Transmission of broadcast packets in an RF system

• US 5,341,375 A
• Filed: 11/12/1992
• Issued: 08/23/1994
• Est. Priority Date: 11/12/1992
• Status: Expired due to Term

• Current Assignee: Motorola Mobility LLC (Lenovo Group Ltd.)
• Original Assignee: Motorola, Inc. (Motorola Solutions, Inc.)
• Inventors: Buchholz, Dale R., Robbins, Karen E., Hamilton, R. Lee Jr., Doss, William K.
• Primary Examiner(s): Olms, Douglas W.
• Assistant Examiner(s): Patel, Ajit
• Application Number:
  US07/975,452
• Time in Patent Office: 649 Days
• Field of Search: 370/94.1, 370/60, 455/33.1, 455/33.3, 455/25, 455/54.1, 455/103, 455/66, 455/129, 342/359, 342/371-374, 342/403, 342/406, 342/422, 342/423, 342/434
• US Class Current: 370/349
• CPC Class Codes: H04L 12/1836 with heterogeneous network architecture
• 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 28/06 Optimizing the usage of the radio link, e.g. header compression, information sizing , discarding information system modifying transmission characteristic according to link quality by modifying frame length H04L1/0007; dynamic adaptation of the packet size for flow control or congestion control H04L47/365
• CPC Class Codes: H04W 4/06 Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services

Abstract

Transmission of broadcast packets (46) in a radio frequency (RF) communication system between a control module (22) and user modules (20), wherein the control module (22) and the user modules (20) each have a plurality of antennae (A1-A6) includes generating a list (1100) of control module antennae (A1-A6) in radio communication with at least one of said plurality of user modules; and selecting the listed control module antennae for transmission of broadcast packets (46).

Claims

1. A method for selectively transmitting broadcast packets in a radio frequency (RF) communication system between a control module (CM) and user modules (UMs) having a plurality of user devices connected thereto for receiving said broadcast packets, the control module and the user modules each having a plurality of antennae, oriented to provide a 360°

horizontal pattern of radio coverage, the method comprising the steps of at the control module;

generating a list of control module antennae in radio communication with at least one of said plurality of user modules; and

selecting the listed control module antennae for transmission of broadcast packets.

2. The method of claim 1 further comprising the step of:

transmitting a first broadcast packet on one of said listed control module antenna, prior to transmitting that broadcast packet on a second one of said listed control module antennae.

3. The method of claim 2 further comprising the step of:

transmitting each fragment associated with a first broadcast packet on one of said listed control module antenna, prior to transmitting fragments associated with that broadcast packet on a second one of said listed control module antennae.

4. The method of claim 1 further comprising the step of:

transmitting a first broadcast packet on each of said listed control module antenna, prior to retransmitting that broadcast packet on any one of said listed control module antennae.

5. A method for selectively transmitting broadcast packets in a radio frequency (RF) communication system between a control module and user modules having a plurality of user devices connected thereto for receiving said broadcast packets, the control module and the user modules each having a plurality of antennae, oriented to provide a 360°

horizontal pattern of radio coverage, the method comprising the steps of at the control module;

generating a list of control module antennae in radio communication with at least one user module (UM);

selecting the listed antennae for transmission of broadcast packets; and

transmitting a first broadcast packet on one of said listed antenna, prior to transmitting that broadcast packet on a second one of said listed antennae.

6. The method of claim 5 further comprising the step of:

transmitting the first broadcast packet on each of said listed control module antenna, prior to retransmitting that broadcast packet on any one of said listed control module antennae.

7. The method of claim 5 further comprising the step of:

transmitting each fragment associated with the first broadcast packet on one of said listed control module antenna, prior to transmitting fragments associated with that broadcast packet on a second one of said listed control module antennae.

8. The method of claim 5 further comprising the steps of:

determining whether to transmit a packet received by the control module, to the user modules, as a broadcast packet; and

labeling each such broadcast packet with a predetermined code (M), in a packet header portion thereof, identifying the packet as a broadcast packet.

9. A radio frequency (RF) communication system wherein information is transmitted in the form of broadcast packets between a control module (CM) and user modules (UMs) having a plurality of user devices connected thereto for receiving said broadcast packets, the control module and the user modules each having a plurality of antennae, oriented to provide a 360°

horizontal pattern of radio coverage, the system comprising;

said control module;

means, coupled to said control module, for generating a list of control module antennae in radio communication with at least one of said plurality of user modules; and

means, coupled to said generating means for selecting the listed antennae for transmission of broadcast packets.

10. The system of claim 9 further comprising means for transmitting a broadcast packet on one of said listed antenna, prior to transmitting that broadcast packet on a second one of said listed antennae.

11. The system of claim 9 wherein the plurality of antennae are selected from a group of devices consisting of:

directional antennae; and

omnidirectional antennae.

12. A radio frequency (RF) communication system wherein information is transmitted in the form of broadcast packets between a control module (CM) and user modules (UMs) having a plurality of user devices connected thereto for receiving said broadcast packets, the control module and the user modules each having a plurality of antennae, each oriented to provide a 360°

horizontal pattern of radio coverage, the system comprising;

said control module;

means, coupled to said control module, for generating a list of control module antennae in radio communication with at least one user module (UM);

means, coupled to the generating means, for selecting the listed antennae for transmission of broadcast packets; and

means, coupled to the selecting means, for transmitting a broadcast packet on one of said listed antenna, prior to transmitting that broadcast packet on a second one of said listed antennae.

13. The system of claim 12 further comprising:

means for transmitting a broadcast packet on each of said listed control module antenna, prior to retransmitting that broadcast packet on any one of said listed control module antennae; and

means for transmitting each fragment associated with a broadcast packet on one of said listed control module antenna, prior to transmitting fragments associated with that broadcast packet on a second one of said listed control module antennae.

14. The system of claim 12 further comprising:

means for determining whether to transmit a packet received by the control module, to the user modules, as a broadcast packet; and

means, coupled to the determining means, for labeling each such broadcast packet with a predetermined code (M), in a packet header portion thereof, identifying the packet as a broadcast packet.

15. The system of claim 12 wherein the plurality of antennae are selected from a group of devices consisting of:

directional antennae; and

omnidirectional antennae.