Preference lists for assistance data requests in global navigation satellite systems

A method comprising:

• receiving at an assistance server satellite navigation data corresponding to at least one satellite in a global navigation satellite system;
• receiving an assistance data request from a receiver;
• identifying at least one ordered list of preferred navigation models for the receiver, wherein the list is ordered according to navigation model preference;
• receiving from the receiver an identifier corresponding to a satellite data signal;
• determining that said satellite data signal is one of a plurality of satellite data signals received at the assistance server;
• selecting a navigation model based on the identified ordered list of preferred navigation models for the receiver, and based on supported capabilities at the assistance server;
• and
• transmitting a response to said assistance data request, said response comprising assistance data associated with said satellite data signal, wherein said assistance data is formatted in accordance with the selected navigation model.

An apparatus comprising:

• a processor;
• and
• a memory in communication with the processor and having computer executable instructions stored therein;
• wherein the computer executable instructions, when executed by the processor, are configured to cause the apparatus to:
• create a list of preferred navigation models for the apparatus;
• transmit the list of preferred navigation models;
• transmit an assistance data request;
• receive a response to said assistance data request, said response comprising assistance data associated with a satellite signal, wherein said assistance data is formatted in accordance with at least one of the list of preferred navigation models;
• wherein creating the list of preferred navigation models for the apparatus comprises:
• identifying a plurality of navigation model types supported at the apparatus, wherein the plurality of navigation model types include at least one of:
• orbit models,
• clock models, and
• almanac models,
• for each of the plurality of navigation model types,
• identifying one or more suitable navigation models for said navigation model type, and
• determining an order for the one or more suitable navigation models for assistance data based on preferences for said navigation model type;
• and
• creating an ordered first data structure comprising identifiers for each of the suitable navigation models for each navigation model type, wherein the first data structure is ordered based on preferences for each of the navigation model types.

An apparatus comprising:

• a processor;
• and
• a memory in communication with the processor and having computer executable instructions stored therein;
• wherein the computer executable instructions, when executed by the processor, are configured to cause the apparatus to:
• receive satellite navigation data corresponding to at least one satellite in a global navigation satellite system;
• receive an assistance data request from a receiver;
• identify at least one ordered list of preferred navigation models for the receiver, wherein the list is ordered according to navigation model preference;
• receive from the receiver an identifier corresponding to a satellite data signal;
• determine that said satellite data signal is one of a plurality of satellite data signals received at the apparatus;
• select a navigation model based on the identified ordered list of preferred navigation models for the receiver, and based on supported capabilities at the apparatus;
• and
• transmit a response to said assistance data request, said response comprising assistance data associated with said satellite data signal, wherein said assistance data is formatted in accordance with the selected navigation model.

A computer program product comprising a non-transitory computer-readable storage medium that contains computer readable instructions that are configured to cause a device to perform at least the following:

• creating a list of preferred navigation models for a mobile receiver;
• transmitting the list of preferred navigation models;
• transmitting an assistance data request;
• and
• receiving a response to said assistance data request, said response comprising assistance data associated with a satellite data signal, wherein said assistance data is formatted in accordance with at least one of the list of preferred navigation models;
• wherein creating the list comprises:
• identifying a plurality of navigation model types supported at the mobile receiver, wherein the plurality of navigation model types include at least one of:
• orbit models,
• clock models, and
• almanac models;
• for each of the plurality of navigation model types,
• identifying one or more suitable navigation models for said navigation model type, and
• determining an order for the one or more suitable navigation models for assistance data based on preferences for said navigation model type;
• and
• creating an ordered first data structure comprising identifiers for each of the suitable navigation models for each navigation model type, wherein the first data structure is ordered based on preferences for each of the navigation model types.

A computer program product comprising a non-transitory computer-readable storage medium that contains computer readable instructions that cause a device to perform at least the following:

• receiving at an assistance server satellite navigation data corresponding to at least one satellite in a global navigation satellite system;
• receiving an assistance data request from a receiver;
• identifying at least one ordered list of preferred navigation models for the receiver, wherein the list is ordered according to navigation model preference;
• receiving from the receiver an identifier corresponding to a satellite data signal;
• determining that said satellite data signal is one of a plurality of satellite data signals received at the assistance server;
• selecting a navigation model based on the identified ordered list of preferred navigation models for the receiver, and based on supported capabilities at the assistance server;
• and
• transmitting a response to said assistance data request, said response comprising assistance data associated with said satellite data signal, wherein said assistance data is formatted in accordance with the selected navigation model.