WO2012171393A1

WO2012171393A1 - Method and device for transmitting system information

Info

Publication number: WO2012171393A1
Application number: PCT/CN2012/073347
Authority: WO
Inventors: 张�杰; 彭莹; 梁靖; 房家奕
Original assignee: 电信科学技术研究院
Priority date: 2011-06-17
Filing date: 2012-03-30
Publication date: 2012-12-20
Also published as: CN102223690A

Abstract

Disclosed is a method for transmitting system information, for realizing the transmission of system information and reducing interference when transmitting system information. The base station side method includes: a base station determining user equipment (UE) in a coverage hole; and the base station sending user specific signalling carrying system information to the UE in the coverage hole. The UE side method includes: UE receiving user specific signalling carrying system information; and the UE obtaining the system information from the user specific signalling. Also disclosed is a device for implementing the method.

Description

Method and device for transmitting system information This application claims priority to Chinese patent application filed on June 17, 2011, the Chinese Patent Office, Application No. 201110163975.2, entitled "Method and Apparatus for Transmitting System Information" The entire contents of which are incorporated herein by reference. TECHNICAL FIELD The present invention relates to the field of communications, and in particular, to a method and apparatus for transmitting system information. In the scenario of a hybrid network of a macro base station (Me B ) / a micro base station (Pe B ), as shown in FIG. 1 , in order to improve the resource usage efficiency of the micro base station, the handover bias may be increased. The base station performs coverage extension, so that more UEs access the micro base station. Wherein, the area of the extended coverage (RE) is as shown in the area between the two broken lines in FIG. At this time, the UE (User Equipment) (such as UE1 in Figure 1) that is forced to access the micro base station is subject to strong interference from the macro base station. To solve this problem, LTE (Long Term Evolution) R10 (version 10) introduces time division multiplexing inter-cell interference coordination (TDM) (Time Division Multiplexing) ICIC. For the TDM ICIC mechanism, refer to the schematic diagram of the subframe structure shown in FIG. 2. In the macro base station, some subframes are configured as ABS (Almost Blank Subframe), and the scheduling of the data domain is stopped on these subframes, and only the cell is transmitted. The Common Reference Signal (CRS) does not generate strong interference to the UE under the micro base station.

The TDM ICIC mechanism can solve the interference of the traffic channel (such as the Physical Downlink Shared Channel (PDSCH)), but cannot solve the system information (including the main system information block (MIB) and the system information block (SIB). Information) Suffering from the interference. SUMMARY OF THE INVENTION Embodiments of the present invention provide a method and apparatus for transmitting system information, which are used to implement system information transmission and reduce interference when transmitting system information.

A method for transmitting system information, applied to a base station side, includes the following steps:

Determining, by the base station, the user equipment UE that is in the coverage hole;

The base station transmits user-specific signaling with system information to the UE in the coverage hole.

A method for transmitting system information, applied to the UE side, includes the following steps:

The UE receives user-specific signaling with system information;

The UE obtains system information from user-specific signaling. A base station comprising:

a control module, configured to determine a user equipment UE that is in a coverage hole;

The interface module is configured to send user-specific signaling with system information to the UE in the coverage hole.

A user equipment, including:

An interface module, configured to receive user-specific signaling with system information;

And a control module, configured to obtain system information from user-specific signaling.

The embodiment of the present invention transmits system information through user-specific signaling, and the transmission location of the user-specific signaling is relatively flexible, which can solve the interference problem caused by transmitting system information at a fixed location in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic diagram of a network architecture in the prior art;

2 is a schematic diagram of a subframe structure in the prior art;

3 is a flowchart of a main method for transmitting system information on a network side according to an embodiment of the present invention;

4 is a flowchart of a detailed method for transmitting system information on the network side according to an embodiment of the present invention;

FIG. 5 is a flowchart of a main method for transmitting system information on a UE side according to an embodiment of the present invention;

6 is a flowchart of a detailed method for transmitting system information on a UE side according to an embodiment of the present invention;

7 is a flowchart of a method for transmitting system information after a UE performs a forced handover by a base station that initiates a interference suppression mechanism according to an embodiment of the present invention;

FIG. 8 is a flowchart of a method for transmitting system information when a base station performs statistical feedback on a UE moving to a cell edge to determine reliability in an embodiment of the present invention;

FIG. 9 is a flowchart of a method for a base station that initiates a interference suppression mechanism to transmit system information to a UE moving to a cell edge according to an embodiment of the present invention;

FIG. 10 is a structural diagram of a base station according to an embodiment of the present invention;

FIG. 11 is a structural diagram of a UE according to an embodiment of the present invention. The embodiments of the present invention transmit system information through user-specific signaling, and the transmission location of the user-specific signaling is relatively flexible, which can solve the interference problem caused by transmitting system information at a fixed location in the prior art.

The user-specific signaling in this embodiment may be RRC (Radio Resource Control) signaling, etc. Preferably, a resource with better channel shield is selected to transmit user-specific signaling, such as in a hash source setting. Transmitted within sub-frames of ABS. The base station in this embodiment may be a micro base station or a macro base station or the like.

