WO2011160291A1 - User equipment, power saving method and system thereof - Google Patents

Abstract

The present invention discloses a power saving method of a user equipment (UE), wherein according to the received control signaling for monitoring Physical Downlink Control Channel (PDCCH) on an appointed component carrier (CC), the UE controls the PDCCH monitored on the corresponding CC; and according to the received control signaling for executing radio frequency retuning (RF retuning) on a appointed CC, the UE controls RF retuning on the corresponding CC. The present invention simultaneously discloses a user equipment and power saving system thereof, through the solution of the present invention, the power saving efficiency of the UE can be improved, and the unfavorable factors generated by scheduling intervals which are caused by RF retuning are greatly decreased when activating/deactivating CC.

Description

 Terminal and power saving method and system thereof

 The present invention relates to a power saving technology in the field of communications, and in particular, to a terminal and a power saving method and system thereof. Background technique

 Third Generation Partnership Projects (3GPP, Third Generation Partnership Projects) Long Term Evolution (LTE, Long Term Evolution) System from Evolved Universal Terrestrial Radio Access Network

(E-UTRAN, Evolved Universal Terrestrial Radio Access Network), user equipment (UE, User Equipment), and evolved packet core network (EPC). Wherein, the E-UTRAN is composed of an enhanced base station (eNB); the UE may also be referred to as a terminal; and the EPC includes a mobility management entity

(MME), Packet Data Network Gateway (P-GW), and Service Gateway (S-GW).

 In the LTE system, in order to save the battery/power consumption of the UE, the eNB may configure a discontinuous reception (DRX) function for the UE through radio resource control (RRC) to control the UE to monitor the physical downlink control channel (PDCCH). , Physical Downlink Control Channel ) activity or behavior. In the RRC connection state, if DRX is configured, the UE is allowed to continuously monitor the PDCCH; otherwise, the UE continuously monitors the PDCCH. During monitoring of the PDCCH, the UE may receive data according to resources allocated by PDCCH signaling or according to pre-configured resources on a physical downlink shared channel (PDSCH); or transmit data on a physical uplink shared channel (PUSCH). The RRC configures the timer and related parameters required for the DRX operation, including: a duration timer, a DRX inactivity timer, and a DRX retransmission timer, where the downlink hybrid automatic repeat request is dedicated except for receiving the broadcast control channel.

Outside the ( HARQ ) process, each downlink HARQ process is configured with one timer, a long DRX loop, and a DRX start offset value. Optionally, there are DRX short cycle timers and short DRX cycles. Each The downlink HARQ process is configured with a HARQ loopback time timer in addition to the downlink HARQ process dedicated to the broadcast control channel.

 To describe the DRX behavior of the UE, the concept of a PDCCH subframe is introduced. For a UE operating in a Frequency Divided Duplex (FDD) mode, a PDCCH subframe may represent any subframe; for a UE operating in Time Divided Duplex (TDD), a PDCCH subframe refers only to a downlink subframe. And special sub-frames containing DwPTS.

 The active time refers to the time when the UE listens to the PDCCH in the PDCCH subframe.

 The media access control competition resolution timer refers to the number of consecutive PDCCH subframes that the UE should monitor the PDCCH after the UE sends the message 3 (Msg3) of the random access procedure.

 The DRX cycle in the long DRX cycle, short DRX cycle described above refers to the periodic repetition of the duration with a possible inactivity time.

 The foregoing DRX inactivity timer defines the number of consecutive PDCCH subframes after the UE successfully decodes the PDCCH indicating that the UE's initial uplink (Uplink) or downlink (Downlink) user data transmission.

 The DRX retransmission timer described above defines the maximum number of consecutive PDCCH subframes when the UE starts to expect downlink retransmission.

 The above DRX short cycle timer defines the number of consecutive subframes in which the UE follows the short DRX cycle.

 The HARQ loopback time timer defines the minimum number of subframes before the UE expects downlink HARQ retransmission.

 The above duration timer defines the number of consecutive PDCCH subframes at the beginning of the DRX cycle.

The basic working principle of the existing LTE system DRX is: When the DRX cycle is configured, the active time of the UE includes: a duration timer, or a DRX inactivity timer, or a DRX retransmission timer, or a media access control competition. Solve the time when the timer is running; or in the physical uplink control The time when the scheduling request (SR, Scheduling Request) sent on the channel (PUCCH) is suspended (Pending), that is, the time when the UE sends the SR to wait for the uplink grant (UL Grant); or the corresponding HARQ buffer has data. The time at which the uplink grant may be allocated for the suspended HARQ retransmission; or the UE successfully receives the random access response message for the explicitly transmitted random access preamble, but has not received the PDCCH indicating that there is a cell radio network for the UE New transmission time of temporary identification (C-RNTI), etc.

 When DRX is configured, the UE performs the following operations in each subframe:

 If using a short DRX loop and satisfying [ ( SFN x 10 ) +subframe number] modulo ( shortDRX-Cycle ) = ( drxStartOffset ) modulo ( shortDRX-Cycle ), or if long DRX loop is used and [ [ SFN x 10 ) +subframe is satisfied Number] modulo ( longDRX-Cycle ) = drxStartOffset, then the duration timer is started periodically in the corresponding subframe, or it is called periodic DRX cycle. For TDD mode, the duration timer can be started in the uplink subframe. Wherein, SFN is the number of system frames in which the subframe is recorded; subframe number is the number of subframes; shortDRX-Cycle is a short DRX cycle; drxStartOffset is a DRX start offset; and longDRX-Cycle is a long DRX cycle;

 If the data in the soft buffer of the corresponding HARQ process is not successfully decoded, the DRX retransmission timer is started for the corresponding HARQ process;

 If the DRX command MAC CE is received, the duration timer is stopped; the DRX inactivity timer is stopped;

 If the DRX inactivity timer expires or the DRX command MAC is received in the subframe

CE: If a short DRX cycle is configured, start or restart the DRX short cycle timer, using a short DRX cycle; otherwise use a long DRX cycle;

 If the DRX short cycle timer times out in this subframe, a long DRX cycle is used.

