WO2012100731A1

WO2012100731A1 - Method and device for maintaining timer in carrier aggregation system

Info

Publication number: WO2012100731A1
Application number: PCT/CN2012/070663
Authority: WO
Inventors: 赵亚利
Original assignee: 大唐移动通信设备有限公司
Priority date: 2011-01-30
Filing date: 2012-01-20
Publication date: 2012-08-02
Also published as: CN102075993A; CN102075993B

Abstract

The present invention relates to the technical field of wireless communications. Disclosed are a method and a device for maintaining a timer in a carrier aggregation system. The invention solves the problem of how to maintain a discontinuous reception (DRX)-related timer that uses the number of sub-frames of a physical downlink control channel (PDCCH) as a duration statistic unit. In the present invention, a terminal selects a TDD uplink/downlink configuration; determines the timeout moment of the DRX-related timer according to the selected TDD uplink/downlink configuration, timer duration information of a DRX-related timer configured by a base station, and the start moment of the DRX-related timer, and maintains the DRX-related timer according to the timeout moment. The DRX-related timer is a DRX timer that uses the number of sub-frames of a PDCCH as a duration statistic unit. By use of the present invention, the DRX-related timer that uses the number of sub-frames of the PDCCH as a duration statistic unit can be maintained correctly.

Description

Timer maintenance method and device in carrier aggregation system This application claims to be submitted to the Chinese Patent Office on January 30, 2011, the application number is 201110033041.7, and the invention name is

The priority of the Chinese Patent Application, the entire disclosure of which is incorporated herein by reference. Technical field

The present invention relates to the field of wireless communications, and in particular, to a timer maintenance method and device in a carrier aggregation system.

Background technique

In a mobile communication system based on a shared channel, such as a Long Term Evolution (LTE) system, transmission of uplink and downlink data is controlled by a base station scheduler, and when the scheduler determines to schedule a terminal (UE), it will pass a physical layer control channel ( Physical control channel (PDCCH) A specific time-frequency resource that informs the terminal to receive or transmit data. The terminal monitors the PDCCH. When it detects that the PDCCH contains scheduling information for itself, it will complete transmission or reception of data according to the indication of the base station. In the active state, because the terminal is not sure when the base station will schedule it, a common mode of operation is that the terminal continuously monitors the PDCCH to determine whether it is scheduled. This mode of operation can achieve higher efficiency when the amount of data in the terminal is large and may be frequently scheduled. However, for some services, the data packet arrival time is irregular, and there may be no data arrival for a long time. In this case, if the terminal still continuously monitors the control channel, it will undoubtedly increase its power consumption. In order to solve the power consumption problem, the LTE system adopts the discontinuous reception (DRX) working mode. As shown in FIG. 1 , when the UE needs the control channel, the UE's RF channel will be opened and continuously monitor the control channel; When the time UE is in the Sleep state, its RF link will be turned off and the control channel will no longer be monitored to save power.

The DRX mechanism of LTE considers the arrival model of data services, that is, the arrival of data packets is bursty. It can be understood that once a data packet arrives, more packets will arrive in a shorter time. In order to adapt to this service arrival feature, the LTE DRX process uses a variety of timers and combines with the hybrid automatic repeat request (HARQ) process to achieve better power saving performance.

The DRX related timer includes a continuous listening timer (OnDurationTimer), a discontinuous reception short period timer (DrShShortCycleTimer), a discontinuous reception inactivity timer (Drx-InactivatityTimer), and a hybrid automatic repeat request (HQQ) round-trip time timer ( RTT Timer) and the discontinuous reception retransmission timer (Drx-RetransmissionTimer) are as follows:

OnDurationTimer: The UE periodically wakes up to monitor the timer of the control channel, as shown in Figure 1. The length of the timer is configured by radio resource control (RRC) signaling, and is in units of PDCCH subframes (psf). The minimum value is psfl, and the maximum value is ps£200. DrxShortCycleTimer: In order to better match the arrival of data services, the LTE system allows two DRX cycles to be configured: long cycle and short cycle. The two cycles of the onDurationTimer are the same, but the sleep time is different. In the short cycle, the sleep time is relatively shorter, and the UE can listen to the control channel again more quickly. The Long cycle must be configured and is the initial state of the DRX process; the short cycle is optional. DrxShortCycleTimer sets the duration of the short cycle. After the DrxShortCycleTimer times out, the UE will use the Long cycle. The DrxShortCycleTimer is configured by RRC signaling, and the length unit is the number of short cycles, ranging from 1 to 16.

Drx-InactivatityTimer: After the DRX is configured, the UE turns on the timer when the UE receives the control signaling of the initial transmission of the HARQ within the time allowed to listen to the control channel. Before the timer expires, the UE continuously monitors the control channel. . If the UE receives the scheduling signaling of the HARQ initial transmission before the Drx-InactivatityTimer times out, the Drx-InactivatityTimer will be restarted. The length of the timer is configured by RRC signaling, and is in units of PDCCH subframes (psf). The minimum value is psfl, and the maximum value is ps£2560.

HARQ RTT Timer: Applies only to the downlink (DL), which makes it possible for the UE to not monitor the control channel before the next retransmission, achieving better power saving. The UE will turn on this timer if it receives control signaling for HARQ transmission (initial transmission or retransmission). If the data in the corresponding HARQ process is unsuccessful after the previous HARQ transmission, the UE feeds back a negative acknowledgement (NACK). After the HARQ RTT Tnner times out, the UE starts Drx-RetransimssionTmie. If the data in the corresponding HARQ process is after the previous HARQ transmission. If the decoding succeeds, the UE feeds back a positive acknowledgement (ACK). After the HARQ RTT T mer timer expires, the UE does not start Drx-RetransimssionTnne. If only the HARQ RTT Timer is currently running, the UE does not listen to the control channel.

Drx-RetransmissionTimer: Applies only to DL. During the Drx-RetransmissionTimer, the UE listens for the null signaling and waits for the retransmission scheduling of the corresponding HARQ process. The length of the timer is configured by RRC signaling, in units of PDCCH subframes (psf). The minimum value is psfl and the maximum value is psfi3.

From the above description, the timing lengths of the onDurationTimer, drx-InactivityTimer, and drx-RetransmissionTimer in the DRX-related timer are counted based on the number of PDCCH subframes. For a time division duplex (TDD) system, a PDCCH subframe refers to a downlink subframe, including a downlink pilot time slot (DwPTS) in a special subframe. The method for calculating the timing length of the timer based on the number of PDCCH subframes is: first determining an uplink/downlink (UL/DL) configuration for the current cell, and then starting the subframe when the timer is started in the UL/DL configuration. Subframe, determining a termination subframe when the timer expires in the UL/DL configuration according to the number of PDCCH subframes, so that the time period from the start subframe to the termination subframe (including the start subframe and the termination subframe) The number of PDCCH subframes included is the number of PDCCH subframes; after the start subframe and the termination subframe are determined, the timer duration of the timer is also determined.

Figure 2 shows the working process and relationship of the above DRX related timers. At time t1 during the on duration, the eNB schedules the initial transmission for the process 1, so the UE opens the Drx-InactivatityTnner and the corresponding HARQ RTT Timerl. Since the initial transmission decoding of Process 1 is unsuccessful, after the HARQ RTT Timer expires, the UE opens the Drx-RetransmissionTimerl.

at time t2, the eNB scheduling the initial transmission for the Process 2, Drx-InactivatityTimer is restarted, while opening for HARQ RTT Timer2 Process 2 ₀

At time t3 before Drx-RetransimssionT merl times out, the UE receives a retransmission for Process 1, then terminates Drx-RetransmissionTimerl and opens HARQ RTT Timerl.

After the HARQ RTT Timer2 times out, since the initial transmission of Process 2 is not successfully decoded, the UE opens.

Drx-RetransmissionTimer2. At time t4 before the Drx-RetransmissionTimer2 timeout, the eNB scheduled the Process.

2 retransmission, then the UE terminates Drx-RetransimssionTnne and opens HARQ RTT Timer2.

