JP2002152108A - Method and device for mobile communication - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable high-speed down transmission by controlling a base station transmitting pattern with a little up information from a mobile station. SOLUTION: In each of base stations BS1, BS2 and BS3, the thin multibeam of beam width for about several frequency, for example, is radiated, a base station number BSi thereof and a beam number #j are added to the transmitting information of each of beams, the mobile station detects a receiving level for each of beams from the respective base stations, prepares a level table LT2, in which beam numbers are located in order from the highest receiving level of >= threshold SL, for each base station and transmits it to the correspondent base station and in each of base stations, the interference degree of respective beams in the present station is obtained from the level table from each of mobile stations. Then, the beam number of the least quantity of interference of >= SL is assigned to each of mobile stations and the beam number and an interference number Iv are transmitted to the mobile station. While using the beam number received from each of base stations and the beam of a little Iv in the Iv, the mobile station performs communication with that base station.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mobile communication method and apparatus for forming a multi-beam radiation pattern in a base station, using the beam for communication with different mobile stations, and adaptively changing the used beam. It is.

[0002]

2. Description of the Related Art FIG. 13 shows a conventional mobile communication system for performing communication by changing the radiation pattern shape with time. Here, base stations BS1, BS2, and BS3 are present, and mobile station MS1 is communicating with base station BS1, and mobile station MS2 is communicating with base station BS2. This is a case in which an adaptive antenna is used to change the shape of a radio wave radiation pattern over time during signal transmission (downlink transmission) from a base station to a mobile station. The transmission pattern PB1 of the antenna of the base station BS1 points the maximum level to the mobile station MS1 in a communication state, and points the null or low level so as not to interfere with the other mobile station MS2. The transmission pattern PB2 of the antenna of the base station BS2 has a similar relationship to the mobile station MS2. On the other hand, in the downlink transmission, the reception pattern PM1 of the mobile station MS1 has the maximum level of the radio wave from each of the base stations BS1 to BS3 directed to the arrival direction of the radio wave of the base station BS1 in the communication state, and the other base stations BS2 A null or low level is directed to the radio wave from BS3.

In this case, in order to create an optimum transmission pattern of the base station and an optimum reception pattern of the mobile station, the base station BS1
(BS2) is in the communication state of all the surroundings or receiving level information or S of mobile stations MS1 and MS2 trying to enter communication.
It is necessary to know the IR (signal to interference ratio).

[0004]

Therefore, it is necessary for the base station to obtain an enormous amount of information from the mobile station every moment, so that the control becomes enormous and the transmission capacity of the original information transmission is limited. And the need for a separate channel for control signals arises. As a result, even though an adaptive antenna is introduced, the frequency cannot be effectively used. SUMMARY OF THE INVENTION It is an object of the present invention to provide a mobile station using an adaptive antenna, which has a small amount of uplink transmission information from a mobile station to a base station and can form an appropriate base station transmission pattern and can perform high-speed downlink transmission from the base station to the mobile station. It is an object of the present invention to provide a communication method and an apparatus therefor.

[0005]

