodiment mobile unit transceiver mechanism preferably is capable of receiving a signal in the outbound portion of either the first or the second radio channels, determining in which radio channels the signal was received, and transmitting a signal in the inbound portion of the determined radio channel.
  • the mobile transceiver can directly communicate with the first transceiver 110 of the central communication site 104 and the second 130 transceiver of the remote communication site 102.
  • the spedfic first and second radio channels preferably are assigned according to a cellular communication system channel reuse plan based upon a channel reuse pattern (e.g., 3-site, 4-site, 7-site, 21 -site, 49-site, 63-site or 91 -site channel reuse patterns).
  • a channel reuse pattern e.g., 3-site, 4-site, 7-site, 21 -site, 49-site, 63-site or 91 -site channel reuse patterns.
  • the radio channel assigned to the first radio channel may be substantially similar to the radio channel assigned to the second radio channel.
  • the radio channel assigned to the first radio channel may be substantially different from the radio channel assigned to the second radio channel.
  • Each central communication site 104 can be configured to extend communication traffic control to remote communication sites in each of the surrounding cells (i.e., cell 2-cell 7).
  • the radio channel assigned to the first radio channel may be substantially similar to or different from the radio channel assigned to the second radio channel (assodated with the remote communication site 102) and may be substantially similar to or different from the radio channel assigned to the other second radio channels (assodated with the other remote communication sites found in cells 3, 4, 5, 6, and 7 which are also served by the central communication site 104).
  • each served remote site may operate with respect to a second radio channel which is assigned according to the cellular communication system channel reuse plan and is substantially different from the first radio channel and is substantially different from the second radio channel assigned to each other remote communication site.
  • each served remote site may operate with respect to a second radio channel which is assigned according to the cellular communication system channel reuse plan and is substantially different from the first radio channel and is substantially similar to the second radio channel assigned to each other remote communication site.
  • each remote site may operate with respect to a second radio channel which is assigned according to the cellular communication system channel reuse plan and is substantially similar to the first radio channel and is substantially similar to the second radio channel assigned to each other remote communication site.
  • each remote site may operate with respect to a second radio channel which is assigned according to the cellular communication system channel reuse plan and is substantially similar to the first radio channel and is substantially different from the second radio channel assigned to each other remote communication site.
  • FIG. 4-1 shows flowchart describing how a signal preferably travels from the cellular communication network unit 120 to mobile communication unit 138.
  • the process begins 200 at a cellular communication network unit 120 when a signal is sent to a central communication site 104.
  • the central communication site 104 receives 202 the signal from the cellular communication network unit 120.
  • the central communication site 102 digitally processes 204 the received signal.
  • a first radio channel is assigned 206 according to a cellular communication system channel reuse plan to the central communication site 104. This first radio channel has inbound and outbound radio channel portions.
  • the central communication site 104 transmits 208 the processed signal in the outbound portion of the first radio channel.
  • a remote communication site 102 which is substantially remotely located from the central communication site 104, receives 210 the transmitted signal in the outbound portion of the first radio channel.
  • a second radio channel is assigned 212 according to the cellular communication system channel reuse plan to the remote communication site 102. This second radio channel also has inbound and outbound radio channel portions.
  • the received signal is channel shifted 214 from the first radio channel to the second radio channel at the remote communication site 102. The gain of the shifted signal is adjusted 215 to a predetermined power level.
  • the remote communication site 102 transmits 216 the shifted signal in the outbound portion of the second radio channel.
  • the shifted signal is received 218 in the outbound portion of the second radio channel at a mobile communication unit 138 which ends 220 the process.
  • FIG. 5-1 shows flowchart describing how a signal preferably travels from mobile communication unit 138 to the cellular communication network unit 120.
  • the process begins 230 at a mobile communication unit 138.
  • a first radio channel is assigned 232 according to a cellular communication system channel reuse plan to a central communication site 104.
  • the first radio channel has inbound and outbound radio channel portions.
