US 8,798,014 B2Granted

Data transmission method and device in carrier aggregation system

AssigneeChina Academy of Telecommunications Technology

InventorsXueming Pan, Zukang Shen, Yanan Lin

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Abstract

Disclosed are a data transmission method and device in a carrier aggregation system, used for realizing the data transmission of UE which does not support uplink and downlink transmission simultaneously in a carrier aggregation system which uses different TDD uplink and downlink configurations. The data transmission method in a carrier aggregation system provided in the present application includes: an eNB performing data transmission with specific user equipment (UE) according to the time division duplex (TDD) uplink and downlink sub-frame configuration employed by a specific component carrier in a carrier aggregation system by means of a component carrier in the carrier aggregation system, wherein said specific UE is TDDUE which does not support simultaneously performing uplink data transmission and downlink data transmission in an identical sub-frame.

Claims20

Dependent claims

A data communication method in a carrier aggregation system comprising:

an eNB communicating data with a specific User Equipment, UE, over component carriers in the carrier aggregation system using a Time Division Duplex, TDD, uplink and downlink sub-frame configuration adopted for a specific component carrier in the carrier aggregation system,
wherein the eNB determined that the specific UE is a TDD UE incapable of supporting simultaneous uplink data transmission and downlink data transmission over different component carriers in a same sub-frame;
and wherein for the specific component carrier, the eNB communicates data with the specific UE over the specific component carrier in the carrier aggregation system, based on the determination, using the TDD uplink and downlink sub-frame configuration adopted for the specific component carrier;
and
for a non-specific component carrier, the eNB communicates data with the specific UE over the non-specific component carrier in the carrier aggregation system, based on the determination, using the TDD uplink and downlink sub-frame configuration adopted for the specific component carrier as follows:
the eNB judging whether the non-specific component carrier has a same transmission direction as the specific component carrier in the same sub-frame, and if so, then determining the sub-frame as an available sub-frame of the non-specific component carrier;
otherwise, determining the sub-frame as an unavailable sub-frame of the non-specific component carrier;
the eNB scheduling for the UE an uplink transmission resource corresponding to an uplink available sub-frame and receiving data transmitted from the UE over the scheduled uplink transmission resource;
and
the eNB transmitting downlink data to the UE in a downlink available sub-frame.

7 more elements

A data communication method in a carrier aggregation system comprising:

a User Equipment, UE, communicating data with an eNB over component carriers in the carrier aggregation system using a Time Division Duplex, TDD, uplink and downlink sub-frame configuration adopted for a specific component carrier in the carrier aggregation system,
wherein the eNB determines that the specific UE is a TDD UE incapable of supporting simultaneous uplink data transmission and downlink data transmission over different component carriers in a same sub-frame;
and wherein for the specific component carrier, the UE communicates data with the eNB over the specific component carrier in the carrier aggregation system, based on the eNB's determination, using the TDD uplink and downlink sub-frame configuration adopted for the specific component carrier;
and
for a non-specific component carrier, the UE communicates data with the eNB over the non-specific component carrier in the carrier aggregation system, based on the eNB's determination, using the TDD uplink and downlink sub-frame configuration adopted for the specific component carrier in the carrier aggregation system as follows:
the UE obtaining an uplink transmission resource corresponding to an uplink available sub-frame scheduled by the eNB and transmitting data to the eNB over the uplink transmission resource;
and
the UE receiving data transmitted from the eNB in a downlink available sub-frame;
wherein the available sub-frames refer to sub-frames in which the non-specific component carrier has a same transmission direction as the specific component carrier.

6 more elements

A data communication apparatus in a carrier aggregation system comprising:

a sub-frame configuration determining component configured to determine a TDD uplink and downlink sub-frame configuration adopted for a specific component carrier in the carrier aggregation system;
and
a data communication processing component configured to communicate data with an eNB over component carriers in the carrier aggregation system using the TDD uplink and downlink sub-frame configuration adopted for the specific component carrier in the carrier aggregation system;
wherein the eNB determines that the specific UE is a UE incapable of supporting simultaneous uplink data transmission and downlink data transmission over different component carriers in a same sub-frame;
and
wherein:
for the specific component carrier, the data communication processing component communicates data with the eNB over the specific component carrier in the carrier aggregation system, based on the eNB's determination, using the TDD uplink and downlink sub-frame configuration adopted for the specific component carrier;
and
for a non-specific component carrier, the data communication processing component obtains, based on the eNB's determination, an uplink transmission resource corresponding to an uplink available sub-frame scheduled by the eNB and transmits data to the eNB over the uplink transmission resource;
and receives data transmitted from the eNB in a downlink available sub-frame;
wherein the available sub-frames refer to sub-frames in which the non-specific component carrier has a same transmission direction as the specific component carrier.

8 more elements

Dependencies are inferred from the claim text.

Facts

Application: 14/131,906Filed 2 Jul 2012
Priority: CN 2011 1 019333311 Jul 2011
Published: US 2014/0140251 A122 May 2014
Granted: 5 Aug 2014
Term ends: Not estimatedThe source records don’t support an estimate.

Classification9 codes

H04W 72/51
Allocation or scheduling criteria for wireless resources: based on terminal or device properties
H04L 5/001
The frequencies being orthogonal, e.g. OFDM or DMT: the frequencies being arranged in component carriers
H04W 72/0446
Based on the type of the allocated resource: resources in time domain, e.g. slots or frames
H04L 5/0055
Allocation of signalling, i.e. of overhead other than pilot signals: physical resource allocation for ACK/NACK