According to one embodiment of the present invention, a base station forms a multi-beam radiation pattern;
For each of the beams, the beam identification signal is included in the transmission information, and the mobile station displays a signal quality table in which the received beam identification signals are arranged in descending order of the signal quality at the time of receiving the beam. Each base station allocates a beam to be used for communication for each mobile station based on the signal quality table received from each mobile station, and transmits an identification signal to the mobile station. A base station used for communication is determined from the allocated beam, and communication is performed with the base station using the allocated beam.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The outline of an embodiment of the present invention will be described with reference to FIG. The base stations BS1, BS2, and BS3 each form a multi-beam radiation pattern MBP using a multi-beam antenna, and enable different communication for each beam. In this example, each multi-beam radiation pattern (hereinafter simply referred to as multi-beam) MBP forms N beams with beam amounts # 1 to #N. A mobile station communicates with a nearby base station using a beam pointing in the direction of the mobile station. Therefore, since the degree of freedom in controlling the radiation pattern at the base station is limited, the information from the mobile station required for the radiation pattern control at the base station for downlink transmission from the base station to the mobile station is very small. Less is needed. Conventionally, a radiation pattern control operation that directs the pattern maximum value in the exact direction of the desired mobile station and directs null to other interference-producing mobile stations is required, so that it is not necessary to specify a large number of parameters in the control operation. It was necessary to transmit a huge amount of information from all the mobile stations in the vicinity to the base station. However, according to this multi-beam communication for each beam, N
From the individual beams, it is only necessary to select the beam in the direction closest to the direction of the mobile station that is communicating, or to combine the two beams in the direction close to the direction of the mobile station. If there is a larger interfering mobile station, it is only necessary to stop emitting the beam in that direction. From this, it is only necessary to obtain information on only the mobile stations that are performing or performing communication or information on several or less interfering mobile stations, and it is possible to control the base station transmission pattern with only a very small amount of information on mobile stations. .

FIG. 2 shows how the radiation pattern is formed in this case.
It was shown to. Here, (a) controls the conventional peak and null, and (b) controls (switches) only the peak with the multi-beam antenna used in the present invention. As described above, in (a), the desired mobile station MS and the interfering mobile stations I ₁ , I ₂ , and I ₃ are identified, the peak is directed in the direction of the mobile station MS, and the interfering mobile stations I ₁ , I ₂ , and I _{3 are set.} Turn the null in each direction. On the other hand, in (b) of the multi-beam, only the beam directed to the desired mobile station MS is selected, and the respective directions of the interfering mobile stations I ₁ , I ₂ and I ₃ are not specified. It is necessary to make a very sharp beam and keep the side lobe low so as not to emit extra radiation except in the beam direction. This can be realized relatively easily in a mobile communication system using a high frequency band such as a microwave expected in the future. This will be described below.

[0008] The relationship between the size of the antenna and the beam width is expressed by the following equation. FIG. 3A shows the result. G = 4π · Ae / λ ² where G is the antenna gain, Ae is the effective aperture area of the antenna, and λ is the wavelength. The relationship between the gain and the beam width is expressed as follows. _{G = 4π / (θ HP ·} φ HP) ≒ 41000 / (θ ° _HP · _φ
゜_HP ) Here, θ _HP and φ _HP are the half-value angles (radians) of the respective beams in the vertical plane and the horizontal plane, and θ ゜_HP and φ ゜_HP are in units of angles. The side of the horizontal axis in FIG. 3A and the lengths W and H (x) are aperture antennas with an efficiency of 100%.
As shown in (b), H and W represent the opening area H × W, and the element gain is 0 dBi and the feed loss is 0 d in the array antenna.
In the case of B, H and W represent the array area H × W as shown in FIG.

As apparent from FIG. 3A, it is understood that the beam width decreases as the size of the antenna increases. FIG. 3A shows a value not including the antenna efficiency, that is, a value when the antenna efficiency is 100%. Here, when the beam width is about several tens degrees (30 to 120 degrees), the length of one side of the antenna is 1 even if the antenna efficiency is considerably low.
The wavelength may be about 0 wavelength, and about 30 wavelength of the current mobile communication system.
cm, it can be realized with a 3 × 3 m antenna. In this case, since the beam width is too wide, even if the multi-beam conversion according to the present invention is performed, not only the desired mobile station direction but also a wide area is illuminated. Not very effective. On the other hand, in order to obtain a high effect in the present invention, the width of one beam of the multi-beam needs to be several degrees. Therefore,
When the beam width is set to about several degrees, the length of one side of the antenna becomes about several tens of wavelengths, which is a large antenna in the current mobile communication system. However, higher frequencies may be allocated to mobile communication systems in the future, and 10 GHz
In the case of the z system, the antenna size is almost the same as that of the current system. In this case, the gain is very high because the beam width is several degrees, and strong radiation can be performed to a desired mobile station. In addition, since almost all energy is concentrated on the beam, the energy is basically already provided except for the beam direction. As a result, the side lobe can be kept low. Therefore, a mobile communication system using a high frequency band such as a microwave expected in the future can be realized relatively easily and without increasing the size of the antenna.