  • a second radio channel is assigned 234 according to the cellular communication system channel reuse plan to a remote communication site 102 which is substantially remotely located from the central communication site 104.
  • the second radio channel has inbound and outbound radio channel portions.
  • the mobile communication unit 138 transmits 236 a signal in the inbound portion of the second radio channel.
  • the remote communication site 102 receives 238 the signal in the inbound portion of the second radio channel. Subsequently, the received signal is channel shifted 240 from the second radio channel to the first radio channel at the remote communication site 102. The gain of the shifted signal is adjusted 242 to a predetermined power level. Then, the remote communication site 102 transmits 244 the shifted signal in the inbound portion of the first radio channel. The central communication site 104 receives 246 the transmitted signal in the inbound portion of the first radio channel. The received signal is digitally processed 248 at the central communication site 104. Finally, the processed signal is transmitted 250 from the central communication site 104 to a cellular communication network unit 120 which ends 252 the process.
  • the communication system 100 includes at least one central communication site 104.
  • the central communication site 104 contains an antenna tower 106 and a site equipment storage unit 108.
  • the site equipment storage unit 108 preferably includes a transceiver mechanism 110, transceiver mechanism 111, communication unit 114, and a processor apparatus 112.
  • the transceiver mechanism 110 is operably connected to the antenna tower 106 to which an antenna 118 is preferably mounted so that the transceiver 110 can transmit and receive signals in a first radio channel through antenna 118.
  • Antenna 118 may be an omni ⁇ directional antenna, sectorized antenna array, or a narrow beam antenna. It will be appreciated by those skilled in the art that the best type of antennae varies depending on the particular installation environments. In the preferred embodiment antenna 118 is an omni ⁇ directional antenna.
  • a radio channel refers to a pair of channel bands used for a communication link by two communication devices. For the following discussion this pair of channel bands will be designated from the perspective of the central communication site 104.
  • the portion of the first radio channel used for transmitting messages to the central communication site 104 will be designated as the inbound portion of the first channel.
  • the portion of the first radio channel used for transmitting messages from the central communication site 104 will be designated as the outbound portion of the first channel.
  • the first radio channel may be any one of several types of radio channels including, but not limited to, code division channels (e.g., direct sequence and frequency hopping spread spectrum channels), time division channels (e.g., GSM-based channels), and frequency division channels.
  • code division channels e.g., direct sequence and frequency hopping spread spectrum channels
  • time division channels e.g., GSM-based channels
  • frequency division channels e.g., GSM-based channels
  • the preferred embodiment transceiver mechanism 110 preferably is capable of transmitting a signal in the outbound portion of the first radio channel and is capable of receiving a signal in the inbound portion of the first radio channel.
  • the transceiver mechanism 111 (hereinafter cross-transceiver 111) is operably connected to the antenna tower 106 to which an antenna 116 is preferably mounted so that the cross-transceiver 111 can transmit and receive signals in a second radio channel through antenna 116.
  • Antenna 116 may be an omni-directional antenna, sectorized antenna array, or a narrow beam antenna. In the preferred embodiment antenna 116 is an omni-directional antenna.
  • the portion of the second radio channel used for transmitting messages to the central communication site 104 will be designated as the inbound portion of the second channel.
  • the portion of the second radio channel used for transmitting messages from the central communication site 104 will be designated as the outbound portion of the second channel.
  • the preferred embodiment cross-transceiver mechanism 111 preferably is capable of transmitting a signal in the inbound portion of the first radio channel and is capable of receiving a signal in the outbound portion of the first radio channel.
  • the use of two omni-directional antenna on an antenna tower 106 will typically result in some mutual interference.
  • the two antenna 116, 118 must be mounted on the antenna tower 106 at differing heights and additional filtering in the transceivers 110, 111 may be needed to achieve a high quality radio links.
  • the communication unit 114 preferably is operably connected to a cellular communication network unit 120 such that the unit 120 can transmit signals to and receive signals from the network unit 120.
  • the communication network unit 114 may be a base communication site controller, another central communication site or a communication system switch (e.g., PSTN switch).
