CN102468948B - Method and system for carrying out non-periodic scheduling through physical downlink control channel (PDCCH) - Google Patents
Method and system for carrying out non-periodic scheduling through physical downlink control channel (PDCCH) Download PDFInfo
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Abstract
The invention provides a method and system for carrying out non-periodic scheduling through a physical downlink control channel (PDCCH). A processing procedure of a base station comprises the following steps: A1, sending a scheduled configuration signaling to user equipment (UE) by a base station through the PDCCH, wherein the time of sending the scheduled uplink signaling is stipulated in the scheduled configuration signaling; B1, detecting that whether the scheduled uplink signaling from the UE is received or not by the base station at the time of sending the scheduled uplink signaling, constructing a new scheduled configuration signaling if the scheduled uplink signaling from the UE is received and returning to the step A1, or resending the same scheduled configuration signaling to the UE by the base station through the PDCCH if the scheduled uplink signaling from the UE is not received and repeatedly implementing the step B1. The invention further provides other methods and systems of carrying out non-periodic scheduling through the PDCCH. The scheme of the invention can be used for confronting the influence of wireless channel decline and improving the service capacity decline caused by missed detection or false detection of the scheduled configuration signaling.
Description
Technical Field
The present invention relates to the field of wireless communication technologies, and in particular, to a method and a system for performing aperiodic scheduling through a Physical Downlink Control Channel (PDCCH).
Background
In an LTE system, User Equipment (UE) sends a measurement Signal (SRS) using a certain resource at a certain time-frequency position according to configuration Information of a base station (eNB), and the eNB measures Channel State Information (CSI) according to the received SRS Information and performs operations such as dynamic scheduling, power control, resource allocation, and the like according to the measured CSI Information.
In a further evolution of the LTE system, SRS may be transmitted aperiodically through dynamic scheduling of control channels.
In a wireless communication system, data transmission is unreliable due to fading characteristics of a wireless channel, and therefore, aperiodic SRS scheduling command transmission is performed through control channel scheduling. Due to the fact that a certain missed detection error detection probability exists in wireless transmission of the control channel (about 1%, see protocol document 36.101-930 for details, for example, the missed detection error detection probability of a Physical Downlink Control Channel (PDCCH) is 1%), meanwhile, due to the fact that a retransmission mechanism does not exist in the control channel, an aperiodic SRS scheduling signaling is lost, and further, the UE cannot correctly send the SRS, and therefore service performance is affected.
Disclosure of Invention
In view of this, the present invention provides a method and a system for performing aperiodic scheduling through a physical downlink control channel PDCCH, which can improve the problem of service performance degradation caused by missed detection and false detection of a control channel scheduling SRS.
The embodiment of the invention provides a method for non-periodic scheduling through a PDCCH (physical Downlink control channel), wherein the processing process of a base station comprises the following steps:
a1, the base station sends down a scheduling configuration signaling to User Equipment (UE) through a PDCCH, wherein the scheduling configuration signaling specifies the sending time of a scheduled uplink signaling;
b1, the base station detects whether the scheduled uplink signaling from the UE is received at the sending time of the scheduled uplink signaling, if so, a new scheduling configuration signaling is constructed, and the step A1 is returned; otherwise, the base station sends the same scheduling configuration signaling to the UE again through the PDCCH, and repeatedly performs step B1.
Preferably, the base station sends the scheduling configuration signaling to the UE through the PDCCH and starts a timer while sending the same scheduling configuration signaling to the UE through the PDCCH again, and the duration of the timer is greater than or equal to the time difference between the sending time of the scheduled uplink signaling and the sending time of the scheduling configuration signaling;
the base station detects whether the scheduled uplink signaling from the UE is received at the sending time of the scheduled uplink signaling, and the detection is as follows: and the base station judges whether the scheduled uplink signaling from the UE is received before the timer is overtime.
Preferably, the scheduling configuration signaling is a measurement signal sending indication signaling, a channel quality indication dynamic configuration signaling or a carrier aggregation dynamic activation configuration signaling.
