JPH05503616A - Zone microcell with sector scanning for cellular telephone systems - 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] name of invention ZONAL MICRO CELL WITH FAN-SHAPED SCAN FOR CELLULAR TELEPHONE SYSTEM This application is filed under No. U.S. Patent No. 4.932 issued on June 5, 2007 entitled Cellular Telephone System. ．． This is a continuation-in-part application of No. 049.

field of invention The present invention provides a plurality of adjacent transmission frequencies each having a plurality of sets of transmission frequencies assigned thereto. to maintain continuous communication with mobile phones that move between cells. The present invention relates to a cellular telephone system provided with handoff means. In particular, the present invention The present invention relates to a zone microcell with sector scanning function for a ruler telephone system.

Background of the invention A typical cellular power unit, such as a mobile unit that moves along a path between cells, In a communication system, a handoff occurs. The handoff operation is It is controlled by a Mobile Telephone Switching Office (MTSO) which receives instructions from the Mobile Telephone Switching Office (MTSO). Typically, , the signal received from the mobile phone indicates that the mobile phone is at the cell border. A handoff command is generated when the signal strength is less than the specified signal strength. .

Each cell in a cellular telephone system operates on a different assigned transmit frequency . As the mobile phone passes between cells, handoff signals are sent to the cells. , a different frequency than that being transmitted by the cell the mobile phone is passing This command indicates that the device is ready to start transmitting. The mobile phone moves to the next adjacent cell A similar procedure is followed when passing through . The set of allocated frequencies is connected to neighboring cells. and such combinations ensure that the cells are sufficiently close to each other that interference problems do not occur. They are not repeated unless they are far apart.

Typically, a mobile telephone unit includes a control unit yh, a transceiver and an antenna system. Contains the stem. Each cell site typically includes a control unit, radio cabinet, Includes internet, power equipment, data terminals and antennas. MTSO is a cell site and include appropriate processing and switching means.

MTSO is a standard hard-wired telephone system with telephone company zone offices. It will also be broadcast. Communication links between the MSTO and various cell sites typically include: Microwave, T-carrier, or optical fiber between the cell site and the MTSO. Communicate both voice and control data between

When a user in a vehicle energizes the mobile unit's receiver, the receiver assigns a cell. selects multiple set-up channels from among the total assigned channels. scan. Typically, 21 out of a total of 416 channels are set up. It is a tsupu channel. The remaining channels are communication channels. the receiver is If you select a strong setup channel, it will be locked on for a certain amount of time.

Each site is assigned a different setup channel. Therefore, the strongest Locking into cent-up channels usually means selecting cell sites that are close in volume. means. This self-location mechanism is used during the idle phase and It is independent from the user. It is the mobile unit involved in transmission at the cell site. This is a great advantage as it eliminates the burden of searching for knits. Self location The disadvantage of this mechanism is that the location information of idle mobile units is It does not appear at all in Therefore, the standard non-mobile i.e. landline The paging process is longer when there is a call from to the mobile unit. Most of the The use of self-location mechanisms is acceptable because the be done. After some delay (e.g. 1 minute), the self-location procedure is repeated. Ru.

To make a call from a mobile unit, the user must enter the called number on the mobile unit. check that the number is correct and press the “Send” button. Press the button. A request for service is obtained by the self-location mechanism described above. is routed through the selected setup mechanism. cell site receives it , the best directional antenna for voice channels to use at directional cell sites. Select na. At the same time, the cell site sends a request to the MTSO via a high-speed data link. Send. The MTSO selects the appropriate voice channel for the call and link the mobile unit by acting on it through the best directional antenna . The MTSO also connects wireline parties through the telephone company's zone offices.

When you dial the landline party or mobile unit number, your telephone company's landline The local station recognizes that the called number is a mobile unit and accepts the call. to MTSO. The MTSO uses the Behnong message as the mobile unit number. Send to a cell site based on an appropriate search algorithm. Each cell size The client sends the page through its own setup channel. mobile unit The device recognizes its own identity through a strong setup channel and logs into it. and respond to the cell site. The mobile unit uses the assigned audio channel It also sends a command to switch to the current state and generate a user alarm.

When the user of the mobile unit or the transmitter is turned off, a specific signal (signal generation tone) is sent to the cell site, freeing up the audio channel on both sides. The best mobile unit Resume monitoring the page through the set amplifier channel.

