JPH11298954A - Method and system for radio communication - Google Patents

Abstract

PROBLEM TO BE SOLVED: To increase the capacity for subscribers in an area of high traffic. SOLUTION: A base station 1, such as a CDMA radio base station is connected to a base station controller 3 and an exchange station 4 via a communication channel 2. A cell operated by the base station 1 is divided into three wide angle sectors 5-7, wherein narrow angle sectors 8, 9 are overlaid on the sector 5. A tip level or the like is synchronized for the sectors 5, 8, 9, and the same code is used for them. A radio terminal recognizes signals in both the sectors as a multi-path in a down link and applies rake synthesis to the signals. A base station 1 receives transmission signals in an up link by applying space diversity by both the sectors and applies rake synthesis to the signals. Or the base station 1 may be distributes transmission power signals to each sector in response to the strength of received signals or the area of each sector may be changed, depending on the distribution density or the traffic distribution or the like.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a radio communication method and a radio communication device, and more particularly to a radio communication method and a radio communication device that operate one cell as a plurality of sectors in a radio communication system such as a cellular system. .

[0002]

2. Description of the Related Art In recent years, a CDMA (Code Division Multiple Access) radio base station which divides a cell into a plurality of sectors for operation has been proposed. FIG. 11 shows a configuration diagram of a conventional wireless communication system.

[0005] The base station 11 is connected to a base station control device 13 via a communication line 12. The base station controller 13 is connected to the exchange 14 by an interface. Further, the base station control device 13 controls the communication line 1
2 and connected to one or a plurality of base stations 11, and has a function of terminating the radio interface and switching signals from the base station 11, switching between physical channels and logical channels, and the like.

[0004] In this example, one cell operated by the base station 11 is divided into three sectors 15 to 17. In such a conventional CDMA cellular system, the sectors 15 to 17 constituting a cell are transmitted at a uniform transmission power distribution with respect to the angle in the sector.
At this time, the traffic of the entire sector is considered,
The traffic distribution inside the sector is not considered.

[0005]

Generally, for the power resources in the above-described sector configuration method, it is necessary to perform effective sector allocation and power allocation in consideration of the following.

(1) In general, traffic distribution within a sector is not uniform and often concentrates on a specific area. Traffic also fluctuates over time. CDM
In A, by arranging sectors so that transmission power is concentrated in a traffic concentrated area by means such as multi-sectors, efficient sectorization is possible. But CD
In the case of MA, high-speed mobile users and the like have problems such as frequent handoffs. Therefore, it is necessary to secure a handoff margin, that is, to secure a reserved channel for handoff with an adjacent station.

(2) Demand for data communication is expected to increase in the near future, but generally high data transmission power is required for data communication. Therefore, the above (1)
The above point also needs to be examined in terms of data communication demand. As for a data communication terminal, a sector with a narrow beam angle is generally sufficient as long as the user is a low-speed user. Conversely, a sector configuration with a wide beam angle may interfere with other low-power users existing in a wide sector, resulting in reduced line quality and capacity.

(3) For a high-speed mobile terminal, a sector having a wider beam angle is generally considered to be more effective because a handoff is not required. However, for pedestrians and stationary users, a narrow beam angle sector is sufficient. Therefore, the current method of uniformly covering the inside of a sector with the same power is not always efficient.

In view of the above, an object of the present invention is to provide the following radio communication method and radio communication device.

(1) One or a plurality of N-sectors (narrow-angle sectors) overlay areas are set in the W-sectors (wide-angle sectors), and the capacity in the W-sectors is increased spatially.

(2) The W-sector and the N-sector operate at the same frequency and use exactly the same code channel in synchronization, so that despite the increased number of sectors, inter-sector identification is not performed. Eliminate the need for overhead capacity due to handoff required in multi-sector operation.

(3) In the W-sector, the transmission power is reduced by transmitting the power corresponding to the traffic other than the area where the N-sector is overlaid with the minimum power required to cover the service area. And labor saving.

(4) To dynamically set the direction of the N-sector by using the position registration data and the position information of the wireless terminal together.

(5) By using signal systems such as orthogonal polarization and circular polarization in the W-sector and the N-sector, it is possible to apply a diversity function such as polarization / space / frequency diversity to a specific user. And improve line quality.

(6) Except for an antenna and an input / output unit such as a high-frequency circuit, it can be realized by using exactly the same device as that used for multi-sector. In addition, add a diversity function as needed.

(7) Easy application to second generation mobile communication systems.

[0017]

According to the present invention, in an area of high traffic in a wide-angle sector, a narrow-angle sector using the same code as the wide-angle sector is overlaid synchronously at the chip level or the like, thereby reducing the subscriber capacity. We are trying to increase it.

The present invention has several of the following features.

(1) The conventional W-sector and N-sector are shared in the same sector.

(2) Channel elements (portions for performing channel coding, information modulation, spreading modulation, and demodulation processing for each channel) are shared between the W-sector and the N-sector, and one or both of them are used. Assigned dynamically according to the multi-path by the sector.

(3) The traffic distribution can be estimated from geographical and / or temporal factors. For high traffic densities or high-speed data transmission areas, a narrow beam angle N
-Sector response. On the other hand, sparse traffic densities or high-speed mobile users should be handled by W-sectors with a wide angle beam angle. The entire sector is W-
Cover with sectors.

(4) The ratio of the overhead channel to the total transmission power is the same for the W-sector and the N-sector.

(5) Synchronization between the W-sector and the N-sector at a chip level or the like is established.

(6) Call processing is performed between the W-sector and the N-sector as the same sector. There shall be no handoff between W-sector and N-sector.

(7) If it is necessary to identify the W-sector and the N-sector, the identification may be performed by applying a signal system such as orthogonal polarization or circular polarization.

(8) When a signal system such as orthogonal polarization is used, the radio terminal may apply a diversity function such as polarization diversity using both W-sector and N-sector beams.

(9) If the base station is capable of changing the direction or angle of the sector, it collects position information from the radio terminals and, for an area with a large traffic or transmission capacity, the direction and / or direction of the N-sector. Alternatively, the beam angle may be set.

(10) In the above (1) to (9),
Although reference is made to the beam angle of the N-sector, for example, in a system in which traffic is concentrated at the center of the cell, the same can be said for the cell radius. That is, a large radius sector (L-sector) and a small radius sector (S-sector)
May be overlaid as described above.

