Diversity enhancement in a multiple carrier system

Patent metadata

Field	Value
Publication number	US-10285159-B2
Application number	US-201414531625-A
Country	US
Kind code	B2
Filing date	Nov 3, 2014
Priority date	Nov 5, 2013
Publication date	May 7, 2019
Grant date	May 7, 2019

Abstract

Diversity enhancement for multiple carrier systems is disclosed which includes generation of a multiplexed multicarrier radio frequency (RF) signal having N carriers organized to be accessed at a rate of one carrier access per multicast channel (MCH) scheduling period (MSP) per carrier of the N carriers, thereby requiring N accesses per MSP duration across the N carriers. The method may also include the base station transmitting the RF signal to a user equipment (UE). In other aspects, the diversity enhancements include the UE receiving a multiplexed multicarrier RF signal having N carriers. The UE may access the N carriers by performing one carrier access per MSP per carrier of the N carriers, thereby performing N accesses per MSP duration across the N carriers.

First claim

What is claimed is:

1. A method of wireless communication, the method comprising:
receiving, by a user equipment (UE), a multiplexed multicarrier radio frequency (RF) signal having N carriers, wherein N is an integer greater than or equal to two; and
accessing, by the UE, the N carriers by performing one carrier access per multicast channel (MCH) scheduling period (MSP) of time per carrier of the N carriers, thereby performing N accesses per MSP duration across the N carriers, wherein accessing the N carriers includes at least one of:
concurrently accessing a collection of multicast transport channels (MTCHs), wherein the MTCHS of the collection are configured to be adjacent in time in an ordering of the MTCHs within the MSP,
completing access on one of the N carriers at least a predefined amount of time before access on another of the N carriers,
accessing adjacent frequency segments at least partly non-sequentially so as to reduce temporal correlation of adjacent frequencies by minimizing access of adjacent frequencies,
utilizing a single MTCH temporary mobile group identifier (TMGI) across the N carriers;
utilizing MTCH TMGIs that are unique per carrier, and that are combined by one or more upper layers, or
receiving MTCHs that are scheduled such that defined services are accessible by a single modem resource.

2. The method of claim 1 , wherein the MSPs and respective MCH scheduling information (MSI) thereof are staggered in time across the N carriers so as to be asynchronous.

3. The method of claim 2 , wherein an order of multicast transport channels (MTCHs) within each MSP is predetermined across the N carriers within respective MSP durations thereof, and wherein the accessing the N carriers includes inferring a resource of an MSI for one of the N carriers from another resource of another MSI for another of the N carriers based on a static time offset across the N carriers between resources of respective multicast transport channels (MTCHs) of the N carriers.

4. The method of claim 2 , wherein positions of non-hopping multicast transport channels (MTCHs) are fixed relative to positions of frequency hopping MTCHs across the N carriers within the respective MSP durations thereof.

5. The method of claim 1 , wherein the MSPs and respective MCH scheduling information (MSI) thereof are aligned in time across the N carriers so as to be synchronous.

6. The method of claim 5 , wherein the accessing the N carriers includes at least one of:
obtaining a description of all of the N carriers per carrier in a common MSI; or
inferring a resource of an MSI for one of the N carriers from another resource of another MSI for another of the N carriers based on a static time offset across the N carriers between resources of respective multicast transport channels (MTCHs) of the N carriers.

7. The method of claim 5 , wherein an order of multicast transport channels (MTCHs) is rotated across the N carriers within a given MSP, and wherein positions of non-hopping multicast transport channels (MTCHs) are fixed relative to positions of frequency hopping MTCHs across the N carriers within respective MSPs thereof.

8. The method of claim 1 , wherein accessing the N carriers includes concurrently accessing the collection of MTCHs, wherein the MTCHS of the collection are configured to be adjacent in time in the ordering of the MTCHs within the MSP.

9. The method of claim 1 , wherein accessing the N carriers includes completing access on one of the N carriers at least a predefined amount of time before access on another of the N carriers.

