Apparatus and method for transmitting packets in wireless network

• US 20070109996A1
• Filed: 11/16/2006
• Published: 05/17/2007
• Est. Priority Date: 11/16/2005
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Jung, Hye-young
• Granted Patent: US 7,986,714 B2
• Time in Patent Office: Days
• US Class Current: 370/329
• CPC Class Codes: H04L 1/0009 by adapting the channel coding H04L1/1812 takes precedence
• CPC Class Codes: H04L 1/08 by repeating transmission, e.g. Verdan system H04L1/1858 and H04L1/189 take precedence
• CPC Class Codes: H04L 1/189 Transmission or retransmission of more than one copy of a message
• CPC Class Codes: H04L 69/16 Implementation or adaptation of Internet protocol [IP], of transmission control protocol [TCP] or of user datagram protocol [UDP]
• CPC Class Codes: H04L 69/165 Combined use of TCP and UDP protocols; selection criteria therefor
• CPC Class Codes: H04L 69/324 in the data link layer [OSI layer 2], e.g. HDLC

Abstract

Provided is an apparatus and method for transmitting packets in a wireless network. The apparatus includes a motion calculation unit, a transmission repetition adjustment unit, and a packet transmission repetition unit, The, motion calculation unit calculates the motion value of a mobile terminal. The transmission repetition adjustment unit receives N-value determination information and determines the number of repetitions (N value) of transmission of a packet transmitted and received by the mobile terminal based on the received N-value determination information, and the motion value calculated by the motion calculation unit. The packet transmission repetition unit repeatedly transmits the packet, which is received from a data link layer, to a physical layer according to the N value determined by the transmission repetition adjustment unit.

Claims

1. An apparatus for transmitting packets in a wireless network, the apparatus comprising:

a motion calculation unit, which calculates a motion value of a mobile terminal;

a transmission repetition adjustment unit, which receives N-value determination information and determines a number of repetitions of transmission of a packet transmitted and received by the mobile terminal based on said N-value determination information and the motion value calculated by the motion calculation unit; and

a packet transmission repetition unit, which repeatedly transmits the packet, which is received from a data link layer, to a physical layer according to the N value determined by the transmission repetition adjustment unit.

2. The apparatus of claim 1, wherein the N-value determination information comprises a motion calculation factor for calculating the motion value and initial information values for calculating the N value, wherein the initial information values comprise a minimum motion value, which is a reference value for repeated transmission, and an upper limit value, which represents an upper limit for the number of repetitions of transmission of the packet.

3. The apparatus of claim 2, wherein the motion calculation unit comprises:

a motion calculation factor detection unit, which detects the motion calculation factor from the transmission repetition adjustment unit; and

a motion operation unit, which receives the motion calculation factor detected by the motion calculation factor detection unit, and performs an operation on the motion value.

4. The apparatus of claim 3, wherein the transmission repetition adjustment unit comprises:

an information input unit, which receives the N-value determination information and the motion value obtained by the operation performed by the motion operation unit; and

an N-value determination unit, which receives the initial information values, which are included in the N-value determination information, and the motion value from the information input unit, and determines the N value using a predetermined operation.

5. The apparatus of claim 4, wherein the predetermined operation is implemented using the following equation:

$N={\mathrm{e<br><br>}}^z,\left(0<br><br>\text{\hspace{1em}<br><br>}<<br><br>\text{\hspace{1em}<br><br>}<br><br>N<br><br>\text{\hspace{1em}<br><br>}<<br><br>\text{\hspace{1em}<br><br>}<br><br>N_{\max }\right)$ $Z=\frac{M-\mathrm{\alpha <br><br>}}{C}$

where N is the number of repetitions of transmission of a packet, M is a motion value of a current mobile terminal, α

is a minimum motion value, which is a reference value for calculating the number N, N_max is an upper limit value for the N value, and C is an adjustment constant.

6. The apparatus of claim 4, wherein the motion calculation factor detection unit, which detects the motion calculation factor from the information input unit.

7. The apparatus of claim 4, wherein the packet transmission repetition unit repeatedly transmits the packet, which is received from the data link layer, to the physical layer according to the N-value determined by the N-value determination unit.

14. The apparatus of claim 5, wherein the packet transmission repetition unit repeatedly transmits the packet, which is received from the data link layer, to the physical layer according to the N-value determined by the N-value determination unit.

15. The apparatus of claim 6, wherein the packet transmission repetition unit repeatedly transmits the packet, which is received from the data link layer, to the physical layer according to the N-value determined by the N-value determination unit.

16. The apparatus of claim 1, wherein the motion calculation unit, the transmission repetition adjustment unit, and the packet transmission repetition unit are at least one of a field programmable gate area, an application specific integrated circuit, and a processor.

8. A method of transmitting packets in a wireless network, the method comprising:

receiving N-value determination information for determining a number N of repetitions of transmission of a packet;

determining N value based on the received N-value determination information; and

repeatedly transmitting a packet, which is received from a data link layer, to a physical layer according to the determined N value.

9. The method of claim 8, wherein the N-value determination information comprises a motion calculation factor for calculating a motion value, and initial information values for calculating the N value, the initial information values comprising a minimum motion value, which is a reference value for repeated transmission, and the upper limit value, which represents an upper limit for the number of repetitions of transmission of a packet.

10. The method of claim 9, wherein the determining of the N value comprises:

calculating the motion value of a mobile terminal using the motion calculation factor; and

determining the N value based on a predetermined operation using the initial information values and the motion value.

11. The method of claim 10, wherein the predetermined operation is implemented using the following equation:

$N={\mathrm{e<br><br>}}^z,\left(0<br><br>\text{\hspace{1em}<br><br>}<<br><br>\text{\hspace{1em}<br><br>}<br><br>N<br><br>\text{\hspace{1em}<br><br>}<<br><br>\text{\hspace{1em}<br><br>}<br><br>N_{\max }\right)$ $Z=\frac{M-\mathrm{\alpha <br><br>}}{C}$

where N is the number of repetitions of transmission of a packet, M is a motion value of a current mobile terminal, α

is a minimum motion value, which is a reference value for calculating the number N, N_max is an upper limit value for the N value, and C is an adjustment constant.

12. The method of claim 11, wherein the repeated transmission of the packet comprises:

creating a packet transmission repetition layer that is responsible for the repeated transmission of the packet between the data link layer and the physical layer; and

the packet transmission repetition layer repeatedly transmitting the packet, which is received from the data link layer, to the physical layer according to the determined N value.

13. A computer-readable storage medium storing program code for executing the method of claim 8.