Data sending method, device and system in heterogeneous network

Patent metadata

Field	Value
Publication number	US-9468005-B2
Application number	US-201414328164-A
Country	US
Kind code	B2
Filing date	Jul 10, 2014
Priority date	Jan 11, 2012
Publication date	Oct 11, 2016
Grant date	Oct 11, 2016

Abstract

Disclosed are a data transmission method, apparatus and system in a heterogeneous network. The data transmission method in a heterogeneous network comprises: a macro base station carrying control information in a subframe, transmitting the control information to a terminal in a control-frequency band, and informing a low power node of the control information; according to the control information, the low power node carrying data information in a subframe and transmitting the data information to a terminal by a data-frequency band; the control-frequency band and the data-frequency band are statically deployed, and the control-frequency band and the data-frequency band are non-overlapped.

First claim

The invention claimed is:

1. A data sending method in a heterogeneous network, comprising:
carrying, by a macro base station (BS), control information in a subframe, sending the control information to a user equipment, UE, on a control-frequency band, wherein all Orthogonal Frequency Division Multiplexing (OFDM) symbols at the macro BS are configured to carry the control information; and
notifying, by the macro base station, a low power node (LPN) of the control information,
wherein the control-frequency band and a data-frequency band are configured statically,
wherein the data-frequency band is used by the LNP to send data information to the UE according to the control information, wherein all OFDM symbols at the LPN are configured to carry the data information, and
wherein the control-frequency band and the data-frequency band are on different bandwidth portions of the same carrier; or the control-frequency band and the data-frequency band are on different carriers.

2. The method according to claim 1 , wherein the carrying, by a macro BS, control information in a subframe, sending the control information to a UE on a control-frequency band comprises:
carrying, by the macro BS, access-control information in the subframe, and sending the access-control information to the UE on the control-frequency band;
configuring a serving LPN for the UE, by the macro BS, according to Reference Signal Received Power (RSRP) and Reference Signal Received Quality (RSRQ) measured by the UE on the data-frequency band, and notifying the UE on the control-frequency band through the downlink signaling, wherein the serving LPN is the LPN that provides service to the UE;
generating, by the macro BS, a scheduling result for the serving LPN or the UE according to channel state information, CSI, between the UE and the serving LPN that is reported by the UE; and
carrying in the subframe, by the macro BS, control-channel information generated according to the scheduling result, and sending the control-channel information to the UE on the control-frequency band.

3. The method according to claim 2 , wherein the generating, by the macro BS, a scheduling result for the serving LPN or the UE according to CSI between the UE and the serving LPN that is reported by the UE comprises one of:
sending, by the macro BS, the CSI to the serving LPN; and
receiving, by the macro BS, a scheduling result for the UE, wherein the scheduling result is generated by the serving LPN to schedule the UE according to the CSI; or
jointly scheduling, by the macro BS, time/frequency resources of the serving LPNs associated with the macro BS according to the CSI, to obtain the scheduling result for the serving LPNs; and
sending, by the macro BS, the scheduling result for the respective serving LPN to the corresponding serving LPN.

4. The method according to claim 2 , wherein
the LPN sends the data information to the UE on the data-frequency band according to the scheduling result for the serving LPN or the UE.

5. The method according to claim 3 , wherein
the LPN sends the data information to the UE on the data-frequency band according to the scheduling result for the serving LPN or the UE.

6. A data sending method in a heterogeneous network, comprising:
receiving, by a user equipment, UE, control information that is carried in a subframe and sent on a control-frequency band by a macro base station (BS) wherein all Orthogonal Frequency Division Multiplexing (OFDM) symbols at the macro BS are configured to carry the control information; and
receiving according to the control information, by the UE, data information that is carried in a subframe and sent on a data-frequency band by a low power node (LPN) according to the control information sent from the macro BS, wherein all OFDM symbols at the LPN are configured to carry the data information,
wherein the control-frequency band and the data-frequency band are configured statically
the control-frequency band and the data-frequency band are on different bandwidth portions of the same carrier; or the control-frequency band and the data-frequency band are on different carriers.

7. The method according to claim 6 , wherein the receiving, by a UE, control information that is carried in a subframe and sent on a control-frequency band by a macro BS comprises:
receiving, by the UE, access-control information that is carried in the subframe and sent on the control-frequency band by the macro BS;
sending, by the UE, to the macro BS, Reference Signal Received Power (RSRP) and Reference Signal Received Quality (RSRQ) measured on the data-frequency band, by which the macro BS configures a serving LPN for the UE, wherein the serving LPN is the LPN that provides service to the UE;
measuring, by the UE, channel state information (CSI) between the UE and the serving LPN on the data-frequency band;
sending, by the UE, the CSI to the macro BS on the control-frequency band, by which the macro BS generates a scheduling result for the serving LPN or the UE; and
receiving, by the UE, control-channel information that is generated from the scheduling result, carried in the subframe and sent on the control-frequency band by the macro BS.

8. A network device, comprising:
a macro base station, BS, configured to carry control information in a subframe, send the control information to a user equipment (UE) on a control-frequency band, and notify a low power node, LPN, of the control information;
wherein the control-frequency band and a data-frequency band are configured statically,
wherein the data-frequency band is used by the LNP to send data information to the UE, wherein all Orthogonal Frequency Division Multiplexing (OFDM) symbols at the LPN are configured to carry the data information, and
wherein the control-frequency band and the data-frequency band are on different bandwidth portions of the same carrier; or the control-frequency band and the data-frequency band are on different carriers.

9. The device according to claim 8 , wherein the macro BS comprises a processor configured to:
carry access-control information in the subframe, and send the access-control information to the UE on the control-frequency band;
configure a serving LPN for the UE according to Reference Signal Received Power (RSRP) and Reference Signal Received Quality (RSRQ) measured by the UE on the data-frequency band, and notify the UE on the control-frequency band through the downlink signaling, wherein the serving LPN is the LPN that provides service to the UE;
generate a scheduling result for the serving LPN or the UE according to channel state information (CSI) between the UE and the serving LPN that is reported by the UE; and
carry in the subframe control-channel information generated according to the scheduling result, and send the control-channel information to the UE on the control-frequency band.

10. The device according to claim 9 , wherein
the processor is further configured to send the CSI to the serving LPN; and receive a scheduling result for the UE, wherein the scheduling result is generated by the serving LPN scheduling the UE according to the CSI; or
the processor is further configured to jointly schedule time/frequency resources of the serving LPNs associated with the macro BS according to the CSI, to obtain the scheduling result for the serving LPNs; and send the scheduling result for the respective serving LPN to the corresponding serving LPN.

11. The device according to claim 9 , wherein
the LPN is configured to send the data to the UE on the data-frequency band according to the scheduling result for the serving LPN or the UE.

12. The device according to claim 10 , wherein
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Assignees

• Huawei Tech Co Ltd

Inventors

• Zhang Yongping
• Xia Yuan
• Chang Junren
• Feng Shulan

Classifications

• H04L5/001 Primary

  the frequencies being arranged in component carriers · CPC title

• H04W16/12

  Fixed resource partitioning · CPC title

• H04W72/542

  using measured or perceived quality · CPC title

• H04L5/0053

  Allocation of signalling, i.e. of overhead other than pilot signals · CPC title

• H04W16/10

  Dynamic resource partitioning · CPC title