WO2011157159A2

WO2011157159A2 - Mixed discontinuous reception method, base station and user device

Info

Publication number: WO2011157159A2
Application number: PCT/CN2011/075094
Authority: WO
Inventors: 夏金环; 常俊仁
Original assignee: 华为技术有限公司
Priority date: 2011-06-01
Filing date: 2011-06-01
Publication date: 2011-12-22
Also published as: CN102257859B; CN102257859A; WO2011157159A3

Abstract

A mixed discontinuous reception DRX method, a base station and a user device are provided. The mixed DRX method includes the following steps: an extended discontinuous reception DRX cycle mode is configured, and in the extended DRX cycle mode, each extended DRX period is larger than or equal to a time alignment timer TAT of a user device; a time alignment update TAU DRX period mode is configured, and a first TAU DRX is configured at the first predetermined time less than TAT that at the first DRX period starting or after it starting, wherein the time difference between any two adjacent TAU DRX periods of multiple TAU DRX periods is less than TAT; the extended DRX cycle mode and TAU DRX period mode are sent to the user device; a time alignment TA command is sent at the second predetermined time which after a sounding reference signal SRS sent by the user device is received. The above mixed DRX method, base station and user device can have DRX cycle corresponding to the periodicity service characteristic of the user device, and can make the user device maintain uplink synchronization at the same time.

Description

Hybrid discontinuous reception method and base station and user equipment

Embodiments of the present invention relate to the field of communication technologies, and, more particularly, to a hybrid discontinuous reception method and a base station and user equipment. Background technique

DRX (discontinuous reception) refers to a discontinuous reception state, that is, the UE (user equipment) can turn off the receiver for a period of time to save power. In LTE (Long Term Evolution), DRX means that the UE stops monitoring the PDCCH (physical downlink control channel) for a period of time. There are two types of DRX: IDLE DRX (idle DRX), as the name implies, that is, when the UE is in idle state, there is no RRC (radio resource control) connection and user because it is in the IDLE state. The proprietary resources, therefore, in the idle DRX, mainly listen to the paging channel and the broadcast channel, as long as a fixed period is defined, the purpose of discontinuous reception can be achieved. However, if the UE wants to listen to the user data channel, it enters the connection state from the idle state first.

The other is ACTIVE DRX (active DRX), that is, the DRX in which the UE is in the RRC connection state, which can optimize system resource configuration, and more importantly, can save mobile phone power without having to let the mobile phone enter RRC idle mode. To achieve this goal. For example, some non-real-time applications, such as web browsing, instant messaging, etc., always exist for a while, the mobile phone does not need to constantly monitor the downlink data and related processing, then DRX can be applied to such a situation, and because of this state still There is an RRC connection, so the UE has to go to the data transceiving state very quickly.

MTC (machine type communication) data service transmission exhibits periodic packet characteristics, that is, the amount of data that needs to be transmitted each time is small, and there is a relatively fixed time interval between data transmissions. For such service characteristics, the existing DRX technology needs to be optimized so that the UE can truly achieve the purpose of power saving. Summary of the invention

The present invention has been made in view of the above objects, and an object of the present invention is to provide a hybrid discontinuous reception Method and base station and user equipment, which can be extended for periodic service characteristics of user equipment

The DRX cycle, and at the same time, enables the user equipment to maintain uplink synchronization in the extended DRX cycle described above.

In one aspect, a hybrid discontinuous reception method is provided, including: configuring an extended discontinuous reception DRX cycle mode, wherein in the extended DRX cycle mode, configuring an extended DRX cycle, the extension The DRX period includes a plurality of extended DRX periods, each extended DRX period of the plurality of extended DRX periods being greater than or equal to a timing advance timer TAT of the user equipment; configuring the timing advance amount to update the TAU DRX period mode, Wherein, in the TAU DRX period mode, a plurality of TAU DRX periods are configured, in the extended DRX period, when the first DRX period of the plurality of extended DRX periods starts or begins to be smaller than The first predetermined time of the TAT is configured with a first one of the plurality of TAU DRX periods, and a time difference between any two adjacent ones of the plurality of TAU DRX periods is less than Transmitting the extended DRX cycle mode and the TAU DRX time period mode to the user equipment; receiving the probe sent by the user equipment The second predetermined time after the reference signal SRS transmission timing advance TA command.

Another aspect provides a hybrid discontinuous reception method, comprising: receiving an extended discontinuous reception DRX cycle mode and a timing advance update TAU DRX period mode from a base station; setting according to the extended DRX cycle mode An extended DRX cycle of the user equipment, wherein the extended DRX cycle includes a plurality of extended DRX periods, and each extended DRX period of the plurality of extended DRX periods is greater than or equal to a timing advance timing of the user equipment Setting a plurality of TAU DRX periods of the user equipment according to the TAU DRX period mode, wherein, in the extended DRX period, starting or starting at a first DRX period of the plurality of extended DRX periods The first one of the plurality of TAU DRX periods is set with the first predetermined time less than the TAT, and between any two adjacent TAU DRX periods of the plurality of TAU DRX periods Time difference is less than the TAT; transmitting a sounding reference signal SRS according to the setting of the plurality of TAU DRX periods; and each TAU in the plurality of TAU DRX periods The DRX period remains awake from the DRX state and receives a timing advance TA command from the base station to maintain uplink synchronization.

In still another aspect, a hybrid discontinuous reception method is provided, comprising: setting an extended discontinuous reception DRX cycle, wherein the extended DRX cycle includes a plurality of extended DRX periods, the multiple extensions Each extended DRX period in the DRX period is greater than or equal to a timing advance timer TAT for the user equipment; maintaining the first TAT of the user equipment to send a sounding reference signal SRS to the base station at a third predetermined time before the first TAT timeout; entering the fourth predetermined time after transmitting the SRS The timing advance amount updates the TAU DRX period, stays awake from the DRX state during the active time of the TAU DRX period, and receives the timing advance TA command from the base station to maintain uplink synchronization; and resets when the TA command is successfully decoded The first TAT.

In another aspect, a hybrid discontinuous reception method is provided, including: receiving a sounding reference signal SRS sent from the user equipment; maintaining a second timing advance timer TAT of the user equipment, and referring to Determining, by the second TAT, whether the SRS is an SRS sent by the user equipment at a third predetermined time before the second TAT timeout; determining that the SRS is before the user equipment is timed out by the second TAT In the case of the SRS transmitted by the third predetermined time, the timing advance amount TA is transmitted to the user equipment for the fourth predetermined time after receiving the SRS to cause the user terminal to maintain the uplink synchronization; After the user equipment successfully decodes the TA command, the second predetermined time after the TA command is sent from the user equipment, the second TAT is reset, wherein the second TAT time length of the base station side is smaller than the The time length of the first TAT on the user equipment side is less than the fifth predetermined time.

In another aspect, a hybrid discontinuous reception method is provided, which includes: receiving an arbitrary sounding reference signal SRS sent by a user equipment or an SRS having a specific identifier; and receiving any SRS sent by the user equipment or having a specific The timing advance TA command is transmitted for a fourth predetermined time after the identified SRS to assist the user equipment to maintain uplink synchronization.

In still another aspect, a base station is provided, including: extended discontinuous reception

a DRX periodic mode configuration unit, configured to configure an extended DRX cycle mode, where, in the extended DRX cycle mode, an extended DRX cycle is configured, where the extended DRX cycle includes multiple extended DRX periods, where the multiple Each extended DRX period of the extended DRX periods is greater than or equal to the timing advance timer TAT of the user equipment; the timing advance quantity update TAU DRX period mode configuration unit is configured to configure a TAU DRX period mode, wherein In the TAU DRX period mode, a plurality of TAU DRX periods are configured, in the first DRX period of the plurality of extended DRX periods, or a first less than the first of the TATs in the extended DRX period a predetermined time is configured with a first one of the plurality of TAU DRX periods, and a time difference between any two adjacent ones of the plurality of TAU DRX periods is less than the TAT; a mode transmitting unit And connecting to the extended DRX cycle mode configuration unit and the TAU DRX period mode configuration unit, for using the extended DRX cycle mode And the TAU DRX time period mode is sent to the user equipment; and the timing advance TA command sending unit is connected to the mode sending unit, for receiving the sounding reference signal SRS sent by the user equipment The TA command is sent at the scheduled time.

In another aspect, a user equipment is provided, including: a mode receiving unit, configured to receive an extended discontinuous reception DRX cycle mode and a timing advance amount update TAU DRX time period mode from a base station; and an extended DRX cycle setting unit And connecting to the mode receiving unit, configured to set an extended DRX cycle of the user equipment according to the extended DRX cycle mode, where the extended DRX cycle includes multiple extended DRX periods, and the multiple extended The extended DRX period in the DRX period is greater than or equal to the timing advance timer TAT of the user equipment; the TAU DRX period setting unit is connected to the mode receiving unit, and is configured to set the user equipment according to the TAU DRX period mode. a plurality of TAU DRX periods, wherein, in the extended DRX cycle, a first predetermined time setting less than the TAT is started at or after the first DRX period of the plurality of extended DRX periods Determining a first one of the plurality of TAU DRX periods, and any two of the plurality of TAU DRX periods are adjacent a time difference between the TAU DRX periods is less than the TAT; a transmitting unit, connected to the extended DRX cycle setting unit and the TAU DRX period setting unit, for transmitting a sounding reference signal SRS according to a setting of a TAU DRX period; And a synchronization unit, coupled to the transmitting unit, for waking up from the DRX state during each TAU DRX period, thereby receiving a timing advance TA command from the base station to maintain uplink synchronization.