During a call, two channels are on the voice channel. mobile unit identified When you leave the coverage area of a cell site, reception becomes weaker. The current cell site is , via a suitable signal on the audio channel, e.g. +00 ms burst. request for off. The system does not interrupt the call or alert the user. Switch a call to a new frequency channel on a new cell site without making a call I can do it.

The call continues as long as the user is on the call. When a handoff occurs, the user I never notice.

When call traffic in a particular area increases, Therefore, by reducing the area covered, capacity can be increased. Ru. For example, a cell can be divided into four smaller cells with half the radius of that cell. If the traffic is divided into two, the traffic increases by a factor of four. Naturally, the cell The smaller the There will be more huntoffs.

In the right circumstances, reducing cell size can be beneficial, but , certain problems may arise. For example, if the cell size is less than 1 mile in radius or Very often the signal strength coverage becomes very poor when reduced by It becomes a rule. This may be caused by buildings or other structures. and therefore will vary greatly depending on the location of the mobile unit. It ends up. Other problems related to signal interference also arise. a cellular phone system In an attempt to improve coverage, several small single cell frequency set, but this allows neighboring cells to have the same frequency or frequency set. or adjacent frequencies cannot be used. Therefore, the total capacity of the system will decrease. This is because the number of channels available in a certain system is This is because the number is proportional to the inverse of the number of different frequency sets used.

Summary of the invention Sector scanning for more uniform signal coverage, lower interference levels and A zoned microcell system is proposed which provides a relatively simple and economical structure. Served. The system includes multiple antenna sets. Each antenna set The points are each appropriately arranged within the periphery of one cell and are located within the vicinity of that cell. so as to effectively limit the transmission and reception of signals to one zone with the boundaries of that cell It has directed transmitting and receiving means. allocated for that cell. received by each antenna set at each frequency in the set of transmitted frequencies The strength of the signal is monitored. The transmit frequency sensor assigned for that cell. For each frequency at each frequency, the transmission selects the strongest signal at each such frequency. Reception is limited to a selected set of antennas within that cell. This results in , transmission on each frequency is limited to the zone associated with that selected antenna set. be done.

In one embodiment of the invention, each of the plurality of antenna sets includes a plurality of antennas. Divided into subsets. Each antenna subset transmits and receives signals from its associated effectively limited to sectors within the boundaries of the zone covered by the set of antennas It has transmitting and receiving means arranged and oriented to. That center each antenna at each frequency in the set of transmit frequencies assigned to the The strength of the signal received by each antenna subset of cents is monitored.

The transmit service frequency for that cell is, in this example, for each such to the selected antenna subcent within the cell with the strongest received signal at the frequency Limited. This allows transmissions on such frequencies to be performed by that selected antenna. limited to sectors related to the subset. No. 1 To prevent rad-off from occurring, Calls on the same frequency are switched from zone to zone within a cell.

Brief description of the drawing FIG. 1 is a schematic diagram showing an embodiment of a microcell structure according to the system of the present invention. Ru.

FIG. 2 is a block diagram showing an electronic system according to an embodiment of the present invention.

FIG. 3 illustrates the present invention in which the cell contains three separate antenna sets. FIG. 3 is a schematic diagram showing another embodiment of the invention.

FIG. 4 shows the electronic system associated with one of the slave subsites in an embodiment of the invention. FIG. 2 is a block diagram showing the system.

FIG. 5 is a schematic diagram showing the signal processing section of one slave site.

Detailed description of the invention FIG. 1 schematically shows a cell 1 constructed according to the invention. outside cell 1 The side boundaries are indicated by solid circles II. Although shown as circles, these Cells are often represented as hexagons in cell designs. however, In practice, due to the terrain, buildings and other structures, the actual The border can be irregularly shaped. Anyway, the solid circle 11 is the mobile telephone unit I would like to express the trajectory of passing from the control of the cell shown in the diagram to the control of the adjacent cell. This is what I did.

Three separate antenna sets 13,! 5 and 17 are placed in cell 11. Ru. Antenna sets 13.15 and 17 are respectively slave subset 1 0.16 and 18. Depending on the specific conditions within the seven four areas It may also be useful to use other numbers of antenna sets, as shown in Figure 1. The use of three sets is for illustration purposes only. Each antenna The sets include transmitting antennas J3a, 15a and 17a, respectively.

