Invention Grant
- Patent Title: Jitter correcting apparatus capable of ensuring synchronism between transmitter apparatus and receiver apparatus
- Patent Title (中): 抖动校正装置能够确保发送装置与接收装置之间的同步
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Application No.: US10565906Application Date: 2005-02-03
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Publication No.: US07664145B2Publication Date: 2010-02-16
- Inventor: Shigeo Akamatsu , Harunobu Mori , Susumu Kitaguchi
- Applicant: Shigeo Akamatsu , Harunobu Mori , Susumu Kitaguchi
- Applicant Address: JP Osaka
- Assignee: Sharp Kabushiki Kaisha
- Current Assignee: Sharp Kabushiki Kaisha
- Current Assignee Address: JP Osaka
- Agency: Birch, Stewart, Kolasch & Birch, LLP
- Priority: JP2004-029667 20040205
- International Application: PCT/JP2005/001587 WO 20050203
- International Announcement: WO2005/076513 WO 20050818
- Main IPC: H04L7/06
- IPC: H04L7/06
Abstract:
When a beacon (n−1) that is transmitted from a piconet coordinator (PNC) is detected in a MAC layer of the PNC and a MAC layer of a device (DEV), a detection signal is immediately transmitted to a LINK layer. In the LINK layer, a count is made from the detection of the beacon to a predetermined timing to generate a cycle timer. The PNC adds the PNC cycle timer to the subsequent beacon (n) and transmits the beacon to the DEV. In the LINK layer of the DEV, a comparison is made between a DEV cycle timer generated according to the beacon (n−1) and the PNC cycle timer received from the PNC and uses the value of the difference therebetween to correct the DEV cycle timer to be matched with the PNC cycle timer.
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