Yet another aspect provides a user equipment, including: extended discontinuous reception

a DRX cycle setting unit, configured to set an extended DRX cycle, where the extended DRX cycle includes a plurality of extended DRX periods, and each of the plurality of DRX periods is greater than or equal to a timing advance timer of the user equipment a TAT maintenance unit, connected to the extended DRX cycle setting unit, for maintaining a first TAT of the user equipment, to send a sounding reference signal SRS to the base station at a third predetermined time before the first TAT timeout; a synchronization unit, connected to the TAT maintenance unit, for entering a timing advance amount update TAU DRX period after a fourth predetermined time after transmitting the SRS, to stay awake from the DRX state during the active time of the TAU DRX period, thereby The base station receives the timing advance TA command to maintain uplink synchronization; and a TAT reset unit is coupled to the uplink synchronization unit for resetting the first TAT upon successful decoding of the TA command.

In another aspect, a base station is provided, including: a receiving unit, configured to receive a sounding reference signal SRS sent from the user equipment; a maintenance and judgment unit, connected to the receiving unit, for maintaining a second timing advance timer TAT of the user equipment, and referring to the second TAT determination Whether the SRS is a sounding reference signal SRS sent by the user equipment at a third predetermined time before the second TAT timeout; an uplink synchronization unit, connected to the maintenance and determination unit, for determining that the SRS is In the case that the user equipment sends the sounding reference signal SRS sent by the third predetermined time before the second TAT timeout, the timing advance amount TA is sent to the user equipment for a fourth predetermined time after receiving the SRS to make The user terminal maintains uplink synchronization; and a TAT reset unit, connected to the uplink synchronization unit, for receiving a TA command sent from the user equipment for a fifth predetermined time after the user equipment successfully decodes the TA command After the response, the second TAT of the maintenance is reset, where the second TAT time length of the base station side is longer than the time of the first TAT of the user equipment side. Less fifth predetermined time.

In another aspect, a base station is provided, including: a receiving unit, configured to receive a sounding reference signal SRS sent by a user equipment; and an uplink synchronization unit, connected to the receiving unit, for receiving, sent by the user equipment The timing advance TA command is transmitted for a fourth predetermined time after the arbitrary SRS or the SRS having the specific identity, so that the user equipment maintains the uplink synchronization.

Through the hybrid discontinuous reception method and the base station and the user equipment, the active time of the extended DRX cycle can be matched with the periodic service characteristics of the user equipment, so as to ensure that the user equipment is in the DRX in the time when no service occurs. In the state, to achieve the effect of power saving. Moreover, by setting the user equipment to enter the TAU DRX period before the TAT timeout, thereby receiving the TA command from the base station during the active time of the TAU DRX period, the uplink synchronization of the user equipment can be maintained at all times. DRAWINGS

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings to be used in the embodiments or the description of the prior art will be briefly described below. Obviously, the drawings in the following description are only the present invention. For some embodiments, other drawings may be obtained from those of ordinary skill in the art without departing from the drawings.

1 is a schematic diagram of a two-stage DRX process generally employed in the LTE/LTE-A standard; FIG. 2 is a flowchart showing a hybrid discontinuous reception method according to a first embodiment of the present invention; Schematic diagram of each DRX period in an extended DRX cycle of an embodiment; 4 is a schematic diagram of an example of a TAU DRX period mode according to a first embodiment of the present invention; FIG. 5 is a schematic diagram of another example of a TAU DRX period mode according to the first embodiment of the present invention;

6 is a flowchart of a hybrid discontinuous reception method according to a second embodiment of the present invention; FIG. 7 is a flowchart of a hybrid discontinuous reception method according to a third embodiment of the present invention; FIG. 8 is a third embodiment of the present invention. Schematic diagram of the TAU DRX period;

9 is a flowchart of a hybrid discontinuous reception method according to a fourth embodiment of the present invention; FIG. 10 is a flowchart of a hybrid discontinuous reception method according to a fifth embodiment of the present invention; and FIG. 11 is a diagram according to an embodiment of the present invention. Schematic block diagram of a base station of a hybrid DRX method; FIG. 12 is a schematic block diagram of a user equipment employing a hybrid DRX method according to an embodiment of the present invention;

Figure 13 is a schematic block diagram of another user equipment employing a hybrid DRX method in accordance with an embodiment of the present invention;

Figure 14 is a schematic block diagram of another base station employing a hybrid DRX method in accordance with an embodiment of the present invention;

Figure 15 is a schematic block diagram of yet another base station employing a hybrid DRX method in accordance with an embodiment of the present invention. detailed description

The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without making creative labor are within the scope of the present invention.

Below, we will first introduce the usual DRX cycle settings in the LTD standard.

In the LTE standard, the DRX employed is a combination of a short DRX cycle and a long DRX cycle. The UE configures the DRX function through RRC to shut down most of the transmitting and receiving systems for a predefined period of time. The DRX operation consists of a long DRX cycle, a DRX inactivity timer, a DRX HARQ RTT timer (DRX HARQ (hybrid automatic repeat-request) RTT (round trip time: Loop delay) timer ), DRX retransmission timer (DRX retransmission timer) and optional short DRX The cycle (Short DRX Cycle) and the DRX Short Cycle Timer (Short DRX Cycle timer) are combined.

In the LTE standard, the parameters of the DRX state mainly include:

Duration ( ₀ n-duration ): The UE wakes up from the DRX state. During the time interval of waiting to receive the PDCCH downlink subframe, if the UE successfully decodes a PDCCH, the UE remains awake and starts the "inactivity timer" (inactivity- Timer ) ". If the UE does not detect the PDCCH within the on-duration time interval, the UE directly enters a sleep state.

Inactivity-timer (inactivity-timer): The time interval after the UE successfully decodes the PDCCH after the last successful decoding of the PDCCH, and if the decoding fails, the UE re-enters the DRX. The UE restarts the inactivity timer only after successfully decoding the first transmitted PDCCH (i.e., does not restart for retransmission).

Active-time: The total time interval in which the UE is in the awake state. Including the "on-duration" of the DRX cycle, the time during which the UE performs continuous reception before the "inactivity-timer" timeout, and the time when the UE waits for downlink retransmission after the HARQ RTT to perform continuous reception. . Based on the above, the minimum "activity time" is equal to "duration" and there is no limit on the maximum time.

In the above parameters, the lengths of "duration" and "inactivity timer" are usually fixed, and the length of "active time" depends on the scheduling decision of the UE and whether the UE is successfully decoded.

Figure 1 is a schematic diagram of a two-level DRX process commonly employed in the LTE/LTE-A standard. As shown in FIG. 1, if the UE successfully decodes the first transmitted PDCCH, it maintains the "awake" state and starts the "inactive timer" until the "inactivity timer" expires or the UE receives the MAC that re-enters the DRX state ( Media access control: Control message. In the above two cases, after the UE re-enters the DRX state, if the short DRX cycle is configured, the UE first follows the short DRX cycle. After the short DRX cycle timer expires, the UE follows the long DRX cycle; otherwise, the UE directly follows the long DRX cycle. cycle.

In the LTE/LTE-A standard, in order to maintain mobility, for all UEs in the RRC connected state, the eNB (evolved node base station) always maintains the uplink synchronization of layer 1, so that it is from multiple UEs. The signal can arrive at the eNB receive window simultaneously. To do this, two processes are defined to keep them in sync:

When non-synchronous, the UE→RACH (ran access channel) process is adopted; When synchronizing, the UE→SRS (sounding reference signal) process is used.

When the UE has not established the uplink synchronization, the UE uses the RACH procedure to obtain the TA (Time Alignment) through the configuration of the PRACH (physical ran access channel) channel; when the UE has established synchronization, the eNB The TA may be calculated according to the data on the SRS or the physical uplink share channel (PU) channel sent by the UE, and the TA is periodically sent to the UE, so that the UE can always maintain the uplink synchronization, and the eNB uses the MAC control unit to the UE. The form sends an additional MAC time advance command with the MAC payload, ie the TA command.

A timer TA alignment timer is set in the UE to detect whether a timing advance is required, that is, before the TAT times out, the UE considers that the uplink synchronization is always maintained, and when After receiving the TA command, the UE restarts the TAT. If the TAT times out, the UE needs to regain the timing advance of the uplink synchronization through the RACH process. In general, the time set by the TAT is greater than the period of the DRX. The UE can only send the SRS during the active time of the DRX, and receive the TA command to restart the TAT. This basically guarantees the DRX sleep time, because no data and SRS are sent. Can always maintain uplink synchronization.

In the design of the above-mentioned two-level DRX process, the application is mainly for the time when the data is sent and received irregularly, the data packet size is irregular, and even the longest DRX cycle setting is only 2 to 3 seconds. This is to ensure that the data transmission delay is not too large, otherwise it will affect the user experience. For the MTC application scenario, the UE may send and receive data with obvious periodicity (the period may be several tens of seconds, several minutes, several tens of minutes, etc.), and the amount of data sent and received is small each time. In addition, the UE does not have high requirements for data transmission delay. For such an application scenario, the above-mentioned two-level DRX process may cause the UE to wake up without the need to send and receive data, which is not conducive to power saving.

Based on the above problem, an embodiment of the present invention provides a hybrid discontinuous reception DRX method for a base station and a user equipment, which can set a mixed DRX cycle for a service cycle characteristic of a user equipment, and can achieve maximum power saving while being able to achieve maximum power consumption. Keep the upstream synchronization of the user equipment.