At time t5 before the Drx-RetransimssionTnnerl timeout, the eNB continues to schedule the retransmission of Process 1, so

The Drx-RetransmissionTimerl is terminated and the HARQ RTT Timerl is started at the same time. Before the HARQ RTT Timer2 times out, the UE successfully decodes the data in Process 2, and then feeds back the ACK to the eNB. At the same time, after the HARQ RTT Timer2 times out, the Drx-RetransimssionTmie is no longer started. Similarly, before the HARQ RTT Timer 1 times out, the UE The data in Process 1 is successfully decoded, and then the ACK is fed back to the eNB. After the HARQ RTT Timer1 times out, the Drx-RetransmissionTimerl is no longer started.

Through the above process, you can see that in OnDurationTimer , Drx-RetransmissionTimer and

In the Drx-InactivatityTimer, any timer is running and the UE will listen to the control channel.

The time at which the UE listens to the control channel is also called Active Time. In the LTE system, the Active Time has other factors besides being affected by the DRX timer. In the LTE Release 8 (Rel-8), the Active Time of the UE includes the following times:

First, the OnDurationTimer or drx-Inactivity Timer or drx-RetransmissionTimer or the time when the media access empty resolution timer (mac-ContentionResolutionTnner) is running;

Second, the time that the UE waits for the base station to schedule after transmitting the uplink scheduling request (SR); third, the UE monitors the time for the uplink synchronization adaptive retransmission scheduling signaling;

Fourth, the time after the UE sends a random access preamble (preamble) and waits for a random access response.

The peak rate of the LTE Advanced (LTE-A) system is much higher than that of LTE, and it is required to achieve downlink lGbps and uplink 500 Mbps. At the same time, the LTE-A system requires good compatibility with the LTE system. The LTE-A system introduces carrier aggregation (CA) technology based on the need to increase peak rates, be compatible with LTE systems, and make full use of spectrum resources.

Carrier aggregation technology means that a terminal can aggregate multiple cells and work simultaneously on multiple cells. The cell aggregated by the terminal may be continuous or discontinuous in the frequency domain, and the bandwidth between the component carriers may be the same or different. To maintain compatibility with LTE systems, the maximum bandwidth limit per component carrier is 20 MHz. At present, it is generally believed that the number of cells that a terminal can aggregate is the largest. The number is five. In addition, LTE-A further classifies a cell that is aggregated by a carrier, and is divided into a primary cell (Pnmary cell, PCell) and a secondary cell (SCell), where: only one cell of the cell aggregated by the UE is defined as a PCell; The cells aggregated by the UE except PCell are called SCells.

The PCell is selected by the base station and configured to the terminal through RRC signaling, and the PCells of different terminals may be different. Regardless of PCell or SCell, each cell has an independent HARQ entity that maintains a series of independent processes.

LTE-A version 10 ( R10 ) uses the common ( common ) DRX mechanism, that is, the active time of all cells is the same, which is understood from the perspective of DRX-related timer maintenance:

The onDurationTimer and drx-InactivityTimer are based on UE maintenance, that is, there is initial transmission on any cell aggregated by the terminal, then the drx-InactivityTimer of the UE is started; the drx-RetransmissionTimer and the HARQ RTT Timer are based on process maintenance.

In R8/9/10, the physical layer standard defines the following seven UL/DL configurations for the TDD system, as shown in Table 1, where D stands for DL subframe, U stands for UL subframe, and S stands for special child of TDD system. frame.

UL/DL configuration definition table for TDD systems

In the R11 system, the CA terminal of the LTE-A can share or use adjacent frequency bands with other systems (such as the LTE system). For example, as shown in FIG. 3, the LTE-A terminal aggregates three cells: Celll, Cell2, and Cell3. Where Celll and Cell2 use the same band (Band) 1 and Cell3 uses Band2. In order to avoid uplink and downlink cross interference in the TDD system, Bandl should use TDD UL/DL configuration that can coexist with 3G/LTE TDD Band A. The so-called TDD configuration that can coexist is a configuration without UL/DL cross interference. For LTE systems, Refers to the same TDD UL/DL configuration. Band2 should use a TDD UL/DL configuration that can coexist with 3G/LTE TDD Band B. If Band A and Band B use different TDD UL/DL configurations, then the TDD UL/DL configurations used by Bandl and Band2 are different.

In the process of implementing the present invention, the inventors have found that the following technical problems exist in the prior art:

In R1, if the cell aggregated by the terminal supports different TDD UL/DL configurations, the DRX-related timers (including the onDurationTimer, which are counted in units of the length of the PDCCH subframes according to the UL/DL configuration of the different cells, are counted. The timing durations of drx-InactivityTnner and drx-RetransimssionTnner may be inconsistent in absolute time, and the timeouts of DRX-related timers are also different. For example, set the onDurationTnner length to psf4, the TDD UL/DL configuration on celll and cell2 is different, and use TDD UL/DL configuration 0 and configuration 1 respectively, then determine according to the UL/DL configuration on celll and cell2 respectively. The onDurationTnner timing duration is inconsistent in absolute time. The onDurationTnner timing is 8ms according to the UL/DL configuration statistics on cell 1, and the onDurationTnner timing is 6ms according to the UL/DL configuration statistics on cell2. 4 is shown.

It can be seen that, when the cell aggregated by the terminal supports different TDD UL/DL configurations, how to uniquely determine the timeout period of the DRX-related timer in which the number of PDCCH subframes is the length, and further maintain the DRX-related timer according to the timeout period. It is a problem that needs to be solved now.

Summary of the invention

The embodiment of the present invention provides a method and a device for maintaining a timer in a carrier aggregation system, which are used to solve the problem of how to maintain a DRX-related timer in which the number of PDCCH subframes is a statistical unit of length.

A timer maintenance method in a carrier aggregation system, the method comprising:

When the terminal aggregates or aggregates and activates the same time division duplex TDD uplink/downlink configuration, select a TDD uplink/downlink configuration.

Determining, by the terminal, a timeout time of the DRX-related timer according to the selected TDD uplink/downlink configuration, the timer length information of the discontinuous reception DRX-related timer configured by the base station, and the start time of the DRX-related timer, and Maintaining the DRX-related timer according to the timeout period; the DRX-related timer is a DRX timer whose physical downlink control channel PDCCH subframe number is a length statistical unit.

A timer maintenance device in a carrier aggregation system, the device includes:

The uplink/downlink configuration selection unit is configured to select a TDD uplink/downlink configuration when multiple cells in the terminal aggregation or aggregation and activation do not use the same time division duplex TDD uplink/downlink configuration;

a timeout time determining unit, configured to determine the DRX related timing according to the selected TDD uplink/downlink configuration, the timer length information of the discontinuous reception DRX related timer configured by the base station for the terminal, and the startup time of the DRX related timer Timeout of the device;

The timer maintenance unit is configured to maintain the DRX related timer according to the timeout period; the DRX related timer is a DRX timer whose physical downlink control channel PDCCH subframe number is a length statistical unit.

In this solution, when the terminal does not use the same TDD uplink/downlink configuration, the terminal selects a TDD uplink/downlink configuration according to the selected TDD uplink/downlink configuration and the base station is configured for the terminal. The timer length information of the DRX-related timer and the start time of the DRX-related timer determine a timeout time of the DRX-related timer, and maintain the DRX-related timer according to the timeout period. It can be seen that with this solution, the terminal can only use the data. The selected TDD uplink/downlink configuration determines the timeout time of the DRX-related timer on the terminal, and maintains the DRX-related timer according to the timeout period, and solves how the terminal side maintains the DRX with the PDCCH subframe number as the length statistical unit. The problem with the related timer.

When the base station aggregates or aggregates and activates multiple cells in the same time division duplex TDD uplink/downlink configuration, select a TDD uplink/downlink configuration.

