JPH09200857A - Communication channel assignment system in personal handy phone system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To set a communication channel by informing idle channel information obtained by a slave set through idle channel retrieval to a master set. SOLUTION: On the occurrence of a connection request such as dialing or incoming call to a slave set 2, a microprocessor 24 retrieves an idle channel and adds a channel number and a slot designation number to a link channel setup request signal and sends the resulting signal to a master set 1 from a radio section 21. The master set 1 uses a reception level measurement circuit 13 to measure a reception level based on information of the link channel setup request signal received from the slave set 2, the microprocessor 14 selects a communication channel designated by the channel number to use a slot changeover section 12 to select the communication channel and sends the link channel assignment signal to the slave set 2. The slave set 2 receives the link channel assignment signal and uses a slot changeover section 22 to select the communication channel. Thus the communication between the master set 1 and the slave set 2 is started.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a communication channel allocating method in a simple portable telephone system (PHS), and particularly for household use in which communication is carried out between a master unit and a slave unit each composed of a 1-slot radio. The present invention relates to a communication channel allocation method in a PHS in which a master device allocates a communication channel based on a result of a free channel search process of a slave device.

[0002]

2. Description of the Related Art A free channel search process of a master unit can be easily realized by a master unit composed of a 4-slot radio, but for home use in which the master unit is composed of a 1-slot radio. In the PHS, when communication is performed between the master unit and the slave unit, if the slave unit transmits a link channel establishment request to the master unit, the master unit transmits a link channel allocation signal to the slave unit and then the master unit. Was searching for a free channel and allocating a communication channel.

FIG. 4 is a format diagram of a link channel establishment request signal in a PHS, which is a base unit of a conventional 1-slot radio.

Referring to FIG. 4, the first of the first octet
The bit to the 7th bit indicate the message type, the 2nd octet is the extended link channel (extended LCH) protocol type from the 1st bit to the 3rd bit, and the 4th and 5th bits are the link channel (LCH) protocol. The type indicates the LCH type from the sixth bit to the eighth bit, and the third octet is radio management (RT: Radio frequency) from the first bit to the third bit.
(Transmission management)
・ Movement management (MM: Mobility Management)
ent) protocol version, the 7th bit and the 8th bit indicate the call control (CC: Call Control) protocol type, and the 8th bit of the 1st octet and the 4th to 6th bits of the 3rd octet are reserved, respectively. Is shown.

The fourth octet indicates the area information notification status number from the first bit to the third bit, the reservation from the fourth bit to the eighth bit, and the fifth octet indicates the first bit and the second bit. Bits are optional.

[0006]

In this conventional PHS, there is no means for notifying the base unit of the free channel information obtained by performing the free channel search in the handset.
There is a problem in that only the base unit can set the communication channel even though the free channel is searched by both the base unit and the handset unit.

An object of the present invention is to provide a communication channel allocation method in a PHS for notifying the master unit of the information of the free channel obtained by performing a free channel search in the slave unit when the master unit is composed of a 1-slot radio. To provide.

[0008]

According to the present invention, in a home-use PHS composed of a 1-slot radio, the slave unit searches for an empty channel when the master unit communicates with the slave unit. It is characterized by performing the link channel establishment request to notify the base unit of the information of the free channel and the slot, and the base unit allocates the communication channel based on the information of the free channel notified from the handset. P
A communication channel allocation scheme in HS is obtained.

Further, the master unit switches a slot for searching a free channel in the first wireless unit and a first wireless unit for wirelessly communicating with the slave unit. Section, a reception level measuring section for measuring a reception level at the first radio section, and a first microprocessor for performing selective control of the idle channel, and the slave unit is connected to the master unit. A second wireless unit that performs wireless communication, a second slot switching unit that switches slots to search for an empty channel in the second wireless unit, and a second microprocessor that controls selection of the empty channel. It is possible to obtain a communication channel allocation system in PHS, which is characterized in that

[0010]

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

FIG. 1 is a system block diagram showing the configuration of a PHS according to an embodiment of the present invention, FIG. 2 is a format diagram of a link channel establishment request signal in FIG. 1, and FIG. 3 is a process from the empty channel search to the communication start in FIG. 3 is a sequence chart showing the operation sequence of FIG.

