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Transmission of uplink reference signals

A link reference signal, transmit power technology, applied in the field of computer program products, can solve the problems of SRS transmission of multiple OFDM symbols, increased overhead and delay, high path loss, etc.

Pending Publication Date: 2020-12-04
TELEFON AB LM ERICSSON (PUBL)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the SRS transmission is periodic, it is typically configured using higher layer signaling (e.g. Radio Resource Control RRC) and thus cannot be updated very quickly (e.g. to track fast fading)
However, for network nodes it is possible to adapt the SRS transmission to more robust schemes such as figure 1 The schemes shown in (a) and 1(b) in order to cope with long-term channel characteristics such as high path loss
[0007] figure 1 A disadvantage of the two methods shown is that SRS transmission requires multiple OFDM symbols
This will add overhead and latency
[0008] Furthermore, reducing the sounding bandwidth of the SRS results in the network node will only have channel estimates for a part of the frequency band
If the radio propagation channel is frequency selective, the detected frequency band may belong to a relatively poor part of the frequency band, which will reduce the link budget of SRS as well as the DL performance

Method used

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  • Transmission of uplink reference signals
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  • Transmission of uplink reference signals

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Embodiment Construction

[0036] The inventive concept will now be described more fully hereinafter with reference to the accompanying drawings, in which certain embodiments of the inventive concept are shown. However, inventive concepts may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided by way of example so that this disclosure will be thorough and complete , and fully convey the scope of the inventive concept to those skilled in the art. Throughout the specification, like numerals refer to like elements. Any steps or features shown in dashed lines should be considered optional.

[0037] figure 2 is a schematic diagram illustrating a communication network 100 in which embodiments presented herein may be applied. The communication network 100 may be a third generation (3G), fourth generation (4G) or fifth generation (5G) telecommunication network, and support any 3GPP telecommunication standard a...

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Abstract

There is provided mechanisms for transmitting uplink reference signals. A method is performed by a terminal device. The method comprises obtaining, from a network node, a configuration of transmissionof the uplink reference signals. The configuration comprises an indication of a first frequency interval in which the uplink reference signals are to be transmitted. The method comprises distributingtransmission power available for transmitting the uplink reference signals over the first frequency interval based on channel information for the first frequency interval. The method comprises transmitting the uplink reference signals in accordance with the distributed transmission power.

Description

technical field [0001] Embodiments presented herein relate to methods, terminal devices, computer programs, and computer program products for transmitting uplink reference signals. Embodiments presented herein also relate to methods, network nodes, computer programs, and computer program products for initiating transmission of uplink reference signals. Background technique [0002] In communication networks, it can be challenging to achieve good performance and capacity for a given communication protocol, its parameters, and the physical environment in which the communication network is deployed. [0003] Some communication networks are deployed for time division duplex (TDD). One benefit of TDD (compared to Frequency Division Duplex (FDD)) is that TDD enables reciprocity-based beamforming, which can be applied on both the network side (i.e., for downlink DL) and the user side (i.e., , for uplink UL) both. For reciprocity-based DL transmission, the terminal device on the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W52/42H04W52/24H04W52/34H04W52/14H04W52/32H04L5/00
CPCH04L5/0048H04W52/146H04W52/245H04W52/325H04W52/34H04W52/42H04L5/0051H04W52/367
Inventor A·尼尔松S·法克斯埃尔N·维尔纳松
Owner TELEFON AB LM ERICSSON (PUBL)