During the active time, for the PDCCH subframe, except for the subframe operated for the half-duplex FDD UE and the subframe overlapping with the measurement gap, the UE also needs to perform the following operations: Listening to the PDCCH includes: if the PDCCH indicates downlink transmission or has a pre-configured downlink allocation in the subframe, starting a HARQ loopback time timer for the corresponding HARQ process; stopping the DRX retransmission timer for the corresponding HARQ process; if the PDCCH Initiating or restarting the DRX inactivity timer, indicating a new transmission on the downlink or uplink;

 Regardless of whether the UE is listening to the PDCCH, when receiving or transmitting HARQ feedback, the UE receives or transmits HARQ feedback.

In order to meet the growing demand for large-bandwidth, high-speed mobile access, 3GPP has initiated the LTE-A (Long-Term Evolution advanced) standard. Based on LTE, LTE-A uses a series of new technologies to expand the frequency domain and airspace to improve spectrum utilization and increase system capacity. The LTE system has a maximum transmission bandwidth of 20 MHz in the downlink and uplink, and LTE-A version 10 (Rel-10) system carrier aggregation (CA, Carrier Aggregation) has up to five component carriers in the downlink and/or uplink respectively (CC, Component Carrier) ) aggregated to support a maximum transmission bandwidth of 100 MHz, respectively, and the total configuration of UL CCs is less than or equal to the total configuration of DL CCs. Each CC corresponds to one HARQ entity and a transport channel. Each of the DL CCs has a separate PDCCH indicating resource allocation on the CC or resource allocation on other CCs, and is classified into a downlink resource allocation (DL assignment) or an uplink grant (UL grant). When the CC index (CIF) is configured, a 3-bit CIF on the PDCCH indicates component carrier identification information. The UE configures one downlink primary carrier (DL PCC, Downlink Primary CC) and one uplink primary carrier (UL PCC, Uplink Primary CC), and can configure 0 to 4 downlink secondary carriers (DL SCC, Downlink Secondary CC) and/or 0. ~4 uplink secondary carriers (UL SCC, Uplink Secondary CC). The DL PCC and the UL PCC form the primary serving cell (PCell) of the UE, and the PCell provides security and NAS mobility information, synchronization, access, system information, paging, etc., and the UE is randomly connected. Entry can only be done through PCell. The UL PCC is configured with PUCCH resources that transmit signaling such as HARQ ACK/NACK, SR, and Channel Quality Indicator (CQI). DL SCC and its associated UL The SCC constitutes a secondary serving cell (SCell). The SCell provides higher bandwidth and data throughput as the added radio resources, and the SCell may not include the UL SCC configuration. The UL PCC and DL PCC are associated by the information indicated by SIB2 (System Information Block 2), and the UL SCC and the DL SCC are associated by SIB2 or dedicated signaling such as information indicated by RRC signaling. The UE may reconfigure the DL PCC/UL PCC to the DL SCC/UL SCC through handover or RRC connection reconfiguration in the radio resource control connection state (RRC_CONNECTED) state; may also reconfigure the DL SCC/UL SCC For DL PCC/UL PCC. At any time, the UE in the RRC_CONNECTED state must maintain a configuration of one DL PCC and one UL PCC. From the perspective of UE power saving and CC management, the eNB can activate/deactivate a certain DL SCC through the MAC CE, and the DL PCC cannot be activated/deactivated. The UE does not monitor the PDCCH, does not receive the PDSCH, does not perform channel quality indication (CQI) related measurements, does not receive system information, supports mobility related measurements, turns off the baseband and/or radio part modules, and does not perform PDCCH on the DL SCC in the deactivated state. Perform the corresponding RF frequency adjustment. Whether the UL SCC needs to support the activation/deactivation function and the corresponding UE behavior, such as whether to stop the SRS transmission/PUSCH transmission on the corresponding UL SCC, etc., is currently under discussion in 3GPP.

In the DRX scheme of the LTE-A CA, the 3GPP adopts DRX (Common DRX) with the same or common component carrier, or UE-specific DRX as the basic scheme, that is, the DL PCC/DL SCC of all configured UEs use the same The DRX parameters, all active states of DL SCC and DL PCC follow the same active time and DRX cycle, where DL PCC and any DL SCC can activate/deactivate any DL SCC. Another DRX scheme that was discussed by 3GPP but not currently adopted is a component independent (CC independent) DRX scheme. In this solution, different CCs can be configured with the same or different DRX parameters. The DRX behavior can be performed independently on each CC. For example, the DRX inactivity timer and the DRX retransmission timer can be independently maintained, that is, different CCs can have different Activity time. However, in general, the DRX cycle and the start of the duration timer on different CCs can be consistent. In the existing scheme of activating/deactivating a DL SCC, the UE no longer monitors the PDCCH on the deactivated DL SCC, and turns off the corresponding baseband/RF part (RF chain); the UE turns on the corresponding baseband on the activated DL SCC. / radio section, and further PDCCH is not continuously monitored according to DRX behavior. Whether the UE is allowed to monitor the DRX behavior of the PDCCH on the activated/deactivated DL SCC and the operation of turning on/off the corresponding baseband/RF part is performed, and the operation is performed by the combination, that is, simultaneously, through an activation/deactivation Activate MAC CE control. Turning on/off the corresponding RF chain operation requires adjusting the frequency of the bandwidth supported by the UE accordingly. The RF chain corresponding to the on/off/adjustment may be referred to as RF retiming; or RF retiming may also be referred to only. / Turn off the radio section and associate the on/off baseband section with the PDCCH snooping behavior in DRX. RF retiming may result in a scheduling gap of about 2 milliseconds (ms) for DL PCC/DL SCC on the same RF chain, in which downlink assignment/uplink grant signaling cannot be sent on the PDCCH, the UE is in the relevant DL PCC/ The DL SCC cannot perform data transmission/reception, and may also affect its associated UL PCC/UL SCC.