  • Processor apparatus 112 is operatively coupled to the transceiver mechanism 110, the cross-transceiver mechanism 111 and the communication unit 114 such that the processor 112 can digitally process a signal received by either the transceiver 110, the cross- - transceiver 111, or the communication unit 114 and subsequently provide the processed signal to one of the devices which did not send the signal to the processor 112 (i.e., either the transceiver 110, cross- transceiver 111, or the communication unit 114).
  • the communication system 100 also indudes at least one remote communication site 102 which is substantially remotely located from the central communication site 104.
  • the remote communication site 102 contains an antenna tower 122 and a site equipment storage unit 124.
  • the site equipment storage unit 124 preferably includes a first transceiver mechanism 126, a channel shifting device 128, and a second transceiver mechanism 130.
  • the first transceiver mechanism 126 is operably connected to the antenna tower 122 to which an antenna 132 is preferably mounted so that the transceiver 126 can transmit and receive signals in the first radio channel through antenna 132.
  • Antenna 132 like antenna 116, may be an omni-directional antenna, sectorized antenna array, or a narrow beam antenna.
  • antenna 132 is an omni-directional antenna configured such that a signal transmitted from antenna 132 will appear to the central communication site 104 to be from another central communication unit within cell 1 and configured such that a signal transmitted by antenna 116 can be received at remote communication site 102.
  • the preferred embodiment first transceiver mechanism 126 preferably is capable of transmitting a signal in the outbound portion of the first radio channel and is capable of receiving a signal in the inbound portion of the first radio channel.
  • the second transceiver mechanism 130 is operably connected to the antenna tower 122 to which an antenna 134 is preferably mounted so that the transceiver 130 can transmit and receive signals in a second radio channel through antenna 134.
  • Antenna 134 like antenna 116, may be an omni-directional antenna, sectorized antenna array, or a narrow beam antenna, in the preferred embodiment antenna 134 is an omni-directional antenna configured such that a signal transmitted from antenna 134 can be received by a mobile communication unit 138 within cell 2 and configured such that a signal transmitted by mobile communication unit 138 can be received at remote communication site 102.
  • the preferred embodiment second transceiver mechanism 130 preferably is capable of transmitting a signal in the outbound portion of the second radio channel and is capable of receiving a signal in the inbound portion of the second radio channel.
  • transceivers 126 and 130 may be incorporated into a single transceiver mechanism.
  • function performed by antenna 132 and 134 could be provided by a single antenna.
  • the channel shifting device 128 shifts the received signal between the first and the second radio channels.
  • the channel shifting device 128 shifts a received signal in the inbound portion of the first radio channel to the outbound portion of the second radio channel.
  • the channel shifting device 128 shifts a received signal in the inbound portion of the second radio channel to the outbound portion of the first radio channel.
  • the channel shifting device 128 may also indude an automatic gain control drcuitry for adjusting the gain of the received signal to a predetermined power level. This gain control drcuitry would insure that a signal transmitted by the first and/or the second transceiver mechanism 126, 130 would have adequate signal power. Thus, when mobile communication unit 138 is near the remote communication site 104, the transmitted signal power could be attenuated. In addition, when mobile communication unit 138 is far from the remote communication site 104, the transmitted signal power could be increased.
  • the communication system 100 also indudes mobile communication unit 136 or 138 which is substantially remotely located from the central communication site 104 and substantially remotely located from the remote communication site 102.
  • the mobile communication unit 136,138 contains transceiver mechanism.
  • the transceiver mechanism preferably is operably configured transmit and receive signals in the first and the second radio channels.
  • the preferred embodiment mobile unit transceiver mechanism preferably is capable of receiving a signal in the outbound portion of either the first or the second radio channels, determining in which radio channels the signal was received, and transmitting a signal in the inbound portion of the determined radio channel.
  • the mobile transceiver can directly communicate with the first transceiver 110 of the central communication site 104 and the first 126 and the second 130 transceiver of the remote communication site 102.
  • remote communication sites e.g., site 102 which frequency shift and repeat a signal transmitted by a central communication site (e.g., site 104) is communication channel reuse.
  • the spedfic first and second radio channels preferably are assigned according to a cellular communication system channel reuse plan based upon a channel reuse pattern (e.g., 3-site, 4-site, 7-site, 21 -site, 49-site, 63-site or 91 -site channel reuse patterns).
  • a channel reuse pattern e.g., 3-site, 4-site, 7-site, 21 -site, 49-site, 63-site or 91 -site channel reuse patterns.