Further, each antenna set includes two receiving antennas 13b and 13c, respectively. , 15b and 15c, and +7b and 17c. Each subsite The reason why we installed dual receiving antennas is that by combining the signals, we can This is because of the use of diversity to reduce fading. Furthermore, Anne The tenacet 13 has a control channel for transmitting control signals, as described below. channel transmitting antenna 13d and a dual control channel receiver for receiving control signals. 3e and 13f. The antenna subsite 14 is Referred to as star subsites, antenna subsites 10116 and 18 are This site is called a web subsite. In the particular embodiment shown in FIG. 13 is located at the master sub site [4, but this antenna set 13 is , may be located elsewhere as desired within cell 1, depending on the particular environment. be. The location of subsites and the number of subsites in a cell are rlEEEE Transactions on Vehicle Technology , February 1988, and determined by an effective range prediction model. sell.

Each antenna set has its own main power zone for transmitting and receiving signals Ru. Therefore, the slave subsite 10 that coexists with the subsite 14 Tenaset 13 has a zone indicated by a broken line 13z. Similarly, the slave server The antenna set 15 at the bus site 16 has a zone of influence indicated by a dashed line 15z, The antenna set 17 at the slave subsite 18 is located in the power zone indicated by the dashed line 17z. It has a It can be seen from FIG. 1 that the zones overlap in certain areas.

The zone of influence (i.e. the signal transmission and reception zone) is substantially the boundary of the cell Directivity is given to the antenna set so that it is limited within. this orientation For example, the encoding means 19 disposed at each antenna set or subsite provided by any suitable means as indicated. The directivity means 19 has a desired directivity. & glue flap for independent antenna or other suitable equipment to provide coverage It can be done. However, control channel antennas 13d, 13e and 13 f is provided to have a larger zone of force. This is the dashed line 21 and almost coincides with the limit of cell l shown in circle 11. It is extending.

FIG. 2 is a schematic block diagram of an electronic device according to an embodiment of the present invention.

Three slave subsites 1o, 16.18 connect to master subsite 14 and is controlled by this. In this example, slave subsite 1o is 3 connected to the master subsite 14 via two cables 43, 51 and 59. There is. The slave subsite 16 is connected via three cables 23, 25 and 27. It is connected to the master subsite 14. Slave subsite 18 has three Connected to master subsite 14 via cables 29, 31 and 33 . In particular, cable 43 is connected to converter 82 and cable 29 is connected to The cable 23 is connected to the converter 83, and the cable 23 is connected to the converter 84. The cable 51 is connected to the converter 85, and the cable 3I is connected to the converter 85. The cable 25 is connected to the converter 86 and the cable 25 is connected to the converter 87. The cable 59 is connected to the converter 88, and the cable 33 is connected to the converter 88. The cable 27 is connected to the converter 9o. .

Generally, cables 43, 23 and 29 carry transmitting antenna signals while Bulls 51, 59, 25, 27, 31 and 33 send receiving antenna signals. Ko A converter is a form of communication used between a slave subsite and a master subsite. It is possible to perform up modulation and down modulation in frequency by the formula .

In this example, communication between the slave and master subsites is via cables. It is depicted as something that takes place. For example, if such a cable is It will be obvious to those skilled in the art that carrier cables, optical fibers, etc. be. For example, open converter vs. slave subsite and master subsite The converter operation is (1) modulating from 800 MHz to microwave, then modulating at 800 MHz. By lowering the frequency to MHz, (2) modulating from 800MHz to light waves, and then (3) From 800MHz to 14MHz Perform modulation down to the reference band, then modulate up to 800MHz. It can be done by If one slave subsite coexists with the master subsite If so, the converter may be omitted.

Each slave subsite has a signal processing answer for the slave subsite IO. A sample 35 is provided. For simplification, Figure 2 does not contain such information. Although the exact unsample is not shown, the nearly identical signal processing unsample is Please note that is located at slave subsite 16.18. signal processing The antenna sample 35 is a frame disposed between the antenna 13a and the cable output 43. It includes a filter 37, an amplifier 39, and a converter 41. Similarly, filter 4 5. An amplifier 47 and a converter 49 are connected between the antenna 13b and the output cable 51. A filter 53, an amplifier 55 and a converter 57 are connected to the antenna +3c and the output is provided between the cables 59. Filters, amplifiers and converters required It filters, amplifies, and modulates the signal according to the It can be in any format as long as it serves the purpose.