Preferably, the processing at the base station side further comprises:
the base station receives the scheduled uplink signaling from the UE, judges whether the quality of the received scheduled uplink signaling meets the triggering condition of repeatedly sending the scheduling configuration signaling, if so, the base station repeatedly sends M scheduling configuration signaling in the same subframe through the PDCCH, or the base station sends one scheduling configuration signaling in each subframe in N continuous subframes.
Preferably, the triggering condition for satisfying the repeated transmission of the scheduling configuration signaling is:
the intensity of the scheduled uplink signaling is lower than a preset signal intensity threshold;
the error rate of the scheduled uplink signaling exceeds a preset error rate threshold; or,
the times of repeatedly sending the same scheduling configuration signaling by the base station exceed the preset maximum times.
Preferably, M is 2 or 4.
Preferably, N is 2, 3 or 4.
The embodiment of the invention also provides another method for performing non-periodic scheduling through the PDCCH, and the processing process of the base station side comprises the following steps:
a2, the base station sends down a scheduling configuration signaling to User Equipment (UE) through a PDCCH, wherein the scheduling configuration signaling specifies the sending time of a scheduled uplink signaling;
b2, the base station judges whether the next sub-frame of the down-sending scheduling configuration signaling receives the acknowledgement message ACK from the UE, if yes, the base station constructs a new scheduling configuration signaling and returns to the step A2; otherwise, the base station sends the same scheduling configuration signaling to the UE again, and repeatedly executes step B2;
the processing procedure of the User Equipment (UE) side comprises the following steps: and after receiving the scheduling configuration signaling, the UE immediately sends an acknowledgement message ACK to the base station in the next subframe, and then sends the scheduled uplink signaling at the sending time of the scheduled uplink signaling specified by the scheduling configuration signaling.
Preferably, the processing at the base station side further comprises:
the base station receives the scheduled uplink signaling from the UE, judges whether the quality of the received scheduled uplink signaling meets the triggering condition of repeatedly sending the scheduling configuration signaling, if so, the base station repeatedly sends M scheduling configuration signaling in the same subframe through the PDCCH, or the base station sends one scheduling configuration signaling in each subframe in N continuous subframes.
Preferably, the triggering condition for satisfying the repeated transmission of the scheduling configuration signaling is:
the intensity of the scheduled uplink signaling is lower than a preset signal intensity threshold;
the error rate of the scheduled uplink signaling exceeds a preset error rate threshold; or,
the times of repeatedly sending the same scheduling configuration signaling by the base station exceed the preset maximum times.
The embodiment of the invention provides another method for non-periodic scheduling through a PDCCH, and the processing of a base station side comprises the following steps:
the base station receives an uplink signaling from UE, judges whether the quality of the received uplink signaling meets the triggering condition of repeatedly sending a scheduling configuration signaling for scheduling the uplink signaling, if so, the base station repeatedly sends M scheduling configuration signaling in the same subframe through a Physical Downlink Control Channel (PDCCH), or the base station sends one scheduling configuration signaling in each subframe in N continuous subframes.
The embodiment of the invention also provides a system for non-periodic scheduling through PDCCH, which comprises a base station and User Equipment (UE), and is characterized in that,
the base station is used for issuing a scheduling configuration signaling to User Equipment (UE) through a Physical Downlink Control Channel (PDCCH), wherein the scheduling configuration signaling specifies the sending time of a scheduled uplink signaling; the base station is also used for detecting whether the scheduled uplink signaling from the UE is received at the sending time of the scheduled uplink signaling, if so, a new scheduling configuration signaling is constructed and sent to the UE; otherwise, the base station sends the same scheduling configuration signaling to the UE again through the PDCCH;
and the UE is used for sending the scheduled uplink signaling at the sending time of the scheduled uplink signaling specified by the scheduling configuration signaling after receiving the scheduling configuration signaling.
Preferably, the base station is further configured to start a timer while issuing the scheduling configuration signaling to the UE through the PDCCH and sending the same scheduling configuration signaling to the UE again through the PDCCH, where a duration of the timer is greater than or equal to a time difference between a sending time of the scheduled uplink signaling and a time of sending the scheduling configuration signaling;
the base station detects whether the scheduled uplink signaling from the UE is received at the sending time of the scheduled uplink signaling, and the detection is as follows: and the base station judges whether the scheduled uplink signaling from the UE is received before the timer is overtime.
