WO2011097807A1 - 检测和处理无线链路失败的方法和装置 - Google Patents
检测和处理无线链路失败的方法和装置 Download PDFInfo
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- WO2011097807A1 WO2011097807A1 PCT/CN2010/070649 CN2010070649W WO2011097807A1 WO 2011097807 A1 WO2011097807 A1 WO 2011097807A1 CN 2010070649 W CN2010070649 W CN 2010070649W WO 2011097807 A1 WO2011097807 A1 WO 2011097807A1
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- WIPO (PCT)
- Prior art keywords
- user terminal
- component carrier
- downlink component
- radio link
- downlink
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
- H04W24/04—Arrangements for maintaining operational condition
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/0001—Arrangements for dividing the transmission path
- H04L5/0003—Two-dimensional division
- H04L5/0005—Time-frequency
- H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A) or DMT
- H04L5/001—Time-frequency the frequencies being orthogonal, e.g. OFDM(A) or DMT the frequencies being arranged in component carriers
Definitions
- the present invention relates to wireless communication, as it relates to downlink component carrier radio link failure detection and processing in a wireless communication network. Background technique
- a User Equipment In a Long Term Evolution (LTE) wireless communication system, a User Equipment (UE) is configured with only one component carrier resource because there is only one component carrier.
- LTE Long Term Evolution
- UE User Equipment
- LTE-Advanced wireless communication systems carrier aggregation is used to increase system capacity.
- LTE-Advanced there may be multiple component carriers that are continuously or discontinuously distributed, and the total system bandwidth can reach 100M.
- a user terminal may be configured with multiple component carriers, and how to handle the downlink radio link failure becomes an urgent problem to be solved.
- a method for detecting a downlink radio link failure in a user terminal of a wireless communication network comprising the steps of: receiving a configuration message from a base station, the configuration message being used for Configuring the user terminal to detect a radio link failure on at least one downlink component carrier; determining whether a radio link eventually fails on each configured downlink component carrier; if detected on each configured downlink component carrier The radio link eventually fails, and timing begins; if the radio link recovery is not detected on any of the configured downlink component carriers within the first predetermined length of time, then the downlink radio link fails.
- a processing method for a radio link failure in a user terminal in a base station of a wireless communication network comprising: transmitting a configuration message to the user terminal, the configuration message being used for configuration
- the user terminal is in at least one downlink Detecting a radio link failure; determining whether the user terminal fails to occur on the at least one downlink component carrier of the configured at least one downlink component carrier; if the user terminal is configured in the Transmitting, by the user terminal, a new at least one downlink component carrier when a radio link finally fails on at least one downlink component carrier of the at least one downlink component carrier; sending a resource allocation notification message to the user terminal, the resource allocation The message is used to notify the user terminal of the new at least one downlink component carrier allocated thereto, and instruct the user terminal to detect a radio link failure on the at least one new component carrier.
- a detecting apparatus for detecting a downlink radio link failure in a user terminal of a wireless communication network, comprising: a first receiving apparatus, configured to receive a configuration message from a base station, The configuration message is configured to configure the user terminal to detect the radio link failure on the at least one downlink component carrier; the first determining means is configured to determine whether the radio link finally fails on each configured downlink component carrier; a timing device, configured to start timing if a wireless link finally fails to be detected on each configured downlink component carrier; and second determining means, if not configured in any of the first predetermined time lengths The radio link recovery is detected on the downlink component carrier, and the downlink radio link failure is determined.
- a processing apparatus for a radio link failure in a user terminal in a base station of a wireless communication network includes: a sending apparatus, configured to send a configuration message to the user terminal, where The configuration message is configured to configure the user terminal to detect the radio link failure on the at least one downlink component carrier, and the fourth determining means is configured to determine whether the user terminal is at least one downlink component in the configured at least one downlink component carrier A radio link finally fails on the carrier; the allocating means is configured to: if the user terminal finally fails to occur on the at least one downlink component carrier of the configured at least one downlink component carrier, The terminal allocates a new at least one downlink component carrier; the sending device is further configured to send a resource allocation notification message to the user terminal, where the resource allocation message is used to notify the user terminal of the new at least one downlink component allocated thereto a carrier, and indicating the at least one new component of the user terminal Radio link failure is detected on the wave.
- the method and apparatus of the present invention provide an effective technical solution for detecting a failure of a downlink radio link for a multi-carrier wireless communication system.
- the technical solution of the present invention provides more time to wait for link recovery, reduces the number of re-establishment connections, and avoids interruption of communication.
- the power and processing resources of the user terminal are effectively saved because the base station promptly causes the user terminal to turn off the detection on the downlink component carriers that have detected the final failure of the wireless link.
- FIG. 1 is a diagram showing an application scenario of a wireless communication system 100 in accordance with an embodiment of the present invention
- FIG. 2 is a flow chart of a method for detecting a downlink radio link failure in a user terminal of a wireless communication network, in accordance with an embodiment of the present invention
- FIG. 3 is a flowchart of a process for failing a radio link in a user terminal in a base station of a wireless communication network according to an embodiment of the present invention
- FIG. 4 is a structural diagram of a detecting apparatus for detecting a downlink radio link failure in a user terminal of a wireless communication network according to an embodiment of the present invention
- FIG. 5 is a structural block diagram of a processing apparatus for processing a radio link failure in a user terminal in a base station of a wireless communication network according to an embodiment of the present invention
- FIG. 1 is a diagram showing an application scenario of a wireless communication system 100 according to an embodiment of the present invention.
- a base station 110 and a user terminal 120 are included.
- base station 110 will typically have more User terminal, for simplicity in Figure 1, only user terminal 120 is shown.
- the wireless communication system 100 has five downlink component carriers CC1.
- CC2, CC3, CC4, and CC5 are taken as an example to describe various embodiments of the present invention in detail.
- FIG. 2 is a flow chart showing a method for detecting a downlink radio link failure in a user terminal of a wireless communication network according to an embodiment of the present invention.
- the user terminal 120 in FIG. 1 detects the downlink. The process of wireless link failure is described in detail.
- the user terminal 120 receives a configuration message from the base station 110, which is used to configure the user terminal 120 to detect a radio link failure on at least one downlink component carrier.
- base station 110 configures user terminal 120 for component carriers CC1, CC2, and CC3. The detection of the wireless link failed.
- step S202 the user terminal 120 determines whether a radio link final failure is detected on each of the configured downlink component carriers.
- the meaning of a downlink component carrier radio link eventually failing is that after detecting a temporary failure of the radio link on the component carrier within a predetermined length of time, timing begins, for a second predetermined time period. If the radio link recovery is not detected, the link is considered to have failed; if the radio link recovery is detected, the link is considered to have not failed.
- a radio link failure within a second predetermined length of time is referred to as a radio link temporary failure.
- the user terminal 120 detects a temporary failure and a final failure of the wireless link on one component carrier, which is exemplified below.
- the user terminal 120 detects, on a configured downlink component carrier, a first predetermined number of radio reference signals whose intensity values are lower than a predetermined threshold, for example, as defined in LTE, for a third predetermined length of time.
- the out-sync signal determines that a radio link temporary failure is detected on the configured downlink component carrier. Starting from a temporary failure of the wireless link, if a second predetermined number of wireless reference signals whose intensity values are above a predetermined threshold are not detected on the component carrier for a second predetermined length of time, As determined by the in-sync signal in LTE, it is determined that a final failure of the radio link is detected on the configured downlink component carrier.
- the criteria for determining whether the different component carriers temporarily fail the wireless link may be the same or different. For example, if, for a third predetermined length of time, a signal indicating that M1 intensity values are below a predetermined threshold is detected on the component carrier CC1, it is considered that the radio link temporarily fails on the component carrier CC1; if at the third predetermined time length If the signal of the N1 intensity values below the predetermined threshold is detected on the component carrier CC2, it is considered that the radio link temporarily fails on the component carrier CC2, and N1 is not equal to M1.
- the values of the predetermined thresholds may be the same or different.
- the user terminal 120 detects on the component carrier CC1 that the M2 strength values are above a predetermined threshold, such as the in-sync signal defined in LTE, It is considered that the radio link recovery is detected on the component carrier CC1, and the state in which the radio link temporarily fails on the component carrier CC1 is removed. If, within a second predetermined length of time, the user terminal 120 detects N2 signals having a strength value above a predetermined threshold on the component carrier CC2, such as an in-sync signal defined in LTE, it is considered that it is detected on the component carrier CC2. When the radio link is restored, the state in which the radio link temporarily fails on the component carrier CC2 is removed. N2 is not equal to M2.