At master subsite 14, all cable connections 23.25.27.29 ．． 31.33.43.51 and 59 are zone exchanged via converters 82-90 It is connected to a switch, that is, a zone switch 61. Also, output cable 2 5.3I and 5I are connected to the scanning receiver via connection terminals 65, 67 and 69 respectively. 63. The scanning receiver 63 of the master subsite 14 All subsites choreographed to a specific set assigned to 10.16, I8 and scan all frequency channels. The scanning receiver 63 then scans each frequency. Select the strongest signal level among all subsites for the channel.

A zone exchange device or zone switch 61 assigns each zone to a desired subsite. Link the transmit signal to the wave number and disconnect the old transmitter. The received signal is also the same new You can switch to another subsite.

Unlike subsite antennas, control channel signal antennas cover the entire cell and is used to set up the call in a manner known to those skilled in the art. mobile phone Details about such procedures in general as well as the system can be found in the Mobile Cell Phone Telegraph System, Author William C.V. Lee , ? Described in McGraw-Hi II, 1989 ing.

Scanning receiver 63 provides output control signals to zone switch 61 via appropriate connector 71. send the number. The zone switch 61 should be able to switch between each subsite. For example, any structure can be used, and this switching depends on the strength of the signal received at the subsite. (this intensity is determined by the scanning receiver 63). master sa The bus site 14 has a carrier frequency monologue 73, 75.77. Moji Module 73 is assigned to the transmitter and module 75.77 is assigned to the receiver. assigned. Each module has an assigned set of carrier frequencies. Give it to the cell. For example, some of the 395 voice channels and 21 control channels One of the channels is assigned to each cell.

The signals sent from the antennas received by modules 75 and 77 are combined. , is sent to the controller 79. The controller 79 sends signals to the transmitter module 73. send the number. Also, the controller 79 determines which cable is connected and which voice is received. Decide whether to send the signal to the MTSO. The controller 79 is connected by suitable connection means. Connected to NO SO. Furthermore, the controller 79 has three control anti+ Transceiver-8 for transmitting and receiving signals on I3d, 13e, +3f It is connected to I.

Controller 79 measures the signal strength of the channel requested by the MTSO. . If the first call is in a particular cell or if the first call is in a controller 79 to that particular cell via the MTSO controller 79. start transmitting for that call on the specific frequency assigned to it. assigned The frequency determined by the controller 79 is the frequency with the lowest noise level. It is. During a call, the signal strength received from all antenna sets reaches a predetermined level. controller 79 initiates the handoff process from the MTSO Start.

In operation, a mobile unit operating within a cell on an assigned frequency f, The knit moves within its cell. All subsites within that cell are voice level, but does not necessarily receive voice signals from the mobile unit. . Only the subsite with the strongest received signal level sends and receives signals to the mobile unit. and start the call. The mobile unit determines which other subsite receives the strongest signal. If the transmitter moves to a weaker subsite, the system Switch off and switch the transmitter at the subsite with the strongest signal. Chion. A bidirectional receiver antenna also attaches to the appropriate subsite to receive the call. is switched to However, the frequency does not change and remains f.

Therefore, no handoff occurs in the normal sense and the MTSO is not involved. this , no new hunt-off load is added to the MTSO switch equipment. all The signal strength received by the subsite from the mobile unit is below a predetermined level. If this happens, a handoff from the master subsite to the MTSO is required. Become.

The advantage obtained by the cells according to the invention is that each cell has a single antenna size. The uniformity of coverage can be significantly improved compared to cells that only use It is. This is especially true for small cells, i.e. cells with a radius of one mile or less. It is beneficial for Reducing the effective radiation area covered by each subsite As a result, the effective radiation radius for each frequency becomes smaller, resulting in a lower interference level. This results in a decrease in All of these require handoff (the cell itself This is done inside the . Active subsites within a cell can be from one to the other, but the frequency on which the transmission is taking place does not change within the cell . This is done in a relatively simple and economical manner, which reduces the size of the cell. The radius can be as small as 500-1000 feet.

FIG. 3 represents another embodiment of the invention. In this example, the same as in FIG. , the cell has three separate antenna sets 113, 115, 117. . The outer periphery of the cell is indicated by a solid circle Ill. As mentioned in the embodiment of FIG. In addition, the cells may actually be distorted in shape. Solid line 111 is a mobile telephone unit. represents the boundary when a cell moves from being under the influence of the illustrated cell to being under the influence of an adjacent cell. vinegar.