Preferably, the scheduling configuration signaling is a measurement signal sending indication signaling, a channel quality indication dynamic configuration signaling or a carrier aggregation dynamic activation configuration signaling.
Preferably, the base station is further configured to:
receiving a scheduled uplink signaling from UE, and judging whether the quality of the received scheduled uplink signaling meets the triggering condition of repeatedly sending scheduling configuration signaling, if so, repeatedly sending M scheduling configuration signaling in the same subframe through PDCCH, or sending one scheduling configuration signaling in each subframe in continuous N subframes.
Preferably, the triggering condition for satisfying the repeated transmission of the scheduling configuration signaling is:
the intensity of the scheduled uplink signaling is lower than a preset signal intensity threshold;
the error rate of the scheduled uplink signaling exceeds a preset error rate threshold; or,
the times of repeatedly sending the same scheduling configuration signaling by the base station exceed the preset maximum times.
The embodiment of the invention provides another system for performing non-periodic scheduling through a PDCCH, which comprises a base station and UE and is characterized in that,
the base station is used for issuing a scheduling configuration signaling to the UE through the PDCCH, and the scheduling configuration signaling specifies the sending time of the scheduled uplink signaling; and is used for judging whether the next subframe which sends the scheduling configuration signaling receives the acknowledgement message ACK from the UE, if yes, the new scheduling configuration signaling is constructed and sent to; otherwise, the base station sends the same scheduling configuration signaling to the UE again;
the UE is configured to: and after receiving the scheduling configuration signaling, immediately sending an acknowledgement message ACK to the base station in the next subframe, and then sending the scheduled uplink signaling at the sending time of the scheduled uplink signaling specified by the scheduling configuration signaling.
Preferably, the base station is further configured to:
receiving a scheduled uplink signaling from UE, and judging whether the quality of the received scheduled uplink signaling meets the triggering condition of repeatedly sending scheduling configuration signaling, if so, the base station repeatedly sends M scheduling configuration signaling in the same subframe through a PDCCH (physical Downlink control channel), or the base station sends one scheduling configuration signaling in each subframe in N continuous subframes.
The embodiment of the invention provides another system for performing non-periodic scheduling through a Physical Downlink Control Channel (PDCCH), which comprises a base station and User Equipment (UE), wherein the base station is used for: receiving an uplink signaling from UE, judging whether the quality of the received uplink signaling meets the triggering condition of repeatedly sending a scheduling configuration signaling for scheduling the uplink signaling, if so, repeatedly sending M scheduling configuration signaling in the same subframe through a Physical Downlink Control Channel (PDCCH), and sending one scheduling configuration signaling by each subframe in N continuous subframes by a base station;
and the UE is used for sending the scheduled uplink signaling to the base station after receiving the scheduling configuration signaling from the base station.
It can be seen from the above technical solutions that a retransmission mechanism of the scheduling configuration signaling is added in the process of performing aperiodic scheduling through the PDCCH, and the same scheduling configuration signaling is repeatedly transmitted when a certain condition is satisfied. The scheme of the invention can resist the influence of the fading of the wireless channel and improve the reduction of the service capability caused by the missed detection and the false detection of the scheduling configuration signaling.
Drawings
Fig. 1 is a schematic processing flow diagram of a base station according to a first embodiment of the present invention;
fig. 2 is a schematic processing flow diagram of a base station according to a second embodiment of the present invention;
fig. 3 is a schematic processing flow diagram of a base station according to a third embodiment of the present invention.
Detailed Description
According to the embodiment of the invention, in the process of the non-periodic SRS signal scheduling, a retransmission mechanism of the SRS sending indication signaling is added to resist the influence of the fading of a wireless channel on the non-periodic SRS signal scheduling, so that the reliability of the non-periodic SRS scheduling is improved. The invention is illustrated in detail below by means of a number of examples.
The first embodiment is as follows: and the base station eNB realizes the retransmission of the SRS sending indication signaling through an automatic error detection technology.