2 is a flow chart showing a hybrid discontinuous reception method according to a first embodiment of the present invention. As shown in FIG. 2, the hybrid discontinuous reception method 10 according to the first embodiment of the present invention is implemented by a base station, and includes: 101: configuring an extended discontinuous reception DRX cycle mode, wherein, in the extended DRX cycle mode Configuring an extended DRX cycle, where the extended DRX cycle includes multiple The extended DRX period, the extended DRX period of the plurality of extended DRX periods is greater than or equal to the timing advance timer TAT of the user equipment; 102, configuring the timing advance amount to update the TAU DRX period mode, where In the TAU DRX period mode, a plurality of TAU DRX periods are configured, in the extended DRX period, at the beginning of the first DRX period of the plurality of extended DRX periods or after the start is less than the number of the TAT a first time TAU DRX of the plurality of TAU DRX periods is configured for a predetermined time, and a time difference between any two adjacent TAU DRX periods of the plurality of TAU DRX periods is less than the TAT; Transmitting the extended DRX cycle mode and the TAU DRX period mode to the user equipment; 104, transmitting a timing advance TA command after receiving the sounding reference signal SRS sent by the user equipment for a second predetermined time.

In the above embodiment, the extended DRX cycle mode and the TAU DRX time zone mode are configured by the base station and sent to the user equipment, so that the user equipment can set its own extended DRX according to the extended DRX cycle mode and the TAU DRX time zone mode. Period and TAU DRX period. In this way, the user equipment can enter the DRX state or wake up from the DRX state according to the extended DRX cycle. The length of the extended DRX period matches the periodic service characteristics of the UE, and the active time of the extended DRX period corresponds to the periodic service occurrence time of the user equipment, and the user may Wake up in the DRX state, keep "awake, state" to perform the periodic service, and in the case of no periodic service, that is, in the idle time between any two periodic service occurrences, try to ensure entry The DRX state is thus in a "sleep" state. In this way, the user equipment can be guaranteed to be in a "sleep" state for a period of time when no traffic occurs, thereby achieving the effect of power saving. And, due to the time of the extended DRX cycle described above. Longer, during which the user equipment's TA is likely to have changed so that the user equipment is difficult to maintain uplink synchronization at all times. Therefore, by setting multiple TAU DRX periods, the user equipment is in the active time of each TAU DRX period. Keep waking up from the DRX state, the user equipment can be in the TAU DRX period above TA command received from the base station within a fixed time so that uplink synchronization is always maintained throughout the extended DRX cycle.

As described above, it is mentioned that for the MTC application scenario, the amount of data that the user equipment transmits and receives each time is small, and therefore, in the embodiment of the present invention, the extended DRX cycle mode can be configured accordingly.

3 is a schematic diagram of each DRX period in an extended DRX cycle in accordance with a first embodiment of the present invention. As shown in FIG. 3, the DRX period of the embodiment of the present invention mainly includes the length of the DRX period, and holds On-duration, HARQ RTT timer, HARQ retransmission timer. In an embodiment of the invention, as shown in FIG. 3, the DRX parameter does not include an inactivity-timer. In the prior art, the UE wakes up to receive the PDCCH at the on-duration time of the DRX. As long as the PDCCH of the first transmission is correctly decoded, the UE starts the inactivity-timer and enters the continuous receiving state until the inactivity-timer and the HARQ retransmission timer ^ After the timeout, the UE ends the active time and enters the DRX sleep state. In the embodiment of the present invention, the inactivity timer is not included in the DRX period, but is continuously received only in the duration of the duration. As long as one PDCCH is received and NACK (negative acknowledgement) is fed back, the UE starts immediately. The HARQ RTT timer starts the HARQ retransmission timer after it times out. When the HARQ retransmission timer expires, it goes to sleep.

In this way, by removing the inactivity timer from the DRX period, the length of time during which the user equipment is in the DRX cycle can be shortened, thereby ensuring that the user equipment is in a maximum sleep state to save power.

Of course, those skilled in the art can understand that, according to specific operational requirements, the length of the inactivity timer can also be shortened in the DRX period instead of directly removing the inactivity timer. In addition, the inactivity timer can be removed in some DRX periods while the inactivity timer is retained in other DRX periods. The embodiments of the present invention are not intended to impose any limitation on this.

In addition, in the embodiment of the present invention, the TAU DRX period may also have a setting as shown in FIG. 3, that is, in the TAU DRX period, mainly including a TAU DRX period length, an on-duration, and a HARQ RTT timer. , HARQ retransmission timer. That is to say, in a certain sense, the TAU DRX period in the embodiment of the present invention is a DRX period only for receiving a TA command by the user equipment, and the parameter type included therein is the same as the parameter type included in the extended DRX period. , but the parameter size settings are different. As with the extended DRX period, the TAU DRX period of the embodiment of the present invention does not include an inactivity timer, but also includes other time parameters, such as an on-duration, a HARQ RTT timer, a HARQ retransmission timer, and the like. Preferably, in the TAUDRX period of the embodiment of the present invention, the time length of other time parameters may be the same as that of the extended DRX period except for the length of time of the duration. In the extended DRX cycle of the embodiment of the present invention, the active time of the DRX period is mainly used to receive downlink data, and the active time of the TAU DRX period is mainly used to receive the TA command, so compared to the DRX period, at the TAU DRX The amount of data received during the time period is smaller, and the length of the active time of the TAU DRX period can be set to be less than the length of the active time of the DRX period, that is, TAU DRX The length of time of the duration of the segment is less than the length of time of the duration of the extended DRX period. As described previously, in an embodiment of the present invention, for example, the base station transmits the configured extended DRX cycle mode and TAU DRX time zone mode to the user equipment through RRC dedicated signaling.

Moreover, those skilled in the art will appreciate that in embodiments of the present invention, when the user equipment is at the active time of the DRX, the user equipment has woken up from the DRX state and there is data and signal interaction with the base station. At this time, when the user equipment enters the active time of the TAU DRX period, its state does not change any more. Therefore, it can be considered that the TAU DRX period at this time does not have any effect and can be ignored. That is to say, in this case, it is not necessary to set various time parameters of the TAU DRX period, such as duration, HARQ RTT timer, HARQ retransmission timer, etc., and the user equipment is not required to be sent before its start time. SRS.

It will be understood by those skilled in the art that in the above description of the embodiments of the present invention and the following description, the time of any TAU DRX period generally refers to the start time of the active time of the TAU DRX period, that is, the start time of the TAU DRX period. Of course, in some cases, other times may also be employed, such as the end time of the active time of the TAU DRX period or the end time of the on-duration time of the active time of the TAU DRX period, etc., and embodiments of the present invention are not intended to be This is subject to any restrictions.

It can be understood by those skilled in the art that the hybrid DRX method of the embodiment of the present invention can be directed to the periodic service characteristics of the MTC described above, but is not limited to the application scenario applied to the MTC class. The hybrid DRX method of the embodiment of the present invention can also be applied to other application scenarios with periodic service characteristics, thereby obtaining maximum power saving while maintaining uplink synchronization of the user equipment by setting the extended DRX cycle and the TAU DRX period. effect.

It can be understood by those skilled in the art that, in the configuration of the TAU DRX period mode of the foregoing embodiment, the time of configuring the first TAU DRX period can be guaranteed at the beginning of the first DRX period or after the start of the first predetermined time less than the TAT. The user equipment does not lose uplink synchronization before the first TAU DRX period, that is, ensures that the user equipment can maintain uplink synchronization before reaching the first TAU DRX period after entering the extended DRX cycle to receive the TA command. Furthermore, by configuring a time difference d between any two adjacent TAU DRX periods of the plurality of TAU DRX periods, at TAT, the user equipment can be maintained for a time between any two adjacent TAU DRX periods. Uplink synchronization.

In the above embodiment, only the time difference between the first TAU DRX period in the configured TAU DRX period mode and the start time of the first DRX period and any two adjacent TAUs are defined. The time difference between the DRX periods should be less than the TAT, which is also the most basic condition for the TAU DRX period setting of the embodiment of the present invention. On this basis, the setting of the TAU DRX period according to an embodiment of the present invention can be further defined. Preferably, in the embodiment of the present invention, in the TAU DRX period mode, the configuration of the TAU DRX period in each extended DRX period is the same. That is, in each DRX period of the extended DRX cycle, the setting of the TAU DRX period is repeated in the same manner as the setting of the TAU DRX period in the first DRX period, so that in each DRX period, the TAU DRX period The settings are periodic. For example, assume that the length of each DRX period is 20 subframes, and the length of the TAT is 10 subframes. At this time, if the TAU DRX period is set in the first, sixth, fifteenth, and nineteenth subframes of the first DRX period in the first DRX period, then in each of the following DRX periods, The TAU DRX period is set to the first, sixth, fifteenth, and nineteenth subframes of the DRX period. Thus, by causing the setting of the TAU DRX period to be periodically repeated in units of each DRX period, the time that the user equipment wakes up from the DRX state can be made more regular, thereby facilitating the user's operation. At the same time, the configuration of the TAU DRX period mode of the base station can also be more regular, thereby facilitating the configuration of the base station.