Determining, by the base station, the timeout time of the DRX-related timer according to the selected TDD uplink/downlink configuration, the timer length information configured for the discontinuous reception DRX-related timer, and the start time of the DRX-related timer, and determining, according to the timeout The DRX-related timer is maintained at a time; the DRX-related timer is a DRX timer in which the number of physical downlink control channel PDCCH subframes is a statistical unit of length.

a timeout time determining unit, configured to determine a timeout of the DRX related timer according to the selected TDD uplink/downlink configuration, the timer length information configured for the discontinuous reception DRX related timer, and the start time of the DRX related timer Moment

In this solution, when a plurality of cells aggregated by the terminal do not use the same TDD uplink/downlink configuration, the base station selects a TDD uplink/downlink configuration, and configures a timer for the DRX-related timer according to the selected TDD uplink/downlink configuration. The length information and the start time of the DRX-related timer determine a timeout time of the DRX-related timer, and maintain the DRX-related timer according to the timeout period. It can be seen that, by using the solution, the base station can determine the timeout time of the DRX-related timer on the base station according to the selected TDD uplink/downlink configuration, and maintain the DRX-related timer according to the timeout period, thereby solving how the base station side maintains the PDCCH. The number of subframes is a problem of the DRX-related timer of the length statistical unit. DRAWINGS

1 is a schematic diagram of a DRX process in the prior art;

2 is a schematic diagram of a DRX operation process in the prior art;

3 is a schematic diagram of different UL/DL configurations of different bands used by LTE-A CA terminals in the prior art; FIG. 4 is a schematic diagram of DRX problems in different TDD configurations of a terminal aggregated carrier in the prior art; FIG. 5 is a schematic flowchart of a method according to an embodiment of the present disclosure;

FIG. 6 is a schematic flowchart of another method according to an embodiment of the present disclosure;

7A is a schematic diagram of execution timing according to Embodiment 1 of the present invention;

7B is a schematic diagram of execution timing of Embodiment 4 of the present invention;

7C is a schematic diagram of a MAC CE according to Embodiment 6 of the present invention;

7D is a schematic diagram of a MAC CE according to Embodiment 7 of the present invention;

7E is a schematic diagram of a MAC CE according to Embodiment 10 of the present invention;

7F is a schematic diagram of a MAC CE according to Embodiment 11 of the present invention;

FIG. 8 is a schematic structural diagram of a device according to an embodiment of the present invention. detailed description

In the embodiment of the present invention, the terminal selects a TDD uplink/downlink configuration in a certain manner, and then selects according to how to maintain the DRX-related timer in the carrier aggregation system. The TDD uplink/downlink configuration determines the timeout moment of the DRX related timer, and maintains the DRX related timer according to the determined timeout period.

Referring to FIG. 5, a method for maintaining a timer in a carrier aggregation system according to an embodiment of the present invention includes the following steps: Step 50: The terminal does not use the same time division duplex (TDD) in a plurality of cells that are aggregated or self-aggregated and activated. In the uplink/downlink configuration, select a TDD uplink/downlink configuration;

Step 51: The terminal determines a timeout time of the DRX-related timer according to the selected TDD uplink/downlink configuration, the timer length information of the DRX-related timer configured by the base station, and the start time of the DRX-related timer. The length of the timer is in units of the number of PDCCH subframes.

Step 52: The terminal maintains the DRX-related timer according to the determined timeout period. The DRX-related timer is a DRX timer in which the number of PDCCH subframes is a statistical unit of length.

The multiple cells that the terminal itself aggregates or self-aggregates and activates are the multiple cells that the base station configures for the terminal or the base station configures and activates.

In step 50, the terminal may select a TDD uplink/downlink configuration according to the TDD uplink/downlink configuration used by multiple cells and/or the configuration signaling of the base station.

In step 50, a TDD uplink/downlink configuration is selected, and the specific implementation can use the following four methods:

First, the terminal selects a TDD uplink/downlink configuration according to a TDD uplink/downlink configuration selection rule pre-agreed with the base station;

Second, the terminal selects a TDD uplink/downlink configuration by itself;

Third, the terminal selects a cell corresponding to the reference cell identifier according to the reference cell identifier configured by the base station explicit signaling. TDD uplink/downlink configuration; the signaling may be: Radio Resource Control (RRC) signaling or Medium Access Control (MAC) signaling.

Fourth, the terminal selects a reference TDD uplink/downlink configuration configured by the base station through explicit signaling. The signaling can be: RRC signaling or MAC signaling. The base station may send a reference TDD uplink/downlink configuration number, and the terminal determines the reference TDD uplink/downlink configuration according to the reference TDD uplink/downlink configuration number.

For the above terminal, the rules are selected according to the uplink/downlink configuration agreed in advance with the base station, and the examples are as follows:

Example 1: selecting a TDD uplink/downlink configuration used by a primary cell in the multiple cells;

Example 2: Select the TDD uplink/downlink configuration used by the cell corresponding to the cell number pre-agreed by the base station and the terminal; Example 3: Select the TDD uplink/downlink configuration used by the first cell in the multiple cells, where the first cell is a cell having the least or largest number of PDCCH subframes included in one of the plurality of cells;

Example 4: The TDD uplink/downlink configuration used by the second cell in the multiple cells is selected, and the second cell is determined according to the TDD uplink/downlink configuration used by each of the multiple cells. Determining an absolute running time of the DRX-related timer, and determining, as the second cell, a cell corresponding to the longest or shortest absolute running time;

Example 5: Selecting a TDD uplink/downlink configuration obtained by performing a union of PDCCH subframes in multiple cells and intersecting the remaining subframes; or

Example 6: Select the TDD uplink/downlink configuration agreed with the base station;

Example 7: Select the TDD uplink/downlink configuration used by the cell triggered by the trigger timer. This mode is applicable to DRX-related timers based on data transmission, such as InactivatityTimer and RetransimssionTnner. Here, for the InactivatityTimer, after receiving the initial transmission scheduling signaling sent by the base station for a certain cell, the terminal uses the cell as a cell triggered by the InactivatityTimer; for the RetransmissionTimer, the terminal is activated for a certain 'h zone. When the HARQ RTT Timer still fails to receive data correctly after timeout, the cell is used as the cell that triggers the RetransmissionTimer.

The other uplink/downlink configuration selection rules that the terminal does not pre-agreed with the base station may be a random selection rule, that is, the TDD uplink/downlink configuration is selected according to other uplink/downlink configuration selection rules: the terminal is from multiple cells. A TDD uplink/downlink configuration is randomly selected in the TDD uplink/downlink configuration or the TDD uplink/downlink configuration supported by the LTE system.

In the foregoing manners, the multiple cells may be multiple cells configured by the base station for the terminal, or multiple cells that are configured and activated by the base station.

Preferably, in order to maintain the consistency between the base station and the terminal, even if the base station and the terminal determine the timing of the same DRX-related timer according to the same TDD uplink/downlink configuration, after the terminal selects a TDD uplink/downlink configuration, the terminal may The selected TDD uplink/downlink configuration or its number information is sent to the base station, or if the terminal selects one of the TDD uplink/downlink configurations used by the multiple cells, the selected one may be used. The identification information of part or all of the cells in the TDD uplink/downlink configuration is sent to the base station, and the base station selects and determines the corresponding DRX correlation timing according to the received information. The TDD uplink/downlink configuration used when the device times out.

Specifically, the terminal may send the selected TDD uplink/downlink configuration to the base station through RRC signaling or MAC signaling, or select one of the TDD uplink/downlink configurations in the TDD uplink/downlink configuration used by the multiple terminals after the terminal selects multiple cells. The terminal sends the identification information of some or all of the cells in the selected TDD uplink/downlink configuration to the base station through RRC signaling or MAC signaling.

In the method, the DRX related timer includes: one or any combination of a continuous listening timer (OnDurationTimer), an inactivated timer (InactivatityTnner), and a retransmission timer (RetransimssionTnner). The TDD uplink/downlink configuration selected by the terminal for different DRX related timers may be the same or different.

In the step 51, the method for determining, by the terminal, the timeout time of the DRX-related timer may be: using the subframe in which the DRX-related timer is started in the selected TDD uplink/downlink configuration as the starting subframe, and configuring the terminal according to the base station. The timer length information of the DRX-related timer, in which the termination subframe when the DRX-related timer expires is determined in the TDD uplink/downlink configuration, so that the time period from the start subframe to the termination subframe (including the start subframe) And the number of PDCCH subframes included in the termination subframe is equal to the length of the timer; the moment when the termination subframe arrives is the timeout moment of the DRX-related timer. After the initial subframe and the termination subframe are determined, the absolute timing of the DRX-related timer is determined, that is, the absolute timing of the DRX-related timer = (terminating subframe number - starting subframe number) *lms.

In step 52, the terminal maintains the DRX-related timer according to the determined timeout period, which may be an event that triggers the DRX-related timer to restart or close after the DRX-related timer is started and before the timeout period expires. If it occurs, the DRX related timer is always maintained.

