JPH07505512A - Method and apparatus for a wireless remote repeater in a digital cellular wireless communication system - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] Method and apparatus for wireless remote repeater in digital cellular wireless communication system FIELD OF THE INVENTION The present invention relates to cellular wireless communication systems, and more particularly to digital wireless communication systems. Relating to a method and apparatus for a wireless remote repeater mechanism in a lula wireless communication system. do.

Background of the invention Cellular wireless communication systems typically include a number of central communication base sites or bases. Contains base 5ites. Each central communication site is within the service area has service area coverage to serve mobile communication units of Ru. The service area typically covers the services of adjacent remote base sites. Coverage areas overlap to provide a virtually contiguous service area. It is arranged so that The substantially continuous service area covers a certain service area. from one base site serving other service areas. is interrupted by handing off the mobile communication unit to an adjacent base site. Provide no service.

Communication between the central communication site and mobile communication units is typically via a cellular communication system. A pair of frequency channels (all i.e., the transmission and reception frequencies). Activation (activation) Depending on the activation, the mobile communication unit :1ocal) radio frequency spectrum for transmitting control signals from a central communication site. Search for the file. The transmission of control signals from the local communication site is a radio frequency broadcast. Control channel (radio frequency broadcast con trol channel: BCCH). The BCCH is Forming a wireless communications system access request to a central communications site (f o rmat) and required by the mobile communication unit to encode Contains specific information. Group Special Mobile (Gr o u pS special Mobile: GSM) General Yoo 0-7 pacellular communication system is is an example of a system using a format that includes a CCH such as A pan-European cellular communications system is established by the European Telecommunications Standards Organization (Europe). ean Telecommunication Standards In5ti tute: ETSI) and is incorporated herein by reference. , as shown in the GSM recommendations by Motorola.

Timing information and a central communication site transmitting the information via the BCCH Specifies the local central communications site ID for, the format of the outgoing access request formatting information for A number of constraints may include information identifying the frequency for transmitting specific access requests. The information will be sent.

Furthermore, the format information further improves the communication system through time-division multiple access ( TDMA) and the time slot in which the access request should be sent. can be identified.

The mobile communication unit detects and decodes information received on the BCCH. Then, it continues to send an access request to the local central communication site. Local When the central communication site receives an access request from a mobile communication unit, it The mobile communications unit transmits a signal identifying the resources available to communicate with the central communications site. respond by sending a message to the target.

Others located in other nearby service areas served by other central communication sites to limit noise in cellular communication systems due to communication between mobile communication units. However, there are However, reuse of a limited number of communication resources is possible within the service area of a cellular communication system. It is done. The reuse of said communication resources creates unacceptable noise in the communication channel. To ensure that central communications sites assigned to the same communications resource do not Geographically separated. communication channels by providing sufficient geographic spacing. noise is limited. However, geographic spacing does not provide adequate signal-to-noise ratio. (negligible noise in the communication channel) and the available Communication is difficult because not all communication resources can be used in each service area. System capacity is limited.

To improve the capacity of cellular communication systems by increasing the efficiency of reuse of communication resources , the service area of a central communication site can be divided into sectors, where each sector A vector has a certain percentage of available communication resources (i.e., communication channels). sa By dividing the service area into sectors, the required geographical spacing can be achieved with appropriate signals. can be reduced while maintaining the noise-to-noise ratio. For example, Motorola Inc. U.S. Patent No. 4,128.740, assigned to Holated area)-6 sector communication resource reuse pattern is disclosed. Disclosed in this patent As shown, each cell is divided into six sectors, and each sector is approximately Contains 1/24th (1/24th) of the available communication resources. four celsas The pattern of communication resources is repeated for each site. This communication resource reuse pattern was further filed on January 2, 1990, and also filed by Motorola Inc. Disclosed in pending U.S. Patent Application No. 07/459,624, assigned to Ted. The reuse pattern can be reduced to one cell site, as shown in Figure 1. For those skilled in the art, there are many Other reuse patterns may exist for use in cellular communication systems. It is understood that these reuse patterns are not limited to But, 3. 7. 21. Includes 49°63.91 site reuse patterns.

After allocating certain communication resources for use by a mobile communication unit, said The local central communications site is typically located at the local central communications site. transmitter/receiver with a mobile communication unit through its allocated communication channel resources. Allocate to service any subsequent communication. The central communication site The target transceiver then directs the mobile communications unit's communications to the target communications unit. lead to The target communication unit is another mobile communication unit within the same service area. It can be a mobile communications unit within another service area, or it can be a public exchange. It may also be a subscriber to a telephone network (PSTN).

Dense cellular communication systems with sufficient spectrum can serve small geographic areas. By using microcells to service large numbers of users in urban environments can be serviced. However, in rural or suburban areas At lower user densities, large signal propagation losses and large infrastructure The cost of communication greatly limits the economic viability of such communication systems. stomach to provide equal service coverage for urban, suburban, and urban environments. is important in establishing a complete cellular service, so the cellular communication system There is a great need for a low cost means of deploying stems.