Additionally, in an embodiment of the present invention, in the extended DRX cycle or the extended

The TAU DRX period in each DRX period of the DRX cycle may be periodic. That is, in the case where the TAU DRX period is configured to be periodic in the extended DRX cycle, the TAU DRX period itself is periodic, and may be independent of the period of the DRX period. For example, assuming that each DRX period has a length of 20 subframes and a TAT has a length of 10 subframes, the period of the TAU DRX period can be configured to be 6 subframes, that is, if the first TAU DRX period is in the first DRX period. 1st subframe, then the second TAU DRX period is in the 7th subframe, the third TAU DRX period is in the 13th subframe, the fourth TAU DRX period is in the 19th subframe, and the fifth TAU DRX period is in the The 5th subframe of the two DRX periods, the sixth TAU DRX period is in the 11th subframe of the second DRX period, and so on. Thus, by setting the TAU DRX period itself to be periodic, the time that the user equipment wakes up from the DRX state can be made more regular, thereby facilitating the user's operation. At the same time, the configuration of the TAU DRX period mode of the base station can be more regular, thereby facilitating the configuration of the base station.

Further, in a case where the TAU DRX period is configured to be periodic in each DRX period of the extended DRX cycle, it is preferentially ensured that the setting of the TAU DRX period is the same in each DRX period, and additionally guaranteed in each DRX period The setting of the TAU DRX period is also periodic. For example, suppose the length of each DRX period is 20 subframes, and the length of the TAT is 10 sub-frames. frame. At this time, if the period of the TAU DRX period is set to 6 subframes in each DRX period, then, in the first DRX period, the TAU DRX period may be set in the first, seventh, and the first DRX period. The thirteenth and nineteenth subframes. And in each of the following DRX periods, the TAU DRX period is set in the first, seventh, thirteenth, and nineteenth subframes of the DRX period. Also, such an arrangement may make the user device wake up from the DRX state more regularly, thereby facilitating the user's operation. At the same time, the configuration of the TAU DRX period mode of the base station can also be more regular, thereby facilitating the configuration of the base station.

As described above, in the configuration process of the TAU DRX period mode, it is necessary to ensure the time difference between the first TAU DRX period in the TAU DRX period mode and the start time of the first DRX period and any two adjacent TAU DRX periods. The time difference between the two is less than the TAT. If the condition is met, other arrangements may be considered by those skilled in the art, and the embodiments of the present invention are not intended to limit the same. Moreover, the setting manner of each TAU DRX period of the foregoing user equipment is corresponding to the TAU DRX period mode configured by a certain base station, and details are not described herein again.

As described above, in the configured TAU DRX period mode, since in each TAU DRX period, the user equipment wakes up from the DRX state in the active time of the TAU DRX period to receive the TA command, therefore, in order to secure the user The device wakes up from the DRX state at a predetermined time and needs to be able to locate the start time of the activity time for each TAU DRX period. That is, it is necessary to be able to determine the start time of the activity time of each TAU DRX period according to the configuration of the above TAU DRX period mode. Regarding other time parameters in the TAU DRX period, the on-duraiton time, the HARQ RTT timer, the HART retransmission timer, and the like as shown in FIG. 3 are set in the same manner as the DRX cycle in the prior art, and thus Let me repeat.

When determining the start time of the active time of each TAU DRX period according to the configuration of the TAU DRX period mode, the following two cases may be included: First, the TAU DRX period mode may be configured to include the plurality of TAU DRX periods The start time of the activity time of each TAU DRX period, such that since the parameter indicating the start time of the activity time of each TAU DRX period has been configured in the TAU DRX period mode, it is determined that the user equipment enters each TAU DRX a start time of the activity time of the time period; further, the TAU DRX time period mode may be configured to include a time when the user equipment corresponding to each of the plurality of TAU DRX periods transmits the SRS, and A case is described in detail.

In the first embodiment of the present invention, the base station receives the sounding reference signal sent by the user equipment.

In SRS, a TA command is sent to the user equipment after a predetermined time, for example, 1 subframe, and the Often, the predetermined time is fixed. In the first embodiment of the present invention, the second predetermined time refers to the time from when the base station receives the SRS sent by the user equipment to the time when the TA command is sent. Therefore, by limiting the time at which the user equipment transmits the SRS, the time at which the base station transmits the TA command is also limited. Those skilled in the art can understand that since the user equipment maintains the uplink synchronization by receiving the TA command, the user equipment is required to wake up from the DRX state when the base station transmits the TA command, in order to receive the TA command from the base station. Therefore, by configuring the time at which the user equipment corresponding to each TAU DRX period transmits the SRS in the TAU DRX period mode, the start time of the activity time of the user equipment entering each TAU DRX period can also be determined.

In the embodiment of the present invention, as described above, the base station calculates the TA according to the data on the SRS or PUSCH channel sent by the user equipment, that is, the base station needs to calculate the TA according to some information carried in the SRS. Here, those skilled in the art can understand that, in addition to the SRS, the base station can also calculate the TA according to other information in the signal carrying the information for calculating the TA, and the embodiment of the present invention is not intended to limit this.

Also, for the base station, the TA command is not sent whenever a signal from the user equipment carrying the data for calculating the TA is received. However, since in the embodiment of the present invention, the user equipment is in the DRX sleep state most of the time, there is no arbitrary signal from the user equipment at this time, so when the base station receives the SRS or other signal, it will know that this is A signal for requesting a TA command to calculate a TA and send a TA command based on information in the SRS or other signals. Or, since the TAU DRX period mode is configured at the base station, the base station itself also knows what the TAU DRX period mode is. Therefore, the base station can also know that the SRS or other signal sent at some time is a signal for requesting the TA command according to the configured TAU DRX period mode, so that the TA command is sent to the user equipment after the second predetermined time.

In the above description, the signal transmission delay between the base station and the user equipment is not considered, that is, the time when the user equipment transmits a certain signal and the time when the base station receives the signal are the same time, and the time when the base station transmits a certain signal and the user equipment The time to receive the signal is also the same time. However, those skilled in the art can easily apply the method of the embodiment of the present invention to the case of having a signal delay. For example, if the signal delay between the base station and the user equipment is T, the base station should send the SRS after the user equipment sends the SRS. The TA command is sent after the second predetermined time +T, and the user equipment should enter the TAU DRX period within T time after the base station transmits the TA command.

Hereinafter, an example of a TAU DRX period mode according to an embodiment of the present invention will be described with reference to FIGS. 4 and 5. 4 is a schematic diagram of an example of a TAU DRX period mode according to a first embodiment of the present invention. As described above, the TAU DRX time period mode may include parameters: which consecutive subframes the active time of each TAU DRX period is located, the length of time of each TAU DRX's active time, and the like. Among them, according to an embodiment of the present invention, the most important parameter is which subframe the start time of the active time of each TAU DRX period is located on. As shown in FIG. 4, in one extended DRX cycle shown, two TAU DRX periods are set, and the start time of the active time of each TAU DRX period is set to be the start of the active time of the extended DRX cycle. Time offsets several subframes. The base station sends the foregoing DRX cycle mode and the TAU DRX time zone mode to the user equipment by using the RRC dedicated signaling, and the user equipment receives the extended DRX cycle mode and the TAU DRX time zone mode, and sets the extended DRX cycle as shown in FIG. 4 and During the TAU DRX period, the SRS is transmitted in the Xth uplink subframe before the start of the active time of the TAU DRX, and wakes up during the active time to receive the TA command. It can be understood by those skilled in the art that in FIG. 4, it can also be defined in which subframe the start time of the active time of the TAU DRX is, and for several subframes, and so on.

Fig. 5 is a schematic diagram of another example of a TAU DRX period mode according to the first embodiment of the present invention. As shown in FIG. 5, in this example, the mode in which the user equipment transmits the SRS in the extended DRX period, that is, the start time of the active time of the DRX period in which the time interval extended by the UE transmitting the SRS is defined is offset by several subframes. Similarly, the base station sends the foregoing DRX periodic mode and the TAU DRX period mode to the user equipment by using RRC dedicated signaling, and the user equipment receives the extended DRX period and the TAU DRX period mode, and sets an extended DRX cycle as shown in FIG. 5 and During the TAU DRX period, and transmitting the SRS according to the set time of the TAU DRX period, the base station sends a TA command in the Xth downlink subframe after receiving the SRS, and the UE also wakes up in the Xth downlink subframe after the SRS is sent. To enter the TAU DRX period. Similarly, those skilled in the art can understand that in FIG. 5, it can also be defined in which uplink subframe the user equipment transmits the SRS.

Figure 6 is a flow chart of a hybrid discontinuous reception method in accordance with a second embodiment of the present invention. As shown in FIG. 6, the hybrid discontinuous reception method 20 according to the second embodiment of the present invention is implemented by a user equipment, and includes: 201. Receive an extended discontinuous reception DRX cycle mode and a timing advance update TAU DRX period mode from a base station. 202. Set an extended DRX cycle of the user equipment according to the extended DRX cycle mode, where the extended DRX cycle includes multiple extended DRX periods, each of the multiple extended DRX periods The DRX period is greater than or equal to the timing advance timer TAT of the user equipment; 203, setting a plurality of TAU DRX periods of the user equipment according to the TAU DRX period mode, where, in the extended DRX period, The first TAU DRX period of the plurality of TAU DRX periods is set at the beginning of the first DRX period in the extended DRX period or at a first predetermined time less than the TAT, and the plurality of TAUs a time difference between any two adjacent TAU DRX periods in the DRX period is less than the TAT; 204, transmitting a sounding reference signal SRS according to the setting of the plurality of TAU DRX periods; and 205, in the plurality of TAU DRX Each TAU DRX period in the period remains awake from the DRX state, and a timing advance TA command is received from the base station to maintain uplink synchronization.

