CN102201888B - Method and device for detecting multi-carrier synchronization - Google Patents

Abstract

The present invention discloses a multi-carrier synchronous detection method and device. The method includes: a user terminal detects whether the CRC check information of the downlink physical channel of each carrier in the multi-carrier is correct; and when the downlink physical channel of any carrier in the multi-carrier When the CRC check information of the channel is correct, multi-carrier synchronization is determined. The invention avoids wireless link failure.

Description

Method and device for multi-carrier synchronous detection

technical field

The present invention relates to the field of communications, in particular to a method and device for multi-carrier synchronous detection.

Background technique

In order to meet the growing demand of users for high-speed uplink packet data services, and to better cooperate with downlink high-speed downlink packet access (High Speed Downlink Packet Access, referred to as HSDPA) technology to provide support for higher service quality, the first The 3rd Generation Partnership Project (referred to as 3GPP) respectively introduced in Rel6 and Rel7 based on Wideband Code Division Multiple Access (WCDMA) and Time Division Synchronous Code Division Multiple Access (Time Division Multiple Access). Synchronous Code Division Multiple Access (TD-SCDMA) High Speed Uplink Packet Access (HSUPA) technology, or Enhanced Uplink (Enhanced Uplink) or Enhanced Dedicated Channel (Enhanced Dedicated Channel, E for short) -DCH) technology.

In terms of physical layer bearer, HSUPA introduces a new enhanced physical shared channel - Enhanced Physical Uplink Channel (E-PUCH for short) to bear the corresponding transport channel E-DCH. At the same time, in order to complete the corresponding control, scheduling and feedback, HSUPA introduces E-RUCCH, E-DCH Access Grant Channel (E-DCH Access Grant Channel, referred to as E-AGCH) and E-DCH HARQ Indicator Channel in the physical layer. (E-DCH Hybrid ARQ Indicator Channel, referred to as E-HICH) three physical control channels.

E-RUCCH is used for the UE in the CELL DCH state to request authorization for data transmission without resource authorization. The transmission method is a preemptive access method. It is the same as PRACH), and can share physical code channel with PRACH. For currently authorized user equipment (User Equipment, referred to as UE for short), the UE's current scheduling information (SI) can also be multiplexed in the protocol data unit (MAC-es Protocol) of the media access control layer entity of the E-PUCH data unit, referred to as MAC-es PDU) to Node B to achieve the purpose of scheduling requests. Scheduling information (SI) includes: power headroom, path loss, buffer size and other information.

E-AGCH is used for Node B to transmit scheduling resource authorization information to UE, which includes the following physical control information: power authorization information, time slot authorization information, code channel authorization information, temporary user network identity, and enhanced uplink control channel (Enhanced-Uplink ControlChannel (abbreviated as E-UCCH) number, resource duration indication, E-DCH cycle sequence number, E-HICH channel indication, etc.

E-HICH is used for Node B to feed back the Acknowledgment/Non-Acknowledgment (ACK/NACK) information of each transmission block to the UE. In order to reduce the physical channel overhead, E-HICH adopts the secondary expansion In the frequency way, a maximum of 80 signed users can be carried on the original physical code channel. At the same time, the user signature sequence is dynamically associated with the allocated resources, which can meet the needs of supporting large-capacity data users to be online at the same time.

The UE downlink out-of-sync mechanism in HSUPA is based on the primitives CPHY-Sync-IND and CPHY-Out-of-Sync-IND. When there is a Dedicated Physical Channel (DPCH for short), the downlink DPCH can be used as a reference for In-Sync judgment; when there is no accompanying DPCH, E-AGCH or other high-speed downlink packet access (High Speed Downlink Packet Access (HSDAP for short) downlink channels such as High Speed Shared Control Channel (High Speed Shared Control Channel, HS-SCCH for short), High Speed Physical Downlink Shared Channel (High Speed Physical Downlink Shared Channel, HS-PDSCH for short), etc. can be used As a reference for judging In-Sync, when the UE receives a correct packet of Cyclic Redundancy Check (CRC) on the above channel, it can be considered to trigger an In-Sync; if the UE is in the network When a packet with correct CRC is not received on the above channel within the configuration time window on the side, the Out of Sync report will be triggered, and the UE will start the timer T313 after receiving N313 out of sync consecutively. N315 in sync, then the UE will trigger a radio link failure event and perform cell update.