Another consideration is the lack of support for central communication sites due to increased competition for frequency spectrum. The coverage areas of the services are kept relatively close together to allow for frequency reuse. Therefore, it must be reduced. On the other hand, the service coverage of the central communication site Reducing the area is the amount of central communication needed to cover a given geographical area. Increase the number of trust sites. Therefore, the overall cost of a cellular communication system It is desirable to minimize the cost of individual central communications sites so that .

Summary of the invention The present invention utilizes radio frequency signals, which are typically abundant in areas with low communication traffic density. spectrum to serve larger geographic areas and at lower cost. By efficiently trading, the cost of the communication system mentioned above can be reduced. overcome problems. Furthermore, the present invention can be used if sufficient radio spectrum is available. Used in microcellular applications as an alternative to wired connections between Lucite controllers can. The present invention provides a digital cellular radio with a remote repeater and a central communications site. Provide communication systems. The central communications site provides channel reuse for cellular communications systems. transmitting and receiving signals on a first wireless channel assigned according to the usage plan; transmits a signal to a cellular communications network and transmits a signal to the cellular communications network. receive a signal from said first wireless channel or by a cellular Digitally processes the received signal for transmission to the communication network unit. Ru. The remote repeater (i.e., In other words, the telecommunications site) has adopted a channel reuse plan for the cellular communication system. Therefore, the signal is transmitted via the assigned first radio channel or second radio channel. and transmit the received signal to the first wireless channel and the second wireless channel. and channel-shift the shifted signal between the first and second channels. the other of the wireless channels.

As a result of this configuration of communication systems, the hardware and The need for communications and software is less than that of the central communications site, but it is The telecommunications site shall include a mechanism or means for communicating with a cellular communications network unit. This is because there is no need for a mechanism to process digitally received signals. However, This reduces the financial costs of telecommunications sites and thereby improves the communication system. The overall cost of a central communications system in areas with low communications traffic density reduced by using these lower cost telecommunications sites in conjunction with can.

Brief description of the drawing 1-1 and 1-2 illustrate a preferred embodiment digital cellular wireless communication system. FIG.

Figures 2-1 and 2-2 are diagrams illustrating the central communications site of the preferred embodiment. Ru.

Figures 3-1 and 3-2 are illustrations of preferred embodiment telecommunications sites. Ru.

Figures 4-1 and 4-2 illustrate each preferred embodiment digital cellular wireless communication system. system from the cellular communication network unit to the mobile communication unit. 3 is a flowchart showing how a signal progresses.

Figures 5-1 and 5-2 illustrate each preferred embodiment digital cellular wireless communication system. system from the mobile communication unit to the cellular communication network unit. It is a flowchart showing how a signal progresses as follows.

Description of the preferred embodiment Referring now to Figure 1-1, a remote repeater preferred embodiment digital cellular radio communication system 100 with rs) 102 It is shown.

The communication system 100 includes at least one central communication site 104. the center Communication site 104 includes antenna tower 106 and site equipment storage unit 108 including. As shown in FIG. 2=1, the site equipment storage unit 108 is preferably or a transceiver mechanism 110, a communication unit 114, and a processor device 112. including.

A transceiver mechanism 110 is operably connected to the antenna tower 106 and An antenna 116 is preferably mounted on the tower 106, thereby allowing the transmitter/receiver to 110 transmits the signal on the first wireless channel via antenna 116 and transmits the signal. configured to receive. The antenna 116 is omni-directional. rect 1ona l) antenna, sectorized antenna array, or can be a narrow beam antenna. Those skilled in the art will know the best type of antenna. It will be appreciated that this will vary depending on the specific facility environment. In a preferred embodiment, Antenna 116 is an omnidirectional antenna. Furthermore, it is understood by those skilled in the art that the wireless channel refers to a pair of channel bands used for a communication link by two communication devices It would be obvious to do so. In the following discussion, the channel bands for this pair are Represented from the perspective of site 104. More precisely, messages can be sent to a central communications site. The portion of the first wireless channel used to transmit to said first channel 104 is This is referred to as the inbound portion of the channel. Similarly, central communication the first wireless channel used to transmit messages from site 104; The portion of the channel is referred to as the outbound portion of said first channel. It will be done. Those skilled in the art will understand, but are not limited to, the first wireless channel. channel is a code-division channel (e.g., wide left sequence and frequency hopping). GSM-based spread spectrum channels), time-division channels (e.g. GSM-based channels), and several types of wireless channels, including frequency division channels. It will be understood that it can be any of the following. for simplicity , the following portion of this detailed description will be explained using frequency division channels. Said good The transceiver mechanism 110 of the preferred embodiment preferably is located at the output of said first wireless channel. to transmit the signal by a minute and into the input portion of the first wireless channel; Therefore, signals can be received.

The communication unit 114 is preferably connected to a cellular communication network unit 120. operably coupled, whereby said unit 114 is connected to network unit 1. 20 and receiving signals from the network unit 120. will be made possible. The communication network unit 114 is a base communication site controller. controller, other central communications site or communications system switch (e.g., PST N exchanges).

