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Method for determining channel quality indicator (CQI), base station and user terminal thereof
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A technology of channel quality information and user terminals, applied in wireless communication, network traffic/resource management, digital transmission systems, etc., can solve problems such as time domain fluctuations, inability of users to know, inaccuracy, etc.
Active Publication Date: 2015-06-17
DATANG MOBILE COMM EQUIP CO LTD
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In order to meet the requirements for CQI, terminal equipment manufacturers mainly average the interference of multiple subframes to obtain the final interference value, and calculate CQI based on the final interference value, but use the averaged interference value or use the instantaneous value to obtain The interference value to calculate the CQI can only be determined according to the method set by the terminal equipment manufacturer, and the user does not know how to determine the interference value
[0006] In the 3GPP LTE Rel-10 system, the interference received by users in the interfered cell will fluctuate significantly in the time domain, and for R10 users, the interference value obtained by averaging is still instantaneous The user cannot know the interference value obtained by means of the R8 system. If the interference value is also obtained in the way of the R8 system, the CQI or CSI (Channel State Information, channel state information) obtained according to the interference value is inaccurate.
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Embodiment 1
[0075] In embodiment one, the above figure 2 with image 3 In the flow shown, the first base station is a Pico cell node, and the second base station is a MeNB cell node, and the interference generated by the MeNB cell node to the Pico cell node is greater than or equal to the set interference threshold.
[0076] The manner of determining the CQI in the first embodiment mainly includes the following steps:
[0077] Step 1. The MeNB cell node and the Pico cell node negotiate to obtain a set of time-domain subframes through the X2 or S1 interface.
[0078] Step 2, the Pico cell node acquires a set of time-domain subframes.
[0079] Step 3, the Pico cell node sends the obtained time domain subframe set to the interfered user terminal (such as cell edge user terminal).
[0080] Step 4, the Pico cell node sends an instruction message for characterizing the way of determining the interference value to the interfered user terminal in step 3 through high-level RRC signaling, or b...
Embodiment 2
[0084] In the second embodiment, the above process figure 2 with image 3 The first base station in is a MeNB cell node, the second base station is a HeNB cell node, and the interference generated by the HeNB cell node on the MeNB cell node is greater than or equal to a set interference threshold.
[0085] The manner of determining the CQI in the second embodiment mainly includes the following steps:
[0086] Step 1. The MeNB cell node and the HeNB cell node obtain a time-domain subframe set through OAM (Operation Administration and Maintenance, operation management and maintenance) or pre-defined negotiation.
[0087] Step 2. The MeNB cell node acquires a set of time-domain subframes.
[0088] Step 3: The MeNB cell node sends the acquired time-domain subframe set to the interfered user terminal (such as cell edge user terminal).
[0089] Step 4. The MeNB cell node sends an instruction message representing the way of determining the interference value to the interfered us...
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Abstract
The invention discloses a method for determining a channel quality indicator (CQI), a base station and a user terminal thereof. Therefore, accuracy of the determined CQI can be improved. The method comprises the following steps: the user terminal receives instruction message that is used to indicate an interference value determination mode and is sent by a first base station which contains the user terminal, wherein the instruction message is the message generated by the first base station according to coordination information and / or interference information; the user terminal uses the corresponding interference value determination mode to determine the interference value according to the instruction message; the user terminal determines the CQI according to the determined interference value. In the technical scheme of the invention, accuracy of determination of the CQI can be increased.
Description
technical field [0001] The invention relates to the field of mobile communication, in particular to a method for determining channel quality information, a base station and a user terminal. Background technique [0002] In mobile communication networks, the requirements for data rate and coverage are getting higher and higher, and the method of using macro base stations to provide access can no longer meet the requirements of data rate and coverage. Therefore, in order to improve data rate and coverage, the current It mainly adopts cell splitting, and deploys some low-power base stations (such as HeNB (Home enhanced Node Base Station, home base station), Pico NB (pico macro station), Relay NB (relay base station) etc.) in hot spots or indoors. Power base station is a kind of base station equipment applied in home indoor environment, office environment, or other small coverage environments, providing higher data rate and lower cost services. [0003] Although the introductio...
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