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Preamble transmission and receiving methods and devices, user equipment and base station

A sending method and a technology of a preamble, applied to devices, random access processing methods, preamble sending, user equipment and base stations, and receiving fields

Active Publication Date: 2017-07-28
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] The present invention provides a method, device, user equipment and base station for sending and receiving a preamble, so as to at least solve the problem in the related art that the random access process cannot be implemented on an unlicensed carrier

Method used

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  • Preamble transmission and receiving methods and devices, user equipment and base station
  • Preamble transmission and receiving methods and devices, user equipment and base station
  • Preamble transmission and receiving methods and devices, user equipment and base station

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0171] In this preferred embodiment, a non-contention random access method is given. This example is applicable to situations such as handover process, downlink data arrival, and UE positioning, and is also applicable to (e)CA, or DC scenarios. The specific steps are as follows:

[0172] Step 1: The evolved base station eNB allocates a dedicated identifier, namely C-RNTI, to the UE.

[0173] Step 2: The eNB notifies the UE to perform random access to complete uplink synchronization.

[0174] The eNB notifies subordinate UEs to perform random access and complete uplink synchronization, and the notification signaling may be physical layer signaling or high-level signaling.

[0175] The physical layer signaling may be a DCI. The CRC in the DCI is scrambled or masked using the C-RNTI of the UE;

[0176] If the DCI is delivered through the authorized carrier, the eNB directly notifies the UE to perform random access through the DCI in the PDCCH;

[0177] However, if the DCI is ...

Embodiment 2

[0220] In this preferred embodiment, a method for sending a preamble code on an unlicensed carrier is provided, that is, notified by the eNB, or signaled, or pre-agreed time domain and / or frequency domain resources or timing A method for sending preamble codes on domain and / or frequency domain resource sets. Wherein, the time domain resource for sending the Preamble code (that is, the first predetermined time-frequency domain resource) may be K subframes, or the length of S OFDM symbols. Wherein, preferably, K is preferably 1, 2, 3, and S is 2. In the frequency domain, there may be six consecutive physical resource blocks (Physical Resource Blocks, PRBs for short), or resources that occupy the entire bandwidth or 80% of the entire bandwidth.

[0221] The method of sending the preamble code on the unlicensed carrier is one of the following:

[0222] Method 1: Send the preamble code through the short control signaling SCS. Wherein: the time domain and / or frequency domain reso...

Embodiment 3

[0229] In this preferred embodiment, a method for improving or increasing the success probability of preamble code transmission is provided.

[0230] For the characteristics of unlicensed carriers (regulatory requirements in some regions stipulate that before transmitting on unlicensed carriers, the LBT mechanism and / or CCA detection must be performed to obtain the right to use unlicensed carriers), in order to increase or To improve the success rate of preamble code transmission, one of the following methods can be adopted:

[0231] Mode 1: Shorten the interval between PRACH time-domain resources for sending Preamble codes (here, the time-frequency domain resources of PRACH are the time-frequency domain resources for sending Preamble codes), or, period, or, PRACH time domain and / or frequency domain resource density.

[0232] Assuming that there is only one PRACH resource configured to send the Preamble code on the licensed carrier or the unlicensed carrier in each radio fram...

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Abstract

The invention provides preamble transmission and receiving methods and devices, user equipment and a base station. The preamble transmission method comprises the following steps: determining time-frequency domain resources for transmitting preambles on an unlicensed carrier; and transmitting the preambles on the determined time-frequency domain resources. Through adoption of the preamble transmission and receiving methods and devices, the user equipment and the base station, the problem that a random access process cannot be implemented on the unlicensed carrier in the prior art is solved, and the effect of successfully performing random access on the unlicensed carrier is achieved.

Description

technical field [0001] The present invention relates to the communication field, in particular, to a preamble sending, receiving, and random access processing method, device, user equipment, and base station. Background technique [0002] With the rapid growth of data services, the data transmission pressure on licensed spectrum carriers is also increasing. Therefore, using unlicensed spectrum carriers to share the data traffic in licensed carriers has become a long-term evolution (Long Term Evolution, referred to as An important evolution direction of LTE) development. [0003] The characteristics of unlicensed spectrum are: unlicensed spectrum does not need to be purchased, spectrum resources are zero-cost, and have the characteristics of free / low cost; individuals and enterprises can participate in deployment, equipment manufacturers can deploy equipment at will, and have low access requirements. The feature of low cost; the 5GHz, 2.4GHz and other frequency bands in the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W74/08H04L5/00
CPCH04L5/0005H04L5/0051H04W74/0808H04W74/0833H04W74/0841H04L5/00H04W74/08H04W74/085
Inventor 杨玲苟伟赵亚军毕峰
Owner ZTE CORP
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