Method, device and system for transmitting uplink information
View Patent ↗Disclosed are a method, device and system for transmitting uplink information, which are used for solving the problem that the existing UE uplink transmission mechanism may increase the load of a Macro eNB and increase the uplink interference among UEs, and is not beneficial to power saving of UEs. The method in the embodiments of the present application comprises: a macro eNB determining an uplink transmitting node used for receiving uplink information about a UE this time from a transmission node connected to the UE; determining the effective time of the uplink transmission node determined this time; and after the effective time of the uplink transmitting node determined this time has arrived, receiving the uplink information sent by the UE through the uplink transmitting node determined this time. Under a heterogeneous network, the embodiments of the present application can flexibly determine an appropriate uplink transmission node to transmit uplink information, thereby reducing the load of the Macro eNB, reducing the interference among various UEs, improving the system throughput, and saving the electric quantity of the UEs.
1. A method for transmitting uplink information, comprising:
determining, by a User Equipment (UE), from transmitting nodes connected therewith an uplink transmitting node to which uplink information of the UE needs to be transmitted currently;
determining, by the UE, an instance of time to enable the currently determined uplink transmitting node; and
transmitting, by the UE, the uplink information to the currently determined uplink transmitting node after the instance of time to enable the currently determined uplink transmitting node arrives;
wherein the determining, by the UE, the uplink transmitting node to which uplink information of the UE needs to be transmitted currently comprises:
selecting, by the UE, from the transmitting nodes connected therewith a transmitting node satisfying a preset determination criterion as the currently determined uplink transmitting node; or
determining, by the UE, a transmitting node serving a cell corresponding to identifier information signaled by a macro base station as the currently determined uplink transmitting node upon reception of the identifier information, wherein the identifier information comprises identifier information of one or more cells corresponding to the uplink transmitting node selected by the macro base station for the UE; or
determining, by the UE, the uplink transmitting node to which uplink information of the UE needs to be transmitted currently, according to a rule prescribed between the UE and the macro base station;
wherein after the UE selects the transmitting node satisfying the preset determination criterion as the currently determined uplink transmitting node and before the UE determines the instance of time to enable the currently determined uplink transmitting node, the method further comprises:
signaling, by the UE, the currently determined uplink transmitting node to the macro base station in higher-layer signaling upon determining that the currently determined uplink transmitting node is different from a lastly determined uplink transmitting node, wherein the higher-layer signaling carries the identifier information of the one or more cells corresponding to the currently determined uplink transmitting node;
wherein the identifier information is an index number of the cell; or the identifier information is a combination of a downlink (DL) frequency and a Physical Cell Identifier (PCI); or the identifier information is an ECGI.
2. The method according to claim 1 , wherein the determination criterion comprises one or more of the following criterions:
the UE selects an uplink transmitting node corresponding to a serving cell with a value of RSRP being the highest or more than a preset RSRP threshold as the currently determined uplink transmitting node according to measurement results of the UE for respective serving cells;
the UE selects an uplink transmitting node corresponding to a serving cell with a value of RSRQ being the highest or more than a preset RSRQ threshold as the currently determined uplink transmitting node according to measurement results of the UE for respective serving cells;
the UE selects an uplink transmitting node corresponding to a serving cell with a value of CQI being the highest or more than a preset CQI threshold as the currently determined uplink transmitting node according to measurement results of the UE for respective serving cells;
the UE selects an uplink transmitting node corresponding to a serving cell with a value of path loss being the lowest as the currently determined uplink transmitting node according to measurement results of the UE for respective serving cells; and
the UE determines distances between the UE and the respective transmitting nodes according to current location information of the UE and selects a transmitting node with the distance being the shortest as the currently determined uplink transmitting node.
3. The method according to claim 1 , wherein if the signaling transmitted by the macro base station is physical layer signaling which carries uplink scheduling information, then determining, by the UE, the uplink transmitting node to which uplink information of the UE needs to be transmitted currently comprises:
determining, by the UE, a transmitting node serving a cell corresponding to the uplink scheduling information carried in the physical layer signaling as the uplink transmitting node to which the uplink information of the UE needs to be transmitted currently.
4. The method according to claim 1 wherein the prescribed rule comprises such a rule that a different transmitting node is selected in each preset change cycle as an uplink transmitting node determined each time;
wherein the change cycles and offsets of different UEs are configured by the macro base station or prescribed between the macro base station and the respective UEs.
5. The method according to claim 1 , wherein determining, by the UE, the instance of time to enable the currently determined uplink transmitting node comprises:
determining, by the UE, the instance of time to enable the currently determined uplink transmitting node, according to an instance of time when the UE transmits the higher-layer signaling, and an enabling instance of time prescribed between the UE and the macro base station; or
determining, by the UE, the instance of time to enable the currently determined uplink transmitting node, according to an instance of time when the macro base station transmits the signaling, and an enabling instance of time prescribed between the UE and the macro base station; or
determining, by the UE, an instance of time when the UE receives the identifier information transmitted by the macro base station as the instance of time to enable the currently determined uplink transmitting node; or
if the signaling transmitted by the macro base station is physical layer signaling, then determining, by the UE, a sub-frame carrying the physical layer signaling as the instance of time to enable the currently determined uplink transmitting node; or
determining, by the UE, the instance of time to enable the currently determined uplink transmitting node, according to a current System Frame Number (SFN), sub-frame number and offset, and a change cycle corresponding to the uplink transmitting node.
