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公开(公告)号：DE69731551D1
公开(公告)日：2004-12-16
申请号：DE69731551
申请日：1997-12-19
Applicant: QUALCOMM INC
Abstract: In a half-duplex communication system in which additional delays in the communication channel may cause a message collision between a message and a response, a timer based collision prevention circuit is utilized to prevent the message collision. The collision prevention circuit determines if the message transmitted by a communication device will be repeated. If the message is to be repeated, the collision prevention circuit sets a countdown collision timer to a predetermined period of time shorter than the shortest repetition interval of the repeated message. A response is only sent to the communication device if the collision timer has not expired. If the timer expires, the collision prevention circuit waits for the message to be retransmitted by the source device before sending the response to the communication device.
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公开(公告)号：DE60211136T2
公开(公告)日：2007-02-22
申请号：DE60211136
申请日：2002-03-28
Applicant: QUALCOMM INC
IPC: H04L12/56 , H04B7/26 , H04L9/08 , H04L9/30 , H04L12/18 , H04L29/06 , H04L29/08 , H04W12/02 , H04W12/04 , H04W28/06 , H04W76/00 , H04W80/00
Abstract: Method and apparatus for providing an overhead information for a broadcast service in a wireless communication system via an out-of-band transmission. The mobile station is able to contact the content server directly using the out-of-band signaling over a packet data service option. The out-of-band communication allows the content server to update the information without transmitting via an intermediate infrastructure element. In one embodiment, the overhead information includes a service option number corresponding to a set of broadcast parameters, such as those identifying a protocol stack for processing broadcast content.
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公开(公告)号：DE69734523D1
公开(公告)日：2005-12-08
申请号：DE69734523
申请日：1997-12-05
Applicant: QUALCOMM INC
Abstract: A novel and improved method and apparatus for providing an interface to a digital wireless telephone system compatible with standard analog wire line fax machines is described. To process a fax, a source interface waits until an interface to a destination fax machine has been established before establishing an interface to a source fax machine. The source fax transmission rate must be less than or equal to the destination fax transmission rate and the data rate of the digital channel. To establish the source fax interface at the proper rate, the source interface first selects and initial data rate from a set of standard fax transmission rates. The source interface sends unacceptable rate (failure to train) messages to the source fax machine until the source fax transmission rate is less than or equal to the data channel rate and the destination fax transmission rate. During fax processing, the destination interface inserts non-printing data (fill bits) if the destination fax transmission rate is greater than the source fax transmission rate. Fill bits are also inserted to compensate for transmission delays.
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公开(公告)号：DE69928661T2
公开(公告)日：2006-08-17
申请号：DE69928661
申请日：1999-05-19
Applicant: QUALCOMM INC
Inventor： REZAIIFAR RAMIN , LEUNG K
Abstract: A method for detecting delayed data frames in a transport function includes the steps of comparing a frame sequence counter with a predetermined threshold value, detecting a delayed frame if the sequence counter exceeds the threshold value, and processing the detected delayed frame accordingly. In an RLP data transport protocol, the delayed frame may be processed as a retransmitted frame. The threshold value may be proportional to the maximum number of frames sent in a given bundle times the maximum delay, in units of frame intervals, between frames sent simultaneously over the air in the same frame interval.
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Patent Agency Ranking
公开(公告)号：DE69734523T2
公开(公告)日：2006-08-10
申请号：DE69734523
申请日：1997-12-05
Applicant: QUALCOMM INC
Abstract: A novel and improved method and apparatus for providing an interface to a digital wireless telephone system compatible with standard analog wire line fax machines is described. To process a fax, a source interface waits until an interface to a destination fax machine has been established before establishing an interface to a source fax machine. The source fax transmission rate must be less than or equal to the destination fax transmission rate and the data rate of the digital channel. To establish the source fax interface at the proper rate, the source interface first selects and initial data rate from a set of standard fax transmission rates. The source interface sends unacceptable rate (failure to train) messages to the source fax machine until the source fax transmission rate is less than or equal to the data channel rate and the destination fax transmission rate. During fax processing, the destination interface inserts non-printing data (fill bits) if the destination fax transmission rate is greater than the source fax transmission rate. Fill bits are also inserted to compensate for transmission delays.
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公开(公告)号：DE69731551T2
公开(公告)日：2005-10-20
申请号：DE69731551
申请日：1997-12-19
Applicant: QUALCOMM INC
Abstract: In a half-duplex communication system in which additional delays in the communication channel may cause a message collision between a message and a response, a timer based collision prevention circuit is utilized to prevent the message collision. The collision prevention circuit determines if the message transmitted by a communication device will be repeated. If the message is to be repeated, the collision prevention circuit sets a countdown collision timer to a predetermined period of time shorter than the shortest repetition interval of the repeated message. A response is only sent to the communication device if the collision timer has not expired. If the timer expires, the collision prevention circuit waits for the message to be retransmitted by the source device before sending the response to the communication device.
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公开(公告)号：DE60208681T2
公开(公告)日：2006-08-24
申请号：DE60208681
申请日：2002-07-02
Applicant: QUALCOMM INC
Inventor： CHEN TAO , LEUNG K , TIEDEMANN G
Abstract: An apparatus for providing frame re-transmission in a broadcast communication system. Frame re-transmission is accomplished only when a predetermined number of negative acknowledgement messages are received with respect to one or more data frames. The predetermined number may vary in accordance with various operating parameters, such as the latency of the transmission and/or the number of wireless communication devices currently receiving a broadcast transmission.
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公开(公告)号：DE60208681D1
公开(公告)日：2006-04-06
申请号：DE60208681
申请日：2002-07-02
Applicant: QUALCOMM INC
Inventor： CHEN TAO , LEUNG K , TIEDEMANN G , SINNARAJAH REGULAN
Abstract: An apparatus for providing frame re-transmission in a broadcast communication system. Frame re-transmission is accomplished only when a predetermined number of negative acknowledgement messages are received with respect to one or more data frames. The predetermined number may vary in accordance with various operating parameters, such as the latency of the transmission and/or the number of wireless communication devices currently receiving a broadcast transmission.
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