Processor unit 112 is operable to transmit/receive mechanism 110 and communication unit 114. functionally coupled to enable the processor 112 to be connected to the transceiver 110 or communication digitally processing the signals received by unit 114 and subsequently processing the signals received by unit 114; The device that did not send the processed signal to the processor 11-2 (i.e. , transceiver 110 or communication unit 114). will be accomplished.

The communication system 100 is also located substantially remotely from the central communication site 104. The network includes at least one telecommunications site 102 located at one site. The telecommunications site 102 is Includes an antenna tower 122 and a site equipment storage unit 124.

As shown in FIG. 3-1, the site equipment storage unit 124 is preferably 1 transceiver mechanism 126, channel shift device r11128, and a second transceiver mechanism It includes a mechanical mechanism 13o.

the first transceiver mechanism 126 is operably connected to the antenna tower 122; An antenna 132 is preferably mounted on the antenna tower 122, thereby A transmitter/receiver 126 transmits a signal on the first wireless channel via an antenna 132. configured to send and receive messages. The antenna 132 is the antenna 11 6 as well as omnidirectional antennas, sectorized antenna arrays, or narrow beam antennas. It can be used as a system antenna. In a preferred embodiment, antenna 132 is The signal transmitted from the antenna 132 is transmitted from the mobile communication unit 136 in cell 1. configured to be visible to central communications site 104 as a central communication site and to antenna 116. Thus, the transmitted signal is configured to be received at the telecommunications site 102. It is a narrow beam antenna. A narrow beam antenna ( That is, using a directional antenna) typically Creates a high-quality wireless link (even horizontal line-of-sight) between two communication sites That will happen. In a preferred embodiment, the first transceiver mechanism 126 is connected to the first radio. transmitting a signal at the entrance of the channel and of the first wireless channel; Preferably, the signal can be received at the output part.

A second transceiver mechanism 130 is operably connected to the antenna tower 122 and An antenna 134 is preferably mounted on the antenna tower 122, thereby transmitting and receiving data. device 130 transmits and receives signals on a second wireless channel via antenna 134; be made able to do so. The antenna 134, like the antenna 116, Omnidirectional antenna, sectored antenna array, or narrow beam antenna can do. In a preferred embodiment, antenna 134 is an omnidirectional antenna. Yes, the signal transmitted from antenna 134 is transmitted to mobile communication unit 138 in cell 2. configured to be received by and transmitted by mobile communication unit 138. The remote communication site 102 is configured such that the received signal can be received by the telecommunications site 102. Furthermore, this The second wireless channel, like the first wireless channel, may be used for remote communication. It is understood to have a pair of channel bands represented from the perspective of the communication site 102. It will be. More precisely, in order to send the message to the telecommunications site 102 The part of the second radio channel used for this purpose is called the incoming part of the second channel. Ru. Similarly, the The part of the second wireless channel can be referred to as the outgoing part of the second channel.

Also, similar to the first wireless channel, the description will be based on frequency division channels. However, other types of wireless channels may also be used without departing from the spirit and scope of the invention. Available for use. The second transceiver mechanism 130 of the preferred embodiment is connected to the second wireless channel. said second wireless channel; It is preferable that the signal can be received by the input portion of the signal.

It will be appreciated by those skilled in the art that the functions of transceivers 126 and 130 can be combined into a single transmitter function. That will be understood. Similarly, antennas 132 and 134 perform functions can be provided by a single antenna. Elements of telecommunications site 102 These two possible combinations of TDMA or CDMA format radio channels is used and two or more timeslots or spreads of the time frame are used. Two or more code-divided channels of a band signal burst are combined into a single set of devices. It can also be easily implemented when transmitted or received by a device.

The channel shifter 128 shifts the received signal to the first and second wireless channels. Shift between flannel. The channel shift device 128 shifts the second wireless channel Shifting the received signal at the input portion of the first wireless channel to the input portion of the first wireless channel. . Similarly, channel shifter 128 shifts the received signal of the outgoing portion of the first wireless channel. is shifted to the output portion of the second radio channel. Channel shifter 128 also an automatic gain control circuit for adjusting the gain of the received signal to a predetermined power level; can be included. The gain control circuit is connected to the first and/or second transceiver mechanism. 126, 130 to ensure that the signals transmitted by 126, 130 have adequate signal power . Therefore, if mobile communication unit 138 is proximate to the telecommunications site 104, When transmitting a signal, the transmitted signal power can be attenuated. In addition, mobile communication units 138 is remote from the telecommunications site 104, the transmitted signal Power can be increased.

Those skilled in the art will understand how to use the telecommunications site 102 of these preferred embodiments. Substantial cost savings in the basic equipment of cellular communication systems can thus be achieved. It will be understood that it is possible. This cost savings is due in part to processor 11 2 and communication unit 114, and cellular communication network unit 120. by removing the associated connections.

