CN103889039A - Power saving method based on discontinuous receiving function and device - Google Patents
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Abstract
An embodiment of the invention provides a power saving method based on a discontinuous receiving function. The power saving method based on the discontinuous receiving function comprises: a terminal receives configuration information for discontinuous DRX parameter receiving of network voice call VoIP service sent by a base station; when the terminal is in a DRX activation state, the terminal performs one-time PDCCH blind detection in a long DRX Cycle when the VoIP service is in an activation period; the terminal perform one-time or two-time blind detection in a short DRX Cycle when the VoIP service is in a silence period; the terminal is in a DRX non-activation state and performs one-time or two-time blind detection in the short DRX Cycle when receiving MAC DRX CE sent by the base station. In the scheme, by setting the long DRX Cycle in the configuration information of VoIP service DRX parameters sent by the base station, the PDCCH blind detection times are decreased, and the power saving purpose is achieved.
Description
Technical Field
The present invention relates to the field of mobile communications, and in particular, to a power saving method and apparatus based on a discontinuous reception function.
Background
The 36.321 protocol achieves the purpose of Discontinuous monitoring by a UE (User Equipment) for a PDCCH (Physical Downlink Control Channel) through a series of processing procedures of standardized DRX (Discontinuous Reception), and the specific details refer to the relevant content of DRX of section 5.7 of the 36.321 protocol.
Fig. 1 is a diagram illustrating the relationship between timers in the prior art, which shows the relationship between various timers.
The protocol specifies that DRX is divided into two states: DRX active state and DRX inactive state. In the DRX-activated state, the UE in the RRC _ CONNECTED state does not monitor a C-RNTI (Cell Radio Network Temporary Identifier), a TPC-PUCCH-RNTI (Transmission Power Control-Physical Uplink Control Channel-Radio Network Temporary Identifier), a TPC-PUSCH-Temporary Identifier (Transmission Power Control Physical Uplink Shared Channel-Radio Network Temporary Identifier), an SPS C-RNTI (Semi-Persistent Scheduling Cell Radio Network Temporary Identifier)/a scrambling Channel quality Indicator (PMI)/Precoding Indicator (PMI), rank indication)/PTI (Precoding Type Indicator), otherwise, vice versa.
The protocol specifies that DRX is inactive when any of the following conditions are met:
onDurationTimer
or drx-InactivityTimer
Or drx-retransmission timer
Or mac-ContentionResolutionTimer is running;
triggering an SR (Scheduling Request) on a PUCCH (Physical Uplink Control Channel), where the SR is in a pending state (after the SR is triggered, the SR enters the pending state, and after grant Scheduling is received, the SR exits the pending state);
a Hybrid Automatic Repeat Request (HARQ) buffer (Hybrid Automatic Repeat Request buffer) has data to be retransmitted and may receive a grant indicating retransmission;
the 4 timers described above, which relate to DRX in inactive state, are defined in the protocol as follows at the starting, restarting, stopping or timeout moments:
table 1 shows a mapping relationship established among the name of a timer, a triggered event, and a stopped event in a DRX-related timer.
TABLE 1 timer name, trigger event and stop event mapping table
When short Discontinuous Reception (DRX) is configured in Radio Resource Control (RRC), when a DRX is timed out or a Media Access Control (Media Discontinuous Reception) Discontinuous Reception (MAC CE) Element is received, a short DRX cycle is used and simultaneously started or restarted;
using the short DRX cycle, the start of the onDurationTimer is determined by the following equation:
[(SFN*10)+subframe number]modulo(shortDRX-Cycle)=
(drxStartOffset)modulo(shortDRX-Cycle)
using the long DRX cycle after the drxShortCycleTimer times out, the start of the onDurationTimer is determined by the following equation:
[(SFN*10)+subframe number]modulo(longDRX-Cycle)=
(drxStartOffset)
fig. 2 is a schematic diagram of a VoIP (Voice over Internet Protocol) service source model in the prior art, which shows that the size of data packets and the transmission interval of the VoIP service source are regular, an active period is that there is a data packet every 20ms, and a quiet period is that there is a SID (Silence Descriptor) packet every 160ms, as can be seen from fig. 2, the semi-persistent scheduling is applicable to the VoIP service, and the semi-persistent scheduling is adopted in the active period, and a dynamic scheduling manner is adopted in the quiet period and during retransmission, so that the goals of saving PDCCH resources and reasonably occupying shared resources are achieved.