 Similarly, activating/deactivating UL SCC can save power and reduce uplink interference, as well as RF retiming operations. If the activation/deactivation operation is very frequent, the complexity of UE processing and eNB scheduling will be greatly increased; conversely, if the adverse effects caused by the scheduling gap caused by the activation/deactivation operation are reduced or eliminated, it may be necessary to reduce activation/de- The frequency of activation of the operation will have a great impact on the necessity of the activation/deactivation function, which is not conducive to the power saving of the UE. Summary of the invention

 In view of this, the main object of the present invention is to provide a terminal and a power saving method and system thereof, which can improve the power saving efficiency of the UE and greatly reduce the disadvantages caused by the scheduling gap caused by RF retiming when the CC is activated/deactivated.

 In order to achieve the above object, the technical solution of the present invention is achieved as follows:

 The invention provides a power saving method for a terminal, the method comprising:

The UE controls the corresponding CC according to the received control signaling for monitoring the PDCCH on the designated CC. The upper monitoring PDCCH is controlled; and according to the received control signaling for performing RF retiming on the designated CC, the RF retiming on the corresponding CC is controlled.

 In the above solution, before the UE receives the control signaling for monitoring the PDCCH on the designated CC and receives the control signaling for performing RF retiming on the designated CC, the method further includes: the eNB is listening on the CC according to the predetermined UE. The PDCCH and the decoupling manner of the behavior of performing RF retiming, send corresponding control signaling to the UE.

 In the above solution, the decoupling mode includes: controlling, by two independent dedicated signaling, the behavior of the UE monitoring the PDCCH and performing RF retiming on the CC;

 Or, the DRX cmd MAC CE is used to control a single CC to enter the DRX inactivity time, and the corresponding RF retiming operation is triggered by the RRC reconfiguration signaling.

 Or, all the CCs are controlled to enter the DRX inactivity time by using the DRX cmd MAC CE, and the corresponding RF retiming operation is triggered by the RRC reconfiguration signaling.

 In the above solution, when the de-coupling mode is used to control the behavior of the UE to monitor the PDCCH and perform RF retiming on the relevant CC by using two independent dedicated signalings, the UE sends the corresponding to the UE for the activation/deactivation of the DL SCC. The control signaling is specifically: the eNB sends the first control signaling to the UE, where the first control signaling includes: controlling the UE to monitor the PDCCH enable/disable information on the designated DL SCC; the eNB sends the second control message to the UE. The second control signaling includes information about the RF retiming of the RF chain where the specified DL SCC is located.

 In the above solution, the decoupling mode is to control a single CC to enter the DRX inactivity time by using the DRX cmd MAC CE, and when the corresponding RF retiming operation is triggered by the RRC reconfiguration signaling, for the DL SCC, the corresponding control is sent to the UE. The signaling is specifically: the eNB sends a DRX cmd MAC CE to the UE, specifies a DL SCC in the DRX cmd MAC CE, and instructs the UE to stop monitoring the PDCCH for the DL SCC to enter the DRX inactivity time; the eNB also sends an RRC reconfiguration to the UE. Signaling.

In the above solution, the decoupling mode is to control all CCs by using DRX cmd MAC CE. When the RRC reconfiguration is triggered to perform the corresponding RF retiming operation, the sending the corresponding control signaling to the UE is specifically: the eNB sends the DRX cmd MAC CE to the UE, and indicates to the DRX cmd MAC CE The DL SCC stops listening to the PDCCH and enters the DRX inactivity time; the eNB also sends RRC reconfiguration signaling to the UE.

 The invention provides a power saving system for a terminal, the system comprising:

 The UE is configured to control, according to the received control signaling for monitoring the PDCCH on the designated CC, the monitoring PDCCH on the corresponding CC, and according to the received control signaling for performing RF retiming on the designated CC, on the corresponding CC. The RF retiming is controlled.

 In the above solution, the system further comprises:

 The eNB is configured to send corresponding control signaling to the UE according to a decoupling manner in which the predetermined UE monitors the PDCCH and performs RF retiming on the CC.

 In the foregoing solution, the UE includes: a signaling receiving module, and a signaling processing module, where the signaling receiving module is configured to receive, by the eNB, the control signaling sent by the eNB to monitor the PDCCH on the designated CC according to the decoupling manner, and the designated CC. Performing RF retiming control signaling, and notifying the signaling signaling module of the control signaling;

 The signaling processing module is configured to separately control the monitoring PDCCH and the RF retiming on the corresponding CC according to the control signaling.

 The invention provides a power saving method for a terminal, the method comprising:

 The UE performs the enabling/disabling monitoring PDCCH and RF retiming on the CC designated by the eNB according to a predetermined decoupling manner of monitoring the PDCCH and performing RF retiming on the CC.

In the above solution, the decoupling mode includes: after receiving the activation/deactivation of the MAC CE, the UE selects an enable/disable time to monitor the PDCCH and perform RF retiming; or the UE activates/deactivates the MAC CE according to the received The PDCCH snooping behavior is enabled/disabled, and the corresponding RF retiming operation is triggered by the received RRC reconfiguration signaling. A terminal provided by the present invention includes: a first control module and a second control module; wherein, the first control module is configured to perform decoupling according to a predetermined behavior of monitoring a PDCCH and performing RF retiming on a CC, Enable/disable the monitoring of the PDCCH on the CC specified by the eNB;

 And a second control module, configured to perform RF retiming on the CC designated by the eNB according to a predetermined decoupling manner of monitoring the PDCCH and performing RF retiming on the CC.