The communication system 100 is also located substantially remote from the central communication site 104. and a mobile communication unit 136 located substantially remote from the telecommunications site 102. or 138. The mobile communication unit 136.1.38 includes a transceiver mechanism. nothing. The transceiver mechanism preferably receives signals by said first and second wireless channels. operably configured to transmit and receive signals. Mobile unit of preferred embodiment The cutter/receiver arrangement is preferably arranged by an output of said first or second radio channel. the signal, determine by which radio channel the signal was received, and A signal can be transmitted on the input portion of the determined wireless channel. However, Thus, the mobile transceiver is connected to the first transceiver 110 of the central communication site 104 and can communicate directly with a second transceiver 130 of the telecommunications site 102; .

Frequency shifting a signal transmitted by a central communications site (e.g., site 104) 1. Using a telecommunications site (e.g. Cy!-102) that connects and relays One particularly important aspect is the reuse of communication channels. the specific first and second The wireless channels preferably have a channel reuse pattern (e.g. 3 sites, 4 services). site, 7 sites, 21 sites, 49 sites, 63 sites or 91 sites According to the channel reuse plan of the cellular communication system based on the channel reuse pattern) Preferably assigned. Depending on the specific channel reuse plan used, The wireless channel assigned to the first wireless channel is substantially the same as the second wireless channel. It can be the same as the radio channel assigned to the line channel. Also, before The wireless channel assigned to the first wireless channel is substantially the same as the second wireless channel. It can also be different from the radio channel assigned to the channel.

Each central communications site 104 provides communications traffic control to surrounding cells (i.e. Cell 2 to Cell 2 can be configured to extend to telecommunications sites in each of Cell 2 to Cell 2.

Depending on the particular channel reuse plan used (related to central communications site 104) The radio channel assigned to the first radio channel (telecommunications a wireless channel assigned to said second wireless channel (associated with site 102); may be substantially the same as or different from the Cells 3.4.5, 6. are also served by central communication site 104. oh and other telecommunications sites found in It may be substantially the same as the assigned radio channel, or it may be different. It can also be used as

For example, each serviced remote site may rechannel a cellular communications system. allocated according to a usage plan and substantially different from the first radio channel; and substantially a second wireless channel assigned to each other telecommunications site. It is possible to operate on a different second wireless channel.

In addition, each serviced remote site must rechannel the cellular communications system. allocated according to a usage plan and substantially different from the first radio channel; and substantially a second wireless channel assigned to each other telecommunications site. It is also possible to operate on the same second radio channel.

Additionally, each remote site has a channel reuse plan for its cellular communications system. and is substantially the same as the first wireless channel and further substantially the same as the first wireless channel. a second radio channel that is the same as the second radio channel assigned to each other telecommunications site; It is also possible to operate on line channels.

Finally, each remote site has a channel reuse plan for its cellular communication system. and substantially the same as said first wireless channel; different from said second radio channel assigned to each other telecommunications site in It is also possible to operate on a second wireless channel.

As an example, FIG. 4-1 shows how signals are preferably connected to a cellular communications network. Flowchart showing how to proceed from unit 120 to mobile communication unit 138 It is.

This process occurs in the cellular communications network unit 120 where the signal is transmitted to a central communications network. It begins at box 200 when sent to site 104 . Central communication site 10 4 receives signals from cellular communication network unit 120 in box 202. Receive. Central communications site 102 transmits its received signals in box 204. Process digitally. Further, in box 206 the first wireless channel is to the central communications site 104 in accordance with the cellular communications system's channel reuse plan. Assigned. This first radio channel has incoming and outgoing radio channel parts. do. Central communications site 104 receives the processed signal in box 208. It is transmitted on the outgoing part of one wireless channel. After that, from the central communication site 104 Telecommunications site 102 , located substantially remotely, transmits in box 210 the received signal is received on an output portion of the first wireless channel. Additionally, a second radio The channel is entered into the cellular communication system's channel reuse plan in box 212. Therefore, it is assigned to telecommunications site 102. This second radio channel also It has incoming and outgoing radio channel parts. Subsequently, the received signal is a first wireless channel at telecommunications site 102 as shown in box 214; to a second wireless channel. and in box 215 Then, the gain of the shifted signal is adjusted to a predetermined power level. Next, remote communication The receiving site 102 transmits the shifted signal to the second wireless channel in box 216. Transmit by the mountain part of the channel. Finally, in box 218, the shift The received signal is transmitted to the peak portion of the second radio channel at the mobile communication unit 138. is received, which terminates the process as shown in box 220.

Also, by way of example, FIG. Flow illustrating how signals preferably progress to work unit 120 It is a chart. This process is carried out in box 23 at mobile communication unit 138. Starts with 0. At box 232, the first wireless channel is connected to a cellular communication channel. allocated to the central communications site 104 according to the communication system's channel reuse plan. It will be done. The first radio channel has incoming and outgoing radio channel portions. second The wireless channel is determined in box 234 by a channel reuse meter for a cellular communication system. a telecommunications site located substantially apart from the central communications site 104 according to the image; 102. The second radio channel is the incoming and outgoing radio channel part. have a minute. Mobile communication unit 138 connects to a second wireless channel in box 236. The signal is transmitted through the input part of the channel. Telecommunications site 102 is located in box 238 A signal is received at the incoming portion of the second wireless channel. Continue receiving The signal is sent to the second wireless channel at the telecommunications site 102 by box 240. channel to a first wireless channel.