6. The method according to claim 1 , wherein transmitting, by the UE, the uplink information to the currently determined uplink transmitting node comprises:
transmitting, by the UE, the uplink information over an uplink carrier corresponding to the currently determined uplink transmitting node;
wherein if a plurality of component carriers among carriers aggregated for the UE are configured with Physical Uplink Control Channels (PUCCHs), then transmitting, by the UE, the uplink information over the uplink carrier corresponding to the currently determined uplink transmitting node comprises:
transmitting, by the UE, the uplink information over a component carrier served by the currently determined uplink transmitting node and configured with a PUCCH.
7. The method according to claim 1 , wherein after the UE determines the instance of time to enabling the currently determined uplink transmitting node, the method further comprises one or more of the steps of:
deleting, by the UE, an uplink scheduling configuration, stored by the UE, corresponding to a lastly determined uplink transmitting node;
storing, by the UE, a value of Timing Advance (TA) of a cell or a Timing Advance Group (TAG) corresponding to the lastly determined uplink transmitting node;
stopping, by the UE, an SRS, a Dedicated Scheduling Request (DSR) and a CQI from being transmitted to the lastly determined uplink transmitting node;
determining, by the UE, a value of TA of a cell corresponding to the currently determined uplink transmitting node; and
deleting, by the UE, a HARQ buffer, stored by the UE, of the cell corresponding to the lastly determined uplink transmitting node;
wherein determining, by the UE, the value of TA of the cell corresponding to the currently determined uplink transmitting node comprises:
determining, by the UE, the value of TA of the cell corresponding to the currently determined uplink transmitting node according to a received Timing Advance Command (TAC) Media Access Control (MAC) Control Element (CE) transmitted by the macro base station, and the value of TA, stored by the UE, of the cell or the TAG corresponding to the lastly determined uplink transmitting node after the uplink transmitting node to currently transmit the uplink information is determined; or
obtaining, by the UE, the value of TA of the cell corresponding to the currently determined uplink transmitting node in a Random Access (RA) procedure after the uplink transmitting node, to which the uplink information of the UE needs to be transmitted currently, is determined.
8. A User Equipment (UE), comprising:
a processor configured to determine from transmitting nodes connected with the UE an uplink transmitting node to which uplink information of the UE needs to be transmitted currently, and determine an instance of time to enable the currently determined uplink transmitting node; and
a transmitter configured to transmit the uplink information to the currently determined uplink transmitting node after the instance of time to enable the currently determined uplink transmitting node arrives;
wherein the processor is configured:
to select from the transmitting nodes connected with the UE a transmitting node satisfying a preset determination criterion as the currently determined uplink transmitting node; or
to determine a transmitting node serving a cell corresponding to identifier information signaled by a macro base station as the currently determined uplink transmitting node upon reception of the identifier information, wherein the identifier information comprises identifier information of one or more cells corresponding to the uplink transmitting node selected by the macro base station for the UE; or
to determine the uplink transmitting node to which the uplink information of the UE needs to be transmitted currently, according to a rule prescribed between the UE and the macro base station;
wherein the processor is further configured:
to signal the currently determined uplink transmitting node to the macro base station in higher-layer signaling if it is determined that the currently determined uplink transmitting node is different from a lastly determined uplink transmitting node after the transmitting node satisfying the preset determination criterion is selected as the currently determined uplink transmitting node and before the instance of time to enable the currently determined uplink transmitting node is determined, wherein the higher-layer signaling carries the identifier information of the one or more cells corresponding to the currently determined uplink transmitting node; wherein the identifier information is an index number of the cell; or the identifier information is a combination of a downlink (DL) frequency and a Physical Cell Identifier (PCI); or the identifier information is an ECGI.
9. The UE according to claim 8 , wherein the processor is configured:
to determine the instance of time to enable the currently determined uplink transmitting node, according to an instance of time when the UE transmits the higher-layer signaling, and an enabling instance of time prescribed between the UE and the macro base station; or
to determine the instance of time to enable the currently determined uplink transmitting node, according to an instance of time when the macro base station transmits the signaling, and an enabling instance of time prescribed between the UE and the macro base station; or
to determine an instance of time when the UE receives the identifier information transmitted by the macro base station as the instance of time to enable the currently determined uplink transmitting node; or
if the signaling transmitted by the macro base station is physical layer signaling, to determine a sub-frame carrying the physical layer signaling as the instance of time to enable the currently determined uplink transmitting node; or
to determine the instance of time to enable the currently determined uplink transmitting node, according to a current System Frame Number (SFN), sub-frame number and offset, and a change cycle corresponding to the uplink transmitting node.