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Systems and methods for scheduling multiple-input multiple-output (mimo) high speed downlink packet access (hsdpa) pilot channels

A pilot channel and downlink technology, which is applied in the field of scheduling multiple-input multiple-output high-speed downlink packet access pilot channels, and can solve problems such as low transmit power of common pilot channels and inability to estimate high-order MIMO channels.

Active Publication Date: 2018-04-10
NOKIA TECH OY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in some instances, the low transmit power of multiple common pilot channels will not provide sufficiently correct high-order MIMO channel estimation for next-generation UEs

Method used

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  • Systems and methods for scheduling multiple-input multiple-output (mimo) high speed downlink packet access (hsdpa) pilot channels
  • Systems and methods for scheduling multiple-input multiple-output (mimo) high speed downlink packet access (hsdpa) pilot channels
  • Systems and methods for scheduling multiple-input multiple-output (mimo) high speed downlink packet access (hsdpa) pilot channels

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Embodiment Construction

[0022] The making and using of the presently described embodiments are discussed in detail below. It should be appreciated, however, that the present invention provides many applicable inventive concepts that can be embodied in a wide variety of specific contexts. The specific embodiments discussed are merely illustrative of specific ways to make and use the invention, and do not limit the scope of the invention.

[0023] An alternative to increasing the transmit power of the common pilot is to simultaneously transmit one or more additional pilot channels with the common pilot while continuing to maintain the common pilot at a low transmit power. These additional pilot channels are generally referred to as scheduled common pilot channels (or demodulation pilots), and are referred to herein as scheduled pilots (short for). Accordingly, the terms 'scheduled common pilot channel', 'demodulation pilot' and 'scheduled pilot' may be used synonymously herein. These one or more sche...

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Abstract

The transition from basic high-order MIMO estimation to enhanced high-order MIMO estimation can be accomplished by signaling High Speed ​​Downlink Packet Access (HSDPA) Shared Control Channel (HS-SCCH) orders to next-generation user equipment (UE) (vice versa). The base station is operable to send an HS-SCCH order indicating the activation of a scheduled pilot channel and then start sending the scheduled pilot channel after receiving an ACK message from at least one next generation UE. The base station can also be used to send an HS-SCCH order to next-generation UEs scheduled for downlink transmission, the HS-SCCH order indicating the deactivation of the scheduled pilot channel, and then after receiving a request from each next-generation The UE stops sending the scheduled pilot channel after the ACK message. Alternatively, the scheduled pilot channel may be activated / deactivated after a timeout period even if no ACK message has been received from some or all of the next generation UEs scheduled for downlink transmission.

Description

[0001] This invention claims the patent of U.S. Provisional Application No. 61 / 648961, filed May 18, 2012, entitled "Systems and Methods for Scheduling MIMO HSDPA Pilot Channels" Prior to priority, the content of this application is incorporated by reference into this text as if reproduced in its entirety. technical field [0002] The present invention relates to systems and methods for wireless communications and, in particular embodiments, to systems and methods for scheduling Multiple Input Multiple Output (MIMO) High Speed ​​Downlink Packet Access (HSDPA) pilot channels. Background technique [0003] In High Speed ​​Downlink Packet Access (HSDPA) Release 11 (rel-11), a four-branch multiple-input multiple-output (MIMO) transmission scheme was introduced at the Node B (NB) to support multiple data streams over multiple antennas transmission. Specifically, the four-branch MIMO transmission scheme multiplexes multiple transport blocks into two data streams, which are sent o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L1/06
CPCH04L1/0027H04L1/06H04W72/12H04W48/08H04W74/006H04L5/005H04L25/0226H04B7/0623H04L25/0204H04W72/04H04B7/0413H04L5/0048H04L5/0055H04W72/1273
Inventor 卡梅拉·卡佐王宗杰
Owner NOKIA TECH OY