Therefore, in this embodiment, a multi-beam antenna having a beam width of about several degrees is used as a base station antenna.
Moreover, even if there is little upstream transmission information from the mobile station to the base station, an appropriate base station beam is obtained, and high-speed downlink information transmission from the base station to the mobile station is enabled. Further, the present invention has a further higher effect since the antenna can be pushed to the size of the current system in the mobile communication system using the microwave band expected in the future.

A specific example of uplink transmission information from the mobile station to the base station required for appropriate control of the multi-beam and an example of a method of determining a base station beam used for communication will be described below. That is, this example shows that the pattern control of the entire mobile communication system including a plurality of mobile stations and a plurality of base stations can be performed by transmitting the information in the simple table from the mobile station to the base station. Also, in this example, a conventional adaptive antenna capable of forming an arbitrary pattern is used for a mobile station. As shown in FIG. 4, each of the base stations BS1, BS2, and BS3 is provided with a multi-beam antenna, and can form beams # 1 to #N, respectively. This number of beams may vary from base station to base station. Mobile station MS
1 and MS2 each have an adaptive antenna. From each beam of each base station BS1 to BS3, for example, FIG.
, The transmitted base station number BSi (i =
,...) And information indicating the number of the beam of the base station, that is, a signal in which a header is assigned as a pilot signal with beam number #j (j = 1, 2,..., N) is transmitted. . Each of the mobile stations MS1 and MS2 creates a signal quality table shown in FIG. 6, for example, and transmits the table from the mobile station. This embodiment is an example in which the signal quality table is created using the level of the reception level as a measure, and is therefore called a level table.
When the mobile station creates this level table, it cancels the adaptive operation and sets the antenna radiation pattern to a radiation pattern as close as possible to non-directionality. The level table created by the mobile station is arranged for each base station BS1, BS2,... In order of the intensity of the reception level of each beam, and the limit point of the desired signal transmission, that is, the SL (threshold level threshold). Points are specified. In the example of FIG. 6, the reception levels are higher in the order of beam numbers # 3, # 2, # 10,... From the base station number BS1, which is a level table created by the mobile station MS1, and up to #X is SL or higher. Similarly, for the other base stations BS2, BS3,..., A level table in which the beam numbers are arranged in descending order of the reception level is created.

In this example, all mobile stations make such a table for all receivable base stations and all beams. Each mobile station obtains an average reception level of all the beams for each base station BSi in the level table, and obtains a level table LTk (k = 1, k) for the upper m base stations having a higher average reception level.
,...) To each of the m base stations. Here, m is a parameter, which is determined by a system design value or the environment of a base station or a mobile station. The criterion for selecting m is to transmit all the signals to base stations in which interference is considered to be a problem in the radio waves of the own mobile station.

Each base station BSi receives each mobile station MSk
Is processed as follows.
That is, a level table in the base station as shown in FIG. 7A and an interference table as shown in FIG. 7B are created. That is, the level table of the base station BSi is
It is an array of each level table in which the beam numbers of the own station transmitted from S1, MS2,... Are arranged in order of the reception level.
In FIG. 7A, a blank indicates that there is a received beam only by not entering a beam number, but "-" indicates that the beam could not be received. Therefore, those from the mobile station MS1 in the level table of the base station BS1 correspond to those in the level table shown in FIG.
Same as for 1. Further, for example, the interference amount Iv of the beam #X is defined as follows. That beam #X is received at the mobile station _{MS1, MS4, MS n, MS} n + 2, the distance between the table between #X and the SL (threshold level) in each, the mobile station MS1 #
Since X is the fourth and SL is the fourth, the distance between them is P _x1 = 4-4 = 0, and #X is 3 in the mobile station MS4.
And SL is the fifth, so the distance P _x4 = 5 between them
-3 = 2, and P _xn = 5-4 for the mobile station MSn.
= 1, and P _{xn + 2} = 4-2 = 2 for the mobile station MS _{n + 2} .
The value 5 (= P _x1 + P _x4 + P _xn +
P _{xn + 2} = 0 + 2 + 1 + 2) is the interference amount Iv of the beam #X.