In order to further improve the throughput and peak rate of the system, 3GPP introduced multi-carrier into HSUPA. This technology can perform HSUPA transmission on multiple carriers (N carriers) in a cell. On the one hand, the uplink can obtain N times that of single-carrier HSUPA. throughput; on the other hand, it is also possible to increase the peak rate of a single terminal by N times.

However, in the above-mentioned related technologies, when the user terminal performs CRC check on the E-AGCH of the carrier that does not carry data among the multi-carriers, the CRC check will inevitably be incorrect due to the fact that there is no data carried, resulting in the reporting of Out Of The Sync message is used to trigger the counter to accumulate. Therefore, even if other carriers carrying data in the multi-carrier are in a synchronous state, the user terminal may report more than N313 Out Of Sync messages, thereby causing the base station to judge that the multi-carrier HSUPA is out of sync. That is, during the multi-carrier synchronization process, because a certain carrier in the multi-carriers (for example, the above-mentioned carrier that does not bear transmission data) is out of synchronization, it is wrongly determined that the multi-carriers are out of synchronization, and then the radio link fails.

Contents of the invention

In view of the multi-carrier HSUPA, the multi-carrier out-of-synchronization problem caused by the out-of-synchronization of a certain carrier in the multi-carrier, the present invention is proposed. Therefore, the main purpose of the present invention is to provide a method for multi-carrier out-of-synchronization detection and device to solve the above problems.

In order to achieve the above purpose, according to one aspect of the present invention, a method for multi-carrier synchronous detection is provided.

The multi-carrier synchronous detection method according to the present invention includes: the user terminal detects whether the CRC check information of the downlink physical channel of each carrier in the multi-carrier is correct; and when the CRC check information of the downlink physical channel of any carrier in the multi-carrier is correct , determine multi-carrier synchronization.

Further, the above multi-carrier synchronous detection method also includes: when the CRC verification information of the downlink physical channel of any carrier in the multi-carrier is correct, restarting the synchronization timing of other carriers in the multi-carrier except the carrier whose CRC verification information is correct device.

Further, the above multi-carrier synchronization detection method further includes: when the CRC check information of the downlink physical channel of any carrier in the multi-carrier is correct, the physical layer of the user terminal reports synchronization indication information to the high layer.

Further, the above multi-carrier synchronization detection method further includes: when the CRC check information of the downlink physical channel of each carrier in the multi-carrier is incorrect, determining that the multi-carrier is out of synchronization.

Further, the above multi-carrier synchronous detection method further includes: when the CRC check information of the downlink physical channel of each carrier in the multi-carrier is incorrect, the physical layer of the user terminal reports out-of-synchronization indication information to the high layer.

Further, the downlink physical channel may be applied to one of the following multi-carrier channels: an E-DCH access grant channel, a high-speed shared control channel, and a high-speed physical downlink shared channel.

In order to achieve the above object, according to another aspect of the present invention, a multi-carrier synchronous detection device is provided.

The device for multi-carrier synchronous detection according to the present invention includes: a detection module for detecting whether the CRC check information of each carrier in the multi-carrier is correct; and a first determination module for when the downlink physical channel of any carrier in the multi-carrier When the CRC check information is correct, multi-carrier synchronization is determined.

Further, the above-mentioned device for multi-carrier synchronous detection also includes: a plurality of synchronization timers, corresponding to each carrier in the multi-carrier; a start module, used for when the CRC check information of the downlink physical channel of any carrier in the multi-carrier When it is correct, start the synchronization timers of other carriers except the carrier whose CRC check information is correct among the plurality of synchronization timers.

