MOBILE RADIO COMMUNICATION SYSTEM, COMMUNICATION APPARATUS APPLIED IN MOBILE RADIO COMMUNICATION SYSTEM, AND MOBILE RADIO COMMUNICATION METHOD

• US 20070189331A1
• Filed: 04/19/2007
• Published: 08/16/2007
• Est. Priority Date: 04/23/1998
• Status: Active Grant

• Current Assignee: Mitsubishi Denki Kabushiki Kaisha (Mitsubishi Electric Corporation)
• Original Assignee: Mitsubishi Denki Kabushiki Kaisha (Mitsubishi Electric Corporation)
• Inventors: Murai, Hideshi, Yano, Yasuhiro, VOYER, Nicolas
• Granted Patent: US 7,899,430 B2
• Time in Patent Office: Days
• US Class Current: 370/470
• CPC Class Codes: H04B 7/2634 for channel frequency control
• CPC Class Codes: H04B 7/2656 for structure of frame, burst
• CPC Class Codes: H04L 1/004 by using forward error control H04L1/0618 takes precedence; coding, decoding or code conversion, for error detection or correction H03M13/00
• CPC Class Codes: H04L 1/0071 Use of interleaving interleaving per se H03M13/27
• CPC Class Codes: H04W 24/00 Supervisory, monitoring or testing arrangements
• CPC Class Codes: H04W 24/10 Scheduling measurement reports ; Arrangements for measurement reports
• CPC Class Codes: H04W 36/00 Hand-off or reselection arrangements
• CPC Class Codes: H04W 36/0085 Hand-off measurements
• CPC Class Codes: H04W 36/0088 Scheduling hand-off measurements
• CPC Class Codes: H04W 36/1443 between licensed networks
• CPC Class Codes: H04W 52/267 taking into account the information rate
• CPC Class Codes: H04W 52/44 in connection with interruption of transmission
• CPC Class Codes: H04W 72/12 Wireless traffic scheduling
• CPC Class Codes: H04W 72/54 based on quality criteria
• CPC Class Codes: H04W 84/04 Large scale networks; Deep hierarchical networks
• CPC Class Codes: H04W 88/06 adapted for operation in multiple networks or having at least two operational modes, e.g. multi-mode terminals

Abstract

In the mobile radio communication system where the UMTS and an another system coexist an idle slot for observing the frequency component of another system is inserted in one superframe of UMTS. The duration of this idle slot is at most half of the duration of one frame that form the superframe and it is inserted at an interval of a specified number of frames. Therefore, the frequency component of the another system can be observed securely from the UMTS. Further, deterioration of interleaving performance of the compressed mode frames during such observation can be suppressed.

Claims

1. A mobile radio communication method employed in a mobile radio communication system, the mobile communication system including a first and second communication system;

the first communication system employing a code division multiple access method and including

a transmitter for transmitting a first frame comprising a predetermined number of slots and having a first frame-length (Li), at a first transmission period which is defined as a period required to transmit a first specified number of the first frames; and

a receiver for receiving the frame transmitted by the transmitter; and

the second communication system for transmitting a second frame having a second frame-length (L2), employing a GSM method where the second frame is transmitted at a second transmission period which is defined as a period required to transmit a second specified number of the second frames and not an integer-times of the first transmission period, the second communication system coexisting with the first communication system, the mobile radio communication method comprising the steps of;

transmitting the first frame from the transmitter in the first communication system to the receiver in the first communication system, the transmitting step including substeps of

setting a plurality of idle periods within the first transmission period by compressing a plurality of the first frames within the first transmission period,

determining an idle period interval, the idle period interval being expressed by a number of slots and defined as an interval between corresponding portions in an idle period and in one of other idle periods, such that the idle period interval corresponds to an odd-number times of a value obtained by dividing the second frame-length (L2) by a predetermined even number, and

transmitting the first frames, including the idle periods which are placed at the determined idle period interval, to the receiver in the first communication system; and

observing a control data transmission channel in the second communication system during the idle periods at the receiver in the first communication system

wherein one of the compressed first frames is divided into a first portion and a second portion, the first portion including a front edge of the frame timing and the second portion including a rear edge of the frame timing.

2. The mobile radio communication method according to claim 1, wherein, in the transmitting step the transmitter in the first communication system

sets P pieces of idle periods each having a half or less length of the first frame-length within the first transmission period, where P is an even number;

and

determines the idle period interval, expressed by the number of slots, such that the idle period interval approximates a value of (L2/P)×

(P×

n+1), where n is a natural number.

