Ofdma scheduling method for avoiding leakage at the mobile stations

A scheduler, mobile terminal technology, applied in advanced technology, network traffic/resource management, electrical components, etc., can solve problems such as the increase in the number of external SAWs, the large cost penalty of multi-band transceivers, etc., to reduce power consumption, computing Reduced complexity and reduced noise leakage

Active Publication Date: 2015-02-18
TELEFON AB LM ERICSSON (PUBL)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] Another problem is that the number of external SAWs will increase with increased band support, thus giving a large cost penalty for multi-band transceivers

Method used

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  • Ofdma scheduling method for avoiding leakage at the mobile stations
  • Ofdma scheduling method for avoiding leakage at the mobile stations
  • Ofdma scheduling method for avoiding leakage at the mobile stations

Examples

Experimental program
Comparison scheme
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Embodiment Construction

[0028] image 3 A scheduling scheme 300 is shown. The scheduler allocates uplink frequency carriers and downlink frequency carriers at a fixed duplex distance. The duplex distance is the distance (in Hz) between the uplink frequency carrier and the downlink frequency carrier. This means that if the mobile terminal 110, 120 uses the frequency carrier C2 UL for uplink, it will frequency carrier C2 DL For downlink traffic.

[0029] Ideally, a mobile terminal 110, 120 transmits all energy within its uplink frequency carrier. But in practical situations, some energy will leak 310 to adjacent frequency carriers. The leakage is larger for the nearest frequency carrier and decreases with increasing distance from the assigned frequency carrier.

[0030] In the future, mobile telecommunications may use the 700MHz band. One such band may be UMTS band XII, which uses band 698-716 MHz for uplink traffic and 728-746 MHz for downlink traffic. If fixed duplex distance scheduling is us...

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Abstract

The present invention relates to scheduling of uplink and downlink resources between mobile terminals (110) and a base station (130). To reduce the power leakage between the transmitter and the receiver of the mobile terminal (110), the scheduler allocated uplink frequency carriers and downlink frequency carriers with a larger duplex distance to those mobile terminals (110,120) that has to transmit with high power. This means that the requirements on the external SAW filter could be reduced.

Description

technical field [0001] The present invention relates to wireless communication systems, and more particularly, to reducing interference from RF transmitters on radio frequency (RF) communication systems. Background technique [0002] figure 1 An overview of the mobile communication system 100 is shown. The system comprises a plurality of mobile terminals 110, 120 connected to a plurality of base stations 130-1, 130-2, 130-3, 130-4. The mobile terminals 110, 120 may communicate with the base station 130 using Frequency Division Duplex (FDD) or Time Division Duplex (TDD). FDD means that all communications from the mobile terminals 110, 120 to the base station 130 are transmitted on a frequency band called the uplink band, while all data communications from the base station 130 to the mobile terminals 110, 120 are transmitted on a frequency band called the downlink. Transmit on another frequency band of the frequency band. TDD means that all communications between the mobil...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W72/08
CPCH04W88/08Y02B60/50H04W72/085H04W28/04Y02D30/70H04W72/542
Inventor F·蒂尔曼B·林多夫C·伯格尔容
Owner TELEFON AB LM ERICSSON (PUBL)
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