In the first embodiment, after receiving the SRS transmission instruction signaling, the UE transmits the SRS at the SRS transmission timing specified by the SRS transmission instruction signaling. In the first embodiment, the processing flow of the base station is shown in fig. 1, and includes the following steps:
step 101: and the base station sends an SRS sending indication signaling to the UE, wherein the SRS sending indication signaling specifies the SRS sending time.
Step 102: and the base station detects whether the SRS from the UE is received or not at the SRS sending time, if so, executing step 104, otherwise, executing step 103.
Step 103: the base station sends the same SRS transmission indication signaling to the UE again, and returns to execute step 102.
Step 104: and constructing a new SRS sending indication signaling, and returning to the step 101.
The scheme of the first embodiment can also adopt the following implementation mode: the base station starts a timer when sending the SRS sending indication signaling, and the duration of the timer is greater than or equal to the time difference between the sending time of the SRS and the sending time of the SRS sending indication signaling. And the base station judges whether the timer receives the SRS from the UE before overtime, if so, the flow is ended, otherwise, the base station sends the SRS sending indication signaling to the UE again.
A disadvantage of the first embodiment is that the delay is relatively large.
Example two: and the UE realizes the retransmission of the SRS sending indication signaling through an automatic request retransmission technology.
In the second embodiment, after receiving the SRS transmission instruction signaling, the UE immediately transmits an acknowledgement message ACK to the base station in the next subframe, and then transmits the SRS at the SRS transmission timing specified by the SRS transmission instruction signaling.
The processing flow of the base station in the second embodiment is shown in fig. 2, and includes the following steps:
step 201: and the base station sends an SRS sending indication signaling to the UE. The SRS transmission instruction signaling specifies the SRS transmission time.
Step 202: the base station judges whether the next subframe which sends the SRS sending instruction is received
If the ACK is the acknowledgement message from the UE, go to step 204; otherwise step 203 is performed.
Step 203: the base station sends the same SRS transmission indication signaling to the UE again, and returns to execute step 202.
Step 204: constructs a new SRS transmission indication signaling and returns to step 201.
Compared with the first embodiment, the time delay of the second embodiment is greatly reduced, but the second embodiment needs to increase the acknowledgment message sending signaling, and increases the air interface overhead.
Example three: and the base station eNB realizes the retransmission of the SRS sending indication signaling through a redundancy sending technology.
The third basic idea of the embodiment is that, when the base station eNB determines that the UE signal is lower than a certain threshold, multiple SRS transmission indication signaling of the UE are transmitted in the same PDCCH channel; or, the SRS transmission instruction signaling of the UE is transmitted in PDCCHs of a plurality of consecutive downlink subframes.
The processing flow of the third embodiment is shown in fig. 3, and includes the following steps:
step 301: the base station performs aperiodic SRS scheduling according to the prior art or the manner of the first embodiment or the second embodiment.
Step 302: and the base station receives the SRS signal from the UE, judges whether the quality of the received SRS signal meets the triggering condition of repeatedly transmitting the SRS transmission indicating signal, if so, executes the step 303, otherwise, returns to the step 301.
The triggering condition for repeatedly transmitting the SRS transmission instruction signal may be any one of the following conditions:
whether the strength of the SRS signal is lower than a preset signal strength threshold value or not, and if so, the triggering condition is met;
whether the error rate of the SRS signal exceeds a preset error rate threshold value or not, and if so, meeting the triggering condition; or,
and the base station repeatedly sends the same SRS sending indication signaling for a number of times exceeding a preset maximum number of times according to the mode of the first embodiment or the second embodiment, and the triggering condition is met.
Step 303: the base station repeatedly sends M SRS sending indication signaling in the same subframe through a PDCCH channel, or the base station sends one SRS sending indication signaling in each subframe in continuous N subframes. Preferably, the base station configures a repeat transmission indication before each PDCCH for repeatedly transmitting the SRS transmission indication signaling to notify the UE that the SRS transmission indication signaling is to be repeatedly transmitted; alternatively, the UE is notified by radio resource control signaling (RRC) or other means that the SRS transmission indication signaling is to be repeatedly transmitted.
Preferably, M is 2 or 4. And N is 2, 3 or 4.
