Method for delivering broadcast packets in a frequency hopping local area network

• US 5,583,866 A
• Filed: 12/05/1994
• Issued: 12/10/1996
• Est. Priority Date: 12/05/1994
• Status: Expired due to Term

• Current Assignee: Google Technology Holdings LLC (Alphabet Inc.)
• Original Assignee: Motorola, Inc. (Motorola Solutions, Inc.)
• Inventors: Vook, Frederick W., Doss, William K., Demange, Mark G.
• Primary Examiner(s): Hsu, Alpus H.
• Assistant Examiner(s): NGO, RICKY QUOC
• Application Number:
  US08/349,755
• Time in Patent Office: 736 Days
• Field of Search: 370/69.1, 370/29, 370/80, 370/84, 370/85.8, 370/94.2, 370/95.1, 370/94.1, 370/95.2, 370/95.3, 370/85.2, 370/85.385.7, 340/825.08, 340/825.17, 340/825.32, 340/825.44, 455/51.2, 455/53.1, 455/54.1, 455/57.1, 455/67.7, 455/33.1, 455/33.2, 455/38.1, 455/38.2, 455/38.3, 455/54.2, 379/58, 379/59, 379/60, 379/63
• US Class Current: 370/312
• CPC Class Codes: H04L 12/1877 Measures taken prior to transmission
• CPC Class Codes: H04L 12/189 in combination with wireless systems selective distribution or broadcast in wireless communication networks H04W4/06
• CPC Class Codes: H04W 52/0229 where the received signal is a wanted signal
• CPC Class Codes: H04W 68/025 Indirect paging
• CPC Class Codes: H04W 72/30 Resource management for broadcast services
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

A method used in a communication system (10) having central controllers (14) in communication with a plurality of user devices (12) where synchronizing data (34) and user data (35) are transmitted for a predetermined period of time defining a dwell (30). The method for delivering data to more than one user device (12) simultaneously includes the steps of providing an indicator (34) associated with at least a portion of a dwell indicating that the transmission of user data (35) is directed towards more than one user device (12), and informing the user devices of the repetition rate at which the indicator is transmitted. The user device schedules periods of time during which it is enabled and disabled respectively, based upon the repetition rate of the indicator received such that the user device is enabled and receives the data directed towards more than one user device.

Claims

1. In a communication system having a central controller in communication with a plurality of user devices where transmissions including synchronizing data and user data are transmitted within a predetermined period of time defining a dwell, each user device being enabled for a predetermined period of time during which it is capable of receiving the transmissions, and being disabled for a remaining predetermined period of time during which it is incapable of receiving the transmissions, a method for delivering data to more than one user device simultaneously, comprising the steps of:

transmitting an indicator associated with at least a portion of the dwell indicating that a transmission of the user data is directed towards selected user devices;

informing the user devices of a repetition rate N N, being an integer greater than 1, indicating that upon the occurrence of each Nth indicator only a transmission of the user data is directed towards more than one user device; and

each user device scheduling periods of time during which it is enabled and disabled respectively, based upon the repetition rate N of the indicator.

2. The method according to claim 1 wherein the central controller is configured to transmit the synchronizing data during a first portion of the dwell and the user data during a second portion of the dwell.

3. The method according to claim 1 wherein the indicator is transmitted within the synchronizing data.

4. The method according to claim 1 wherein the transmission of the user data directed towards more than one user device is transmitted from the central controller to at least a portion of the user devices.

5. The method according to claim 1 wherein the transmission of user data directed towards more than one user device is transmitted from the central controller to the user devices and is not transmitted between user devices.

6. The method according to claim 1 further comprising the step of inserting within the user data directed towards more than one user device information indicating that more data directed towards more than one user device is forthcoming.

7. The method according to claim 1 , further comprising the step of limiting a number of indicators that are transmitted to the more than one user device.

8. The method according to claim 1 further comprising the step of limiting the user data available for transmission to the more than one user device that receive the indicator.