According to a first solution of the present invention, one cell is divided into one or a plurality of wide-angle sectors, and one or a plurality of narrow-angle sectors are partially divided into one or a plurality of the wide-angle sectors. For the radio signal in the wide-angle sector and / or the narrow-angle sector where the radio terminal is overlaid and the radio terminal is located, the radio signal is set to the same code in each sector for each radio line set between the radio terminal and the base station. For each radio line, one or a plurality of received signals from each sector where the wireless terminal is located, demodulated and received by the same code, and for each wireless line, each sector where the wireless terminal is located The transmission signal to
Provided is a wireless communication method for transmitting data after modulating the same code.

According to the second solution of the present invention,
One or more divided wide-angle sectors in which one cell is divided, one or more narrow-angle sectors which partially overlay one or more wide-angle sectors and one or more narrow-angle sectors, and a wireless terminal are located. For radio signals in the wide angle sector and / or the narrow angle sector,
For each radio line set between the radio terminal and the base station, a control unit that allocates a radio signal with the same code in each sector, and for each radio line, one or each of the sectors where the radio terminal is located A channel element receiving system that demodulates and receives a plurality of received signals with the same code, and a channel element that modulates, with the same code, a transmission signal to each sector where a wireless terminal is located for each of the radio lines and transmits the same. A wireless communication device including a transmission system is provided.

[0031]

BEST MODE FOR CARRYING OUT THE INVENTION 1. Basic Concept of Wireless Communication System FIG. 1 shows a configuration diagram of a wireless communication system according to the present invention. This diagram shows a cell configuration in a CDMA cellular system as an example.

A base station 1 such as a CDMA radio base station is connected to a base station controller 3 via a communication line 2.
The base station controller 3 is connected to the exchange 4 via an interface.
Is connected to Further, the base station controller 3 is connected to one or more base stations 1 via the communication line 2,
It has a function of switching a signal from the terminal of the wireless interface and the base station 1, switching between a physical channel and a logical channel, and the like.

In this example, one cell operated by the base station 1 has three wide-angle sectors (W-sectors) 5 to 5.
It is divided into seven. W-sectors 5 to 7 are transmitted with a uniform transmission power distribution for angles within the sector.
Further, one or more narrow-angle sectors (N-sectors) covering a narrow angle are overlaid (superimposed, superimposed, etc.) on one W-sector. This figure shows an example in which N-sectors 8 and 9 are overlaid on W-sector 5. The overlaid area is assumed to be, for example, a high traffic area where traffic is concentrated geographically or temporally. An area that is not overlaid is, for example, an area where the traffic is lower compared to such a high traffic area, and W
-Covered by sector 5 only.

Next, with regard to synchronization, the W-sector 5 and the N-sectors 8 and 9 are operated with, for example, chip-level synchronization. Here, the synchronization at the chip level means that the signal at the logic level is encoded by orthogonal encoding or the like,
Further, it refers to a state where individual chips (or bits or the like) at the time of spreading processing (scramble) are synchronized. In addition, according to the system design, it can be appropriately changed so as to synchronize at a required level such as a logical code level, a coding level, or a clock level.
The same code (or the same code and the same phase) is used as a code for identifying a channel, a sector, or a link such as a PN code (pseudo-noise code) or a hopping pattern.

Next, communication between the radio terminal and the base station 1 will be described. First, downlink (transmitted by base station 1)
For, wireless terminals located in high traffic areas,
Radio waves from both the W-sector and the N-sector are received.
For the wireless terminal, the signals of the W-sector and the N-sector are recognized as multipath. The wireless terminal rake-combines the received signals using a rake receiver. On the other hand, for the uplink (transmitted by a wireless terminal), the base station 1 transmits a transmission signal from a wireless terminal located in a high traffic area,
Receive as spatial diversity (or multipath) with W-sectors and N-sectors. This received signal is rake-combined in the same manner as a multi-sector base station.

Here, the transmission signal from the base station 1 to the radio terminal may be distributed to the W-sector and the N-sector according to the strength of the received signal. The N-sector area may be fixed or variable. Further, if it is possible to collect position information (latitude, longitude, etc.) from the wireless terminal, the N-sector or W-sector area may be changed according to the distribution density or traffic distribution of the wireless terminal. good.

2. Next, an overview of hardware of the wireless communication system of the present invention will be described. In this system, the W-sector and N
A sector is the beam angle of the antenna and sector and / or
Alternatively, almost the same system is used except for the setting of the allowable transmission power and the like. That is, using the same channel element or the like, a high-frequency circuit unit is selected by a selector element provided in a multi-sector system. In both sectors, the input / output section mainly including the high-frequency circuit unit and the antenna has a different configuration.

First, the base station receiving system will be described. In the base station receiving system, the radio terminal signals received simultaneously from the W-sector and the N-sector are each recognized as a multipath component. Recognition is the same as in the conventional handover between sectors, and rake combining is enabled. The base station calculates Eb / No from the received signal after rake combining, and performs power control. Here, Eb / No is “bit energy (power) to noise power density”, and a signal to noise power ratio per information bit (S / N or SNR: Signal)
to Noise power Ratio) (Reference: The ratio bet)
ween the energy of each information bit (Eb) a
nd the noise spectral density (No)). Note that this “noise power density” can also be defined as “thermal noise power + interference wave power per band”. Further, the base station receiving system calculates the received power ratio between the W-sector and the N-sector,
Feedback can also be provided to the transmission system.

Next, the base station transmission system will be described.
In the base station transmission system, a power ratio per link distributed to each sector to be transmitted is determined based on a reception power ratio from the W-sector and the N-sector. If the received power ratio is unknown, transmission is performed based on the power distribution ratio of overhead channels (pilot channel, paging channel, other broadcast channels, etc.). That is, the overhead channels from the base station transmission system are transmitted simultaneously at a predetermined power ratio proportional to the communication limit capacity of the W-sector and the N-sector. Here, for example, if the overhead channel capacity of the N-sector is too small compared to the total transmittable power, a sufficient Eb / No value may not be obtained and call control may not be possible. It is preferable to determine the power ratio in such a manner.

Next, the wireless terminal will be described. Even if the power is distributed and transmitted from the base station 1 by the W-sector and the N-sector, the receiving system of the wireless terminal receives the combined signal of a plurality of wireless signals. That is, when the propagation paths are different, they are received as multipaths of the same code channel and rake combined. On the other hand, the transmission system of the wireless terminal transmits without considering the W-sector and the N-sector at all. Therefore, the wireless terminal does not require a new function.

When a signal system such as orthogonal polarization is used in the W-sector and the N-sector, a diversity function such as polarization diversity can be added on the receiving side of the radio terminal. If the polarization identification is set between the wireless terminal and the base station, multiplex communication is also possible.