Further, the above multi-carrier synchronization detection device further includes: a second determining module, configured to determine that the multi-carrier is out of synchronization when the CRC check information of the downlink physical channel of each carrier in the multi-carrier is incorrect.

Further, the above-mentioned device for multi-carrier synchronization detection further includes: a first reporting module, configured to report synchronization indication information to a high layer when the first determination module determines that multi-carrier synchronization is in progress. The second reporting module is configured to report the out-of-synchronization indication information to a high layer when the second determining module determines that the multi-carrier is out of synchronization.

Through the present invention, the user terminal detects whether the CRC information of the downlink physical channel of each carrier in the multi-carrier is correct, and when the CRC check information of the downlink physical channel of any carrier in the multi-carrier is correct, the synchronization of the multi-carrier is determined, and the multi-carrier problem is solved. The out-of-synchronization of a certain carrier leads to the problem of incorrectly determining the out-of-synchronization of multiple carriers, which avoids the failure of the wireless link.

Description of drawings

The accompanying drawings described here are used to provide a further understanding of the present invention and constitute a part of the application. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations to the present invention. In the attached picture:

FIG. 1 is a flowchart of a multi-carrier synchronization detection method according to an embodiment of the present invention;

Fig. 2 is the flow chart of the synchronous detection method of multi-carrier HSUPA according to the preferred embodiment of the present invention;

FIG. 3 is a structural block diagram of an apparatus for multi-carrier synchronous detection according to an embodiment of the present invention; and

Fig. 4 is a structural block diagram of an apparatus for multi-carrier synchronous detection according to a preferred embodiment of the present invention.

Detailed ways

It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and examples.

According to an embodiment of the present invention, a method for multi-carrier synchronous detection is provided. Fig. 1 is a flowchart of a method for multi-carrier synchronous detection according to an embodiment of the present invention. As shown in Fig. 1 , the method includes the following steps S102 to S104.

In step S102, the user terminal detects whether the cyclic redundancy check (CRC) check information of the downlink physical channel of each carrier in the multi-carrier is correct.

Step S104, when the CRC check information of the downlink physical channel of any carrier in the multi-carrier is correct, determine that the multi-carrier is synchronized.

In step S104, as long as the CRC check information of the downlink physical channel of any carrier in the multi-carrier is correct, multi-carrier synchronization is determined. In this way, in the multi-carrier synchronization process, as long as one carrier is synchronized, even if the CRC check information on the E-AGCH channel of the carrier is incorrect due to the rest of the multi-carrier carriers not carrying data, even if the user terminal reports Out Of Sync The message is accumulated by triggering the counter, because when the CRC check information of any carrier in the multi-carrier is correct, the multi-carrier synchronization can be determined, that is, in the process of multi-carrier synchronization, since only one carrier is synchronized, even if the other carriers (not carrying transmission data carrier) will not cause the base station to wrongly judge that the multi-carrier HSUPA is out of sync. Therefore, through this embodiment, it is possible to solve the problem that the out-of-synchronization of a certain carrier among the multi-carriers leads to wrongly determining that the multi-carriers are out-of-synchronization, thereby avoiding radio link failure.

Preferably, when the CRC check information of the downlink physical channel of any carrier in the multi-carrier is correct, restart the synchronization timers of other carriers in the multi-carrier except the carrier whose CRC check information is correct.

By restarting the operation of the timers of other carriers in the multi-carrier, even if the CRC check information on the E-AGCH channel of this carrier is incorrect because other carriers do not carry data to send, the synchronization timer of this carrier will not be detected due to CRC is incorrect and timed out. In this way, the success of the interaction between the user terminal and the base station can be guaranteed.

Preferably, when the CRC check information of the downlink physical channel of each carrier in the multi-carrier is incorrect, it is determined that the multi-carrier is out of synchronization.

