JPH0535623B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a data receiving method for a data receiver that receives and decodes serial data, and more particularly, to a data receiving method that takes into account battery saving of a mobile terminal.

Low power consumption is always required for mobile terminals that communicate with wireless base stations by receiving calls from them or making calls themselves.
Battery saving is especially necessary for portable mobile terminals that operate only on battery power.

A mobile terminal that makes a call via a wireless base station or the like usually monitors whether or not there is a call from the wireless base station. This call signal has a format as shown in FIG. 1, for example, and has an error correction function.

In order to decode such signals, the entire decoder may be constructed of hard logic, or the decoder may be decoded by a program using a microcomputer.

Figure 2 shows an example of the former.If the signal is synchronized by the bit synchronization circuit and the frame synchronization circuit, and if there is a correctable error in the signal by the error correction circuit, the signal is normalized and then S-P conversion is performed. A circuit converts serial data into parallel data. FIG. 3 shows an example of the latter, in which everything except bit synchronization is dependent on the microcomputer. however,
In the case of a method in which decoding is performed using only hard logic, as shown in FIG. 2, the circuit itself is not flexible to changes, so it lacks versatility, and has the disadvantage that separate circuits must be prepared for each signal format. Also,
Unlike the case of FIG. 2, the method using a microcomputer shown in FIG. 3 has the disadvantage that although it has versatility, it consumes a large amount of power.

Therefore, conventionally, as a battery saving method for a circuit adopting such a data receiving method, there is a method of dividing the paging signals sent from the base station into, for example, N groups. In this method, mobile devices are also divided into N groups,
A paging signal is repeatedly sent out in cycles of N groups, and the mobile terminal turns on the power and decodes the signal once every N groups just before its own group is called. In this way, the decoder only needs to be powered on for 1/N time to enable battery saving.

Although this data reception method is an improvement only from the viewpoint of battery saving, it imposes restrictions on the base station paging method, making base station control complicated, and
New problems arise, such as connection delays.

The purpose of the present invention is to overcome the above drawbacks by combining a microcomputer decoding method with hard logic, and is capable of data reception with low power consumption, no system restrictions, and flexibility in data decoding. The goal is to provide a method.

In order to achieve the above object, a data receiving system according to the present invention is a data receiving system for a data receiver that receives and decodes serial data. a memory section that stores serial data following a synchronization pattern based on the synchronization notification from the detection circuit; a control circuit that starts bit counting based on the synchronization information from the synchronization pattern detection circuit and detects when all one signal has been received; The microcomputer stops operating until all signals are input to the memory, and the microcomputer decodes one signal from the memory section in response to an operation request from the control circuit after inputting one signal. The device is configured to read out and decode the data, and then send a standby request to the control circuit when the operation is to be stopped.

That is, the present invention is comprised of a synchronization pattern detection section, a memory for storing one signal, a control circuit for detecting whether all one signal has been received, and a microcomputer for decoding the signal. Normally, microcomputers are in a non-operating state, and their power consumption is extremely low. At this time, when a synchronization pattern is detected from the serial signal, all signals for one signal are sequentially stored in the memory.
After the storage is completed, a processing request is issued to the microcomputer, and the microcomputer starts operating, takes out the stored signal from the memory, and decodes it.
At this time, power consumption is increasing. After decoding, the microcomputer again stops operating.

With this configuration, it is possible to save the power of the microcomputer, remove restrictions on base control, and provide flexibility in the decoding method.

Hereinafter, the present invention will be explained in more detail with reference to the drawings. FIG. 4 is a circuit diagram showing an embodiment of the battery saving data receiving system according to the present invention.
In the figure, 3 indicates a synchronization pattern detection section, RX indicates serial data, 5 indicates a synchronization report line, 6 indicates an operation request line, 7 indicates a data line, and 8 indicates a standby request line.

The microcomputer 1 is normally in a standby state, that is, a low power consumption state. Serial data RX
is input to a synchronization pattern detection section 3 consisting of a bit synchronization circuit and a frame synchronization circuit, and when a synchronization pattern is detected there, synchronization information is reported to the memory section 2 and the control section 4 through a synchronization notification line 5. In response to this notification, the memory unit 2 starts storing serial data following the synchronization pattern. At the same time, the control section 4 starts counting bits, and issues an operation request to the microcomputer 1 after counting one signal. When the control unit 4 counts one signal, all the data for one signal is stored in the memory unit 2, and the process has ended.

The microcomputer 1 to which an operation instruction is requested via the operation request line 6 is released from the standby state, enters the operating state, and stores the 1 stored in the memory section 2.
Read out the data for the signal via the data line 7,
Performs decoding processing of the read data. At this time, the power consumption of microcomputers is increasing.

When the microcomputer 1 finishes decoding the signal, it next reads its own ID No. (identification number) from the ID memory section 9 and compares it with the ID No. in the decoded signal.

As a result of the comparison, if it is different, it is determined that it is not the call itself, requests standby to the control unit 4 through the standby request line 8, and enters a standby state with low power consumption.

FIG. 5 shows the relationship between the calling signal and the power consumption of the microcomputer at this time.

On the other hand, if a match is detected and the microcomputer 1 determines that it is calling itself, the microcomputer 1 does not go into a standby state but goes into call connection processing. After completing the call connection process, it enters a standby state.

FIG. 6 shows the relationship between the calling signal and the power consumption of the microcomputer when it matches its own identification number.

As is clear from FIGS. 5 and 6, the microcomputer 1 is normally in a standby state and enters an operating state in which it detects the synchronization pattern of the signal, decodes it, and performs an identification operation, so that power can be saved.

As described in detail above, the present invention includes a microcomputer including a synchronization pattern detection section, a memory section,
By combining the control unit, it is possible to realize power saving for the microcomputer that decodes serial data.

[Brief explanation of drawings]

Fig. 1 is a diagram showing a paging signal to a general mobile terminal, Fig. 2 is a circuit block diagram of a conventional decoder constructed from hard logic, and Fig. 3 is a circuit diagram of a conventional decoder constructed from a microcomputer. FIG. 4 is a circuit block diagram showing an embodiment of the data receiving system according to the present invention, and FIGS. 5 and 6 are diagrams showing the relationship between the calling signal and the power consumption of the microcomputer. DESCRIPTION OF SYMBOLS 1... Microcomputer, 2... Memory section, 3... Synchronization pattern detection section, 4... Control section,
9...ID memory.

Claims (1)

[Claims] 1. In a data receiving system of a data receiver that receives and decodes serial data, there is a synchronization pattern detection circuit that detects a synchronization pattern indicating the start of a signal, and a synchronization notification from the synchronization pattern detection circuit that detects the serial data following the synchronization pattern. It consists of a memory section for storing bits, a control circuit that starts bit counting based on the synchronization information of the synchronization pattern detection circuit and detects when all one signal has been received, and a microcomputer for decoding the signal. The computer stops operating until all one signal is input to the memory, and upon receiving an operation request from the control circuit after inputting one signal, reads one signal from the memory section, decodes it, and then stops operating. A battery saving data receiving system characterized in that the battery saving data receiving system is configured to send a standby request to the control circuit.