Each of beams # 1 to #N at base station BS1
Then, the interference amount Iv is obtained to create an interference table shown in FIG. Next, a method of allocating beams to mobile stations will be described. For example, in order to determine a beam for the mobile station MS1, SL (threshold level) in the level table of the mobile station MS1 in the level table of FIG.
Among the above beams, a beam having the least amount of interference Iv viewed from the interference table of FIG. 7B is selected. In this example, M
# 3, # 2, # 1, #X in the level table from S1
Are beams of SL (threshold level) or higher, and the interference amounts of these beams are obtained from the interference table of FIG.
5 Therefore, among these, the beam with the least amount of interference Iv is # 2, so the beam of # 2 is assigned to the mobile station MS.
Assigned to communication with 1. This operation is performed for all mobile stations. Each mobile station is assigned an assigned beam number and its interference amount I.
v is transmitted as a beam designation signal.

The mobile station determines a base station for communication based on information on the allocated beams received from each of the m base stations and the amount of interference Iv. Here, communication is performed with the base station having the smallest interference amount Iv of the assigned beam specified by each base station. However, when handover is performed according to the system design method,
That is, when the reception levels from the two base stations are approaching near the SL (threshold level), communication with the two base stations may be performed at the same time. In this way, the base station to communicate with and the beam are determined. Then, the mobile station side adaptive antenna operates for this beam,
An optimal mobile station pattern is determined.

The above operation flow is shown in FIG.
FIG. 9 shows the base station side. That is, each mobile station receives a control channel from the base station and is in a standby state (S1), and when communication starts (S1).
2) Initialize the antenna pattern, that is, make it omnidirectional (S3), and receive each beam of each of the surrounding base stations (S3).
4), create a level table for each base station (S
5) The average reception level of all beams for each base station is calculated (S6), and the level table of the m stations with the highest average level is transmitted (S7). Upon receiving an allocated beam and its interference amount, that is, a beam designation signal from each of the m base stations (S8), a base station having the least amount of interference in these beam designation signals is determined, and the allocated beam of the base station is determined. For communication (S9), the SI of the received signal for that base station beam
The adaptive algorithm is operated so that NR (signal-to-interference ratio) is maximized (S10), and an antenna pattern is shaped (S11) according to the operation, and communication is performed. If the communication is not completed (S12), the flow returns to step S4 to repeat the same processing to check whether the pattern formed by the mobile station is appropriate, and to always check the beam of the preferred base station even if the mobile station moves. The selection and the reception pattern of the mobile station are determined and updated. Although not shown, if the communication level is significantly reduced during communication, the process may return to step S3 to determine a preferable base station and its beam. When the communication is completed (S12), the process returns to step S1.

As shown in FIG. 9, when each base station receives a level table from a mobile station that has made a communication request, it stores it in the base station level table storage unit (s).
1) Create an interference table using the stored base station level table (s2), and refer to the level table and the interference table received from the mobile station that has made the communication request, and assign an assigned beam number to the mobile station. Is determined (s
3) A beam indication signal of the base station number and the assigned beam number is transmitted to the requesting mobile station (s4).