Referring to FIG. 6, the embodiment of the present invention further provides a timer maintenance method in a carrier aggregation system, which specifically includes the following steps:

Step 60: When a plurality of cells aggregated by the terminal do not use the same TDD uplink/downlink configuration, the base station selects a TDD uplink/downlink configuration.

Step 61: The base station determines, according to the selected TDD uplink/downlink configuration, the timer length information configured for the DRX-related timer, and the start time of the DRX-related timer, the timeout time of the DRX-related timer.

Step 62: The base station maintains the DRX-related timer according to the determined timeout period. The DRX-related timer is a DRX timer in which the number of PDCCH subframes is a statistical unit of length.

In step 60, the base station may select a TDD uplink/downlink configuration according to the TDD uplink/downlink configuration used by multiple cells and/or the signaling of the terminal.

In step 60, a TDD uplink/downlink configuration is selected from the TDD uplink/downlink configuration used by the multiple cells, and the specific implementation can be implemented in the following four manners:

First, the base station selects a TDD uplink/downlink configuration according to a TDD uplink/downlink configuration selection rule pre-agreed with the terminal; Second, the terminal selects a TDD uplink/downlink configuration by itself;

The third base station selects a TDD uplink/downlink configuration used by the cell corresponding to the reference cell identifier according to the reference cell identifier that is sent by the terminal in advance by using the signaling; the signaling may be: RRC signaling or MAC signaling;

Fourth, the base station selects a reference TDD uplink/downlink configuration that the terminal sends in advance through signaling. The signaling can be: RRC signaling or MAC signaling. The terminal may send a reference TDD uplink/downlink configuration number, and the base station determines the reference TDD uplink/downlink configuration according to the reference TDD uplink/downlink configuration number.

An example of the above-mentioned uplink/downlink configuration selection rules agreed with the terminal is as follows:

Example: 6: Select the TDD uplink/downlink configuration agreed with the terminal;

Example 7: Select the TDD uplink/downlink configuration used by the cell triggered by the trigger timer. This method is applicable to DRX-related timers based on data transmission, such as InactivatityTimer, RetransimssionTmier, and so on. Here, for the InactivatityTimer, after the base station sends the initial transmission scheduling signaling for a certain '■!, zone to the terminal, the cell is used as a cell triggered by the InactivatityTimer; for the RetransmissionTimer, the base station is for a certain 'h zone When the ACK response message sent by the terminal is still not received after the initiated HARQ RTT Timer expires, the cell is used as the cell triggered by the RetransmissionTimer.

The TDD uplink/downlink configuration selection rule that is not previously agreed with the terminal may be a random selection rule, that is, the base station selects a TDD uplink/downlink configuration, specifically: the TDD uplink/downlink configuration used by the base station from multiple cells. Or a TDD uplink/downlink configuration is randomly selected in the TDD uplink/downlink configuration supported by the LTE system.

Preferably, in order to maintain the consistency between the terminal and the base station, even if the terminal and the base station determine the timing duration of the same DRX-related timer according to the same TDD uplink/downlink configuration, after the base station selects a TDD uplink/downlink configuration, the base station may The selected TDD uplink/downlink configuration or the TDD uplink/downlink configuration number information is configured to the terminal, or if the base station selects one of the TDD uplink/downlink configurations used by the multiple cells, the selection will be selected. TDD up/down The identification information of some or all of the cells is configured for the terminal, and the terminal selects the TDD uplink/downlink configuration used when determining the timing duration of the corresponding DRX related timer according to the received information.

Specifically, the base station may configure the selected TDD uplink/downlink configuration or the TDD uplink/downlink configuration number information to the terminal through RRC signaling or MAC signaling, or if the base station selects multiple TDD uplink/downlinks used by the cell In a TDD uplink/downlink configuration in the configuration, the base station uses the RRC signaling or the MAC signaling to configure the identification information of some or all of the cells in the selected TDD uplink/downlink configuration to the terminal.

In the method, the DRX related timer includes one or any combination of: OnDurationTimer, InactivatityTimer, and RetransmissionTimer. The TDD up/down configuration selected by the base station for different DRX related timers may be the same or different.

In step 61, the method for determining, by the base station, the timing duration of the DRX related timer may be:

The subframe in which the timer is started in the downlink configuration is used as the starting subframe. According to the timer length information configured for the DRX-related timer, the termination subframe when the DRX-related timer expires is determined in the TDD uplink/downlink configuration. The number of PDCCH subframes included in the time period from the start subframe to the termination subframe (including the start subframe and the termination subframe) is equal to the timer length; the time when the termination subframe arrives is the DRX Timeout of the relevant timer. After the initial subframe and the termination subframe are determined, the absolute timing of the DRX-related timer is determined, that is, the absolute timing of the DRX-related timer = (terminating subframe number - starting subframe number) *lms.

In step 62, the base station maintains the DRX-related timer according to the determined timeout period, which may be an event that triggers the DRX-related timer to restart or close after the DRX-related timer is started and before the timeout period expires. If it occurs, the DRX related timer is always maintained.

The invention will now be described by way of specific embodiments:

The present invention provides a DRX-related timer for determining the number of PDCCH subframes (including the DwPTS of a special subframe) as a length statistical unit in a case where all or a part of the cells of the terminal aggregation use different TDD UL/DL configurations. The method of timeout.

The core idea of the method is that the timeout time of a DRX-related timer in which the number of PDCCH subframes (including the DwPTS of the special subframe) is a statistical unit of length can be counted according to only one TDD UL/DL configuration. Each DRX-related timer can refer to a different TDD UL/DL configuration, respectively.

The DRX timer includes an OnDurationTimer, a drx-Inactivatity Timer, and a drx-RetransmissionTimer. The principles for determining the TDD UL/DL configuration referenced by the timeout of each DRX-related timer are as follows: First, the base station and the terminal use the default TDD UL/DL reference configuration.

This principle requires the base station and the terminal to pre-agreed to determine the default TDD UL/DL reference configuration using the same method. Specifically, the default TDD UL/DL configuration can be determined as follows:

Refer to the TDD UL/DL configuration on the primary cell (PCell). Refer to the TDD uplink/downlink configuration used by the cell corresponding to the cell number pre-agreed by the base station and the terminal. The TDD UL/DL configuration on the cell with the least number of radio frame PDCCH subframes in all cells configured or configured and activated by the base station.

The TDD UL/DL configuration on the cell with the largest number of DCCCH subframes in one radio frame in all cells configured or configured and activated by the base station.

The TDD UL/DL configuration on the cell with the longest absolute running time of the timer obtained by the base station for the terminal configuration or configured and activated according to the number of PDCCH subframes.

The TDD UL/DL configuration on the cell with the shortest absolute running time of the timer, which is calculated according to the number of PDCCH subframes, is calculated by the base station for the terminal.

Base stations and terminals use some TDD UL/DL configuration by default (no cell involved).

For DRX timers based on data transmission start, for example, drx-InactivityT mer drx-RetransmissionTimer can refer to the TDD uplink/downlink configuration used by the cell triggered by the trigger timer.

The TDD uplink/downlink configuration obtained by the base station for the terminal configuration or configuration and activation of all the cells in the PDCCH subframes and the remaining subframes.

Second, the terminal selects a reference cell for the timer or refers to a TDD UL/DL configuration number, such as a random selection, and then notifies the base station by using RRC signaling or MAC CE.

It should be noted that if the terminal always selects the same cell or the same TDD UL/DL configuration for each DRX-related timer, there is no need to distinguish the timer when configuring the reference cell in the signaling.

Third, the base station configures a timer length reference cell for the terminal through the RRC signaling or the MAC CE or directly configures the TDD UL/DL configuration number.

Note that if the base station always configures the same timer length reference cell or TDD UL/DL configuration number for all timers, there is no need to distinguish between timers when configuring the reference cell.

In addition, the above only lists the most typical determination method for determining the DRX timer length statistics by using the number of PDCCH subframes as the length statistical unit. The TDD UL/DL configuration is not excluded, and is not enumerated here.