- a predetermined threshold such as the in-sync signal defined in LTE
- the user terminal 120 determines, on a configured downlink component carrier, for a fourth predetermined time length, that the channel shield amount on CC3 is always lower than a predetermined quality, or the channel quality is lower than a predetermined quality. Upon reaching a first predetermined number of times, it is determined that a temporary failure of the wireless link is detected on the configured downlink component carrier.
- Counting from the temporary failure of the wireless link if the user terminal 120 detects that the channel quality on the component carrier is higher than the predetermined quality for a second predetermined number of times within the second predetermined time length, determining the component carrier When the radio link recovery is detected, the state in which the radio link temporarily fails on the component carrier is removed.
- predetermined quality standards may be the same or different for different component carriers.
- the user terminal 120 wirelessly determines a configured downlink component carrier. After the link finally fails, the radio link recovery may continue to be detected on the downlink component carrier where the radio link eventually fails. If the radio link recovery is detected, the state in which the component carrier radio link eventually fails is removed. In one embodiment, if the base station 110 informs the user terminal 120 not to continue detecting radio link recovery on the downlink component carrier where the radio link eventually fails, the user terminal 120 turns off detection, which will be described in detail below.
- step S203 if the radio link finally fails on each of the configured downlink component carriers, timing is started. For example, user terminal 120 can initiate a timer. This provides another opportunity for wireless link recovery.
- step S204 if the radio link recovery is not detected on any of the configured downlink component carriers within the first predetermined length of time, then the downlink radio link failure is determined.
- the meaning of the downlink radio link failure means that all configured downlink component carrier radio links at the user terminal 120 eventually fail.
- the user terminal 120 if within a first predetermined length of time, the user terminal 120 does not detect a third predetermined number of radio reference signals having a strength value above a predetermined threshold on any of the configured downlink component carriers, such as in LTE.
- the defined in-sync signal determines that the radio link recovery is not detected on any of the configured downlink component carriers, and then determines that the downlink radio link has failed.
- the criteria for determining whether the different component carriers are wireless link recovery may be the same or different. For example, if a signal of X intensity values higher than a predetermined threshold is detected on the component carrier CC1 within the first predetermined time length, it is considered that the radio link recovery is detected on the component carrier CC1; if at the first predetermined time length If the signal of the Y strength values above the predetermined threshold is detected on the component carrier CC2, it is considered that the radio link recovery is detected on the component carrier CC2, and X is not equal to Y.
- the values of the predetermined thresholds may be the same or different.
- the user terminal 120 may re-establish a wireless connection with base station 110, possibly establishing a wireless connection with other base stations (not shown in Figure 1).
- the user terminal 120 after detecting that the radio link on each downlink component carrier finally fails, notifies the upper layer, such as the RRC layer, that the RRC layer has a radio link on all configured downlink component carriers. After the failure, that is, after the downlink wireless link finally fails, the wireless connection is re-established.
- the upper layer such as the RRC layer
- the above describes in detail how the user terminal 120 determines that the entire downlink radio link has failed.
- the base station 110 may also notify the base station 110 of the wireless configuration on the at least one component carrier of the at least one downlink component carrier. The link eventually failed.
- user terminal 120 may also only notify the base station 110 of the final failure of the radio link of a portion of the component carriers. For example, if the user terminal 120 detects a final failure of the radio link on the component carriers CC1 and CC2, the user terminal 120 notifies the base station 110 of the fact that the radio link eventually fails on the component carriers CC1 and CC2. The user terminal 120 may also notify the base station 110 of only the fact that the radio link eventually fails to be detected on the component carrier CC1, or only the fact that the detection of the radio link eventually fails on the component carrier CC2.
- the base station 110 after receiving the notification from the user terminal 120, the base station 110 sends a notification message to the user terminal 120 to notify the user terminal 120 to turn off detection on the at least one configured downlink component carrier that is ultimately failed, that is, to turn off the wireless. Link recovery and radio link failure detection. After receiving the notification message, the user terminal 120 turns off the detection on the component carrier notified by the base station 110. This has the advantage of saving power and processing resources of the user terminal 120. In one embodiment, base station 110 may also only notify user terminal 120 to turn off detection on a portion of the component carriers in the component carriers for which the final radio link failure of the base station 110 is notified.
- the user terminal 120 can also detect radio link recovery on the downlink component carrier where each radio link eventually fails. If the radio link recovery is detected on a certain downlink component carrier, the base station 110 is notified.
- the base station 110 notifies the user terminal 120 to turn off the detection on the component carriers CC1 and CC2, that is, to let the user terminal 120 discards component carriers CC1 and CC2.
- the base station 110 may also only notify the user terminal 120 to turn off detection on the component carrier CC1, or only notify the user terminal 120 to turn off detection on the component carrier CC2.
- the base station 110 may further allocate at least one new component carrier to the user terminal 120, and send a resource allocation notification message to the user terminal 120, where The resource allocation notification message is used to notify the user terminal 120 of the at least one new component carrier allocated by the base station, and instructs the user terminal 120 to detect the radio link failure on the at least one new component carrier.
- the user terminal is described below, from the perspective of the base station, in combination with FIG. 1 and FIG. 3, in the multi-carrier wireless communication system, the base station is used for wireless in the user terminal.
- the processing flow of the link failure is described in detail.
- step S301 the base station 110 sends a configuration message to the user terminal 120, where the configuration message is used to configure the user terminal 120 to detect a radio link failure on at least one downlink component carrier.
- At least one component carrier of the configuration is used for transmission of downlink control signaling and/or transmission of downlink data.
- step S302 the base station 110 determines whether the user terminal 120 has failed to occur on the radio link on at least one of the at least one downlink component carrier being configured.
- the base station 110 determines that the user terminal 120 eventually fails on the radio link on one component carrier, as exemplified below.
- base station 110 receives A notification from the user terminal 120 indicating that at least one of the at least one downlink component carrier to which it is configured has a radio link failure. Then, in step S302, the base station 110 learns, according to the notification, on which component carriers the user terminal 120 finally fails the radio link link.
- base station 110 receives channel quality indication information from user terminal 120 on at least one of the configured at least one downlink component carrier. Then, in step S302, the base station 110 determines, according to channel quality indication information on at least one component carrier of at least one downlink component carrier configured by the user terminal 120, whether the user terminal 120 is at least one of configured at least one downlink component carrier. A radio link failure has occurred on the component carrier.
- the base station 110 determines that the radio link temporary is detected on the downlink component carrier. Failure, and then timing is started. If the channel quality on the downlink component carrier is still lower than the predetermined quality or the number of times higher than the predetermined quality is lower than the second predetermined number of times within the second predetermined time length, the base station 110 determines the user terminal 120. The radio link eventually fails on this component carrier.
- step S303 if the base station 110 determines that the user terminal 120 finally fails to appear on the at least one downlink component carrier of the configured at least one downlink component carrier, the user terminal 120 is allocated a new at least one downlink component. Carrier.
- step S304 the base station 110 sends a resource allocation notification message to the user terminal 120, where the resource allocation message is used to notify the user terminal 120 of the new at least one downlink component carrier allocated by the base station.
- the base station 110 may also notify the user terminal 120 to detect a radio link failure on at least one new component carrier.
- the base station 110 can assign the component carriers CC4 and CC5 to the user terminal 120 and instruct the user terminal 120 to detect the wireless chain on the component carriers CC4 and CC5.
- the user terminal 120 detects the radio link failure on the component carriers CC3, CC4, and CC5.
- the user terminal 120 finally fails on the component carriers CC1, CC2, and CC3, it means that the downlink between the base station 110 and the user terminal 120 all fails, and the control signaling or data of the base station 110 cannot reach the user terminal 120. That is, the base station 110 loses control of the user terminal 120, and at this time, it can only be solved by the user terminal 120 reconnecting itself.
- the base station 110 may send a notification message to the user.
- the terminal 120 is configured to notify the user terminal 120 to turn off detection on at least one configured downlink component carrier that ultimately fails.
- base station 110 may also only notify user terminal 120 to turn off detection on some of the component carriers in the component carriers that failed the final radio link.
- the detecting device 400 includes a first receiving device 401, a first determining device 402, a first timing device 403, and a second determining device 404.
- the detecting device 400 includes a first receiving device 401, a first determining device 402, a first timing device 403, and a second determining device 404.
- some sub-devices are not shown in Figure 4.
- the first receiving device 401 receives a configuration message from the base station 110, which is used to configure the user terminal 120 to detect a radio link failure on at least one downlink component carrier.
- base station 1 10 configures user terminal 120 for component carriers CC1, CC2, and The wireless link failed to detect on CC3.