Referring to FIG. 3, the main method flow of transmitting system information on the network side in this embodiment is as follows: Step 301: The base station determines the UE that is in the coverage hole.

Step 302: The base station sends user-specific signaling with system information to the UE in the coverage hole.

In order to avoid repeated transmissions and to ensure the reliability of transmission during transmission, the base station needs to determine whether it is necessary to transmit system information and whether the transmission is reliable before transmitting user-specific signaling. For the specific implementation, refer to the following procedure.

Referring to FIG. 4, the detailed method flow of transmitting system information on the network side in this embodiment is as follows:

Step 401: The base station maintains the UE in the list A, that is, determines the UE that is in the coverage hole, and records it in the list A. In order to facilitate the management and maintenance of the UE, the UE that is in the coverage hole is recorded in the list A in this embodiment.

The following steps are performed for each UE of list A.

Step 402: The base station determines whether the UE can reliably transmit the user-specific signaling, and if yes, proceeds to step 404, otherwise proceeds to step 403.

Step 403: The base station records abnormal information for the UE. If the base station finds that the terminal cannot correctly know the system information and cannot use the user-specific signaling to notify the system information, it will judge that the terminal cannot work normally, and record the corresponding information for later use and reference.

Step 404: The base station determines whether the UE has current system information, and if yes, ends the process, otherwise proceeds to step 405.

Step 405: The base station sends user-specific signaling with system information to the UE in the coverage hole.

In step 401, there are multiple ways to determine the UE that is in the coverage hole. For example, for a UE that satisfies at least one of the following conditions, the base station determines that the UE is a UE that is in coverage hole. The conditions include: For the UE that completes the handover, the handover is forced to be switched; the CQI (Channel Quality Indicator) reported by the UE is lower than the preset CQI threshold; the RSRQ (Reference Signal Receiving Quality, Reference Signal) reported by the UE The receiving shield is lower than the preset RSRQ threshold; the RSRP (Reference Signal Receiving Power) reported by the UE is lower than the preset RSRP threshold; the RSRQ of the local area reported by the UE within the preset duration is The RSRQ threshold is lower than the preset RSRQ threshold. The RSRP of the local area reported by the UE is lower than the preset RSRP threshold. The RSRQ of the local area reported by the UE is lower than the preset RSRQ difference threshold. The RSRP of the local area reported by the UE is lower than the preset RSRP difference threshold of the neighboring cell.

There are two cases in which the UE is in the coverage hole, one is the coverage hole of the current cell after the UE handover, and the other is the coverage hole moved by the UE from the cell center to the cell. For the first case, especially in the case of forced handover, the UE is likely to be in the coverage hole. In the above condition, whether the UE is mandatory switching can be determined by the following conditions: For the UE that completes the handover, the handover is forced to be switched. The base station that belongs to the UE after the UE handover can obtain the handover information from the base station to which the UE belongs before the handover through the X2 interface (an interface between the base stations), and judge whether the handover is a forced handover according to the handover information. Specifically, the handover information may be carried in a handover request. The CQI reported by the UE is lower than the preset CQI threshold. For example, the UE is required to perform channel state information feedback immediately after the handover, if the CQI is lower than

The CQI threshold can be determined to be a forced switch. The RSRQ of the local area reported by the UE is lower than the preset RSRQ threshold. If the measurement reporting condition is configured immediately after the handover, if the RSRQ of the local area reported by the UE is lower than the RSRQ threshold, it can be determined that the handover is a forced handover. The RSRP of the local area reported by the UE is lower than the preset RSRP threshold. For example, the measurement reporting condition is configured immediately after the handover. If the RSRP of the local area reported by the UE is lower than the RSRP threshold, the handover can be determined as a forced handover. The RSRQ of the local area reported by the UE is lower than the preset RSRQ difference threshold of the adjacent cell (the neighboring cell). For example, the measurement reporting condition is configured immediately after the handover. If the RSRQ of the local area reported by the UE is lower than the RSRQ difference of the adjacent area, the adjacent area is lower than the RSRQ difference. The value threshold can be determined to be mandatory. The RSRQ in this area is lower than the RSRQ difference threshold in all neighboring areas, and is determined to be forced switching, or the RSRQ in this area is lower than the RSRQ difference threshold in a neighboring area, and is determined to be mandatory. Switch. The RSRP of the local area reported by the UE is lower than the preset RSRP difference threshold of the neighboring cell. For example, the measurement reporting condition is configured immediately after the handover. If the RSRP ratio of the local area reported by the UE is lower than the RSRP difference threshold, the UE may determine the Switching to forced switching, where the RSRP in this area is lower than the RSRP difference threshold in all neighboring areas, it is determined to be forced switching, or the RSRP in this area is lower than the RSRP difference threshold in a neighboring area, and is determined to be forced switching.