3. Next, an overview of call control will be described.

First, the location registration of the wireless terminal is performed in either the W-sector or the N-sector. The location of the wireless terminal can be identified, for example, by a base station controller. The beam angle and / or direction of the N-sector may be set based on the position information from the wireless terminal or the statistical data of such position registration. This setting is performed at the input / output unit of the base station by selecting an antenna, controlling directivity, setting transmission power, and the like. The wireless terminal recognizes that the W-sector and the N-sector are only one and the same sector.

Next, a case where a call is made from a wireless terminal will be described. The call control in this case is the same as that of a normal multi-sector system operation, and does not require a new function. As for the access channel, in the base station receiving system,
Rake combining is difficult because the channel cannot be recognized until the frame is decomposed. Therefore, the base station sets a link in either the W-sector or the N-sector. The access channel is identified by, for example, the base station controller after frame disassembly. The traffic channel has W
-Received in either or both sectors and N-sectors, but rake combined even if the sectors are different. These procedures are the same as those in the call control at the time of multi-sector according to the standard such as IS-95, and the synthesis of the inter-cell handoff.

In the case of a call from the base station, W-
It is broadcast by paging from both the sector and the N-sector. At the base station, control is the same as in multi-sector operation, except that power is distributed to both sectors.

Next, control when the wireless terminal moves between W-sector / N-sector will be described. When the wireless terminal is located in the area where both sectors are overlaid, the transmission signal of the wireless terminal is received in both sectors. Furthermore, W-
Since the same code is used between the sector and the N-sector, the base station receiving system rake-combines the signals received by both sectors. A transmission signal from a base station can be transmitted with power distributed from both sectors based on the power distribution in which a received signal from a wireless terminal is received in a W-sector and an N-sector. Therefore, the wireless terminal can communicate with the base station without being aware of the W-sector and the N-sector at all.

Next, FIG. 2 is an explanatory diagram of a frame configuration and power distribution. FIG. 2A shows the frame configuration and power distribution of the W-sector, and FIG. 2B shows the frame configuration and power distribution of the N-sector.

As shown, in each sector, the frame structure includes an overhead including pilots 21W and 21N (Pilot) and control channels 22W and 22N (CTRL CHs), and a plurality of traffic channels 23W and 23N.
(TCH). In N-sector and W-sector:
The overhead power that composes the channel (Pilot and CTRLC
As for (H power), the power and the total power ratio that can be transmitted may be variable, but it is preferable that the power ratio be the same in consideration of consistent system operation in the entire sector. That is, it is preferable that the following relationship be established. As a result, the same system parameters can be used in the N-sector and the W-sector.

PW-W (Pilot) / PW-N (Pilot)
= PW-W (CTRL) / PW-N (CTRL) = PW-W (TCH
_total ) / PW-N (TCH _total ) = PW-W _total / PW-
N _total where PW-W (Pilot) and PW-N (Pilot) are W-
Indicates the pilot power of the sector and the N-sector, PW-
W (CTRL) and PW-N (CTRL) indicate the control channel power of W-sector and N-sector, and PW-W (TCH _total ) and PW-N (TCH _total ) are W-sector and N-sector. Indicates the total power of the traffic channel of the sector, and also indicates PW-W
_total and PW-N _total indicate the total power of the W-sector and N-sector, respectively.

4. Details of hardware 4-1. Wireless Terminal Receiving System FIG. 3 shows a configuration diagram of the wireless terminal receiving system. This shows a configuration of a wireless terminal receiving system using a rake receiver, and the wireless communication system of the present invention can perform communication with a base station by using this.

The radio terminal uses a high-frequency circuit (RF, Digital Con
v.) 31, search element (SearchElement) 32, receiving element (finger) (Demodulation Element (finge)
r)) 33, controller 34, synthesizer (Symbol Co.
An mbiner 35 and a decoder (Viterbi Dec.) 36 are provided.
The high-frequency circuit 31 is connected to the antenna and includes a digital converter. The decoder 36 has, for example, a Viterbi decoder. A plurality of multipath received signals received by the high frequency circuit 31
2, the position and phase of each pulse are determined. Control unit 3
4 assigns each signal to each of the receiving elements 331 to 33n according to the output of the search element 32,
It adjusts and controls the phase, delay, S / N (signal / noise) of the received signal, input timing to the receiving element 33, and the like. Further, under the control of the control unit 34, the combiner 35 weights the phase, delay, amplitude, and the like of each signal by multipath, and adds and combines the received signals at an appropriate ratio (rake combining). Thereby, the wireless terminal can satisfactorily receive a weak signal. The combined signal is decoded by the decoder 36.

Signals transmitted from the W-sector and the N-sector are synchronized with each other, such as chip synchronization, and have the same code. That is, the wireless terminal can recognize and receive a signal from the same sector without distinguishing both sectors. In the wireless terminal, the W-sector is set to N
-Even if signals from the sectors are received out of time due to propagation delay, they can be recognized and received as multipath.

4-2. Base Station Transmission System Next, FIG. 4 shows a configuration diagram of the base station transmission system.

The transmission system of the illustrated base station 1 is, for example,
Base station 1 is composed of sectors A, B, and C, and sector A has a wide angle sector (a sector) and two narrow angle sectors (a-1 sector and a-2 sector). The base station transmission system includes a high frequency unit (RF-UNIT) 41 to 43 for each sector, a control unit (Controller) 45,
Vocoder and processing interfaces of layers 2 and 3 (V
ocoder and Layer 2/3 Processing Interface) (VLP
Interface) 46, channel element (CH Elemen)
t) 47, and a signal combining unit (Signal Combiner) 48.
The base station controller 3 includes a VLP 49 having a vocoder and processing units of layers 2 and 3, and processes a signal received from the exchange of the exchange 4. The output of VLP49 is
Via the communication line 2, the VLP interface 4 of the base station 1
6 is input.

The VLP interface 46 has a multiplex converter. In both blocks of the base station transmission system / reception system, signal processing is performed using a signal format such as a packet signal or ATM. It is necessary to convert the traffic signal and signaling (control signal) in the channel element 47 into these formats, and the VLP interface 46 is a part that performs this conversion function. Also, the VLP interface 46
It also has a function as a transmission device between the channel element 47 and the VLP 49. In the case of CDMA, it is often a multiplex conversion device using a packet or ATM.

The control unit 45 includes high-frequency units 41 to 43
For example, the transmission power information in the signal combining unit 48 and the channel element 47 is collected, and it is confirmed whether the operation is performed according to the preset system parameters and the operation is corrected. The channel element 47
Manages the resources related to the allocation of the transmission line to the transmission line. Here, the resources are, for example, assigned hardware, codes, signal power, allowable interference power, and the like.
Further, the control unit 45 performs monitoring of a protocol in the base station and notification and management of timing information.