- the first determining means 402 determines whether a final failure of the radio link is detected on each of the configured downlink component carriers.
- the detecting device 400 further includes a temporary failure detecting device, a second timing device, and a third determining device, configured to determine a wireless chain on one or more downlink component carriers. The road eventually failed.
- the final failure of a downlink component carrier radio link means that, after a temporary failure detecting device detects a temporary failure of the radio link on the component carrier within a predetermined length of time, the second timing device Starting timing, if the wireless link recovery is not detected within the second predetermined time length, the third determining device determines that the link eventually fails; if the wireless link recovery is detected, the third determining device determines that the link eventually No failure.
- a radio link failure within a second predetermined length of time is referred to as a radio link temporary failure.
- the temporary failure detecting means detects that the wireless link temporarily fails on one component carrier, which will be exemplified below.
- the temporary failure detecting means detects, on a configured downlink component carrier, a first predetermined number of radio reference signals whose intensity values are lower than a predetermined threshold, for example, as defined in LTE, for a third predetermined time length.
- the out-sync signal determines that a radio link temporary failure is detected on the configured downlink component carrier.
- the second timing device starts timing from the temporary failure of the wireless link, and if a second predetermined number of wireless reference signals whose intensity values are higher than a predetermined threshold are detected on the component carrier for a second predetermined time length, such as in LTE
- the third determining means determines that the radio link eventually fails on the configured downlink component carrier.
- the criteria for determining whether the different component carriers temporarily fail the wireless link may be the same or different. For example, if, during the third predetermined time length, the M1 intensity values are lower than the predetermined threshold value on the component carrier CC1, it is considered that the wireless link temporary failure is detected on the component carrier CC1; if at the third predetermined time Within the length, when the component carrier CC2 detects N1 signals whose intensity value is lower than a predetermined threshold, it is considered that the radio link temporarily fails on the component carrier CC2, and N1 is not equal to M1.
- the values of the predetermined thresholds may be the same or different.
- the second timing device starts timing from a temporary failure of the wireless link, and if a signal of the M2 intensity values higher than a predetermined threshold is detected on the component carrier CC1 for a second predetermined time length, such as in-sync defined in LTE Signal, then the third determining device considers the component When the radio link recovery is detected on the carrier CC1, the state in which the radio link temporarily fails on the component carrier CC1 is removed. If a signal of N2 intensity values above a predetermined threshold is detected on the component carrier CC2 for a second predetermined length of time, such as an in-sync signal defined in LTE, the third determining means determines that the component carrier CC2 is detected. When the radio link is restored, the state in which the radio link temporarily fails on the component carrier CC2 is removed. N2 is not equal to M2.
- the temporary failure detecting means determines that the channel quality of a configured downlink component carrier, such as CC3, is always lower than a predetermined quality, or the channel quality is lower than a predetermined quality, within a fourth predetermined time length. A first predetermined number of times is reached to determine that a radio link temporary failure has been detected on the configured downlink component carrier.
- the second timing device starts timing from a temporary failure of the wireless link, and if the number of times the channel quality on the component carrier is higher than the predetermined quality is detected to be higher than the second predetermined number of times within the second predetermined time length, the third determining device Determining that radio link recovery is detected on the component carrier, the state in which the radio link temporarily fails on the component carrier is removed.
- predetermined quality standards may be the same or different for different component carriers.
- the third determining device may continue to detect the radio link recovery on the downlink component carrier that the radio link eventually fails, if the wireless device is detected. When the link is restored, the state in which the component carrier radio link eventually fails is removed. In one embodiment, if the base station 110 notifies the detecting device 400 that the wireless link recovery is not to be detected on the downlink component carrier where the wireless link eventually fails, the detecting device 400 turns off the detection, which will be described in detail below.
- the first timing device 403 starts timing.
- the first timing device 403 can be a timer.
- the second determining means 404 determines that the downlink radio link has failed.
- the meaning of the downlink radio link failure means that all configured downlink component carrier radio links at the user terminal 120 eventually fail.
- a third predetermined number of radio reference signals having an intensity value above a predetermined threshold are detected on any of the configured downlink component carriers within a first predetermined length of time, such as defined in LTE The -sync signal, then the second determining means 404 determines that the radio link recovery is not detected on any of the configured downlink component carriers, and then determines that the downlink radio link has failed.
- the criteria for determining whether the different component carriers are wireless link recovery may be the same or different. For example, if a signal of X intensity values higher than a predetermined threshold is detected on the component carrier CC1 within the first predetermined time length, it is considered that the radio link recovery is detected on the component carrier CC1; if at the first predetermined time length If the signal of the Y strength values above the predetermined threshold is detected on the component carrier CC2, it is considered that the radio link recovery is detected on the component carrier CC2, and X is not equal to Y. In addition, for different component carriers, the value of the predetermined threshold may be the same or different.
- the second determining means 404 determines that there is no A radio link recovery is detected on any of the configured downlink component carriers, and a downlink radio link failure is determined.
- the predetermined quality criteria may be the same or different for different component carriers.
- the user terminal 120 After the second determining means 404 determines that the downlink radio link has failed, the user terminal 120 will no longer detect the radio link recovery on any of the configured downlink component carriers, but reestablish the radio connection.
- User terminal 120 may re-establish a wireless connection with base station 110, possibly establishing a wireless connection with other base stations (not shown in Figure 1).
- the user terminal 120 after detecting that the radio link on each downlink component carrier finally fails, the user terminal 120 notifies the upper layer, such as the RRC layer, that the RRC layer has a radio link on all configured downlink component carriers. After the failure, that is, after the downlink wireless link finally fails, the wireless connection is re-established.
- the above describes in detail how the user terminal 120 determines that the entire downlink radio link has failed.
- the detecting device 400 may further include a first notification device. And configured to notify the base station 110 that the wireless link on the at least one component carrier of the at least one downlink component carrier is configured to fail.
- the first notification device may also notify the base station 110 of only the final failure of the radio link of the partial component carrier. For example, if the third determining means detects a final failure of the radio link on the component carriers CC1 and CC2, the first notifying means notifies the base station 110 of the fact that the radio link eventually fails on the component carriers CC1 and CC2.
- the first notifying means may also notify only the base station 110 of the fact that the radio link is finally failed to be detected on the component carrier CC1, or only the fact that the radio link eventually fails to be detected on the component carrier CC2.
- the base station 110 after receiving the notification from the user terminal 120, the base station 110 sends a notification message to the user terminal 120 to notify the user terminal 120 to turn off detection on the at least one configured downlink component carrier that is ultimately failed, that is, to turn off the wireless. Link recovery and radio link failure detection.
- the first receiving device 401 After receiving the notification message, the first receiving device 401 turns off the detection on the component carrier notified by the base station 110. This has the advantage of saving power and processing resources of the user terminal 120.
- base station 110 may also only notify user terminal 120 to turn off detection on a portion of the component carriers of the component carriers for which the final radio link failure of the base station 110 is notified.
- the detecting device 400 can also detect the radio link recovery on the downlink component carrier where each radio link eventually fails.
- the base station 110 is notified if a radio link recovery is detected on a certain downlink component carrier.
- the base station 110 notifies the user terminal 120 to turn off the detection on the component carriers CC1 and CC2, that is, to let the user Terminal 120 relinquishes component carriers CC1 and CC2.
- the base station 110 may also only notify the user terminal 120 to turn off detection on the component carrier CC1, or only notify the user terminal 120 to turn off detection on the component carrier CC2.
- the base station 110 may further allocate at least one new component carrier to the user terminal 120, and send a resource allocation notification message to the user terminal 120, where Resource allocation notification message is used Notifying the user terminal 120 of the at least one new component carrier assigned by the base station, and instructing the user terminal 120 to detect a radio link failure on the at least one new component carrier.
- FIG. 5 is a block diagram showing the structure of a processing device 500 for processing a radio link failure in a user terminal in a base station of a wireless communication network in accordance with an embodiment of the present invention.
- the processing device 500 includes a transmitting device 501, a fourth determining device 502, and a distributing device 503.
- the basic process in the multi-carrier wireless communication system will be described in detail below with reference to FIG.
- the transmitting device 501 sends a configuration message to the user terminal 120, which is configured to configure the user terminal 120 to detect a radio link failure on at least one downlink component carrier.
- At least one component carrier of the configuration is used for transmission of downlink control signaling and/or transmission of downlink data.
- the fourth determining means 502 determines whether the user terminal 120 has finally failed to occur on the radio link on at least one of the at least one downlink component carrier being configured.
- the fourth determining means 502 determines that the user terminal 120 has finally failed the radio link on one component carrier, as exemplified below.
