Uplink transmission resource scheduling method and device, and uplink transmission method and device
Disclosed are an uplink transmission resource scheduling method and device, and an uplink transmission method and device, which are used for reserving an uplink transmission resource on an unlicensed carrier, enabling a user equipment (UE) not to transmit an uplink signal on the reserved resource and avoiding a case in which the scheduled UE cannot access a channel, and can realize time division multiplexing of uplink transmission resources on the unlicensed carrier. An uplink transmission resource scheduling method provided by the present application comprises: a base station determines a reserved resource in an uplink subframe, the reserved resource being a transmission resource on an unlicensed carrier; and the base station sends a notification about the reserved resource in the uplink subframe to a UE.
1. A method for scheduling an uplink transmission resource, the method comprising:
determining, by a base station, a Listen Before Talk (LBT) resource over an unlicensed carrier in an uplink sub-frame, the LBT resource is used for a first user equipment that has not accessed a channel, to perform LBT operations; and
notifying explicitly, by the base station, a second user equipment that has accessed the channel of not transmitting any uplink signal over the LBT resource, by sending a notification of the LBT resource to the second user equipment via a UL grant, wherein the LBT resource is located in the last one or N symbols, or the first one or N symbols of the uplink sub-frame, and N is an integer greater than 1.
2. The method according to claim 1 , wherein the base station sends the notification of the LBT resource in the uplink sub-frame to the second user equipment semi-statically or dynamically.
3. The method according to claim 2 , wherein sending, by the base station, the notification of the LBT resource in the uplink sub-frame to the second user equipment comprises:
when the base station sends the notification of the LBT resource in the uplink sub-frame to the second user equipment semi-statically, sending, by the base station, the notification of the LBT resource in the uplink sub-frame to the second user equipment via non-physical layer signaling; or
when the base station sends the notification of the LBT resource in the uplink sub-frame to the second user equipment dynamically, sending, by the base station, the notification of the LBT resource in the uplink sub-frame to the second user equipment via physical layer signaling.
4. The method according to claim 1 , wherein the notification carries one or a combination of:
an indicator that the second user equipment needs to reserve the resource in the uplink sub-frame;
the uplink sub-frame comprising the LBT resource, and a position of the LBT resource in the uplink sub-frame; and
a size of the LBT resource in the uplink sub-frame comprising the LBT resource.
5. A method for uplink transmission, the method comprising:
receiving, by a second user equipment that has accessed a channel, a notification of a Listen Before Talk (LBT) resource over an unlicensed carrier in an uplink sub-frame, notified by a base station explicitly via a UL grant, wherein the LBT resource is located in the last one or N symbols, or the first one or N symbols of the uplink sub-frame, and N is an integer greater than 1;
determining, by the second user equipment, the LBT resource in the uplink sub-frame according to the notification, the LBT resource is used for a first user equipment that has not accessed the channel, to perform LBT operations;
not transmitting, by the second user equipment, any uplink signal over the LBT resource; and
transmitting, by the second user equipment, uplink signals over resources other than the LBT resource in the uplink-sub-frame.
6. The method according to claim 5 , wherein the LBT resource in the uplink sub-frame, is preconfigured; or
the second user equipment, receives the notification of the LBT resource in the uplink sub-frame, sent semi-statically or dynamically by the base station, and determines from the notification the LBT resource in the uplink sub-frame.
7. An apparatus for scheduling an uplink transmission resource, the apparatus comprising:
a memory storing computer programs, a transceiver and a processor; and
the processor configured to read the computer programs in the memory to perform operations comprising:
determine a Listen Before Talk (LBT) resource over an unlicensed carrier in an uplink sub-frame, wherein the LBT resource is used for a first user equipment that has not accessed a channel to perform LBT operations; and
notify explicitly a second user equipment that has accessed the channel of not transmitting any uplink signal over the LBT resource, by sending a notification of the LBT resource to the second user equipment via a UL grant, wherein the LBT resource is located in the last one or N symbols, or the first one or N symbols of the uplink sub-frame, and N is an integer greater than 1.
8. The apparatus according to claim 7 , wherein the processor is further configured to read the computer programs in the memory to:
send the notification of the LBT resource in the uplink sub-frame to the second user equipment semi-statically or dynamically.
9. The apparatus according to claim 8 , wherein the processor is further configured to read the computer programs in the memory to:
when the notification of the LBT resource in the uplink sub-frame is sent to the second user equipment semi-statically, send the notification of the LBT resource in the uplink sub-frame to the second user equipment via non-physical layer signaling; or
when the notification of the LBT resource in the uplink sub-frame is sent to the second user equipment dynamically, send the notification of the LBT resource in the uplink sub-frame to the second user equipment via physical layer signaling.
10. The apparatus according to claim 7 , wherein the notification carries one or a combination of:
an indicator that the second user equipment needs to reserve the resource in the uplink sub-frame;
the uplink sub-frame comprising the LBT resource, and a position of the LBT resource in the uplink sub-frame; and
a size of the LBT resource in the uplink sub-frame comprising the LBT resource.
11. The apparatus according to claim 7 , wherein the LBT resource is located at a head or a tail of at least one uplink sub-frame.
12. A method for uplink transmission, the method comprising:
receiving, by a second user equipment that has accessed a channel after listen before talk (LBT) operations, a notification of a LBT resource over an unlicensed carrier in an uplink sub-frame, notified by a base station explicitly via a UL grant, the LBT resource used for a first user equipment that desires to send uplink signals and has not accessed the channel, to perform the LBT operations, and the LBT resource is located in the last one or N symbols, or the first one or N symbols of the uplink sub-frame, and N is an integer greater than 1;
transmitting, by the second user equipment, uplink signals over resources other than the LBT resource in the uplink sub-frame;
determining, by the first user equipment, that the channel is clear by performing the LBT operations on the LBT resource; and
accessing, by the first user equipment, the channel.