When only VoIP service is performed, in order to save power as much as possible, a common way at present is to configure a long Discontinuous Reception (DRX) Cycle of 20ms and an on Duration Timer length of 1 or 2 PDCCH lengths for the terminal, which has the following advantages: the terminal only needs to perform PDCCH blind detection once or twice in the activation period of the voice service every 20ms, wherein the number of blind detections is equal to the length of the onDurationTimer, and the aim of switching from the silent period to the activation period in time is achieved by performing PDCCH blind detection once or twice in every 20ms at the silent period terminal, so that the time delay can be effectively reduced.
In the prior art, aiming at the characteristics of the VoIP service, a long DRX Cycle of 20ms is used to ensure that the PDCCH blind detection is carried out on the subframes where every 20ms voice packet arrives in the activation period of the voice service, so that the battery consumption caused by the blind detection on other subframes is avoided. However, in the active period of the VoIP service, the PDCCH is not required to be transmitted every 20ms, and in most cases, only the PDSCH is transmitted, so the long DRX Cycle of 20ms makes the terminal have to perform PDCCH blind detection several times every 20ms, and there is still unnecessary waste.
Therefore, it is necessary to provide an effective solution to the above problems.
Disclosure of Invention
The purpose of the present invention is to solve at least one of the above technical defects, and in particular, to achieve the purpose of power saving by setting configuration information of DRX parameters for VoIP services, which is sent by a base station, to include short DRX Cycle and long DRX Cycle.
In order to achieve the above object, an aspect of the embodiments of the present invention provides a power saving method based on a discontinuous reception function, including:
the method comprises the steps that a terminal receives configuration information of Discontinuous Reception (DRX) parameters, which is sent by a base station and aims at VoIP service, wherein the configuration information comprises a short DRX Cycle and a long DRX Cycle, and the long DRX Cycle is at least two times of the short DRX Cycle;
when the terminal is in a DRX active state:
when the VoIP service is in an activation period, the terminal performs one-time Physical Downlink Control Channel (PDCCH) blind detection on the long DRX Cycle;
when the VoIP service is in a silent period, the terminal performs PDCCH blind detection once or twice in the short DRX Cycle;
and when the terminal receives a media access control discontinuous reception control unit (MAC DRX CE) sent by the base station, the terminal enters a DRX inactive state and performs PDCCH blind detection once or twice in the short DRX Cycle.
In another aspect, an embodiment of the present invention further provides a power saving device based on a discontinuous reception function, including a receiving module and a detecting module,
the receiving module is used for receiving configuration information of Discontinuous Reception (DRX) parameters aiming at VoIP service of a voice over internet protocol (VoIP) service sent by a base station and receiving a Media Access Control (MAC) DRX (discontinuous reception) control unit (MAC DRX CE) sent by the base station, wherein the configuration information comprises a short DRX Cycle and a long DRX Cycle, and the long DRX Cycle is at least more than two times of the short DRX Cycle;
while in the DRX active state:
when the VoIP service is in an activation period, the detection module is used for carrying out one-time physical downlink control channel PDCCH blind detection on the long DRXCycle;
when the VoIP service is in a silent period, the detection module is used for carrying out PDCCH blind detection once or twice on the short DRXCycle; and the number of the first and second groups,
entering a DRX inactive state:
the detection module is used for carrying out PDCCH blind detection once or twice in the short DRX Cycle.