The base station is configured with three cells, which are called SCelll, SCell2, and PCell, and all three cells are in an active state. The TDD UL/DL configuration corresponding to each cell is TDD UL/DL configuration 0, TDD UL/DL configuration 1 and TDD UL/DL 酉 2 respectively. The OnDurationTimer, drx-Inactivatity Timer, and drx-RetransmissionTimer lengths 3⁄43 take 5 PDCCH subframes, and the HARQ RTT timer takes 10ms. Based on the above assumptions, the implementation of the present invention is as follows: Embodiment 1: The DRX-related timer length determination in which the number of PDCCH subframes is a length statistical unit refers to PCelL. As shown in FIG. 7A, when t0 is set, the terminal starts onDurationTimer, onDurationTimer length. For 5 PDCCH subframes, onDurationTimer will time out after t0+5ms according to the PDCCH subframe statistics on the PCell. In the subframe where the onDurationTimer is about to time out, the terminal receives the scheduling signaling for the initial transmission of the process S11 on the Selll, and then the terminal The terminal starts drx-InactivityTimer and the HARQ RTT Timer for process S11. The length of the Drx-InactivityTimer is 5 PDCCH subframes. According to the PDCCH subframe statistics on the PCell, the drx-InactivityTimer will time out after t0+10ms, but at t0+9ms, the terminal receives the scheduling for the initial transmission of the process S21 on SCell2. Common DRX, you need to restart the drx-InactivityTimer and start the HARQ RTT Tmier for process S21. During the operation of the HARQ RTT Timer of the process S11, the terminal does not successfully receive the data packet of the process S11 on the SCelll, the terminal needs to start the drx-RetransimssionTmier for the process, according to the PDCCH subframe statistics on the PCell, the drx-RetransmissionTimer of the process S11 The timeout will be after t0+21ms. Before the drx-RetransmissionTimer of S11 has not timed out (t0+20ms), the terminal receives the retransmission scheduling signaling for S11. At this time, the drx-RetransmissionTimer of the process S11 is stopped and the process for the process S11 is started. HARQ RTT timer.

The above description is described by taking the process S11 on SCelll as an example, and the process of S21 is similar.

Embodiment 2: The DRX timer length determination in which the number of PDCCH subframes is a length statistical unit refers to a cell in which the number of PDCCH subframes in a radio frame is the smallest among all cells in which the terminal is configured or configured and activated.

Compared with the first embodiment, this embodiment needs to add one step, that is, it is necessary to first determine which of all cells in the cell configured or configured and activated by the base station is the least number of PDCCH subframes in one radio frame, and then onDurationTimer, Drx- in the DRX process. The InactivityTimer and the drx-RetransmissionTimer need to count the timer length in the PDCCH subframe in the cell.

According to the premise of all the embodiments of the present invention, after determining that the PDCCH subframe of the SCelll is the least, in the i" column, the onDurationTimer, the Drx-InactivityTimer, and the drx-RetransmissionTimer in the DRX process need to use the PDCCH subframes in the SCelll. The number of timers is counted instead of the number of PDCCH subframes on the PCell, which is the only difference from Embodiment 1.

Embodiment 3: The DRX timer length determination in which the number of PDCCH subframes is a length statistical unit refers to a cell with the largest number of PDCCH subframes in one radio frame for all cells configured or configured and activated.

Similar to the embodiment 2, compared with the embodiment 1, the embodiment needs to add one step, that is, it is necessary to first determine which cell in the cell is configured or configured and activated, and which cell has the largest number of PDCCH subframes in one radio frame, and then DRX In the process of onDurationTimer, Drx-InactivityTimer, and drx-RetransmissionTimer, it is necessary to count the timer length by the PDCCH subframe in the cell.

According to the premise assumptions of all embodiments of the patent, it is determined that the PDCCH subframe of the PCell is the most. Therefore, in the present embodiment, the onDurationTimer, the Drx-InactivityTimer, and the drx-RetransmissionTimer in the DRX process need to count the timer length in the number of PDCCH subframes in the PCell. Therefore, the specific DRX process in this embodiment is exactly the same as that in Embodiment 1. It is not repeated here.

Embodiment 4: The DRX timer length determination in which the number of PDCCH subframes is a length statistical unit is the longest absolute running time of the timer according to the number of PDCCH subframes in all cells configured or configured and activated by the base station. Community.

As shown in FIG. 7B, at time t0, the terminal starts onDurationTimer, and the length of the onDurationTimer is 5 PDCCH subframes. According to the statistics of 5 PDCCH subframes, the onDurationTimer on SCelll runs the longest time, so The onDurationTimer is logged according to the PDCCH subframe on SCelll, and the onDurationTimer will time out after tO+1 lms. In the subframe where the onDurationTimer is about to time out, the terminal receives the scheduling signaling for the initial transmission of the process S11 on the Selll, and the terminal starts the drx-InactivityTimer and the HARQ RTT Timer for the process S11. The length of Drx-InactivityTimer is 5 PDCCH subframes. According to the statistics of 5 PDCCH subframes, the absolute time of drx-InactivityTimer running on SCelll is the longest, so the length of drx-InactivityTimer is on SCelll. PDCCH subframe statistics, drx-InactivityTimer will time out after t0+16ms, but at t0+9ms, the terminal receives the scheduling for the initial transmission of process S21 on SCell2. According to common DRX, you need to restart the drx-InactivityTimer and start against The HARQ RTT Timer of the process S21 „ During the HARQ RTT Timer operation of the process S11, the terminal does not successfully receive the data packet of the process S11 on the SCelll, the terminal needs to start the drx-RetransmissionTimer for the process, starting from the start time of the drx-RetransmissionTimer According to the statistics of 5 PDCCH subframes, the absolute time of the drx-RetransmissionTimer running on SCelll is the longest. Therefore, according to the PDCCH subframe statistics on SCelll, the drx-RetransimssionTnner of process S11 will time out after t0+21ms, at S11. drx-RetransimssionTnner did not time out before (t0+20 Ms), the terminal receives the retransmission scheduling signaling for S11, and at this time, the drx-RetransimssionTnner of the process S11 is stopped and the HARQ RTT timer for the process S11 is simultaneously started.

Embodiment 5: The DRX timer length determination in which the number of PDCCH subframes is a length statistical unit refers to the cell with the shortest absolute running time of the timer obtained by counting the number of PDCCH subframes in all cells configured or configured and activated by the base station. .

Similar to the fourth embodiment, the only difference here is that the length statistics reference cell of each DRX timer is counted from the start time of the timer, according to the statistics of the four PDCCH subframes, and which of the SCell timers runs the longest absolute time. , which cell to choose as a reference. According to the premise assumptions of all embodiments of the present patent, in accordance with the above-mentioned reference cell selection principle, in the i" column, the onDurationTimer, the Drx-InactivityTimer, and the drx-RetransmissionTimer in the DRX process select PCell as a reference.

Embodiment 6: The terminal selects a cell for each timer, and the reference cells of each timer are respectively selected. For example, the terminal may select onDurationTimer reference PCell, Drx-InactivityTimer reference SCelll, drx-RetransmissionTimer reference SCell2.

In this case, the terminal needs to inform the base station which cell is selected by each timer as the timer length statistics reference, so as to ensure the consistency between the base station and the terminal for understanding the absolute length of the timer. If RRC signaling is used, the format can be as follows:

If the MAC CE mode is used, the format can be as shown in Figure 7C. Note that a new LCID needs to be introduced to identify the MAC CE. among them:

Timer Index: expressed in 2bit, which is the number of ^1" onDurationTimer, Drx-Inactivity Timer, and drx-RetransmissionTimer, t匕^ port onDurationTimer is represented by 00, Drx-InactivityTime is represented by 01, and drx-RetransmissionTimer is represented by 10.

Reference cell bitmap or index: There are two ways to use it:

Mode 1: It is represented by a bitmap, which occupies 5 bits, and each bit corresponds to a cell. If the Timer refers to the cell, then the corresponding cell is set to 1, otherwise it is set to 0;

Mode 2: It is represented by the cell number, occupying the lowest bit of the byte by 3 bits, and the rest is set to the reserved bit, that is, Rbit;

Embodiment 7: The terminal selects a reference cell for the DRX timer, but restricts all timers from referring to the same cell.

And implementation i" column 6 ό々 main area another ¹ J, in onDurationTimer / drx-InactivityTimer / drx-RetransmissionTimer must choose the same reference cell, the main advantage is to reduce signaling overhead.

If RRC signaling is used, the format can be as follows:

DRX timer reference cell Reference cell number If the MAC CE mode is used, the format can be as shown in Figure 7D. Note that you need to introduce a new LCID to identify the MAC CE.

