Apparatus and method for controlling transmission power in a wireless communication system
First Claim
1. A method of controlling transmission power of a transmitting terminal among a plurality of terminals for transmitting/receiving frames in a wireless communication system, the frames having a frame structure, the frame structure including a header field including transmission rate information and length information of data transmitted in a frame and including a data field containing the data, the method comprising:
- determining, at a physical (PHY) layer of the transmitting terminal, whether a resource is in use while preparing a frame for transmission based on the rate information and the length information of a header field received from one of the plurality of terminals;
in response to determining the resource is in use, transmitting a busy message from the PHY layer to a Media Access Control (MAC) layer of the transmitting terminal, and in response to determining the resources is not in use, transmitting an idle message from the PHY layer to the MAC layer of the transmitting terminal;
upon receiving the idle message, transmitting a header field including the rate information and the length information of the frame for transmission at a maximum transmission power level available to the transmitting terminal, when it is determined that the resource is not in use; and
transmitting the data field of the frame for transmission at an optimum transmission power level, which is less than the maximum transmission power level of the transmitting terminal, to allow a receiving terminal to receive the transmitted data field.
1 Assignment
0 Petitions
Accused Products
Abstract
A method and system for controlling the transmission power of a terminal transmitting frames in a wireless communication system, the frames having a frame structure including a header field containing information related to a transmission rate and length of data transmitted in a frame and a data field having the data. The transmitting terminal transmits the header field to a receiving terminal at a maximum transmit power level available to the transmitting terminal so that second terminals other than the transmitting terminal and the receiving terminal within the wireless communication system can identify that resources are in use. The transmitting terminal transmits the data field at an optimum transmit power level great enough to allow the data field to reach the receiving terminal.
-
Citations
18 Claims
-
1. A method of controlling transmission power of a transmitting terminal among a plurality of terminals for transmitting/receiving frames in a wireless communication system, the frames having a frame structure, the frame structure including a header field including transmission rate information and length information of data transmitted in a frame and including a data field containing the data, the method comprising:
-
determining, at a physical (PHY) layer of the transmitting terminal, whether a resource is in use while preparing a frame for transmission based on the rate information and the length information of a header field received from one of the plurality of terminals; in response to determining the resource is in use, transmitting a busy message from the PHY layer to a Media Access Control (MAC) layer of the transmitting terminal, and in response to determining the resources is not in use, transmitting an idle message from the PHY layer to the MAC layer of the transmitting terminal; upon receiving the idle message, transmitting a header field including the rate information and the length information of the frame for transmission at a maximum transmission power level available to the transmitting terminal, when it is determined that the resource is not in use; and transmitting the data field of the frame for transmission at an optimum transmission power level, which is less than the maximum transmission power level of the transmitting terminal, to allow a receiving terminal to receive the transmitted data field. - View Dependent Claims (2, 3, 4, 5)
-
-
6. A method of controlling a transmission power of a transmitting terminal among a plurality of terminals for transmitting/receiving frames in a wireless communication system, the frames having a Physical Layer Convergence Protocol (PLCP) Protocol Data Unit (PDU) frame structure, the PLCP PDU frame structure including a PLCP preamble field indicating a start of a PLCP PDU frame, a PLCP header field including transmission rate information and length information of data transmitted in the PLCP PDU frame and a data field including the data, the method comprising:
-
determining, at a PHY layer of the transmitting terminal, whether a resource is in use based on the rate information and the length information of a PLCP header field received from one of the plurality of terminals when PLCP PDU frame for transmission is to be transmitted; in response to determining the resource is in use, transmitting a busy message from the PHY layer to a MAC layer of the transmitting terminal, and in response to determining the resources is not in use, transmitting an idle message from the PHY layer to the MAC layer of the transmitting terminal; upon receiving the idle message, transmitting the PLCP preamble and header fields including the rate information and the length information of the PLCP PDU frame for transmission at a maximum transmission power level available to the transmitting terminal, when it is determined that the resource is not in use; and transmitting the data field of the PLCP PDU frame for transmission at an optimum transmit power level, which is less than the maximum transmission power level, to allow a receiving terminal to receive the transmitted data field. - View Dependent Claims (7, 8, 9, 10)
-
-
11. A system for controlling a transmission power of frames transmitted/received among a plurality of terminals in a wireless communication system, the frames having a frame structure, the frame structure including a header field including transmission rate information and length information of data transmitted associated with the frame structure and a data field including the data, the system comprising:
-