 In the above solution, the decoupling mode includes: after receiving the activation/deactivation of the MAC CE, the first control module and the second control module respectively enable/disable the monitoring of the PDCCH and the RF according to a preset timing. Retiming;

 Alternatively, the first control module enables/disables according to the received activation/deactivation MAC CE

The PDCCH monitoring behavior, the second control module triggers the corresponding RF retiming operation by receiving the RRC reconfiguration signaling.

 The terminal provided by the present invention and the power saving method and system thereof, the UE controls the monitoring PDCCH on the corresponding CC according to the received control signaling for monitoring the PDCCH on the designated CC; and performs RF on the designated CC according to the received The retiming control signaling controls the RF retiming on the corresponding CC; thus, the power saving efficiency of the UE can be improved, and the disadvantage caused by the scheduling gap caused by RF retiming when the CC is activated/deactivated is greatly reduced. DRAWINGS

 1 is a schematic flowchart of a power saving method for implementing a terminal according to the present invention;

 2 is a schematic structural diagram of a power saving system for implementing a terminal according to the present invention;

 FIG. 3 is a schematic flowchart diagram of another method for implementing power saving of a terminal according to the present invention; FIG.

 FIG. 4 is a schematic structural diagram of a terminal implemented by the present invention. detailed description

The basic idea of the present invention is: The UE monitors the PDCCH on the designated CC according to the received The control signaling controls the monitoring PDCCH on the corresponding CC; and controls the RF retiming on the corresponding CC according to the received control signaling for performing RF retiming on the designated CC; further, the UE receives the Before the control signaling for monitoring the PDCCH on the CC and the receiving the control signaling for RF retiming on the designated CC, the method includes: decoupling the eNB according to the predetermined behavior of the UE monitoring the PDCCH and performing RF retiming on the CC. Send corresponding control signaling to the UE.

 The invention will be further described in detail below with reference to the drawings and specific embodiments.

 The present invention implements a power saving method for a terminal. As shown in FIG. 1 , the method includes the following steps: Step 101: The eNB performs a decoupling manner of controlling a behavior of a UE monitoring a PDCCH and performing RF retiming on a CC according to a predetermined manner. The UE sends corresponding control signaling;

 Here, the decoupling mode includes: controlling, by two independent dedicated signaling, a behavior of the UE monitoring the PDCCH and performing RF retiming on the CC; or controlling a single CC to enter the DRX inactivity time by using the DRX cmd MAC CE, The configuration signaling triggers the corresponding RF retiming operation; or the DRX cmd MAC CE controls all CCs to enter the DRX inactivity time, and triggers the corresponding RF retiming operation through the RRC reconfiguration signaling;

 When the CC is a DL SCC, the monitoring of the PDCCH and the RF retiming on the CC means: monitoring the PDCCH and performing RF retiming on the DL SCC; and when the CC is a UL SCC, the listening on the CC The PDCCH is: the PDCCH is monitored on the associated DL SCC of the UL SCC. The RF retiming on the CC refers to: performing on the RF chain of the UL SCC and/or the associated DL SCC of the UL SCC. RF retiming.

 Step 102: The UE controls the monitoring PDCCH and the RF retiming on the corresponding CC according to the received control signaling.

Specifically, the UE controls the monitoring PDCCH on the corresponding CC according to the received control signaling for monitoring the PDCCH on the designated CC; and, according to the received control signaling for performing RF retiming on the designated CC, the corresponding CC The RF retiming on the control. In order to implement the above method, the present invention further provides a power saving system for a terminal. As shown in FIG. 2, the system includes:

 The UE 22 is configured to control, according to the received control signaling that the PDCCH is monitored on the designated CC, the monitoring PDCCH on the corresponding CC, and according to the received control signaling for performing RF retiming on the designated CC, to the corresponding CC. RF retiming on the control;

 The system further includes: an eNB 21, configured to send corresponding control signaling to the UE 22 according to a predetermined decoupling manner in which the UE 22 monitors the PDCCH and performs RF retiming on the CC.

 The UE 22 includes: a signaling receiving module 221, and a signaling processing module 222. The signaling receiving module 221 is configured to receive, by the eNB 21, the control signaling sent by the eNB 21 to monitor the PDCCH on the designated CC according to the decoupling manner. Performing RF retiming control signaling on the CC, and notifying the control signaling to the signaling processing module 222;

 The signaling processing module 222 is configured to separately control the monitoring PDCCH and the RF retiming on the corresponding CC according to the control signaling.

 The method of the present invention will be further described in detail below by way of specific examples.

 Embodiment 1:

 In this embodiment, the main idea of the terminal power saving method is: separating the UE behavior involved in the existing activation/deactivation MAC CE, and separating and controlling the PDCCH listening behavior and the RF retiming behavior, using Two separate dedicated signalings are performed separately; specifically:

 When the DL SCC is activated/deactivated, the following steps are included:

 Step 11: The eNB sends the first control signaling to the UE, where the first control signaling includes: controlling, by the UE, the enable/disable information of the PDCCH on the designated DL SCC; further, the A control signaling further includes indication information for controlling whether the UE performs the CQI measurement on the designated DL SCC;

Further, the first control signaling is RRC signaling, or MAC CE signaling, or PDCCH. Signaling

 Further, the first control signaling may include enabling and/or disabling information of the monitoring PDCCH of 0 to multiple DL SCCs, for example, a bitmap may be used, and a corresponding bit is 1 to enable, 0 indicates de-enable, or vice versa; if the bit of a DL SCC in the first control signaling received by the UE is the same as the value received last time, indicating that the state of the DL SCC is unchanged, otherwise, the representation and the upper The opposite state.

 Step 12: The eNB sends second control signaling to the UE, where the second control signaling includes information about RF retiming of the RF chain where the specified DL SCC is located.