The Reference cell bitmap or index is used in the same manner as in Embodiment 7.

Embodiment 8: The base station configures a reference cell corresponding to each timer for the terminal, and the reference cells of each timer are allowed to be different. For example, the base station can select the reference cell as PCell for the onDurationTimer, and the Drx-InactivityTimer reference cell is

SCelll, drx-RetransmissionTimer refers to cell SCell2.

In this case, the base station needs to notify the terminal which cell is selected by each timer as the timer length statistics reference, so as to ensure the consistency between the base station and the terminal for understanding the absolute length of the timer.

The notification may use RRC signaling or MAC CE, and the format is the same as that of Embodiment 6, except that the signaling transmission direction is different. Embodiment 9: The base station configures a reference cell corresponding to each timer for the terminal, and limits each timer to refer to the same cell.

TDD UL/DL configuration. Compared with the eighth embodiment, the signaling overhead can be reduced, which is simple.

In order to maintain the consistency between the base station and the terminal, the base station needs to notify the terminal which length of the DRX timer length statistics to refer to, and the notification can use RRC signaling or MAC CE, and the format is the same as that in the seventh embodiment.

Embodiment 10: The terminal selects a TDD UL/DL configuration for each timer length statistics, and the reference TDD UL/DL configuration of each timer is different.

Similar to Embodiment 6, the difference is that this is a direct selection of the reference TDD UL/DL configuration, rather than referring to the TDD UL/DL configuration on which cell.

If RRC signaling is used, the format can be as follows:

If the MAC CE mode is used, the format can be as shown in Figure 7E. Note that you need to introduce a new LCID to identify the

MAC CE.

among them:

The meaning of Timer Index is the same as in Example 6.

Since there are only seven types of TDD UL/DL configuration, it can be represented by the 3bit from the right to the left, and the remaining 2 bits are used as the reserved field, that is, Rbit.

Embodiment 11: The terminal selects a TDD UL/DL configuration for the length statistics of each timer, and the reference TDD UL/DL configuration of each timer must be the same.

Compared with Embodiment 10, the difference is that the RRC or MAC CE format can be simplified without distinguishing between timers.

t匕3⁄4口" ⁵ Γ to 3⁄4 口Ί^ :

DRX timer reference cell reference TDD UL/DL configuration number If the MAC CE mode is used, the format can be as shown in Figure 7F. Note that you need to introduce a new LCID to identify the MAC CE.

Embodiment 12: The base station configures a reference TDD UL/DL configuration corresponding to each timer for the terminal, and the reference TDDUL/DL configuration of each timer allows different

For example, the base station may select, for the onDurationTimer, a reference cell as a PCell, a Drx-InactivityTimer reference cell as a SCelll, and a drx-RetransmissionTimer as a reference cell SCell2.

In this case, the base station needs to inform the terminal which cell is selected by each timer as the timer length statistics reference, so as to ensure the consistency between the base station and the terminal for understanding the absolute length of the timer. The notification may use RRC signaling or MAC CE, and the format is the same as that in Embodiment 10 except that the signaling transmission direction is different. Embodiment 13: The base station configures a reference TDD UL/DL configuration corresponding to each timer for the terminal, and limits each timer reference TDD UL/DL configuration to be the same

Relatively to the embodiment 12, the signaling overhead can be reduced, which is relatively simple.

In order to maintain the consistency of the understanding between the base station and the terminal, the base station needs to notify the terminal which length of the DRX timer length statistics to refer to, and the notification can use RRC signaling or MAC CE, and the format is the same as that of the embodiment 11.

Embodiment 14: Select a TDD uplink/downlink configuration obtained by performing a union of PDCCH subframes in the multiple cells and intersecting the remaining subframes.

Compared with the embodiment 1, the embodiment needs to add one step, that is, the TDD uplink/downlink configuration obtained by performing the union of the PDCCH subframes in the multiple cells and the intersection of the remaining subframes, and then onDurationTnner, Drx in the DRX process. -InactivityTimer and drx-RetransmissionTimer need to count the timer length by taking the PDCCH subframe after the union.

In this embodiment, the onDurationTimer, the Drx-InactivityTimer, and the drx-RetransmissionTimer in the DRX process need to count the timer length by the number of PDCCH subframes after the union, instead of the number of PDCCH subframes on the PCell, which is the embodiment. The only difference between 1.

Referring to FIG. 8, the embodiment of the present invention further provides a timer maintenance device in a carrier aggregation system, where the device includes: an uplink/downlink configuration selection unit 80, configured to aggregate or self-aggregate and activate multiple cells in the terminal itself. When using the same time division duplex TDD uplink/downlink configuration, select a TDD uplink/downlink configuration;

The timeout time determining unit 81 is configured to determine the DRX correlation according to the selected TDD uplink/downlink configuration, the timer length information of the discontinuous reception DRX related timer configured by the base station for the terminal, and the startup time of the DRX related timer. Timeout of the timer;

The timer maintenance unit 82 is configured to maintain the DRX related timer according to the timeout period. The DRX related timer is a DRX timer whose physical downlink control channel PDCCH subframe number is a length statistical unit.

The up/down configuration selection unit 80 is configured to:

According to the TDD uplink/downlink configuration selection rule pre-agreed with the base station, select a TDD uplink/downlink configuration; or, select a TDD uplink/downlink configuration by itself; or

Determining the TDD uplink/downlink configuration used by the cell corresponding to the reference cell identifier according to the reference cell identifier configured by the base station explicit signaling; or

Select the reference TDD uplink/downlink configuration configured by the base station through explicit signaling.

The signaling is: RRC signaling or MAC signaling.

The device also includes:

The selection information sending unit 83 is configured to select the selected TDD on the TDD/downlink configuration after the self/selection The downlink configuration is sent to the base station, or when the terminal selects one of the TDD uplink/downlink configurations in the TDD uplink/downlink configuration used by the multiple cells, the identifier information of some or all of the selected TDD uplink/downlink configurations is used. Send to the base station.

The selection information transmitting unit 83 is configured to:

The RRC signaling or signaling is used to send the selected TDD uplink/downlink configuration to the base station, or when the terminal selects one of the TDD uplink/downlink configurations used by the multiple cells, the terminal passes the RRC letter. The command or MAC signaling will be sent to the base station using the identification information of some or all of the cells of the selected TDD uplink/downlink configuration.

The uplink/downlink configuration selection unit 80 selects a TDD uplink/downlink configuration according to an uplink/downlink configuration selection rule that is pre-agreed with the base station, specifically:

Selecting a TDD uplink/downlink configuration used by the primary cell in the multiple cells; or

Selecting a TDD uplink/downlink configuration used by the cell corresponding to the cell number pre-agreed by the terminal; or selecting a TDD uplink/downlink configuration used by the first cell of the multiple cells, where the first cell is the multiple cells a cell in which the number of PDCCH subframes included in one radio frame is the smallest or largest; or

Determining the TDD uplink/downlink configuration used by the second cell in the multiple cells, where the determining method of the second cell is: determining, according to the TDD uplink/downlink configuration used by each of the multiple cells The absolute running time of the DRX-related timer, and the cell corresponding to the longest or shortest absolute running time is determined as the second cell;

Selecting a TDD uplink/downlink configuration obtained by performing a union of the PDCCH subframes in the multiple cells and intersecting the remaining subframes; or

Select the TDD uplink/downlink configuration agreed with the base station; or

Select the TDD uplink/downlink configuration used by the cell triggered by the trigger timer;

The plurality of cells are a plurality of cells in which the base station is configured for the terminal or the base station is configured and activated by the terminal.

The uplink/downlink configuration selection unit selects a TDD uplink/downlink configuration by itself: the terminal randomly selects a TDD from the TDD uplink/downlink configuration used by multiple cells or the TDD uplink/downlink configuration supported by the LTE system. / Downstream configuration.

The DRX related timer includes:

One or any combination of the continuous listening timer OnDurationTimer, inactive timer InactivatityTimer, retransmission timer RetransmissionTimer.

The uplink/downlink configuration selected by the uplink/downlink configuration selection unit 80 for different DRX related timers is the same or different.

The timer maintenance device provided by the foregoing embodiment may be specifically a device such as a terminal.