- the processing device 500 further includes a second receiving device (not shown in FIG. 5) for receiving the presence of at least one of the at least one downlink component carrier from the user terminal 120 indicating that it is configured. Notification of a radio link failure. Then, based on the notification, the fourth determining means 502 knows on which component carriers the user terminal 120 the radio link link eventually fails.
- the second receiving device receives channel quality indication information from the user terminal 120 on at least one of the configured at least one downlink component carrier. Then, the fourth determining means 502 determines, according to the channel quality indication information on the at least one component carrier of the at least one downlink component carrier configured by the user terminal 120. Whether the subscriber terminal 120 has a radio link failure on at least one of the at least one downlink component carrier configured.
- the fourth determining means 502 determines that the wireless component is detected on the downlink component carrier. The link temporarily fails, and then starts timing. If the channel quality on the downlink component carrier is still lower than the predetermined quality or the number of times higher than the predetermined quality is lower than the second predetermined number of times within the second predetermined time length, the fourth determination is performed. Apparatus 502 determines that the user terminal 120 has failed the wireless link on the component carrier.
- the allocating means 503 allocates the new at least one downlink component carrier to the user terminal 120. .
- the transmitting device 501 sends a resource allocation notification message to the user terminal 120, which is used to notify the user terminal 120 of the new at least one downlink component carrier allocated by the base station.
- the transmitting device 501 may also send a notification to the user terminal 120 indicating that the user terminal 120 has detected a radio link failure on at least one new component carrier.
- the allocation device 503 can assign the component carriers CC4 and CC5 to the user terminal 120 and instruct the user terminal 120 to detect the wireless on the component carriers CC4 and CC5. The link failed.
- the user terminal 120 detects the radio link failure on the component carriers CC3, CC4, and CC5.
- the user terminal 120 If the user terminal 120 finally fails on the component carriers CC1, CC2, and CC3, it means that the downlink between the base station 110 and the user terminal 120 all fails, and the control signaling or data of the base station 110 cannot reach the user terminal 120. That is, the base station 110 loses control of the user terminal 120, and at this time, it can only be solved by the user terminal 120 reconnecting itself.
- the fourth determining means 502 determines that the user terminal 120 has the most wireless link on at least one of the configured at least one downlink component carrier.
- the transmitting device 501 sends a notification message to the user terminal 120, which is used to notify the user terminal 120 to turn off the detection on at least one of the configured downlink component carriers that ultimately failed.
- base station 110 may also only notify user terminal 120 to turn off detection on a portion of the component carriers in the component carriers that failed the final radio link.
- the present invention is applicable to a general multi-component carrier wireless communication system.
- the values of the respective predetermined time lengths, predetermined numbers, predetermined times, and predetermined thresholds herein may vary depending on the actual implementation of the actual system.
- the third predetermined length of time may be the same as the fourth predetermined length of time.
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Description
检测和処理无线链路失败的方法和装置
技术领域
本发明涉及用于无线通信, 由于涉及无线通信网络中下行分量载 波无线链路失败检 'J和处理。 背景技术
长期演进(Long Term Evolution, LTE )无线通信系统中, 由于只有 一个分量载波, 因此用户终端( User Equipment, UE )仅被配置一个分量 载波资源。 当基站与用户终端之间的通信不能被保证时, 下行无线链路 失败被确认, 由于只有一个分量载波, 因此用户终端要与原基站或新的 基站之间重新建立连接。 发明内容