For the second case, in the above condition, whether the UE moves from the cell center to the coverage hole is determined by the following conditions: The RSRQ of the local area reported by the UE in the preset duration is lower than the preset RSRQ threshold. Make sure the UE moves into the system information coverage hole. The RSRP of the local area reported by the UE in the preset duration is lower than the preset RSRP threshold, and it can be determined that the UE moves into the system information coverage hole. The RSRQ of the local area reported by the UE is lower than the preset RSRQ difference threshold of the neighboring cell (the neighboring cell), and the UE may be determined to move into the system information coverage hole, wherein the RSRQ of the local area is lower than the RSRQ difference of all neighboring areas. The value threshold determines whether the UE moves into the system information coverage hole, or the RSRQ in this area is lower than the RSRQ difference threshold in a neighboring area, and determines that the UE moves into the system information coverage hole. The RSRP of the local area reported by the UE is lower than the preset RSRP difference threshold of the neighboring cell, and the UE may be determined to move into the system information coverage hole. The RSRP of the local area is lower than the RSRP difference threshold of all neighboring areas, and the UE is determined to be moved in. The system information covers the hole, or the RSRP in this area is lower than the RSRP difference threshold in a neighboring area, and it is determined that the UE moves into the system information coverage hole.

In order to improve the transmission capacity of the user-specific signaling, the UE can ensure reliable reception of the system information. Preferably, the base station determines whether the user-specific information can be reliably transmitted before transmitting the user-specific signaling with the system information to the UE in the coverage hole. To enable (ie, step 402), if the user-specific signaling can be reliably transmitted, the base station transmits user-specific signaling with system information to the UE in the coverage hole. There are various specific judgment manners. For example, when the base station determines that one of the following conditions is met, it is determined that the user-specific signaling can be reliably transmitted. The conditions include: 1. The statistics of the correct response (ACK) or the error response (NACK) of the UE for the physical downlink shared channel PDSCH feedback by the base station meet the preset statistical threshold, for example, whether the ratio of the ACK to the sum of the ACK and the NACK is determined. Not less than the preset proportional threshold. If yes, it is determined that the user-specific signaling can be reliably transmitted. Otherwise, it is determined that the user-specific signaling cannot be reliably transmitted. 2. The base station supports the interference suppression mechanism on the network side, and the interference suppression mechanism such as TDM ICIC. 3. The UE supports the interference suppression mechanism on the user side, such as the interference cancellation on the UE side. Correspondingly, when the UE accesses the network, it needs to report whether the interference suppression mechanism is supported to the network side.

For step 404, the base station can determine whether there is a current system by determining whether it is a UE that is handed over to the local cell. The information, if yes, determines that the UE has no current system information, and if not, determines that the UE has current system information. The base station may also determine whether there is updated system information, and if so, determine that the UE has no current system information, and if not, determine whether it is a UE that is handed over to the own cell. If there is updated system information, the base station also needs to send system information to the UE that is not in the coverage hole, and the system information can be sent through broadcast signaling.

The system information in this embodiment includes at least one of the information listed in Table 1:

Table 1

Small and cell reselection parameters. System Information Block 9 (SIB9) carries only the identification information of the Home Node B (Home Base Station). System Information Block 10 (SIB10) carries the main notifications for the Earthquake and Tsunami Warning System, including the message identification number, serial number, alarm type, and alarm security information. The system information block 11 (SIB11) carries the auxiliary notification for alerting the ETWS, including the message identification number, the serial number, the segmentation information of the alarm message, the segment number, the segment, the data coding scheme, and the like.

The user-specific signaling in this embodiment may use the existing format (including the field length and the order between the system information blocks, etc.) to transmit system information, or may select system information according to actual needs, and configure corresponding field lengths and Order and so on. The base station and the UE can configure a unified rule.

Since the user-specific signaling is transmitted for one UE, and the transmission delay is uncertain, in order to facilitate the application of system information by the UE that is in the coverage hole and the UE that is not in the coverage hole (that is, in the cell center), the user-specific signaling further includes The time when the system information is valid. When the system information is valid, the base station sends broadcast signaling with system information, which is the latest system information, which may be the updated system information.

In order to facilitate the UE to know that the currently transmitted user-specific signaling carries system information, the specific information in the user-specific signaling may carry system information, and the specific bit is configured to be dedicated to system information; or, the user-specific signaling is further It includes a bit for indicating whether to carry system information, for example, the value of the bit is 1, indicating that system information is carried, and a value of 0 indicates that system information is not carried.

In this embodiment, the process shown in FIG. 4 may be triggered when the UE joins the list A, or the process shown in FIG. 4 may be triggered when the system information is updated. If the UE moves from the coverage hole to the cell center or needs to switch to another cell, the base station deletes the UE from the list A, and notifies the UE to resume normal system information detection through user-specific signaling.

Referring to FIG. 5, the main method flow of transmitting system information on the UE side in this embodiment is as follows:

Step 501: The UE receives user-specific signaling with system information.

Step 502: The UE obtains system information from user-specific signaling.

In this embodiment, the UE has the situation that both the system information is obtained from the user-specific signaling and the conventional system information is detected. The following describes how to coordinate the processing in the two cases.

