Method and apparatus for resolving half duplex message collisions
First Claim
1. A method for resolving a message collision for a message transmitted over a wireless TDMA packet channel for a first subscriber communicating in a half duplex mode comprising:
- dividing an outbound message designated for the first subscriber and producing therefrom an independent first message portion and an independent second message portion wherein each of the independent first and second message portions are allocated to two different wireless outbound reservations;
first transmitting the independent first message portion based on a first outbound reservation. detecting whether collision occurred between an inbound transmission from the first subscriber and the transmitted independent first portion destined for the first subscriber; and
if a collision is detected, avoid sending the independent second message portion to the first subscriber, otherwise, send the independent second message portion for the first subscriber based on a second outbound reservation.
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Accused Products
Abstract
A method and apparatus resolves message collisions in wireless TDMA packet systems for subscribers that communicate in half duplex modes. In one embodiment, a wireless TDMA network element (100) includes at least one processing device (104) and memory (106), operatively coupled to the processing device (104). The processing device (104) divides an outbound message (300) designated for a first subscriber and produces therefrom an independent first message portion (such as an independent short message) (302) and an independent second message portion (such as an independent longer remaining message) (304). Each of the independent first and second message portions (302,304) are allocated to two different wireless outbound reservations for a common subscriber. The independent first message (302) is transmitted first. If a collision is detected, the wireless network element (100) avoids sending the independent second portion (304) to the first subscriber, otherwise the independent second message portion (304) is subsequently sent.
55 Citations
19 Claims
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1. A method for resolving a message collision for a message transmitted over a wireless TDMA packet channel for a first subscriber communicating in a half duplex mode comprising:
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dividing an outbound message designated for the first subscriber and producing therefrom an independent first message portion and an independent second message portion wherein each of the independent first and second message portions are allocated to two different wireless outbound reservations;
first transmitting the independent first message portion based on a first outbound reservation. detecting whether collision occurred between an inbound transmission from the first subscriber and the transmitted independent first portion destined for the first subscriber; and
if a collision is detected, avoid sending the independent second message portion to the first subscriber, otherwise, send the independent second message portion for the first subscriber based on a second outbound reservation. - View Dependent Claims (2, 3, 4, 5)
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6. A method for resolving a message collision for a message transmitted over a wireless TDMA packet channel for a first subscriber communicating in a half duplex mode comprising:
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transmitting an outbound message designated for the first subscriber;
detecting whether collision occurred between an inbound transmission from the first subscriber and the transmitted outbound message;
if a collision is detected, placing collision detection data in a control slot readable by other subscribers, wherein the collision detection data indicates that the outbound message for the first subscriber has been terminated due to a collision; and
stopping the transmission of the rest of the outbound message for the first subscriber, and leaving the message in a message queue for later transmission. - View Dependent Claims (7, 8, 9, 10, 11, 12, 14, 15, 16, 17, 19)
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13. A wireless TDMA network element for resolving a message collision for a message transmitted over a wireless TDMA packet channel for a first subscriber communicating in a half duplex mode comprising:
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at least one processing device; and
memory, operatively coupled to the processing device, containing executable instructions that when read by the at least one processing device causes the at least one processing device to;
divide an outbound message designated for the first subscriber and producing therefrom an independent first message portion and an independent second message portion wherein each of the independent first and second message portions are allocated to two different wireless outbound reservations;
first transmit the independent first message portion based on a first outbound reservation;
detect whether collision occurred between an inbound transmission from the first subscriber and the transmitted independent first portion destined for the first subscriber; and
if a collision is detected, avoid sending the independent second message portion to the first subscriber, otherwise, send the independent second message portion for the first subscriber based on a second outbound reservation.
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18. A wireless TDMA network element for resolving a message collision for a message transmitted over a wireless TDMA packet channel for a first subscriber communicating in a half duplex mode comprising:
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at least one processing device; and
memory, operatively coupled to the processing device, containing executable instructions that when read by the at least one processing device causes the at least one processing device to;
transmit an outbound message designated for the first subscriber;
detect whether collision occurred between an inbound transmission from the first subscriber and the transmitted outbound message;
if a collision is detected, place collision detection data in a control slot readable by other subscribers, wherein the collision detection data indicates that the outbound message for the first subscriber has been terminated due to a collision; and
stop the transmission of the rest of the outbound message for the first subscriber, and leaving the message in a message queue for later transmission.
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Specification