在 LTE-Advanced无线通信系统中, 采用了载波聚合来增加系统容 量, 也即在 LTE-Advanced 中, 可存在连续或不连续分布的多个分量载 波, 系统总带宽可达到 100M。 一个用户终端可能被配置了多个分量载 波, 此时如何处理下行无线链路失败成为一个迫切需要解决的问题。
根据本发明的一个具体实施例 ,提供了一种在无线通信网络的用户 终端中用于检测下行无线链路失败的方法, 该方法包括以下步骤: 接 收来自基站的配置消息, 该配置消息用于配置所述用户终端在至少一 个下行分量载波检测无线链路失败; 确定是否在每个被配置的下行分 量载波上检测到了无线链路最终失败; 如果在每个被配置的下行分量 载波上检测到了无线链路最终失败, 则开始计时; 如果在第一预定时 间长度内, 没有在任何被配置的下行分量载波上检测无线链路恢复, 则确定下行链路无线链路失败。
根据本发明的另一个实施例,提供了一种在无线通信网络的基站 中用于用户终端中无线链路失败的处理方法, 包括: 发送配置消息至 所述用户终端, 该配置消息用于配置所述用户终端在至少一个下行分
量载波检测无线链路失败; 确定所述用户终端是否在所述被配置的至 少一个下行分量载波中至少一个下行分量载波上出现无线链路最终 失败; 如果所述用户终端在所述被配置的至少一个下行分量载波中至 少一个下行分量载波上出现了无线链路最终失败, 则为所述用户终端 分配新的至少一个下行分量载波; 发送一个资源分配通知消息至所述 用户终端, 该资源分配消息用于通知所述用户终端为其分配的新的至 少一个下行分量载波, 并指示所述用户终端在所述至少一个新的分量 载波上检测无线链路失败。
根据本发明的又一个实施例, 提供了一种在无线通信网络的用户 终端中用于检测下行无线链路失败的检测装置, 包括:第一接收装置, 用于接收来自基站的配置消息, 该配置消息用于配置所述用户终端在 至少一个下行分量载波检测无线链路失败; 第一确定装置, 用于确定 是否在每个被配置的下行分量载波上检测到了无线链路最终失败; 第 一计时装置, 用于如果在每个被配置的下行分量载波上检测到了无线 链路最终失败, 则开始计时; 第二确定装置, 用于如果在第一预定时 间长度内, 没有在任何被配置的下行分量载波上检测无线链路恢复, 则确定下行链路无线链路失败。
根据本发明的另一个实施例,提供了一种在无线通信网络的基站 中用于用户终端中无线链路失败的处理装置, 包括: 发送装置, 用于 发送配置消息至所述用户终端, 该配置消息用于配置所述用户终端在 至少一个下行分量载波检测无线链路失败; 第四确定装置, 用于确定 所述用户终端是否在所述被配置的至少一个下行分量载波中至少一 个下行分量载波上出现无线链路最终失败; 分配装置, 用于如果所述 用户终端在所述被配置的至少一个下行分量载波中至少一个下行分 量载波上出现了无线链路最终失败, 则为所述用户终端分配新的至少 一个下行分量载波; 所述发送装置还用于发送一个资源分配通知消息 至所述用户终端, 该资源分配消息用于通知所述用户终端为其分配的 新的至少一个下行分量载波, 并指示所述用户终端在所述至少一个新 的分量载波上检测无线链路失败。
通过本发明的方法和装置, 为多载波无线通信系统提供了一个有 效的检测下行无线链路失败的技术方案。 本发明的技术方案提供了更 多的时间等待链路的恢复, 减小重新建立连接的次数, 避免通信的中 断。 在一个实施例中, 由于基站及时让用户终端关闭在那些已经检测 到无线链路最终失败的下行分量载波上的检测, 有效地节省了用户终 端的功率和处理资源。
附图说明
通过阅读以下参照附图对非限制性实施例所作的详细描述, 本发 明的其它特征、 目的和优点将会变得更明显。
图 1为根据本发明的一个具体实施方式的无线通信系统 100的应 用场景图;
图 2为根据本发明的一个具体实施例的在无线通信网络的用户终 端中用于检测下行无线链路失败的方法流程图;
图 3为根据本发明的一个具体实施方式的在无线通信网络的基站 中用于对用户终端中无线链路失败的处理流程;
图 4为根据本发明的一个具体实施例的在无线通信网络的用户终 端中用于检测下行无线链路失败的检测装置的结构图;
图 5为根据本发明的一个具体实施方式的在无线通信网络的基站 中用于对用户终端中无线链路失败进行处理的处理装置的结构框 图;
其中, 相同或相似的附图标记表示相同或相似的步骤特征或装置 (模块)。 具体实施方式
以下结合附图对本发明的具体实施例进行详细的示例性描述。 图 1示出了根据本发明的一个具体实施方式的无线通信系统 100 的应用场景图, 在图 1所示的应用场景中, 包括基站 110和用户终端 120。 本领域的普通技术人员应能理解, 基站 110通常会辖有更多个
用户终端, 图 1 中为简明起见, 仅示出了用户终端 120。
不失一般性地, 无线通信系统 100具有 5个下行分量载波 CC1、
CC2、 CC3、 CC4和 CC5为例,对本发明的各个实施例进行详细说明。
图 2示出了根据本发明的一个具体实施例的在无线通信网络的用 户终端中用于检测下行无线链路失败的方法流程图, 以下结合图 2, 对图 1 中的用户终端 120检测下行无线链路失败的过程进行详细描 述。
首先, 在步骤 S201 中, 用户终端 120接收来自基站 110的配置 消息, 该配置消息用于配置用户终端 120在至少一个下行分量载波上 检测无线链路失败。 在一个实施例中, 如分量载波 CC1、 CC2和 CC3 分配给用户终端 120用于下行控制信令的传输和 /或下行数据的传输, 则基站 110配置用户终端 120在分量载波 CC1、 CC2和 CC3上检测 无线链路失败。
接着, 在步骤 S202中, 用户终端 120确定是否在每个被配置的 下行分量载波上检测到了无线链路最终失败。
在一个实施例中, 一个下行分量载波无线链路最终失败的含义是 指, 在一个预定时间长度内在该分量载波上检测到无线链路临时失败 后, 则开始计时, 在第二预定时间长度内, 如果没有检测到无线链路 恢复, 则认为该链路最终失败; 如果检测到无线链路恢复, 则认为该 链路最终没有失败。在第二预定时间长度内的无线链路失败称为无线 链路临时失败。
具体地, 用户终端 120在一个分量载波上检测到无线链路临时失 败和最终失败的情形有多种, 下文对此进行举例说明。
在一个实施例中, 用户终端 120在第三预定时间长度内, 在一个 被配置的下行分量载波上检测到了第一预定数目的强度值低于预定 阔值的无线参考信号, 例如 LTE中所定义的 out-sync信号, 则确定在 该被配置的下行分量载波上检测到了无线链路临时失败。 从无线链路 临时失败开始计时, 如果在第二预定时间长度内, 没有在该分量载波 上检测到了第二预定数目的强度值高于预定阈值的无线参考信号, 例
如 LTE中所定义的 in-sync信号, 则确定在该被配置的下行分量载波 上检测到了无线链路最终失败。
需要说明的是, 确定不同分量载波是否无线链路临时失败的标准 可以一样, 也可以不一样。 例如, 如果在第三预定时间长度内, 在分 量载波 CC1检测到了 Ml个强度值低于预定阈值的信号,则认为在分 量载波 CC1 上检测到了无线链路临时失败; 如果在第三预定时间长 度内, 在分量载波 CC2检测到了 N1个强度值低于预定阈值的信号, 则认为在分量载波 CC2 上检测到了无线链路临时失败, N1 不等于 Ml。 另外, 对于不同的分量载波, 预定阈值的取值也可能相同, 也 可能不同。
从无线链路临时失败开始计时, 如果在第二预定时间长度内, 用 户终端 120在分量载波 CC1上检测到了 M2个强度值高于预定阈值的 信号, 例如 LTE中所定义的 in-sync信号, 则认为在分量载波 CC1上 检测到了无线链路恢复, 则移去分量载波 CC1 上无线链路临时失败 的状态。 如果在第二预定时间长度内, 用户终端 120在分量载波 CC2 上检测到了 N2个强度值高于预定阈值的信号, 例如 LTE中所定义的 in-sync信号, 则认为在分量载波 CC2上检测到了无线链路恢复, 则 移去分量载波 CC2上无线链路临时失败的状态。 N2不等于 M2。
在另一个实施例中, 用户终端 120在第四预定时间长度内, 确定 一个配置的下行分量载波上, 如 CC3 上, 的信道盾量一直低于预定 质量, 或者信道质量低于预定质量的次数达到一个第一预定次数, 则 确定在该被配置的下行分量载波上检测到了无线链路临时失败。
从无线链路临时失败开始计时, 如果在第二预定时间长度内, 用 户终端 120检测到在该分量载波上的信道质量高于预定质量的次数高 于第二预定次数, 则确定在该分量载波上检测到了无线链路恢复, 则 移去该分量载波上无线链路临时失败的状态。
需要说明的是, 对于不同的分量载波, 预定质量标准可能相同, 也可能不同。
可选地, 用户终端 120在确定一个被配置的下行分量载波上无线
链路最终失败后, 还可以在该无线链路最终失败的下行分量载波上继 续检测无线链路恢复, 如果检测到无线链路恢复, 则移去该分量载波 无线链路最终失败的状态。 在一个实施例中, 如果基站 110通知用户 终端 120不在该无线链路最终失败的下行分量载波上继续检测无线链 路恢复, 则用户终端 120关闭检测, 下文将会对此进行详细描述。
接着, 在步骤 S203 中, 如果在每个被配置的下行分量载波上检 测到了无线链路最终失败, 则开始计时。 例如, 用户终端 120可以启 动一个定时器。 这为无线链路恢复又提供了一次机会。
