JP2738084B2 - Phase adjustment method - Google Patents

Abstract

PURPOSE:To perform phase adjustment with the minimum number of base facilities by performing the phase adjustment between only sectors after completing the phase adjustment between a neighboring zone and one sector. CONSTITUTION:A reception part 34 for phase adjustment in a radio zone RZ1 receives P-CH outgoing signals from the sectors RZ1-1 to RZ1-3 and a radio zone RZ2, and outputs a P-CH outgoing reception input signal (j) to a phase adjustment control part 31 for sector control. Then, phase difference between the radio zone RZ2 and the sector RZ1-1 is measured, and the phase difference is set at a delay quantity setting part in the phase adjustment control part 31 for sector control, and a wave outputted from the antenna of the sector RZ1-1 is fitted in the radio zone RZ2, and the output of the sectors RZ1-2 and RZ1-1 are adjusted similarly. Also, the same operation between the sectors RZ1-1 and RZ1-3 is applied, thereby, delay adjusting quantity corresponding to each sector in the phase adjustment control part 31 for sector control can be set. In such a way, the phase adjustment can be performed with the minimum number of facilities.

Description

The present invention relates to a phase adjustment method in a mobile communication system having a multi-zone configuration.

[Conventional technology]

The mobile communication system includes one radio network controller and a plurality of radio base stations. Further, in this mobile communication system, the area covered by one radio base station is divided into a plurality of sectors. In such a case, the phase adjustment between the sectors and between the zones of the P-CH downlink signal (the incoming call control signal) transmitted simultaneously and sequentially is performed.

An example of this phase adjustment method is shown in FIG. As shown in FIG. 5, a P-CH signal generation section 71 outputs a P-CH downlink signal t with blank MBS information (base station information) to a phase adjustment control section 81 of each radio zone RZ1, RZ2. Is done. The phase adjustment control unit 81 includes a P-CH downlink signal u to which MBS information has been added.
And P-CH signal transmission / reception unit TX (transmitter) on / off signal v
Output to the P-CH signal transmission / reception unit 82. Also, when there are a plurality of P-CHs in the entire system, the phase adjustment receiving unit frequency designation signal w is output to the phase adjusting receiving unit 83. The P-CH signal transmitting / receiving unit 82 transmits the P-CH downlink signal to each wireless zone.

The phase adjustment receiving section 83 of the wireless zone RZ1 receives the P-CH downlink signal of each wireless zone. Then, receiving section 83 of wireless zone RZ1 outputs P-CH downlink reception input signal x to phase adjustment control section 81.

As described above, in the conventional phase adjustment method, phase adjustment equipment is provided in each of the multi-zones, and phase adjustment between adjacent zones is performed.

[Problems to be solved by the invention]

In the above-described conventional phase adjustment system, a receiver for phase adjustment of the phase adjustment equipment, a phase adjustment control circuit, and the like are installed in each zone. Therefore, as the number of zones decreases, the number of phase adjustment equipment increases, and the installation cost increases.

An object of the present invention is to provide a phase adjustment method capable of eliminating such disadvantages and performing phase adjustment with minimum equipment.

[Means for solving the problem]

The present invention divides a zone covered by one radio base station of a mobile communication system composed of one radio network controller and a plurality of radio base stations into a plurality of sectors, and from the radio network controller to the radio base station. In a phase adjustment method of performing phase adjustment between sectors and between zones of a control signal to be transmitted, one radio base station is selected from radio base stations that communicate with the radio base stations divided into the plurality of sectors, The phase of the control signal of the selected zone of the radio base station and the control signal of one of the divided sectors are adjusted, and the control signal of the sector whose phase has been adjusted and the control of the other sector are adjusted. It is characterized in that the phase with the signal is adjusted respectively.

〔Example〕

Next, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram showing an example of a mobile communication system for implementing the present invention. In FIG. 1, the mobile communication system is composed of one radio network controller and a plurality of radio base stations, and is a case where an area covered by one radio base station is divided into a plurality of sectors. That is,
In this mobile communication system, the radio zone RZ1 has a sector RZ1−
It comprises a wireless base station divided from 1 to RZ1-3 and an adjacent wireless zone RZ2.