According to the scheme provided by the invention, the number of times of PDCCH blind detection is reduced by setting the long discontinuous reception Cycle (Long DRX Cycle) in the configuration information of the DRX parameters aiming at the VoIP service, which is sent by the base station, so that the purpose of power saving is realized; setting a short discontinuous reception Cycle (DRX) Cycle in configuration information aiming at DRX parameters of the VoIP service, which is sent by a base station, so that the VoIP service can be switched from a silent period to an active period in time, and the time delay is reduced; wherein, the long discontinuous reception Cycle long DRX Cycle is at least more than two times of the short DRX Cycle. The scheme provided by the invention has the advantages that the change of the existing system is small, the compatibility of the system is not influenced, and the realization is simple and efficient.
Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
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The foregoing and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a diagram illustrating the relationship between timers in the prior art;
FIG. 2 is a schematic diagram of a VoIP service source model in the prior art;
FIG. 3 is a flowchart illustrating a power saving method based on discontinuous reception according to an embodiment of the present invention;
fig. 4 is a schematic diagram illustrating the use of short DRX Cycle in VoIP service according to another embodiment of the present invention;
FIG. 5 is a flowchart illustrating a process for ending a terminal DRX state by triggering a MAC DRX CE according to another embodiment of the present invention;
fig. 6 is a schematic structural diagram of a power saving device based on a discontinuous reception function according to an embodiment of the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative only and should not be construed as limiting the invention.
In an LTE (Long Term Evolution) system, a shared channel is used for uplink and downlink service data transmission of a UE, both uplink and downlink scheduling are controlled by a base station, and a terminal needs to perform monitoring and blind detection on a PDCCH channel to determine whether there is a scheduling signaling for the terminal. If the UE is in the RRC _ CONNECTED state but only establishes the VoIP service bearer, since VoIP is a service with a regular service source packet size and transmission interval, the base station only regularly transmits a scheduling signaling to the UE on the PDCCH control channel, in this case, it is not necessary for the terminal to continuously monitor and blindly detect the PDCCH channel, which increases the consumption of the terminal battery.
In order to prolong the standby time of the UE and improve the user experience, the LTE system introduces a DRX function for power saving.
In the prior art, aiming at the characteristics of the VoIP service, a long DRX Cycle of 20ms is used to ensure that the PDCCH blind detection is carried out on the subframes where every 20ms voice packet arrives in the activation period of the voice service, so that the battery consumption caused by the blind detection on other subframes is avoided.
In the above scheme, since the VoIP service does not need to transmit the PDCCH every 20ms in the active period, and mostly only transmits the PDSCH, the 20ms long DRXCycle requires the terminal to perform PDCCH blind detection several times every 20ms, which still causes unnecessary waste.
The invention provides that not only the long DRX Cycle but also the short DRX Cycle are configured, and the long DRX Cycle is at least two times of the short DRX Cycle through configuration so as to give consideration to the requirements of power saving and time delay of the VoIP service.
In order to achieve the object of the present invention, an embodiment of the present invention provides a power saving method based on a discontinuous reception function, including the following steps:
the terminal receives configuration information of Discontinuous Reception (DRX) parameters aiming at VoIP services of network voice phones, which is sent by a base station, wherein the configuration information comprises a short DRX Cycle and a long discontinuous reception Cycle long DRX Cycle, and the long DRX Cycle is at least two times of the short DRX Cycle;
when the terminal is in the DRX active state:
when the VoIP service is in an activation period, the terminal performs one-time Physical Downlink Control Channel (PDCCH) blind detection in a long DRX Cycle;
when the VoIP service is in a silent period, the terminal performs PDCCH blind detection once or twice in a short DRX Cycle;
and when the terminal receives the MAC DRX CE sent by the base station, the terminal enters a DRX inactive state and carries out PDCCH blind detection once or twice in a short DRX Cycle.
According to the scheme provided by the invention, the number of times of PDCCH blind detection is reduced by setting the long discontinuous reception Cycle (Long DRX Cycle) in the configuration information of the DRX parameters aiming at the VoIP service, which is sent by the base station, so that the purpose of power saving is realized; setting a short discontinuous reception Cycle (DRX) Cycle in configuration information aiming at DRX parameters of the VoIP service, which is sent by a base station, so that the VoIP service can be switched from a silent period to an active period in time, and the time delay is reduced; wherein the long DRXCcycle is at least two times as long as the short DRX Cycle. The scheme provided by the invention has the advantages that the change of the existing system is small, the compatibility of the system is not influenced, and the realization is simple and efficient.