 Here, the information of the RF retiming includes: information for turning on/off/adjusting the frequency point; for the information of turning on/off/adjusting the frequency point, the information type 1 can be set to indicate that the UE increases the bandwidth, and needs to be wider. Adjusting the RF frequency range in the frequency band; setting information type 2 indicates that the UE reduces the bandwidth, and needs to adjust the RF frequency point to a narrower frequency band;

 Further, the second control signaling may include RF retiming information of the RF chain where the DL SCC is located, for example: a bitmap may be used, the corresponding bit is 1 for the information type 1, and 0 is for the information. Type 2, or a corresponding bit of 0, indicates the information type 1 and a value of 1 indicates the information type 2.

 Step 13: The UE receives the first control signaling, and enables/disables the UE to monitor the PDCCH on the corresponding DL SCC.

 Specifically, if the UE receives the first control signaling to enable the PDCCH to be monitored on the corresponding DL SCC, the UE determines, according to the DRX rule, whether to monitor the PDCCH on the corresponding DL SCC; if the first control signaling is received, If the UE is not enabled to monitor the PDCCH on the corresponding DL SCC, the UE does not monitor the PDCCH on the corresponding DL SCC, and the UE does not monitor the PDCCH on the corresponding DL SCC even if the UE is in active time on other active DL SCCs;

Further, the UE performs or does not perform CQI measurement on the corresponding DL SCC according to the first control signaling or the indication information of the CQI measurement. Step 14: The UE receives the second control signaling, and performs RF retiming on the RF chain where the corresponding DL SCC is located.

 Further, in this embodiment, the eNB determines, according to the DRX behavior or the HARQ operation status of the UE on the corresponding DL SCC, the timing of sending the first control signaling, for example, when there is no HARQ retransmission on a certain DL SCC or temporarily does not need to be scheduled. The UE may stop the behavior of monitoring the PDCCH on the DL SCC by sending the first control signaling, thereby achieving the purpose of saving power of the UE;

 Further, in this embodiment, the eNB determines the timing of sending the second control signaling according to the DRX behavior or the HARQ operation condition of the UE on the corresponding DL SCC, for example: when there is no HARQ operation on all DL SCCs located on the same RF chain. Or, if it is not required to be scheduled temporarily, it is determined that the RF retiming does not cause the scheduling interruption even if the scheduling gap is generated, and the UE may perform the corresponding RF retiming operation by sending the second control signaling, thereby further achieving the power saving of the UE. Purpose

 Further, in this embodiment, after the eNB sends a first control signaling according to the actual scheduling situation of the UE, the eNB sends the second control signaling; or the eNB sends the second control signaling after sending the multiple first control signaling. ;

 Further, in this embodiment, the eNB sends the first control signaling to enable/disable the PDCCH behavior of all DL SCCs on the same RF chain according to the actual scheduling situation of the UE, and the DL SCC is enabled or disabled. Monitor PDCCH behavior;

 Further, in this embodiment, the eNB sends the second control signaling to control the RF retiming behavior of an RF chain according to the actual scheduling situation of the UE. When there are multiple DL SCCs on the RFchain, the DL SCCs perform RF in a consistent direction. Retiming behavior;

In this embodiment, the first control signaling including enabling the PDCCH monitoring on the specified DL SCC may be earlier than the second control signaling corresponding to the RF retiming, and including the first control of enabling the PDCCH monitoring on the designated DL SCC. The signaling is generally sent simultaneously with the second control signaling corresponding to the RF retiming, for example, two MAC CEs included in the same MAC PDU; or The second control signaling is sent first, because if the RF retiming operation is not performed, the performance of monitoring the PDCCH behavior may be deteriorated or cannot be performed;

 For the first control signaling including the PDCCH monitoring on the DL SCC, the foregoing steps 12 and 13 are not in the order of the preceding control; and for the first control signaling including the PDCCH monitoring on the specified DL SCC, the foregoing step 12 should be Before step 13.

 And / or, when activated/deactivated for UL SCC, the following steps are included:

 Step 21: The eNB sends a third control signaling to the UE, where the third control signaling includes the UE monitoring the PDCCH enable and/or de-enabled information on the associated DL SCC of the designated UL SCC. Step 22: The eNB sends the UE to the UE. Transmitting fourth control signaling, where the fourth control signaling includes information about RF retiming of the RF chain of the specified UL SCC and/or the associated DL SCC of the UL SCC;

 Step 23: The UE receives the third control signaling, and enables/disables the UE to monitor the PDCCH on the associated DL SCC of the corresponding UL SCC.

 Step 24: The UE receives the fourth control signaling, and performs RF retiming on the RF chain where the corresponding UL SCC is located and/or its associated DL SCC.

 The above specific process for the activation/deactivation of the UL SCC is similar to the activation/deactivation of the DL SCC, and will not be described again here.

 The foregoing step 22 and step 23 are not in the order of the third control signaling including the PDCCH snooping on the associated DL SCC that is configured to enable the specified UL SCC; and the PDCCH is monitored on the associated DL SCC including the specified UL SCC. For the third control signaling, the above step 22 should be before step 23.

 Embodiment 2:

In this embodiment, the main idea of the terminal power saving method is: deleting the existing activated/deactivated MAC CE and the UE behavior involved, including: enabling/disabling PDCCH monitoring/CQI measurement behavior and performing RF retiming behavior Control single DL SCC entry with DRX cmd MAC CE DRX inactivity time.

 For the Common DRX scheme, the DRX Duration Timer and/or DRX Inactivity Timer are not stopped. For the DL SCC independent DRX scheme, the duration timer and/or DRX inactivity timer maintained on the corresponding DL SCC is stopped within one DRX cycle. The eNB may send the DRX cmd MAC CE to enable the corresponding DL SCC to enter the DRX inactivity time after each duration timer is started, thereby enabling/disabling the UE to monitor the PDCCH in the corresponding DL SCC. The signaling overhead is large. The eNB configures/deconfigures the DL SCC through RRC reconfiguration signaling, and the UE receives the RRC reconfiguration signaling to perform DL SCC configuration/deconfiguration, and performs corresponding RF retiming, without affecting normal scheduling behavior.