The signal synthesizing section 48 synthesizes the signals of the respective channel elements 47 and converts them into transmission signals by the high frequency unit. Here, as an example, a high-frequency unit (RF-UNIT) 41 transmits a sector (wide-angle sector), and a high-frequency unit (RF-unit) transmits a-1 and a-2 sectors (narrow-angle sector). -UNIT) 42 and 43 respectively. In addition, the input / output unit 10 is configured by the high-frequency units 41 to 43 and / or connected antennas and the like, and the angle, direction, shape, and the like of the sector can be appropriately controlled.

Next, the operation of the base station transmission system will be described.

First, the downlink signal transmitted from the VLP 49 is encoded and scrambled by an orthogonal code or the like by an individual channel element 47 for each channel. Thereafter, the signal is conveyed to the signal synthesizing unit 48. According to the attribute of the signal, the signal is distributed to an appropriate sector or a plurality of sectors by an appropriate power distribution according to the attribute of the signal, and transmitted from each sector. The power distribution method can be such that, for example, a downlink power channel such as a pilot channel or a paging channel can be transmitted using a predetermined power value or a power distribution between N-sectors and W-sectors.

As for the traffic channel, in the case of asymmetric transmission using only the downlink, several methods are available. The first method is a method in which transmission is performed using a predetermined power value and power distribution between N-sectors and W-sectors, similarly to the overhead channel. Other methods require a response from some wireless terminal, e.g., estimate the position of the wireless terminal using position information from the wireless terminal, select the most appropriate sector, or It is transmitted by appropriate power distribution. Specifically, for example, by increasing the power of the sector covering the wireless terminal according to the location information of the wireless terminal in use, or based on the statistical information of the location of the wireless terminal in use, the number of used wireless terminals , Power can be allocated to each sector. Alternatively, a method may be adopted in which the power control information is monitored as needed as a control signal from the wireless terminal to optimize sector selection or power allocation between sectors.

On the other hand, at the time of symmetric communication, the base station performs space diversity in the receiving system and performs rake combining in the channel element, and can separate signals arriving as a multipath for each sector. Therefore, it is possible to estimate the arriving signal power for each sector, and it is possible to distribute the transmission power based on the estimated value. For example, power can be distributed in proportion to the intensity of the arriving radio wave. At this time, the uplink (uplink) from the wireless terminal can include downlink (downlink) power control information from the base station.
Therefore, transmission power can be optimized for each line. This will be described later.

In this embodiment, the cell configuration by the sectors A, B and C has been described. However, the coupling between the sectors is not limited to the relationship between only the W-sector and the N-sector in the same sector. It may be performed beyond the framework of the sectors A, B and C here. That is, W of sector A
Even when the wireless terminal is located in the coverage of the W-sector and the N-sector of the sector and the sector B, the present invention can be applied by the same configuration and operation.

4-3. Base Station Reception System Next, FIG. 5 shows a configuration diagram of the base station reception system.

In this base station receiving system, as described above, the base station 1 is composed of the sectors A, B and C, and the sector A is composed of a wide-angle sector (a sector) and two narrow-angle sectors (a- 1 sector and a-2 sector). The base station receiving system consists of high frequency units (RF-UNIT) 51 to
53, Controller 55, VLP interface
(VLP Interface) 56, channel element (CH Elemen
t) 57, and a signal distributor (Signal Distributor) 58. The base station controller 3 comprises a VLP 59 having a vocoder and processing units of layers 2 and 3, and a switching center 4
Process the signals sent to the switch. The output of the VLP interface 56 is transmitted through the communication line 2 to the VLP of the base station 1.
59 is input. The input / output unit 10 is configured by the high-frequency units 51 to 53 and / or connected antennas and the like, and the angle, direction, shape, and the like of the sector can be appropriately controlled.

The VLP interface 56 has a multiplex conversion device, is a part that performs a format conversion function as in the base station transmission system, and also has a function as a transmission device between the channel element 57 and the VLP 59.

The control unit 55 includes high-frequency units 51 to 54
For example, the reception power information in the signal distribution unit 58 and the channel element 57 is collected, and it is checked whether the operation is performed according to the system parameters set in advance and the operation is corrected. Further, the control unit 55 manages resources (hardware, codes, signal power, allowable interference power) related to the allocation of the channel element 57 to the reception line, monitors a protocol in the base station, broadcasts timing information, It manages.

For the sector a (wide-angle sector), the high frequency unit (RF-UNIT) 41 receives the signal and outputs a-1 and a-2.
For high-frequency units (RF-
UNIT) 52 and 53 respectively. After the signals received in each sector are filtered and down-converted by the high frequency units 51 to 53 and the like, the signals are distributed to the signal distribution unit 58, and the received signals are demodulated by the channel elements 57. At this time, the reception power for each sector and the Eb / No in each channel element are managed by the control unit 55 and serve as rake combining in the channel element and power control information to the radio terminal. Is reflected in the power distribution for each W-sector and N-sector.

5. Geographical Distribution of Capacity FIG. 6 is an explanatory diagram of the geographical distribution of system capacity. FIG. 6A illustrates sector A in detail, as an example, showing W-sector 5 and N-sectors 8 and 9 overlaid thereon. FIG. 6 (B)
Shows the distribution of the system capacity in the sector cross section indicated by the arrow in FIG. Here, positions a, b, c, d, e, and f in FIG. 6A correspond to the respective points in the sector cross section in FIG. 6B.

The whole sector includes W including the low traffic area.
-Covered in sector 5. The capacity of W-sector 5 is C
It is set lower than the DMA system capacity. The area excluding the high traffic area (low traffic area) is covered by the capacity of the W-sector 5. On the other hand, in the high traffic area, since the capacity is insufficient in the W-sector 5, the N-sectors 8 and 9 are overlaid. Only in the area where the N-sectors 8 and 9 are overlaid on the W-sector 5, the system is operated by traffic at the CDMA system capacity limit as shown in the figure. By setting such a capacity distribution, it becomes possible to set the sector capacity according to the traffic distribution.

6. Specific operation in each sector Next, in FIG.
The operation when moving along d, e, and f will be described in detail.

6-1. Calling operation from wireless terminal First, a case will be described in which the wireless terminal makes a call at point a, which is in the N-sector, and moves toward point f.

(1) Prerequisites for Radio Terminal At a point a, the radio terminal transmits a pilot signal (initial acquisition of code timing synchronization) and an overhead signal (system timing synchronization, system information, Paging information). In the base station 1, the point a is covered by only the W-sector 5 because it is included in an area having a small traffic distribution.