As shown in fig. 3, a flowchart of a power saving method based on a drx function according to an embodiment of the present invention includes steps S110 to S130. The details thereof are explained below with reference to specific embodiments.
S110: the terminal receives configuration information of DRX parameters for VoIP service, which is sent by a base station.
In step S110, the configuration information includes a short DRX Cycle and a long DRX Cycle, and the long DRX Cycle is at least twice as long as the short DRX Cycle.
In step S110, the number of times of PDCCH blind detection is reduced by setting a long discontinuous reception Cycle long DRX Cycle in configuration information of DRX parameters for VoIP traffic sent by a base station, so as to achieve the purpose of power saving; wherein the long DRX Cycle is at least more than twice as long as the short DRX Cycle.
In step S110, a short DRX Cycle in the configuration information of the DRX parameters for the VoIP service sent by the base station is set, so that the VoIP service can be switched from a quiet period to an active period in time, and a time delay is reduced; wherein the long DRX Cycle is at least more than twice as long as the short DRX Cycle.
In a specific embodiment of the present invention, the long DRX Cycle is configured to be 160ms, and the short DRX Cycle is configured to be 20ms, so as to meet the requirements of power saving and delay of the VoIP service. The specific parameter configuration is shown in table 2, and table 2 shows the mapping relationship established between the DRX parameter and the configuration value for the VoIP service.
Table 2 mapping table of DRX parameters and configuration values for VoIP traffic
Fig. 4 is a schematic diagram illustrating a short DRX Cycle used in a VoIP service according to another embodiment of the present invention. By configuring a short DRX Cycle of 20ms in the silent period of the VoIP service, the VoIP service can be ensured to be switched from the silent period to the active period in time, and the time delay is reduced. By configuring a long DRX Cycle of 160ms in the VoIP service activation period, the terminal is ensured to perform PDCCH blind detection once every 160ms in the activation period, wherein the number of blind detections is equal to the length of an onDurationTimer. In the prior art, the terminal needs to perform blind detection for 8 times within 160ms of the activation period of the VoIP service, but in the invention, the terminal only needs to perform blind detection for 1 time within 160ms, namely, 87.5 percent of PDCCH blind detection times are saved in the activation period of the VoIP service; the frequency of PDCCH blind detection is reduced, so that the purpose of power saving is achieved.
S120: when the terminal is in the DRX activation state, corresponding operation is executed according to a judgment result of judging whether the VoIP service is in the activation period or the silent period.
In a specific embodiment of the present invention, when the terminal is in the DRX active state: and when the VoIP service is in an activation period, the terminal performs PDCCH blind detection once in a long DRX Cycle.
In a specific embodiment of the present invention, when the VoIP service is in the silent period, the terminal performs one or two PDCCH blind detections in the short DRX Cycle.
Further, when the terminal is in the DRX activated state and detects a PDCCH or a PDSCH (Physical Downlink Shared Channel), the terminal starts HARQRTT TIMER (Hybrid Automatic Repeat Request Round Trip Time TIMER) for detecting a retransmission corresponding to the PDSCH.
The above description is about the situation that the VoIP service uses the DRX function to save power in the most ideal situation, and the ideal configuration can give consideration to the requirements of VoIP delay and power saving to the greatest extent. However, in practical applications, it cannot be guaranteed that only semi-persistent scheduling is used all the time in the VoIP active period, and when conditions such as insufficient semi-persistent resources, channel quality change, transition of the active period to the quiet period, and the like occur, dynamic scheduling must be performed to perform temporary resource allocation, and at this time, the terminal is required to end the DRX state, and PDCCH detection is performed as soon as possible, so as to reduce detection delay.