 The power saving method of the terminal in this example specifically includes the following steps:

 Step 31: The eNB sends a DRX cmd MAC CE to the UE, specifies a DL SCC in the DRX cmd MAC CE, and instructs the UE to stop listening to the PDCCH for the DL SCC, and enters the DRX inactivity time.

 Here, the instructing the UE to stop monitoring the PDCCH for the DL SCC is generally: by not carrying the CIF in the DRX cmd MAC CE, indicating that the DL SCC needs to stop monitoring the PDCCH and enter the DRX inactivity time; or, by using the DRX cmd The CIF carries the CIF, indicating that the DL SCC needs to stop monitoring the PDCCH and enter the DRX inactivity time.

 Further, the eNB decides to send the DRX cmd MAC CE according to the HARQ operation status and the DRX behavior on the specified DL SCC. For example, when there is no scheduling behavior on the designated DL SCC or no HARQ retransmission, the DRX cmd MAC CE is sent.

 Step 32: The eNB sends RRC reconfiguration signaling to the UE, and notifies the UE to configure/deconfigure the specified DL SCC.

Step 33: After receiving the DRX cmd MAC CE, the UE stops monitoring the PDCCH on the corresponding DL SCC according to the indication in the DRX cmd MAC CE, and enters the DRX inactivity time. Step 34: The UE receives the RRC reconfiguration signaling, according to Notification configuration/deconfiguration specified DL SCC, perform corresponding configuration or configure DL SCC operation, and perform RF retiming on the RF chain where the corresponding DL SCC is located.

 The foregoing step 32 and step 33 are not in the order, and the eNB sends the RRC reconfiguration signaling, which may be at the same time or after the UE receives the DRX cmd MAC CE.

 Embodiment 3:

 In this embodiment, the main idea of the terminal power saving method is: deleting the existing activated/deactivated MAC CE and the UE behavior involved, including enabling/disabling the PDCCH monitoring/CQI measurement behavior and performing RF retiming behavior. Use the DRX cmd MAC CE to control all DL SCCs into DRX inactivity time. This scheme has certain restrictions on the timing at which the eNB sends the DRX cmd MAC CE. It needs to be considered without affecting normal HARQ operations. This solution is applicable to the Common DRX solution and also to the DL SCC independent DRX solution.

 The terminal power saving method of this example specifically includes the following steps:

 Step 41: The eNB sends a DRX cmd MAC CE to the UE, and in the DRX cmd MAC CE, indicates that all DL SCCs stop listening to the PDCCH and enter the DRX inactivity time.

 Here, the indication that all DL SCCs stop monitoring the PDCCH is generally: by not carrying the CIF in the DRX cmd MAC CE, indicating that all DL SCCs need to stop monitoring the PDCCH and enter the DRX inactivity time; or, by using the DRX cmd MAC CE Carrying the CIF, indicating that all DL SCCs need to stop monitoring the PDCCH and enter the DRX inactivity time;

 Further, the eNB decides to send the DRX cmd MAC CE according to the HARQ operation status and the DRX behavior on all DL SCCs, for example, when there is no scheduling behavior on all DL SCCs or no HARQ retransmissions, the DRX cmd MAC CE is sent.

 Step 42: The eNB sends RRC reconfiguration signaling to the UE, and notifies the UE to configure/deconfigure the specified DL SCC.

Step 43: After receiving the DRX cmd MAC CE, the UE stops monitoring the PDCCH on all DL SCCs according to the indication in the DRX cmd MAC CE, and all the DL SCCs enter the DRX. Inactivity time;

 Here, the UE receiving the DRX cmd MAC CE may receive the DRX cmd MAC CE on the DL PCC or the DL SCC at the DRX active time.

 Step 44: The UE receives the RRC reconfiguration signaling, performs configuration or de-configuration of the DL SCC operation according to the configuration/de-configuration of the specified DL SCC, and performs RF retiming on the RF chain where the corresponding DL SCC is located.

 The foregoing step 42 and step 43 are not in the order, and the eNB sends the RRC reconfiguration signaling, which may be at the same time or after the UE receives the DRX cmd MAC CE.

 The present invention also provides a power saving method for a terminal. As shown in FIG. 3, the method includes the following steps:

 Step 301: The UE receives an activation/deactivation MAC CE sent by the eNB.

 Further, the UE receives the RRC reconfiguration signaling sent by the eNB.

 Step 302: The UE enables/disables the monitoring of the PDCCH and performs RF retiming on the CC designated by the eNB according to a predetermined de-coupling manner of monitoring the PDCCH and the RF retiming behavior on the CC.

 Here, the decoupling mode includes: after receiving the activation/deactivation of the MAC CE, the UE selects the timing of enabling/disabling the monitoring of the PDCCH and performing RF retiming; or the UE is enabled according to the received activation/deactivation MAC CE. / De-enable PDCCH listening behavior, triggering the corresponding RF retiming operation through the received RRC reconfiguration signaling;

 When the CC is a DL SCC, the monitoring of the PDCCH and the RF retiming on the CC means: monitoring the PDCCH and performing RF retiming on the DL SCC; and when the CC is a UL SCC, the listening on the CC The PDCCH is: the PDCCH is monitored on the associated DL SCC of the UL SCC. The RF retiming on the CC refers to: performing on the RF chain of the UL SCC and/or the associated DL SCC of the UL SCC. RF retiming.

Two embodiments corresponding to the method shown in FIG. 3 are specifically described as follows: Embodiment 4:

 In this embodiment, the main idea of the terminal power saving method is: still use existing activation/deactivation

MAC CE, but the UE chooses to enable/disable the timing of monitoring the PDCCH and performing RF retiming; specifically:

 When the DL SCC is activated/deactivated, the following steps are included:

 Step 51: The eNB sends an activation/deactivation MAC CE.