最后, 在步骤 S204 中, 如果在第一预定时间长度内, 没有在任 何被配置的下行分量载波上检测无线链路恢复, 则确定下行链路无线 链路失败。 下行链路无线链路失败的含义是指在用户终端 120所有被 配置的下行分量载波无线链路最终失败。
在一个实施例中, 如果在第一预定时间长度内, 用户终端 120没 有在任一个被配置的下行分量载波上检测到了第三预定数目的强度 值高于预定阈值的无线参考信号,例如 LTE中所定义的 in-sync信号, 则确定没有在任何被配置的下行分量载波上检测无线链路恢复, 则确 定下行链路无线链路失败。
需要说明的是, 确定不同分量载波是否无线链路恢复的标准可以 一样, 也可以不一样。 例如, 如果在第一预定时间长度内, 在分量载 波 CC1检测到了 X个强度值高于预定阔值的信号, 则认为在分量载 波 CC1 上检测到了无线链路恢复; 如果在第一预定时间长度内, 在 分量载波 CC2检测到了 Y个强度值高于预定阈值的信号, 则认为在 分量载波 CC2上检测到了无线链路恢复, X不等于 Y。 另外, 对于不 同的分量载波, 预定阈值的取值也可能相同, 也可能不同。
在另一个实施例中, 如果在第一预定时间长度内, 用户终端 120 没有在任一个被配置的下行分量载波上检测到了第三预定次数或以 上的信道质量高于预定质量, 则确定没有在任何被配置的下行分量载 波上检测无线链路恢复, 则确定下行链路无线链路失败。 对于不同的 分量载波, 预定质量标准可能相同, 也可能不同。
在用户终端 120确定下行链路无线链路失败后, 用户终端 120不 会再在任何被配置的下行分量载波上检测无线链路恢复了, 而是重新 建立无线连接。 用户终端 120可能与基站 110重新建立无线连接, 有 可能与其它基站(未在图 1中示出)建立无线连接。在一个实施例中, 用户终端 120在检测到每个下行分量载波上的无线链路最终失败后, 通知上层, 如 RRC层, RRC层在所有的被配置的下行分量载波上出 现无线链路最终失败后, 也即下行链路的无线链路最终失败后, 重新 建立无线连接。
以上对用户终端 120如何确定整个下行无线链路失败的情形进行 了详细说明。
可选地, 在用户终端 120在检测到一个或多个被配置的分量载波 上的无线链路最终失败时, 还可以通知基站 110被配置的至少一个下 行分量载波中至少一个分量载波上的无线链路最终失败。 在一个实施 例中, 用户终端 120还可以仅将部分分量载波的无线链路最终失败通 知给基站 110。 例如, 如用户终端 120在分量载波 CC1和 CC2上检 测到了无线链路最终失败,则用户终端 120将在分量载波 CC1和 CC2 上检测到无线链路最终失败的事实通知给基站 110。 用户终端 120也 可仅将在分量载波 CC1 上检测无线链路最终失败的事实通知给基站 110, 或者是仅将分量载波 CC2上检测无线链路最终失败的事实通知 给基站 110。
可选地, 基站 110在接收到用户终端 120的通知后, 发送一个通 知消息给用户终端 120 , 以通知用户终端 120在最终失败的至少一个 被配置的下行分量载波上关闭检测, 也即关闭无线链路恢复和无线链 路失败检测。 用户终端 120在接收到该通知消息后, 在基站 110通知 的分量载波上关闭检测。 这样做的好处是节省了用户终端 120的功率 和处理资源。 在一个实施例中, 基站 110也可以仅通知用户终端 120 在其通知基站 110的那些最终无线链路失败的分量载波中的部分分量 载波上关闭检测。
可选地, 在用户终端 120接收到来自基站 110的通知消息以前,
用户终端 120还可以在每个无线链路最终失败的下行分量载波上检测 无线链路恢复。 如果在某个下行分量载波上检测到无线链路恢复, 则 通知基站 110。
例如, 如用户终端 120将在分量载波 CC1和 CC2上检测到无线 链路最终失败的事实通知给基站 110 , 则基站 110通知用户终端 120 在分量载波 CC1和 CC2上关闭检测, 也即让用户终端 120放弃分量 载波 CC1和 CC2。 基站 110也可以仅通知用户终端 120在分量载波 CC1上关闭检测, 或者仅通知用户终端 120在分量载波 CC2上关闭 检测。
可选地, 基站 110在接收到用户终端 120的指示其最终无线链路 失败的通知后, 还可以为用户终端 120分配至少一个新的分量载波, 并发送资源分配通知消息至用户终端 120, 该资源分配通知消息用于 通知用户终端 120基站为其分配的至少一个新的分量载波, 并指示用 户终端 120在该至少一个新的分量载波上检测无线链路失败。
以上对从用户终端的角度, 对多载波无线通信系统中, 用户终端 说明, 以下从基站的角度, 结合图 1和图 3 , 对多载波无线通信系统 中, 基站中用于对用户终端中无线链路失败的处理流程进行详细说 明。
首先, 在步骤 S301 中, 基站 110发送配置消息至用户终端 120, 该配置消息用于配置用户终端 120在至少一个下行分量载波检测无线 链路失败。 该配置的至少一个分量载波用于下行控制信令的传输和 / 或下行数据的传输。
接着, 在步骤 S302中, 基站 110确定用户终端 120是否在被配 置的至少一个下行分量载波中至少一个下行分量载波上无线链路出 现最终失败。
基站 110确定用户终端 120在一个分量载波上无线链路最终失败 的情形有多种, 下文对此进行举例说明。
在一个实施例中, 在图 3所示的步骤 S302之前, 基站 110接收
来自用户终端 120的指示其被配置的至少一个下行分量载波中至少一 个分量载波出现无线链路失败的通知。 然后, 在步骤 S302 中, 基站 110根据该通知得知用户终端 120在哪些分量载波上无线链路链路最 终失败。
在另一个实施例中, 基站 110接收来自用户终端 120在被配置的 至少一个下行分量载波中至少一个分量载波上的信道质量指示信息。 然后, 在步骤 S302中, 基站 110根据用户终端 120被配置的至少一 个下行分量载波中至少一个分量载波上的信道质量指示信息来确定 用户终端 120是否在被配置至少一个下行分量载波中的至少一个分量 载波上出现了无线链路失败。
如果在第四预定时间长度内, 用户终端 120在一个下行分量载波 上的信道质量低于预定质量的次数达到了第一预定次数, 则基站 110 确定在该下行分量载波上检测到了无线链路临时失败, 然后开始计 时, 如果在第二预定时间长度内, 该下行分量载波上的信道质量仍然 一直低于预定质量或者高于预定质量的次数低于第二预定次数, 则基 站 110确定用户终端 120在该分量载波上无线链路最终失败。
接着, 在步骤 S303 中, 如果基站 110确定用户终端 120在被配 置的至少一个下行分量载波中至少一个下行分量载波上出现了无线 链路最终失败, 则为用户终端 120分配新的至少一个下行分量载波。
最后, 在步骤 S304中, 基站 110发送一个资源分配通知消息至 用户终端 120, 该资源分配消息用于通知用户终端 120基站为其分配 的新的至少一个下行分量载波。
可选地, 在步骤 S303之后, 基站 110还可通知用户终端 120在 至少一个新的分量载波上检测无线链路失败。
例如, 如用户终端 120在分量载波 CC1和 CC2上无线链路最终 失败, 则基站 110可以将分量载波 CC4和 CC5分给用户终端 120, 并指示用户终端 120在分量载波 CC4和 CC5上检测无线链路失败。 当然, 由于分量载波 CC3 上没有检测到无线链路最终失败, 用户终 端 120会在分量载波 CC3、 CC4和 CC5上检测无线链路失败。
如果用户终端 120在分量载波 CC1、 CC2和 CC3上无线链路最 终失败,则意味着基站 110与用户终端 120之间的下行链路全部失败, 基站 110的控制信令或数据无法到达用户终端 120, 也即基站 110失 去了对用户终端 120的控制, 此时, 只能通过用户终端 120 自己进行 重新连接来解决。
可选地, 在基站 110在步骤 S302中确定了用户终端 120在被配 置的至少一个下行分量载波中至少一个下行分量载波上出现了无线 链路最终失败后, 基站 110可发送一个通知消息至用户终端 120, 该 通知消息用于通知用户终端 120在最终失败的至少一个被配置的下行 分量载波上关闭检测。 如上文所述, 在一个实施例中, 基站 110也可 以仅通知用户终端 120在那些最终无线链路失败的分量载波中的部分 分量载波上关闭检测。
图 4示出了根据本发明的一个具体实施例的在无线通信网络的用 户终端中用于检测下行无线链路失败的检测装置 400的结构框图。在 图 4中, 检测装置 400包括第一接收装置 401、 第一确定装置 402、 第一计时装置 403和第二确定装置 404。 为简明起见, 还有一些子装 置未在图 4中示出。
以下结合图 1 , 对位于用户终端 120中的检测装置 400检测下行 无线链路失败的过程进行详细描述。
首先, 第一接收装置 401接收来自基站 110的配置消息, 该配置 消息用于配置用户终端 120在至少一个下行分量载波上检测无线链路 失败。 在一个实施例中, 如分量载波 CC1、 CC2和 CC3分配给用户 终端 120用于下行控制信令的传输和 /或下行数据的传输, 则基站 1 10 配置用户终端 120在分量载波 CC1、 CC2和 CC3上检测无线链路失 败。
接着, 第一确定装置 402确定是否在每个被配置的下行分量载波 上检测到了无线链路最终失败。
可选地, 检测装置 400还包括一个临时失败检测装置、 第二计时 装置和第三确定装置, 用于确定一个或多个下行分量载波上的无线链
路最终失败。
