CDMA/TDD mobile communication system and method

• US 20030195007A1
• Filed: 04/22/2003
• Published: 10/16/2003
• Est. Priority Date: 03/10/1998
• Status: Active Grant

• Current Assignee: INVT SPE LLC (FIG LLC (d/b/a Fortress Investment Group LLC))
• Original Assignee: Matsushita Electric Industrial Company Limited (Panasonic Holdings Corporation)
• Inventors: Hayashi, Masaki, Hiramatsu, Katsuhiko, Ue, Toyoki, Miya, Kazuyuki
• Granted Patent: US 6,973,065 B2
• Time in Patent Office: Days
• US Class Current: 455/450
• CPC Class Codes: H04B 7/2643 using time-division multiple access [TDMA] H04B7/2615, H04B7/2618 take precedence
• CPC Class Codes: H04J 13/10 Code generation
• CPC Class Codes: H04W 24/10 Scheduling measurement reports ; Arrangements for measurement reports
• CPC Class Codes: H04W 52/143 Downlink power control
• CPC Class Codes: H04W 52/146 Uplink power control
• CPC Class Codes: H04W 52/16 Deriving transmission power values from another channel
• CPC Class Codes: H04W 52/58 Format of the TPC bits
• CPC Class Codes: H04W 56/00 Synchronisation arrangements
• CPC Class Codes: H04W 56/0085 detecting a given structure in the signal
• CPC Class Codes: H04W 72/0446 Resources in time domain, e.g. slots or frames
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal
• CPC Class Codes: H04W 74/04 Scheduled access hybrid access H04W74/02
• CPC Class Codes: H04W 88/08 Access point devices

Abstract

Control section 125 at base station 100 in a CDMA/TDD mobile communication system assigns one or more fixed forward link time slots to a plurality of time slots divided at a communication frame at a predetermined interval, and forward link time slots and reverse link time slots to the time slots except for the fixed forward link time slots by allocating corresponding to a ratio of a total information volume of a forward link to a total information volume of a reverse link in the system, in order to transmit a control channel signal including a synchronization control channel signal using the fixed forward link time slots, and to transmit forward link and reverse link traffic channel signals using the forward link time slots and the reverse link time slots that are allocated according to the number of time slots respectively required corresponding to the respective information volume.

Claims

1. A base station apparatus in a CDMA/TDD communication system that employs a communication frame divided into a plurality of time slots, each of which is assigned one of a forward link and a reverse link of the communication system, the base station apparatus comprising:

an assignor that assigns a forward link common control channel to position fixed time slots disposed at regular intervals among the plurality of time slots; and

a controller that assigns a forward link user information channel, to time slots other than time slots immediately following the position fixed time slots, and that assigns a reverse link user information channel to time slots other than the position fixed time slots and the time slots assigned to the forward link user information channel.

2. The base station apparatus of claim 1, the forward link common control channel comprising a synchronization control channel.

3. The base station apparatus of claim 1, wherein said assignor assigns the common control channel to position fixed time slots that are disposed at every other time slot.

4. A CDMA/TDD communication method that employs a communication frame divided into a plurality of time slots, each of which is assigned to one of a forward link and a reverse link, the method comprising:

assigning a forward link common control channel to position fixed time slots disposed at regular intervals among the plurality of time slots;

assigning a forward link user information channel to time slots other than time slots immediately following the position fixed time slots; and

assigning a reverse link user information channel to time slots other than the position fixed time slots and the time slots assigned to the forward link user information channel.

5. A base station apparatus in a communication system that employs a communication frame divided into a plurality of time slots, each of which is assigned one of a forward link and a reverse link of the communication system, the base station apparatus comprising:

an assignor that assigns a forward link common control channel to position fixed time slots regularly spaced every predetermined number of time slots; and

a controller that assigns a forward link user information channel, to time slots other than time slots immediately following the position fixed time slots, and that assigns a reverse link user information channel to time slots other than the position fixed time slots and the time slots assigned to the forward link user information channel.

6. The base station apparatus of claim 5, the forward link common control channel comprising a synchronization control channel.

7. The base station apparatus of claim 5, wherein the predetermined number of time slots comprises two time slots.

8. The base station apparatus of claim 5, wherein the predetermined number of time slots comprises four time slots.