Unlock instant, AI-driven research and patent intelligence for your innovation.

Wireless integrated circuit

A technology of integrated circuits and radio waves, applied to electrical components, data exchange through path configuration, transmission systems, etc., can solve problems such as inability to save power, achieve the effect of reducing burden and improving performance

Inactive Publication Date: 2006-07-12
OKI ELECTRIC IND CO LTD
View PDF0 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the case of using the mesh link 14 for direct communication with neighboring nodes, instead of each node always being able to communicate directly, it is necessary to wait for reception so that it can always receive its own data, and it cannot pass intermittently like the beacon mode. action to save power

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 more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Wireless integrated circuit
  • Wireless integrated circuit
  • Wireless integrated circuit

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0069] (structure)

[0070] FIG. 1 is a schematic functional block diagram showing a wireless LSI according to Embodiment 1 of the present invention.

[0071] The wireless LSI 20 of the first embodiment is an LSI compliant with ZigBee, which is one of the short-range wireless communication standards, and is connected to the RF unit of the antenna 21 , the demodulation unit 23 , the modulation unit 24 , and a two-sided random access memory for data storage. (Random Access Memory, hereinafter referred to as "RAM") 25, RAM 26 for working data storage, host interface section (hereinafter referred to as "host I / F section") 27, and physical layer section 30 etc. The MAC layer is executed by a program on the CPU 40 .

[0072]That is, the wireless LSI 20 is a circuit that operates based on a clock supplied from an oscillator or the like, and the RF unit 22 is provided inside the circuit. The RF unit 22 is constituted by a transmitter / receiver circuit composed of an analog circuit ba...

Embodiment 2

[0109] 6 is a functional block diagram showing a wireless LSI according to Embodiment 2 of the present invention, and the same reference numerals are assigned to the same elements as those in FIG. 1 showing Embodiment 1. FIG.

[0110] In the second embodiment, the data link layer having the MAC layer is removed from the host CPU 40A, the removed data link layer 29 having the MAC layer is installed in the wireless LSI 20A, and the security section (AES) 28 is installed in the wireless LSI 20A. The wireless LSI 20A differs from the first embodiment in this point. The other structures are the same as those of Embodiment 1.

[0111] The security unit 28 and the data link layer 29 are connected between the physical layer unit 30 and the host I / F unit 27, and the RAMs 25 and 26 are connected to these. The security unit 28 is equipped with security functions (eg, a privacy function, an authentication function, etc.) specified in IEEE802.15.4, and, for example, the application data b...

Embodiment 3

[0115] The present invention is not limited to the above-described first and second embodiments, and various modifications are possible. Examples of the third modified example include the following (a) and (b).

[0116] (a) The physical layer unit 30 of the first embodiment can be applied to various circuits that perform latching of data necessary for determining the transmission mode of received data by the physical layer and notification to the MAC. Therefore, for example, even if the host CPU 40A shown in FIG. 6 is built into the one-chip wireless LSI or the like in the wireless LSI 20A, the same effect can be obtained.

[0117] (b) Since the circuit configuration of the wireless LSIs 20 and 20A or the host CPUs 40 and 40A shown in FIGS. 1 and 6 is an example, a timer, a reset function, a clock control function, etc. may be added to these circuits 20 , 20A, 40 and 40A. of various circuits.

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

No PUM Login to View More

Abstract

A ZigBee compliant radio LSI20 is provided with an RF part 22, a demodulating part 23, a physical layer part 30 having a data transmission / reception control part 31 and a transfer mode deciding part 32, and a modulating part 24. In the control part 31, symbol data for reception from the demodulation part 23 are converted into byte data for reception at the time of reception, and symbol data for transmission are outputted to the demodulating part 24 at the time of transmission. In the deciding part 32, at a first point of time when the first specific data among the reception data necessary for deciding a transfer mode in the reception data from the RF part 22 are decided, the data length of the second specific data is decided, and at a second point of time when the data for the decided data length of the second specific data are decided, data necessary for deciding the transfer mode of the reception data are latched, and transferred to the MAC layer.

Description

technical field [0001] The present invention relates to a large-scale wireless integrated circuit (hereinafter referred to as "wireless LSI") using ZigBee (trademark of ZigBee Alliance), one of the standards for short-range wireless communication, and particularly relates to its reception data control. The ZigBee is included in the following wireless communication According to the specification, the interface of the physical layer is based on IEEE (Institute of Electrical and Electronics Engineers) 802.15.4, and the frequency band of the 2.4GHz band, which is the same as IEEE802.11b of the wireless LAN (Local Area Notwork) specification, is divided into 16 channels and used . Background technique [0002] Conventionally, as a wireless LSI using ZigBee, for example, the following documents are described. [0003] Non-Patent Document 1 Oki Technicarureby, Oki Denki Kogyo Co., Ltd., October 1, 2004, Vol. 71, No. 4, P.24-29, 70-73 [0004] FIG. 7 is a communication layer model...

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
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): H04L29/08
CPCH04B1/40H04L12/28
Inventor 佐藤茂幸
Owner OKI ELECTRIC IND CO LTD