The above embodiments all utilize the PDCCH to aperiodically schedule the SRS, and the inventive concept embodied in the embodiments is also applicable to aperiodically schedule other types of uplink signaling through the PDCCH, such as aperiodic CQI scheduling and dynamic carrier aggregation (CC) active scheduling.
The processing procedure of the base station of the first embodiment can be expressed as including the following steps:
a1, the base station sends down a scheduling configuration signaling to User Equipment (UE) through a PDCCH, wherein the scheduling configuration signaling specifies the sending time of a scheduled uplink signaling;
b1, the base station detects whether the scheduled uplink signaling from the UE is received at the sending time of the scheduled uplink signaling, if so, a new scheduling configuration signaling is constructed, and the step A1 is returned; otherwise, the base station sends the same scheduling configuration signaling to the UE again through the PDCCH, and repeatedly performs step B1.
The scheduling configuration signaling may be a measurement signal transmission indication signaling, a channel quality indication dynamic configuration signaling, or a carrier aggregation dynamic activation configuration signaling, and is respectively corresponding to the aperiodic scheduling SRS, the aperiodic scheduling CQI, and the aperiodic carrier aggregation activation scheduling.
The fourth embodiment of the present invention provides a system for performing aperiodic scheduling through a PDCCH, which includes a base station and a UE,
the base station is used for issuing a scheduling configuration signaling to User Equipment (UE) through a Physical Downlink Control Channel (PDCCH), wherein the scheduling configuration signaling specifies the sending time of a scheduled uplink signaling; the base station is also used for detecting whether the scheduled uplink signaling from the UE is received at the sending time of the scheduled uplink signaling, if so, a new scheduling configuration signaling is constructed and sent to the UE; otherwise, the base station sends the same scheduling configuration signaling to the UE again through the PDCCH;
and the UE is used for sending the scheduled uplink signaling at the sending time of the scheduled uplink signaling specified by the scheduling configuration signaling after receiving the scheduling configuration signaling.
Preferably, the base station is further configured to start a timer while issuing the scheduling configuration signaling to the UE through the PDCCH and sending the same scheduling configuration signaling to the UE again through the PDCCH, where a duration of the timer is greater than or equal to a time difference between a sending time of the scheduled uplink signaling and a time of sending the scheduling configuration signaling;
the base station detects whether the scheduled uplink signaling from the UE is received at the sending time of the scheduled uplink signaling, and the detection is as follows: and the base station judges whether the scheduled uplink signaling from the UE is received before the timer is overtime.
Preferably, the scheduling configuration signaling is a measurement signal sending indication signaling, a channel quality indication dynamic configuration signaling or a carrier aggregation dynamic activation configuration signaling.
Preferably, the base station is further configured to:
receiving a scheduled uplink signaling from UE, and judging whether the quality of the received scheduled uplink signaling meets the triggering condition of repeatedly sending scheduling configuration signaling, if so, repeatedly sending M scheduling configuration signaling in the same subframe through PDCCH, or sending one scheduling configuration signaling in each subframe in continuous N subframes.
Preferably, the triggering condition for satisfying the repeated transmission of the scheduling configuration signaling is:
the intensity of the scheduled uplink signaling is lower than a preset signal intensity threshold;
the error rate of the scheduled uplink signaling exceeds a preset error rate threshold; or,
the times of repeatedly sending the same scheduling configuration signaling by the base station exceed the preset maximum times.
Fifth, an embodiment of the present invention provides a system for performing aperiodic scheduling through a PDCCH, where the system includes a base station and a UE,
the base station is used for issuing a scheduling configuration signaling to the UE through the PDCCH, and the scheduling configuration signaling specifies the sending time of the scheduled uplink signaling; and is used for judging whether the next subframe which sends the scheduling configuration signaling receives the acknowledgement message ACK from the UE, if yes, the new scheduling configuration signaling is constructed and sent to; otherwise, the base station sends the same scheduling configuration signaling to the UE again;
the UE is configured to: and after receiving the scheduling configuration signaling, immediately sending an acknowledgement message ACK to the base station in the next subframe, and then sending the scheduled uplink signaling at the sending time of the scheduled uplink signaling specified by the scheduling configuration signaling.