在一个实施例中, 一个下行分量载波无线链路最终失败的含义是 指, 在一个预定时间长度内, 临时失败检测装置在该分量载波上检测 到无线链路临时失败后, 则第二计时装置开始计时, 在第二预定时间 长度内, 如果没有检测到无线链路恢复, 则第三确定装置确定该链路 最终失败; 如果检测到无线链路恢复, 则第三确定装置确定该链路最 终没有失败。 在第二预定时间长度内的无线链路失败称为无线链路临 时失败。
具体地, 临时失败检测装置在一个分量载波上检测到无线链路临 时失败的情形有多种, 下文对此进行举例说明。
在一个实施例中, 临时失败检测装置在第三预定时间长度内, 在 一个被配置的下行分量载波上检测到了第一预定数目的强度值低于 预定阈值的无线参考信号, 例如 LTE中所定义的 out-sync信号, 则确 定在该被配置的下行分量载波上检测到了无线链路临时失败。 第二计 时装置从无线链路临时失败开始计时, 如果在第二预定时间长度内, 没有在该分量载波上检测到了第二预定数目的强度值高于预定阈值 的无线参考信号, 例如 LTE中所定义的 in-sync信号, 则第三确定装 置确定在该被配置的下行分量载波上检测到了无线链路最终失败。
需要说明的是, 确定不同分量载波是否无线链路临时失败的标准 可以一样, 也可以不一样。 例如, 如果在第三预定时间长度内, 在分 量载波 CC1检测到了 Ml个强度值低于预定阔值的信号,则认为在分 量载波 CC1 上检测到了无线链路临时失败; 如果在第三预定时间长 度内, 在分量载波 CC2检测到了 N1个强度值低于预定阈值的信号, 则认为在分量载波 CC2 上检测到了无线链路临时失败, N1 不等于 Ml。 另外, 对于不同的分量载波, 预定阈值的取值也可能相同, 也 可能不同。
第二计时装置从无线链路临时失败起开始计时, 如果在第二预定 时间长度内,在分量载波 CC1上检测到了 M2个强度值高于预定阔值 的信号, 如 LTE中定义的 in-sync信号, 则第三确定装置认为在分量
载波 CC1上检测到了无线链路恢复, 则移去分量载波 CC1上无线链 路临时失败的状态。 如果在第二预定时间长度内, 在分量载波 CC2 上检测到了 N2 个强度值高于预定阈值的信号, 如 LTE 中定义的 in-sync信号, 则第三确定装置确定在分量载波 CC2上检测到了无线 链路恢复, 则移去分量载波 CC2上无线链路临时失败的状态。 N2不 等于 M2。
在另一个实施例中, 临时失败检测装置在第四预定时间长度内, 确定一个配置的下行分量载波上, 如 CC3 上, 的信道质量一直低于 预定质量, 或者信道质量低于预定质量的次数达到一个第一预定次数 则确定在该被配置的下行分量载波上检测到了无线链路临时失败。
第二计时装置从无线链路临时失败开始计时, 如果在第二预定时 间长度内, 检测到在该分量载波上的信道质量高于预定质量的次数高 于第二预定次数, 则第三确定装置确定在该分量载波上检测到了无线 链路恢复, 则移去该分量载波上无线链路临时失败的状态。
需要说明的是, 对于不同的分量载波, 预定质量标准可能相同, 也可能不同。
可选地, 第三确定装置在确定一个被配置的下行分量载波上无线 链路最终失败后, 还可以在该无线链路最终失败的下行分量载波上继 续检测无线链路恢复, 如果检测到无线链路恢复, 则移去该分量载波 无线链路最终失败的状态。 在一个实施例中, 如果基站 110通知检测 装置 400不在该无线链路最终失败的下行分量载波上继续检测无线链 路恢复, 则检测装置 400关闭检测, 下文将会对此进行详细描述。
接着, 如果在每个被配置的下行分量载波上检测到了无线链路最 终失败, 则第一计时装置 403开始计时。 例如, 第一计时装置 403可 以是一个定时器。
最后, 如果在第一预定时间长度内, 没有在任何被配置的下行分 量载波上检测无线链路恢复, 则第二确定装置 404确定下行链路无线 链路失败。 下行链路无线链路失败的含义是指在用户终端 120所有被 配置的下行分量载波无线链路最终失败。
在一个实施例中, 如果在第一预定时间长度内, 没有在任一个被 配置的下行分量载波上检测到了第三预定数目的强度值高于预定阈 值的无线参考信号, 例如 LTE中所定义的 in-sync信号, 则第二确定 装置 404 确定没有在任何被配置的下行分量载波上检测无线链路恢 复, 则确定下行链路无线链路失败。
需要说明的是, 确定不同分量载波是否无线链路恢复的标准可以 一样, 也可以不一样。 例如, 如果在第一预定时间长度内, 在分量载 波 CC1检测到了 X个强度值高于预定阔值的信号, 则认为在分量载 波 CC1 上检测到了无线链路恢复; 如果在第一预定时间长度内, 在 分量载波 CC2检测到了 Y个强度值高于预定阈值的信号, 则认为在 分量载波 CC2上检测到了无线链路恢复, X不等于 Y。 另外, 对于不 同的分量载波, 预定阔值的取值也可能相同, 也可能不同。
在另一个实施例中, 如果在第一预定时间长度内, 没有在任一个 被配置的下行分量载波上检测到了第三预定次数或以上的信道质量 高于预定质量, 则第二确定装置 404确定没有在任何被配置的下行分 量载波上检测无线链路恢复, 则确定下行链路无线链路失败。 对于不 同的分量载波, 预定质量标准可能相同, 也可能不同。
在第二确定装置 404确定下行无线链路失败后, 用户终端 120不 会再在任何被配置的下行分量载波上检测无线链路恢复了, 而是重新 建立无线连接。 用户终端 120可能与基站 110重新建立无线连接, 有 可能与其它基站(未在图 1 中示出)建立无线连接。在一个实施例中, 用户终端 120在检测到每个下行分量载波上的无线链路最终失败后, 通知上层, 如 RRC层, RRC层在所有的被配置的下行分量载波上出 现无线链路最终失败后, 也即下行链路的无线链路最终失败后, 重新 建立无线连接。
以上对用户终端 120如何确定整个下行无线链路失败的情形进行 了详细说明。
可选地, 在第三确定装置在检测到一个或多个被配置的分量载波 上的无线链路最终失败时,检测装置 400还可以包括一个第一通知装
置, 用于可以通知基站 110被配置的至少一个下行分量载波中至少一 个分量载波上的无线链路最终失败。 在一个实施例中, 第一通知装置 还可以仅将部分分量载波的无线链路最终失败通知给基站 110。例如, 如第三确定装置在分量载波 CC1和 CC2上检测到了无线链路最终失 败, 则第一通知装置将在分量载波 CC1和 CC2上检测到无线链路最 终失败的事实通知给基站 110。 第一通知装置也可仅将在分量载波 CC1上检测无线链路最终失败的事实通知给基站 110 , 或者是仅将分 量载波 CC2上检测无线链路最终失败的事实通知给基站 110。
可选地, 基站 110在接收到用户终端 120的通知后, 发送一个通 知消息给用户终端 120, 以通知用户终端 120在最终失败的至少一个 被配置的下行分量载波上关闭检测, 也即关闭无线链路恢复和无线链 路失败检测。 第一接收装置 401在接收到该通知消息后, 在基站 110 通知的分量载波上关闭检测。 这样做的好处是节省了用户终端 120的 功率和处理资源。 在一个实施例中, 基站 110也可以仅通知用户终端 120在其通知基站 110的那些最终无线链路失败的分量载波中的部分 分量载波上关闭检测。
可选地, 在第一接收装置 401接收到来自基站 110的通知消息以 前,检测装置 400还可以在每个无线链路最终失败的下行分量载波上 检测无线链路恢复。 如果在某个下行分量载波上检测到无线链路恢 复, 则通知基站 110。
例如, 如第一通知装置将在分量载波 CC1和 CC2上检测到无线 链路最终失败的事实通知给基站 110, 则基站 110通知用户终端 120 在分量载波 CC1和 CC2上关闭检测, 也即让用户终端 120放弃分量 载波 CC1和 CC2。 基站 110也可以仅通知用户终端 120在分量载波 CC1上关闭检测, 或者仅通知用户终端 120在分量载波 CC2上关闭 检测。
可选地, 基站 110在接收到用户终端 120的指示其最终无线链路 失败的通知后, 还可以为用户终端 120分配至少一个新的分量载波, 并发送资源分配通知消息至用户终端 120, 该资源分配通知消息用于
通知用户终端 120基站为其分配的至少一个新的分量载波, 并指示用 户终端 120在该至少一个新的分量载波上检测无线链路失败。
以上对从用户终端的角度, 对多载波无线通信系统中, 用户终端 中的检测装置 400如何检测下行无线链路失败的过程以及对应的处理 过程进行了详细说明。
图 5示出了根据本发明的一个具体实施方式的在无线通信网络的 基站中用于对用户终端中无线链路失败进行处理的处理装置 500的结 构框图。 在图 5中, 处理装置 500包括发送装置 501、 第四确定装置 502和分配装置 503。 以下结合图 1, 对多载波无线通信系统中, 基 过程进行详细说明。
首先, 发送装置 501发送配置消息至用户终端 120 , 该配置消息 用于配置用户终端 120在至少一个下行分量载波检测无线链路失败。 该配置的至少一个分量载波用于下行控制信令的传输和 /或下行数据 的传输。
接着, 第四确定装置 502确定用户终端 120是否在被配置的至少 一个下行分量载波中至少一个下行分量载波上无线链路出现最终失 败。
第四确定装置 502确定用户终端 120在一个分量载波上无线链路 最终失败的情形有多种, 下文对此进行举例说明。
在一个实施例中, 处理装置 500还包括一个第二接收装置(未在 图 5 中示出), 用于接收来自用户终端 120的指示其被配置的至少一 个下行分量载波中至少一个分量载波出现无线链路失败的通知。 然 后, 第四确定装置 502根据该通知得知用户终端 120在哪些分量载波 上无线链路链路最终失败。
