Method for enhanced inter-cell interference cancellation (eICIC) in heterogeneous network, base station and user equipment

An enhanced technology for co-channel interference, applied in wireless communication, electrical components, connection management, etc., can solve the problem of incomplete and specific methods for enhanced co-channel interference cancellation or coordination, increased interference coordination complexity, and irregular cell shapes Rules and other issues

Inactive Publication Date: 2012-04-04
SHARP KK
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  • Claims
  • Application Information

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Problems solved by technology

However, the heterogeneous network also has the following problems: (1) For the new transmitting node introduced, it is necessary to design the related common channel, control channel, protocol structure and physical process at the data link layer and network layer, to a certain extent This increases the complexity of the system design; (2) Since the introduction of a new transmitting node within the original cell range is equivalent to the introduction of a new interference source, it will bring greater interference to the interference coordination between cells at the physical layer. challenge
In this interference scenario, for the base station of a macro cell, it is equivalent to adding many "cell edges" inside the cell, which increases the complexity of interference coordination in the entire cell; for a closed subscriber group (CSG) base station, due to Its deployment is very random, the shape of the cell is irregular, the coverage of two different home base stations (HeNB) may overlap to a large extent, and coordinating interference between different home base stations is also a new problem
(2) Interference scenarios caused by different transmission powers of base stations in different types of cells
[0040] To sum up, in view of the fact that the existing methods in the world for enhanced co-channel interference cancellation or coordination in heterogeneous networks are not comprehensive and specific, they cannot fully meet the co-channel interference of LTE-A on the control channel between Macro-Femto cells. Elimination or coordination needs, backward compatibility and other issues, it is necessary to find a comprehensive, efficient and simple and practical method of eICIC in heterogeneous networks, base stations and user equipment

Method used

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  • Method for enhanced inter-cell interference cancellation (eICIC) in heterogeneous network, base station and user equipment
  • Method for enhanced inter-cell interference cancellation (eICIC) in heterogeneous network, base station and user equipment
  • Method for enhanced inter-cell interference cancellation (eICIC) in heterogeneous network, base station and user equipment

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no. 1 example

[0089] The first embodiment of the present invention is a method of eICIC in a Macro-Femto heterogeneous network. Figure 7 A schematic diagram showing an application scenario of the eICIC method according to the first embodiment of the present invention. Such as Figure 7 As shown, the entire heterogeneous network includes a macrocell base station MeNB 510, a femtocell base station HeNB 530, a macrocell user equipment MUE 511, a home user equipment HUE 531, and a HUE 532, wherein the MeNB 510 is the serving base station of the MUE 511, and the HeNB 530 is the The serving base stations of HUE 531 and HUE 532, MeNB 510 and HeNB 530 can perform background (Backhaul) communication.

[0090] Background communication involves the structure of the LTE access network. The structure of the LTE access network is now described. The LTE access network is only composed of eNBs, which provide the packet switching core network (MME / S-GW, that is, the gateway of the mobility management en...

no. 2 example

[0110] The second embodiment of the present invention is another eICIC method in a Macro-Femto heterogeneous network. In essence, this method is an application of the co-channel interference cancellation scheme based on power control or power setting in the first embodiment. Figure 15 A flowchart according to a second embodiment of the present invention is shown.

[0111] As can be seen in the figure, Figure 15 Steps S100 to S101 in the Figure 9 The corresponding steps in are exactly the same, so the description will start from step S102' here, and the detailed description of these two steps will not be repeated.

[0112] In step S102', the HeNB judges whether the distribution of the HUE 531 and the HUE 532 in the cell is both distributed in the center of the cell. If the distribution of HUE 531 and HUE 532 in the cell of HeNB 530 is such that both HUE 531 and HUE 532 are in the center of the cell, execute step S103'; if both HUE 531 and HUE 532 are not in the center of ...

no. 3 example

[0136] The third embodiment of the present invention is a method for eICIC in a Macro-Femto heterogeneous network. Figure 17 A schematic diagram showing an application scenario of the eICIC method according to the third embodiment of the present invention. Such as Figure 17 As shown, the entire heterogeneous network includes a macrocell base station MeNB 610, a femtocell base station HeNB 630, macrocell user equipment MUE 611, MUE 612, and a home network user equipment HUE 631, wherein MeNB 610 is the serving base station of MUE 611 and MUE 612 , the HeNB 630 is the serving base station of the HUE 631, and the MeNB 610 communicates with the HeNB 630 through a backhaul (Backhaul) interface.

[0137] Figure 18 A flow chart of a method for eICIC in a heterogeneous network according to the third embodiment of the present invention is shown. Such as Figure 17 As shown, the method starts at step S200. In this step, when the MUE 611 is in idle mode and enters the CSG cell of...

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Abstract

The invention discloses a method for enhanced inter-cell interference cancellation (eICIC) in a heterogeneous network, and a corresponding base station and corresponding user equipment. A macro eNodeB (MeNB) defines a signaling to inform a home eNodeB (HeNB) of an event that MeNB cell user equipment (MUE) in a connection mode enters the edge or the neighborhood of an HeNB cell; when HeNB cell user equipment (HUE) is all located at the center of the HeNB cell, the HeNB adopts downlink power control or power settings to reduce the inter-cell interference (ICI) subjected to the MUE on a control channel; the MeNB also can adopt a mechanism of being really or falsely handed over an HeNB cell aiming at that the MUE is either CSG UE (Close Subscriber Group User Equipment) or Non-CSG UE, wherein when the MeNB is falsely handed over to the HeNB cell, a mechanism that the HeNB configures the DRX (Discontinuous Reception) of the HUE can be adopted; and when the MUE in an idle mode enters the edge or the neighborhood of the HeNB cell, if the MUE dwells at the HeNB cell, the HeNB adopts different mechanisms to reduce the ICI subjected to the MUE on the basis that that the MUE is in the connection mode or the idle mode. The method has the characteristics of simplicity, flexibility, high efficiency, and easiness to implement.

Description

technical field [0001] The invention relates to the field of wireless communication, in particular to a method for eliminating enhanced co-channel interference in a heterogeneous network, a base station and user equipment. Background technique [0002] Since personal or mobile communication devices have been required to have broadband services such as multimedia services, online games, video on demand, mobile TV, and mobile Internet, wider system frequency bands, higher peak rates, and better edge service quality have become the future An important requirement for personal or mobile communication systems. In order to evolve to meet this demand, 3GPP (Third Generation Partnership Project), as an international organization dedicated to the standardization of personal or mobile communications, began to discuss the first The standardization work of the fourth generation (4G) cellular communication system defines the LTE-Advanced (LTE-A) version for the evolution from the curren...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W36/08H04W68/00H04W76/02
Inventor 梁永明刘仁茂丁铭杨曾
Owner SHARP KK
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