With the hybrid DRX method according to the second embodiment of the present invention described above, the user equipment can enter or wake up from the DRX state according to the extended DRX cycle. The length of the extended DRX period matches the periodic service characteristics of the UE, and the active time of the extended DRX period corresponds to the periodic service occurrence time of the user equipment, and the user may Wake up in the DRX state, maintain the "awake" state to perform the periodic service, and in the case of no periodic service, that is, in the idle time between any two periodic service occurrences, try to enter the DRX State, thus in a "sleep" state. In this way, the user equipment can be guaranteed to be in a "sleep" state for a period of time when no service occurs, thereby achieving the effect of power saving. Moreover, since the extended DRX cycle takes a long time, the TA of the user equipment is likely to have changed during this time, so that it is difficult for the user equipment to always maintain uplink synchronization. Therefore, by setting multiple TAU DRX periods, the user equipment is made. Staying awake from the DRX state during the active time of each TAU DRX period, the user equipment can receive the TA command from the base station during the active time of the TAU DRX period described above to maintain uplink synchronization throughout the extended DRX cycle.

As in the above description in the hybrid DRX method according to the first embodiment of the present invention, in the hybrid DRX method according to the second embodiment of the present invention, in the TAU DRX period mode, the TAU in each extended DRX period The configuration of the DRX period can be the same. In this way, the setting of the TAU DRX on the user equipment side can be made more regular, thereby facilitating the operation of the user equipment.

As in the above description of the hybrid DRX method according to the first embodiment of the present invention, in the hybrid DRX method according to the second embodiment of the present invention, it may be set in the extended DRX cycle or the extended DRX cycle The TAU DRX period in each DRX period is periodic. In this way, the setting of the TAU DRX on the user equipment side can be made more regular, thereby facilitating the operation of the user equipment.

Same as described above in the hybrid DRX method according to the first embodiment of the present invention, in accordance with In the hybrid DRX method of the second embodiment of the present invention, the start time of the activity time of each TAU DRX period is included in the TAU DRX period mode, and the user equipment is before the start time of the activity time of each TAU DRX period according to the above parameters. The second predetermined time is sent to the SRS. Here, it is assumed that the time between receiving the SRS signal and transmitting the TA command by the base station is a second predetermined time, so that it can be ensured that when the base station sends a TA command to the user equipment, the user equipment has entered the TAU DRX period and is in the DRX state. wake up.

In the hybrid DRX method according to the second embodiment of the present invention, the TAU DRX period mode includes the user equipment corresponding to each TAU DRX period transmitting the SRS, as described in the hybrid DRX method according to the first embodiment of the present invention. Time, in this way, the user equipment can transmit the SRS at the time indicated by the above parameters and wake up from the DRX state at the second predetermined time after the time of transmitting the SRS, thereby receiving the timing advance TA command from the base station to maintain the uplink synchronization. Also, it is assumed here that the time between the reception of the SRS signal and the transmission of the TA command by the base station is a second predetermined time, thereby ensuring that when the base station transmits a TA command to the user equipment, the user equipment has entered the TAU DRX period and wakes up from the DRX state. .

As in the above description in the hybrid DRX method according to the first embodiment of the present invention, in the hybrid DRX method according to the second embodiment of the present invention, it is not included in the active time of setting each extended DRX period in the extended DRX cycle. Inactivity timer. In addition, the setting of the TAU DRX period is similar to the DRX period, excluding the inactivity timer, and other parameters such as On-duration time, HARQ RTT timer and HARQ retransmission timer are configured in the DRX cycle of the prior art. Similar.

The hybrid DRX method according to the second embodiment of the present invention described above corresponds to the hybrid DRX method according to the first embodiment of the present invention described above, and the content described with respect to the hybrid DRX method according to the first embodiment of the present invention may be the same. The present invention is applied to the hybrid DRX method according to the second embodiment of the present invention, and therefore will not be described again here.

Figure 7 is a flow chart of a hybrid discontinuous reception method in accordance with a third embodiment of the present invention. As shown in FIG. 7, the hybrid discontinuous reception method 30 according to the third embodiment of the present invention is implemented by a user equipment, and includes: 301. Set an extended discontinuous reception DRX cycle, where the extended DRX cycle includes multiple An extended DRX period, each extended DRX period of the plurality of extended DRX periods being greater than or equal to a timing advance timer TAT of the user equipment; 302, maintaining the first TAT of the user equipment to be at the first Sending a sounding reference signal SRS to the base station at a third predetermined time before the TAT timeout; 303, entering the timing advance amount update TAU after the fourth predetermined time after transmitting the SRS The DRX period, staying awake from the DRX state during the active time of the TAU DRX period, and receiving the timing advance TA command from the base station to maintain uplink synchronization; and 304, resetting the first when the TA command is successfully decoded A TAT.

The hybrid DRX method 30 according to the third embodiment of the present invention is different from the hybrid DRX method 20 according to the second embodiment of the present invention described above in that the hybrid DRX method 30 does not configure a fixed extended DRX cycle mode and In the TAU DRX time slot mode, the timeout of the first TAT is monitored on the user equipment side, and the uplink synchronization process of the user equipment is completed before the first TAT timeout, so that the uplink synchronization of the user equipment is always maintained. Here, the first TAT refers to the TAT maintained on the user equipment side.

As in the first and second embodiments described above, the user equipment can enter or wake up from the DRX state according to the extended DRX cycle. The length of the extended DRX period matches the periodic service characteristics of the UE, and the active time of the extended DRX period corresponds to the periodic service occurrence time of the user equipment, and the user can obtain the DRX from the DRX when the periodic service occurs. Wake up in the state, maintain the "awake" state to perform the periodic service, and ensure that the DRX state is entered in the idle time between any two periodic service occurrences without the occurrence of periodic services. , thus being in a "sleep" state. In this way, it is possible to ensure that the user equipment is in a "sleep" state during the time when no service occurs, thereby achieving the effect of power saving. Moreover, since the time of the extended DRX cycle is long, the TA of the user equipment is likely to have changed during this time, so that it is difficult for the user equipment to always maintain uplink synchronization. Therefore, whether the first TAT is timed out by the user equipment is monitored, and The predetermined time before the timeout enters the TAU DRX period, which may cause the user equipment to stay awake from the DRX state during the active time of each TAU DRX period, receive the TA command from the base station to maintain the uplink throughout the extended DRX cycle. Synchronize.

In the hybrid DRX method according to the third embodiment of the present invention described above, the UE can flexibly select the time to enter the TAU DRX according to the time of the TAT. That is, the start time of the TAU DRX's active time depends on the remaining time of the current TAT. It can be avoided that in the fixed TAU DRX time mode, the UE sends the SRS at a certain time to request the TA command. At this time, the first TAT may just restart, and the TA is not necessary yet. In this way, the operation of the user equipment to maintain the uplink synchronization can be optimized, thereby reducing the burden on the user equipment and further achieving the power saving effect.

Moreover, those skilled in the art can understand that, in order to further achieve the purpose of power saving, as described above in relation to the hybrid DRX method according to the first and second embodiments of the present invention, an expansion may be set. The inactivity timer is not included in each DRX period of the extended DRX cycle, and the inactivity timer is not included in each TAU DRX period, and other parameters in the DRX period and the TAU DRX period may be related to the prior art. Similar settings in the DRX cycle.

Since the user equipment needs to complete the uplink synchronization before the TAT times out, the TAT is maintained on the user equipment side so that the user equipment knows when the TAT times out. And, the third predetermined time here should be equal to the sum of the time after the base station receives the SRS until the time when the TA command is transmitted and the time when the user equipment receives the TA command and completes the uplink synchronization process. That is, as described in the first and second embodiments of the present invention, the third predetermined time should be equal to the time at which the base station receives the SRS until the TA command is transmitted (ie, the fourth predetermined time) plus the TAU DRX period. Activity time.

Similarly, those skilled in the art can understand that, in consideration of the transmission delay of the signal, the third predetermined time should also add the transmission delay of the SRS from the user equipment side to the base station side and from the base station side to the user equipment side. The transmission delay of the TA command ensures that the user equipment can complete the uplink synchronization process before the TAT times out.

In the hybrid DRX method described above, the TA command response is transmitted to the base station for a fifth predetermined time after entering the start time of the active time of the TAU DRX period.

Here, as described above, if the uplink synchronization of the user equipment is to be maintained, in addition to ensuring that the user equipment transmits the SRS or other signals for requesting the TA command at the third predetermined time before the TAT expires, it is also necessary to ensure that the base station is receiving. The TA command is sent at a fourth predetermined time after the signal. According to the foregoing description, since the base station does not send a TA command whenever receiving a signal such as an SRS from the user equipment, the base station needs to be able to know that the SRS signal sent by the user equipment at the third predetermined time before the TAT timeout is Used to request a TA command. In order to solve this problem, there are several ways.

First, the second TAT of the user equipment may also be maintained on the base station side, so that when the user equipment sends the SRS for a third predetermined time before the first TAT expires, the base station may know the second TAT according to the maintained user equipment. The SRS is a signal for requesting a TA command. However, since the user equipment resets the first TAT when the TA command is successfully decoded to complete the uplink synchronization, the user equipment also needs to notify the base station of the reset of the first TAT so that the base station side updates the maintained user equipment. The second TAT. Based on this, the user equipment transmits a TA command response to the base station for a fifth predetermined time after the start time of the active time entering the TAU DRX period. Here, when it is assumed that the time when the user equipment successfully decodes the TA command to complete the uplink synchronization is negligible, the second TAT time length of the user equipment maintained by the base station side is smaller than the first TAT time length of the user equipment side. Fifth scheduled time. Here, for the sake of distinction, the TATs on the user equipment side and the base station side are referred to as a first TAT and a second TAT, respectively, but those skilled in the art can understand that both are timing advance timers involving the same user equipment.