In this example, antenna set 113 is located at master subsite 114. antenna sets 115 and 117 are located at subsites 116 and 118, respectively. ing. The master subsite 114 can be configured to any desired one of the slave subsites. It is also possible to locate. The number of antenna sets can be any number, as shown in Figure 3. The three in the table are merely exemplary.

The implementation of Figure 1, where each antenna has one transmitting antenna and two receiving antennas. Unlike the embodiment, each antenna set 113, 115, 117 includes multiple antenna sets. each sub-site, in the embodiment of FIG. They form three subsets. Each antenna subset has its own transmit antenna. Tenas 113a, 113a', 113a', 115a, l15a', 115a' and 1I7a, l17a', and l17a'. Each antenna set also Two receiving antennas ll3b, 113b'-113b', 113c, ll3c' , ll3c', 115b, 115b', 115b', 115c, l15c', 1 15c', ll7b, 117b', 117b', 117c, 117c', 117 c' respectively. Using two receiving antennas in each subset is This is to reduce fading of signals due to signal combination. sa the location of the cell, the number of subsites within the cell, and the number of antenna subsites at each subsite. The number of cuts is based on the rlEEE Transaction issued in February 1988. s on Vehicle Technology” Noriichi Range Prediction (L ee coverage prediction) Wear.

Cell III is a first cell that transmits and receives signals to an appropriate controller (not shown). As explained in the antenna set 13 in the figure, for transmitting and receiving control signals. including an antenna set (not shown). As in the case of FIG. The channel antenna has approximately the same range as the cell III limit, as shown by the dashed line 121. is formed with a zone of influence surrounding the area.

As in the embodiment of FIG. Has a zone of influence. However, unlike the embodiment shown in FIG. 1, each part of the embodiment shown in FIG. The antenna set is subdivided into sectors whose main zone of influence is effectively separated. It is. Hence, the subsite! The impact zones related to 14 are three sectors. It consists of 113x, 1133', and JI3z. Sector 113x is an 11.3a, 11.3b, ]13c.

Sector 113y is a subset of antennas 1.13a', ]13b', 113 c', sector 1132 is a subset of antennas ll3 a', 1]3b', ll3c'. Other subsites of Figure 3 116 and +18 are sectors of similar sign to those of subsite +14. It is made up of.

From Figure 3, it can be seen that the antenna subsites are offset inward from the periphery of Cell III. It is clear that the sectors overlap in some areas. Ann, A subset of tenas has sectors related to that subset, i.e. the signal transmission and the zone of reception is substantially within the boundaries of the zone of operation by that particular subsite. Directivity is given a certain limit. Furthermore, as in the case of Fig. These sectors are substantially confined within the boundaries of cell Ill. Each antenna set In other words, an appropriate sign (symbol) means placed on the subsite as shown in +19 Directivity is given by means. As shown in FIG. 3, the directivity means 119 Each subsite that divides each sector into 120 degree sections constitutes a reflector.

However, any other device that provides the desired directivity and range, including omnidirectional antennas It should be understood that also may be used within the spirit and scope of the invention. Of course, each antenna The strength of the signal transmitted at the subsite is also appropriate to cover the desired sector. can be adjusted to

FIG. 4 shows a block diagram of the electronic circuitry associated with one of the slave subsites 117 of FIG. This is a diagram. The slave subsite 117 shown in FIG. is connected to the system of the present invention in substantially the same way as the bus subsite 18. This point For clarity, leads 29, 31, and 33 are designated in FIG.

Lead (cable) 29 carries the transmitter antenna signal and is connected to other leads (cables). cable) 31.33 carries the receiver antenna signal. Master subsite location In addition to the elements shown in Figure 4, other elements explained in Figure 2 may be incorporated. I hope you understand that.

The three subsets of antenna sets are designated with the same numbers as in FIG.

Each antenna subset serves multiple sector subsites 134.135.136. connected to one. Each sector subsite has It has a signal processing section that is substantially the same as the signal processing section 35. This point is the slave subsite 5 for illustration of 136. Filter 181 and amplifier 191 Connected between antenna 117a' and cable +43, filter 182 and amplification 192 is connected between the antenna ll7b'' and the cable 151, and Router +83 and amplifier 193 are connected between antenna ll7c' and cable 159 has been done. Returning to FIG. 4, the appropriate cable connections 123, 125,! 27, +29.131.133.143.151159 for each sector subsite and 3 It is connected to a sector switch 161 with ×3 ports. Furthermore, cable 1 25. Receiver signals via 13+ and 151 connect to connections 165, +67 and and 169 to scanning receiver 163 . The scanning receiver 163 outputs The signal is sent to the sector switch 16 via a suitable connection 171. sexy switch 161 between sector subsites 134, 135 and 136; Depends on the signal strength being received at the subsite determined by Scan Reception 1i1163 Any suitable configuration for switching can be used.