Preferably, the base station is further configured to:
receiving a scheduled uplink signaling from UE, and judging whether the quality of the received scheduled uplink signaling meets the triggering condition of repeatedly sending scheduling configuration signaling, if so, the base station repeatedly sends M scheduling configuration signaling in the same subframe through a PDCCH (physical Downlink control channel), or the base station sends one scheduling configuration signaling in each subframe in N continuous subframes.
The sixth embodiment of the present invention provides a system for performing aperiodic scheduling through a PDCCH, where the system includes a base station and user equipment UE, and the base station is configured to: receiving an uplink signaling from UE, judging whether the quality of the received uplink signaling meets the triggering condition of repeatedly sending a scheduling configuration signaling for scheduling the uplink signaling, if so, repeatedly sending M scheduling configuration signaling in the same subframe through a Physical Downlink Control Channel (PDCCH), and sending one scheduling configuration signaling by each subframe in N continuous subframes by a base station;
and the UE is used for sending the scheduled uplink signaling to the base station after receiving the scheduling configuration signaling from the base station.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (12)
1. A method for non-periodic scheduling through a Physical Downlink Control Channel (PDCCH) is characterized in that a processing process of a base station comprises the following steps:
a1, the base station sends down a scheduling configuration signaling to User Equipment (UE) through a PDCCH, wherein the scheduling configuration signaling specifies the sending time of a scheduled uplink signaling;
b1, the base station detects whether the scheduled uplink signaling from the UE is received at the transmission time of the scheduled uplink signaling, if so, the step C1 is executed; otherwise, the base station sends the same scheduling configuration signaling to the UE again through the PDCCH, and repeatedly executes step B1;
c1, the base station judges whether the quality of the received scheduled uplink signaling meets the triggering condition of repeatedly sending the scheduling configuration signaling, if yes, the base station repeatedly sends M scheduling configuration signaling in the same subframe through the PDCCH, or the base station sends a scheduling configuration signaling in each subframe in continuous N subframes; otherwise, constructing a new scheduling configuration signaling, and returning to the step A1;
the triggering condition meeting the requirement of repeatedly sending the scheduling configuration signaling is as follows:
the intensity of the scheduled uplink signaling is lower than a preset signal intensity threshold;
the error rate of the scheduled uplink signaling exceeds a preset error rate threshold; or,
the times of repeatedly sending the same scheduling configuration signaling by the base station exceed the preset maximum times.
2. The method of claim 1, wherein the base station starts a timer when issuing the scheduling configuration signaling to the UE through the PDCCH and the base station re-sends the same scheduling configuration signaling to the UE through the PDCCH, and the duration of the timer is greater than or equal to the time difference between the sending time of the scheduled uplink signaling and the sending time of the scheduling configuration signaling;
the base station detects whether the scheduled uplink signaling from the UE is received at the sending time of the scheduled uplink signaling, and the detection is as follows: and the base station judges whether the scheduled uplink signaling from the UE is received before the timer is overtime.
3. The method of claim 1, wherein the scheduling configuration signaling is measurement signaling indication signaling, channel quality indication dynamic configuration signaling, or carrier aggregation dynamic activation configuration signaling.
4. The method of claim 1, wherein M is 2 or 4.
5. The method of claim 1, wherein N is 2, 3, or 4.
6. A method for non-periodic scheduling through a Physical Downlink Control Channel (PDCCH) is characterized in that a processing process at a base station side comprises the following steps:
a2, the base station sends down a scheduling configuration signaling to User Equipment (UE) through a PDCCH, wherein the scheduling configuration signaling specifies the sending time of a scheduled uplink signaling;
b2, the base station judges whether the next sub-frame of the down-sending scheduling configuration signaling receives the acknowledgement message ACK from the UE, if yes, the step C2 is executed; otherwise, the base station sends the same scheduling configuration signaling to the UE again, and repeatedly executes step B2;
the processing procedure of the User Equipment (UE) side comprises the following steps: after receiving the scheduling configuration signaling, the UE immediately sends an acknowledgement message ACK to the base station in the next subframe, and then sends the scheduled uplink signaling at the sending time of the scheduled uplink signaling specified by the scheduling configuration signaling;
c2, the base station receives the scheduled uplink signaling from the UE, and judges whether the quality of the received scheduled uplink signaling meets the triggering condition of repeatedly sending the scheduling configuration signaling, if yes, the base station repeatedly sends M scheduling configuration signaling in the same subframe through the PDCCH, or the base station sends one scheduling configuration signaling in each subframe in continuous N subframes; otherwise, constructing a new scheduling configuration signaling, and returning to the step A2;
the triggering condition meeting the requirement of repeatedly sending the scheduling configuration signaling is as follows:
the intensity of the scheduled uplink signaling is lower than a preset signal intensity threshold;
the error rate of the scheduled uplink signaling exceeds a preset error rate threshold; or,
the times of repeatedly sending the same scheduling configuration signaling by the base station exceed the preset maximum times.
