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

• US 20080064434A1
• Filed: 10/31/2007
• Published: 03/13/2008
• 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 7,876,730 B2
• Time in Patent Office: Days
• US Class Current: 455/550.1
• 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 receiver used in a mobile radio communication system employing a CDMA method, wherein a transmitter (1) of said mobile radio communication system transmits a plurality of frames in a normal mode and a plurality of compressed frames in a compressed mode during a first frame transmission period, which is formed of plural frames, performs interleaving of data to be transmitted in bit units, and said first frame transmission period is defined as a period required to transmit a predetermined number of frames, said receiver comprises:

a radio frequency receiver (25), to which said compressed frames received by an antenna are inputted, for monitoring a frequency component in a control channel within an idle period in each of said compressed frames within said first frame transmission period, wherein said control channel has a second transmission period which is employed in a different mobile radio communication system, and each of said compressed frames has an idle period, and each of said compressed frames is divided into two divided parts such that one of the divided parts is allocated at the beginning of a frame period and the other one of said divided parts is allocated at the end of said frame period.

2. A mobile radio communication method used in a receiver (2) for a CDMA system, wherein a transmitter (1) of said mobile radio communication system transmits a plurality of frames in a normal mode and a plurality of compressed frames in a compressed mode during a first frame transmission period, which is formed of plural frames, and said first frame transmission period is defined as a period required to transmit a predetermined number of frames, performs interleaving of data to be transmitted in bit units,

said mobile radio communication method comprises:

receiving said compressed frames within said first frame transmission period, each of said compressed frames having an idle period and being divided into at least two parts such that one of said divided frames is allocated at the beginning of a frame period and the other one of said divided parts is allocated at the end of said frame period; and

monitoring a frequency component in a control channel within said idle period in each of said compressed frames, wherein said control channel has a second frame transmission period which is employed in a different mobile radio communication system.