Assigning mobile users in a half-frequency division duplex (HFDD) system to uplink (UL) sub-frames and to downlink (DL) sub-frames
US8130682B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 18, 2009 |
| Grant date | Mar 6, 2012 |
| Priority date | — |
| Expiry date | Feb 25, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W72/0453
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Methods assigning mobile users in a half-frequency division duplex (HFDD) system to a first UL group and second UL group of an uplink (UL) sub-frame, and to a first DL group and a second DL group of a downlink (DL) sub-frame, wherein the UL sub-frame is assigned a first carrier frequency and the DL sub-frame is assigned a second carrier frequency, are disclosed. One method includes determining a type of data, determining a receive CINR (carrier interference plus noise ratio), and determining a Doppler frequency parameter, for each mobile user of a plurality of mobile users. The plurality of mobile users to are assigned to the first UL group, the second UL group, the first DL group and the second DL group based on time durations of the first UL group, the second UL group, the first DL group and the second DL group, and based on and at least one of the data type, CINR, Doppler frequency spread of the mobile user, and a number of mobile users previously assigned to the first UL group, the second UL group, the first DL group and the second DL group.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.