Referring to FIG. 6, the detailed method flow of transmitting system information on the UE side in this embodiment is as follows:

Step 601: The UE receives user-specific signaling with system information.

Step 602: The UE obtains the effective time of the system information and the system information from the user-specific signaling. When a particular bit in user-specific signaling carries system information, the UE obtains system information from a particular bit in user-specific signaling. When the user-specific signaling further includes a bit for indicating whether to carry the system information, the UE recognizes that the information carried by the bit for indicating whether to carry the system information indicates that the system information is obtained, and the system is obtained from the user-specific signaling. information.

Step 603: The UE stops detecting the system information in the broadcast signaling, that is, stops the normal system information detection. This step saves the energy consumption of the UE. The UE may stop the normal system information detection immediately upon receiving the user-specific signaling with system information, or stop receiving the conventional system information detection instruction (which can also be transmitted through the user-specific signaling). System information detection.

Step 604: The UE applies the obtained system information when the system information is valid.

Step 605: Upon reaching the effective time for recovering the information of the broadcast signaling system, the UE resumes the detection of the system information in the broadcast signaling. The effective time of the recovery broadcast signaling system information detection is notified by the base station to the UE or for a fixed configuration (the effective time is defined by the standard). Or, the UE is waiting to receive the user-specific signaling with the recovery detection indication information, where the recovery detection indication information is used to indicate that the UE resumes detecting the system information in the broadcast signaling, and the recovery detection indication information may include restoring the broadcast signaling system information detection. Effective time. If the recovery detection indication information does not include the effective time for recovering the broadcast signaling system information detection, the UE immediately resumes the broadcast signaling system information detection when receiving the recovery detection indication information. If the recovery detection indication information includes the effective time for recovering the broadcast signaling system information detection, the UE resumes the broadcast signaling system information detection upon reaching the effective time of the restoration broadcast signaling system information detection. Or, when the UE determines that the measurement information is not lower than the preset threshold, recovering the detection of the system information in the broadcast signaling, for example, when the UE determines that the measured RSRQ is not lower than a preset RSRQ threshold, restoring the system information in the broadcast signaling. Detection. Measurement information includes RSRQ, RSRP, and CQI.

If the UE does not stop detecting the system information in the broadcast signaling, the UE obtains the system information through the user-specific signaling in a short time and obtains the system information through the broadcast signaling, and then uses the system information that is successfully detected last time. . If the last system information is transmitted by broadcast signaling, the system information takes effect immediately. If the last system information is transmitted by the user-specific signaling, the system information takes effect when the effective time is reached.

In the implementation process of the foregoing base station side and the UE side, each step may have multiple implementation manners, which are described in detail below through several embodiments.

Referring to FIG. 7, the method for transmitting the system information after the UE performs the handover by the base station that starts the interference suppression mechanism in this embodiment is as follows:

Step 701: The UE forcibly switches to the current cell.

Step 702: The base station records the UE into the list A according to the handover information.

Step 703: The base station determines whether the local interference suppression mechanism is enabled, and if yes, proceeds to step 704, otherwise proceeds to step 705.

Step 704: The base station sends user-specific signaling with system information to the UE in the coverage hole.

Step 705: The base station records abnormal information for the UE. For example, the base station B1 forcibly switches the terminal U1 to the base station NB2, and B2 records the U1 into the system information coverage hole list A according to the switching information. B2 has activated the TDM ICIC mechanism to ensure that U1 reliably obtains user-specific signaling. B2 notifies U1 of one or more of carrier frequency, carrier bandwidth, random access information, configuration information of various channels, and radio resource configuration information by using user-specific signaling. Ul updates the system information stored by itself according to the content of user-specific signaling. If U1 is still located in the extended coverage area of B2 (ie, coverage hole) when the system information is updated, B2 uses the user-specific signaling to notify the U1 system information update, and notifies the system information update effective time Time1. After Timel arrives, B2 uses other conventional methods to update system information to other UEs.

After U1 moves to the normal coverage area of B2 (ie, the cell center), B2 deletes U1 from list A according to the measurement report of U1 and finds that U1 has moved out of the system information coverage hole. U1 can detect system information updates in the usual way, and use this result to update the system information stored by itself.

Referring to FIG. 8, in the embodiment, when the base station performs statistical feedback on the UE to the edge of the cell to determine the reliability, the method for transmitting the system information is as follows:

Step 801: The UE moves from the cell center to the cell edge.

Step 802: The base station determines, according to the RSRP reported by the UE, that the UE is in the coverage hole and records it in the list A.

Step 803: The base station counts an ACK or a NACK sent by the UE for the PDSCH in a period of time.

Step 804: The base station determines, according to the statistical result, whether the user-specific signaling can be reliably transmitted. If yes, proceed to step 805, otherwise proceed to step 806.

Step 805: The base station sends user-specific signaling with system information to the UE in the coverage hole.

Step 806: The base station records abnormal information for the UE.