The gain of the shifted signal is adjusted to a predetermined power level in box 242. Ru. Telecommunications site 102 then transmits the shifted communications in box 244. The signal is transmitted on the incoming portion of the first wireless channel. Signal communication site 104 is box At step 246, the transmitted signal is received by the input portion of the first wireless channel. believe The received signal is sent to the central communications site 104 by box 248. Processed digitally. Finally, the processed signal is centered by box 250. from the communications site 104 to the cellular communications network unit 120; The process ends at box 252.

Referring now to FIGS. 1-2, another preferred embodiment having a remote repeater 102 A digital cellular wireless communication system 100 according to the present invention is illustrated. The communication system 1 00 includes at least one central communication site 104. The central communication site 104 includes an antenna tower 106 and a site equipment storage unit 108. Figure 2-2 As shown, the site equipment storage unit 108 includes a transceiver mechanism 110; Includes a transceiver mechanism 111, a communication unit 114, and a processor device 112 is preferable.

The transceiver mechanism 110 is operably connected to the antenna tower 106 and Antenna 118 is attached to antenna tower 106, thereby transmitting and receiving device 110 only transmits signals on a first wireless channel via antenna 118. It is preferable to be able to receive one. Antenna 118 is an omnidirectional antenna, sectorized. antenna array, or a narrow beam antenna. A person skilled in the art should It will be appreciated that the best form of antenna will vary depending on the particular installation environment.

In the preferred embodiment, antenna 118 is an omnidirectional antenna. Furthermore, those skilled in the art For some users, a wireless channel is one used for a communication link by two communication devices. It will be understood that paired channel bands are meant. In the following explanation, this Paired channel bands are expressed from the perspective of the central communication site 104. more precisely , the first entity used to send the message to the central communication site 104. The line channel portion is the inbound port of the first channel. ion).

Similarly, the The first wireless channel portion is the outbound portion of the first channel. Porti.

n). Those skilled in the art will understand that the first wireless channel is limited to but not code-division channels (e.g. direct sequence and frequency host). spread spectrum channel), time division channel (e.g. GSM-based several types of wireless channels, including frequency-division channels) and frequency-division channels. It will be appreciated that it could be any of the channels. explanation For simplicity, the rest of the detailed explanation is explained using frequency-division channels. do. The preferred embodiment transceiver mechanism 110 is located at the peak of the first wireless channel. and transmitting a signal by the input portion of the first wireless channel. It is preferable that the signal can be received.

The transceiver mechanism 111 (hereinafter referred to as a cross-transceiver) iver) 111) is operably connected to the antenna tower 106 and An antenna 116 is preferably mounted on the antenna tower 106, thereby Cross transceiver 111 transmits signals via antenna 116 on a second wireless channel. configured to transmit and receive signals. Antenna 116 is an omnidirectional antenna. antenna, sectorized antenna array, or narrow beam antenna. Ru. In the preferred embodiment, antenna 116 is an omnidirectional antenna. moreover, A second wireless channel used to transmit messages to the central communication site 104. The channel portion is referred to as the input portion of the second radio channel. Similarly, the central communications site of said second wireless channel used for transmitting messages from host 104; The portion is referred to as the peak portion of the second radio channel. Preferred embodiment cross feed A receiver mechanism 111 transmits a signal over the incoming portion of said first wireless channel. and be able to receive a signal through the peak portion of the first wireless channel. is preferred.

How much does it typically cost to use two omnidirectional antennas on antenna tower 106? This results in mutual interference.

Therefore, the two antennas 116, 118 are mounted on the antenna tower 106 at different heights. must be installed in the transceiver 110, 111, and waves would be necessary to achieve a high quality wireless link.

Communication unit 114 preferably operates on cellular communication network unit 120. network unit 120 , such that the unit 114 is connected to the network unit 120 . to transmit signals to and receive signals from the network unit 120. configured. Communications network unit 114 is a base communications site controller. , other central communications site or communications system switch (e.g., PSTN switch) It can be done.

The processor device 112 includes the transceiver mechanism 110, the cross transceiver mechanism 111, and and communication unit 114, thereby causing the processor 11 2 is the transceiver 110, the cross transceiver 111, or the communication unit 11 digitally processing the signal received by 4 and subsequently processing the signal received by One of the devices that did not send a signal to processor 112 (i.e., device 110, cross transceiver 111, or communication unit 114). It is composed of sea urchins.

