US2008117835A1

5G,4G,3G

Title

Method and apparatus for time-aligning transmissions from multiple base stations in a CDMA communication system

Application Number:

US20080019596

Publication Date:

22-05-2008

Current Assignee:

Family ID:

Application Date:

24-01-2008

Publication Country:

US

Priority Date:

09-07-2001

Declaring Company:

Abstract  Abstract

Schemes to time-align transmissions from multiple base stations to a terminal. To achieve time-alignment differences between the arrival times of transmissions from the base stations as observed at the terminal are determined and provided to the system and used to adjust the timing at the base stations such that terminal-specific radio frames arrive at the terminal within a particular time window. In one scheme a time difference between two base stations is partitioned into a frame-level time difference and a chip-level time difference. Whenever requested to perform and report time difference measurements the terminal measures the chip-level timing for each candidate base station relative to a reference base station. Additionally the terminal also measures the frame-level timing and includes this information in the time difference measurement only if required. Otherwise the terminal sets the frame-level part to a predetermined value (e.g. zero).

Note:

The information in blue was extracted from the third parties (Standard Setting Organisation, Espacenet)

The information in grey was provided by the patent holder

The information in purple was extracted from the FrandAvenue

Explicitly disclosed patent:openly and comprehensibly describes all details of the invention in the patent document.

Implicitly disclosed patent:does not explicitly state certain aspects of the invention, but still allows for these to be inferred from the information provided.

Basis patent:The core patent in a family, outlining the fundamental invention from which related patents or applications originate.

Family member:related patents or applications that share a common priority or original filing.