First, referring to FIG. 1, P of the present embodiment will be described.
The HS is composed of a base unit 1 which is a 1-slot radio unit and a handset unit 2 which communicates with the base unit 1. The base unit 1 has a radio unit 11 and an empty channel in the radio unit 11. And a reception level measuring unit 1 for measuring the reception level at the radio unit 11 for switching the slots to search for
3 and a microprocessor 14 for controlling the selection of empty channels, the handset 2 has a wireless unit 21, a slot switching unit 22 for switching the slots to search the wireless unit 21 for an empty channel, and an empty channel. And a microprocessor 24 for performing selection control.

Next, referring to FIG. 2, in the handset 2 of this embodiment, slot designation numbers are assigned to the 6th bit and the 7th bit of the 4th octet of the link channel establishment request signal, respectively.
Also, a channel number is added to the 1st to 8th bits of the 5th octet and transmitted to the master unit 1.

The fourth bit and the fifth bit of the fourth octet
A bit indicates an option, and the signal format of other octets is the same as the conventional signal format shown in FIG.

Next, the operation of this embodiment will be described with reference to FIG.

When a connection request such as an outgoing call or an incoming call is issued to the slave unit 2, the microprocessor 24 searches for an empty channel, adds the channel number and the slot designation number to the link channel establishment request signal, and the wireless unit. 21 to the base unit 1.

In the master unit 1, the reception level measuring circuit 13 measures the reception level based on the information of the link channel establishment request signal received from the slave unit 2, and further selects the communication channel designated by the channel number. Slot switching unit 1
The communication channel is switched by 2 and the link channel assignment signal is transmitted to the handset 2.

The slave unit 2 receives the link channel assignment signal from the master unit 1, and the microprocessor 24 instructs the slot switching unit 22 to switch the communication channel. As a result, communication between the master unit 1 and the slave unit 2 is started.

[0019]

As described above, according to the present invention, in a home PHS including a 1-slot radio, when the master unit communicates with the slave unit, the slave unit searches for an empty channel. The link channel establishment request notifies the parent device of the information about the empty channel and the slot, and the parent device allocates the communication channel based on the information of the empty channel notified from the child device. A first wireless unit that performs wireless communication between the first wireless unit, a first slot switching unit that switches a slot to search for an empty channel in the first wireless unit, and a reception level at the first wireless unit. A second radio unit for wirelessly communicating with the master unit, the second radio unit including a reception level measuring unit for measuring and a first microprocessor for selecting and controlling a free channel; Empty channel A second slot switching unit for switching a slot in order to perform the search, by providing a second microprocessor for selecting the control idle channel, the search processing of the available channel at the base-side is reduced, 1
This has the effect of simplifying the device configuration of the master device in the slot radio and reducing the cost.

[Brief description of drawings]

FIG. 1 is a system block diagram showing a configuration of a PHS according to an embodiment of the present invention.

FIG. 2 is a format diagram of a link channel establishment request signal in FIG.

FIG. 3 is a sequence chart showing an operation sequence from a free channel search to communication start in FIG.

FIG. 4 is a diagram showing a P that is a parent device formed by a conventional 1-slot radio device.
It is a format diagram of a link channel establishment request signal in the HS.

[Explanation of symbols]

 1 Master unit 2 Slave unit 11,21 Radio unit 12,22 Slot switching unit 13 Reception level measuring circuit 14,24 Microprocessor

Claims (2)

[Claims] 1. In a home-use simplified mobile phone system including a 1-slot radio, when a master unit communicates with a slave unit, the slave unit searches for an empty channel and makes a link channel establishment request. In the simple mobile phone system, the information of the empty channel and the slot is notified to the parent device by the device, and the parent device allocates the communication channel based on the information of the empty channel notified from the child device. Communication channel allocation method. 2. The first base unit, wherein the base unit wirelessly communicates with the base unit, and a first slot switching unit for switching slots to search for an empty channel in the first radio unit. Section, a reception level measuring section for measuring a reception level at the first radio section, and a first microprocessor for performing selective control of the idle channel, and the slave unit is connected to the master unit. A second wireless unit that performs wireless communication, a second slot switching unit that switches slots to search for an empty channel in the second wireless unit, and a second microprocessor that controls selection of the empty channel. The communication channel allocation method in the simplified mobile phone system according to claim 1, further comprising: