Method of transferring a TCP stream in PAN

• US 20050152394A1
• Filed: 01/12/2005
• Published: 07/14/2005
• Est. Priority Date: 01/13/2004
• Status: Abandoned Application

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Cho, Jun-haeng
• Application Number:
  US11/033,255
• Publication Number:
  US 20050152394A1
• Time in Patent Office: Days
• US Class Current: 370/442
• CPC Class Codes: H04L 1/1607 Details of the supervisory signal
• CPC Class Codes: H04W 56/00 Synchronisation arrangements
• CPC Class Codes: H04W 72/0446 Resources in time domain, e.g. slots or frames
• CPC Class Codes: H04W 72/21 in the uplink direction of a wireless link, i.e. towards the network
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal
• CPC Class Codes: H04W 84/10 Small scale networks; Flat hierarchical networks

Abstract

A method of transferring a TCP stream in a Personal Area Network (PAN) synchronized with a synchronous signal broadcasted from a coordinator, including: transmitting to the coordinator, via a first device at a sending side desiring to send the TCP stream among plural devices linked to the PAN, a channel time request command including information that a stream to be used is a TCP stream to request a channel time allocation; allocating, via the coordinator by referring to the channel time request command, a channel time corresponding to the channel time requested by the first device; inserting information on the allocated channel time into the synchronous signal broadcast to the first device and a second device at a receiving side; and transmitting the TCP data from the first device to the second device and transmitting a TCP acknowledgement (ACK) from the second device to the first device upon receipt of the TCP data, the transmitting and receiving being in the allocated channel time inserted into the synchronous signal.

Claims

1. A method of transferring a TCP stream in a Personal Area Network (PAN) synchronized with a synchronous signal broadcasted from a coordinator, comprising:

transmitting to the coordinator, via a first device at a sending side desiring to send the TCP stream among plural devices linked to the PAN, a channel time request command including information that a stream to be used is a TCP stream to request a channel time allocation;

allocating, via the coordinator by referring to the channel time request command, a channel time corresponding to the channel time requested by the first device;

inserting information on the allocated channel time into the synchronous signal broadcast to the first device and a second device at a receiving side; and

transmitting the TCP data from the first device to the second device and transmitting a TCP acknowledgement (ACK) from the second device to the first device upon receipt of the TCP data, the transmitting and receiving being in the allocated channel time inserted into the synchronous signal.

2. The method of transferring a TCP stream in a PAN as claimed in claim 1, wherein, in the transmitting, the PAN is a Wireless Personal Area Network (WPAN).

3. The method of transferring a TCP stream in a PAN as claimed in claim 1, wherein the requesting the channel time allocation includes informing that the stream is a TCP by use of the first bit of a reserved field among a CTRq control field, in the channel time request command.

4. The method of transferring a TCP stream in a PAN as claimed in claim 1, wherein, in the inserting, a predetermined index among index fields in a Channel Time Allocation (CTA) IE provided in a beacon frame used as a synchronous signal to inform that a stream to be transmitted from the first device at a sending side to devices at a receiving side is a TCP is added.

5. The method of transferring a TCP stream in a PAN as claimed in claim 4, wherein the predetermined index is 0x01.

6. The method of transferring a TCP stream in a PAN as claimed in claim 1, wherein the transmitting includes:

transmitting a Medium Access Control (MAC) fragment from the first device to devices at the receiving side and switching a transmitting mode Tx of the first device to a receiving mode Rx to listen to confirm whether devices at the receiving side have an acknowledgement (ACK) packet to transmit; and

switching the receiving mode Rx of the devices at the receiving side to the transmitting mode Tx to transmit the ACK packet, when the devices at the receiving side have an ACK packet to transmit.

7. The method of transferring a TCP stream in a PAN as claimed in claim 6, further comprising switching the receiving mode Rx of the first device to the transmitting mode Tx to continuously transmit the MAC fragment, when the devices at the receiving side have no ACK packet to transmit.

8. A method of decreasing transmission delay of a TCP stream in a network, comprising:

requesting a channel time allocation by transmitting to a coordinator a channel time request command which includes information that a stream to be transmitted is a TCP stream;

allocating a channel time corresponding to the channel time requested based on the channel time request command;

inserting information on the allocated channel time into a synchronous signal broadcast from a coordinator; and

transmitting the TCP stream and a TCP acknowledgement (ACK) in the allocated channel time inserted into the synchronous signal.

9. The method of claim 8, wherein the network is a Personal Area Network (PAN) synchronized with a synchronous signal broadcast from the coordinator.

10. The method of claim 8, wherein a first device at a sending side of the network performs the requesting when the TCP stream is to be sent to a second device at a receiving side of the network, the first device transmits the TCP stream, and the second device transmits the TCP acknowledgement packet upon receipt of the TCP stream.

11. The method of claim 10, wherein the synchronous signal is broadcast to the first and second devices.