  • the radio channel assigned to the first radio channel may be substantially similar to the radio channel assigned to the second radio channel.
  • the radio channel assigned to the first radio channel may be substantially different from the radio channel assigned to the second radio channel.
  • Each central communication site 104 can be configured to extend communication traffic control to remote communication sites in each of the surrounding cells (i.e., cell 2-cell 7).
  • the radio channel assigned to the first radio channel may be substantially similar to or different from the radio channel assigned to the second radio channel (assodated with the remote communication site 102) and may be substantially similar to or different from the radio channel assigned to the other second radio channels (associated with the other remote communication sites found in cells 3, 4, 5, 6, and 7 which are also served by the central communication site 104).
  • each served remote site may operate with respect to a second radio channel which is assigned according to the cellular communication system channel reuse plan and is substantially different from the first radio channel and is substantially different from the second radio channel assigned to each other remote communication site.
  • each served remote site may operate with respect to a second radio channel which is assigned according to the cellular communication system channel reuse plan and is substantially different from the first radio channel and is substantially similar to the second radio channel assigned to each other remote communication site.
  • each remote site may operate with respect to a second radio channel which is assigned according to the cellular communication system channel reuse plan and is substantially similar to the first radio channel and is substantially similar to the second radio channel assigned to each other remote communication site.
  • each remote site may operate with respect to a second radio channel which is assigned according to the cellular communication system channel reuse plan and is substantially similar to the first radio channel and is substantially different from the second radio channel assigned to each other remote communication site.
  • FIG. 4-2 shows flowchart describing how a signal preferably travels from the cellular communication network unit 120 to mobile communication unit 138.
  • the process begins 200 at a cellular communication network unit 120 when a signal is sent to a central communication site 104.
  • the central communication site 104 receives 202 the signal from the cellular communication network unit 120.
  • the central communication site 102 digitally processes 204 the received signal.
  • a first radio channel is assigned 206 according to a cellular communication system channel reuse plan to the central communication site 104. This first radio channel has inbound and outbound radio channel portions.
  • the central communication site 104 transmits 208' the processed signal in the inbound portion of the first radio channel
  • a remote communication site 102 which is substantially remotely located from the central communication site 104, receives 210' the transmitted signal in the inbound portion of the first radio channel.
  • a second radio channel is assigned 212 according to the cellular communication system channel reuse plan to the remote communication site 102. This second radio channel also has inbound and outbound radio channel portions.
  • the received signal is channel shifted 214 from the first radio channel to the second radio channel at the remote communication site 102.
  • the gain of the shifted signal is adjusted 215 to a predetermined power level.
  • FIG. 5-2 shows flowchart describing how a signal preferably travels from mobile communication unit 138 to the cellular communication network unit 120.
  • the process begins 230 at a mobile communication unit 138.
  • a first radio channel is assigned 232 according to a cellular communication system channel reuse plan to a central communication site 104.
  • the first radio channel has inbound and outbound radio channel portions.
  • a second radio channel is assigned 234 according to the cellular communication system channel reuse plan to a remote communication site 102 which is substantially remotely located from the central communication site 104.
  • the second radio channel has inbound and outbound radio channel portions.
  • the mobile communication unit 138 transmits 236 a signal in the inbound portion of the second radio channel.
  • the remote communication site 102 receives 238 the signal in the inbound portion of the second radio channel.
  • the received signal is channel shifted 240 from the second radio channel to the first radio channel at the remote communication site 102.
  • the gain of the shifted signal is adjusted 242 to a predetermined power level.
  • the remote communication site 102 transmits 244' the shifted signal in the outbound portion of the first radio channel.
  • the central communication site 104 receives 246' the transmitted signal in the outbound portion of the first radio channel.
  • the received signal is digitally processed 248 at the central communication site 104.
  • the processed signal is transmitted 250 from the central communication site 104 to a cellular communication network unit 120 which ends 252 the process.