Figure 8 is a diagram showing a TAU DRX period in accordance with a third embodiment of the present invention. As shown in Figure 8, the TAT of the UE is maintained on both sides of the base station and the UE. That is, both the base station and the UE know the running status of the TAT. The UE is configured to send an SRS in the Xth uplink subframe before the TAT timeout. The base station knows that the SRS sent by the UE is used to request the TA command, that is, the TA command is sent in the Yth downlink subframe after the UE sends the SRS. The active time of the TAU DRX starts from this downlink subframe, and the UE enters a sleep state after the TAU DRX activity time ends, until the next time the UE triggers the SRS request TA command to wake up and enters a TAU DRX cycle again. After the UE correctly decodes the TA command, the TAT of the UE side is reset, and after the m subframes, the TA command is sent back to the base station, and the base station receives the TAT after receiving the base station side, so that the TAT time length of the base station side is longer than the time of the UE side. The length is less than m subframes.

Since the TAT is maintained on both sides of the base station and the user equipment in the above embodiment, the configuration of the system is more complicated. Moreover, the TAT maintained on both sides of the base station and the user equipment are consistent, and the same meaning here means that the TATs on both sides time out at the same time.

In order to reduce the complexity of the system, the above hybrid DRX method can be optimized. For example, only the UE maintains its own TAT, and the base station does not require maintenance. As described above, in order to ensure that the base station can know that the signal is a signal for requesting a TA command to send a TA command to the user equipment when receiving a signal for requesting a TA command, such as an SRS, the base station can adopt the following two methods.

First, the base station can be set to feed back the TA command after the second predetermined time, for example, the Y subframe, after receiving the SRS transmitted during the extended DRX period, thereby ensuring that the user equipment can receive the TA command before the TAT expires. For upstream synchronization. Alternatively, the SRS that is sent by the UE to request the TA command between the extended DRX cycles may be an SRS with a special identifier or a specific classification, so that the base station knows that the SRS is a signal for requesting the TA command after receiving the SRS. Thereby the TA command is fed back after the second predetermined time, for example, the Y subframe.

Here, those skilled in the art can understand that the contents described above with respect to the hybrid DRX method according to the first and second embodiments of the present invention can also be equally applied to the hybrid DRX method according to the third embodiment of the present invention, I won't go into details here.

9 is a flow chart of a hybrid discontinuous reception method in accordance with a fourth embodiment of the present invention. As shown in FIG. 9, the hybrid DRX method 40 according to the fourth embodiment of the present invention is implemented by a base station, and includes: 401. Receiving a sounding reference signal SRS sent from the user equipment; 402, maintaining a second timing advance timer TAT of the user equipment, and determining, by referring to the second TAT, whether the SRS is the user equipment in the SRS transmitted at a third predetermined time before the second TAT expires; 403, in the case that it is determined that the SRS is an SRS sent by the user equipment at a third predetermined time before the second TAT expires, after receiving the SRS a fourth predetermined time after the SRS, the timing advance TA command is sent to the user equipment to cause the user terminal to maintain uplink synchronization; and 404, after receiving the fifth reservation after the user equipment successfully decodes the TA command After the TA command is sent from the user equipment, the second TAT is reset, wherein the second TAT time length of the base station side is less than the time length of the first TAT of the user equipment side. time.

Based on the above description of the hybrid DRX method according to the third embodiment of the present invention, here, the second TAT of the user equipment is also maintained on the base station side, so that when the user equipment transmits the SRS for a third predetermined time before the second TAT expires, the base station according to The second TAT of the maintained user equipment knows that the SRS is a signal for requesting a TA command, thereby transmitting a TA command to the user equipment to cause the user equipment to maintain uplink synchronization. In addition, since the user equipment resets the first TAT when the TA command is successfully decoded to complete the uplink synchronization, the base station also needs to update the second TAT of the maintained user equipment based on the reset of the first TAT on the user equipment side. Based on this, the user equipment sends a TA command response to the base station at the start time of the active time entering the TAU DRX period, i.e., after successfully decoding the TA command to complete the uplink synchronization and completing the uplink synchronization. Here, in the third embodiment of the present invention, it is assumed that the time for the user equipment to successfully decode the TA command to complete the uplink synchronization is negligible, so that the second TAT time length on the base station side is smaller than the first TAT time length on the user equipment side. The fifth scheduled time.

The contents described above with respect to the hybrid DRX method according to the third embodiment of the present invention can be equally applied to the hybrid DRX method according to the fourth embodiment of the present invention, and therefore will not be described again here.

Figure 10 is a flow chart of a hybrid discontinuous reception method in accordance with a fifth embodiment of the present invention. The hybrid DRX method 50 according to the fifth embodiment of the present invention is implemented by a base station, and includes: 501, receiving an arbitrary sounding reference signal SRS sent by a user equipment or an SRS having a specific identifier; 502, receiving any SRS sent by the user equipment or The timing advance TA command is transmitted for a fourth predetermined time after the SRS having the specific identity to assist the user equipment to maintain uplink synchronization.

As described in the hybrid DRX method according to the third embodiment of the present invention, when not maintained on the base station side When the TAT of the user equipment is used, the base station can set the base station at any time in order to ensure that the base station is aware of the signal used to request the TA command when receiving the signal such as the SRS for requesting the TA command. After receiving the SRS transmitted during the extended DRX cycle, feeding back the TA command after the fourth predetermined time, or setting the SRS transmitted by the UE for requesting the TA command between the extended DRX cycles is an SRS having a special identifier or a specific classification, such that After receiving such an SRS, the base station knows that the SRS is a signal for requesting a TA command, thereby feeding back the TA command after the second predetermined time.

Here, the content described with respect to the hybrid DRX method according to the third embodiment of the present invention can also be applied to the hybrid DRX method according to the fifth embodiment of the present invention, and therefore will not be described herein.

With the hybrid discontinuous reception method according to the embodiment of the present invention, the active time of the extended DRX cycle can be made to correspond to the periodic service characteristics of the user equipment, thereby maximally ensuring that the user equipment is in the DRX in the time when no service occurs. In the state, to achieve the effect of power saving. Moreover, by setting the user equipment to enter the TAU DRX period before the TAT timeout, thereby receiving the TA command from the base station during the active time of the TAU DRX period, the uplink synchronization of the user equipment can be maintained at all times.

Next, the base station and user equipment employing the hybrid DRX method as described above will be described. It will be understood by those skilled in the art that the content involved in the above-described hybrid DRX method according to the first to fifth embodiments of the present invention can be equally applied to the following descriptions of the base station and the user equipment, and therefore the duplicated content will be omitted here for convenience. .

11 is a schematic block diagram of a base station employing a hybrid DRX method in accordance with an embodiment of the present invention. As shown in FIG. 11, the base station 60 includes: an extended discontinuous reception DRX cycle mode configuration unit 601, which may be a processor, configured to configure an extended DRX cycle mode, wherein in the extended DRX cycle mode, configuration extension a DRX cycle, the extended DRX cycle includes a plurality of extended DRX periods, and each extended DRX period of the plurality of extended DRX periods is greater than or equal to a timing advance timer TAT of the user equipment; timing advance Updating the TAU DRX period mode configuration unit 602, which may be another processor, configured to configure a TAU DRX period mode, wherein, in the TAU DRX period mode, configuring a plurality of TAU DRX periods in the extended DRX period Configuring a first one of the plurality of TAU DRX periods with a first predetermined time less than the TAT at the beginning of the first DRX period of the plurality of extended DRX periods or after starting, and The time difference between any two adjacent TAU DRX periods in the plurality of TAU DRX periods is less than the TAT; the mode transmitting unit 603, and the extended DRX period module The configuration unit 601 is connected to the TAU DRX period mode configuration unit 602, and configured to send the extended DRX period mode and the TAU DRX period mode to the user equipment, and the mode sending unit 603 may be a port; the timing advance amount TA The command sending unit 604 may be another port, and is connected to the mode sending unit 603, and configured to send a TA command after receiving the sounding reference signal SRS sent by the user equipment for a second predetermined time.

Here, it will be understood by those skilled in the art that although not shown in the drawing, the extended DRX cycle mode configuration unit 601 can also be connected with the TAU DRX period mode configuration unit 602 to combine the extended DRX cycle and the TAU DRX period. The extended DRX cycle mode and the TAU DRX time zone mode are configured.

In the above base station, the TAU DRX period mode configuration unit 602 is further used in the

In the TAU DRX period mode, the configuration of the TAU DRX period in each extended DRX period is the same.

In the above base station, the TAU DRX period mode configuration unit 602 is further configured to configure the TAU DRX period in each of the extended DRX periods or in each of the extended DRX periods to be periodic.

In the above base station, the TAU DRX period mode configuration unit 602 is further configured to configure the TAU DRX period mode to include a start time of an activity time of each of the plurality of TAU DRX periods.

In the above base station, the TAU DRX period mode configuration unit 602 is further configured to configure the TAU DRX period mode to include a time when the user equipment corresponding to each of the plurality of TAU DRX periods transmits the SRS.

In the foregoing base station, the extended DRX periodic mode configuration unit 601 is further configured to configure the activity time of the DRX period of each extension not to include an inactivity timer.