7. A method for non-periodic scheduling through a Physical Downlink Control Channel (PDCCH) is characterized in that the processing of a base station side comprises the following steps:
the base station receives an uplink signaling from UE, judges whether the quality of the received uplink signaling meets the triggering condition of repeatedly sending a scheduling configuration signaling for scheduling the uplink signaling, if so, the base station repeatedly sends M scheduling configuration signaling in the same subframe through a Physical Downlink Control Channel (PDCCH), or the base station sends one scheduling configuration signaling in each subframe in N continuous subframes;
the triggering condition meeting the requirement of repeatedly sending the scheduling configuration signaling is as follows:
the intensity of the scheduled uplink signaling is lower than a preset signal intensity threshold;
the error rate of the scheduled uplink signaling exceeds a preset error rate threshold; or,
the times of repeatedly sending the same scheduling configuration signaling by the base station exceed the preset maximum times.
8. A system for aperiodic scheduling through a Physical Downlink Control Channel (PDCCH), the system comprising a base station and a User Equipment (UE),
the base station is used for issuing a scheduling configuration signaling to User Equipment (UE) through a Physical Downlink Control Channel (PDCCH), wherein the scheduling configuration signaling specifies the sending time of a scheduled uplink signaling; the base station is also used for detecting whether the scheduled uplink signaling from the UE is received or not at the sending time of the scheduled uplink signaling, if so, judging whether the quality of the received scheduled uplink signaling meets the triggering condition of repeatedly sending the scheduling configuration signaling or not, if so, repeatedly sending M scheduling configuration signaling in the same subframe through the PDCCH, or sending one scheduling configuration signaling in each subframe in N continuous subframes; otherwise, constructing a new scheduling configuration signaling and sending the signaling to the UE; if the scheduled uplink signaling from the UE is not received, the base station sends the same scheduling configuration signaling to the UE again through the PDCCH;
the UE is used for sending the scheduled uplink signaling at the sending time of the scheduled uplink signaling specified by the scheduling configuration signaling after receiving the scheduling configuration signaling;
the triggering condition meeting the requirement of repeatedly sending the scheduling configuration signaling is as follows:
the intensity of the scheduled uplink signaling is lower than a preset signal intensity threshold;
the error rate of the scheduled uplink signaling exceeds a preset error rate threshold; or,
the times of repeatedly sending the same scheduling configuration signaling by the base station exceed the preset maximum times.
9. The system of claim 8, wherein the base station is further configured to start a timer while issuing the scheduling configuration signaling to the UE through the PDCCH and the base station sending the same scheduling configuration signaling to the UE again through the PDCCH, and a duration of the timer is greater than or equal to a time difference between a sending time of the scheduled uplink signaling and a sending time of the scheduling configuration signaling;
the base station detects whether the scheduled uplink signaling from the UE is received at the sending time of the scheduled uplink signaling, and the detection is as follows: and the base station judges whether the scheduled uplink signaling from the UE is received before the timer is overtime.
10. The system according to claim 8, wherein the scheduling configuration signaling is measurement signaling indication signaling, channel quality indication dynamic configuration signaling or carrier aggregation dynamic activation configuration signaling.