With reference to fig. 5, a detailed description is given to a process flow for triggering the MAC DRX CE to end the terminal DRX state, specifically as follows:
the base station judges whether the terminal is in a VoIP activation period, and if the judgment result is in the VoIP activation period, whether the terminal needs to be converted into a silent period is judged; if the terminal needs to switch into the silent period, the base station sends data on the PDSCH configured by the SPS; wherein, the data carries a byte of DRXMAC CE; after receiving the DRX MAC CE, the terminal detects whether a short DRX Cycle is configured or not, and if the short DRX Cycle is configured, the terminal enters the short DRX Cycle; and if the shortDRX Cycle is not configured, entering the long DRX Cycle.
If the base station judges that the terminal does not need to be converted into the silent period, whether the terminal enters a DRX state and does not detect a PDCCH state is judged, if the terminal enters a DRX activation state, the base station continuously judges whether the PDCCH needs to be dynamically scheduled, and if the PDCCH needs to be dynamically scheduled, data is sent on a PDSCH configured by the SPS; wherein, the data carries a DRX MAC CE of one byte; after receiving the DRX MAC CE, the terminal detects whether a short DRX Cycle is configured, if so, the terminal enters the short DRX Cycle and performs PDCCH blind test once every 20 ms; if short DRX Cycle is not configured, entering long DRX Cycle, and performing PDCCH blind test once every 160 ms; if no PDCCH is dynamically scheduled, the process is ended.
If the base station judges that the terminal is not in the VoIP active period, the base station carries one byte of DRX MAC CE in the data when sending the PDSCH each time in the silent period; after receiving the DRXMAC CE, the terminal detects whether a short DRX Cycle is configured, and if the short DRX Cycle is configured, the terminal enters the short DRX Cycle; and if short DRX Cycle is not configured, entering long DRXCcycle.
Therefore, the above scheme utilizes the characteristic that the DRX function does not restrict the receiving of the PDSCH channel, when in the active period of the VoIP service, the VoIP service only sends the PDSCH every 20ms through semi-persistent scheduling, so that the receiving of the PDSCH channel is not influenced by configuring the DRX CYCLE with a larger value, and the power is saved to the maximum extent.
In the protocol 3gpp TS36.213, there are the following constraints:
during the Active Time，for a PDCCH-subframe，if the subframe is notrequired for uplink transmission for half-duplex FDD UE operation and if thesubframe is not part of a configured measurement gap：
monitor the PDCCH；
if the PDCCH indicates a DL transmission or if a DL assignment hasbeen configured for this subframe：
start the HARQ RTT Timer for the corresponding HARQ process；
stop the drx-Retransmission Timer for the corresponding HARQprocess.
as can be seen from the protocol constraints, the terminal detects the PDSCH of SPS only in subframes where the terminal can perform blind detection (i.e., not entering DRX state) and starts HARQ RTT TIMER, otherwise the terminal does not start the timer. Only when HARQ RTT TIMER is started, the terminal can start the drx Retransmission Timer, and only when the drx Retransmission Timer is started, the terminal can be ensured to detect the Retransmission corresponding to the PDSCH of the SPS in time. Therefore, the constraint of the part of the protocol introduces unnecessary limitation to the retransmission of the PDSCH of the SPS, and prolongs the time delay of the retransmission.
The present invention is directed to the above problems, and is modified accordingly, so as to remove the constraint of this part, and modified that HARQ RTT TIMER can be started whenever the PDCCH or PDSCH is detected, regardless of whether the terminal enters the DRX state. The method can ensure that the terminal detects the retransmission corresponding to the PDSCH of the SPS in time, and effectively reduces the retransmission time delay.
S130: and when the terminal receives the MAC DRX CE sent by the base station, the terminal enters a DRX inactive state and carries out PDCCH blind detection once or twice in a short DRX Cycle.