10. The method of claim 1 , wherein accessing the N carriers includes accessing adjacent frequency segments at least partly non-sequentially so as to reduce temporal correlation of adjacent frequencies by minimizing access of adjacent frequencies.

11. The method of claim 1 , wherein accessing the N carriers includes utilizing the single MTCH TMGI across the N carriers.

12. The method of claim 1 , wherein accessing the N carriers includes utilizing MTCH TMGIs that are unique per carrier, and that are combined by one or more upper layers.

13. The method of claim 1 , wherein accessing the N carriers includes receiving MTCHs that are scheduled such that defined services are accessible by the single modem resource.

14. A method for wireless communication, the method comprising:
generating, by a base station, a multiplexed multicarrier radio frequency (RF) signal having N carriers organized to be accessed at a rate of one carrier access per multicast channel (MCH) scheduling period (MSP) of time per carrier of the N carriers, thereby requiring N accesses per MSP duration across the N carriers, wherein N is an integer greater than or equal to two, wherein generating the RF signal includes at least one of:
scheduling access of adjacent frequency segments to be at least partly non-sequential so as to reduce temporal correlation of adjacent frequencies by minimizing access of adjacent frequencies by the UE,
maintaining a single multicast transport channel (MTCH) temporary mobile group identifier (TMGI) across the N carriers,
maintaining MTCH TMGIs that are unique per carrier, and that are combined by one or more upper layers,
scheduling the MSPs and respective MCH scheduling information (MSI) thereof according to a rule ensuring that a single device modem resource never has to exceed total allowable reception time, T r , calculated according to:
T r =(MSP−MSI)− N * Transition Time per carrier,

where MSP represents duration of the MSP, and MSI represents time required to read the MCH scheduling information,
scheduling multicast transport channels (MTCHs) during the MSPs and respective MCH scheduling information (MSI) thereof according to a rule ensuring that total elapsed time for a desired collection of MTCHs on any of the N carriers does not exceed a threshold, T c , calculated as follows:
T c =(MSP−MSI)/ N −Transition Time,

where MSP represents duration of the MSP, and MSI represents time required to read the MCH scheduling information, the rule further ensuring that the total elapsed time does not overlap itself in a collection sense on another of the N carriers, including the transition time,
scheduling MTCHs such that defined services are accessible by a single modem resource, or scheduling MTCHs according to a minimum requirement that all MTCHs in one service meet all scheduling restrictions; and
transmitting, by the base station, the RF signal to a user equipment (UE).

15. The method of claim 14 , wherein generating the RF signal includes organizing the N carriers such that the MSPs and respective MCH scheduling information (MSI) thereof are staggered in time so as to be asynchronous.

16. The method of claim 15 , wherein organizing the N carriers includes one of:
organizing the N carriers such that an order of multicast transport channels (MTCHs) within each MSP is predetermined within respective MSP durations thereof;
organizing the N carriers such that a resource of an MSI for one of the N carriers may be inferred from another resource of another MSI for another of the N carriers by enforcing scheduling rules based on a static time offset across the N carriers between resources of respective MTCHs of the N carriers; and
organizing the N carriers such that positions of non-hopping MTCHs are fixed relative to positions of frequency hopping MTCHs within the respective MSP durations thereof.

17. The method of claim 14 , wherein generating the RF signal includes organizing the N carriers such that the MSPs and

Assignees

• Qualcomm Inc

Inventors

• Walker Gordon Kent
• Gholmieh Ralph Akram
• Wang Jun
• Zhang Xiaoxia
• Lee Kuo-Chun
• Naik Nagaraju

Classifications

• H04W72/30 Primary

  Resource management for broadcast services · CPC title

• H04W72/535

  based on resource usage policies · CPC title

• H04W72/12

  Wireless traffic scheduling · CPC title

• H04L5/0044 Primary

  Allocation of payload; Allocation of data channels, e.g. PDSCH or PUSCH · CPC title

• H04L27/263

  modification of IFFT/IDFT modulator for performance improvement · CPC title