Optimizing method for automatic retransmission request in OFDMA system
An automatic retransmission request, orthogonal frequency division multiple access technology, applied in the signal channel, using the return channel for error prevention/detection, etc., can solve the problem of multiple transmissions, waste of wireless bandwidth resources, and reduce the performance of ARQ-enabled connection, etc. problem, to achieve the effect of reducing transmission delay, saving air interface bandwidth, and improving performance
Inactive Publication Date: 2012-07-04
ZTE CORP
View PDF0 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
In some specific occasions, when the receiving end hopes that the sending end can send a new ARQ block as soon as possible, it may use type 0, type 2 and type 3 feedback to negatively confirm the ARQ block that needs to be received next, but does not know The sending end of these ARQ blocks has not sent or just sent, which may also cause multiple short-term sending
[0007] Transmitting the same ARQ block multiple times in a short period of time obviously wastes precious wireless bandwidth resources, and the sending priority of the retransmitted block is higher than that of the newly transmitted block, thus increasing the overall transmission time of the system. delay, reducing the performance of ARQ-enabled connections
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0040] The specific implementation and embodiments of the present invention for optimizing automatic repeat request in an OFDMA system will be described in detail below with reference to the accompanying drawings.
[0041] The present invention relates to an optimization method for an automatic retransmission request in an OFDMA system, which is an optimization processing method for negative acknowledgment NACK (Negative Acknowledge, hereinafter referred to as NACK) feedback in an ARQ mechanism, and is applicable to OFDMA wireless communication In the system, it is the application of the ARQ mechanism. Its main core point is that based on sending an automatic repeat request block and receiving a negative acknowledgment of the automatic repeat request block in a short period of time, the negative acknowledgment is discarded; as for technologies such as OFDMA and ARQ blocks, they are in the field. It is well known to those skilled in the art and will not be repeated here.
[00...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention discloses an optimization method of an automatic retransmission request (ARR) in an orthogonal frequency division multiple Access (OFDMA) system, which comprises the steps as follows: after an ARR block is transmitted, the ARR block is arranged in a state waiting to get a feedback; and as the ARR block is transmitted, a new negative acknowledgement to the ARR block is received againin a short time, the negative acknowledgement received in a preset time to the ARR block is discarded without further processing the negative acknowledgement, thus stopping retransmitting of meaningless ARRs, saving vent bandwidth, reducing the enabling connection whole transmitting delay of the ARR and effectively enhancing the enabling connection performance of the ARR.
Description
technical field [0001] The invention relates to the technical field of wireless communication for transmitting data in an OFDMA system, in particular to an optimization method for an automatic retransmission request in an OFDMA system. Background technique [0002] The current IEEE802.16 (Broadband Wireless MAN Standard-WiMAX) is one of the wireless communication technologies using OFDMA (Orthogonal Frequency Division Multiple Access, hereinafter referred to as OFDMA) system, and the Orthogonal Frequency Division Multiple Access system OFDMA There is an automatic repeat request ARQ (Automatic Repeat Request, hereinafter referred to as ARQ) mechanism. As early as World War II, ARQ began to be applied to wireless telegraph communication, and achieved great success in the military. Because ARQ has the advantages of strong system error correction ability, good adaptability, and basically irrelevant to channel interference changes, it has been widely used in wireless communicatio...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): H04L1/18H04L1/16H04L5/02
Inventor 肖志坚
Owner ZTE CORP