Mobile radio communication system, communication apparatus applied in mobile radio communication system, and mobile radio communication method

• US 7,912,015 B2
• Filed: 10/31/2007
• Issued: 03/22/2011
• Est. Priority Date: 04/23/1998
• Status: Expired due to Fees

• Current Assignee: Mitsubishi Denki Kabushiki Kaisha (Mitsubishi Electric Corporation)
• Original Assignee: Mitsubishi Denki Kabushiki Kaisha (Mitsubishi Electric Corporation)
• Inventors: Voyer, Nicolas, Murai, Hideshi, Yano, Yasuhiro
• Primary Examiner(s): HO, DUC CHI
• Application Number:
  US11/931,375
• Publication Number:
  US 20080062931A1
• Time in Patent Office: 1,238 Days
• Field of Search: None
• US Class Current: 370/335
• 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 36/14 Reselecting a network or an air interface
• 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, the 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 that comprises

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

a transmitter for transmitting a first frame having a first frame-length (L1), and for transmitting a first frame, 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-multiple of the first transmission period, the second communication system coexisting with the first communication system, the mobile radio communication method including 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

setting a plurality of idle periods each having a half or less length of the first frame-length in the first transmission period;

determining an idle-period interval, 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 multiple 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 frequency component of a control data transmission channel in the second communication system during the idle periods at the receiver in the first communication system.

2. The mobile radio communication method according to claim 1, wherein,

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 such that the idle-period interval most approximates to 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, wherein the system comprises

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

the transmitter for transmitting a first frame having a first frame-length (L1), and for transmitting a first frame, 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-multiple of the first transmission period, the second communication system coexisting with the first communication system, the mobile radio communication method including 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

setting a plurality of idle periods each having a half or less length of the first frame-length in the first transmission period;

determining an idle-period interval 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 a value of an odd-number multiple 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 observing a frequency component of a control data transmission channel in the second communication system during the idle periods.

4. The mobile radio communication method according to claim 3, wherein

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

and the idle-period interval is determined such that the idle-period interval most approximates to 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 multiple access method including

a transmitter for transmitting a first frame having a first frame-length (L1), and for transmitting a first frame, 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-multiple 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 each having a half or less length of the first frame-length in the first transmission period;

to determine an idle-period interval 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 multiple 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 observing a frequency component of a control data transmission channel in the second communication system during the idle periods.

6. The mobile radio communication system according to claim 5, wherein

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 such that the idle-period interval most approximates to 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, wherein the mobile ratio communication system comprises

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

the transmitter for transmitting a first frame having a first frame-length (L1), and for transmitting a first frame, 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-multiple 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 each having a half or less length of the first frame-length in the first transmission period;

to determine an idle-period interval 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 multiple 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 observing a frequency component of a control data transmission channel in the second communication system during the idle periods.

8. The transmitter according to claim 7, wherein

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 such that the idle-period interval most approximates to a value of (L2/P)×

(P×

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

9. A mobile radio communication method employed in a receiver in a first communication system in a mobile radio communication system, wherein the mobile radio communication system comprises

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

a transmitter for transmitting a first frame having a first frame-length (L1), at a first transmission period which is defined as a period required to transmit a first specified number of the first frames;

and

the 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-multiple of the first transmission period, the second communication system coexisting with the first communication system, the mobile radio communication method including the steps of;

receiving the first frame transmitted from the transmitter in the first communication system to the receiver, wherein the transmitter in the first communication system sets a plurality of idle periods each having a half or less length of the first frame-length within the first transmission period, determines an idle-period interval 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 multiple of a value obtained by dividing the second frame-length (L2) by a predetermined even number, and

transmits the first frames including the idle periods which are placed at the determined idle-period interval to the receiver; and

observing a frequency component of a control data transmission channel in the second communication system during the idle periods.

10. The mobile radio communication method according to claim 9, wherein

the first frame received at the receiving is the frame transmitted by the transmitter in the first communication system that 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 such that the idle-period interval most approximates to a value of (L2/P)×

(P×

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

11. A receiver employed in a first communication system in a mobile radio communication system, wherein the mobile radio communication system comprises

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

a transmitter for transmitting a first frame having a first frame-length (L1), at a first transmission period which is defined as a period required to transmit a first specified number of the first frames;

and

the 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-multiple of the first transmission period, the second communication system coexisting with the first communication system, wherein

the receiver is configured to receive the first frame transmitted from the transmitter in the first communication system to the receiver, wherein the transmitter in the first communication system sets a plurality of idle periods each having a half or less length of the first frame-length within the first transmission period, determines an idle-period interval 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 multiple of a value obtained by dividing the second frame-length (L2) by a predetermined even number, and transmits the first frames including the idle periods which are placed at the determined idle-period interval to the receiver; and

observing a frequency component of a control data transmission channel in the second communication system during the idle periods.

12. The receiver according to claim 11, wherein

the first frame received by the receiver is the frame transmitted by the transmitter in the first communication system that 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 such that the idle-period interval most approximates to a value of (L2/P)×

(P×

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