在另一个实施例中, 第二接收装置接收来自用户终端 120在被配 置的至少一个下行分量载波中至少一个分量载波上的信道质量指示 信息。 然后, 第四确定装置 502根据用户终端 120被配置的至少一个 下行分量载波中至少一个分量载波上的信道质量指示信息来确定用
户终端 120是否在被配置至少一个下行分量载波中的至少一个分量载 波上出现了无线链路失败。
如果在第四预定时间长度内, 用户终端 120在一个下行分量载波 上的信道质量低于预定质量的次数达到了第一预定次数, 则第四确定 装置 502确定在该下行分量载波上检测到了无线链路临时失败, 然后 开始计时, 如果在第二预定时间长度内, 该下行分量载波上的信道质 量仍然一直低于预定质量或者高于预定质量的次数低于第二预定次 数, 则第四确定装置 502确定用户终端 120在该分量载波上无线链路 最终失败。
如果第四确定装置 502确定用户终端 120在被配置的至少一个下 行分量载波中至少一个下行分量载波上出现了无线链路最终失败, 则 分配装置 503为用户终端 120分配新的至少一个下行分量载波。
最后,发送装置 501发送一个资源分配通知消息至用户终端 120, 该资源分配消息用于通知用户终端 120基站为其分配的新的至少一个 下行分量载波。可选地,发送装置 501还可发送一个指示用户终端 120 在至少一个新的分量载波上检测无线链路失败的通知至用户终端 120。
例如, 如用户终端 120在分量载波 CC1和 CC2上无线链路最终 失败,则分配装置 503可以将分量载波 CC4和 CC5分给用户终端 120, 并指示用户终端 120在分量载波 CC4和 CC5上检测无线链路失败。 当然, 由于分量载波 CC3 上没有检测到无线链路最终失败, 用户终 端 120会在分量载波 CC3、 CC4和 CC5上检测无线链路失败。
如果用户终端 120在分量载波 CC1、 CC2和 CC3上无线链路最 终失败,则意味着基站 110与用户终端 120之间的下行链路全部失败, 基站 110的控制信令或数据无法到达用户终端 120, 也即基站 110失 去了对用户终端 120的控制, 此时, 只能通过用户终端 120 自己进行 重新连接来解决。
可选地, 在第四确定装置 502确定了用户终端 120在被配置的至 少一个下行分量载波中至少一个下行分量载波上出现了无线链路最
终失败后, 发送装置 501发送一个通知消息至用户终端 120, 该通知 消息用于通知用户终端 120在最终失败的至少一个被配置的下行分量 载波上关闭检测。 如上文所述, 在一个实施例中, 基站 110也可以仅 通知用户终端 120在那些最终无线链路失败的分量载波中的部分分量 载波上关闭检测。
本领域的普通技术人员应能理解, 本发明适用于一般的多分量载 波的无线通信系统。 另外一个需要说明的, 本文中的各个预定时间长 度、 预定数目、 预定次数和预定阈值的取值可随实际系统的具体实现 而有所不同。例如,第三预定时间长度可以与第四预定时间长度相同。
需要说明的是, 上述实施例仅是示范性的, 而非对本发明的限制。 任何不背离本发明精神的技术方案均应落入本发明的保护范围之内。 此 外, 不应将权利要求中的任何附图标记视为限制所涉及的权利要求; "包 括"一词不排除其它权利要求或说明书中未列出的装置或步骤;装置前的 "一个" 不排除多个这样的装置的存在; 在包含多个装置的设备中, 该 多个装置中的一个或多个的功能可由同一个硬件或软件模块来实现; "第 一,,、 "第二"、 "第三" 等词语仅用来表示名称, 而并不表示任何特定的 顺序。
Claims
1. 一种在无线通信网络的用户终端中用于检测下行无线链路失 败的方法, 该方法包括以下步骤:
- 接收来自基站的配置消息, 该配置消息用于配置所述用户终端 在至少一个下行分量载波检测无线链路失败;
该方法还包括以下步骤:
A. 确定是否在每个被配置的下行分量载波上检测到了无线链路 最终失败;
B. 如果在每个被配置的下行分量载波上检测到了无线链路最终 失败, 则开始计时;
C. 如果在第一预定时间长度内, 没有在任何被配置的下行分量 载波上检测无线链路恢复, 则确定下行链路无线链路失败。
2. 根据权利要求 1所述的方法, 其中, 在所述步骤 C之后还包 括以下步骤:
D. 重新建立无线连接。
3. 根据权利要求 1所述的方法, 还包括以下步骤:
a. 如果在一个被配置的下行分量载波上检测到无线链路临时失 败, 则开始计时;
b. 如果在第二预定时间长度内,在所述被配置的下行分量载波上 没有检测到无线链路恢复, 则确定该所述被配置的下行分量载波上的 无线链路最终失败。
4. 根据权利要求 3所述的方法, 其中, 在所述 b之后还包括以 下步骤:
- 在所述无线链路最终失败的下行分量载波上继续检测无线链 路恢复。
5. 根据权利要求 3所述的方法, 还包括以下步骤:
- 通知所述基站所述被配置的至少一个下行分量载波中至少一 个分量载波上的无线链路最终失败。
6. 根据权利要求 5所述的方法, 还包括以下步骤:
- 接收来自所述基站的通知消息, 该通知消息用于通知所述用户 终端在所述最终失败的至少一个被配置的下行分量载波上关闭检测。
7. 根据权利要求 5所述的方法, 还包括以下步骤:
- 接收来自所述基站的资源分配通知消息, 该资源分配通知消息 用于通知所述用户终端为其分配的至少一个新的分量载波。
8. 根据权利要求 7所述的方法, 还包括以下步骤:
- 接收来自所述基站的用于指示所述用户终端在所述至少一个 新的分量载波上检测无线链路失败的通知。
9. 根据权利要求 3 所述的方法, 所述在每个被配置的下行分量 载波上检测到了无线链路临时失败的方法包括以下步骤:
- 在第三预定时间长度内, 在每个下行分量载波上检测到了预定 数目的强度值低于预定阈值的无线参考信号; 或者
- 在第四预定时间长度内, 每个下行分量载波的信道质量低于预 定质量。
10. 一种在无线通信网络的基站中用于用户终端中无线链路失败 的处理方法, 包括:
- 发送配置消息至所述用户终端, 该配置消息用于配置所述用户 终端在至少一个下行分量载波检测无线链路失败;
该方法还包括以下步骤:
I. 确定所述用户终端是否在所述被配置的至少一个下行分量载 波中至少一个下行分量载波上出现无线链路最终失败;
11. 如果所述用户终端在所述被配置的至少一个下行分量载波中 至少一个下行分量载波上出现了无线链路最终失败, 则为所述用户终 端分配新的至少一个下行分量载波;
III. 发送一个资源分配通知消息至所述用户终端, 该资源分配消 息用于通知所述用户终端为其分配的新的至少一个下行分量载波。
I I . 根据权利要求 10所述的方法, 其中, 在所述步骤 II之后还 包括以下步骤: - 通知所述用户终端在所述至少一个新的分量载波上检测无线 链路失败。
12. 根据权利要求 10所述的方法, 其中, 在所述步骤 I之后还 包括以下步骤:
- 如果所述用户终端在所述被配置的至少一个下行分量载波中 至少一个下行分量载波上出现了无线链路最终失败, 发送一个通知消 息至所述用户终端, 该通知消息用于通知所述用户终端在所述最终失 败的至少一个被配置的下行分量载波上关闭检测。
13. 根据权利要求 9所述的方法, 其中, 在所述步骤 I之前还包 括以下步骤:
- 接收来自所述用户终端的指示所述被配置的至少一个下行分 量载波中至少一个分量载波出现无线链路最终失败的通知; 或者
在所述步骤 I之前还包括以下步骤:
- 接收来自所述用户终端的在所述被配置的至少一个下行分量 载波中至少一个分量载波上的信道质量指示信息;
其中, 所述步骤 I还包括以下步骤:
- 根据所述被配置的至少一个下行分量载波中至少一个分量载 波上的信道质量指示信息来确定所述用户终端是否在所述被配置至 少一个下行分量载波中的至少一个分量载波上出现了无线链路最终 失败。
14. 一种在无线通信网络的用户终端中用于检测下行无线链路失 败的检测装置, 包括:
第一接收装置, 用于接收来自基站的配置消息, 该配置消息用于 配置所述用户终端在至少一个下行分量载波检测无线链路失败;
第一确定装置, 用于确定是否在每个被配置的下行分量载波上检 测到了无线链路最终失败;
第一计时装置, 用于如果在每个被配置的下行分量载波上检测到 了无线链路最终失败, 则开始计时;
第二确定装置, 用于如果在第一预定时间长度内, 没有在任何被 配置的下行分量载波上检测无线链路恢复, 则确定下行链路无线链路 失败。
15. 一种在无线通信网络的基站中用于用户终端中无线链路失败 的处理装置, 包括:
发送装置, 用于发送配置消息至所述用户终端, 该配置消息用于 配置所述用户终端在至少一个下行分量载波检测无线链路失败;
第四确定装置, 用于确定所述用户终端是否在所述被配置的至少 一个下行分量载波中至少一个下行分量载波上出现无线链路最终失 败;
分配装置, 用于如果所述用户终端在所述被配置的至少一个下行 分量载波中至少一个下行分量载波上出现了无线链路最终失败, 则为 所述用户终端分配新的至少一个下行分量载波;
所述发送装置还用于:
- 发送一个资源分配通知消息至所述用户终端, 该资源分配消息 用于通知所述用户终端为其分配的新的至少一个下行分量载波, 并指 示所述用户终端在所述至少一个新的分量载波上检测无线链路失败。
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| CN111357213B (zh) * | 2017-11-07 | 2022-04-05 | 华为技术有限公司 | 无线网络中波束恢复的方法和设备 |
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