Location information in a communications system

1. A communication method between a first user terminal and a second user terminal the method comprising:

displaying, by the first user terminal, a list of contacts associated with a first user of the first user terminal, the list of contacts comprising a contact representing a second user of a the second user terminal;

generating, by the first user terminal, a first location message comprising an indication of a location of the first user, wherein the first user terminal generates the indication of the location of the first user and the first location message without interaction of the first user with the first user terminal;

determining that the second user is authorized to receive the location message;

responsive to the determination, causing the first location message to be transmitted to the second user terminal;

in response to a push operation initiated at the second user terminal independent of input by the second user, receiving, by the first user terminal, a second location message including a location of the second user; and

displaying, by the first user terminal, a visual indication of the location of the second user in association with the contact representing the second user.

2. The method as described in claim 1 , wherein first user terminal is a mobile user terminal associated with the first user.

3. The method as described in claim 1 , wherein the location of the first user is determined using a Global Positioning System.

4. The method as described in claim 1 , wherein the location of the first user is determined using an Internet Protocol address of the first user terminal.

5. The method as described in claim 1 , wherein the location of the first user defines a geographical region of variable size.

6. The method as described in claim 5 , wherein a size of the geographical region is set in response to an input received from the first user.

7. The method as described in claim 5 , wherein a size of the geographical region is set by the first user terminal.

8. The method as described in claim 7 , wherein the size of the geographical region is dependent upon a distance between the location of the first user determined at the first user terminal and a home location of the first user.

9. The method as described in claim 7 , wherein the location of the first user defines a geographical region of variable size.

10. The method as described in claim 9 , wherein a size of the geographical region is at least one of:

set by an input received from the first user;

set by the first user terminal; or

dependent upon a distance between the location of the first user determined at the first user terminal and a home location of the first user.

11. The method as described in claim 1 , wherein the first location message includes a time zone associated with the location of the first user determined at the first user terminal.

12. The method as described in claim 1 , wherein the the push operation comprises a periodic update from the second user terminal with contact information pertaining to the contact representing the second user.

13. A device comprising:

one or more processors;

memory having stored thereon computer readable instructions that are executable by the one or more processors to implement a communication client to perform operations comprising:

displaying, by the first user terminal, a list of contacts associated with a first user of the first user terminal, the list of contacts comprising a contact representing a second user of the second user terminal;

generating, by the first user terminal, a first location message comprising an indication of a location of the first user, wherein the first user terminal generates the indication of the location of the first user and the first location message without interaction of the first user with the first user terminal;

determining that the second user is authorized to receive the location message;

responsive to the determination, transmitting the first location message to the second user terminal;

in response to a push operation initiated at the second user terminal independent of input by the second user, receiving, by the first user terminal, a second location message including a location of the second user; and

displaying, by the first user terminal, a visual indication of the location of the second user in association with the contact representing the second user.

14. A device as recited in claim 13 , wherein a size of the geographical region is set in response to an input received from the first user.

15. A memory having stored thereon computer readable instructions that are executable to perform operations comprising:

displaying, by the first user terminal, a list of contacts associated with a first user of the first user terminal, the list of contacts comprising a contact representing a second user of the second user terminal;

generating, by the first user terminal, a first location message comprising an indication of a location of the first user, wherein the first user terminal generates the indication of the location of the first user and the first location message without interaction of the first user with the first user terminal:

determining that the second user is authorized to receive the location message,

responsive to the determination, transmitting the first location message to the second user terminal;

in response to a push operation initiated at the second user terminal independent of input by the second user, receiving, by the first user terminal, a second location message including a location of the second user; and

displaying, by the first user terminal, a visual indication of the location of the second user in association with the contact representing the second user.