 Step 52: The UE enables/disables to monitor the PDCCH on the corresponding DL SCC according to the activation/deactivation of the MAC CE.

 Specifically, if the activation/deactivation MAC CE received by the UE includes the activation information of the specified DL SCC, the UE enables the behavior of monitoring the PDCCH on the corresponding DL SCC, that is, determining whether to be on the corresponding DL SCC according to the DRX rule. Listening to the PDCCH;

 If the activation/deactivation MAC CE received by the UE includes the deactivation information of the specified DL SCC, the UE disables the behavior of monitoring the PDCCH on the corresponding DL SCC, that is, does not monitor the PDCCH on the corresponding DL SCC, even if the UE It is active at other active DL SCCs and does not monitor the PDCCH on the corresponding DL SCC.

 Step 53: The UE selects an RF retiming timing of the RF chain where the corresponding DL SCC is located according to the HARQ operation and/or the DRX behavior on the corresponding DL SCC, and performs RF retiming;

 Specifically, if all the DL SCCs located on the same RF chain do not have HARQ operations or do not need to be scheduled temporarily, the UE determines to perform RF retiming on the corresponding DL SCC, and even if a scheduling gap is generated, the scheduling is not interrupted, and the UE performs Corresponding RF retiming;

Or, after the UE performs the PDCCH monitoring behavior once, the corresponding RF retiming operation is performed once, and the two behaviors are used as the 1:1 correspondence; or the UE is enabled/disabled multiple times. After the PDCCH is monitored, the RF retiming operation is performed once. The corresponding proportional relationship can be fixed or not fixed. Or, after the UE enters the DRX inactivity time, perform a corresponding RF retiming operation; in this case, the UE may have enabled/disabled PDCCH monitoring one or more times according to the activation/deactivation of the MAC CE. That is, the corresponding proportional relationship between the two behaviors is non-fixed.

 In this embodiment, the behavior of the UE to enable PDCCH snooping on the corresponding DL SCC may be earlier than the behavior of the corresponding RF retiming; and the behavior of the UE performing PDCCH snooping on the corresponding DL SCC is generally performed simultaneously with the corresponding RF retiming behavior. Or the latter can be performed first, because if the latter operation is not performed, the performance of the former to monitor the PDCCH behavior is deteriorated or cannot be performed.

 And / or, when activated/deactivated for UL SCC, the following steps are included:

 Step 61: The eNB sends an activation/deactivation MAC CE.

 Step 62: Enable/disable the monitoring of the PDCCH on the associated DL SCC of the corresponding UL SCC according to receiving the activation/deactivation MAC CE;

 Here, the enabling/disabling of the PDCCH on the associated DL SCC of the corresponding UL SCC is generally: turning on/off the behavior of the SRS/PUSCH transmission by the UE on the associated DL SCC of the corresponding UL SCC.

 Step 63: The UE performs an RF retiming timing according to the HARQ operation and/or the DRX behavior on the corresponding UL SCC, and performs RF retiming;

 The above specific process for the activation/deactivation of the UL SCC is similar to the activation/deactivation of the DL SCC, and will not be described again here.

 Embodiment 5:

In this embodiment, the main idea of the power saving method of the terminal is: the existing active/deactivated MAC CE is still used, but the UE enables/disables the PDCCH monitoring behavior according to the received activation/deactivation MAC CE, and receives the PDCCH monitoring behavior. The RRC reconfiguration signaling triggers a corresponding RF retiming operation; specifically includes the following steps: Step 71: The eNB sends an activation/deactivation MAC CE.

 Step 72: The eNB sends RRC reconfiguration signaling to the UE, and notifies the UE to configure/deconfigure the designated CC.

 Further, the eNB determines the timing of transmitting the RRC reconfiguration signaling according to information such as coverage/load balancing/CC management/CC RRM/CQI measurement.

 Step 73: The UE enables/disables to monitor the PDCCH on the corresponding CC according to the received activation/deactivation MAC CE.

 Specifically, if the activation/deactivation MAC CE received by the UE includes the activation information of the designated CC, the UE enables the behavior of monitoring the PDCCH on the corresponding CC, that is, whether to monitor the PDCCH on the corresponding CC according to the DRX rule, if The activation/deactivation MAC CE received by the UE includes the deactivation information of the designated CC, and the UE disables the behavior of monitoring the PDCCH on the corresponding CC, that is, does not monitor the PDCCH on the corresponding CC, even if the UE is in other active state. The CC is located at the active time, and does not monitor the PDCCH on the corresponding CC;

 Further, the UE sets a corresponding state variable for the corresponding CC, for example, setting the value of the state variable to 1, indicating that the value of the state variable is set to 0, indicating that it is disabled; or, setting the value of the state variable to 0, Indicates that the value of the state variable is set to 1 to indicate that it is disabled. The UE determines whether to monitor the PDCCH according to the DRX behavior according to the value of the state variable corresponding to each CC.

 Step 74: The UE receives the RRC reconfiguration signaling, performs configuration or de-configuration of the CC according to the configuration/de-configuration of the specified CC, and performs RF retiming on the RF chain where the corresponding CC is located.

 In the foregoing solution, the step 72 and the step 73 are not in the order of the MAC CE including the PDCCH monitoring on the designated CC. The step 72 should be before the step 73 for the MAC CE including the PDCCH monitoring on the designated CC. .

In order to implement the above method, the present invention further provides a terminal. As shown in FIG. 4, the terminal includes: a first control module 41 and a second control module 42; The first control module 41 is configured to enable/disable the monitoring of the PDCCH on the CC designated by the eNB according to a predetermined decoupling manner of monitoring the PDCCH and performing RF retiming on the CC;

 The second control module 42 is configured to perform RF retiming on the CC designated by the eNB according to a predetermined de-coupling manner of monitoring the PDCCH and performing RF retiming on the CC. Here, the decoupling manner includes: receiving, by the UE, the UE After the MAC CE is activated/deactivated, the first control module 41 and the second control module 42 respectively perform enable/disable monitoring PDCCH and RF retiming according to a preset timing;

 Or the first control module 41 enables/disables the PDCCH listening behavior according to the received activation/deactivation MAC CE, and the second control module 42 triggers the corresponding RF retiming operation by receiving the RRC reconfiguration signaling;

 终端The above two decoupling modes can improve the power saving efficiency and greatly reduce the disadvantages caused by the RF retiming scheduling gap when activating/deactivating DL SCC and/or UL SCC.