12 is a schematic block diagram of a user equipment employing a hybrid DRX method in accordance with an embodiment of the present invention. As shown in FIG. 12, the user equipment 70 includes: a mode receiving unit 701, which may be a processor, configured to receive an extended discontinuous reception DRX cycle mode and a timing advance amount update TAU DRX period mode from a base station; an extended DRX cycle setting unit 702, connected to the mode receiving unit 701, configured to set an extended DRX cycle of the user equipment according to the extended DRX cycle mode, where the extended DRX cycle includes multiple extended DRX periods, the multiple extended Each extended DRX period in the DRX period is greater than or equal to the timing advance timer TAT of the user equipment, and the extended DRX cycle setting unit 702 may be another processor; TAU DRX period setting unit 703, may be implemented by a processor, and is connected to the mode receiving unit 701, configured to set, according to the TAU DRX period mode, a plurality of TAU DRX periods of the user equipment, where, in the extended DRX period, The first TAU DRX period of the plurality of TAU DRX periods is set at the beginning of the first DRX period in the extended DRX period or at a first predetermined time less than the TAT, and the plurality of TAUs The time difference between any two adjacent TAU DRX periods in the DRX period is smaller than the TAT; the transmitting unit 704 is connected to the extended DRX period setting unit 702 and the TAU DRX period setting unit 703, and may be a port for The TAU DRX period is set to transmit the sounding reference signal SRS; and the uplink synchronization unit 705 is connected to the transmitting unit 704 for waking up from the DRX state during each TAU DRX period, thereby receiving the timing advance TA command from the base station to Maintain uplink synchronization.

In the above user equipment, the TAU DRX period setting unit 703 is further configured to set the TAU DRX period in each extended DRX period to be the same based on the TAU DRX period mode.

In the above user equipment, the TAU DRX period setting unit 703 is further configured to set a TAU DRX period in each of the extended DRX periods or in each of the extended DRX periods based on the TAU DRX period mode. It is periodic.

In the above user equipment, the TAU DRX period mode may include a start time of an activity time of each of the plurality of TAU DRX periods. In this case, the transmitting unit 704 is further configured to transmit the SRS at a second predetermined time before the start time of the active time of each TAU DRX period.

In the above user equipment, the TAU DRX period mode may include a time when the user equipment corresponding to each of the plurality of TAU DRX periods transmits the SRS. In this case, the sending unit 704 is further configured to send the SRS at a time when the user equipment corresponding to each TAU DRX period transmits the SRS, and the uplink synchronization unit 705 is further used for the second predetermined time after the time when the SRS is sent. Wake up from the DRX state, thereby receiving a timing advance TA command from the base station to maintain uplink synchronization.

In the above user equipment, the extended DRX cycle setting unit 702 is further configured to set an inactivity timer in the active time of each extended DRX period in the extended DRX cycle.

13 is a schematic block diagram of another user equipment employing a hybrid DRX method in accordance with an embodiment of the present invention. As shown in FIG. 13, the user equipment 80 includes: an extended discontinuous reception DRX cycle setting unit 801, which may be a processor, which sets an extended DRX cycle, wherein the extended DRX The period includes a plurality of extended DRX periods, each of the plurality of DRX periods being greater than or equal to a timing advance timer TAT of the user equipment; the TAT maintenance unit 802, which may be another processor, and the extended DRX The period setting unit 801 is connected to maintain the first TAT of the user equipment to send the sounding reference signal SRS to the base station at a third predetermined time before the first TAT timeout; the uplink synchronization unit 803 may be a processor, and the TA The maintenance unit 802 is configured to enter a timing advance amount update TAU DRX period after a fourth predetermined time after transmitting the SRS to keep waking up from the DRX state during the active time of the TAU DRX period, thereby receiving the timing advance amount TA from the base station The command is used to maintain the uplink synchronization; the TAT reset unit 804 is connected to the uplink synchronization unit 803 for resetting the first TAT when the TA command is successfully decoded, or may be implemented by a processor.

In the above user equipment, the TAT reset unit 804 is further configured to transmit a TA command response to the base station for a fifth predetermined time after the start time of the active time of the TAU DRX period.

In the above user equipment, the sounding reference signal SRS may have a specific identifier to indicate that the base station transmits a TA command for a fourth predetermined time after receiving the SRS with the specific identifier.

In the above user equipment, the extended DRX cycle setting unit 801 is further configured to not include an inactivity timer in each D RX period of the extended D RX cycle.

Figure 14 is a schematic block diagram of another base station employing a hybrid DRX method in accordance with an embodiment of the present invention. As shown in FIG. 14, the base station 90 includes: a receiving unit 901, which may be a port for receiving a sounding reference signal SRS transmitted from a user equipment; a maintenance and determination unit 902, which may be a processor, and a receiving unit 901, configured to Maintaining a second timing advance timer TAT of the user equipment, and determining, by referring to the second TAT, whether the SRS is a sounding reference signal sent by the user equipment at a third predetermined time before the second TAT timeout An uplink synchronization unit 903, which may be another processor, is connected to the maintenance and determination unit 902, for detecting that the SRS is sent by the user equipment at a third predetermined time before the second TAT expires. In the case of the reference signal SRS, a timing advance TA command is transmitted to the user equipment for the user equipment to maintain uplink synchronization for a fourth predetermined time after receiving the SRS; and the TAT reset unit 904 may also be processed And connected to the uplink synchronization unit 903, configured to receive the fifth predetermined time after the user equipment successfully decodes the TA command After the user equipment transmits the TA command of response, resetting the second TAT maintained, wherein the second base station TAT duration time length of the first side of the device-side indoor TAT less than the fifth predetermined time.

15 is a schematic block diagram of still another base station employing a hybrid DRX method in accordance with an embodiment of the present invention. As shown in FIG. 15, the base station 100 includes: a receiving unit 1001, which may be a port, for receiving The sounding reference signal SRS sent by the user equipment; and the uplink synchronization unit 1002, which may be a processor, is connected to the receiving unit 1001, and is configured to send a timing after receiving any SRS sent by the user equipment or the SRS with the specific identifier. The TA command is advanced in advance to cause the user equipment to maintain uplink synchronization.

With the base station and the user equipment adopting the hybrid DRX method according to the embodiment of the present invention, the active time of the extended DRX cycle can be made to correspond to the periodic service characteristic of the user equipment, thereby maximizing the time when the user equipment does not have a service. Both are in the DRX state to achieve the effect of power saving. Moreover, by setting the user equipment to enter the TAU DRX period before the TAT timeout, thereby receiving the TA command from the base station during the active time of the TAU DRX period, the uplink synchronization of the user equipment can be maintained at all times.

Those of ordinary skill in the art will appreciate that the elements and algorithm steps of the various examples described in connection with the embodiments disclosed herein can be implemented in electronic hardware, computer software or a combination of both, in order to clearly illustrate hardware and software. Interchangeability, the composition and steps of the various examples have been generally described in terms of function in the above description. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the solution. A person skilled in the art can use different methods for implementing the described functions for each particular application, but such implementation should not be considered to be beyond the scope of the present invention.

It will be apparent to those skilled in the art that, for the convenience of the description and the cleaning process, the specific operation of the system, the device and the unit described above may be referred to the corresponding processes in the foregoing method embodiments, and details are not described herein again.

In the several embodiments provided herein, it should be understood that the disclosed systems, devices, and methods may be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the division of the unit is only a logical function division. In actual implementation, there may be another division manner, for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored, or not executed. In addition, the coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be electrical, mechanical or otherwise.

The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of the embodiment. In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above integrated unit can be implemented in the form of hardware or in the form of a software functional unit.

The integrated unit, if implemented in the form of a software functional unit and sold or used as a standalone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may contribute to the prior art or all or part of the technical solution may be embodied in the form of a software product stored in a storage medium. A number of instructions are included to cause a computer device (which may be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods described in various embodiments of the present invention. The foregoing storage medium includes: a U disk, a removable hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, and the like, which can store program codes. .

The above is only the specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of changes or substitutions within the technical scope of the present invention. It should be covered by the scope of the present invention. Therefore, the scope of the invention should be determined by the scope of the claims.

Claims

Rights request

A hybrid discontinuous reception method, comprising:

Configuring an extended discontinuous reception DRX cycle mode, wherein in the extended DRX cycle mode, configuring an extended DRX cycle, the extended DRX cycle includes a plurality of extended DRX periods, the plurality of extended DRX periods Each extended DRX period is greater than or equal to the timing advance timer TAT of the user equipment;

Configuring a timing advance amount to update a TAU DRX period mode, wherein, in the TAU DRX period mode, configuring a plurality of TAU DRX periods, in the extended DRX period, a first one of the plurality of extended DRX periods The first one of the plurality of TAU DRX periods is configured with a first TAU DRX of the plurality of TAU DRX periods at the beginning of the DRX period or after a start of the first predetermined time less than the TAT, and any two of the plurality of TAU DRX periods are adjacent The time difference between the TAU DRX periods is less than the TAT;

Transmitting the extended DRX cycle mode and the TAU DRX time period mode to the user equipment;

The timing advance TA command is transmitted at a second predetermined time after receiving the sounding reference signal SRS transmitted by the user equipment.

2. The method according to claim 1, wherein in the TAU DRX time period mode, configurations of TAU DRX periods in each extended DRX period are the same.

The method according to claim 1 or 2, wherein the TAU DRX period in each of the extended DRX periods or in each of the extended DRX periods is periodic.