a receiving terminal; and a transmitting terminal for determining whether a resource is in use at a time when a frame is to be transmitted, in response to determining the resource is in use, transmitting a busy message from the PHY layer to a MAC layer of the transmitting terminal and in response to determining the resources is not in use, transmitting an idle message from the PHY layer to the MAC layer of the transmitting terminal, upon receiving the idle message, transmitting the header field of a frame for transmission to the receiving terminal at a maximum transmission power level available to the transmitting terminal to provide an indication to the plurality of terminals other than the transmitting terminal and the receiving terminal within the wireless communication system that a resource is in use, and transmitting the data field of the frame for transmission at an optimum transmit power level, which is less than the maximum transmission power level, to allow the receiving terminal to receive the transmitted data field, wherein the receiving terminal receives the frame for transmission, determines a transmission duration of data transmission of the frame for transmission using the transmission rate information and the length information included in the header field of the frame for transmission, and avoids transmission of another frame during the determined transmission duration. - View Dependent Claims (12)
-
-
13. A system for controlling a transmission power of frames transmitted/received among terminals in a wireless communication system, the frames having a Physical Layer Convergence Protocol (PLCP) Protocol Data Unit (PDU) frame structure, the PLCP PDU frame structure including a PLCP preamble field indicating a start of a PLCP PDU frame, a PLCP header field containing transmission rate information and length information of data transmitted in the PLCP PDU frame and a data field having the data, the system comprising:
-
a receiving terminal; a transmitting terminal for determining whether a resource is in use at a time when a PLCP PDU frame is to be transmitted, in response to determining the resource is in use, transmitting a busy message from the PHY layer to a MAC layer of the transmitting terminal and in response to determining the resources is not in use, transmitting an idle message from the PHY layer to the MAC layer of the transmitting terminal, upon receiving the idle message, transmitting the PLCP PDU frame when it is determined that the resource is not in use including transmitting the PLCP preamble and header fields of the PLCP PDU frame to the receiving terminal at a maximum transmission power level available to the transmitting terminal, and transmitting the data field of the PLCP PDU frame at an optimum transmit power level, which is less than the maximum transmission power level, to allow the receiving terminal to receive the transmitted data field, wherein the receiving terminal receives the transmitted header field of the transmitted PLCP PDU frame, determines a transmission duration of data of the transmitted PLCP PDU frame using the transmission rate and the length information included in the PLCP header field of the transmitted PLCP frame, and avoids transmission of another frame during the determined transmission duration. - View Dependent Claims (14)
-
-
15. A method of controlling a transmission power of a transmitting terminal among terminals for transmitting/receiving frames in a wireless communication system, the frames having a frame structure, the frame structure including a header field including transmission rate information and length information of data transmitted in a frame, and including a data field including the data, the method comprising:
-
in response to determining that a resource is in use, transmitting a busy message from a PHY layer of the transmitting terminal to a MAC layer of the transmitting terminal, and in response to determining the resources is not in use, transmitting an idle message from the PHY layer to the MAC layer; in response to receiving the idle message, transmitting the header field of a frame for transmission including the rate information and the length information to a receiving terminal at a maximum transmission power level available to the transmitting terminal to provide an indication to terminals within the wireless communication system other than the transmitting terminal and the receiving terminal that a resource is in use based on the transmitted header field; and transmitting the data field of the frame for transmission at an optimum transmission power level, which is less than the maximum transmission power level, to allow the receiving terminal to receive the transmitted data field. - View Dependent Claims (16)
-
-
17. A method of controlling a transmission power of a transmitting terminal among terminals for transmitting/receiving frames in a wireless communication system, the frames having a Physical Layer Convergence Protocol (PLCP) Protocol Data Unit (PDU) frame structure, the PLCP PDU frame structure including a PLCP preamble field indicating a start of a PLCP PDU frame, a PLCP header field including transmission rate information and length information of data transmitted in the PLCP PDU frame and a data field including the data, the method comprising:
-
in response to determining that a resource is in use, transmitting a busy message from a PHY layer of the transmitting terminal to a MAC layer of the transmitting terminal, and in response to determining the resources is not in use, transmitting an idle message from the PHY layer to the MAC layer; in response to receiving the idle message, transmitting the PLCP preamble and header fields of a PLCP PDU frame for transmission including the rate information and the length information to a receiving terminal at a maximum transmission power level available to the transmitting terminal to provide an indication to terminals other than the transmitting terminal and the receiving terminal within the wireless communication system that a resource is in use based on the transmitted header field; and transmitting the data field of the PLCP PDU frame for transmission at an optimum, transmit power level, which is less than the maximum transmission power level, to allow the receiving terminal to receive the transmitted data field. - View Dependent Claims (18)
-
Specification