Abstract

Un système de radiocommunications cellulaire numérique à répéteur téléalimenté est décrit. Le système de communication comprend un site de communication central (106) qui transmet et reçoit des signaux sur une première voie de radiocommunication attribuée en fonction d'un plan de réutilisation de voie de système de communication cellulaire, transmet des signaux à une unité de réseau de communication cellulaire et reçoit des signaux de cette unité, et traite numériquement les signaux reçus pour une transmission ultérieure sur la première voie ou vers l'unité de réseau de communication cellulaire. Le système de communication comprend en outre un site de communication (124) sensiblement éloigné du site de communication central (108), qui reçoit un signal, soit sur la première voie de radiocommunication soit sur une seconde voie attribuée selon le plan de réutilisation de voie du système de communication cellulaire, déplace le signal reçu entre les première et seconde voies, et transmet le signal déplacé sur la nouvelle voie choisie entre les première et seconde voies.
PCT/US1993/002535 1992-03-31 1993-03-18 Procede et appareil pour un repeteur telealimente radioelectrique dans un systeme de radiocommunications cellulaire numerique WO1993020664A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP5517496A JPH07505512A (ja) 1992-03-31 1993-03-18 デジタルセルラ無線通信システムにおける無線遠隔中継器のための方法および装置
CA002133111A CA2133111C (fr) 1992-03-31 1993-03-18 Repeteur radio pour systeme de radiocommunication cellulaire
KR1019940703396A KR0159320B1 (ko) 1992-03-31 1993-03-18 디지탈 셀룰러 무선 통신 시스템의 무선 원격 리피터를 위한 방법 및 장치

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US86085192A 1992-03-31 1992-03-31
US86087292A 1992-03-31 1992-03-31
US860,872 1992-03-31
US860,851 1992-03-31

Publications (1)

Publication Number Publication Date
WO1993020664A1 true WO1993020664A1 (fr) 1993-10-14

Family

ID=27127588

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1993/002535 WO1993020664A1 (fr) 1992-03-31 1993-03-18 Procede et appareil pour un repeteur telealimente radioelectrique dans un systeme de radiocommunications cellulaire numerique

Country Status (5)

Country Link
JP (1) JPH07505512A (fr)
KR (1) KR0159320B1 (fr)
CA (1) CA2133111C (fr)
MX (1) MX9301831A (fr)
WO (1) WO1993020664A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997032442A1 (fr) * 1996-02-27 1997-09-04 Airnet Communications Corporation Plan de systeme cellulaire utilisant des traducteurs intra-bande
EP0977380A1 (fr) * 1998-07-30 2000-02-02 Societé Francaise du Radiotéléphone SRF Système de radiocommunication cellulaire mettant en oeuvre une répétition de données en aval d'une station de base, et dispositif de répétition de données correspondant
EP1133839A1 (fr) * 1998-11-24 2001-09-19 AirNet Communications Corporation Traducteur dans la bande a acces multiple par repartition dans le temps ayant un retard dans des voies multiples pour permettre une diversite selective et une commande automatique de niveau
US6950506B2 (en) 2001-11-08 2005-09-27 Bellsouth Intellectual Property Corporation Method and system for paying prepaid communications credit
WO2008008249A2 (fr) 2006-07-14 2008-01-17 Lgc Wireless, Inc. Système et procédé de fourniture de capacité dédiée dans un réseau cellulaire

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3762609B2 (ja) * 2000-03-15 2006-04-05 シャープ株式会社 通信装置および周波数スペクトラム反転演算方法およびプログラム記憶媒体

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4718108A (en) * 1986-05-19 1988-01-05 Motorola, Inc. Improved multiple site communication system
US5038399A (en) * 1990-05-21 1991-08-06 Motorola, Inc. Method for assigning channel reuse levels in a multi-level cellular system

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4718108A (en) * 1986-05-19 1988-01-05 Motorola, Inc. Improved multiple site communication system
US5038399A (en) * 1990-05-21 1991-08-06 Motorola, Inc. Method for assigning channel reuse levels in a multi-level cellular system