(2) Establishment of Radio Link (Line) When a radio terminal makes a call, it makes a call request using an access request signal (access channel). Here, in the base station 1, assuming that the access channel is received in the W-sector 5, the line is set in the W-sector 5, and the communication state is entered. It is assumed that the W-sector 5 is operated based on the power settings shown in FIG. Since transmission / reception of signals between the wireless terminal and the base station 1 is operated only by the W-sector 5, the transmission power of the wireless terminal is operated with the power distribution per link shown in FIG. 2 or less.

(3) Synthesizing Operation of Received Signals of Each Sector at Base Station 1 When the radio terminal moves to the vicinity of point b, the base station 1 transmits the signal from the radio terminal in both sectors W-sector 5 and N-sector 8. It enters the state of receiving the signal. In the base station 1, the received signal in each sector is received by the antenna and the high-frequency unit as different signals. The output of the high frequency unit is processed as a baseband signal. The output of the high-frequency unit is determined by the signal distribution unit 58 shown in FIG. 5 as to whether the signal has the same code. If the signal has the same code, the same channel element is assigned. Synthesis is performed. That is, the received signal processing process here is equivalent to space diversity by the antenna. From the rake-combined signal, power control bits are read out, inverse interleaving operation and error correction processing are performed, and V
Sent to LP59.

(4) Synthesizing operation of each sector transmission signal in base station 1 In the series of reception signal processing in (3), FIG.
It is possible to estimate received power from each sector per channel by the signal distribution unit 59 or the channel element 57 of FIG. The ratio of the received power of each sector of the W-sector 5 and the N-sector 8 is not necessarily optimized in the case of the FDD system, but can be assumed to be similar to the attenuation characteristic of the propagation path. Signal distribution unit 5 in FIG.
9 and W-sector 5 in channel element 57
And the reception power estimation result in each of the N-sectors 8 is:
The transmission power is transmitted to the signal combining unit 49 in FIG. 4 and sector allocation of transmission power is performed. That is, base station 1 assigns each of the signals to which channel coding, information modulation (spreading), and insertion of power control bits have been performed by channel element 47 in FIG. By distributing and transmitting to sectors, an effect close to transmission diversity can be obtained, and the quality of a received signal at a wireless terminal (improvement of Eb / No of a received signal) can be improved.

For example, when the transmission frequency of the base station 1 is different from the transmission frequency of the radio terminal (for example, FDD (Frequency
ency Division Duplex)) is a common case and corresponds to this case. When the transmission frequencies are the same, transmission and reception are performed with the transmission timing between the wireless terminal and the base station 1 shifted with respect to time (for example, TDD (Time Division Duplex)).
be able to. In this case, the effect of frequency fading can be minimized, so that an optimum transmission diversity effect can be obtained.

(5) Transmission / reception operation of wireless terminal In the wireless terminal, transmission / reception can be performed without being conscious of whether it is a W-sector or an N-sector. Due to the propagation delay of the signal from each sector, each received signal may be received as a superimposed wave of a signal shifted in phase, but the wireless terminal synthesizes a multipath component by rake synthesis, and Power control is performed, and despreading and decoding of channel coding are performed. Therefore, in the wireless terminal, the base station 1
The same effect as in the case of receiving the transmission diversity wave from is obtained. That is, the transmission / reception operation in the wireless terminal is exactly the same as the operation of simultaneously receiving from a plurality of sectors in a normal two-dimensionally arranged multi-sector except that the code for each sector is exactly the same. here,
Multi-sector means, for example, 360 in one cell.
This means that the degree is divided into three sectors every 120 degrees.

(6) The control of (3), (4) and (5) is performed between and around the positions b and c.
Since the base station 1 transmits data from both the W-sector 5 and the N-sector 8, it is necessary to allow the maximum capacity limit and transmittable power as shown in FIG. 6B.

(7) Between and around the positions c and d, the reception power of the N-sector received by the base station 1 becomes weak, and the W-sector 5 becomes dominant.

(8) The operation similar to the above (3), (4) and (5) is again performed between and around the positions d and e.

(9) Between and around the points e and f, the reception power of the N-sector received by the base station 1 becomes weak, and the W-sector 5 becomes dominant. This area is considered to be a handoff area with another adjacent sector.
The wireless terminal identifies the codes of the signal from the current sector and the signal of the new sector, and gradually switches the line to the new sector while rake combining the two lines.

(10) In the above operations (1) to (8), it seems that a handoff is being performed between the W-sector 5 and the N-sectors 8 and 9, but actually, both sectors are used. It only performs space diversity and rake synthesis. Under the conditions using these two sectors, the transmission power of the wireless terminal and the base station 1 is controlled to the minimum power value while satisfying the line quality by a normal power control method. The wireless terminal does not identify the W-sector 5 and the N-sector, and recognizes only one sector. This is the most different point from the above (9) which is a normal inter-sector handoff process.

Next, the operation when a call is made while the wireless terminal is in the N-sector will be described.

(11) The radio terminal receives a pilot signal (initial acquisition of code timing synchronization) and an overhead signal (system timing synchronization, system information, paging information, etc.) in the same manner as in (1) above. ing. Under this condition, the power ratio is constant in the W-sector 5 and the N-sectors 8 and 9, and the wireless terminal is irrelevant in either sector and does not need to be aware of this.

(12) When the radio terminal makes a call, W, N
Received in both or one of the sectors. When rake combining is performed on a received signal of an access channel, a link is set as a combined value of signals of each sector.
When rake combining is not performed, the signal of each sector is received as an independent access channel signal, and link setting is performed. After the link is set, the communication control state (3) is entered.

6-2. Calling operation of wireless terminal from base station First, an operation when the base station 1 calls a wireless terminal in the coverage of only the W-sector 5 will be described.

(1) As an example, the point a will be described. Point a is coverage of only W-sector 5, so
Paging channel of W-sector 5 (eg, base station 1
The connection request is transmitted from the base station 1 by the system condition notification / one of the overhead channels for wireless terminal call transmitted by the base station 1), and the line setting with the W-sector 5 is performed. The process after line setting is described in 6-1. (3)-
The control is the same as (10). The transmission power of the paging channels of the W-sector 5 and the N-sectors 8 and 9 is transmitted at a constant power with respect to the total transmittable transmission power.

Next, a case will be described in which the base station 1 makes a call to a radio terminal that is in an overlay coverage of both sectors.

(2) In this area, as shown in FIG. 6 (B), a fixed capacity is provided in advance in the W-sector 5 and the N-sectors 8 and 9; Can be considered equivalent. The power of the paging channel is set at a fixed rate with respect to the power distribution of each sector. The set ratio of the paging channel to the transmission power of each sector is the same for W-sector 5 and N-sectors 8 and 9. The contents to be transmitted and the timing are exactly the same. That is, the wireless terminal is equivalent to receiving signals transmitted from both the W-sector 5 and the N-sectors 8 and 9 using space diversity.