Still referring to FIG. 8, the embodiment of the present invention further provides a timer maintenance device in a carrier aggregation system, where the device includes: an uplink/downlink configuration selection unit 80, where multiple cells aggregated in the terminal do not use the same time-division double When configuring TDD uplink/downlink configuration, select a TDD uplink/downlink configuration;

The timeout period determining unit 81 is configured to perform discontinuous reception DRX related timing according to the selected TDD uplink/downlink configuration. Determining a timeout period of the DRX-related timer, and determining a timeout period of the DRX-related timer;

The up/down configuration selection unit 80 is configured to:

According to the TDD uplink/downlink configuration selection rule pre-agreed with the terminal, select a TDD uplink/downlink configuration; or, select a TDD uplink/downlink configuration by itself; or

Selecting a TDD uplink/downlink configuration used by the cell corresponding to the reference cell identifier according to the reference cell identifier that is sent by the terminal in advance by signaling; or

Select the reference TDD uplink/downlink configuration that the terminal sends in advance through signaling.

The signaling is: RRC signaling or MAC signaling.

The device also includes:

The information sending unit 83 is configured to: after selecting a TDD uplink/downlink configuration, configure the selected TDD uplink/downlink configuration to the terminal or select one of the TDD uplink/downlink configurations used by the base station to select multiple cells. After the TDD uplink/downlink configuration, the identification information of some or all of the cells in the selected TDD uplink/downlink configuration is used and configured for the terminal.

The selection information transmitting unit 83 is configured to:

The RRC signaling or the MAC signaling is used to configure the selected TDD uplink/downlink configuration to the terminal; or when the base station selects one of the TDD uplink/downlink configurations used by the multiple cells, the RRC passes the RRC. The signaling or MAC signaling will be configured to the terminal using the identification information of some or all of the cells in the selected TDD uplink/downlink configuration.

The uplink/downlink configuration selection unit 80 selects a TDD uplink/downlink configuration according to a TDD uplink/downlink configuration selection rule that is pre-agreed with the terminal, specifically:

Determining the TDD uplink/downlink configuration used by the second cell in the multiple cells, where the determining method of the second cell is: determining, according to the TDD uplink/downlink configuration used by each of the multiple cells The absolute running time of the DRX-related timer, determining the cell corresponding to the longest or shortest absolute running time as the second cell; or

Select the TDD uplink/downlink configuration agreed with the terminal; or,

Select the TDD uplink/downlink configuration used by the cell triggered by the trigger timer. The self-selection of a TDD uplink/downlink configuration is specifically: the base station randomly selects a TDD uplink/downlink configuration from a TDD uplink/downlink configuration used by multiple cells or a TDD uplink/downlink configuration supported by the LTE system.

The DRX related timer includes:

The timer maintenance device provided by the foregoing embodiment may be specifically a device such as a base station.

In summary, the beneficial effects of the present invention include:

In the solution provided by the embodiment of the present invention, when the terminal does not use the same TDD uplink/downlink configuration, the terminal selects a TDD uplink/downlink configuration from the TDD uplink/downlink configuration used by the multiple cells. Determining the timeout time of the DRX-related timer according to the selected TDD uplink/downlink configuration, the timer length information configured by the base station for the DRX-related timer, and the start time of the DRX-related timer, and maintaining according to the timeout period The DRX related timer. It can be seen that, by using the solution, the terminal can determine the timeout time of the DRX-related timer on the terminal according to the selected TDD uplink/downlink configuration, and solve the problem of how the terminal side determines the DRX with the PDCCH subframe number as the length statistical unit. The problem of the timeout of the related timer, so that the terminal side can correctly maintain the DRX related timer.

In the solution provided by the embodiment of the present invention, when a plurality of cells aggregated by the terminal do not use the same TDD uplink/downlink configuration, the base station selects a TDD uplink/downlink configuration, and selects a TDD uplink/downlink configuration according to the selected TDD uplink/downlink configuration. The timer length information configured by the device and the start time of the DRX-related timer determine a timeout time of the DRX-related timer, and maintain the DRX-related timer according to the timeout period. It can be seen that, by using the solution, the base station can determine the timeout time of the DRX-related timer on the base station according to the selected TDD uplink/downlink configuration, and solve the problem of how the base station side determines the DRX with the PDCCH subframe number as the length statistical unit. The problem of the timeout of the related timer, so that the base station side can correctly maintain the DRX related timer.

The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (system), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flowchart illustrations and/or FIG. These computer program instructions can be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing device to produce a machine for the execution of instructions for execution by a processor of a computer or other programmable data processing device. Means for implementing the functions specified in one or more of the flow or in a block or blocks of the flow chart.

The computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device. The device is implemented in a block or blocks of a flow or a flow and/or a block diagram of the flowchart Features.

These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device. The instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.

Although the preferred embodiment of the invention has been described, it will be apparent to those skilled in the art that, Therefore, it is intended that the appended claims be interpreted as including

It is apparent that those skilled in the art can make various modifications and variations to the embodiments of the present invention without departing from the spirit and scope of the embodiments of the present invention. Thus, it is intended that the present invention cover the modifications and modifications of the embodiments of the invention.

Claims

Rights request

When a terminal aggregates itself or autonomously aggregates and activates multiple cells without using the same time division duplex TDD uplink/downlink configuration, select a TDD uplink/downlink configuration;

The method of claim 1, wherein the selecting a TDD uplink/downlink configuration comprises: the terminal selecting a TDD uplink/downlink configuration according to a TDD uplink/downlink configuration selection rule pre-agreed with the base station; Or, the terminal selects a TDD uplink/downlink configuration by itself; or

The terminal selects a TDD uplink/downlink configuration used by the cell corresponding to the reference cell identifier according to the reference cell identifier configured by the base station explicit signaling; or

The terminal selects the reference TDD uplink/downlink configuration configured by the base station through explicit signaling.

The method according to claim 2, wherein the signaling is: radio resource control RRC signaling or media access control MAC signaling.

The method of claim 2, wherein after the terminal selects a TDD uplink/downlink configuration, the method further includes:

The terminal sends the selected TDD uplink/downlink configuration to the base station; or

After the terminal selects one TDD uplink/downlink configuration in the TDD uplink/downlink configuration used by the multiple cells, the identifier information of some or all of the cells in the selected TDD uplink/downlink configuration is used and sent to the base station.

The method according to claim 4, wherein the terminal sends the selected TDD uplink/downlink configuration or the TDD uplink/downlink configuration number to the base station by using RRC signaling or MAC signaling; or

After the terminal selects one of the TDD uplink/downlink configurations in the TDD uplink/downlink configuration used by the multiple cells, the terminal uses some or all of the selected TDD uplink/downlink configurations through RRC signaling or MAC signaling. The identification information of the cell is sent to the base station.

The method according to claim 2, wherein the terminal selects a TDD uplink/downlink configuration according to an uplink/downlink configuration selection rule agreed in advance with the base station, specifically:

Selecting a TDD uplink/downlink configuration used by the cell corresponding to the cell number pre-agreed by the base station and the terminal; or selecting a TDD uplink/downlink configuration used by the first cell of the multiple cells, where the first cell is the multiple a cell with the least or largest number of PDCCH subframes included in one radio frame in the cell; or Determining the TDD uplink/downlink configuration used by the second cell in the multiple cells, where the determining method of the second cell is: determining, according to the TDD uplink/downlink configuration used by each of the multiple cells The absolute running time of the DRX-related timer, determining the cell corresponding to the longest or shortest absolute running time as the second cell; or

Select the TDD uplink/downlink configuration agreed with the base station; or

Select the TDD uplink/downlink configuration used by the cell triggered by the trigger timer.

The method according to claim 2, wherein the terminal selects a TDD uplink/downlink configuration, specifically: a TDD uplink/downlink configuration used by the terminal from multiple cells or a TDD supported by the LTE system. A TDD uplink/downlink configuration is randomly selected in the uplink/downlink configuration.

The method according to any one of claims 1 to 7, wherein the DRX related timer comprises: one or any of a continuous listening timer OnDurationTimer, an inactive timer InactivatityTimer, and a retransmission timer RetransmissionTimer. combination.

9. The method as claimed in claim 8, wherein the TDD uplink/downlink configuration selected by the terminal for different DRX related timers is the same or different.

