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Methods for network throughput enhancement

A point-to-point, sub-range technology, applied in the data field, can solve problems such as low spectrum utilization

Inactive Publication Date: 2014-04-16
AGENCY FOR SCI TECH & RES +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The above results in low spectrum utilization and unused frequency bands

Method used

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  • Methods for network throughput enhancement
  • Methods for network throughput enhancement
  • Methods for network throughput enhancement

Examples

Experimental program
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Effect test

example 1

[0123] assume n 1 =n 2 =n=5 and P clk =528MHz, C A = 1 / 528 μs, Y measures 342.595 μs and Y′ measures 65882.595 μs, then using equation (5), C D can be estimated to be 1.89405ns, and using equation (6), B D It can be estimated to be 2.5752μs. At the superframe period of D 414 (=pC D ), the clock count pC of A 411 D / C A ~34605028 cycles. However, the clock of D 414 still counts p = 65536 x 528 = 34603008 cycles. The virtual clock of A 411 can be obtained by subtracting one clock cycle from the physical clock cycle of A 411 every 17131 (=34605028 / (34605028-34603008)) physical clock cycles.

example 2

[0125] assume n 1 =n 2 =n=5 and P clk =66MHz, C A = 1 / 66 μs, Y measures 342.595 μs and Y′ measures 65882.595 μs, then using equation (5), C D can be estimated to be 15.152ns, and using equation (6), B D It can be estimated to be 2.584μs. At the superframe period of D 414 (=pC D ), the clock count pC of A 411 D / C A ~4325514 cycles. However, the clock of D 414 still counts p = 65536 x 66 = 4325376 cycles. The virtual clock of A 411 can be obtained by subtracting one clock cycle from the physical clock cycle of A 411 every 31344 (˜4325514 / (4325514−4325376)) physical clock cycles.

[0126] Figure 17 A flowchart of the synchronization method is given in .

[0127] exist Figure 17 where P is the number of physical clock cycles of a device during the superframe period of the slowest device, and Q (Q=65536×528) is the number of physical clock cycles of the slowest device during the same superframe period of the slowest device. First, in process 1701, a device joins a b...

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Abstract

A method for transmitting OFDM symbols by a plurality of ad-hoc radio communication devices in an ad-hoc radio communication devices' group is provided, the method comprising: a first ad-hoc radio communication device of the ad-hoc radio communication devices' group transmitting a first plurality of two OFDM symbols in a first plurality of two frequency sub-ranges of a frequency range selected for transmission in accordance with a frequency hopping pattern, the frequency range comprising a plurality of frequency sub-ranges; in the same transmission time period, a second ad-hoc radio communication device of the ad-hoc radio communication devices' group transmitting a second plurality of two OFDM symbols in a second plurality of two frequency sub-ranges of the frequency range, wherein the second plurality of frequency sub-ranges has no overlap with the first plurality of frequency sub-ranges.

Description

[0001] Cross References to Related Applications [0002] This application claims priority to US Provisional Application 61 / 053,335, filed May 15, 2008, which is hereby incorporated by reference in its entirety for all purposes. technical field [0003] Embodiments of the invention relate to the field of communication systems, such as ad hoc radio communication systems. As an example, an embodiment relates to a method of transmitting data, such as OFDM symbols. Background technique [0004] ECMA standard (ECMA 368 / 369) and ISO / IEC standard (ISO IEC 26907 / 26908) [1] [2] [3] have proposed technical specifications for UWB physical layer (PHY) and media access control layer (MAC) . In addition, the Wireless Personal Area Network (WPAN) Working Group of the National Information Technology Standardization (NITS) Technical Committee of China is preparing to use the ECMA [1] specification as a basis to define a Chinese high-speed UWB standard. In the present invention, the follow-...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L5/00H04B1/713
CPCH04L5/0007H04L5/0062H04L5/0037H04B1/713
Inventor 彭晓明阿南斯·塞布拉马尼安陈保善张海英
Owner AGENCY FOR SCI TECH & RES
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