JPH04336818A - Radio communication equipment - Google Patents

Abstract

PURPOSE:To reduce a waiting time being a frequency setting time to a negligible degree by driving individually and sequentially plural PLLs so as to set a transmission/reception frequency continuously. CONSTITUTION:A CPU 1 sends a 10ch setting data (a 1st setting data) to a 1st PLL 2a and sends a PLL selective signal to the selector 3 so that the output of the selector 3 is an output from the 1st PLL 2a thereby, awaiting channel setting of the 1st PLL 2a. On the other hand, 1ch, 2ch used succeedingly are respectively set to 2nd and 3rd PLLs 2b, 2c for a time till the channel setting of the 1st PLL 2a is finished. That is, a 1ch setting data being a 2nd setting data and a 2ch setting data being a 3rd setting data are set respectively to the 2nd PLL 2b and 3rd PLLs 2b, 2c being 1ch, 2ch channel setting data.

Description

[Detailed description of the invention]

0001

[Industrial Application Field] The present invention relates to a wireless communication device, more specifically a phase lock loop.
The present invention relates to a wireless communication device in which transmitting and receiving frequencies are set using a PLL (hereinafter referred to as "PLL").

0002

2. Description of the Related Art Conventional wireless communication devices generally use one or a set of PLLs to set transmitting and receiving frequencies (hereinafter referred to as "channels").

[0003] In this type of wireless communication device, as shown in FIG. 5, after a channel is set by a PLL, data is transmitted and received using the channel.
After data transmission and reception are completed, the next channel to be used is set again by the PLL.

[0004] In this manner, conventional wireless communication devices can efficiently set many channels by using one or one set of PLLs.

[0005]

[Problems to be Solved by the Invention] However, as mentioned above, while the conventional wireless communication device has the advantage of being able to set many channels with one PLL, due to the characteristics of the PLL, one empty Since it takes time to detect a channel, there is a drawback that it takes too much time to complete one channel setting. Moreover, since the next channel setting is started after data transmission/reception is completed, there is a drawback that there is a considerable waiting time before data transmission/reception starts (in Figure 5, the transmission/reception time is t1, the waiting time is (denoted as t2). The waiting time t2 causes the following problems. That is, (1) This waiting time prevents the base station (base station) from increasing its processing capacity. (2) In the case of a communication system dedicated to data communication, the transmission and reception time is extremely short compared to that of a voice system, so the waiting time when setting a channel is so large that it cannot be ignored. (3) This wasted waiting time generates wasted current consumption in battery-powered wireless terminals, which affects battery life. There were problems such as.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a wireless communication device that can perform wireless communication with higher efficiency.

[0007]

[Means for Solving the Problems] In order to achieve the above object, the present invention provides a wireless communication device in which transmitting/receiving frequencies are set using PLLs, which includes a plurality of PLLs, and individually controls the plurality of PLLs. It is characterized in that it has a setting means that sequentially sets the transmitting and receiving frequencies by sequentially driving the transmitting and receiving frequencies.

Furthermore, the wireless communication device is characterized in that different transmission and reception frequencies are individually set for the plurality of PLLs.

[0009]

[Operation] According to the above configuration, multiple PLLs are individually and sequentially driven to successively set the transmitting and receiving frequencies, so it is possible to shorten the waiting time when setting the frequency to a negligible level. .

Furthermore, since different transmitting and receiving frequencies are individually set for a plurality of PLLs, it is possible to perform wireless communication using different transmitting and receiving frequencies.

[0011]

[Embodiments] Hereinafter, embodiments of the present invention will be explained in detail based on the drawings.

FIG. 1 is a block diagram showing an embodiment of a wireless communication device according to the present invention.

In the figure, 1 is a CPU that performs predetermined channel control, 2a, 2b, 2c are first to third PLLs that set channels, and 3 are first to third PLLs 2a to 2c.
This is a selector that selects the output from the communication device and issues an output signal to the other party's communication device.

The first to third PLLs 2a to 2c are all composed of the same components, and specifically, as shown in FIG. 2, they include a PLL main body 4 that compares the phases of input signals, and Low pass filter to attenuate
s filter (hereinafter referred to as "LPF") 5, and a VCO (Voltage-controller) that performs channel settings.
olled oscillator) 6.

[0015] Therefore, the first to third PLLs 2a to 2c
, channel data is input to the PLL main body 4 via a line 7 along with a strobe signal in synchronization with a predetermined clock signal, and this channel data is sent to a VCO 6 after its low frequency range is cut by an LPF 5. on the other hand,
Transmission data is input to VCO 6 via line 8. Then, in VCO 6, channel settings are made,
Transmission data is modulated in accordance with the channel.