In a specific embodiment of the present invention, the method for receiving the MAC DRX CE sent by the base station by the terminal includes:
when the VoIP service is in an active period, the terminal receives data sent by the base station on the PDSCH under semi-static configuration, and when the VoIP service is switched from the active period to a silent period, the PDSCH data received by the terminal carries a byte DRX MAC CE; or,
when the VoIP service is in an activation period, the terminal receives data sent by the base station on the PDSCH under semi-static configuration, the DRX is in an activation state, and meanwhile, when PDCCH dynamic scheduling needs to be carried out, the PDSCH data received by the terminal carries one byte of DRX MAC CE.
In another embodiment of the present invention, the method for receiving the MAC DRXCE sent by the base station by the terminal includes:
when the VoIP service is in a silent period, the terminal receives data sent by the base station on the PDSCH, wherein the PDSCH data received by the terminal carries one byte of DRX MAC CE.
Further, when the terminal is in DRX inactive state and detects PDCCH or PDSCH, the terminal starts HARQ RTT TIMER for detecting retransmission corresponding to PDSCH.
According to the scheme provided by the invention, the number of times of PDCCH blind detection is reduced by setting the long discontinuous reception Cycle (Long DRX Cycle) in the configuration information of the DRX parameters aiming at the VoIP service, which is sent by the base station, so that the purpose of power saving is realized; setting a short discontinuous reception Cycle (DRX) Cycle in configuration information aiming at DRX parameters of the VoIP service, which is sent by a base station, so that the VoIP service can be switched from a silent period to an active period in time, and the time delay is reduced; wherein the long DRXCcycle is at least two times as long as the short DRX Cycle. The scheme provided by the invention has the advantages that the change of the existing system is small, the compatibility of the system is not influenced, and the realization is simple and efficient.
The scheme provided by the invention has the advantages that the change of the existing system is small, the compatibility of the system is not influenced, and the realization is simple and efficient.
Furthermore, the scheme provided by the invention is simple to implement and low in complexity.
Furthermore, the scheme provided by the invention removes unnecessary protocol constraints, and effectively ensures the time delay of PDSCH retransmission of SPS through simple protocol modification.
Further, the scheme provided by the invention provides a new method for triggering short DRX Cycle by using MAC DRX CE aiming at VoIP service.
Further, the above scheme proposed by the present invention gives a new method how the VoIP service uses DRX in the silent period and the active period.
Further, the scheme provided by the invention is not only suitable for an LTE TDD (Long Term Evolution Time Division duplex) system, but also suitable for an LTE FDD (Long Term Evolution Frequency Division duplex) system.
As shown in fig. 2, an embodiment of the present invention further discloses a power saving device 100 based on a discontinuous reception function, which includes a receiving module 110 and a detecting module 120.
The receiving module 110 is configured to receive configuration information of a discontinuous reception DRX parameter for a VoIP service of a voice over internet protocol sent by a base station and configured to receive a media access control discontinuous reception control unit MAC DRX CE sent by the base station, where the configuration information includes a short DRX Cycle and a long DRX Cycle, and the long DRX Cycle is at least twice as long as the short DRX Cycle.
In a specific embodiment of the present invention, the long DRX Cycle is configured to be 160ms, and the short DRX Cycle is configured to be 20ms, so as to meet the requirements of power saving and delay of the VoIP service. For the specific parameter configuration, refer to table 2.
Further, the receiving module 110 is configured to receive the MAC DRX CE sent by the base station, and includes the following manners: when the VoIP service is in the active period, the receiving module 110 is configured to receive data sent by the base station on the PDSCH of the physical downlink shared channel under the semi-static configuration, and when the VoIP service is shifted from the active period to the silent period, the PDSCH data received by the receiving module 110 carries a byte of DRX MAC CE; or, when the VoIP service is in the active period, the receiving module 110 is configured to receive data sent on the PDSCH by the base station under the semi-static configuration, and when the DRX is in the active state and the PDCCH dynamic scheduling is required, the PDSCH data received by the receiving module 110 carries a byte of DRX MAC CE.
In addition, the receiving module 110 may further include the following means for receiving the MAC DRX CE sent by the base station: when the VoIP service is in the silent period, the receiving module 110 is configured to receive data sent by the base station on the PDSCH, where the PDSCH data received by the receiving module 110 carries a DRX MAC CE of one byte.
