JP2001211115A - Radio communication terminal and method for measuring level at radio communication terminal - Google Patents

Abstract

PROBLEM TO BE SOLVED: To periodically measure the levels of its own station channel and a peripheral channel when packet communication service is used. SOLUTION: A control circuit when receiving a physical channel for packet communication discriminates a synchronizing word of the physical channel for packet communication to discriminate a superframe (step S2), and measure the levels of its own station channel and peripheral channel using the cycle shown in the superframe unit as measurement cycle (step S6). Even when the packet communication service is used, measurement is carried out in the cycle shown by the superframe unit as the measurement cycle to periodically measure the levels of its own station channel and adjacent channel, thereby making zone shifting accurate.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a radio communication terminal for measuring the levels of its own channel and peripheral channels by identifying channels, and a method of measuring the level in a radio communication terminal.

[0002]

Conventionally, wireless communication terminals such as mobile telephone terminals and car telephone terminals have been widely used. By the way, this type of wireless communication terminal needs to perform level measurement of its own channel and peripheral channels in order to accurately execute zone transition.

[0003] In this case, when using a circuit-switched communication service, the wireless communication terminal receives a "broadcast information" message from the wireless communication network and identifies an information element of "control channel structure information". Thus, the number of slots in the superframe can be identified. By specifying the slots, the level measurement of the own station channel and the peripheral channels is periodically performed using the cycle indicated by the slot as a measurement cycle. It becomes possible.

In recent years, a wireless communication network for providing a packet communication service has been provided. Accordingly, the wireless communication network has been used together with a data terminal (for example, a notebook personal computer) and a data card.
A wireless communication terminal capable of performing packet communication is provided. However, in this case, if the wireless communication terminal uses a packet communication service, even if it receives a “broadcast information” message from the wireless communication network,
There is a situation that it is impossible to identify the number of slots in a superframe. For this reason, it is difficult for the wireless communication terminal to periodically measure the level of the local station channel and the peripheral channels, and as a result, it is difficult to accurately perform the zone shift.

[0005] The present invention has been made in view of the above circumstances, and an object of the present invention is to make it possible to periodically measure the level of its own channel and peripheral channels when using a packet communication service. Accordingly, it is an object of the present invention to provide a wireless communication terminal and a method of measuring a level in the wireless communication terminal, which can execute a zone shift accurately.

[0006]

According to the radio communication terminal of the present invention, when the control unit receives the physical channel for packet communication, the control unit identifies the synchronization word of the physical channel for packet communication to thereby control the super frame. , And the levels of the local station channel and the peripheral channels are measured using the cycle indicated in superframe units as a measurement cycle.

That is, according to this, when a physical channel for packet communication is received, a superframe is identified by identifying a synchronization word of the physical channel for packet communication, and a cycle indicated in superframe units is measured as a measurement cycle. As the level of the local station channel and the peripheral channel is measured, even when using a packet communication service, the local station channel and the peripheral channel are measured by measuring the cycle indicated in a superframe unit as a measurement cycle. The level measurement of the peripheral channel can be periodically performed, and thereby the zone shift can be accurately performed.

According to the second aspect of the present invention, when a packet communication physical channel is received, a super frame is identified by identifying a synchronization word of the packet communication physical channel, and a super frame is identified. The level of the local station channel and the peripheral channels is measured using the cycle indicated in frame units as the measurement cycle.

That is, according to this, when a physical channel for packet communication is received, a superframe is identified by identifying a synchronization word of the physical channel for packet communication, and a cycle indicated in superframe units is measured as a measurement cycle. As the level of the local station channel and the peripheral channel is measured, even when using a packet communication service, the local station channel and the peripheral channel are measured by measuring the cycle indicated in a superframe unit as a measurement cycle. The level measurement of the peripheral channel can be periodically performed, and thereby the zone shift can be accurately performed.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the present invention is applied to a portable telephone terminal will be described below with reference to the drawings. First, FIG. 2 schematically shows a usage mode of a mobile phone terminal. A mobile phone terminal 1 and a data terminal 2 (in FIG. 2,
In a notebook personal computer), the 16-core connector 4 at one end of the connection cable 3
The data communication becomes possible by mounting the data card 6 on the other end side of the connection cable 3 into the data card slot 7 of the data terminal 2 while being mounted on the core slot 5.

