Network element for implementing scheduled high-power PTP and low-power PTMP transmissions

• US 7,466,985 B1
• Filed: 09/30/2005
• Issued: 12/16/2008
• Est. Priority Date: 09/30/2005
• Status: Expired due to Fees

• Current Assignee: RPX Clearinghouse LLC (RPX Corporation)
• Original Assignee: Nortel Networks Limited (Nortel Networks Corporation)
• Inventors: Vezza, Brian, Marcanti, Larry, Stankus, John, Nannra, Anoop, Handforth, Martin Ridgway
• Primary Examiner(s): Sharma, Sujatha
• Application Number:
  US11/241,145
• Time in Patent Office: 1,173 Days
• Field of Search: 455/422.1, 455/450, 455/502, 455/454, 455/466, 455/412.1, 455/432.1, 455/426.2, 455/403, 370/432, 370/312, 370/352, 370/390, 370/400, 370/401, 370/328, 370/338, 370465-469, 370/321
• US Class Current: 455/454
• CPC Class Codes: H04W 72/54 based on quality criteria
• CPC Class Codes: H04W 84/047 using dedicated repeater stations
• CPC Class Codes: H04W 92/12 between access points and access point controllers
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

A network element is configured to implement scheduled high-power Point-To-Point (PTP) and low-power Point-To-MultiPoint (TMP) transmissions. The high-power PTP and low-power PTMP transmissions may be scheduled as bursts on an 802.16 network to occur in both the downlink subframe and uplink subframe on a given frequency channel in the wireless network. The use of an air interface for both types of communications allows the PTP and PTMP communications to be scheduled relative to each other in a unified manner to increase quality of service and minimize interference between the backhaul PTP and access PTMP networks, even though the PTP and PTMP communications take place on the same channel using the same underlying wireless technology. Buffers may be used to store data received in a PTP downlink burst prior to transmission in a PTMP downlink burst, and may be used to store data received in an uplink PTMP burst prior to transmission in an uplink PTP burst.

Claims

1. A network element for implementing scheduled high-power point-to-point (PTP) and low-power point-to-multipoint (PTMP) transmissions, comprising:

an air interface configured to transmit and receive both PTP and PTMP transmissions on a given RF channel,

a switch processor containing control logic configured to;

enable the network element to receive a schedule containing scheduling information for downlink PTP transmissions, downlink PTMP transmissions, uplink PTMP transmissions, and uplink PTP transmissions;

enable the network element to cause first data to be received over the air interface during the scheduled downlink PTP transmissions and to cause second data to be received over the air interface during the scheduled uplink PTMP transmissions; and

enable the network element to cause the first data to be transmitted over the air interface during the scheduled downlink PTMP transmissions and to cause the second data to be transmitted over the air interface during the scheduled uplink PTP transmissions.

2. The network element of claim 1, further comprising a queue configured to store the first data after being received over the air interface and prior to being transmitted over the air interface, and further configured to store the second data after being received over the air interface and prior to being transmitted over the air interface.

3. The network element of claim 2, wherein the queue comprises a downlink buffer configured to store the first data and an uplink buffer configured to store the second data, wherein the first and second buffers are logically or physically separate.

4. The network element of claim 1, wherein the network element further comprises a trusted point configured to enable applications to be started in a secure manner on the network element.

5. The network element of claim 1, wherein the scheduled downlink PTP transmissions and scheduled downlink PTMP transmissions are scheduled as bursts in a downlink subframe, and wherein the scheduled uplink PTP transmissions and scheduled uplink PTP transmissions are scheduled as bursts in an uplink subframe, said downlink subframe and uplink subframe comprising two parts of a transmission frame in a wireless protocol.

6. The network element of claim 5, wherein the schedule containing scheduling information for downlink PTP transmissions, downlink PTMP transmissions, uplink PTMP transmissions, and uplink PTP transmissions;

is transmitted as a part of a header of said transmission frame.

7. The network element of claim 1, wherein the air interface comprises:

a low-power PTMP RF amplifier circuit connected to the switch processor,

an omni-directional PTMP antenna connected to the low-power PTP RF amplifier circuit;

a high-power PTP RF amplifier circuit connected to the switch processor; and

a directional PTP antenna connected to the high-power PTP RF amplifier circuit.

8. The network element of claim 1, wherein the air interface comprises:

a low-power PTMP RF amplifier circuit connected to the switch processor,

a high-power PTP RF amplifier circuit connected to the switch processor;

a dual-mode PTP/PTMP antenna configured to operate in either a high-power directional PTP mode or a low-power omni-directional PTMP mode;

a switch having a first input connected to the low-power PTMP RF amplifier circuit and a second input connected to the high-power PTP RF amplifier circuit, and an output connected to the dual-mode PTP/PTMP antenna; and

a time-slot control module configured to operate the switch to enable the dual-mode PTP/PTMP antenna to be alternately connected to the low-power PTMP RF amplifier circuit and the high-power PTP RF amplifier circuit according to the schedule.

9. The network element of claim 1, wherein the air interface comprises:

integrated PTP and PTMP RF amplifier circuitry connected to the switch processor;

a low-gain omni-directional PTMP antenna;

a high-gain directional PTP antenna;

a switch having an input connected to the integrated PTP and PTMP RF amplifier circuitry, a first output connected to the low-gain omni-directional PTMP antenna and a second output connected to the high-gain directional PTP antenna; and

a time-slot control module configured to operate the switch to enable the i integrated PTP and PTMP RF amplifier circuitry to be alternately connected to the low-gain omni-directional PTMP antenna and the high-gain directional PTP antenna.