For example, the terminal U2 moves from the center of the base station B3 to the edge, and the B3 records that the U2 is in the coverage hole of the system information through the RSRP record on the U2, and records the U2 in the system information coverage hole list A. B3 confirms the ACK/NACK statistics of the PDSCH sent to U2 in a period of time. U2 can reliably obtain user-specific signaling. B3 uses user-specific signaling to notify U2 to stop normal system information detection. When system information update occurs, B3 notifies U2 of all system information by using user-specific signaling, and notifies the effective time of the update Time2. After Time2 arrives, NB3 uses the normal method to notify other users of system information updates. U2 updates its stored system information according to the content of user-specific signaling. U2—stays directly on the coverage edge of B3, and the system information is always updated through user-specific signaling.

For another example, the terminal U3 moves from the center of the base station B4 to the edge, and B4 records that the U3 is in the coverage hole of the system information through the RSRP record on the U3, and records the U3 in the system information coverage hole list A. B4 confirms that U3 can reliably obtain user-specific signaling by using the ACK/NACK statistics of the PDSCH sent to U3 for a period of time. B4 notifies U3 that routine system information detection will be stopped during time T. When the system information update occurs, B4 notifies U3 with the user-specific signaling, and notifies the effective time of the update Time3. After Time3 arrives, B4 uses the normal method to His user notifies the system information update. U3 updates its stored system information according to the content of user-specific signaling. After the timer T is terminated, U3 resumes normal system information detection.

Referring to FIG. 9, the method for the base station that starts the interference suppression mechanism in this embodiment to transmit system information to the UE moving to the cell edge is as follows:

Step 901: The UE moves from the cell center to the cell edge.

Step 902: The base station determines, according to the RSRQ reported by the UE, that the UE is in the coverage hole and records it in the list A.

Step 903: The base station determines whether the local interference suppression mechanism is enabled, and if yes, proceeds to step 904, otherwise proceeds to step 905.

Step 904: The base station sends user-specific signaling with system information to the UE in the coverage hole.

Step 905: The base station records abnormal information for the UE.

For example, the terminal U4 moves from the center of the base station B5 to the edge, and the B5 records that the U4 is in the coverage hole of the system information through the 4艮 record on the RSRQ of the U4, and records the U4 in the system information coverage hole list. B5 has activated the TDM ICIC mechanism to ensure that U4 reliably obtains user-specific signaling. B5 notifies U4 to stop the normal system information detection, and notifies U4 to resume normal system information detection when its RSRQ is higher than the threshold Threl. When system information update occurs, NB5 notifies U4 with user-specific signaling, and notifies the effective time of the update Time4. After Time4 arrives, B5 uses the normal method to notify other users of system information updates. U4 updates the system information stored by itself according to the content of user-specific signaling.

The terminal U4 moves from the edge of the base station B5 to the center, and the B5 records that the U4 is in the normal coverage of the system information through the 4 records on the RSRQ of the U4, and then removes the U4 from the system information coverage hole list. U4 finds that the RSRQ measurement result is higher than the threshold Threl, and then restores the normal system information detection.

The implementation process of the transmission system information is understood by the above description. The process is mainly implemented by the base station and the UE. The internal structure and functions of the base station and the UE are introduced below.

Referring to FIG. 10, the base station in this embodiment includes: a control module 1001 and an interface module 1002.

The control module 1001 is configured to determine the user equipment UE that is in the coverage hole.

The interface module 1002 is configured to receive and send various signaling, and in particular, to send user-specific signaling with system information to the UE in the coverage hole. User-specific signaling also includes the effective time of system information. The interface module 1002 is further configured to send broadcast signaling with system information when the system information is valid. The specific bit in the user-specific signaling carries system information; or, the user-specific signaling further includes a bit for indicating whether to carry system information. The user-specific signaling is further used to instruct the UE to stop the broadcast signaling system information detection. The interface module 1002 is further configured to send, to the UE, indication information indicating that the broadcast signaling system information is detected.

For a UE that satisfies at least one of the following conditions, the control module 1001 determines that the UE is a UE that is in coverage holes. The conditions include: for the UE that completes the handover, the handover is forced to be switched; the CQI reported by the UE is lower than the preset CQI threshold; The RSRQ of the local area reported by the UE is lower than the preset RSRQ threshold; the RSRP of the local area reported by the UE is lower than the preset RSRP threshold; the RSRQ of the local area reported by the UE within the preset duration is lower than the preset RSRQ threshold; The RSRP of the local area reported in the preset duration is lower than the preset RSRP threshold; the RSRQ of the local area reported by the UE is lower than the preset RSRQ difference threshold of the neighboring cell; the RSRP ratio of the local area reported by the UE The RSRP of the neighboring cell is lower than the preset RSRP difference threshold. The control module 1001 obtains the handover information through the X2 interface, and determines that the handover is a forced handover when it is determined that the handover information indicates a forced handover. Preferably, the handover information is carried in the handover request.

The control module 1001 is further configured to determine whether the user-specific signaling can be reliably transmitted at present. If the user-specific signaling can be reliably transmitted, the interface module 1002 sends user-specific signaling with system information to the UE in the coverage hole.