FIG. 10 shows an example of the configuration of a device in a base station. An array antenna including a plurality of antenna elements 21 is provided. Each antenna element 21 includes a receiving unit 23 including a low noise amplifier and a down converter via a circulator 22, and a transmitting unit 24 including an up converter and a power amplifier. Each is connected. The output of each receiving unit 23 is converted into a digital signal by an AD converter 25 and supplied to N receiving adaptive pattern control devices 26. The output of the N receiving adaptive pattern control devices 26 is n signal processing control devices. And is selectively supplied to any of the conversion units 27 via the switching unit 28. The decoded signals of each channel from the n signal processing control decoding units 27 are output to output terminals 29, respectively.

On the other hand, the signals to be transmitted from the input terminals 31 of each of the n channels are respectively encoded by the n signal processing control encoders 32 and converted into intermediate frequency signals.
The output of the N transmission adaptive pattern control devices 34 is selectively supplied to any of the N transmission adaptive pattern control devices 34 by the switching unit 33.
The signal is converted into an analog signal by the converter 35 and supplied to all the transmission units 24. Each adaptive pattern control device 2
Reference numerals 6 and 34 denote each one of the N beams of the multi-beam.
And forming a corresponding beam pattern. The number n of the signal processing control decoder 27 and the signal processing control encoder 32 is equal to the number of channels accommodated by the base station, and is equal to or less than N.

According to the embodiment of the present invention, the level tables from the peripheral mobile stations received and decoded by the n signal processing control decoding sections 27 are stored in the level table storage section 41. The interference table creation unit 42 creates an interference table with reference to the stored level tables from the mobile stations, and the beam assignment unit 43 further stores the level table of the mobile station that has requested communication in the storage unit 41;
Referring to the interference table, beam assignment is performed, a beam designation signal consisting of a base station number and the assigned beam number is given the mobile station number, and supplied from the output unit 44 to the signal processing coding unit 32, and the Send to the station. Storage unit 41,
Interference table creating unit 42, beam allocating unit 43, output unit 4
4 is sequentially performed by the control unit 45.

Next, FIG. 11 shows an example of a device configuration of a mobile station.
Similarly to the base station, a plurality of antenna elements 51, a circulator 52, a receiving unit 53, a transmitting unit 54, an AD converter 55, a receiving adaptive pattern control device 56, a signal processing control decoding unit 57, an output terminal 59, an input terminal 61, Signal processing control coding section 62, transmission adaptive pattern control device 6
4. A DA converter 65 is provided. However, the number of the adaptive pattern control devices 56 and 64 is one each, and in the direction of the mobile station communicating the main beam of the antenna pattern,
Adaptive control is performed to direct a null or low level towards the interfering mobile station, respectively. Also, only one signal processing control decoding unit 57 and one signal processing control coding unit 62 are provided.

According to the embodiment of the present invention, the output of the reception adaptive pattern control device 56 is
And the reception level of each beam of each base station is detected. For example, each base station number and beam number are stored in the storage unit 72, and a combination of each base station number and each beam number is extracted by the replica signal generation unit 73, that is, each pilot signal shown in FIG. A signal corresponding to the pilot signal from the base station at the output of the reception adaptive pattern control device 56, that is, a replica signal is created, and the correlation between this replica signal and the output signal of the reception adaptive pattern control device 56 is synchronized with the signal format. In this state, the level detection unit 71 takes the correlation output and sets the correlation output as the beam reception level of the base station number and the beam number.

The level table creator 74 creates a level table in which the detected values of the reception levels of the beam numbers are arranged in ascending order of the beam numbers for each base station.
The average reception level of all the beams of each base station is calculated by the average level calculation unit 75, and the level table of the m base stations having the high average level is added to the base station number and the mobile station identification signal from the output unit 76. The signal is supplied to the signal processing control encoding unit 62 and transmitted to the corresponding base station. The assigned beam received from each base station, that is, the beam instruction signal, is taken in from the signal processing control decoding unit 57 at the input unit 77, and the base station and the communication base station communicate with the beam from the received beam instruction signal of each base station. The decision unit 78 decides. The operations of the level detector 71, the replica signal generator 73, the level table generator 74, the average level calculator 75, the output unit 76, the input unit 77, and the communication base station determination unit 78 are sequentially performed by the control unit 79. . The control unit 79 includes the adaptive pattern control device 56,
64 are initialized to form an omni-directional pattern, and initialization is performed to direct the main beam pattern to the base station and its beam determined to be used for communication. Instead of the base station number beam number storage unit 72 and the replica signal generation unit 73, a replica signal corresponding to each pilot signal may be stored in the storage unit in advance. Level detection for creating a level table may be configured to be performed in parallel.