Next, the VCO 6 outputs modulated data obtained by modulating the transmission data, while the modulated data is output from the PL
After confirming that the modulated data is stabilized, the PLL main body 4 outputs a channel lock signal via the line 9. As a result, the first to third PLL2
Outside of a to 2c, it is recognized that the channel setting is completed.

[0017] In the wireless communication device configured in this way,
In FIG. 1, for example, CPU1 is 10ch, 1ch, 2c
If we use these channels in order h, then CP
U1 sends 10ch setting data (first
setting data), and then the output of selector 3 is
A PLL selection signal is sent to the selector 3 so as to be output from the first PLL 2a, and the channel setting of the first PLL 2a is waited for. On the other hand, during the time until the channel setting of the first PLL 2a is completed, the channels 1ch and 2c to be used next are
h is set in the second and third PLLs 2b and 2c, respectively.

That is, 1ch which is the second setting data
and the third setting data, 2ch setting data, are transferred to the second PLL 2b and the third PLL 2, respectively.
Sequentially send to c, 1ch to 2nd and 3rd PLL 2b, 2c
, 2ch.

By setting the channels of the three PLLs individually and sequentially in pipeline processing in this way,
As shown in FIG. 3, after the use of channel 10ch set by the first PLL 2a is completed (transmission/reception time is indicated by T1 in the figure), the waiting time T2 is reached for channel 1ch set by the second PLL 2b. Can be used continuously with almost no use. Furthermore, as described above, channel 2ch can be used continuously after channel 1ch is used with almost no waiting time T2. Furthermore, even after the transmission and reception by the channel 10 set by the first PLL 2a is completed, for example, the third PLL 2c
By using the transmission/reception time of channel 2ch set by , the first PLL 2a can again set the channel to be used next, and it is possible to further improve efficiency.

In this way, in the above embodiment, a plurality of P
By using the LL effectively, the waiting time (pause time during which transmission and reception cannot be performed) that occurs when setting the PLL can be suppressed to a negligible level. Therefore, it is possible to significantly increase the number of times that data can be transmitted and received, and the amount of data that can be transmitted and received accordingly.

FIG. 4 is a block diagram of a wireless communication device showing another embodiment, in which a PLL control section 10 is provided and the PLL control section 10 is provided.
By performing channel control in the LL control unit 10, the CPU
This is aimed at reducing the burden of 11.

That is, the setting data from the CPU 11 is transmitted to the PLL control section 1 which is controlled based on the PLL selection signal.
0, the first to third PLLs 2a to 2
Setting data is input to any one PLL of c, and the same channel setting as described above is performed.

By reducing the load on the CPU 11 in this way, a more efficient environment can be realized.

[0024]

As explained above, the present invention provides a wireless communication device in which transmitting and receiving frequencies are set using phase-locked circuits, which includes a plurality of phase-locked circuits, and individually controls the plurality of phase-locked circuits. Since it has a setting means that sequentially drives and sets the transmitting and receiving frequencies continuously, the time required for switching the transmitting and receiving frequencies can be made selfless, and the following effects are achieved. (1) Since the ratio of actual data transmission and reception time increases, unnecessary waiting time is eliminated, power consumption can be saved, and execution speed can be significantly improved. (2) This wasted waiting time can be diverted to the original work, and especially at the base station (master unit), the handset mobile station (slave unit)
The number of devices that can be managed increases significantly. (3) P, which was a bottleneck in improving the system's ability
By being freed from the waiting time during LL setting, system upgrades can be easily performed.

Furthermore, in the present invention, since different transmitting and receiving frequencies are set individually for a plurality of phase synchronized circuits,
Wireless communication can be performed using different transmitting and receiving frequencies sequentially with almost no waiting time.

[Brief explanation of the drawing]

FIG. 1 is a block configuration diagram showing an embodiment of a wireless communication device according to the present invention.

FIG. 2 is a block diagram showing the internal structure of a phase locked loop (PLL).

FIG. 3 is a time chart showing the relationship between channel settings, transmission/reception time, and waiting time.

FIG. 4 is a block configuration diagram showing another embodiment.

FIG. 5 is a time chart of a conventional example.

[Explanation of symbols]

Claims (2)

[Claims] 1. A wireless communication device in which a frequency for transmission and reception is set using a phase-locked circuit, comprising a plurality of phase-locked circuits, and a frequency for transmission and reception is continuously set by sequentially driving the plurality of phase-locked circuits individually. What is claimed is: 1. A wireless communication device characterized by comprising a setting means for setting. 2. The wireless communication device according to claim 1, wherein different transmission and reception frequencies are individually set for the plurality of phase synchronized circuits.