Only when the CRC check information of each carrier in the multi-carrier is incorrect, it is determined that the multi-carrier is out of synchronization. In this way, even if the CRC check information on the E-AGCH channel of the carrier is incorrect because a certain carrier in the multi-carrier does not bear the transmission data, the user terminal even reports the Out Of Sync message to trigger the accumulation of the counter, because only when each carrier Only when the CRC check information is incorrect can the multi-carrier out-of-synchronization be determined, that is, in the process of multi-carrier synchronization, the base station will not judge the multi-carrier HSUPA out-of-synchronization due to a certain carrier out-of-synchronization. Therefore, it is possible to solve the problem that the out-of-synchronization of a certain carrier among the multi-carriers leads to the wrong determination of the out-of-synchronization of the multi-carriers, thereby avoiding the failure of the radio link.

Preferably, when the CRC check information of the downlink physical channel of each carrier in the multi-carrier is incorrect, the physical layer of the user terminal reports the out-of-sync indication information Out of Sync to the high layer. When the CRC check information of any carrier in the multi-carrier is correct, the physical layer of the user terminal reports the synchronization indication information In-Sync to the upper layer.

Preferably, the downlink physical channel can be applied to a channel in one of the following multi-carriers: E-AGCH, High Speed Shared Control Channel (HS-SCCH for short), High Speed-Physical Downlink Shared Channel (High Speed PhysicalDownlink Shared Channel, referred to as HS-PDSCH).

The implementation process of the above-mentioned embodiments will be described in detail below in conjunction with preferred embodiments and accompanying drawings.

Fig. 2 is a flowchart of a method for synchronous detection of multi-carrier HSUPA according to a preferred embodiment of the present invention, including the following steps S202 to S216.

Step S202, the radio network controller (Radio Network Controller, referred to as RNC) configures the HSUPA carrier resource pool to the NodeB through the Iub port signaling such as wireless link establishment/reconfiguration, etc. and specifies the working carrier, and the NodeB responds back to the RNC, wherein It carries the carrier resource allocated to the UE actually used.

In step S204, the RNC notifies the UE of the carrier resources used by the UE through an air interface message such as RB establishment/reconfiguration.

In step S206, the terminal performs the HSUPA access process through the E-RUCCH on the working carrier and sends the scheduling information to the NodeB.

Step S208, the NodeB selects the carrier resources actually used by the UE to send data from the carrier resources allocated to the UE in step S202 according to the scheduling information, and transmits the UE on the corresponding carrier through the absolute authorization information carried by the E-AGCH corresponding to each carrier. The resource authorization information actually used by the data is notified to the UE.

Step S210, the terminal detects the E-AGCH on the carrier allocated by the network side.

In step S212, the terminal checks whether the CRC check information is correct on the carrier allocated by the network side. If it is correct, go to step S214, otherwise go to step S216.

In step S214, the physical layer of the terminal reports In-Sync to the upper layer and restarts the synchronization timers of all carriers.

In this preferred embodiment, when the terminal detects that the CRC is correct on the E-AGCH channel of a carrier, in addition to restarting the synchronization timer of the carrier, it will also restart the synchronization timers of all other carriers, so that even if there is no data to send The synchronization timer of the carrier will not time out because the CRC has been detected to be incorrect, and it will not trigger the report of Out of Sync.

It is also shown in the present invention that in the multi-carrier HSUPA system, as long as the downlink synchronization of one carrier is detected, it can be considered that the downlink of other carriers is also synchronized.

Step S216, the terminal continues to detect the E-AGCH and check the CRC check information on the designated carrier allocated by the network side, that is, go to step S210.

In this preferred embodiment, if the synchronization timer exceeds the time window configured on the network side, the physical layer of the terminal is triggered to report Out of Sync to the upper layer.

This preferred embodiment also shows that in the multi-carrier HSUPA system, only when the E-AGCH of all carriers does not receive a correct CRC packet within a long period of time in the configuration window on the network side, that is, when the synchronization timer expires, the Out of Sync is triggered to be reported. The sync timer restarts after sending Out of Sync.

Those skilled in the art should understand that the multi-carrier HSUPA synchronization detection method shown in Figure 2 is a special example for illustrating the solution of the present invention and is not intended to limit the present invention. The synchronization detection mechanism is also applicable to downlink channels such as HS-PDSCH or downlink DPCH channels.

