Method and device for adjusting distribution positions of frequency-domain resources

Abstract

The invention relates to the communication field, and discloses a method and device for adjusting distribution positions of frequency-domain resources, so as to ensure signal quality of a terminal when an uplink transmission is performed based on discontinuous frequency-domain resources. The method comprises the following steps: in a case that the uplink transmission is performed by using discontinuous frequency-domain resources in an LTE-A (long term evolution-advanced) system, a terminal can obtain a corresponding largest frequency-domain interval according to a network-environment-based MPR (multiple protocol router) threshold value; and then based on the largest frequency-domain interval, the distribution positions of discontinuous frequency-domain resources used by the terminal are adjusted, so as to ensure the interval between each frequency-domain resource not to exceed the determined largest frequency-domain interval. Therefore, when signals are transmitted on the adjusted discontinuous frequency-domain resources, out-of-band emission due to inter-modulation (IMD) generated between each frequency-domain resource is effectively reduced, and thus the transmission quality of uplink signals are ensured, so that adverse effects to system coexistence and system performance are avoided while gain for user performance brought by the discontinuous frequency-domain transmission is fully used.

Description

technical field [0001] The present invention relates to the communication field, in particular to a method and device for adjusting the distribution position of frequency domain resources. Background technique [0002] In the LTE system based on the Rel-8 protocol, the uplink transmission is a centralized transmission. For example, see figure 1 As shown, the so-called centralized transmission means that at the same time, the terminal transmits uplink signals in a continuous frequency domain resource, wherein the uplink PUSCH (Physical Uplink Shared Channel) and PUCCH (Physical Uplink Control Channel) are time-division, that is, not in transmitted in the same subframe. [0003] However, in the LTE-A system, uplink transmission is allowed on discontinuous frequency domain resources. refer to figure 2 As shown, uplink transmission will be performed on discontinuous frequency domain resources in the following three cases: [0004] 1) PUSCH and PUCCH are transmitted simulta...

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Problems solved by technology

[0009] 1. In-band leakage; in this case, the intermodulation products mainly fall within the frequency band; for example, image 3 IMD 2f2-f1 shown in

[0010] 2. Out-of-band leakage: In this case, intermodulation products mainly fall in adjacent channels outside the band; for example, image 3 IMD 2f1-f4, IMD 2f1-f2 and IMD 2f2-f3 shown in

[0011] 3. Spurious leakage: In this case, the intermodulation products mainly fall in the channels far outside the frequency band

[0018] Although scheme 2 does not impose any restrictions on the use of frequency domain resources for uplink transmission, since uplink transmission is allowed based on discontinuous frequency domain resources, the flexibility of frequency domain resource scheduling is increased. In various scenarios, If the terminal is required to determine the specific MPR for each part of the frequency domain resources, it will increase the implementation complexity of the terminal and reduce the performance of the terminal; further, if the terminal sets an excessively high MPR, it will also affect the signal quality of the terminal

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