 The above description is only for the preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included. Within the scope of protection of the present invention.

Claims

Claim  A power saving method for a terminal, the method comprising:  The terminal (UE) controls the monitoring PDCCH on the corresponding CC according to the received control signaling for monitoring the physical downlink control channel (PDCCH) on the designated component carrier (CC); and performs radio frequency on the designated CC according to the received RF retiming control signaling controls RF retiming on the corresponding CC.  2. The power saving method according to claim 1, wherein the method is: before the UE receives control signaling for monitoring a PDCCH on a designated CC and receives control signaling for performing RF retiming on a designated CC, the method The method further includes: the enhanced base station (eNB) sends corresponding control signaling to the UE according to a predetermined decoupling manner in which the UE monitors the PDCCH and performs RF retiming on the CC.  The power saving method according to claim 2, wherein the decoupling method comprises: separately controlling, by two independent dedicated signaling, a behavior of the UE monitoring the PDCCH and performing RF retiming on the CC;  Or, the DRX cmd MAC CE is used to control a single CC to enter the DRX inactivity time, and the corresponding RF retiming operation is triggered by the RRC reconfiguration signaling.  Or, all the CCs are controlled to enter the DRX inactivity time by using the DRX cmd MAC CE, and the corresponding RF retiming operation is triggered by the RRC reconfiguration signaling. The power saving method according to claim 3, wherein the decoupling mode is to control, when the UE monitors the PDCCH and performs RF retiming on the relevant CC by using two independent dedicated signaling, respectively, for the DL For the activation/deactivation of the SCC, the sending the corresponding control signaling to the UE is specifically: the eNB sends the first control signaling to the UE, where the first control signaling includes controlling the UE to monitor the PDCCH on the designated DL SCC/ Deactivating information; The eNB sends second control signaling to the UE, the second control signaling including information about RF retiming of the RF chain where the specified DL SCC is located. The power saving method according to claim 3, wherein the decoupling mode is to control a single CC to enter a DRX inactivity time by using a DRX cmd MAC CE, and trigger an RF retiming operation by using RRC reconfiguration signaling. For the DL SCC, the sending the corresponding control signaling to the UE is specifically: the eNB sends a DRX cmd MAC CE to the UE, specifies a DL SCC in the DRX cmd MAC CE, and instructs the UE to stop monitoring the PDCCH for the DL SCC, and enters DRX inactivity time; The eNB also sends RRC reconfiguration signaling to the UE.  The power saving method according to claim 3, wherein the decoupling mode is to control all CCs to enter a DRX inactivity time by using a DRX cmd MAC CE, and trigger the corresponding RF retiming operation by using RRC reconfiguration signaling. The transmitting the corresponding control signaling to the UE is specifically: the eNB sends a DRX cmd MAC CE to the UE, in the DRX cmd MAC CE, indicates that all DL SCCs stop monitoring the PDCCH, and enter a DRX inactivity time; the eNB also sends an RRC to the UE. Reconfiguration signaling.  7. A power saving system for a terminal, characterized in that the system comprises:  The UE is configured to control, according to the received control signaling for monitoring the PDCCH on the designated CC, the monitoring PDCCH on the corresponding CC, and according to the received control signaling for performing RF retiming on the designated CC, on the corresponding CC. The RF retiming is controlled.  The power saving system according to claim 7, wherein the system further comprises: an eNB, configured to send, according to a predetermined de-coupling manner that the UE monitors the PDCCH and performs RF retiming on the CC, to send to the UE. Corresponding control signaling.  The power saving system according to claim 8, wherein the UE comprises: a signaling receiving module and a signaling processing module;  a signaling receiving module, configured to receive, by the eNB, control signaling for monitoring the PDCCH on the designated CC according to the decoupling manner, and control signaling for performing RF retiming on the designated CC, and notify the signaling processing module of the control signaling ; a signaling processing module, configured to monitor a PDCCH on a corresponding CC according to the control signaling Control with RF retiming separately.  10. A power saving method for a terminal, the method comprising:  The UE performs the enabling/disabling monitoring PDCCH and RF retiming on the CC designated by the eNB according to a predetermined decoupling manner of monitoring the PDCCH and performing RF retiming on the CC.  The power saving method according to claim 10, wherein the decoupling mode comprises: after the UE receives the activation/deactivation of the MAC CE, selects an opportunity to enable/disable the PDCCH and perform RF retiming. Or the UE enables/disables the PDCCH listening behavior according to the received activation/deactivation MAC CE, and triggers the corresponding RF retiming operation by using the received RRC reconfiguration signaling.  A terminal, comprising: a first control module and a second control module; wherein  a first control module, configured to enable/disable the monitoring of the PDCCH on the CC designated by the eNB according to a predetermined decoupling manner of monitoring the PDCCH and performing RF retiming on the CC;  And a second control module, configured to perform RF retiming on the CC designated by the eNB according to a predetermined decoupling manner of monitoring the PDCCH and performing RF retiming on the CC.  The terminal according to claim 12, wherein the decoupling mode comprises: after the UE receives the activation/deactivation MAC CE, the first control module and the second control module respectively follow the preset timing, respectively Enable/disable enable PDCCH and RF retiming;  Alternatively, the first control module enables/disables the PDCCH listening behavior according to the received activation/deactivation MAC CE, and the second control module triggers the corresponding RF retiming operation by receiving the RRC reconfiguration signaling.