In this case, the data card 6 provides a modem interface to the data terminal 2, whereby the data terminal 2 provides a packet communication service through the mobile phone terminal 1 by dial-up connection. It becomes possible to connect to the provided packet communication network 8, and packet communication becomes possible.

FIG. 3 schematically shows an electric configuration of the portable telephone terminal 1. In the mobile phone terminal 1, the control circuit 9 (control means in the present invention) is mainly composed of a microcomputer, and includes a radio circuit 10, a voice input / output circuit 11, a key operation identification circuit 12, a display control circuit 13, Each circuit of the external terminal connection circuit 14 and the memory 15 are connected.

According to such a configuration, the microphone 1
6, when a transmission voice is input from outside, the input transmission voice is converted from a voice signal to an electric signal to generate a transmission signal, and the voice input / output circuit 11 receives the transmission signal from the microphone 16 and outputs the input signal. When the transmission signal is input from the audio input / output circuit 11 through the control circuit 9, the wireless circuit 10 wirelessly processes the input transmission signal and outputs it to the antenna 17.
Receives a transmission signal from the wireless circuit 10 and converts the input transmission signal into a predetermined communication frequency band (for example, 800 MHz).
Band).

In the radio circuit 10, the antenna 17 captures a radio wave in a predetermined communication frequency band (for example, 800 MHz band) as a received radio wave.
When a received radio wave is input from the controller, the input received radio wave is wirelessly processed to generate a received signal. When the received signal is input from the wireless circuit 10 through the control circuit 9, the input received signal is subjected to audio processing. Then, when receiving a signal from the voice input / output circuit 11, the receiver 18 converts the input received signal from an electric signal to a voice signal to generate a received voice, and outputs the generated received voice to the outside.

When a user operates a key and inputs a key operation signal from the keypad 19, the key operation identification circuit 12 identifies the input key operation signal and outputs a key operation identification signal indicating the key operated by the user. Is output to the control circuit 9, and when the key operation identification signal is input from the key operation identification circuit 12, the control circuit 9 decodes the input key operation identification signal.

The display control circuit 13 includes a control circuit 9
When a display command is input from the CPU, display information is displayed on the display 20 in accordance with the input display command. The external terminal connection circuit 14 has an interface with the data terminal 2 as an external terminal, and controls data communication between the control circuit 9 and the data terminal 2. Then, the control circuit 9
Various processes are executed by executing the control program.

Next, the operation of the above configuration will be described with reference to FIG.
This will be described with reference to the flowchart shown in FIG.
In the portable telephone terminal 1, when receiving the physical channel for packet communication, the control circuit 9 identifies a synchronization word of the physical channel for packet communication (step S1).

When the control circuit 9 identifies the head of the super frame by identifying the synchronization word of the physical channel for packet communication, it determines "YES" in step S2, and determines the value of the counter for measuring its own channel level. The count value and the count value of the peripheral channel level measurement counter are initialized (step S3), and a level measurement timer is started (step S4, see t0 in FIG. 4). Here, the control circuit 9 sets 720 ms corresponding to the frame length of one superframe as the timer value.

Next, when the control circuit 9 recognizes that the timer has expired, the control circuit 9 determines "Y" in step S5.
ES ”, the levels of the own station channel and the peripheral channel are measured (step S6), and the count value of the own station channel level measurement counter and the count value of the peripheral channel level measurement counter are incremented (step S7, FIG. 4 t1).

At this time, the control circuit 9 compares the count value of the counter for measuring the channel level of the own station with the specified value for measuring the channel level of the own station (step S8). Is greater than the specified value for measuring the channel level of the own station, "YES" is determined in step S8, and the average value of the level of the own station channel measured earlier than this is calculated (step S8).
9).