Therefore, the present invention provides signal strength at each frequency in the set assigned to a cell. Two discrimination levels are provided for each degree. Signal strength discrimination for each antenna subsite occurs at a subsite and determines which subsite of the antenna at that subsite is activated. . Discrimination between subsites to determine which subsites are activated at the same time There is also. Therefore, only the sector of the cell that is receiving the strongest signal is the one that the mobile unit send and receive signals to and form calls. If the mobile unit is not transmitting The system of the present invention system turns off the transmitter associated with the weaker sector and increases the maximum strength signal level. It operates to turn on the transmitter associated with the receiving sector. Its characteristics Two diversity receiver antennas associated with a given sector also Swift to receive. In some situations, the reception in each sector The transmitter does not necessarily have to be turned off. However, the frequency is be the same throughout the entire file. Therefore, handoffs do not occur as they traditionally do. However, MTSO is not included. Also, as a result of the above cell repartition, the MTSO switch There is also no handoff load applied to the switching device.

According to the invention, the cell can be divided into subsite zones and further into subset sectors. system that utilizes only a single antenna site in each cell. An important improvement is made in the uniformity of the effective viewing area on the system. This is a small It is particularly useful in large cells, ie, cells with a radius of one mile or less.

Because it is powered by individual subsites of individual zones and sectors Effective radiation for individual frequencies by reducing the effective radiation area This is because the radius is reduced and the disturbance level is also continuously reduced. This is all about cell This is done without the need for handoff within the network. Frequency at which the transfer occurs does not change in the cell, but operating subsites within the cell do not change the signal level. switch from one to the other according to the rules. This is a relatively easy and economical method , which reduces the size of the cell to a radius of 500 to 1000 feet. It is possible to reduce the number of items that are placed.

Based on the above description and accompanying drawings, those skilled in the art will be able to make various further modifications to the present invention. You will be able to do that. We believe that such variations are within the scope of the claims of this application. Ru.

! − JyoIF (no change in content) FIG. 2 (No change in IFC contents) Procedural amendment (formality) 5.2.22 Heisei Year Month Day

Claims (20)