(3) The wireless terminal receives the paging channel described in (1) above using rake combining.
The wireless terminal performs signal transmission at the time of line setting using an access channel. The control procedure is as described in 6-1. The operation is the same as (2) and subsequent operations.

7. Control of line (link) unit of base station 7-1. Configuration of Base Station for Each Line In the present invention, the received power of each W-sector and N-sector is monitored. This is performed up to each line level, rake combining is performed, and used as an index for parameter setting at the time of combining (distributing at the line level) transmission power for each W / N-sector. This control is calculated based on the received power for each W / N-sector, Eb / No for each channel element, etc., and is converted to control information on the transmission side via the control unit.

FIG. 7 shows a block diagram of a control function for each line of the base station according to the present invention.

For each line (link), a signal distributor (Signal Distributor) 71 and a channel element receiving system 72 for each channel as a receiving system, a signal combining unit 73 and a channel element transmitting system 74 for each channel as a transmitting system,
Further, a control unit 75 is provided. The channel element receiving system 72 includes a demodulator including a rake receiver (Rake Receiver).
(Demodulator) 721, a pseudo noise generator (PN Generator) 722 for operating the same, and a deinterleaver and decoder (decoder) 723. The channel element transmission system 74 includes an Eb / No sensor (Eb / No Senso).
r) 741, pseudo noise generator (PN Generator) 742, digital power control section (Dig-Pw Ctrl) 743, interleaver and encoder (Interleaver / Encoder) 745, digital modulator (Dig Mod) 746, gain section 747, D /
An A converter 748 is provided.

7-2. First, the operation of the receiving system will be described.

A signal received from each wireless terminal in each sector is amplified by each high-frequency unit, down-converted in frequency, and transmitted to the signal distribution unit 71.

The main functions of the signal distributor 71 are filtering, gain adjustment, sampling for digital signal conversion, and distribution of signals to each channel element. The signal subjected to these processes is input to the channel element receiving system 72. The signal from each sector for one link is distributed to all the channel element receiving systems 72.

The operation of the channel element receiving system 72 is managed by the control unit 75. The operation related to the power setting is communicated with the transmission system via the control unit 75. For the input signals from all the sectors, the channel elements to which no channel is assigned yet
Attempt to obtain a spread signal by using the rake receiver. The pseudo noise generator 722 outputs a code such as a PN code and a hopping pattern for identifying a wireless terminal or a wireless line. Here, if it is determined that the signal provides sufficient Eb / No, the code of the pseudo noise generator 722 and its phase are locked, and the control unit 75 can allocate the line to the channel element 72 (channel element 72). Assignment 752 (CE Assignment)). The demodulated output from the demodulator 721 is transmitted to the deinterleaver and the decoder 723, where the interleaved signal is restored and error correction is performed by the decoder.

The channel element receiving system 72 includes:
It has a function of a power control loop for controlling uplink (uplink) transmission power and downlink (downlink) transmission power, and a function of estimating power received in sector units. These will be described later.

Next, the operation of the transmission system will be described.

In the channel element transmission system 74, the information to be transmitted is transmitted by an interleaver and an encoder 74.
5, error correction coding and interleaving are performed.
According to an instruction from the control unit, P
A code such as an N code is assigned to each user. The digital modulator 746 performs digital modulation and spreading using the assigned codes. In this process, the Eb / No sensor 741 causes the uplink power control bit 744
Is inserted. The gain section 747 is a section for determining the gain of the digital signal. Although the power of the entire sector is determined by the high frequency unit, it is necessary to determine the distribution of the transmission power, and the gain unit 747 determines the distribution.

7-3. Power Control (1) Power Control Loop The power control loop includes an uplink (wireless terminal transmission) and downlink (base station 1 transmission) power control loop. For uplink power control, the Eb / No sensor 741 compares the Eb / No of the received signal demodulated by the demodulator 721 with a threshold value, and sets an uplink power control bit 744 in the transmission signal according to the result. Set Upli
nk Pw-Ctrl Bit).

On the other hand, since the power of the downlink cannot be measured by the base station 1 itself, it is necessary to report from the radio terminal. In the present embodiment, the wireless terminal is connected to base station 1
It is assumed that the wireless terminal inserts a downlink power control bit in the same manner as in the case of inserting an uplink power control bit in. The base station 1 includes a demodulator 721
A power control bit is extracted from the demodulated output from the base station, and the result is transmitted to the channel element transmission system 74 via the control unit 75 via the extracted downlink power control bit (Extract Downlink Control Bit).
k Pw-Ctrl Bit) 751.

Estimation of the power received in sector units is as follows. The received power of each sector is monitored by a high-frequency unit or the like, and the power normalized for each sector is monitored by the signal distribution unit 71 or the like. These pieces of information are reported to the control unit 75 as the estimated power 753, and are updated as needed. Since the same code is used for the W-sector and the N-sector, it is difficult to identify the sector by the code. However, the power ratio from each sector can be estimated by the channel element 72 in the same manner as the space diversity. Become. In the channel element 72, since delay estimation can be performed for each multipath signal component, this can be used.

Transmission power distribution from base station 1 is determined using the above-described estimated value of the sector reception power in channel element units, that is, channel units. It is to be noted that transmission may be performed at a predetermined power ratio without using this.

(2) Sector Transmission Power Distribution The transmission power distribution of the W-sector and N-sector may be given at a fixed ratio. In this case, transmission power control is mainly performed by the downlink power control bit 751, and power is allocated by the digital power control unit 743 for each sector at a fixed ratio. The power allocated by the gain unit 747 based on the control of the digital power control unit 743 is D / A
D / A conversion is performed by the converter 748 and the signal distribution unit 73
Thus, the signal is superimposed on other signals for each sector, and transmitted with the power allocated from each sector after high-frequency amplification in the high-frequency unit. The power actually transmitted can be controlled by the input / output unit 10 or the signal distribution unit 73 or another appropriate configuration.

On the other hand, it can be sufficiently assumed that the space diversity by the W-sector and the N-sector is effective. In this case, dynamic power allocation between the W-sector and the N-sector is considered. In the TDD system, transmission and reception signals use the same frequency, so that transmission diversity close to optimal is possible. In the FDD system, the accuracy may be unavoidably reduced due to the difference in frequency between transmission and reception, but the reception performance can still be improved in many cases.

