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Data transmission method and system in heterogeneous network

A data transmission method and heterogeneous network technology, which is applied in the field of data transmission methods and systems, and can solve problems such as non-monitoring

Active Publication Date: 2014-05-14
BEIJING SAMSUNG TELECOM R&D CENT +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] 1) Do not monitor PDCCH on this SCell;
[0012] 2) Do not monitor the PDCCH for the SCell;
[0021] In the above prior art, carrier aggregation is performed between cells under the same eNB, and cross-eNB carrier aggregation is not involved

Method used

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  • Data transmission method and system in heterogeneous network
  • Data transmission method and system in heterogeneous network
  • Data transmission method and system in heterogeneous network

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0092] This embodiment describes the process of exchanging cell configuration information between eNBs. The configuration parameters related to configuring the SCell can be divided into two categories, one is semi-static configuration parameters, and the other is dynamic configuration parameters. Semi-static configuration parameters can be exchanged between eNBs during the establishment of the X2 interface. The eNB notifies the adjacent eNB of the semi-static configuration parameters related to the SCell configuration through the X2 interface establishment process. After that, the adjacent base station saves the received semi-static configuration parameters and configures the secondary cell for the UE. , using this semi-static configuration parameter. When the PCell configures the SCell for the UE, if the SCell and the PCell are on different base stations, the PCell requests the SCell for the dynamic configuration parameters of the SCell, for example: physical layer-specific ...

Embodiment 2

[0108] This embodiment describes the process in which the network establishes a PCell and an SCell for a UE. see Figure 6 , the process takes establishing an SCell as an example, and may include the following steps:

[0109] Step 601: The UE establishes an RRC connection with the base station. In carrier aggregation, the cell with which the UE establishes an RRC connection is the UE's PCell.

[0110] Here, the process of establishing the RRC connection is the same as the currently defined process. The process is briefly described below: UE sends an RRC connection request message to PCell, the message contains information such as the reason why UE wants to establish RRC and the identity of UE; PCell sends an RRC establishment message to UE, and the message contains configuration information of signaling bearer; UE sends RRC Create a response message to the PCell, the message contains the NAS message and the PLMN identifier selected by the UE.

[0111] Step 602: PCell sends...

Embodiment 3

[0135] This embodiment describes the process of releasing an SCell, such as Figure 7 As shown, the process may include the following steps:

[0136] Step 701: the base station where the SCell is located sends an SCell status report message to the base station where the PCell is located.

[0137] Data is transmitted between the SCell and the UE, and signaling of the physical layer and the MAC layer is transmitted. The SCell can obtain the quality status of the SCell through the received physical layer report information, such as the CQI report information. The quality situation is reported by the SCell to the PCell, and the PCell can monitor the quality situation of the SCell. The reporting of the quality status can be periodic or event-triggered, and the reporting mechanism can be configured by the PCell or OAM. Taking event triggering as an example, if the quality of the SCell does not meet predetermined requirements within a period of time, the SCell may send an SCell sta...

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PUM

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Abstract

The invention discloses a data transmission method in a heterogeneous network. The method comprises: a PCell of UE realizing a PDCP layer, an RLC layer, a MAC layer and a physical layer, and an SCell of the UE realizing an RLC layer, a MAC layer and a physical layer, wherein an MME sends an S1 control signaling to the PCell, and the PCell sends an RRC signaling to the UE; and an SGW sending the data of the UE to the PCell, the PCell dividing the data of the UE in the PDCP layer, then sending each path of the data to the UE via the PCell and / or the SCell of the UE, and the UE recombining the data in the PDCP layer and then sending to an application layer. The invention also discloses a data transmission system in a heterogeneous network. By adopting the technical scheme disclosed by the invention, the cooperation among heterogeneous networks can be realized, the resources of the heterogeneous networks can be fully utilized, and the overall heterogeneous networks are more energy-saving.

Description

technical field [0001] The present application relates to the technical field of wireless communication, and in particular to a data transmission method and system under a heterogeneous network. Background technique [0002] Modern mobile communication tends to provide users with high-speed multimedia services, such as figure 1 Shown is the system architecture diagram of System Architecture Evolution (SAE). in: [0003] User Equipment (UE) 101 is a terminal device for receiving data. Evolved Universal Terrestrial Radio Access Network (E-UTRAN) 102 is a radio access network including macro base stations (eNodeBs / NodeBs) providing UEs with an interface to access the radio network. Mobility Management Entity (MME) 103 is responsible for managing UE's mobility context, session context and security information. Serving Gateway (SGW) 104 mainly provides user plane functions, and MME 103 and SGW 104 may be in the same physical entity. The packet data network gateway (PGW) 105 ...

Claims

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Application Information

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IPC IPC(8): H04W52/02H04W72/04H04W76/04
CPCY02D30/70
Inventor 王弘许丽香梁华瑞
Owner BEIJING SAMSUNG TELECOM R&D CENT
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