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997032442A1 (fr) * 1996-02-27 1997-09-04 Airnet Communications Corporation Plan de systeme cellulaire utilisant des traducteurs intra-bande
AU750264B2 (en) * 1996-02-27 2002-07-11 Airnet Communications Corporation Cellular system plan using in band-translators
EP0977380A1 (fr) * 1998-07-30 2000-02-02 Societé Francaise du Radiotéléphone SRF Système de radiocommunication cellulaire mettant en oeuvre une répétition de données en aval d'une station de base, et dispositif de répétition de données correspondant
FR2781950A1 (fr) * 1998-07-30 2000-02-04 Sfr Sa Systeme de radiocommunication cellulaire mettant en oeuvre une repetition de donnees en aval d'une station de base, et dispositif de repetition de donnees correspondant
EP1133839A1 (fr) * 1998-11-24 2001-09-19 AirNet Communications Corporation Traducteur dans la bande a acces multiple par repartition dans le temps ayant un retard dans des voies multiples pour permettre une diversite selective et une commande automatique de niveau
EP1133839A4 (fr) * 1998-11-24 2004-07-14 Airnet Communications Corp Traducteur dans la bande a acces multiple par repartition dans le temps ayant un retard dans des voies multiples pour permettre une diversite selective et une commande automatique de niveau
US6950506B2 (en) 2001-11-08 2005-09-27 Bellsouth Intellectual Property Corporation Method and system for paying prepaid communications credit
US7257207B2 (en) 2001-11-08 2007-08-14 Bellsouth Intellectual Property Corporation Method and system for paying prepaid communications credit
WO2008008249A2 (fr) 2006-07-14 2008-01-17 Lgc Wireless, Inc. Système et procédé de fourniture de capacité dédiée dans un réseau cellulaire

Also Published As

Publication number Publication date
KR950701181A (ko) 1995-02-20
CA2133111A1 (fr) 1993-10-14
MX9301831A (es) 1994-01-31
KR0159320B1 (ko) 1998-12-01
CA2133111C (fr) 2000-02-01
JPH07505512A (ja) 1995-06-15

Similar Documents

Publication Publication Date Title
US5887261A (en) Method and apparatus for a radio remote repeater in a digital cellular radio communication system
US6078815A (en) Method and apparatus for allocating radio channels
AU668008B2 (en) Communication management technique for a radiotelephone system including microcells
US4144496A (en) Mobile communication system and method employing frequency reuse within a geographical service area
US6895218B2 (en) Method for in-building distribution using wireless access technology
US7062276B2 (en) Method and system for reducing wireless multi-cell interferences through segregated channel assignments and segregated antenna beams
US5537682A (en) Radio frequency communications system
US6370384B1 (en) Frequency re-use planning for wireless communications system using wireless translating repeaters
CN1319406C (zh) 用于分扇区无线电通信系统的编码分配
US7151937B2 (en) Method and system for reducing wireless multi-cell interferences through segregated channel assignments and segregated antenna beams
CN1106725C (zh) 具有双模式带宽控制的卫星通信系统
JP2001522160A (ja) 非陸上セルラー移動体遠隔通信局
US6198925B1 (en) Method and apparatus for intelligent microcell and antenna selection in digital cellular telephone systems
USRE41781E1 (en) Cellular radio routing system
JP2573076B2 (ja) 高容量セクタ化セルラ通信システム
JP2002511676A (ja) 無線基地局において無線信号を取り扱うための方法及び装置
US5960352A (en) Multilayer cellular mobile radio network with optimized frequency re-use plan, and associated method
US5825764A (en) TDMA base station arrangement
US6748216B1 (en) Method and apparatus for intelligent microcell and antenna selection in digital cellular telephone systems
US6127988A (en) Fixed wireless base station antenna arrangement
RU2108674C1 (ru) Ячеистая система радиосвязи
WO1993020664A1 (fr) Procede et appareil pour un repeteur telealimente radioelectrique dans un systeme de radiocommunications cellulaire numerique
KR940002608B1 (ko) 셀룰러 무선 전화 통신 시스템 셀 위치 설비용 장치
CA1336519C (fr) Systeme de communication cellulaire sectorise de grande capacite
WO1999026357A1 (fr) Ameliorations apportees aux systemes de telecommunication aerienne et procedes de conception

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): CA JP KR

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): AT BE CH DE DK ES FR GB GR IE IT LU MC NL PT SE

DFPE Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101)
121 Ep: the epo has been informed by wipo that ep was designated in this application
WWE Wipo information: entry into national phase

Ref document number: 2133111

Country of ref document: CA

WWE Wipo information: entry into national phase

Ref document number: 1019940703396

Country of ref document: KR

122 Ep: pct application non-entry in european phase