In the present embodiment, the control of the downlink power control bit 751 by the control unit 75 and the digital power control unit 743
The power control method is adopted. Further, transmission is performed with a power distribution according to the received power for each sector obtained by the above-described method, thereby aiming to improve the space diversity effect. For example, control for setting the transmission power in proportion to the reception power can be performed. Specifically, the reception power for each sector estimated by the demodulator 721 and the control unit 75 is fed back to the digital power control unit 743. In this case, the gain unit 7
47, at the time of power allocation, power is dynamically allocated to each sector based on information from the control unit 75, and the transmission signal to which power is allocated is transmitted by the D / A converter 748 for each sector. D / A conversion is performed. Further, the output of the D / A converter 748 is superimposed for each sector by the signal synthesizing unit 73, and thereafter, is subjected to high-frequency conversion and amplification by a high-frequency unit and transmitted.

8. Other embodiments 8-1. Control of Direction / Directivity, etc. As described above, the method of performing power control according to the position of the wireless terminal has been described. For example, the direction, angle, and / or shape of each sector can be set and changed based on the position and / or statistical data of the wireless terminal. Such setting / change can be performed by, for example, means for deflecting the direction and directivity of the antenna of the input / output unit 10. Furthermore, these controls can be combined with the power control described above.

8-2. Diversity function For example, by applying orthogonal polarization between the W-sector and the N-sector, it is possible to satisfy a user request that requires high channel quality. In this case, in the base station 1,
In the W-sector and the N-sector, power distribution per user line is set, and transmission is performed by separating the two polarizations. On the other hand, in a wireless terminal, a receiver having a polarization separation / combination function in the wireless terminal Is provided, polarization diversity can be realized.

FIG. 8 shows a configuration diagram of a base station transmission system having a polarization transmission function.

The difference from the base station transmission system configuration shown in FIG.
To 83 are provided. Here, as an example, a polarization unit 81 that provides V (vertical) polarization is provided for the W-sector, whereas a polarization unit that provides H (horizontal) polarization is provided for the N-sectors 8 and 9. 82,
83 are provided respectively. A similar polarization unit can be provided in the base station receiving system. In addition, any one of the sectors may be appropriately set to vertical / horizontal polarization, and other polarization methods such as circular polarization, and space / frequency diversity other than polarization may be applied.

8-3. Other Overlay Arrangement In the above description, the overlay is realized by the wide-angle sector and the narrow-angle sector, but the present invention can be applied to other cases.

FIG. 9 is an explanatory diagram of the second embodiment relating to the overlay. In FIG. 9A, a large radius sector (large radius sector) 91 and a small radius sector (small radius sector) 92 are overlaid. Further, FIG. 9B shows this modification, in which two types of small radius sectors 93 and 94 having a radius are overlaid on a large radius sector 91.

FIG. 10 shows a third example of the overlay.
The explanatory view of the embodiment is shown. In FIG. 10A, a small radius sector 102 and a small radius sector 103 are overlaid on a large radius sector 101 in a spot manner. FIG.
(B) shows the location where the radius sectors 104 and 105 are further overlaid so as to overlap each other.

[0115] Such variously arranged sector arrangements can be appropriately set by the input / output unit including the antenna and the like, and the power, the direction, the angle, and / or the shape and the like are dynamically set as described above.・ Can be changed.

It is to be noted that the narrow-angle or small-radius sector may be overlayed not only on one wide-angle or large-radius sector but on a plurality of sectors. Also, the present invention can be applied to cells that are not divided into sectors by appropriately overlaying narrow-angle or small-radius sectors.

[0117]

As described above, according to the radio communication method and the radio communication apparatus of the present invention, the following remarkable effects can be obtained.

(1) In the area where the N-sector (narrow angle sector) is overlaid in the W-sector (wide angle sector), the capacity increases by an amount corresponding to the transmittable power (however, the overlay 1 area) Is equivalent to the maximum capacity when operated in one sector). Therefore, W
By setting one or a plurality of N-sector overlay areas in a sector, the capacity in the W-sector can be increased spatially.

(2) Since the W-sector and the N-sector operate at the same frequency and use the same code channel in synchronization, the inter-sector identification is not performed even though the number of sectors is increased. In the case of multi-sector, the capacity for the overhead due to the necessary handoff is not required.

(3) In the W-sector, it is sufficient to transmit the power corresponding to the traffic other than the area where the N-sector is overlaid with the minimum power necessary to cover the service area. Reduction and power saving can be achieved.

(4) The direction of the N-sector can be dynamically set by using the position registration data and the position information of the wireless terminal together.

(5) By using signal systems such as orthogonal polarization and circular polarization in W-sector and N-sector, diversity functions such as polarization / space / frequency diversity can be applied to specific users. And the line quality can be improved.

(6) Except for the antenna and the high-frequency circuit, the present invention can be realized by using exactly the same device as that used in the multi-sector system. Further, a diversity function can be added.

(7) It can be easily applied to the second generation mobile communication system.

[0125]

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a wireless communication system according to the present invention.

FIG. 2 is an explanatory diagram of a frame configuration and power distribution.

FIG. 3 is a configuration diagram of a wireless terminal receiving system.

FIG. 4 is a configuration diagram of a base station transmission system.

FIG. 5 is a configuration diagram of a base station receiving system.

FIG. 6 is an explanatory diagram of a geographical distribution of system capacity.

FIG. 7 is a configuration diagram of a control function for each line of the base station according to the present invention.

FIG. 8 is a configuration diagram of a base station transmission system having a polarization transmission function.

FIG. 9 is an explanatory diagram of a second embodiment relating to an overlay.

FIG. 10 is an explanatory diagram of a third embodiment relating to an overlay.

FIG. 11 is a configuration diagram of a conventional wireless communication system.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 base station 2 communication line 3 base station controller 4 exchange 5-7 wide-angle sector 8,9 narrow-angle sector 71 signal distribution unit 72 channel element reception system 73 signal synthesis unit 74 channel element transmission system 75 control unit

Claims (20)