A method for maintaining a timer in a carrier aggregation system, the method comprising:

When a plurality of cells aggregated by the terminal do not use the same time division duplex TDD uplink/downlink configuration, the base station selects a TDD uplink/downlink configuration;

The method according to claim 10, wherein the selecting a TDD uplink/downlink configuration comprises: the base station selecting a TDD uplink/downlink configuration according to a TDD uplink/downlink configuration selection rule pre-agreed with the terminal Or, the base station selects a TDD uplink/downlink configuration by itself; or

The base station selects a TDD uplink/downlink configuration used by the cell corresponding to the reference cell identifier according to the reference cell identifier that is sent by the terminal in advance by using the signaling; or

The base station selects a reference TDD uplink/downlink configuration that the terminal sends in advance through signaling.

The method according to claim 11, wherein the signaling is: radio resource control RRC signaling or media access control MAC signaling.

The method of claim 11, wherein after the base station selects a TDD uplink/downlink configuration, the method further includes: The base station configures the selected TDD uplink/downlink configuration or the TDD uplink/downlink configuration number to the terminal; or when the base station selects one of the TDD uplink/downlink configurations used by the multiple cells, the TDD uplink/downlink configuration is used. The identification information of some or all of the cells in the selected TDD uplink/downlink configuration is configured for the terminal.

The method according to claim 13, wherein the base station configures the selected TDD uplink/downlink configuration to the terminal through RRC signaling or MAC signaling; or

After the base station selects one of the TDD uplink/downlink configurations in the TDD uplink/downlink configuration used by the multiple cells, the base station uses the RRC signaling or MAC signaling to use some or all of the selected TDD uplink/downlink configurations. Identification information, configured to the terminal.

The method according to claim 11, wherein the base station selects a TDD uplink/downlink configuration according to a TDD uplink/downlink configuration selection rule that is pre-agreed with the terminal, specifically:

Selecting a TDD uplink/downlink configuration used by the cell corresponding to the cell number pre-agreed by the base station and the terminal; or selecting a TDD uplink/downlink configuration used by the first cell of the multiple cells, where the first cell is the multiple a cell with the least or largest number of PDCCH subframes included in one radio frame in the cell; or

Select the TDD uplink/downlink configuration agreed with the terminal; or,

The method according to claim 11, wherein the base station selects a TDD uplink/downlink configuration, specifically: a TDD uplink/downlink configuration used by the base station from multiple cells or a TDD supported by the LTE system. A TDD uplink/downlink configuration is randomly selected in the uplink/downlink configuration.

The method according to any one of claims 10-16, wherein the DRX correlation timer comprises: one or any of a continuous listening timer OnDurationTimer, an inactivity timer InactivatityTimer, and a retransmission timer RetransmissionTimer combination.

18. The method as claimed in claim 17, wherein the TDD uplink/downlink configuration selected by the base station for different DRX related timers is the same or different.

A timer maintenance device in a carrier aggregation system, the device comprising:

The uplink/downlink configuration selection unit is configured to select a TDD uplink/downlink configuration when the terminal itself aggregates or self-aggregates and the activated multiple cells do not use the same time division duplex TDD uplink/downlink configuration; a timeout time determining unit, configured to perform discontinuous reception according to the selected TDD uplink/downlink configuration and the base station configured for the terminal

Determining a timeout time of the DRX related timer, and a timer length information of the DRX related timer and a start time of the DRX related timer;

The device according to claim 19, wherein the uplink/downlink configuration selecting unit is configured to: select a TDD uplink/downlink configuration according to a TDD uplink/downlink configuration selection rule pre-agreed with the base station; or , choose one of the TDD uplink/downlink configurations; or,

Determining a TDD uplink/downlink configuration used by the cell corresponding to the reference cell identifier according to the reference cell identifier configured by the base station explicit signaling; or

The device according to claim 20, wherein the signaling is: radio resource control RRC signaling or media access control MAC signaling.

The device of claim 20, wherein the device further comprises:

Selecting an information sending unit for selecting a TDD uplink/downlink configuration by itself

Sending the selected TDD uplink/downlink configuration to the base station, or when the terminal selects one of the TDD uplink/downlink configurations used by the multiple cells, the selected TDD uplink/downlink configuration part or The identification information of all cells is sent to the base station.

The device according to claim 22, wherein the selection information sending unit is configured to:

Sending the selected TDD uplink/downlink configuration or the selected TDD uplink/downlink configuration number to the base station through RRC signaling or signaling, or

After the terminal selects one of the TDD uplink/downlink configurations in the TDD uplink/downlink configuration used by the multiple cells, the terminal uses the RRC signaling or MAC signaling to use some or all of the selected TDD uplink/downlink configurations. The identification information is sent to the base station.

The device according to claim 20, wherein the uplink/downlink configuration selection unit selects a TDD uplink/downlink configuration according to an uplink/downlink configuration selection rule that is pre-agreed with the base station, specifically:

Determining the TDD uplink/downlink configuration used by the second cell in the multiple cells, where the determining method of the second cell is: determining, according to the TDD uplink/downlink configuration used by each of the multiple cells Absolute DRX related timer The operating time is determined by determining the cell corresponding to the longest or shortest absolute running time as the second cell; or selecting the TDD uplink/downlink obtained by performing the union of the PDCCH subframes in the multiple cells and the intersection of the remaining subframes. Configuration; or,

Select the TDD uplink/downlink configuration agreed with the base station; or

The device according to claim 20, wherein the uplink/downlink configuration selection unit selects a TDD uplink/downlink configuration by specifically: the TDD uplink/downlink configuration or LTE used by the terminal from multiple cells. A TDD uplink/downlink configuration is randomly selected in the TDD uplink/downlink configuration supported by the system.

The device according to any one of claims 19-25, wherein the DRX related timer comprises: a persistent listening timer OnDurationTimer, an inactive timer InactivatityTimer, a retransmission timer

One or any combination of RetransmissionTimer.

The device according to claim 26, wherein the uplink/downlink configuration selected by the uplink/downlink configuration selection unit is the same or different for different DRX related timers.

28. A timer maintenance device in a carrier aggregation system, the device comprising:

The uplink/downlink configuration selection unit is configured to select a TDD uplink/downlink configuration when multiple cells aggregated by the terminal do not use the same time division duplex TDD uplink/downlink configuration;

The device according to claim 28, wherein the uplink/downlink configuration selecting unit is configured to: select a TDD uplink/downlink configuration according to a TDD uplink/downlink configuration selection rule pre-agreed with the terminal; or , choose one of the TDD uplink/downlink configurations; or,

Selecting, according to the reference cell identifier sent by the terminal in advance by using the signaling, the cell corresponding to the reference cell identifier

TDD up/down configuration; or,

The device according to claim 29, wherein the signaling is: radio resource control RRC signaling or media access control MAC signaling.

The device of claim 29, further comprising:

The selected TDD uplink/downlink configuration or the TDD uplink/downlink configuration number is configured for the terminal; or when the base station selects multiple After the TDD uplink/downlink configuration in the TDD uplink/downlink configuration used by the cell, the identification information of some or all of the cells in the selected TDD uplink/downlink configuration is used and configured for the terminal.

The device according to claim 30, wherein the selection information sending unit is configured to:

The selected TDD uplink/downlink configuration is configured to the terminal through RRC signaling or MAC signaling; or

After the base station selects one of the TDD uplink/downlink configurations in the TDD uplink/downlink configuration used by the multiple cells, the identities of some or all of the cells in the selected TDD uplink/downlink configuration will be used through RRC signaling or MAC signaling. Information, configured to the terminal.

The device according to claim 29, wherein the uplink/downlink configuration selection unit selects a rule according to a TDD uplink/downlink configuration that is pre-agreed with the terminal, specifically:

Select the TDD uplink/downlink configuration agreed with the terminal; or,

The device according to claim 29, wherein the self-selecting a TDD uplink/downlink configuration is specifically: the TDD uplink/downlink configuration used by the base station from multiple cells or the TDD supported by the LTE system. A TDD uplink/downlink configuration is randomly selected in the /downlink configuration.

The device according to any one of claims 28 to 34, wherein the DRX related timer comprises: a persistent listening timer OnDurationTimer, an inactive timer InactivatityTimer, a retransmission timer

One or any combination of RetransmissionTimer.

The device according to claim 35, wherein the uplink/downlink configuration selected by the uplink/downlink configuration selection unit for different DRX related timers is the same or different.