The above list only two ways for the receiving module 110 to receive the MAC DRX CE transmitted by the base station, and is not limited thereto, and will not be described herein again.
The detection module 120 performs a corresponding operation with respect to a different determination result of determining whether the power saving device 100 based on the discontinuous reception function is in the DRX active state or in the DRX active state.
In a specific embodiment of the present invention, when the terminal is in the DRX active state, corresponding operations are performed according to a determination result for determining whether the VoIP service is in the active period or the silent period.
Specifically, when in the DRX active state and the VoIP service is in the active period, the detection module 120 is configured to perform one-time PDCCH blind detection on the physical downlink control channel in the long DRX Cycle.
When in DRX active state and the VoIP traffic is in silent period, the detection module 120 is configured to perform PDCCH blind detection once or twice in short DRX Cycle.
Further, when the discontinuous reception function-based power saving device 100 is in the DRX-activated state, the detection module 120 starts the hybrid automatic repeat request round trip delay timer HARQ RTT TIMER when the detection module 120 detects the PDCCH or the PDSCH, and the detection module 120 is configured to detect a retransmission corresponding to the PDSCH.
In another embodiment of the present invention, when entering the DRX inactive state: the detection module 120 is used for performing one or two PDCCH blind detections in the short DRX Cycle.
Further, when the discontinuous reception function-based power saving device 100 is in the DRX-inactive state, and the detection module 120 detects the PDCCH or the PDSCH, the detection module HARQ RTTTIMER is started, and the detection module 120 is configured to detect a retransmission corresponding to the PDSCH.
In a specific application, the power saving device 100 is usually embodied as a terminal device.
According to the scheme provided by the invention, the number of times of PDCCH blind detection is reduced by setting the long discontinuous reception Cycle (Long DRX Cycle) in the configuration information of the DRX parameters aiming at the VoIP service, which is sent by the base station, so that the purpose of power saving is realized; meanwhile, the short discontinuous reception cycle DRXCcycle in the configuration information of the DRX parameter aiming at the VoIP service sent by the base station is set, so that the VoIP service can be switched from a silent period to an active period in time, and the time delay is reduced; wherein the long DRX Cycle is at least more than twice as long as the short DRX Cycle. The scheme provided by the invention has the advantages that the change of the existing system is small, the compatibility of the system is not influenced, and the realization is simple and efficient.
Furthermore, the scheme provided by the invention is simple to implement and low in complexity.
Furthermore, the scheme provided by the invention removes unnecessary protocol constraints, and effectively ensures the time delay of PDSCH retransmission of SPS through simple protocol modification.
Further, the scheme provided by the invention provides a new method for triggering short DRX Cycle by using MAC DRX CE aiming at VoIP service.
Further, the above scheme proposed by the present invention gives a new method how the VoIP service uses DRX in the silent period and the active period.
Furthermore, the scheme provided by the invention is not only suitable for an LTE TDD system, but also suitable for an LTE FDD system.
It will be understood by those skilled in the art that all or part of the steps carried by the method for implementing the above embodiments may be implemented by hardware related to instructions of a program, which may be stored in a computer readable storage medium, and when the program is executed, the program includes one or a combination of the steps of the method embodiments.
In addition, functional units in the embodiments of the present invention may be integrated into one processing module, or each unit may exist alone physically, or two or more units are integrated into one module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. The integrated module, if implemented in the form of a software functional module and sold or used as a stand-alone product, may also be stored in a computer readable storage medium.
The storage medium mentioned above may be a read-only memory, a magnetic or optical disk, etc.