11. A system for aperiodic scheduling through a Physical Downlink Control Channel (PDCCH), the system comprising a base station and a User Equipment (UE),
the base station is used for issuing a scheduling configuration signaling to the UE through the PDCCH, and the scheduling configuration signaling specifies the sending time of the scheduled uplink signaling; and the base station is used for judging whether the next subframe for sending the scheduling configuration signaling receives an acknowledgement message ACK from the UE, if so, judging whether the quality of the received scheduled uplink signaling meets the triggering condition for repeatedly sending the scheduling configuration signaling, if so, the base station repeatedly sends M scheduling configuration signaling in the same subframe through the PDCCH, or the base station sends one scheduling configuration signaling in each subframe in N continuous subframes; otherwise, constructing a new scheduling configuration signaling and sending the signaling to the UE; if the ACK from the UE is not received, the base station sends the same scheduling configuration signaling to the UE again;
the UE is configured to: after receiving the scheduling configuration signaling, immediately sending a confirmation message ACK to the base station in the next subframe, and then sending the scheduled uplink signaling at the sending time of the scheduled uplink signaling specified by the scheduling configuration signaling;
the triggering condition meeting the requirement of repeatedly sending the scheduling configuration signaling is as follows:
the intensity of the scheduled uplink signaling is lower than a preset signal intensity threshold;
the error rate of the scheduled uplink signaling exceeds a preset error rate threshold; or,
the times of repeatedly sending the same scheduling configuration signaling by the base station exceed the preset maximum times.
12. A system for aperiodic scheduling through a Physical Downlink Control Channel (PDCCH), the system comprising a base station and a User Equipment (UE),
the base station is configured to: receiving an uplink signaling from UE, judging whether the quality of the received uplink signaling meets the triggering condition of repeatedly sending a scheduling configuration signaling for scheduling the uplink signaling, if so, repeatedly sending M scheduling configuration signaling in the same subframe through a Physical Downlink Control Channel (PDCCH), and sending one scheduling configuration signaling by each subframe in N continuous subframes by a base station;
the UE is used for sending a scheduled uplink signaling to the base station after receiving a scheduling configuration signaling from the base station;
the triggering condition meeting the requirement of repeatedly sending the scheduling configuration signaling is as follows:
the intensity of the scheduled uplink signaling is lower than a preset signal intensity threshold;
the error rate of the scheduled uplink signaling exceeds a preset error rate threshold; or,
the times of repeatedly sending the same scheduling configuration signaling by the base station exceed the preset maximum times.
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| CN103825686A (en) * | 2012-11-16 | 2014-05-28 | 联芯科技有限公司 | Device and method for configuring LTE terminal uplink retransmission scheduling |
| CN104811409B (en) * | 2014-01-26 | 2020-02-07 | 夏普株式会社 | Method, base station and user equipment for repeatedly transmitting physical downlink control channel |
| CN106255209B (en) * | 2016-02-04 | 2019-10-01 | 北京智谷睿拓技术服务有限公司 | Enhance method, user equipment, base station and the system of Reliability of Wireless Communication |
| CN107241754B (en) * | 2017-06-08 | 2021-03-30 | 上海无线通信研究中心 | Adaptive uplink reference signal transmission method and corresponding functional unit |
| CN110380832A (en) * | 2018-04-12 | 2019-10-25 | 普天信息技术有限公司 | Down control channel PDCCH method for sending information, prediction technique and its device |
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| CN101572917A (en) * | 2008-04-28 | 2009-11-04 | 华为技术有限公司 | Method, device and system for obligating process number |
| CN101616442A (en) * | 2008-06-23 | 2009-12-30 | 华为技术有限公司 | Method for transmitting uplink data, terminal installation |
| CN101795145A (en) * | 2010-02-08 | 2010-08-04 | 中兴通讯股份有限公司 | Sending method and system for measuring reference signals |
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| CN101572917A (en) * | 2008-04-28 | 2009-11-04 | 华为技术有限公司 | Method, device and system for obligating process number |
| CN101616442A (en) * | 2008-06-23 | 2009-12-30 | 华为技术有限公司 | Method for transmitting uplink data, terminal installation |
| CN101795145A (en) * | 2010-02-08 | 2010-08-04 | 中兴通讯股份有限公司 | Sending method and system for measuring reference signals |
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