Also, in this communication system, the P-
The P-CH downlink signal a simultaneously transmitted from the CH signal generator 11 to each station has the configuration shown in FIG. That is, P-
The CH signal a includes the radio network controller information M and the radio zone RZ1.
And the radio zone RZ of the first sector
1, the radio base station information R1-2 of the second sector and the radio zone R
Radio base station information R1-3 of the third sector of Z1 and radio zone
RZ2 information R2.

In this communication system, the P-CH signal
The P-CH signal includes a transmission path between the control station and the base station, and a circuit unit of the base station, that is, a sector control phase adjustment control unit 31, a phase adjustment control unit 21, and P-CH signal transmission and reception units 22, 32. , the delay difference between passing a high frequency switching unit 33 _1, 33 _2, 33 _3, when fired from the antenna is never matching phases at 4 root joint. Therefore, in the case where the area covered by one radio base station is divided into a plurality of sectors, phase adjustment between sectors and between zones of P-CH downlink signals transmitted simultaneously and sequentially is performed.

That is, the P-CH downlink signal a with blank MBS information is
It is input to the sector control phase adjustment control unit 31 of the wireless zone RZ1 and the phase adjustment control unit 21 of the wireless zone RZ2.

The phase adjustment control unit 21 of the radio zone RZ2 converts the P-CH downlink signal b with the MSB information added thereto and the P-CH signal transmission / reception unit TX on / off signal c shown in FIG. Output to the transmission / reception unit 22. P-CH signal transmitting / receiving section 22 transmits a P-CH downlink signal. Further, when there are a plurality of P-CHs in the entire system, the phase adjustment control unit 21
Is output to the phase adjustment receiving section 23. Phase adjustment receiver 23
Outputs the P-CH downlink reception input signal e to the phase adjustment control unit 21.

On the other hand, the phase adjustment controller 3 for sector control of the radio zone RZ1
When the P-CH downlink signal a is input, the P-CH downlink signal f to which MBS information is added and the P-CH signal transmission / reception unit TX on / off signal g shown in FIG. It outputs to the CH signal transmission / reception unit 32. In addition, the sector control phase adjustment control unit 31 includes a high frequency switching unit on / off signal h ₁ , h ₂ ,
h ₃ RF switching unit 33, respectively _1, 33 and outputs the _2, 33 _3. Further, when there are a plurality of P-CHs in the entire system, the sector control phase adjustment controller 31 outputs the phase adjustment receiver frequency designation signal i to the phase adjustment receiver.

When the P-CH downlink signal f and the P-CH signal transceiver TX on / off signal g are input, the P-CH signal transmission / reception section 32 converts the P-CH downlink signal k to the high frequency switching sections 33 ₁ , 33 _2. and outputs it to the 33 _3. The high-frequency switching units 33 ₁ , 33 ₂ , and 33 ₃ generate P- based on the high-frequency switching unit on / off signals h ₁ , h ₂ , and h _3.
Transmit CH down signal.

The phase adjustment receiving unit 34 of the radio zone RZ1 is provided with a sector RZ1−
1, the P-CH downlink signals from RZ1-2, RZ1-3, and the radio zone RZ2 are received, and the P-CH downlink reception input signal j is output to the sector control phase adjustment controller 31.

As a result, the phase difference between the wireless zones RZ2 and RZ1-1 is measured using the phase adjustment receiving unit 34 and the sector control phase adjustment control unit 31. Then, the phase difference is set in the delay amount setting unit in the sector control phase adjustment control unit 31, and the radio wave emitted from the antenna of the sector RZ1-1 is adjusted to the radio zone RZ2. Next, the outputs of the sectors RZ1-2 and RZ1-1 are similarly adjusted. At this time, using the signal line 35 of the sector control phase adjustment control unit 31, the sectors RZ1-1 and RZ1 shown in FIG.
Only at each timing of -2, control is performed such that the radio base station information of the P-CH downlink signal via the P-CH signal transmitting / receiving unit 32 is transmitted. Hereinafter, similarly, between the sectors RZ1-1 and RZ1-3, the delay adjustment amount corresponding to each sector in the sector control phase adjustment controller 32 is set.

