2006 New communication protocol for random access networks

A new communication protocol for random access networks has been conceived, which can be applied to both local and wide area scenarios. 

A new communication protocol for random access networks has been conceived, which can be applied to both local and wide area scenarios. The novelty of this protocol is that, by analyzing directly the signal produced during a collision, it can determine the source node for each collided packet, inform all active nodes in the networks and then organize very efficiently the retransmission process. This protocol offers efficient bandwidth usage, fast access delay and easy implementation, thus becoming a potentially cost-effective market solution.

The application field encompasses different areas within Information and Communication Technologies, such as: Satellite networks, Radio-access networks, Optical access networks, Wireless sensor networks, Cellular systems (in signalingchannels, for instance).


The protocol that has been conceived encompasses the physical layers and those that link to the model OSI ("Open Systems Interconnection"), since the detection of collisions and the organization of the retransmissions is carried out after analyzing directly the signal resulting of the collision of several packages. The basic principle behind it is that every station leaves its mark in every package sent, in the form of a specific sequence of transmission cutting bits. This mark identifies every station univocally. In the event of collision, the analyzer device is capable of determining the stations implicated from the overlap signal, being able to transfer this information to all the active stations of the network. Therefore, all the stations obtain the maximum information on the event of collision, something that allows a fast, efficient and impartial organization of the retransmissions following a previously established planning algorithm. All that allows reaching a high efficiency of the channel, since the packages must be broadcast no more than once (with 100% guarantee of not experiencing a new collision), and a reduced average delay of access at the same time, since the use of algorithms of random and persistent retransmission, that inherently slow down the communication with the recipient, is not necessary.

Main advantages

  • Realizable in high-speed environments
  • High efficiency in bandwidth consumption
  • Mean delays with reduced access and almost independent of global network traffic
  • Simple implementation, especially in the case of client stations


  • Harnessing the collided signal to extract information from the collision
  • The ability to determine the origin of all packages collided in contrast to existing protocols which only detect the fact of collision itself or at most discriminate one of the signals discarding al the rest (phenomena of capture)

Actual State

At present the technology concerning the access protocols has reached its maturity in some areas, as the local area networks, or the satellite communications, although not necessarily the solutions that occur there represent the best balance among all the aspects of behaviour indicated previously. However, even in these areas, the strategy used in the protocol that we suggest can replace, complement or even improve the existing solutions.

On the other hand, there are newer areas where the definition of new protocols is crucial; therefore, the suggested solution acquires special importance. This is the case, for example, of the optical access networks or the sensors networks.

The proposed protocol has been registered as a national patent application at the Spanish Patent and Trademark Office and is currently owned by the University of Balearic Islands. 

This technological offer may be of interest to companies in the field of information technology and communications, especially those involved in the development of both communication protocols between devices located in remote locations and small coverage areas. Therefore, the focus is on finding a company that is willing to:

  • Participate as a partner in a joint project aimed at developing a prototype
  • Commercial exploitation of the patent

Amb la col·laboració de:

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