[Claims] 1. Different sets of assigned transmit frequencies in cellular telephone systems Neighboring cells with One cell has multiple antenna sets, and each antenna The nasset is located and has a substantially signal-free zone within the boundaries of said cell. having directional transmitting and receiving means to limit propagation and reception and assigned to said cell; received by each of said antenna sets at each frequency of the transmitted transmit frequency set. control means including means for monitoring signal strength assigned to said cell; For each frequency in the transmit frequency set, select the signal before having the strongest received signal at each frequency. means for restricting transmission to a selected set of antennas of the selected cell; specific for limiting transmissions on frequencies to zones related to the selected antenna set. cell to be marked. 2. The monitoring means monitors each of the access points for each frequency of the assigned frequency set. having frequency scanning receiver means for determining the strength of the signal at the antenna means; A cell according to claim 1. 3. The control means controls all of the antenna sets determined by the monitoring means. emits a handoff signal when the signal strength is below a predetermined level. 3. A cell according to claim 2, comprising means for generating a cell. 4. A cell according to claim 1, wherein the number of antenna sets is at least two. 5. The control means receives a control signal from an antenna located in one of the antenna sets. means for setting up a cell, the control signal antenna being connected to the cell. from another of said antenna sets to a mobile phone and in said cell. shaped to limit the propagation and reception of signals from the telephone to the rest of said antenna set; The cell according to claim 1, wherein the cell comprises: 6. Each of said antenna sets consists of one transmitting antenna and two receiving antennas. The cell according to claim 1. 7. Each of the plurality of antenna sets is divided into a plurality of subsets, and each of the plurality of antenna sets is divided into a plurality of subsets. Each subset is placed at an appropriate location and served by an associated set of antennas. to substantially limit signal propagation and reception to sectors within the boundaries of the serviced zone. and a transmitting/receiving means having directivity, wherein the control means is each of said antennas at each frequency of a set of assigned transmission frequencies to said cell; means for monitoring signal strength received by each said subset of the set; and the limiting means, at each frequency of the set of allocated frequencies of the cell, a selected antenna subset of said cell with the strongest received signal at each frequency; transmits on a selected subset of antennas. 2. A cell according to claim 1, restricting transmissions on this frequency to concerned sectors. 8. The plurality of antenna sets are located substantially away from the cell boundary. 8. The cell according to claim 7, wherein: 9. A cellular telephone system having a plurality of adjacent cells, wherein each of said cells each cell has a different set of allocated transmission frequencies, and the cells move from cell to cell. hand-off means for continuous communication with a mobile telephone, at least the above-mentioned One of the cells has multiple antenna sets, each antenna set has a fixed position. and substantially limit signal propagation and reception to zones within the boundaries of said cell. The transmitting/receiving means has directivity in order to monitor the signal strength received by each of said antenna sets at each frequency of said sets; a control means comprising means for controlling a transmission frequency set assigned to said cell; At each frequency, the selected cell with the strongest received signal at each frequency means for restricting transmission to the antenna set, whereby the selected antenna set A system characterized by limiting transmission by frequencies to zones related to the network. 10. The monitoring means is configured to monitor each frequency for each frequency of the assigned frequency set. having frequency scanning receiver means for determining the strength of the signal at the antenna means; 10. The system according to claim 9. 11. The control means controls all of the antenna sets determined by the monitoring means. transmits a handoff signal when the signal strength is below a predetermined level. 11. The system of claim 10, comprising means for generating. 12. The system according to claim 9, wherein the number of antenna sets is at least two. Mu. 13. The control means may be a control signal antenna located in one of the antenna sets. means for setting up a cell, the control signal antenna being connected to the cell; from another of said antenna sets in said cell to a mobile phone; to limit the propagation and reception of signals from the mobile phone to the rest of the antenna set. 10. The system of claim 9, wherein the system is formed. 14. Each of said antenna sets includes one transmitting antenna and two receiving antennas. 10. The system of claim 9, comprising: 15. Each of the plurality of sets of antennas is located at a separate partial location, and each of the plurality of sets of antennas 10. The control means and the restriction means are located at a single partial position. system. 16. 16. The system of claim 15 including cable means interconnecting the partial locations. 17. It is determined that said control means is not used by said scanning receiver means. one of said frequencies having the lowest interference level is known to said switch mechanism. 11. The system according to claim 10. 18. Each of the plurality of sets of antennas is divided into a plurality of sub-sets, and each part is divided into a plurality of sub-sets. A subgroup transmits signals to sectors within the boundaries of the area received by the associated set of antennas. transmitting and receiving means oriented to substantially limit the propagation and reception of signals; and the control means is configured to control a specified set of transmission frequencies for the cell. by each of said subsets of each of said antenna sets at each frequency of means for monitoring the strength of the received signal, the regulating means controlling the transmission; , each corresponding frequency at each frequency in a specified set of transmission frequencies for said cell. to the selected subset of antennas within said cell that have the strongest received signal at the frequency , thereby transmitting only the antennas associated with the selected subset of antennas. 11. The system of claim 10, wherein transmission is restricted to Kuta on that frequency. 19. Each of the plurality of antenna sets is located at a considerable distance from the cell boundary. 20. The system of claim 18, wherein the system is installed in a. 20. A series of cells with different combinations of transmit frequencies. Provide a handoff method to maintain communication with car phones as they move from cell to cell. one cell has a plurality of sets of antennas, and each of the sectors has a plurality of sets of antennas. Each set of antennas occupies a predetermined portion of a cell, with each set of antennas occupying a separate in a manner that substantially limits the propagation and reception of signals within the corresponding sectors of the number of consecutive sectors. transmitting and receiving means configured to be oriented to, each associated with a corresponding one of said sector; and each pair at each frequency within a specified set of transmit frequencies for said cell. for monitoring the strength of the signal received by said receiving means in the corresponding sector; a plurality of scanning means and each frequency within a specified set of transmission frequencies for said cell; The set of antennas in said cell that have the strongest received signal at each frequency in question, in number. the transmitting mobile phone has a means for limiting transmissions to A predetermined frequency only within a substantially sector of one area of said cell within a location A cellular telephone system in which transmissions occur.