Method for forming frame structure for use in time division multiple access communication system

• US 6,172,971 B1
• Filed: 09/29/1997
• Issued: 01/09/2001
• Est. Priority Date: 03/31/1997
• Status: Expired due to Term

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Kim, Byung-Chul
• Primary Examiner(s): HSU, ALPUS
• Application Number:
  US08/939,211
• Time in Patent Office: 1,198 Days
• Field of Search: 370/280, 370/294, 370/337, 370/347, 370/348, 370/352, 370/642, 370/443, 370/444, 370/458, 370/459
• US Class Current: 370/348
• CPC Class Codes: H04B 7/2643 using time-division multiple access [TDMA] H04B7/2615, H04B7/2618 take precedence
• CPC Class Codes: H04J 3/1694 Allocation of channels in TDM/TDMA networks, e.g. distributed multiplexers Passive Optical Networks H04Q11/0062

Abstract

A frame structure suitable for effectively transmitting voice and data in a TDMA communication system. The TDMA communication system using the frame structure separates voice/data competition procedures, and disposes a request subslot at a leading end of every slot so as to reduce the access delay of a real-time traffic. Thus, it is possible to easily reserve the traffics, by maintaining the constant number of the request subslots. Further, the slots are first allocated to the real-time traffic, and the remaining idle slots are allocated to the non real-time traffic. Therefore, it is possible to give a priority order to a voice user and separate the voice/data contentions.

Claims

1. A method for forming a frame structure for use in a TDMA (Time Division Multiple Access) communication system, comprising the steps of:

preparing a plurality of slots on the frame;

disposing a plurality of acknowledge subslots for a down-link at a leading end of each of said slots;

determining whether generated real time traffic is voice or data;

evaluating a permission probability of the real traffic at a next request subslot;

determining whether successful reservation of a communication channel has been established;

reserving an idle slot when the real time traffic is voice and a successful reservation has been made;

allocating remaining idle slots to non-real-time traffic;

transmitting packets when the idle slot has been reserved;

determining whether the voice data has been completed; and

returning the reserved idle slot to its idle status when the voice data is complete.

2. The method according to claim 1, further comprising the steps of:

buffering the successful reservation of the communication channel to a global data queue when the real time traffic is data;

determining the presence of an idle slot;

transmitting a real time data packet when an idle slot is present;

determining whether the transmitted data packet was the last packet;

transmitting a subsequent data packet when the transmitted data packet is not the last data packet;

terminating the data transmission when the transmitted data packet is the last packet.

3. The method according to claim 1, further comprising the step of:

delaying the frame on the down-link by a timing offset.

4. The method according to claim 3, wherein said timing offset is equal to half the duration of one of said plurality of slots.

5. A method for forming a frame structure for use in a time division multiple access (TDMA) communication system, comprising the steps of:

preparing a plurality of slots on the frame;

disposing a plurality of request subslots on an up-link at a leading end of each of said slots;

determining whether generated real-time traffic is voice or data;

evaluating a permission probability of a next request subslot, said permission probability based on whether the real-time traffic is voice or data;

determining whether successful reservation of a communication channel has been established;

waiting for a reserved idle slot when the real-time traffic is voice and a successful reservation has been made;

buffering to a global data queue when the real-time traffic is data and a successful reservation has been made;

transmitting a voice packet at the reserved idle slot in each frame, until the voice real-time traffic is completed;

transmitting a data packet from the global data queue when an idle slot is reached, until the data real-time traffic is completed;

allocating remaining idle slots to non-real-time traffic; and

returning the reserved idle slot to its idle status when the voice data is completed.

6. The method according to claim 5, further comprising the step of:

delaying the frame on the down-link by a timing offset.

7. The method according to claim 6, wherein said timing offset is equal to half the duration of one of said plurality of slots.

8. A method for forming a frame structure for use in a time division multiple access (TDMA) communication system, comprising the steps of:

preparing a plurality of slots on the frame;

disposing a plurality of request subslots on an up-link at a leading end of each of said slots;

disposing a plurality of request subslots on a down-link at a leading end of each of said slots;

determining whether generated real-time traffic is voice or data;

evaluating a permission probability of a next request subslot, said permission probability based on whether the real-time traffic is voice or data;

determining whether successful reservation of a communication channel has been established;

waiting for a reserved idle slot when the real-time traffic is voice and a successful reservation has been made;

buffering to a global data queue when the real-time traffic is data and a successful reservation has been made;

transmitting a voice packet at the reserved idle slot in each frame, until the voice real-time traffic is completed;

transmitting a data packet from the global data queue when an idle slot is reached, until the data real-time traffic is completed;

allocating remaining idle slots to non-real-time traffic; and

returning the reserved idle slot to its idle status when the voice data is completed.

9. The method according to claim 8, further comprising the step of:

delaying the frame on the down-link by a timing offset.

10. The method according to claim 9, wherein said timing offset is equal to half the duration of one of said plurality of slots.