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US 10,098,058 B2Granted
Method and apparatus of transmitting discovery signal, method and apparatus of discovering cell
AssigneeChina Academy of Telecommunications Technology
InventorsWeijie Xu, Xueming Pan, Zukang Shen
Life of this patent
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Abstract
The method of transmitting a discovery signal according to an embodiment of the present disclosure includes: determining whether a channel in an unlicensed frequency band is idle; transmitting the discovery signal in the channel in the unlicensed frequency band during a current cycle of a discovery signal transmission period if the channel in the unlicensed frequency band is determined to be idle; and not transmitting the discovery signal in the channel in the unlicensed frequency band during the current cycle if the channel in the unlicensed frequency band is determined to be not idle.
Claims17
A method of transmitting a discovery signal, comprising:
- determining whether a channel in an unlicensed frequency band is idle;
- transmitting the discovery signal in the channel in the unlicensed frequency band during a current cycle of a discovery signal transmission period if the channel in the unlicensed frequency band is determined to be idle;
- and
- not transmitting the discovery signal in the channel in the unlicensed frequency band during the current cycle if the channel in the unlicensed frequency band is determined to be not idle;
- wherein the determining whether the channel in the unlicensed frequency band is idle comprises:
- determining whether the channel in the unlicensed frequency band is idle, based on a received power of the channel in the unlicensed frequency band;
- wherein the determining whether the channel in the unlicensed frequency band is idle based on the received power of the channel in the unlicensed frequency band comprises:
- determining whether the channel in the unlicensed frequency band is idle, by comparing a total received power of the channel in the unlicensed frequency band with a first threshold, wherein if the total received power is above the first threshold, the channel in the unlicensed frequency band is not idle, and if not, the channel in the unlicensed frequency band is idle;
- or
- determining whether the channel in the unlicensed frequency band is idle, by comparing a received power of a non-LTE signal in the channel in the unlicensed frequency band with a second threshold, wherein if the received power of the non-LTE signal is above the second threshold, the channel in the unlicensed frequency band is not idle, and if not, the channel in the unlicensed frequency band is idle;
- or determining whether the channel in the unlicensed frequency band is idle, by comparing a received power of an LTE signal in the channel in the unlicensed frequency band with a third threshold, wherein if the received power of the LTE signal is above the third threshold, the channel in the unlicensed frequency band is idle, and if not, the channel in the unlicensed frequency band is not idle;
- or
- determining whether the channel in the unlicensed frequency band is idle, by comparing a received power of a signal of an operator other than a present operator in the channel in the unlicensed frequency band with a fourth threshold, wherein if the received power of the signal of the operator other than the present operator is above the fourth threshold, the channel in the unlicensed frequency band is not idle, and if not, the channel in the unlicensed frequency band is idle;
- or
- determining whether the channel in the unlicensed frequency band is idle, by comparing a received power of an LTE signal of an operator other than the present operator in the channel in the unlicensed frequency band with a fifth threshold, wherein if the received power of the LTE signal of the operator other than the present operator is above the fifth threshold, the channel in the unlicensed frequency band is not idle, and if not, the channel in the unlicensed frequency band is idle.
12 more elements
A method of discovering a cell, comprising:
- receiving a discovery signal in a channel in an unlicensed frequency band, wherein the discovery signal is transmitted when a base station determines that the channel in the unlicensed frequency band is idle;
- and
- discovering a cell of the base station based on the discovery signal;
- wherein the receiving the discovery signal in the channel in the unlicensed frequency band comprises:
- receiving discovery signal indication information which indicates whether the discovery signal is transmitted in the channel in the unlicensed frequency band;
- and receiving the discovery signal in the channel in the unlicensed frequency band if the discovery signal indication information indicates the discovery signal is transmitted in the channel in the unlicensed frequency band;
- determining whether the channel in the unlicensed frequency band is idle, based on a received power of the channel in the unlicensed frequency band;
- wherein the determining whether the channel in the unlicensed frequency band is idle based on the received power of the channel in the unlicensed frequency band comprises:
- determining whether the channel in the unlicensed frequency band is idle, by comparing a total received power of the channel in the unlicensed frequency band with a first threshold, wherein if the total received power is above the first threshold, the channel in the unlicensed frequency band is not idle, and if not, the channel in the unlicensed frequency band is idle;
- or
- determining whether the channel in the unlicensed frequency band is idle, by comparing a received power of a non-LTE signal in the channel in the unlicensed frequency band with a second threshold, wherein if the received power of the non-LTE signal is above the second threshold, the channel in the unlicensed frequency band is not idle, and if not, the channel in the unlicensed frequency band is idle;
- or determining whether the channel in the unlicensed frequency band is idle, by comparing a received power of an LTE signal in the channel in the unlicensed frequency band with a third threshold, wherein if the received power of the LTE signal is above the third threshold, the channel in the unlicensed frequency band is idle, and if not, the channel in the unlicensed frequency band is not idle;
- or
- determining whether the channel in the unlicensed frequency band is idle, by comparing a received power of a signal of an operator other than a present operator in the channel in the unlicensed frequency band with a fourth threshold, wherein if the received power of the signal of the operator other than the present operator is above the fourth threshold, the channel in the unlicensed frequency band is not idle, and if not, the channel in the unlicensed frequency band is idle;
- or
- determining whether the channel in the unlicensed frequency band is idle, by comparing a received power of an LTE signal of an operator other than the present operator in the channel in the unlicensed frequency band with a fifth threshold, wherein if the received power of the LTE signal of the operator other than the present operator is above the fifth threshold, the channel in the unlicensed frequency band is not idle, and if not, the channel in the unlicensed frequency band is idle.