Thus, at the stage of reducing the wireless zone, 1
When the omni zone covered by the wireless base station is divided into sectors using multiple directional antennas, a high-frequency switching unit is provided in the wireless base station equipment for the sector, and the P-CH downlink signal is used for the sector. The transmission on / off control is performed, and a phase is adjusted by receiving a radio wave in a time slot corresponding to a sector which is sequentially transmitted.

That is, in a mobile communication system including one radio network controller and a plurality of radio base stations, P-CHs transmitted simultaneously and sequentially in a case where an area covered by one radio base station is divided into a plurality of sectors. When adjusting the phase of the downlink signal between the sectors and between the zones, a high-frequency switching unit is prepared particularly for each sector to adjust the phase synchronization.

FIG. 3 is a block diagram showing another example of a mobile communication system for implementing the present invention. FIG. 3 shows a case where the mobile communication system includes one radio network controller and a plurality of radio base stations and divides an area covered by one radio base station into a plurality of sectors. That is, in this mobile communication system, the radio zone RZ1 is RZ1-1.
To RZ1 to RZ1-3, and an adjacent wireless zone RZ2.

Also, in this communication system, the P-
The P-CH downlink signal a simultaneously transmitted from the CH signal generator 11 to each station has the configuration shown in FIG. That is, P-
The CH signal a includes the radio network controller information M and the radio zone RZ1.
And the radio zone RZ of the first sector
1, the radio base station information R1-2 of the second sector and the radio zone R
Radio base station information R1-3 of the third sector of Z1 and radio zone
RZ2 information R2.

In this communication system, the P-CH signal
The P-CH signal includes a transmission path between the control station and the base station and a circuit section of the base station, that is, a sector control phase adjustment control section 41, a phase adjustment control section 21, and a P-CH signal transmission / reception section 22, 42 ₁ and ~42 _3, P-CH
Downlink signal common transmitting unit 43 and sector-compatible antenna sharing unit 44
The delay difference between passing and _{1-44 3,} when emitted from the antenna is never matching phases at 4 root joint. Therefore, in the case where the area covered by one radio base station is divided into a plurality of sectors, phase adjustment between sectors and between zones of P-CH downlink signals transmitted simultaneously and sequentially is performed.

That is, the P-CH downlink signal a with blank MBS information is
The data is input to the sector control phase adjustment control unit 41 of the wireless zone RZ1 and the phase adjustment control unit 21 of the wireless zone RZ2.

The phase adjustment control unit 21 of the radio zone RZ2 converts the P-CH downlink signal b to which MBS information is added and the P-CH signal transmission / reception unit TX on / off signal c shown in FIG. Output to the transmission / reception unit 22. P-CH signal transmitting / receiving section 22 transmits a P-CH downlink signal. Further, when there are a plurality of P-CHs in the entire system, the phase adjustment control unit 21
Is output to the phase adjustment receiving section 23. Phase adjustment receiver 23
Outputs the P-CH downlink reception input signal e to the phase adjustment control unit 21.

On the other hand, the phase adjustment controller 4 for sector control of the radio zone RZ1
1, when the P-CH downlink signal a is input, the P-CH downlink signal m to which MBS information is added and the P-CH signal transmission / reception unit TX on / off signals n ₁ , n shown in FIG. ₂ and n ₃ are P-CH signal transmitting and receiving units 42 ₁ ,
And outputs the 42 _2, 42 _3. Further, the sector control phase adjustment controller 41 outputs the on / off signal p shown in FIG. 4 to the P-CH downlink common signal transmitter 43. Furthermore, when there are a plurality of P-CHs in the whole system, the sector control phase adjustment control unit 41 outputs the phase adjustment receiving unit frequency designation signal q to the phase adjusting receiving unit 45.