The method according to any one of claims 1 to 3, wherein the TAU DRX period mode includes a start time of an activity time of each of the plurality of TAU DRX periods.

The method according to any one of claims 1 to 3, characterized in that the TAU

The DRX period mode includes a time at which the user equipment corresponding to each of the plurality of TAU DRX periods transmits the SRS.

The method according to any one of claims 1 to 5, characterized in that the inactivity timer is not included in the active time of each extended DRX period.

A hybrid discontinuous reception method, comprising:

Receive extended discontinuous reception DRX cycle mode and timing advance update TAU from base station DRX time period mode;

And setting an extended DRX period of the user equipment according to the extended DRX periodic mode, where the extended DRX period includes a plurality of extended DRX periods, and each extended DRX period of the plurality of extended DRX periods is greater than Or equal to the timing advance timer TAT of the user equipment; setting a plurality of TAU DRX periods of the user equipment according to the TAU DRX period mode, wherein in the extended DRX period, in the multiple extended DRX periods a first TAU DRX period of the plurality of TAU DRX periods, and any two of the plurality of TAU DRX periods, when the first DRX period begins or after a start is less than a first predetermined time of the TAT The time difference between adjacent TAU DRX periods is less than the TAT;

Transmitting the sounding reference signal SRS according to the setting of the plurality of TAU DRX periods; and waking up from the DRX state in each of the plurality of TAU DRX periods, and receiving the timing advance TA command from the base station to Maintain uplink synchronization.

8. The method of claim 7 wherein:

The start time of the activity time of each TAU DRX period is included in the TAU DRX period mode;

The transmitting the sounding reference signal SRS according to the setting of the plurality of TAU DRX periods includes: transmitting the SRS at a second predetermined time before a start time of the active time of each of the TAU DRX periods.

9. The method of claim 7 wherein:

The TAU DRX period mode includes a time when the user equipment corresponding to each TAU DRX period sends an SRS;

The transmitting the sounding reference signal SRS according to the setting of the multiple TAU DRX periods includes: transmitting the SRS at a time when the user equipment corresponding to each TAU DRX period sends an SRS;

The staying awake from the DRX state during each of the TAU DRX periods and receiving the timing advance TA command from the base station to maintain uplink synchronization includes:

A second predetermined time after the time at which the SRS is transmitted wakes up from the DRX state, and receives a timing advance TA command from the base station to maintain uplink synchronization.

The method according to any one of claims 7 to 9, wherein setting the extended DRX period of the user equipment according to the extended DRX cycle mode comprises:

The inactivity timer is not included in the activity time of setting each of the extended DRX periods.

11. A hybrid discontinuous reception method, comprising:

Setting an extended discontinuous reception DRX cycle, wherein the extended DRX cycle includes a plurality of extended DRX periods, and each extended DRX period of the plurality of extended DRX periods is greater than or equal to a timing advance of the user equipment Timer TAT;

Maintaining a first TAT of the user equipment, to send a sounding reference signal SRS to the base station at a third predetermined time before the first TAT timeout;

The fourth predetermined time after the transmission of the SRS enters the timing advance amount update TAU DRX period, stays awake from the DRX state during the active time of the TAU DRX period, and receives the timing advance TA command from the base station to maintain the uplink synchronization;

The first TAT is reset upon successful decoding of the TA command.

The method according to claim 11, further comprising:

The TA command response is transmitted to the base station at a fifth predetermined time after the start time of the active time entering the TAU DRX period.

13. The method of claim 11 or 12, wherein

The SRS has a specific identifier, and is used to indicate that the base station receives the specific identifier.

The TA command is sent for the fourth predetermined time after the SRS.

14. A hybrid discontinuous reception method, comprising:

Receiving a sounding reference signal SRS transmitted from the user equipment;

Maintaining a second timing advance timer TAT of the user equipment, and determining, by referring to the second TAT, whether the SRS is an SRS sent by the user equipment at a third predetermined time before the second TAT timeout;

In a case where it is determined that the SRS is an SRS transmitted by the user equipment at a third predetermined time before the second TAT timeout, a timing advance amount TA command is sent to the fourth predetermined time after receiving the SRS The user equipment is configured to maintain the uplink synchronization of the user terminal; and reset the maintenance after receiving a TA command response sent from the user equipment at a fifth predetermined time after the user equipment successfully decodes the TA command The second TAT, wherein the second TAT time length of the base station side is less than a time length of the first TAT of the user equipment side by a fifth predetermined time.

A hybrid discontinuous reception method, comprising:

Receiving any sounding reference signal SRS sent by the user equipment or an SRS having a specific identifier; The timing advance TA command is sent for a fourth predetermined time after receiving any SRS sent by the user equipment or the SRS with the specific identifier, to assist the user equipment to maintain uplink synchronization.

A base station, comprising:

An extended discontinuous reception DRX cycle mode configuration unit, configured to configure an extended DRX cycle mode, wherein in the extended DRX cycle mode, an extended DRX cycle is configured, where the extended DRX cycle includes multiple extended DRXs a period of time, the extended DRX period of the plurality of extended DRX periods is greater than or equal to a timing advance timer TAT of the user equipment; the timing advance quantity update TAU DRX period mode configuration unit, configured to configure the TAU DRX period mode, Wherein, in the TAU DRX period mode, a plurality of TAU DRX periods are configured, in the extended DRX period, when the first DRX period of the plurality of extended DRX periods starts or begins to be smaller than The first predetermined time of the TAT is configured with a first one of the plurality of TAU DRX periods, and a time difference between any two adjacent ones of the plurality of TAU DRX periods is less than the TAT;

a mode sending unit, connected to the extended DRX cycle mode configuration unit and the TAU DRX time period mode configuration unit, for transmitting the extended DRX cycle mode and the TAU DRX time slot mode to the user equipment;

The timing advance TA command transmitting unit is connected to the mode sending unit, and configured to send a TA command at a second predetermined time after receiving the sounding reference signal SRS sent by the user equipment.

17. A user equipment, comprising:

a mode receiving unit, configured to receive an extended discontinuous reception DRX cycle mode and a timing advance update TAU DRX time slot mode from the base station;

And an extended DRX cycle setting unit, configured to be connected to the mode receiving unit, configured to set an extended DRX cycle of the user equipment according to the extended DRX cycle mode, where the extended DRX cycle includes multiple extended DRX periods, Each extended DRX period of the plurality of extended DRX periods is greater than or equal to a timing advance timer TAT of the user equipment;

a TAU DRX period setting unit, configured to be connected to the mode receiving unit, configured to set a plurality of TAU DRX periods of the user equipment according to the TAU DRX period mode, wherein in the extended DRX period, in the multiple extensions The first TAU DRX period of the plurality of TAU DRX periods is set at the beginning of the first DRX period in the DRX period or at a first predetermined time less than the TAT, and the plurality of TAU DRX periods Any two adjacent TAUs in The time difference between the DRX periods is less than the TAT;

a transmitting unit, connected to the extended DRX cycle setting unit and the TAU DRX period setting unit, configured to send a sounding reference signal SRS according to a setting of a TAU DRX period; and an uplink synchronization unit, connected to the sending unit, for A wake up from the DRX state is maintained during each TAU DRX period, thereby receiving a timing advance TA command from the base station to maintain uplink synchronization.

18. A user equipment, comprising:

An extended discontinuous reception DRX cycle setting unit, where an extended DRX cycle is set, where the extended DRX cycle includes a plurality of extended DRX periods, and each of the multiple DRX periods is greater than or equal to a user equipment Timing advance timer TAT;

a TAT maintenance unit, connected to the extended DRX cycle setting unit, for maintaining a first TAT of the user equipment, to send a detection reference signal SRS to the base station at a third predetermined time before the first TAT timeout;

An uplink synchronization unit, connected to the TAT maintenance unit, for entering a timing advance amount update TAU DRX period after a fourth predetermined time after transmitting the SRS, to keep waking up from the DRX state during the active time of the TAU DRX period, thereby The base station receives the timing advance TA command to maintain uplink synchronization;

And a TAT reset unit, coupled to the uplink synchronization unit, for resetting the first TAT when the TA command is successfully decoded.

19. A base station, comprising:

a receiving unit, configured to receive a sounding reference signal SRS sent from the user equipment;

a maintenance and judgment unit, connected to the receiving unit, configured to maintain a second timing advance timer TAT of the user equipment, and determining, by referring to the second TAT, whether the SRS is the user equipment in the a sounding reference signal SRS sent by a third predetermined time before the TAT timeout; an uplink synchronization unit, connected to the maintenance and determination unit, for determining that the SRS is before the user equipment is timed out of the second TAT In the case of the sounding reference signal SRS transmitted by the third predetermined time, the timing advance amount TA is transmitted to the user equipment for the fourth predetermined time after receiving the SRS to cause the user terminal to maintain uplink synchronization;

a TAT reset unit, configured to be connected to the uplink synchronization unit, configured to reset the second maintained after receiving the TA command response sent from the user equipment after the user equipment successfully decodes the TA command for a fifth predetermined time TAT, wherein the second TAT time length of the base station side is greater than The time length of the first TAT on the user equipment side is less than the fifth predetermined time.

20. A base station, comprising:

Receiving unit, receiving a sounding reference signal SRS sent by the user equipment;

The uplink synchronization unit is connected to the receiving unit, and configured to send a timing advance TA command for a fourth predetermined time after receiving any SRS sent by the user equipment or the SRS with the specific identifier, so that the user equipment maintains uplink synchronization.