Enabling down link reception of system and control information from intra-frequency neighbors without gaps in the serving cell in evolved-UTRA systems

Patent metadata

Field	Value
Publication number	US-9516580-B2
Application number	US-4877708-A
Country	US
Kind code	B2
Filing date	Mar 14, 2008
Priority date	Mar 19, 2007
Publication date	Dec 6, 2016
Grant date	Dec 6, 2016

Abstract

Simplified communication between user equipment and a neighboring cell not the primary cell is achieved by restricting the transmission parameters, such as bandwidth, of the neighboring cell transmission and provision of a simplified secondary baseband processor in the user equipment.

First claim

What is claimed is:

1. A method of periodically broadcasting system information of radio frequency communication between a user equipment and a plurality of base stations, comprising the steps of:
communicating primary data between a primary base station and the user equipment using a primary frequency sub-band having a first bandwidth;
periodically broadcasting system information by each base station about a cell served by the base station using a secondary frequency sub-band having a second bandwidth less than the first bandwidth;
receiving at the user equipment said broadcast information from a primary base station serving the cell including the user equipment using simplified baseband processing relative to said step of communicating between the user equipment and the primary base station; and
receiving at the user equipment said broadcast information from a secondary base station other than the primary base station using simplified baseband processing relative to said step of communicating primary data between the user equipment and the primary base station without gaps in communicating primary data with the primary base station and while remaining fully connected to the primary base station.

2. The method of claim 1 , wherein:
said primary data includes two-way voice and data.

3. The method of claim 1 , wherein:
said second bandwidth is 1.25MHz.

4. The method of claim 1 , wherein:
said step of transmitting data at the secondary base station using a restricted frequency band includes transmitting random access channel parameters.

5. The method of claim 1 , wherein:
said step of transmitting data at the secondary base station using a restricted frequency band includes transmitting system numbers.

6. The method of claim 1 , wherein:
said step of transmitting data at the secondary base station using a restricted frequency band includes transmitting power control parameters.

7. The method of claim 6 , wherein:
said power control parameters include reference signal (RS) transmission power at the secondary base station for pathloss estimation.

8. The method of claim 6 , wherein:
said power control parameters include load indicator.

9. The method of claim 6 , wherein:
said power control parameters include a power signal to noise ratio gap between serving and non-serving user equipment.

10. The method of claim 1 , wherein:
said step of communicating between the secondary base station and the user equipment includes transmitting data at the secondary base station in scheduling units with different frequencies.

11. The method of claim 1 , wherein:
said step of communicating between the secondary base station and the user equipment includes using data from said secondary base station at the user equipment to coordinate handoff of the user equipment from the primary base station to the secondary base station.

12. A method periodically broadcasting system information of radio frequency communication between user equipment and a plurality of base stations, comprising the steps of:
communicating primary data between a primary base station and the user equipment via a two-way synchronized channel; and
communicating between at least one secondary base station differing from the primary base station and the user equipment via a one-way non-synchronized channel without gaps in communicating primary data with the primary base station.

13. A user equipment for radio frequency communication between a user equipment and a plurality of base stations, comprising:
an antenna;
a radio frequency transceiver connected to said antenna; and
a baseband processor coupled to said radio frequency transceiver for communicating primary data between a primary base station and the user equipment via a two way synchronized channel, and for communicating between at least one secondary base station differing from the primary base station and the user equipment via a one way non synchronized channel without gaps in communication primary data with the primary base station.

14. The user equipment of claim 13 , wherein:
said secondary baseband processor can process a limited bandwidth relative to said primary baseband processor.

Assignees

• Kangude Shantanu
• Bertrand Pierre
• Varadarajan Badri N
• Texas Instruments Inc

Inventors

• Kangude Shantanu
• Bertrand Pierre
• Varadarajan Badri N

Classifications

• H04L5/0007

  the frequencies being orthogonal, e.g. OFDM(A) or DMT · CPC title

• H04W48/12 Primary

  using downlink control channel · CPC title

• H04W56/00

  Synchronisation arrangements · CPC title

• H04L27/2613 Primary

  Structure of the reference signals · CPC title

• H04W36/04

  Reselecting a cell layer in multi-layered cells · CPC title