From these level detections, the base station and beam used for communication are determined, for example, as shown in FIG.
By executing the program in the memory 82 by the CPU 81, the output of the receiving adaptive pattern control device 56 is stored in the storage unit 84 from the acquisition unit 83, and the base station number and the beam number are extracted from the storage unit 72 to generate a replica signal. Then, the reception level of each beam of each base station is detected by correlating with the received signal fetched by the storage unit 84, and a level table for each base station is created from the reception level, and the average of all beams is further averaged. The reception level is calculated, the m level tables are transmitted through the output unit 85, the received beam indication signal is fetched from the input unit 86, the beam of the communication base station is determined, and the adaptive pattern control unit 56,
For example, the initial setting for 64 is performed through the control unit 87,
It may be performed by so-called software processing. The processing from the reception of the level table by the base station to the beam assignment and the transmission of the beam instruction signal may be similarly performed by software processing.

As described above, in the present invention, since the independent operation is performed only in the downlink transmission system from the base station to the mobile station, different adaptive operations can be applied for transmission and reception. In particular, this algorithm can be used for downlink transmission from a base station to a mobile station, and a conventional algorithm can be used for reverse transmission (uplink). In this embodiment, the signal quality table is created based on the reception level. However, the signal quality table may be created using another criterion that determines other reception quality such as an SN ratio and an error rate. Further, as shown in FIG. 8, the mobile station not only operates before the start of communication, but also appropriately repeats this operation during standby, which is useful for the base station to know how much the mobile station is around. It is convenient.

In the above description, the mobile station may use an omnidirectional pattern without performing adaptive pattern control. Also, when performing adaptive pattern control, step S
If the reception level becomes equal to or less than the predetermined value without using the base station beam determined first without returning to step S4 during the communication of step 12, processing after step S3 may be performed. The mobile station calculates the average reception level of all the beams for each base station and transmits the upper m level tables. However, without calculating such an average reception level, for example, S
The level table may be transmitted for all base stations that have received a beam of L (threshold level) or higher. The base station also transmits the interference amount Iv of the assigned beam number to the mobile station while including it in the beam instruction signal.
v is not transmitted, only the assigned beam number is transmitted, and the mobile station uses the highest reception level at the mobile station among the beam numbers of the received beam designation signals for communication. In addition, the present invention relates to FDMA, T
The present invention can be applied to both DMA and CDMA, and the base stations around the mobile station may use, for example, the same frequency or the same spreading code.

[0027]

As described above, according to the present invention, rather than transmitting numerical data such as the reception level from all the mobile stations to the base station with a certain accuracy, for example, a simple ranking table and a number are used. Only by transmitting the digits, it is possible to select an appropriate base station beam, determine the reception pattern of the mobile station as needed, and update these as needed. Therefore, for example, a multi-beam antenna having a beam width of about several degrees is used as the base station antenna, and an appropriate base station beam is obtained from transmission information from a small number of mobile stations to the base station (uplink). A mobile communication system capable of transmitting (down) information can be realized.

[Brief description of the drawings]

FIG. 1 is a diagram showing an example of a mobile communication system using a multi-beam antenna for a base station.

FIGS. 2A and 2B show a state of shaping a radiation pattern at the time of an adaptive operation, and FIG.
(B) is for controlling (switching) only the peak by the multi-beam antenna.

