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Resolving ambiguity of local area codes when dialling from a mobile device to a landline number Disclosure Number: IPCOM000243009D
Publication Date: 2015-Sep-08
Document File: 4 page(s) / 209K

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The Prior Art Database


Disclosed is a system is that allows mobile phone users to identify local area codes for landline numbers based on their location, including ambiguous situations where there may be two or more possible local area codes.

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Resolving ambiguity of local area codes when dialling from a mobile device to a landline number

    The core idea is to use the physical location of a mobile device to determine the local area dialling code for landline numbers in the immediate vicinity of a mobile device, and insert this determined local area code at the point the user is dialling only the short local number. Existing solutions do not handle the ambiguity that occurs when the user is at a location which may initially appear to be in one local area code zone when in fact they may be in a neighbouring local area code zone, or located near the intersection between two or more zones.

    Sometimes, mobile phone users need to call landline based telephone numbers, in the locality where they are calling from, and the complete telephone number including the local area code may not be known. For example, a number on a business card may be prefixed by a place name (e.g. Winchester 123456), or on a local business sign, simply omitted. In these situations, the user cannot make a call to these local numbers from their mobile phones without discovering the correct local area code. Even when a connection to the internet is available, looking up the local area code assumes some knowledge about the region and how its area codes are allocated.

    A typical embodiment of the system would be as described in the following steps:

    1. A mobile phone user wishes to telephone a landline in the local area, but does not know the local area dialling code.

    2. The mobile phone uses any one or combination of existing location detection techniques such as GPS (global positioning system), Wi-Fi, network mast ID techniques, etc. to determine its location.

    3. The user then enters only the desired number, omitting the local area code and initiates the call, as normal. See Figure 1.

    4. The location of the mobile phone is used to lookup (either in a table stored in the phone or via cellular connection to an internet service) the corresponding local area code for the landline network. In the majority of cases the location will correspond unambiguously with a single local area code, as shown in Figure 1.

Figure 1.

    However in some circumstances (for example when the mobile phone is located near the intersection of two or more local area code regions) the phone

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returns multiple local area codes.

    5. The mobile phone detects that the number being dialled is short and attempts to insert the determined local area code prefix. If a single local area code has been returned then the phone initiates the call. If multiple options for a local area code are returned then these are presented to the mobile phone user to choose from. To assist the user to pick the intended number with the correct local area code, the choices can be given more context by augmenting them with additional information.

This additional information could include the town or city name associated

with a local area code. If the mobile is con...