3. A mobile radio communication method employed in a transmitter included in a first communication system in a mobile radio communication system that includes the first communication system and a second communication system;

the first communication system employing a code division multiple access method and including

the transmitter for transmitting a first frame comprising a predetermined number of slots and having a first frame-length (Li), at a first transmission period which is defined as a period required to transmit a first specified number of the first frames and

a receiver for receiving the frame transmitted by the transmitter; and

the second communication system for transmitting a second frame having a second frame-length (L2), employing a GSM method where the second frame is transmitted at a second transmission period which is defined as a period required to transmit a second specified number of the second frames and not an integer-times of the first transmission period, the second communication system coexisting with the first communication system, the mobile radio communication method including the step of;

transmitting the first frames to the receiver in the first communication system, the transmitting step including substeps of

setting a plurality of the idle periods within the first transmission period by compressing a plurality of the first frames within the first transmission period,

determining an idle period interval, the idle period interval being expressed by a number of slots and defined as an interval between corresponding portions in an idle period and in one of the other idle periods, such that the idle period interval corresponds to an odd-number times of a value obtained by dividing the second frame-length (L2) by a predetermined even number, and

transmitting the first frames, including the idle periods which are placed at the determined idle period interval, to the receiver in the first communication system, which observes a control data transmission channel in the second communication system during the idle periods

wherein one of the compressed first frames is divided into a first portion and a second portion, the first portion including a front edge of the frame timing and the second portion including a rear edge of the frame timing.

4. The mobile radio communication method according to claim 3, wherein, in the transmitting step the transmitter in the first communication system

sets P pieces of idle periods each having a half or less length of the first frame-length within the first transmission period, where P is an even number;

and

determines the idle period interval, expressed by the number of slots, such that the idle period interval approximates a value of (L2/P)×

(P×

n+1), where n is a natural number.

5. A mobile radio communication system, comprising;

a first communication system employing a code division access method and including

a transmitter for transmitting a first frame comprising a predetermined number of slots and having a first frame-length (Li), at a first transmission period which is defined as a period required to transmit a first specified number of the first frames; and

a receiver for receiving the frame transmitted by the transmitter, and

a second communication system for transmitting a second frame having a second frame-length (L2), employing a GSM method where the second frame is transmitted at a second transmission period which is defined as a period required to transmit a second specified number of the second frames and not an integer-times of the first transmission period, the second communication system coexisting with the first communication system, wherein the transmitter in the first communication system is configured

to set a plurality of idle periods within the first transmission period by compressing a plurality of the first frames within the first transmission period;

to determine an idle period interval, the idle period interval being expressed by a number of slots and defined as an interval between corresponding portions in an idle period and in one of the other idle periods, such that the idle period interval corresponds to an odd-number times of a value obtained by dividing the second frame-length (L2) by a predetermined even number, and

to transmit the first frames, including the idle periods which are placed at the determined idle period interval, to the receiver in the first communication system, and

the receiver in the first communication system is configured to observe a control data transmission channel in the second communication system during the idle periods,

wherein one of the compressed first frames is divided into a first portion and a second portion, the first portion including a front edge of the frame timing and the second portion including a rear edge of the frame timing.

6. The mobile radio communication system according to claim 5, wherein the transmitter in the first communication system is configured to

set P pieces of idle periods each having a half or less length of the first frame-length within the first transmission period, where P is an even number, and determine idle period interval, expressed by the number of slots, such that the idle period interval approximates a value of (L2/P)×

(P×

n+1), where n is a natural number

7. A transmitter included in a first communication system in a mobile radio communication system that includes the first communication system and a second communication system;

the first communication system employing a code division multiple access method and including

the transmitter for transmitting a first frame comprising a predetermined number of slots and having a first frame-length (Li), at a first transmission period which is defined as a period required to transmit a first specified number of the first frames; and

a receiver for receiving the frame transmitted by the transmitter; and

the second communication system for transmitting a second frame having a second frame-length (L2), employing a GSM method where the second frame is transmitted at a second transmission period which is defined as a period required to transmit a second specified number of the second frames and not an integer-times of the first transmission period, the second communication system coexisting with the first communication system, wherein

the transmitter is configured

to set a plurality of idle periods within the first transmission period by compressing a plurality of the first frames within the first transmission period,

to determine an idle period interval, the idle period interval being expressed by a number of slots and defined as an interval between corresponding portions in an idle period and in one of other idle periods, such that the idle period interval corresponds to an odd-number times of a value obtained by dividing the second frame-length (L2) by a predetermined even number, and

to transmit the first frames, including the idle periods which are placed at the determined idle period interval, to the receiver in the first communication system, which observes a control data transmission channel in the second communication system during the idle periods,

wherein one of the compressed first frames is divided into a first portion and a second portion, the first portion including a front edge of the frame timing and the second portion including a rear edge of the frame timing.

8. The transmitter according to claim 7, wherein the transmitter is configured to

set P pieces of idle periods each having a half or less length of the first frame-length within the first transmission period, where P is an even number, and

determine the idle period interval, expressed by the number of slots, such that the idle period interval approximates a value of (L2/P)×

(P×

n+1), where n is a natural number.