The communication system 100 may also be located substantially remote from the central communication site 104. 102, including at least one telecommunications site 102. The telecommunications site 102 is includes an antenna tower 122 and a site equipment storage unit 124. Shown in Figure 3-2. As shown, the site equipment storage unit 124 includes a first transceiver mechanism 126. , a channel shifter 128 , and a second transceiver mechanism 130 . Yes.

the first transceiver mechanism 126 is operably connected to the antenna tower 122; An antenna 132 is preferably mounted on the antenna tower 122, thereby Transceiver 126 transmits a signal via antenna 132 over a first wireless channel. Configured to send and receive. Antenna 132 is the same as antenna 116. as well as omnidirectional antennas, sectored antenna arrays, or narrow beam antennas. It can be used as an antenna. In a preferred embodiment, antenna 132 is A signal transmitted from cell 132 is transmitted to central communications site 104 from other central communications sites within cell 1. configured to appear to be from the unit and transmitted by antenna 116 an omnidirectional amplifier configured to receive the transmitted signal at the telecommunications site 102; It is said to be Tena. The first transceiver mechanism 126 of the preferred embodiment is connected to the first wireless channel. an output portion of the first wireless channel and an input portion of the first wireless channel; Preferably, the signal can be received at a certain point.

The second transceiver arrangement 130 is operably coupled to the antenna tower 122; Antenna 134 is preferably mounted on the antenna tower 122, thereby transmitting Receiver 130 transmits a signal over a second wireless channel through antenna 134 and is configured to be able to receive the information.

Antenna 134, like antenna 116, is an omnidirectional antenna, sectorized It can be an antenna array or a narrow beam antenna. Preferred embodiment In this case, the antenna 134 is configured so that the signal transmitted from the antenna 134 moves within the cell 2. mobile communication unit 13 and configured to be received by communication unit 138; 8 can be received at the telecommunications site 102. This is an omnidirectional antenna. Second transceiver mechanism 130 of the preferred embodiment is capable of transmitting a signal by an output portion of said second wireless channel and said Preferably, the signal can be received by the incoming part of the second radio channel. Yes.

Using two omnidirectional antennas 132, 134 on the antenna tower 122 generally results in some mutual interference. Therefore, high quality radio In order to achieve the link, the two antennas 132, 134 are connected to an antenna tower. 122 and must be mounted at different heights on the transceiver 126.130 An additional wave would be necessary.

Those skilled in the art will appreciate that the functionality of transceivers 126 and 130 can be incorporated into a single transceiver mechanism. It will be understood that it is possible.

Similarly, the functions performed by antennas 132 and 134 are performed by a single antenna. It can also be provided. These two possibilities of elements at telecommunications site 102 Possible combinations are those in which TDMA or CDMA type radio channels are used and two or more time slots or broadband signals in a time frame A burst of two or more code division channels transmitted by a single set of devices Or it can be easily implemented if it can be received.

The channel shifter 128 shifts the received signal to the first and second wireless channels. Shift between flannel. The channel shifting device 128 inputs the first wireless channel. The signal received on the outgoing portion of the second radio channel is shifted to the outgoing portion of the second radio channel.

Similarly, the channel shifter 128 receives on the incoming portion of the second wireless channel. Shifting the signal to the outgoing portion of the first radio channel. The channel shift device 128 Also includes automatic gain control to adjust the gain of the received signal to a given power level. Can include circuitry. This gain control circuit controls the first and/or second transmission. that the signal transmitted by the receiver mechanism 126.130 has adequate signal power; guaranteed. Therefore, mobile communication unit 138 may be in close proximity to telecommunications site 104. When the signal power is low, the transmitted signal power will be attenuated. In addition, mobile communications If unit 138 is located far from telecommunications site 104, the transmitted signal Power will be increased.

Those skilled in the art will understand how to use the telecommunications site 102 of these preferred embodiments. Substantial cost savings in the basic equipment of cellular communication systems can be achieved. will understand. This cost savings is due in part to processor 112 and communication unit 114, as well as an associated connection to cellular communication network unit 120. By removing connections.

Communication system 100 is also located substantially remotely from central communication site 104 and A mobile communication unit 136 or contains 138. The mobile communication unit) 136, 138 includes a transceiver mechanism. Applicable A transceiver mechanism preferably transmits signals via said first and second wireless channels. and is operably configured to send and receive. The mobile unit of the preferred embodiment a transceiver mechanism receives a signal via a peak portion of the first or second wireless channel; determining by which wireless channel the signal was received; and It is preferable that the signal can be transmitted by the input part of the wireless channel Yes. Accordingly, the mobile transceiver is connected to the first transceiver of the central communication site 104. transmitter 110 and a first transceiver 126 and a second transceiver of the telecommunications site 102. can communicate directly with the transceiver 130 of.

Frequency shifting a signal transmitted by a central communications site (e.g., site 104) By using a telecommunications site (e.g., site 102) that connects and relays A particularly important aspect of this is the reuse of communication channels. the specific first and second The wireless channel has a channel reuse pattern (e.g., 3 sites, 4 sites, 7 sites). Site, 21 Site, 49 Site, 63 Site, or 91 Site Channel Reuse Part allocation according to the channel reuse plan of the cellular communication system based on Preferably. Depending on the particular channel reuse plan used, the first The radio channel assigned to the line channel is substantially assigned to the second radio channel. It can be the same as the wireless channel that is applied. Further, the first wireless The radio channel assigned to the channel is substantially assigned to the second radio channel. It can also be different from the radio channel used.

Each central communications site 104 provides communications traffic control to surrounding cells (i.e. Cell 2 to Self) can be configured to extend to each telecommunications site. used Depending on the specific channel reuse plan to (associated with the communication site 104) is substantially a second radio channel. a wireless channel assigned to a channel (associated with said telecommunications site 102); may be substantially the same as or different from the other second wireless channel. (cells 3.4., which are also served by the central communications site 104) 5. 6. and related to other telecommunications sites found in 7) It can be substantially the same as the wireless channel or it can be different.

For example, each serviced remote site may rechannel a cellular communications system. allocated according to a usage plan and substantially different from said first wireless channel; and substantially different from the second radio channel assigned to each other telecommunications site. The second wireless channel can be operated on a second wireless channel.

In addition, each serviced remote site must rechannel the cellular communications system. allocated according to a usage plan and substantially different from said first wireless channel; and further a second wireless channel assigned to substantially each other telecommunications site. It is also possible to operate on the same second radio channel as the radio channel.

Furthermore, each remote site has a channel reuse plan for its cellular communication system. the first radio channel is assigned and is substantially the same as said first radio channel and further substantially the same as the second radio channel assigned to each other telecommunications site. It is also possible to operate on a second wireless channel.

Finally, each remote site has a channel reuse plan for its cellular communications system. and is substantially the same as said first radio channel and further implemented. a second radio channel qualitatively different from the second radio channel assigned to each other telecommunications site; It can also operate on two radio channels.

As an example, FIG. Flowchart illustrating how signals preferably proceed to the mobile communication unit 138. It is a chart. This process is shown in box 200, with the signal centered When transmitted to communication site 104, cellular communication network unit 120 is started. The central communication site 104, in box 202, 120 receives signals from a communication network unit 120; Central communication site 102 digitally processes the received signal in box 204. Sara In box 206, a channel reuse plan for a cellular communication system is configured. A first wireless channel is then assigned to the central communication site 104 . This first One radio channel has incoming and outgoing radio channel parts. The central communication site The port 104 transmits the processed signal to a first wireless channel in box 208'. Send in the entry section of the file. Continue to remain substantially away from the central communications site 104. In box 210', the telecommunications site 102 located at the The received signal is received at the incoming portion of the first wireless channel. Furthermore, the cellular communication system In accordance with the system's channel reuse plan, in box 212, a second A line channel is assigned to the telecommunications site 102. This second wireless channel The channel also has incoming and outgoing radio channel portions. Then said received signal at the telecommunications site 102, as shown in box 214. channel shifted from the wireless channel to the second wireless channel. shifted beliefs The gain of the signal is adjusted in box 215 to a predetermined power level. next, At box 216, telecommunications site 102 transfers the shifted signal to a second transmit on the mountain portion of the radio channel. Finally, as shown in box 218 , the shifted signal is transmitted to a second wireless channel at the mobile communication unit 138. , and the process ends at box 220.

Additionally, - by way of example, FIG. A flowchart illustrating how signals preferably proceed to network unit 120 is shown below. -This is a chart. This process is carried out by the mobile communication unit, as shown at 230. The process begins at step 138. In box 232, the first wireless channel is to the central communications site 104 in accordance with the cellular communications system's channel reuse plan. Assigned. The first radio channel has an ingress and an own radio channel portion. . The second wireless channel is selected in box 234 as a channel of the cellular communication system. located substantially remote from the central communications site 104 in accordance with the network reuse plan. Assigned to telecommunications site 102. The second wireless channel is incoming and outgoing. It has a line channel part. The mobile communication unit 138 is shown in box 236. A signal is transmitted by an incoming portion of the second wireless channel so as to transmit a signal. Said far The remote communication site 102 is connected to the second wireless channel, as shown in box 238. The signal is received by the input part. Subsequently, the received signal is sent to box 2. 40, from the second wireless channel to the first wireless channel at the telecommunications site 102. channel is shifted to the wireless channel of The gain of the shifted signal is At step 242, the power is adjusted to a predetermined power level. Next, in box 244' , the telecommunications site 102 transmits the shifted signal on a first wireless channel. Send at the peak. In box 246', the central communication site 104 A signal transmitted by a peak portion of one wireless channel is received.

The received signal is transmitted to the central communications site 104 as shown in box 248. digitally processed. Finally, the processed signal is sent to box 25 0, from the central communications site 104 to the cellular communications network unit 120. , which ends the process as shown in box 252.

Although the invention has been described and illustrated with some specificity, the disclosure of the embodiments is This is done by way of example only, and the configuration and combination of parts and each Many modifications of the steps may depart from the spirit and scope of the claimed invention. It will be understood that this can be done by one of ordinary skill in the art.

FIG. 4-2 Continuation of front page (81) Designated countries EP (AT, BE, CH, DE.

DK, ES, FR, GB, GR, IE, IT, LU, MC, NL, PT, S E), CA, JP, KR (72) Inventor Holman Kenneth B.A. South Chestnut, Arlington Heights, Illinois 60005, United States to

Claims (10)

[Claims] 1. A digital cellular wireless communication system having a remote repeater, the system comprising: (a) A central communications site, (i) transmitting a signal on a first portion of a first wireless channel; a transmitting/receiving means for receiving a signal in a second portion of the channel, the transmitting/receiving means Channels are allocated according to the cellular communication system's channel reuse plan. What is there, (ii) transmitting a signal to a cellular communications network unit and transmitting a signal to the cellular communications network; a communication means for receiving signals from the network unit; and (iii) operably coupled to said transmitting/receiving means and said communication means; a communication means and digitally process a signal received by any of said communication means; and subsequently transmitting the processed signal to one of the transmitting/receiving means and the communicating means. said central communication site comprising processing means for providing to another; (b) a telecommunications site located substantially remotely from said central communications site; So, (i) receiving a signal on the first portion of the first wireless channel; channel shifting the received signal between a second wireless channel; and allocating the received signals according to a channel reuse plan of the cellular communication system; means for transmitting by an output portion of a second wireless channel which is (ii) receiving a signal on an incoming portion of said second wireless channel; channel shifting the received signal between a first wireless channel; means for transmitting a shifted signal on a second portion of the first wireless channel; , the telecommunications site comprising; A digital cellular radio communication system having a remote repeater comprising: 2. moreover, (a) the first portion of the first wireless channel is in front of the first wireless channel; and (b) the second portion of the first wireless channel comprises a recording portion; The communication system according to claim 1, comprising the incoming portion of the first wireless channel. Mu. 3. moreover, (a) the first portion of the first wireless channel is in front of the first wireless channel; and (b) the second portion of the first wireless channel comprises an input portion; The communication system according to claim 1, comprising the outgoing portion of the first wireless channel. Mu. 4. Further, the central communication site and the mobile communication unit may be substantially remote from the central communication site and the mobile communication unit. a mobile communication unit located at a first and a second receiving a signal over an outgoing portion of one of the wireless channels of the first and second wireless channels; on which of the wireless channels the signal was received; and transceiver means for transmitting signals over the determined inlet of the wireless channel; The communication system according to claim 1, comprising: a communication system according to claim 1; 5. Method for providing remote relay of signals in a digital cellular radio communication system And, (a) A central communications site receives a signal from a cellular communications network unit. (b) digitizing the received signal at the central communication site; the stage of processing (c) a first wireless channel according to a channel reuse plan of the cellular communication system; allocating a resource to said central communication site; (d) transmitting the processed signal from the central communication site to the first wireless channel; transmitting by a particular part of the (e) at a telecommunications site located substantially remotely from said central communications site; and receiving a signal transmitted by the specific portion of the first wireless channel. (f) converting a second wireless channel into a channel reuse meter of the cellular communication system; assigning said second wireless channel to said telecommunications site according to a plan; A channel has an inlet and an outlet; (g) from the first radio channel to the second radio at the telecommunications site; channel shifting the received signal to a channel; (h) from said telecommunications site said system by means of an output of said second wireless channel; a digital cellular wireless communication system, comprising: transmitting a received signal; A method for providing remote relay of signals in 6. the first wireless channel has an input portion and an output portion; said particular portion of a wireless channel comprises said outgoing portion of said first wireless channel; , the method according to claim 5. 7. the first wireless channel has an input portion and an output portion; The particular portion of the wireless channel is from the input portion of the first wireless channel. 6. The method according to claim 5. 8. Method for providing remote relay of signals in a digital cellular radio communication system And, (a) a first wireless channel according to a channel reuse plan of the cellular communication system; assigning the information to the central communications site; (b) a second wireless channel according to a channel reuse plan of said cellular communication system; channel to a telecommunications site located essentially remotely from said central communications site. the second wireless channel having an input and an output portion; , (c) at said telecommunications site, said input portion of said second wireless channel; (d) receiving the received signal at the telecommunications site; channel shift from the second wireless channel to the first wireless channel. stages, and (e) transmitting the shifted signal from the telecommunications site to the first wireless channel; (f) at said central communication site, transmitting at said first receiving the transmitted signal over the particular portion of the wireless channel; (g) digitally processing the received signal at the central communication site; and (h) transmitting the processed signal from the central communication site to cellular communication. a digital cellular radio communication system comprising: transmitting to a network unit; A method for providing remote relay of signals in a system. 9. the first wireless channel has an input portion and an output portion; said particular portion of a wireless channel comprises said outgoing portion of said first wireless channel; , the method according to claim 8. 10. the first wireless channel has an input portion and an output portion; The particular portion of the wireless channel is from the input portion of the first wireless channel. 9. The method according to claim 8.