According to an embodiment of the present invention, a device for multi-carrier synchronous detection is also provided, and the device can be used to implement the above method for multi-carrier synchronous detection. FIG. 3 is a structural block diagram of an apparatus for multi-carrier synchronous detection according to an embodiment of the present invention. As shown in FIG. 3 , it includes a detection module 32 and a first determination module 34 . The above structure will be described in detail below.

The detection module 32 is used to detect whether the CRC check information of the downlink physical channel of each carrier in the multi-carrier is correct; the first determination module 34 is connected to the detection module 32 and is used for any carrier in the multi-carrier detected by the detection module 32 When the CRC check information of the downlink physical channel is correct, it is determined that the multi-carrier is synchronized.

When the above-mentioned first determination module 34 determines the multi-carrier synchronization, as long as the CRC check information of the downlink physical channel of any carrier in the multi-carrier is correct, the multi-carrier synchronization is determined. In this way, in the multi-carrier synchronization process, as long as one carrier is synchronized, even if the CRC check information on the E-AGCH channel of the carrier is incorrect due to the rest of the multi-carrier carriers not carrying data, even if the user terminal reports Out Of Sync The message is accumulated by triggering the counter, because when the CRC check information of the downlink physical channel of any carrier in the multi-carrier is correct, the multi-carrier synchronization can be determined, that is, in the process of multi-carrier synchronization, since only one carrier is synchronized, even the other carriers The out-of-sync (carrier that does not bear the transmission data) will not cause the base station to wrongly judge that the multi-carrier HSUPA is out of sync. Therefore, through this embodiment, it is possible to solve the problem that the out-of-synchronization of a certain carrier among the multi-carriers leads to wrongly determining that the multi-carriers are out-of-synchronization, thereby avoiding radio link failure.

Fig. 4 is a structural block diagram of an apparatus for multi-carrier synchronous detection according to a preferred embodiment of the present invention.

Preferably, the above-mentioned device for multi-carrier out-of-sync detection further includes: a second determination module 42 , a plurality of synchronization timers 44 , a startup module 46 , a first reporting module 48 and a second reporting module 49 . The above structure will be described in detail below.

The second determination module 42 is connected to the detection module 32, and is used for determining that the multi-carrier is out of synchronization when the CRC check information of the downlink physical channel of each carrier in the multi-carrier detected by the detection module 32 is incorrect.

Only when the CRC check information of the downlink physical channel of each carrier in the multi-carrier is incorrect, it is determined that the multi-carrier is out of synchronization. In this way, even if the CRC check information on the E-AGCH channel of the carrier is incorrect because a certain carrier in the multi-carrier does not bear the transmission data, the user terminal even reports the Out Of Sync message to trigger the accumulation of the counter, because only when each carrier Only when the CRC check information is incorrect can the multi-carrier out-of-synchronization be determined, that is, in the process of multi-carrier synchronization, the base station will not judge the multi-carrier HSUPA out-of-synchronization due to a certain carrier out-of-synchronization. Therefore, through this embodiment, it is possible to solve the problem that the out-of-synchronization of a certain carrier among the multi-carriers leads to wrongly determining that the multi-carriers are out-of-synchronization, thereby avoiding radio link failure.

A plurality of synchronization timers 44, corresponding to each carrier in the multi-carrier; a start module 46, connected to the detection module 32 and a plurality of synchronization timers 44, used for the downlink of any carrier in the multi-carrier detected by the detection module 32 When the CRC check information of the physical channel is correct, the synchronization timers of the carriers other than the carrier whose CRC check information is correct among the plurality of synchronization timers 44 are started.

Restart the operation of the timers of other carriers in the multi-carrier by the start module 46, even if other carriers cause the CRC check information on the carrier E-AGCH channel to be incorrect due to no bearer transmission data, the synchronization timer of the carrier will not Timed out because an incorrect CRC condition was detected. In this way, the success of the interaction between the user terminal and the base station can be guaranteed.

