Device and method for time-division multiple access radio communication

• US 6,515,982 B1
• Filed: 11/18/1999
• Issued: 02/04/2003
• Est. Priority Date: 11/20/1998
• Status: Expired due to Term

• Current Assignee: Godo Kaisha IP Bridge 1 (IP Bridge, Inc.)
• Original Assignee: Matsushita Electric Industrial Company Limited (Panasonic Holdings Corporation)
• Inventors: Hagiwara, Yasunori
• Primary Examiner(s): Urban, Edward F.
• Assistant Examiner(s): MILORD, MARCEAU
• Application Number:
  US09/443,234
• Time in Patent Office: 1,174 Days
• Field of Search: 370/347, 370/348, 370/337, 370/314, 370/349, 370/350, 370/346
• US Class Current: 370/347
• CPC Class Codes: H04B 7/2643 using time-division multiple access [TDMA] H04B7/2615, H04B7/2618 take precedence
• CPC Class Codes: H04L 1/1854 Scheduling and prioritising arrangements
• CPC Class Codes: H04L 69/28 Timers or timing mechanisms used in protocols
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

The present invention reduces power consumption and costs for components, and improves acknowledgement speed by using a memory or the like used only for acknowledgement. A time-division multiple access radio communication device of the present invention includes a receive-data buffer portion for storing received data; a unique word detecting portion for detecting a unique word from the received data; a timer portion for counting time from the point at which the unique word is detected at the unique word detecting portion; a cyclic redundancy check (CRC) calculating portion for checking errors in the received data; and a send-data buffer portion for storing data to be sent. The time-division multiple access radio communication device is further provided with an acknowledgement data generating portion. The acknowledgement data generating portion checks errors in the received data based on the calculation effects at the CRC calculating portion in accordance with the timing counted at the timer portion, and when the received data are assumed to be error-free, the acknowledgement data generating portion automatically generates acknowledgement data, and stores the data in a storage region distinguished from the send-data buffer portion.

Claims

1. A time-division multiple access radio communication device comprising:

a receiving-data buffer portion to receive data from plural sources by using a carrier wave and to store the received data;

a unique word detecting portion to detect a unique word from the received data to determine a synchronous point as a starting point for timing adjustment;

a timer portion for the timing adjustment by counting time from the point that the unique word is detected at the unique word detecting portion;

a cyclic redundancy check (CRC) calculating portion to check errors in the received data; and

a send-data buffer portion to store the data to be sent;

wherein an acknowledgement data generating portion is further provided, the acknowledgement data generating portion checking errors in the received data based on a calculation result at the CRC calculating portion, and when the data are assumed to be error-free, the acknowledgment data generating portion generating acknowledgement data and sending to a send-data processing path, while at all other times sending stored data from the send-data buffer portion to a send-data path by switching.

2. The time-division multiple access radio communication device according to claim 1, wherein the receive-data buffer portion receives plural receive-data slots and the acknowledgement data slots, the send-data buffer portion sends plural send data slots and the acknowledgement data slots.

3. A time-division multiple access radio communication method comprising the steps of:

receiving data from plural sources by using a carrier wave and storing the data;

detecting a unique word from the received data in order to determine a synchronous point as a starting point for timing adjustment;

counting time from the point that the unique word is detected;

carrying out CRC calculation for checking errors in the received data; and

storing the data to be sent, wherein the method further comprising the steps of;

checking errors in the received data based on the CRC calculation result;

generating acknowledgment data when the received data are assumed to be error-free; and

sending to a send-data processing path, while at all other times sending stored data from the send-data buffer portion to a send-data path by switching.