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Mitigating cross-link interference when using reconfigurable TDD

A technology of cross-link and link control information, which is applied in the field of cross-link interference, and can solve problems such as cross-link interference and unknown cross-link impact

Inactive Publication Date: 2015-09-09
TELEFON AB LM ERICSSON (PUBL)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0013] Also, the effect of cross-link interference on HARQ acknowledgments is not known
One problem with reconfigurable TDD systems is that when using HARQ timing or mapping as described above, a HARQ acknowledgment in one cell will fall into a UL subframe that is experiencing an incoming signal from a neighboring cell. Significant cross-link interference of base stations transmitting simultaneously in DL

Method used

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  • Mitigating cross-link interference when using reconfigurable TDD
  • Mitigating cross-link interference when using reconfigurable TDD
  • Mitigating cross-link interference when using reconfigurable TDD

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Embodiment Construction

[0030] In the following, different aspects will be described in more detail with reference to certain embodiments and figures. For purposes of explanation and not limitation, specific details such as specific scenarios and techniques are set forth in order to provide a thorough understanding of the various embodiments. However, other embodiments may exist that depart from these specific details.

[0031] In a non-limiting general context, regarding an example scenario with aggressor and victim base stations (eg figure 1 shown in ), describing examples. In an example scenario, a supplemental TDD configuration is used for HARQ transmission. However, it should be noted that these embodiments can be applied to any radio access network technology that applies reconfigurable TDD in different cells or that applies different TDD configurations, and is used to Any type of UL control information mapped in the same way as HARQ transmissions.

[0032] Embodiments of the present invent...

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Abstract

Methods and apparatus are provided for mitigating cross-link interference. The method is implemented by a base station of a wireless communication system, the base station serving user terminals in a first cell. The method comprises selecting (610) a primary time division duplex, TDD, configuration designating uplink and downlink subframes for communication with the user terminals in the first cell,and determining (620) uplink subframes of the primary TDD configuration that are overlapping in time with downlink subframes of a TDD configuration used in a second cell. The method also comprises transmitting (630), to a user terminal in the first cell, a request to use a supplemental TDD configuration for transmitting uplink control information, wherein uplink subframes of the supplemental TDD configuration are not overlapping in time with downlink subframes of the TDD configuration used in the second cell.

Description

technical field [0001] The present disclosure relates to cross-link interference, and more particularly to methods and base stations and user terminals for mitigating cross-link interference when using a reconfigurable time division duplex configuration. Background technique [0002] 3GPP Long Term Evolution (LTE) is a fourth-generation mobile communication technology standard developed within the Third Generation Partnership Project (3GPP) to improve the Universal Mobile Telecommunications System (UMTS) standard to address issues such as higher data rates, improved efficiency Future requirements for improved services such as reduced fees. Universal Terrestrial Radio Access Network (UTRAN) is the radio access network of UMTS, and Evolved UTRAN (E-UTRAN) is the radio access network of LTE system. In UTRAN and E-UTRAN, User Equipment (UE) is wirelessly connected to a radio base station, which is generally called a NodeB in UMTS and an evolved NodeB (eNodeB) in LTE. A radio b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W72/08H04W72/04H04W72/54
CPCH04W72/082H04W72/0446H04W72/541H04L1/1887H04L5/14H04L1/1812
Inventor I·拉曼E·埃里克森E·塞曼
Owner TELEFON AB LM ERICSSON (PUBL)
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