The control module 1001 determines that the user-specific signaling can be reliably transmitted at the time when one of the following conditions is satisfied. The condition includes: the statistics of the correct response ACK or the error acknowledgement NACK of the UE for the physical downlink shared channel PDSCH feedback by the control module 1001 meet the preset statistical threshold; the base station supports the interference suppression mechanism on the network side; Disturbance suppression mechanism. For the case where the UE supports the user-side interference suppression mechanism, when the UE accesses the network, the control module 1001 obtains information reported by the UE for indicating whether the interference suppression mechanism is supported, and determines that the information indicates that the interference suppression mechanism is supported. When it is determined, the UE supports the interference suppression mechanism on the user side.

System information includes at least one of the following information:

Downstream bandwidth, PHICH configuration information, system frame number (SFN), information related to cell access, parameters related to cell selection, maximum transmit power, frequency band information, scheduling information of system information, time division duplex TDD configuration parameters, SI window length, SystemlnfoValueTag, access barring information, radio resource configuration information, terminal timer and some constant information, frequency information, multimedia broadcast multicast single frequency network MBSFN subframe configuration information, synchronization timer information, cell reselection Common parameters, cell reselection parameters of the service frequency, related parameters of co-frequency cell reselection, co-frequency cell information, co-frequency blacklist cell information, physical cell identity of the CSG cell, and its range, inter-frequency carrier information, used for Relevant information for cell reselection to the UTRA system, related information for cell reselection to the GERAN system, related information for cell reselection to the CDMA2000 system, identification information carrying only the home base station Home Node B, carrying the warning for the ETWS The main notice, carrying an auxiliary notice for warning ETWS.

Referring to FIG. 11, the user equipment in this embodiment includes: an interface module 1101 and a control module 1102.

The interface module 1101 is configured to receive user-specific signaling with system information. The interface module 1101 is further configured to report information indicating whether the interference suppression mechanism is supported when accessing the network.

Control module 1102 is for obtaining system information from user-specific signaling.

The interface module 1101 is further configured to receive broadcast signaling with system information. The control module 1102 is also used to retrieve the most recently received system information.

The specific bits in the user-specific signaling carry system information. Control module 1102 obtains system information from specific bits in user-specific signaling. Alternatively, the user-specific signaling further includes a bit for indicating whether to carry system information. The control module 1102 identifies that the information carried by the bit for indicating whether to carry the system information represents system information. At the time, system information is obtained from user-specific signaling.

After receiving the user-specific signaling with system information, the interface module 1101 stops detecting the system information in the broadcast signaling.

User-specific signaling also includes the effective time of system information. The control module 1102 is further configured to apply the obtained system information when the time of the system information is reached. The control module 1102 resumes the detection of the system information in the broadcast signaling when it reaches the effective time to resume the detection of the system information in the broadcast signaling. Alternatively, the interface module 1101 is further configured to receive user-specific signaling with recovery detection indication information, where the recovery detection indication information is used to indicate that the UE resumes detection of system information in the broadcast signaling. Alternatively, the control module 1102 is further configured to resume detection of system information in the broadcast signaling when the measurement information is not lower than a preset threshold.

The embodiment of the present invention transmits system information through user-specific signaling, and the transmission location of the user-specific signaling is relatively flexible, which can solve the interference problem caused by transmitting system information at a fixed location in the prior art. In the embodiment of the present invention, before the system information is transmitted, the reliability of the transmission is also determined, so that the UE can obtain the system information reliably. Also, check if the UE has system information to avoid repeated transmission. When the UE obtains system information through user-specific signaling, the UE can stop normal system information detection to save energy. Embodiments of the present invention provide a variety of implementations for almost every aspect to accommodate the needs of various network environments or communication systems.

Those skilled in the art will appreciate that embodiments of the present invention can be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or a combination of software and hardware. Moreover, the present invention can be embodied in the form of a computer program product embodied on one or more computer-usable storage interfaces (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer usable program code.

The present invention has been 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 process 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 apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.

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, thereby causing a computer or other The instructions executed on the programmable device provide steps for implementing the functions specified in one or more blocks of the flowchart or in a flow or block of the flowchart.

Although the preferred embodiment of the invention has been described, it will be apparent to those of ordinary skill in the art that <RTIgt; Therefore, the appended claims are intended to be construed as including the preferred embodiments and the modifications

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 inventions

Claims

Rights request

A method for transmitting system information, comprising the steps of:

The method of claim 1, wherein the determining, by the base station, the user equipment UE that is in the coverage hole comprises: determining, by the base station, that the UE is at least one of the following conditions, determining that the UE is a UE that is in a coverage hole; Conditions include:

For the UE that completes the handover, switch to forced handover;

The channel shield quantity indicated by the UE indicates that the CQI is lower than a preset CQI threshold;

The reference signal receiving shield RSRQ reported by the UE is lower than the preset RSRQ threshold;

The reference signal received by the UE, the received power RSRP, is lower than the preset RSRP threshold;

The RSRQ of the local area reported by the UE in the preset duration is lower than the preset RSRQ threshold;

The RSRP of the local area reported by the UE in the preset duration is lower than the preset RSRP threshold;

The RSRQ of the local area reported by the UE is lower than the preset RSRQ difference threshold of the neighboring cell;

The RSRP of the local area reported by the UE is lower than the preset RSRP difference threshold of the neighboring cell.