The foregoing is only a partial embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (8)
1. A power saving method based on discontinuous reception function is characterized by comprising the following steps:
the method comprises the steps that a terminal receives configuration information of Discontinuous Reception (DRX) parameters, which is sent by a base station and aims at VoIP service, wherein the configuration information comprises a short DRX Cycle and a long DRX Cycle, and the long DRX Cycle is at least two times of the short DRX Cycle;
when the terminal is in a DRX active state:
when the VoIP service is in an activation period, the terminal performs one-time Physical Downlink Control Channel (PDCCH) blind detection on the long DRX Cycle;
when the VoIP service is in a silent period, the terminal performs PDCCH blind detection once or twice in the short DRX Cycle;
and when the terminal receives a media access control discontinuous reception control unit (MAC DRX CE) sent by the base station, the terminal enters a DRX inactive state and performs PDCCH blind detection once or twice in the short DRX Cycle.
2. The method of claim 1, wherein the long DRX Cycle is 160ms and the short DRX Cycle is 20 ms.
3. The method of claim 1, wherein the terminal receives the MAC DRX CE transmitted by the base station, and the method comprises any one of the following steps:
when the VoIP service is in an active period, the terminal receives data sent by the base station on a Physical Downlink Shared Channel (PDSCH) under semi-static configuration, and when the VoIP service is switched from the active period to a silent period, the PDSCH data received by the terminal carries a byte DRX MACCE;
when the VoIP service is in an activation period, the terminal receives data sent by the base station on the PDSCH under semi-static configuration, and when DRX is in an activation state and needs to carry out PDCCH dynamic scheduling, the PDSCH data received by the terminal carries DRX MACCE with one byte;
and when the VoIP service is in a silent period, the terminal receives data sent by the base station on the PDSCH, wherein the PDSCH data received by the terminal carries one byte of DRXMAC CE.
4. The discontinuous reception function-based power saving method of claim 1, wherein when the terminal is in a DRX active state or a DRX inactive state, and detects the PDCCH or the PDSCH, the terminal starts a hybrid automatic repeat request round trip delay timer HARQ RTT TIMER for detecting a retransmission corresponding to the PDSCH.
5. A power saving device based on discontinuous reception function is characterized by comprising a receiving module and a detecting module,
the receiving module is used for receiving configuration information of Discontinuous Reception (DRX) parameters aiming at VoIP service of a voice over internet protocol (VoIP) service sent by a base station and receiving a Media Access Control (MAC) DRX (discontinuous reception) control unit (MAC DRX CE) sent by the base station, wherein the configuration information comprises a short DRX Cycle and a long DRX Cycle, and the long DRX Cycle is at least more than two times of the short DRX Cycle;
while in the DRX active state:
when the VoIP service is in an activation period, the detection module is used for carrying out one-time physical downlink control channel PDCCH blind detection on the long DRXCycle;
when the VoIP service is in a silent period, the detection module is used for carrying out PDCCH blind detection once or twice on the short DRXCycle; and the number of the first and second groups,
entering a DRX inactive state:
the detection module is used for carrying out PDCCH blind detection once or twice in the short DRX Cycle.
6. The discontinuous reception function-based power saving device according to claim 5, wherein the long DRX Cycle is 160ms, and the short DRX Cycle is 20 ms.
7. The device of claim 5, wherein the receiving module is configured to receive the MAC DRX CE sent by the base station, and includes any one of the following manners:
when the VoIP service is in an active period, the receiving module is used for receiving data sent by the base station on a Physical Downlink Shared Channel (PDSCH) under semi-static configuration, and when the VoIP service is switched from the active period to a silent period, the data carries a byte of DRX MAC CE;
when the VoIP service is in an active period, the receiving module is used for receiving data sent by the base station on the PDSCH under semi-static configuration, and when DRX is in an active state and needs to perform PDCCH dynamic scheduling, the PDSCH data received by the receiving module carries a byte of DRX MAC CE;
when the VoIP service is in the silent period, the receiving module is configured to receive data sent by the base station on the PDSCH, where the PDSCH data received by the receiving module carries a byte of DRX MAC CE.
8. The DRX-based power saving device of claim 5, wherein the HARQ round trip delay timer HARQRTT TIMER is started when the detection module detects the PDCCH or the PDSCH while the device is in a DRX-active state or a DRX-inactive state, and the detection module is configured to detect a retransmission corresponding to the PDSCH.
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