[Claims] 1. A cell is divided into one or a plurality of wide-angle sectors, and one or a plurality of narrow-angle sectors are partially overlaid on one or a plurality of said wide-angle sectors, wherein said wireless terminal is located. For radio signals in the wide-angle sector and / or the narrow-angle sector, for each radio line set between the radio terminal and the base station, assign a radio signal with the same code in each sector, One or more received signals from each sector in which the wireless terminal is located are demodulated and received by the same code, and for each wireless line, a transmission signal to each sector in which the wireless terminal is located is denoted by the same code. A wireless communication method of modulating and transmitting. 2. A CDM between a wireless terminal and a cellular base station.
A (Code Division Multiple Access) is a wireless communication method for performing communication via a wireless line, wherein one cell is divided into one or more wide-angle sectors, and one or more narrow-angle sectors are divided into one or more wide-angle sectors. For the radio signals in the wide-angle sector and / or the narrow-angle sector in which the radio terminal is located, the same code and the same phase spread code in each sector are provided for each CDMA radio line. And allocating radio signals with chip-level synchronization, and for each CDMA radio line, recognizes one or more received signals from each sector in which the radio terminal is located as a multipath and uses the same spreading code Demodulation and spread demodulation, rake combining and reception, and for each of the CDMA radio lines, each cell in which a radio terminal is located. The transmission signal to the motor, and modulated by the same spreading code,
A wireless communication method for transmitting using the space diversity function. 3. The wireless communication device according to claim 1, further comprising a downlink power control function for extracting a downlink power control bit received from the wireless terminal and controlling transmission power based on the downlink power control bit. Communication method. 4. A down-counter which monitors received power from a wireless terminal for each sector to obtain an estimated power, and controls transmission power distribution to each sector according to the obtained estimated power for each sector. The wireless communication method according to claim 1, further comprising a link power control function. 5. An uplink power for demodulating a received signal from a wireless terminal to estimate a bit energy versus noise power density, and setting an uplink power control bit in a transmission signal according to the estimated bit energy versus noise power density. The wireless communication method according to claim 1, further comprising a control function. 6. Allocating the transmission power in the wide-angle sector and the narrow-angle sector such that the ratio of the total transmission power to the power of the overhead channel or all radio signals or all CDMA channels is substantially the same. The wireless communication method according to claim 1, wherein: 7. The transmission power is allocated in the wide-angle sector and the narrow-angle sector such that the ratio of the power of each overhead channel to the power of all transmission power or all radio signals or all CDMA channels is substantially the same. The wireless communication method according to any one of claims 1 to 5, wherein: 8. A function of collecting location information of a wireless terminal based on a signal received from the wireless terminal and / or a function of calculating a traffic distribution of each sector based on the location information of the wireless terminal.
A function to set the direction, angle and / or shape of each sector; and, for an area with a large number of wireless terminals and / or traffic, the direction, angle and / or shape of the narrow angle sector and / or the wide angle sector. The wireless communication method according to any one of claims 1 to 7, further comprising a function of controlling the setting. 9. The radio communication method according to claim 1, wherein the wide-angle sector and the narrow-angle sector are a large radius sector and a small radius sector, respectively. 10. The transmission system according to claim 1, further comprising a radio signal having different polarization planes transmitted to said wide-angle sector and said narrow-angle sector, and further having a diversity function for a transmission signal or a reception signal. The wireless communication method according to any one of the above. 11. An input / output unit for forming one or a plurality of wide-angle sectors obtained by dividing one cell, and one or a plurality of narrow-angle sectors partially overlapping one or a plurality of said wide-angle sectors. Control for allocating a radio signal with the same code in each sector for a radio signal in the wide-angle sector and / or the narrow-angle sector where the radio terminal is located, for each radio line set between the radio terminal and the base station A channel element receiving system that demodulates and receives one or a plurality of received signals from each sector in which the wireless terminal is located by the same code, for each wireless line, and for each wireless line, A radio communication apparatus comprising: a channel element transmission system that modulates a transmission signal to each of the located sectors with the same code and transmits the modulated signal. 12. A CDMA (Code Divisi) with a wireless terminal.
on Multiple Access) a wireless communication device that performs communication by a wireless line, wherein one or a plurality of wide-angle sectors obtained by dividing one cell and one or a plurality of the wide-angle sectors partially overlaid on one or a plurality of the wide-angle sectors A plurality of receiving high-frequency units for receiving radio signals in a narrow-angle sector; a signal distribution unit for converting received signals from the plurality of receiving high-frequency units into digital signals and distributing the digital signals; A control unit for allocating a radio signal in a sector and / or the narrow-angle sector, using the same code and the same phase spread code in each sector and synchronizing with a chip level for each CDMA radio line. And one or more received signals from each sector in which the wireless terminal is located for each of the CDMA wireless lines. And a channel element receiving system having a demodulator that performs information demodulation and spread demodulation by the same spreading code and performs rake combining and reception, and a decoder that decodes a received signal. In, the transmission signal to each sector where the wireless terminal is located, modulated by the same spreading code,
A modulator that transmits by the spatial diversity function, a channel element transmission system having an encoder that encodes transmission information, and a signal combining unit that superimposes a transmission signal formed by the channel element transmission system for each sector, A wireless communication device comprising: a transmitting-side high-frequency unit that performs high-frequency conversion on an output from the signal combining unit and transmits the converted signal using the wide-angle sector and the narrow-angle sector. 13. The channel element receiving system includes means for extracting a downlink power control bit received from a wireless terminal, wherein the channel element transmitting system includes a gain section for increasing or decreasing transmission power, and the downlink power control. The wireless communication device according to claim 11, further comprising: a power control unit configured to control downlink power by the gain unit based on a bit. 14. The channel element receiving system includes means for monitoring received power from a radio terminal for each sector to obtain an estimated power, wherein the channel element transmitting system includes a gain unit for increasing or decreasing the transmission power; 13. The power control unit according to claim 11, further comprising: a power control unit that controls downlink power distribution to each sector by the gain unit according to the obtained estimated power for each sector. Wireless communication device. 15. The channel element receiving system further comprises means for modulating a received signal from a wireless terminal to extract a bit energy versus noise power density, and wherein the channel element transmitting system comprises a means for extracting the extracted bit energy versus noise. 15. The wireless communication apparatus according to claim 11, further comprising a sensor that sets an uplink power control bit in a transmission signal according to a power density. 16. In a wide angle sector and a narrow angle sector,
The transmission power is allocated such that the ratio of each total transmission power to the power of an overhead channel or all radio signals or all CDMA channels is substantially the same. Wireless communication device. 17. In a wide angle sector and a narrow angle sector,
The ratio of the power of each overhead channel to the power of the total transmit power or all radio signals or all CDMA channels is
16. The wireless communication apparatus according to claim 11, wherein transmission power is distributed so as to be substantially equal. 18. A means for collecting location information of a wireless terminal based on a reception signal from a wireless terminal and / or a means for calculating a traffic distribution of each sector based on the location information of the wireless terminal; And means for setting the shape, and means for controlling the direction, angle and / or shape of the narrow angle sector and / or the wide angle sector in an area with a large number of wireless terminals and / or traffic. The wireless communication device according to any one of claims 11 to 17, further comprising: 19. The radio communication apparatus according to claim 11, wherein said wide angle sector and said narrow angle sector are a large radius sector and a small radius sector, respectively. 20. The transmission apparatus according to claim 11, further comprising a radio signal having different polarization planes transmitted to the wide-angle sector and the narrow-angle sector, and further having a diversity function for a transmission signal or a reception signal. A wireless communication device according to any one of claims 1 to 3.