The method of claim 2, wherein the determining, by the base station, that the handover is a mandatory handover comprises: the base station obtaining the handover information by using the X2 interface, and determining that the handover is a forced handover when determining that the handover information indicates a forced handover .

4. The method according to claim 3, wherein the handover information is carried in a handover request.

The method according to claim 1, wherein before the base station sends the user-specific signaling with the system information to the UE in the coverage hole, the method further includes: the base station determining whether the user-specific signaling can be reliably transmitted; If the user-specific signaling can be reliably transmitted, the base station sends user-specific signaling with system information to the UE in the coverage hole.

The method of claim 5, wherein the step of determining, by the base station, whether the user-specific signaling can be reliably transmitted comprises: determining that the user-specific signaling can be reliably transmitted when the base station determines that one of the following conditions is met; the conditions include:

The statistics of the correct response ACK or the error response of the UE for the physical downlink shared channel PDSCH are calculated by the base station to meet the preset statistical threshold.

The base station supports a interference suppression mechanism on the network side;

The UE supports the interference suppression mechanism on the user side.

The method according to claim 6, wherein the determining, by the base station, that the UE supports the interference suppression mechanism on the user side comprises: when the UE accesses the network, the base station obtains, by the UE, whether the interference suppression is supported by the UE. Mechanical Information, when the information indicates that the interference suppression mechanism is supported, the base station determines that the UE supports the interference suppression mechanism on the user side.

The method according to claim 1, wherein the system information includes at least one of the following information: a downlink bandwidth, a physical hybrid automatic request retransmission indication channel PHICH configuration information, a system frame number SFN, and a cell access related Information, parameters related to cell selection, maximum transmit power, frequency band information, scheduling information of system information, time division duplex TDD configuration parameters, scheduling information SI window length, system information change identifier SystemlnfoValueTag, access barring information, radio resource configuration Information, terminal timer, and some constant information, frequency information, multimedia broadcast multicast single frequency network MBSFN subframe configuration information, synchronization timer information, common parameters of cell reselection, cell reselection parameters of service frequency, same frequency Related parameters of cell reselection, co-frequency cell information, intra-frequency blacklist cell information, physical cell identity of closed subscriber group CSG cell, and its range, inter-frequency carrier information, used for cell reselection to the universal terrestrial radio access UTRA system Information about, for use in GSM/EDGE Information about the cell reselection of the access network GERAN system, related information for cell reselection to the code division multiple access 2000 CDMA2000 system, identification information carrying only the home base station Home Node B, and carrying the warning tsunami warning system ETWS The main notice, carrying an auxiliary notice for warning ETWS.

The method according to any one of claims 1 to 8, wherein the user-specific signaling further includes an effective time of the system information.

10. The method of claim 9, further comprising the step of: transmitting, by the base station, broadcast signaling with system information upon arrival of the effective time of the system information.

The method according to any one of claims 1 to 8, wherein the specific bit in the user-specific signaling carries system information; or the user-specific signaling further includes indicating whether to carry system information. Bit.

The method according to any one of claims 1 to 8, wherein the user-specific signaling is further used to instruct the UE to stop detecting the system information in the broadcast signaling.

The method according to claim 12, further comprising the step of: the base station transmitting, to the UE, indication information indicating that the detection of the system information in the broadcast signaling is resumed.

14. A method of transmitting system information, comprising the steps of:

The UE receives user-specific signaling with system information;

The UE obtains system information from user-specific signaling.

The method according to claim 14, further comprising the steps of: the UE receiving broadcast signaling with system information; and the UE using the most recently received system information.

16. The method according to claim 14, wherein the specific bit in the user-specific signaling carries system information; and the step of the UE obtaining the system information from the user-specific signaling comprises: the UE-specific signal from the user Specific bits in the system to obtain system information; or

The user-specific signaling further includes a bit for indicating whether to carry the system information. The step of the UE obtaining the system information from the user-specific signaling includes: the UE identifying the information table carried by the bit for indicating whether to carry the system information. When the system information is displayed, the system information is obtained from the user-specific signaling.

The method according to claim 14, wherein after the UE receives the user-specific signaling with the system information, the method further includes the step of: stopping, by the UE, the detection of the system information in the broadcast signaling.

The method according to claim 17, wherein the user-specific signaling further includes an effective time of the system information; and the step of: the UE applies the obtained system information when the system information is valid.

