Method and apparatus for facilitating reference signal transmission
A reference signal and signal technology, which is applied to the separation device, synchronization device, pilot signal distribution and other directions of the transmission path, can solve problems such as system performance degradation, and achieve the effect of minimizing the impact and minimizing the adverse impact.
Inactive Publication Date: 2019-02-05
TELEFON AB LM ERICSSON (PUBL)
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However, in traditional CA methods, system performance may degrade
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[0045] Hereinafter, the principles and spirit of the present disclosure will be described with reference to illustrative embodiments. It should be understood that all these embodiments are provided only for those skilled in the art to better understand and further practice the present disclosure, rather than to limit the scope of the present disclosure. For example, features illustrated or described as part of one embodiment can be used with another embodiment to yield a still further embodiment. In the interest of clarity, not all features of an actual implementation are described in this specification.
[0046] References in the specification to "one embodiment," "an embodiment," and "example embodiment" indicate that the described embodiments may include a particular feature, structure, or characteristic, but not that every embodiment does not necessarily include that particular feature , structure, or property. Furthermore, such phrases are not necessarily referring to t...
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Embodiments of the present disclosure provide methods, apparatuses and computer program for facilitating reference signal transmission. An example method can be implemented at a base station in a wireless communication system for communicating with a terminal device. The terminal device is configured with a primary carrier and a secondary carrier for carrier aggregation. The method comprises determining a measurement gap. The measurement gap indicates a time interval for a terminal device to switch from the primary carrier to the secondary carrier for transmitting a reference signal to the base station over the secondary carrier and switch back to the primary carrier. The method also comprises triggering the terminal device to transmit the reference signal over the secondary carrier according to the measurement gap and obtaining a channel estimation based on the reference signal received from the terminal device during the measurement gap. By virtue of the method, the base station is enabled to request and control reference signal transmission on a secondary carrier from the terminal device, thereby obtaining CSI of the secondary carrier. Furthermore, since transmission of the reference signal is restricted to the measurement gap known by the base station, negative impact to the primary carrier can be minimized.
Description
technical field [0001] The non-limiting and exemplary embodiments of the present disclosure relate generally to the technical field of wireless communications, and in particular to methods, apparatus and computer programs for facilitating transmission of reference signals. Background technique [0002] This section introduces aspects that may facilitate a better understanding of the disclosure. Accordingly, the statements in this section should be read as such and should not be construed as an admission of what is or is not prior art. [0003] In mobile communication systems, in order to improve data rate and signal transmission / reception performance, multi-antenna technology has been widely used. For example, signals transmitted from multiple antennas can be weighted in amplitude and phase through beamforming to produce spatial selectivity, i.e., constructive signal power gain in desired directions and zero in other directions or attenuated interfering power. [0004] Ei...
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IPC IPC(8): H04L5/00
CPCH04L5/001H04L5/0023H04L5/0085H04L5/1469H04L27/2655H04W56/001H04L5/0051H04L5/0096H04B7/0686H04L25/0224H04L5/00H04L5/0091H04B7/00H04W24/02H04B17/30H04B7/0617H04L5/0048H04L25/0202H04W74/0833
Inventor 缪庆育朱怀松汪剑锋
Owner TELEFON AB LM ERICSSON (PUBL)