Method and device for implementing bandwidth-asymmetrical system

An asymmetric and bandwidth technology, applied in transmission systems, digital transmission systems, connection management, etc., can solve the problems of waste of wireless spectrum resources, waste of uplink spectrum resources, waste of wireless resource use costs, etc., to reduce processing capacity and save hardware. Cost, flexible use of effects

Active Publication Date: 2011-04-20
ZTE CORP
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In today's increasingly tense wireless spectrum resources, the waste of wireless spectrum resources is the waste of operators' wireless resource usage costs, and there is no solution to this waste of uplink spectrum resources under the current LTE FDD protocol framework.

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  • Method and device for implementing bandwidth-asymmetrical system

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Embodiment 2

[0038] Introduce in detail with embodiment two again:

[0039] It is assumed that the LTE FDD system has a system bandwidth of 20 MHz, and 100 RBs (Resource Blocks) are denoted as: RB0, RB1, RB2, . . . , RB99. Limit the uplink to only use 70 RBs between RB21, RB22,..., RB90; give the specific implementation process;

[0040] Step 1, the eNodeB restricts the available spectrum resources of the uplink system to RBs between RB21-RB90;

[0041] Step 2: The eNodeB configures PRACH spectrum resources between RB21-RB90. In this embodiment, the PRACH spectrum resources are configured as RB41, RB42, ..., RB46;

[0042] Step 3, the UE initiates random access within the PRACH spectrum specified by the eNodeB;

[0043] Step 4, the random access is completed, the RRC link is successfully established, the periodic CQI feedback service of the UE is scheduled semi-persistently, the SRS transmission bandwidth is configured in the range of RB21-RB90, and the PUSCH frequency hopping mode is de...

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Abstract

The invention discloses a method for implementing a bandwidth-asymmetrical system, which specifically comprises the following steps that: in an uplink limited spectral range, an evolved node B schedules a physical uplink shared channel and configures a physical random access channel; user equipment initiates random access according to the configuration of the physical random access channel and establishes radio resource control (RRC) connection with the evolved node B; the evolved node B semi-persistently schedules the user equipment; and the user equipment carries uplink control information by the physical uplink shared channel in a semi-persistently scheduled state. The invention also relates to a device for implementing the bandwidth-asymmetrical system. In the method and the device, all the uplink control information except a schedule request (SR) is carried by the physical uplink shared channel, so that a physical uplink control channel (PUCCH) processing module is not required in the processing of an uplink physical layer in the system, an uplink system bandwidth is ensured to be less than or equal to a downlink system bandwidth, and the design of the system with the asymmetrical uplink and downlink bandwidths is finished in a conventional frequency division duplex (FDD) protocol frame.

Description

technical field [0001] The present invention relates to the field of LTE (long term evolution, long-term evolution) mobile communication systems, in particular to a method and device for realizing an uplink and downlink asymmetric bandwidth system. Background technique [0002] With the development of wireless broadband communication technology, wireless spectrum resources, as a non-renewable resource, have become more and more precious. [0003] In LTE and future 4G (Fourth Generation) wireless communication systems, the most widely used Frequency Division Duplex (FDD, Frequency Division Duplex) mode is a system based on uplink and downlink symmetric bandwidths. However, people generally download more than upload in network applications, that is, the demand for spectrum resources for downlink is greater than that for uplink. Therefore, when the downlink resources are fully utilized, the uplink resources will be wasted. However, under the current LTE FDD protocol framework...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W72/12H04W74/08H04W76/02H04L1/16
CPCH04W72/1263H04W74/0833H04L1/1671H04L5/0012H04L5/0044H04L5/0053H04L5/0055H04L5/0057H04L5/0078
Inventor 张庆宏谭欢喜录显明
Owner ZTE CORP
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