The control circuit 9 compares the count value of the peripheral channel level measurement counter with a specified value for peripheral channel level measurement (step S10), and determines that the count value of the peripheral channel level measurement counter is equal to the peripheral channel level. If it exceeds the specified value for measurement, "YES" is determined in step S10, and the average value of the levels of the peripheral channels measured earlier than this is calculated (step S10).
11).

Then, the control circuit 9 restarts the level measurement timer (step S12), and returns to step S12.
5 and thereafter, the same processing as described above is performed (see t2 to tn in FIG. 4).

In the above description, by setting the timer value to 720 milliseconds corresponding to the frame length of one superframe, the time corresponding to the frame length of one superframe as shown in FIG. Is described as the measurement period, but by setting the timer value to 1440 milliseconds corresponding to the frame length of two superframes, the time corresponding to the frame length of the two superframes can be reduced. It can be a measurement cycle,
By setting the timer value to 2160 milliseconds, which corresponds to the frame length of three superframes, it is possible to use the time corresponding to the frame length of three superframes as the measurement period. That is, by setting the timer value to (720 × n) milliseconds corresponding to the frame length of n (n is a natural number) superframes, the time corresponding to the frame length of the n superframes is defined as the measurement period. It is possible to

Further, it is possible to initialize the count value of the own station channel level measurement counter and the count value of the peripheral channel level measurement counter, and at the same time, measure the levels of the own station channel and the peripheral channel.

As described above, according to this embodiment,
When a physical channel for packet communication is received, a superframe is identified by identifying a synchronization word of the physical channel for packet communication, and the level of the local station channel and peripheral channels is set using the cycle indicated in superframe units as a measurement cycle. Measured. As a result, even when using the packet communication service,
By measuring the cycle indicated by the superframe unit as the measurement cycle, the level measurement of the own station channel and the peripheral channels can be periodically performed, and the zone shift can be accurately performed.

The present invention is not limited to the above embodiment, but can be modified or expanded as follows. The wireless communication terminal is not limited to a mobile phone terminal, and may be a car phone terminal, or may be another terminal having a telephone function. The data terminal is not limited to a notebook personal computer, but may be another type.

[Brief description of the drawings]

FIG. 1 is a flowchart showing control contents according to an embodiment of the present invention.

FIG. 2 is a diagram schematically showing a usage pattern of a mobile phone terminal.

FIG. 3 is a functional block diagram showing an electrical configuration.

FIG. 4 is a diagram showing an operation.

[Explanation of symbols]

In the drawings, 1 is a mobile phone terminal (wireless communication terminal), and 9 is a control circuit (control means).

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Tomohiko Hasebe 2-10-1 Toranomon, Minato-ku, Tokyo NTT Mobile Communications Network Co., Ltd. F-term (reference) 5K028 BB04 KK03 PP04 PP11 5K042 AA06 CA13 DA16 FA11 JA01 5K067 AA26 AA33 BB04 BB21 CC08 DD25 EE02 EE10 EE71 GG11 HH21 HH22 JJ35 LL11

Claims (2)

[Claims] 1. A wireless communication terminal comprising control means for measuring a level of a local station channel and a peripheral channel by identifying a channel, wherein the control means, when receiving a physical channel for packet communication, A radio communication terminal characterized in that a superframe is identified by identifying a synchronization word of a communication physical channel, and the level of a local station channel and a peripheral channel is measured using a cycle indicated in superframe units as a measurement cycle. 2. A method for measuring the level of a local station channel and a peripheral channel by identifying a channel, the method comprising: measuring a level of a packet communication physical channel when receiving a packet communication physical channel; A level measuring method in a radio communication terminal, comprising: identifying a superframe by identifying a synchronization word; and measuring a level of a local station channel and a peripheral channel using a cycle indicated in units of a superframe as a measurement cycle.