The P-CH signal transmission / reception units 42 ₁ , 42 ₂ , and 42 ₃ transmit the P-CH downlink signal m and P
-When the CH on / off signal TX on / off signals n ₁ , n ₂ , n ₃ are respectively input, the P-CH downlink signals r ₁ , r ₂ , r ₃ are converted into sector-compatible antenna duplexers 44 ₁ , 44 _{2 respectively.} and outputs it to the 44 _3. Also PC
H downstream signal common transmission unit 43, the on / off signal p is input, and outputs the P-CH downlink common unit information signal s to the sector corresponding antenna duplexer 44 _1, 44 _2, 44 _3.

Antenna sharing unit 44 ₁ , 44 ₂ , 44 for each sector
₃ transmits a P-CH downlink signal based on the P-CH downlink common section information signal s.

The phase adjustment receiving unit 45 of the wireless zone RZ1 is
It receives P-CH downlink signals from Z1-1, RZ1-2, RZ1-3, and RZ2, and outputs a P-CH downlink reception input signal o to the sector control phase adjustment controller 41.

As a result, the phase difference between the sectors RZ2 and RZ1-1 is measured using the phase adjustment reception unit 45 and the sector control phase adjustment control unit 41. Then, the phase difference is set in the delay amount setting unit in the sector control phase adjustment control unit 41, and the radio wave emitted from the antenna of the sector RZ1-1 is adjusted to the radio zone RZ2. Next, between the sectors RZ1-1 and RZ1-2 and between the sectors RZ1-1 and RZ1-3, the signal line 46 from the sector control phase adjustment control unit 41 is used as shown in FIG. By utilizing the fact that station information is sequentially transmitted, the phase is adjusted by measuring the phase difference of the base station information.

As described above, when the omni zone covered by one radio base station is divided into sectors using a plurality of directional antennas at the stage of reducing the zone, the P-CH downlink common A transmitting unit and a sector-compatible antenna duplexer are prepared. Then, P-CH downlink common transmission data and base station information data for each sector are integrated by a duplexer and transmitted in each sector, and after phase adjustment between adjacent zones and one sector, the Perform phase adjustment only.

That is, in a mobile communication system including one radio network controller and a plurality of radio base stations, P-CHs transmitted simultaneously and sequentially in a case where an area covered by one radio base station is divided into a plurality of sectors. When phase adjustment between sectors of the downlink signal and between zones is performed, a P-CH downlink signal common transmitting unit and a sector duplexer are prepared in the sectorized base station, and phase synchronization is adjusted.

〔The invention's effect〕

As described above, the present invention has an effect that the phase adjustment can be performed with a minimum number of base facilities when performing the zone division in the sector system.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an example of a mobile communication system for carrying out the present invention, FIG. 2 is a diagram showing signals of the mobile communication system of FIG. 1, and FIG. FIG. 4 is a block diagram showing another example of the mobile communication system of FIG. 3, FIG. 4 is a diagram showing each signal of the mobile communication system of FIG. 3, and FIG. It is. 11 P-CH signal generation unit 21 Phase adjustment control unit 22, 32 P-CH signal transmission / reception unit 23 Phase adjustment reception unit 31 Sector control phase adjustment control unit 33 _{1 to} 33 ₃ ...... Switching part for high frequency

Claims (1)

(57) [Claims] A mobile communication system comprising one radio network controller and a plurality of radio base stations divides a zone covered by one radio base station into a plurality of sectors. In the phase adjustment method for adjusting the phase of the control signal transmitted between the sectors and between the zones, one radio base station is selected from radio base stations communicating with the radio base stations divided into the plurality of sectors. Adjusting the phases of the control signal of the selected zone of the radio base station and the control signal of one of the divided sectors; and the control signal of the sector whose phase has been adjusted and the control signal of the other sector. A phase adjustment method for adjusting a phase with a control signal.