Physical resource allocation for UL control channels in adaptive TDD systems

A control channel, self-adaptive technology, applied in the directions of transmission path sub-channel allocation, signaling allocation, pilot signal allocation, etc., can solve problems such as resource collision

Inactive Publication Date: 2016-11-23
HFI INNOVATION INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to solve the problem of PUCCH resource collision between existing UE and eIMTA UE, five solutions are proposed, in which the existing UE follows the system configuration, and the eIMTA UE follows the DL reference configuration different from the system configuration

Method used

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  • Physical resource allocation for UL control channels in adaptive TDD systems
  • Physical resource allocation for UL control channels in adaptive TDD systems
  • Physical resource allocation for UL control channels in adaptive TDD systems

Examples

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Embodiment

[0063]Example #1: When the eIMTA UE complies with a DL reference configuration different from the system configuration, and uses PUCCH format 1 / 1a / 1b and PUCCH format 1b with CS to feed back DL HARQ-ACK, the eIMTA UE can modify the DL reference configuration according to The set of DL associations determines the PUCCH resource. Reordering the index of DL associations and adding VIs can be used to modify the set index of DL associations of the DL reference configuration, and the corresponding modification is based on the system configuration.

[0064] In Tables 4 to 9 below, "→" indicates modification from K to K', and VI indicates a virtual index for renumbering DL-associated indices.

[0065] Table 4 is an example of a set of modified DL associations. Assuming that the system configuration is 0, the possible DL reference configurations are 1-6. The set K′ corresponding to the corrected DL association is shown in Table 4. In the table below, some sets of DL associations do ...

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Abstract

The embodiments of this invention propose methods of physical resource allocation for UL control channels including PUCCH and PRACH in adaptive TDD systems. In an adaptive TDD system, there are multiple types of UL-DL configuration, e.g. System configuration, UL- reference configuration (same to System configuration), DL-reference configuration (different from System configuration) and actual configuration. If legacy UE and e IMTA UE respectively follow System configuration and DL-reference configuration to feedback DL HARQ-ACK and corresponding PUCCH resources are implicitly determined by CCE index, PUCCH resource collision may happen, i.e. multiple PUCCHs are transmitted in single resource. The problem of PUCCH resource collision will cause PUCCH performance degeneration and needs to be resolved. Some solutions are proposed in the invention to resolve this problem.

Description

technical field [0001] The disclosed embodiments relate generally to adaptive time division duplex (TDD) networks, and more specifically to physical resource allocation for UL control channels in adaptive TDD systems. Background technique [0002] In 3GPP systems, such as LTE-Advanced (LTE-A), spectral efficiency is improved by using a diverse set of deployed base stations in a heterogeneous network topology. Using a mix of macro, pico, femto, and relay base stations, heterogeneous networks enable flexible and low-cost deployment, and provide a consistent broadband user experience. [0003] In recent 3GPP work, the drive of system design shows the need for more flexible configuration of network systems. Based on system load, traffic type, traffic pattern and so on, the system can dynamically adjust its own parameters to further utilize wireless resources and save energy. One example is the support of adaptive TDD configuration, where the TDD configuration in the system can...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/16
CPCH04L1/1812H04L1/1861H04L5/0048H04L5/0055H04L5/0073H04L5/1469H04W74/004H04W74/006
Inventor 黄建华吴敏林香君庄向阳
Owner HFI INNOVATION INC
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