Media.Player

Receiver Initiated Channel Hopping (RICH)

Technology Benefits

Solves the hidden-terminal problem by eliminating data packet collisions without the need to carrier sensing or code assignments System performance does not depend upon the network topology

Technology Application

Ad hoc networks based on commercial radios operating in unlicensed frequency bands

Detailed Technology Description

Scientists at the University of California have developed a novel group of MAC protocols called receiver-initiated channel-hopping (RICH) protocols. These are the first MAC protocols based on receiver-initiated collision-avoidance handshakes. These reliable protocols provide collision-free reception of data at the intended receivers in the presence of hidden terminals without the need for carrier sensing or unique code assignments to nodes.

Supplementary Information

Patent Number: US7002910B2
Application Number: US200121289A
Inventor: Garcia Luna Aceves, Jose Joaquin | Tzamaloukas, Asimakis
Priority Date: 30 Oct 2000
Priority Number: US7002910B2
Application Date: 29 Oct 2001
Publication Date: 21 Feb 2006
IPC Current: H04B0001713 | H04L001228 | H04L001256 | H04W007404 | H04B0001715
US Class: 370229 | 370330 | 370335 | 370342 | 375132 | 375138 | 375145 | 375149 | 455436
Assignee Applicant: The Regents of the University of California
Title: Receiver-initiated channel-hopping (RICH) method for wireless communication networks
Usefulness: Receiver-initiated channel-hopping (RICH) method for wireless communication networks
Summary: Initiating channel hopping for wireless communication networks.
Novelty: Receiver-initiated channel hopping for wireless communication networks to provide collision avoidance by maintaining nodes in same channel hop during data transfer

Industry

ICT/Telecom

Sub Category

Telecommunication

Application No.

7002910

Others

Additional Technologies by these Inventors

• Scalable Integrated Services Architecture for Computer Networks
• Scalable Multicast Routing Protocol for Wireless and Mobile Computer Networks
• Bandwidth Efficient Source Tracing (Best) for Wireless Networks
• On-Demand Loop-Free Multipath Routing
• Differentiating Congestion Vs. Random Loss: A Method For Improving TCP Performance Over Wireless Links
• Improving TCP Congestion Control over Networks with Heterogeneous Transmission Media
• Mpath: A Loop-Free Multipath Routing Algorithm
• Receiver Initiated Multiple Access for Ad Hoc Networks
• Group Coordination Protocol for Networked Multimedia Systems
• System and Method for Ad Hoc Network Access Employing the Distributed Election of a Shared Transmission Schedule
• Tree-Based Ordered Multicasting in Computer Networks
• HIDRA: Method for Hiding Mobility, Multiplexing, and Multi-Homing from Internet Applications

Tech ID/UC Case

10183/2000-314-0

Related Cases

2000-314-0

*Abstract

Medium-access control (MAC) protocols based on collision avoidance have become increasingly important over the past few years due to their simple applicability to wireless local-access networks (LANs) and ad hoc networks. In traditional collision-avoidance protocols, the transmitting node first sends a request-to-send (RTS) packet to the receiver. If the receiver receives this RTS correctly, the node responds with a clear-to-send (CTS) signal. In this system, a sender can transmit a data packet only after successfully receiving a CTS. However, to prevent data packets from colliding with other packets, the senders must sense the channel before sending the RTS. This carrier sensing or assignment of unique codes to nodes ensures that the intended receivers hear data packets without interference from hidden sources. However, this can greatly limit the applicability of these systems because the senders and receivers must find each other's codes before communicating with one another.

*IP Issue Date

Feb 21, 2006

*Principal Investigator

Name: Jose Joaquin(JJ Garcia-Luna-Aceves

Department:

Name: Asimakis Tzamaloukas

Department:

Country/Region

USA