The method according to claim 17, wherein the method further comprises the step of: recovering the detection of system information in the broadcast signaling when the time when the detection of the system information in the broadcast signaling is resumed is reached. Or the method further includes the steps of: the UE receiving the user-specific signaling with the recovery detection indication information, where the recovery detection indication information is used to indicate that the UE resumes detecting the system information in the broadcast signaling; or

The method further includes the step of: when the UE determines that the measurement information is not lower than a preset threshold, recovering detection of system information in the broadcast signaling.

The method according to claim 14, further comprising the step of: the UE reporting whether to support the information of the interference suppression mechanism when accessing the network.

A base station, comprising:

The base station according to claim 21, wherein, for a UE that satisfies at least one of the following conditions, the control module determines that the UE is a UE that is in a coverage hole; the conditions include:

For the UE that completes the handover, switch to forced handover;

The CQI reported by the UE is lower than the preset CQI threshold;

The RSRQ of the local area reported by the UE is lower than the preset RSRQ threshold.

The RSRP of the local area reported by the UE is lower than the preset RSRP threshold.

The base station according to claim 22, wherein the control module obtains the handover information through the X2 interface, and determines that the handover information indicates a forced handover, and determines that the handover is a forced handover.

24. The base station according to claim 23, wherein the handover information is carried in a handover request.

The base station according to claim 21, wherein the control module is further configured to determine whether the user-specific signaling can be reliably transmitted at present;

If the user-specific signaling can be reliably transmitted, the interface module sends user-specific signaling with system information to the UE in the coverage hole.

The base station according to claim 25, wherein the control module determines that the user-specific signaling can be reliably transmitted when one of the following conditions is met; the conditions include:

The correct response ACK or the error response of the UE for the physical downlink shared channel PDSCH is calculated by the control module to meet the preset statistical threshold;

The UE supports the interference suppression mechanism on the user side.

The base station according to claim 26, wherein, when the UE accesses the network, the control module obtains information reported by the UE for indicating whether the interference suppression mechanism is supported, and determines that the information indicates that the interference suppression mechanism is supported. When it is determined, the UE supports the interference suppression mechanism on the user side.

The base station according to claim 21, wherein the system information includes at least one of the following information: downlink bandwidth, PHICH configuration information, system frame number SFN, information related to cell access, and cell selection related Parameters, maximum transmit power, frequency band information, scheduling information of system information, time division duplex TDD configuration parameters, SI window length, SystemInfofoTag, access barring information, radio resource configuration information, terminal timer, and some constant information, frequency information, multimedia Broadcast multicast single-frequency network MBSFN subframe configuration information, synchronization timer information, cell reselection common parameters, cell reselection parameters of service frequency, related parameters of co-frequency cell reselection, co-frequency cell information, co-frequency Blacklist cell information, physical cell identity of the CSG cell and its range, inter-frequency carrier information, related information for cell reselection to the UTRA system, related information for cell reselection to the GERAN system, for use in the CDMA2000 system cell Re-selection of relevant information, only carrying the home base station Home Node B The identification information, carrying band for the primary notification of ETWS warning carrying ETWS warning for notification of the auxiliary.

The base station according to any one of claims 21 to 28, wherein the user-specific signaling further includes an effective time of the system information.

The base station according to claim 29, wherein the interface module is further configured to send broadcast signaling with system information when the system information is valid.

The base station according to any one of claims 21 to 28, wherein the specific bit in the user-specific signaling carries system information; or the user-specific signaling further includes indicating whether to carry system information. Bit.

The base station according to any one of claims 21 to 28, wherein the user-specific signaling is further used to instruct the UE to stop detecting the system information in the broadcast signaling.

The base station according to claim 32, wherein the interface module is further configured to send, to the UE, indication information indicating that the detection of the system information in the broadcast signaling is resumed.

34. A user equipment, comprising:

35. The user equipment according to claim 34, wherein the interface module is further configured to receive a system letter Broadcast signaling; The control module is also used to retrieve the most recently received system information.

36. The user equipment according to claim 34, wherein the specific bit in the user-specific signaling carries system information; and the control module obtains system information from a specific bit in the user-specific signaling; or

The user-specific signaling further includes a bit for indicating whether to carry system information; and the control module identifies that the information carried by the bit for indicating whether to carry the system information indicates that the system information is obtained, and the system is obtained from the user-specific signaling. information.

37. The user equipment according to claim 34, wherein the interface module stops detecting the system information in the broadcast signaling after receiving the user-specific signaling with the system information.

38. The user equipment according to claim 37, wherein the user-specific signaling further includes an effective time of the system information; and the control module is further configured to apply the obtained system information when the system information is valid.

The user equipment according to claim 38, wherein the control module resumes detecting the system information in the broadcast signaling when the time when the detection of the system information in the broadcast signaling is resumed is reached; or

The interface module is further configured to receive user-specific signaling with recovery detection indication information, where the recovery detection indication information is used to indicate that the UE resumes detection of system information in the broadcast signaling; or

The control module is further configured to resume detecting the system information in the broadcast signaling when the measurement information is not lower than a preset threshold.

The user equipment of claim 34, wherein the interface module is further configured to report information indicating whether the interference suppression mechanism is supported when accessing the network.