JPS60170343A - Selectively called receiving device - Google Patents

Abstract

PURPOSE:To make battery saving suitable for the kind of calls, by providing a ROM which stores common calling numbers and individual calling numbers under a discriminated condition. CONSTITUTION:The ROM11 of a selectively called receiving device stores individual calling numbers, common calling numbers, and information bits for discriminating individual calling and common calling from each other. An address signal processing section 5 selectively controls one of plural operating timings held by a battery saving circuit 8 in advance by means of a signal which discriminate whether a collated calling member is individual one or common one. Therefore, suitable battery saving can be performed correspondingly to the kind of calls.

Description

DETAILED DESCRIPTION OF THE INVENTION FIELD OF THE INVENTION The present invention relates to a selective call receiving device capable of making individual calls and common calls.

Conventional configuration and problems In order for the selective call receiving device to always be able to identify selective calls from the base station, the receiver and the circuit for detecting the called number must be operated at all times. . However, since such a method consumes a large amount of power, battery saving methods have been developed. A typical example is POC3AG (PoC3AG) disclosed in CCIR code A1.
st OfficeCode 5tanderdisa
tion advisory (7roup) code, but in conventional communication systems that employ this PQCS AG code, it is difficult to effectively send and receive common message data across groups divided for battery saving purposes. I couldn't.

OBJECTS OF THE INVENTION It is an object of the present invention to provide a selective call receiving device that eliminates the drawbacks of the above-mentioned conventional examples and that can perform both individual calls and common calls, and that can perform battery saving in accordance with the type of call. shall be.

Structure of the Invention In order to achieve the above object, the present invention includes a read-only memory storing at least one individual calling number and a common calling number, and compares a received signal with a plurality of calling numbers obtained from the memory. When a target call signal is received, a plurality of selective call receiving devices are provided with a pantry saving timing when detecting a message signal sent subsequently using an individual call number and a common call number.
- This provides the effect that multiple selective call receiving devices can receive the same message at the same time (so-called group call).

DESCRIPTION OF THE EMBODIMENTS The configuration of an embodiment of the present invention will be described below with reference to the drawings. First, Fig. 1 shows the group call signal transmission method and battery saving.

This will be explained using FIG.

FIG. 1 shows the basic operation of battery saving when an individual paging signal is received. The signal configuration in FIG. 1 is the same as the conventional POC8AG code. After the receiving device is synchronized with the base station's transmission signal and the synchronization signal (SC), it operates the receiving circuit only in frames in which the synchronization signal and its own paging signal may be sent, and operates the receiving circuit at other times. turns off most circuits to reduce power consumption. Each of the seven frames consists of an address signal and a message signal. #φ to #7 are frame types, and the receiving device is divided into one of eight groups in advance.

A1 to A8 are individual calling signals, and M1 to M8 are message signals. B indicates the timing of battery saving of the receiving device belonging to frame notification φ, C indicates the timing of battery saving of the receiving device belonging to frame notification 3, and D indicates the timing of battery saving of the receiving device belonging to frame 3 and the individual call number is A8. It shows. The message signal is sent following the address signal.

FIG. 2 shows the basic operation of battery saving when a common calling number is received. A.

When sending a common message signal, a synchronization signal and 16 same common call numbers are inserted in one batch, and the message signal is sent in the next batch. B belongs to frame φ and C belongs to frame /26.3, but it shows the battery saving timing of a receiving device that does not have a common calling number Ao. It is the same timing as.

B' and C' are the common calling number A. It shows the timing of battery saving of the receiving device after waiting for the common calling number A. When this message is detected, unlike when an individual call number is detected, the message data is received and processed at a timing that continues from the M, 44φ frame of the next batch.

FIG. 3 is a block diagram of a selective call receiving device in one embodiment of the present invention. Reference numeral 1 denotes an antenna, and 2 a radio receiving section, which has an input terminal from a switch 9 for controlling the power supply. 3 is a bit synchronization circuit, 4 is a frame synchronization circuit, 6 is an address signal processing section, 6 is a message signal processing section, and 7 is a display processing section, which includes a display such as a liquid crystal (not shown).

8 is a battery saving circuit, 9 is a switch, 10 is a power source, and 11 is a read-only memory (ROM), which contains at least one individual calling number and one common calling number, and identifies whether the number is individual or common. Additional information bits are stored.

Next, the operation will be explained. A signal received by the antenna 1 and the radio receiving section 2 is synchronized between the base station and the receiving device by a bit synchronization circuit 3, and a synchronization signal is detected by a frame synchronization circuit 4, thereby establishing synchronization of battery saving.

When the battery saving synchronization is established, the battery saving circuit transmits the signal to the wireless receiving unit 2 via the switch 9 only at the timing of the synchronization signal and its own frame.
is connected to the power supply 10 and is supplied with electricity. Data in the ROM 11 is read into the address signal processing section 6.

The address signal processing unit 6 compares the signal received only during the period of its own frame with the individual calling number and the common calling number, and if they match, the battery saving function determines which of the common calling signals the individual calling number matches. Inform circuit 8. In response to this, the pantry saving circuit 8
It controls the operation timing of the wireless receiving section 2 and message signal processing section 6. and mesosage signal processing section 6
The message signal is processed by the display processor 7 and displayed on a liquid crystal display (LCD).

One of the points in which the embodiment of the present invention is different from the conventional selective call receiving device is that the common call number is stored in the ROM 11 while being distinguished from the individual call number. It has an information bit that identifies whether the number is a common calling number. Another difference is that
In the address signal processing unit 6, B, B' in FIG.
C.

As shown in C', one of the plurality of operation timings that the battery saving circuit 8 has in advance is selectively controlled.

Effects of the Invention As explained in the second embodiment, according to the present invention, the ROM of the selective call receiving device includes an individual call number, a common call number, and an information bit for identifying the individual call and the common call. It is efficient because it can save the battery in an appropriate mode from a plurality of battery saving modes depending on the type of call, and can be used for other purposes such as providing weather forecast stock information, etc. It has the advantage of enabling new information services.

[Brief explanation of the drawing]

Figure 1 is a time chart explaining the basic operation of battery saving when receiving an individual calling number, Figure 2 is a time chart explaining the basic operation of battery saving when receiving a common calling number, and Figure 3 is a time chart explaining the basic operation of battery saving when receiving a common calling number. FIG. 1 is a block diagram of a selective call receiving device according to an embodiment of the present invention. 1...Antenna, 2...Radio receiving section,
3...Bit synchronization circuit, 4...Frame synchronization circuit, 6...Address signal processing section, 6.
...Message signal processing unit, 7...Display processing section, 8...Battery saving circuit, 9
...Switch, 1o...Power supply, 11...
...ROM0 Name of agent Patent attorney Toshio Nakao and 1 other person S
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Claims (1)

[Claims] a read-only memory storing at least one individual calling number, a common calling number and information bits identifying whether said call is an individual call or a common call; A battery saving circuit that performs digital signal processing compares the received signal from the base station with the plurality of calling numbers read from the memory to determine whether or not the calling number is for one purpose. A selective call receiving device comprising means for distinguishing between individual calls and common calls and switching the battery saving circuit.