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SP with dual Bluetooth physical layer PHY using a same link layer LL protocol

IP.com Disclosure Number: IPCOM000243894D
Publication Date: 2015-Oct-27
Document File: 3 page(s) / 152K

Publishing Venue

The IP.com Prior Art Database

Abstract

Wireless standardized connectivity between hearing aid devices and commercial appliances is increasingly popular with end users Reliable wireless audio and data links are created between the smart phone the multi media device the remote control and the hearing aid device The hearing aid device is often referred to as the sound processor or the behind the ear hearing aid device Such devices may be part of a larger implantable hearing aid system A system or method is needed that enables a hearing aid system to simultaneously support multiple wireless streaming connections

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Title

SP with dual Bluetooth® physical layer (PHY) using a same link layer (LL) protocol

Problem Addressed 

Wireless standardized connectivity between hearing aid devices and commercial appliances is increasingly popular with end users.  Reliable wireless audio and data links are created between the smart phone, the multi-media device, the remote control, and the hearing aid device.  The hearing aid device is often referred to as the sound processor or the behind-the-ear hearing aid device.  Such devices may be part of a larger implantable hearing aid system.

A system or method is needed that enables a hearing aid system to simultaneously support multiple wireless streaming connections.

Known Solutions/Approaches

Various Bluetooth® and Bluetooth® Low Energy[1] connections are simultaneously established and maintained in the hearing aid device.  The device, playing a master role, typically distributes a time anchor point at regular intervals.  The slave locks to this time anchor point and becomes synchronized[2].

The hearing aid device in a master role (i.e. master of timing) sometimes needs to accept that a ‘slave’ role might be simultaneously enforced due to certain restrictions of the participating Bluetooth® based peripherals.  Unfortunately, the link layer (LL) cannot simultaneously handle this and the associated protocol (L2CAP) in case of one single physical layer (PHY).  Even if that were possible, it would be impossible to synchronize all connected Bluetooth® devices of a hearing aid system to one single anchor point in time.

 

Figure 1: Various Bluetooth® based connections are established and maintained simultaneously on the hearing aid device

Therefore, the hearing aid device may integrate two wireless communication units or transceivers.  Both communication units use the same communication protocol or stack (PHY +LL + L2CAP).  Both units may accept the slave or master role of the wireless connection, independently of each other.  The transfer of the wireless packets from the communication units toward the nodes (i.e. devices) is not synchronized in time[3].

More restrictive would be that the hearing device is a master that distributes a time anchor point at regular intervals and a...