3A is a diagram showing the relationship between the size of the antenna and the beam width, FIG. 3B is a diagram showing the size of the aperture surface of the aperture antenna, and FIG. 3C is a diagram showing the size of the array surface of the array antenna; FIG.

FIG. 4 is a diagram showing a configuration of a mobile communication system according to the embodiment of the present invention.

FIG. 5 is a diagram showing an example of a signal format transmitted by each beam of each base station.

FIG. 6 is a diagram showing an example of a level table created internally by each mobile station.

FIG. 7A is a diagram illustrating an example of a level table of each mobile station received by a base station, and FIG. 7B is a diagram illustrating an example of an interference table created in the base station.

FIG. 8 is a flowchart showing an example of an operation procedure of a mobile station.

FIG. 9 is a flowchart showing an example of an operation procedure of a base station.

FIG. 10 is a diagram showing an example of a functional configuration of a device of a base station.

FIG. 11 is a diagram showing a functional configuration example of a device of a mobile station.

FIG. 12 is a diagram showing one of the other functional configurations of the mobile station device.

FIG. 13 is a diagram showing a configuration of a conventional mobile communication system that changes a radiation pattern shape with time.

Claims (9)

[Claims] 1. A mobile communication method for communicating with a mobile station by changing the radiation pattern shape of the base station with time, wherein the base station forms a multi-beam radiation pattern, and the mobile station relates to radio waves from peripheral base stations. A mobile communication method comprising: transmitting information to a base station via a communication line; and the base station controlling the switching or combination of the multi-beam radiation pattern of the base station based on the information from the mobile station. 2. The mobile communication method according to claim 1, wherein the base station includes the beam identification signal in information transmitted from each beam of the multi-beam radiation pattern, and the mobile station transmits each received beam identification signal to the information. Create a signal quality table arranged in the order of good signal quality at the time of receiving each beam, transmit the table to the neighboring base stations as the above information, each base station and the mobile station to communicate based on the A beam to be used for communication is allocated, and the allocated beam identification signal is transmitted to the mobile station, and the mobile station determines the base station to communicate with based on the received allocation beam from the peripheral base station based on the identification signal. Mobile communication method. 3. The mobile communication method according to claim 2, wherein the creation of the signal quality table, communication, allocation of the beam, transmission of the identification signal thereof, and determination of the base station to communicate with and the beam are repeated. Mobile communication method. 4. The mobile communication method according to claim 1, wherein the base station switches a beam used for communication or switches to communication with another base station based on a communication state with the mobile station. A mobile communication method, comprising: 5. The mobile communication method according to claim 1, wherein the mobile station determines a reception state and / or information from the base station to control a radiation pattern shape. Communication method. 6. The mobile communication method according to claim 2, wherein each base station uses a received signal quality table from each mobile station to determine a degree of interference of each beam of the base station. Obtain an interference table, allocate a beam used for the communication based on the received signal quality table and the interference table for each mobile station, transmit the allocated beam identification signal and the degree of the interference to the mobile station, A mobile communication method comprising: determining a base station to communicate with and a beam based on an allocated beam identification signal received from each base station and a degree of interference. 7. A signal quality detecting means for detecting a signal quality for each beam of each multi-beam radiation pattern of a peripheral base station, and a signal quality table in which beam identification signals are arranged in descending order of detected signal quality for each base station. And transmitting to the base station. 8. The mobile station apparatus according to claim 7, further comprising: means for determining a base station to communicate with from an assigned beam identification signal received from each of the base stations in the vicinity and an interference amount of the beam. Mobile station equipment. 9. A means for forming a multi-beam radiation pattern, means for storing a signal quality table in which beam identification signals are arranged in the order of received signal quality for each beam of a multi-beam received from each mobile station, Means for obtaining an interference table for each beam from the signal quality table from each mobile station to create an interference table; A base station apparatus for mobile communication, comprising: means for allocating by referring to a signal quality table and an interference table; and means for transmitting an identification signal of the allocated beam to the mobile station.