The first reporting module 48 is connected to the first determining module 34, and is configured to report In-Sync to a high layer when the first determining module 34 determines that the multi-carrier is synchronized. The second reporting module 49 is connected to the second determining module 42, and is used to report Out of Sync to the upper layer when the second determining module 42 determines that the multi-carrier is out of sync.

It should be noted that the device for multi-carrier out-of-synchronization detection described in the device embodiment corresponds to the above method embodiment, and its specific implementation process has been described in detail in the method embodiment, and will not be repeated here.

In summary, according to the above-mentioned embodiments of the present invention, a method and device for multi-carrier synchronous detection are provided, and the user terminal detects whether the CRC check information of the downlink physical channel of each carrier in the multi-carrier is correct; when the multi-carrier When the CRC check information of the downlink physical channel of any carrier is correct, the multi-carrier synchronization is determined, which solves the problem of wrongly determining the multi-carrier out-of-synchronization due to the out-of-synchronization of a certain carrier in the multi-carrier, thereby avoiding the failure of the wireless link.

Obviously, those skilled in the art should understand that each module or each step of the above-mentioned present invention can be realized by a general-purpose computing device, and they can be concentrated on a single computing device, or distributed in a network formed by multiple computing devices Optionally, they can be implemented with program codes executable by a computing device, so that they can be stored in a storage device and executed by a computing device, or they can be made into individual integrated circuit modules, or they can be integrated into Multiple modules or steps are fabricated into a single integrated circuit module to realize. As such, the present invention is not limited to any specific combination of hardware and software.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims (8)

1. a method for multi-carrier synchronization detection, is characterized in that, comprising:

Whether the cyclic redundancy check (CRC) check information that user terminal detects the down physical channel of each carrier wave in multicarrier is correct; And

When the CRC check information of the down physical channel of carrier wave any in described multicarrier is correct, determine described multi-carrier synchronization;

When the CRC check information of the down physical channel of each carrier wave in described multicarrier is all incorrect, determine described multicarrier step-out.

2. method according to claim 1, is characterized in that, also comprises:

When the CRC check information of the down physical channel of carrier wave any in described multicarrier is correct, restart the synchro timer of other carrier wave except the correct carrier wave of CRC check information in described multicarrier.

3. method according to claim 1, is characterized in that, also comprises:

When the CRC check information of the down physical channel of carrier wave any in described multicarrier is correct, the physical layer of described user terminal reports synchronous indication information to high level.

4. method according to claim 1, is characterized in that, also comprises:

When the CRC check information of the down physical channel of each carrier wave in described multicarrier is all incorrect, the physical layer of described user terminal reports step-out indication information to high level.

5. method according to any one of claim 1 to 4, is characterized in that, described down physical channel can be applied to the channel in one of following described multicarrier:

Strengthen dedicated channel E-DCH insertion authority channel, High-Speed Shared Control Channel, high-speed physical downlink shared channel (HS-PDSCH).

6. a device for multi-carrier synchronization detection, is characterized in that, comprising:

Detection module, whether correct for the CRC check information detecting each carrier wave in multicarrier; And

First determination module, when the CRC check information for the down physical channel when carrier wave any in described multicarrier is correct, determines described multi-carrier synchronization;

Second determination module, when the CRC check information for the down physical channel when each carrier wave in described multicarrier is all incorrect, determines described multicarrier step-out.

7. device according to claim 6, is characterized in that, also comprises:

Multiple synchro timer, corresponding with each carrier wave in described multicarrier;

Start module, when the CRC check information for the down physical channel when carrier wave any in described multicarrier is correct, start the synchro timer of other carrier wave except the correct carrier wave of CRC check information in described multiple synchro timer.

8. device according to claim 6, is characterized in that, also comprises:

First reporting module, for when described first determination module determines described multi-carrier synchronization, reports synchronous indication information to high level;

Second reporting module, for when described second determination module determines described multicarrier step-out, reports step-out indication information to high level.