13 more elements
A network side device, comprising:
- a processor;
- a memory, connected with the processor via a bus interface and configured to store programs and data used by the processor when performing operations;
- and
- a transceiver, configured to be controlled by the processor to receive and transmit data,
- when the processor calls and executes the program and data stored in the memory, the network side device realizes following steps:
- determining whether a channel in an unlicensed frequency band is idle;
- and
- transmitting through the transceiver a discovery signal in the channel in the unlicensed frequency band during a current cycle of a discovery signal transmission period if the channel in the unlicensed frequency band is determined to be idle;
- and
- not transmitting the discovery signal in the channel in the the unlicensed frequency band during the current cycle if the channel in the the unlicensed frequency band is determined to be not idle;
- wherein the determining whether the channel in the unlicensed frequency band is idle comprises:
- determining whether the channel in the unlicensed frequency band is idle, based on a received power of the channel in the unlicensed frequency band;
- wherein the determining whether the channel in the unlicensed frequency band is idle based on the received power of the channel in the unlicensed frequency band comprises:
- determining whether the channel in the unlicensed frequency band is idle, by comparing a total received power of the channel in the unlicensed frequency band with a first threshold, wherein if the total received power is above the first threshold, the channel in the unlicensed frequency band is not idle, and if not, the channel in the unlicensed frequency band is idle;
- or
- determining whether the channel in the unlicensed frequency band is idle, by comparing a received power of a non-LTE signal in the channel in the unlicensed frequency band with a second threshold, wherein if the received power of the non-LTE signal is above the second threshold, the channel in the unlicensed frequency band is not idle, and if not, the channel in the unlicensed frequency band is idle;
- or determining whether the channel in the unlicensed frequency band is idle, by comparing a received power of an LTE signal in the channel in the unlicensed frequency band with a third threshold, wherein if the received power of the LTE signal is above the third threshold, the channel in the unlicensed frequency band is idle, and if not, the channel in the unlicensed frequency band is not idle;
- or
- determining whether the channel in the unlicensed frequency band is idle, by comparing a received power of a signal of an operator other than a present operator in the channel in the unlicensed frequency band with a fourth threshold, wherein if the received power of the signal of the operator other than the present operator is above the fourth threshold, the channel in the unlicensed frequency band is not idle, and if not, the channel in the unlicensed frequency band is idle;
- or
- determining whether the channel in the unlicensed frequency band is idle, by comparing a received power of an LTE signal of an operator other than the present operator in the channel in the unlicensed frequency band with a fifth threshold, wherein if the received power of the LTE signal of the operator other than the present operator is above the fifth threshold, the channel in the unlicensed frequency band is not idle, and if not, the channel in the unlicensed frequency band is idle.
18 more elements
A user side device, comprising:
- a processor;
- a memory, connected with the processor via a bus interface and configured to store programs and data used by the processor when performing operations;
- and
- a transceiver, configured to be controlled by the processor to receive and transmit data,
- when the processor calls and executes the program and data stored in the memory, the user side device realizes following steps:
- receiving through the transceiver a discovery signal in a channel in an unlicensed frequency band, wherein the discovery signal is transmitted when a base station determines that the channel in the unlicensed frequency band is idle;
- and
- discovering a cell of the base station based on the discovery signal;
- wherein the receiving the discovery signal in the channel in the unlicensed frequency band comprises:
- receiving discovery signal indication information which indicates whether the discovery signal is transmitted in the channel in the unlicensed frequency band;
- and receiving the discovery signal in the channel in the unlicensed frequency band if the discovery signal indication information indicates the discovery signal is transmitted in the channel in the unlicensed frequency band;
- determining whether the channel in the unlicensed frequency band is idle, based on a received power of the channel in the unlicensed frequency band;
- wherein the determining whether the channel in the unlicensed frequency band is idle based on the received power of the channel in the unlicensed frequency band comprises:
- determining whether the channel in the unlicensed frequency band is idle, by comparing a total received power of the channel in the unlicensed frequency band with a first threshold, wherein if the total received power is above the first threshold, the channel in the unlicensed frequency band is not idle, and if not, the channel in the unlicensed frequency band is idle;
- or
- determining whether the channel in the unlicensed frequency band is idle, by comparing a received power of a non-LTE signal in the channel in the unlicensed frequency band with a second threshold, wherein if the received power of the non-LTE signal is above the second threshold, the channel in the unlicensed frequency band is not idle, and if not, the channel in the unlicensed frequency band is idle;
- or determining whether the channel in the unlicensed frequency band is idle, by comparing a received power of an LTE signal in the channel in the unlicensed frequency band with a third threshold, wherein if the received power of the LTE signal is above the third threshold, the channel in the unlicensed frequency band is idle, and if not, the channel in the unlicensed frequency band is not idle;
- or
- determining whether the channel in the unlicensed frequency band is idle, by comparing a received power of a signal of an operator other than a Present operator in the channel in the unlicensed frequency band with a fourth threshold, wherein if the received power of the signal of the operator other than the present operator is above the fourth threshold, the channel in the unlicensed frequency band is not idle, and if not, the channel in the unlicensed frequency band is idle;
- or
- determining whether the channel in the unlicensed frequency band is idle, by comparing a received power of an LTE signal of an operator other than the present operator in the channel in the unlicensed frequency band with a fifth threshold, wherein if the received power of the LTE signal of the operator other than the present operator is above the fifth threshold, the channel in the unlicensed frequency band is not idle, and if not, the channel in the unlicensed frequency band is idle.
18 more elements
Dependencies are inferred from the claim text.