TWI479928B - Method and apparatus for processing entity random access channel transmission based on carrier aggregation - Google Patents

Description

Method and device for processing entity random access channel transmission based on carrier aggregation

The present invention relates to information transmission on a physical random access channel of a wireless network, and in particular, a user terminal of a wireless network selects uplink for transmitting information on a physical random access channel (PRACH) among a plurality of uplink component carriers. Method and apparatus for component carriers.

In a Long Term Evolution (LTE) system, a user terminal is generally configured with a carrier having a bandwidth of no more than 20 MHz. Since there is only one carrier, the user terminal does not involve the problem of carrier selection when transmitting information on the random access channel of the entity.

The improved Long Term Evolution (LTE-Advanced, LTE-A) system introduces the concept of carrier aggregation based on the LTE system, including continuous carrier aggregation and discontinuous carrier aggregation. The maximum bandwidth after aggregation is 100 MHz. . At the same time, in order to make the carrier aggregation technology backward compatible with LTE, the 100 MHz bandwidth is divided into five component carriers (CCs) with a maximum bandwidth of 20 MHz, and each of the component carriers should be configured to be backward compatible with LTE. Carrier. For a user terminal, it can be configured with 1 to 5 component carriers. As a result, not only the available bandwidth is multiplied more than before, but the evolved Node B (hereinafter referred to as the base station) also has greater flexibility in scheduling the uplink data transmission of the user terminal.

In the prior art, there is no such a solution, so that the configuration is A user terminal of a plurality of uplink component carriers can select an uplink component carrier when it is required to perform transmission on the physical random access channel.

The solution provided by the present invention may be advantageous for a user terminal configured with multiple uplink component carriers to select an uplink component carrier for performing transmission on a physical random access channel.

Specifically, according to an embodiment of the present invention, there is provided a method for transmitting a random access request on a random access channel of a sending entity in a user terminal, wherein the user terminal is configured with multiple entities An uplink component carrier of a random access channel, the method comprising the steps of: b. determining an uplink component carrier among the plurality of uplink component carriers, the step b comprising performing one of the following operations: from the multiple uplinks Determining, in the component carrier, an uplink component carrier; determining, from the plurality of uplink component carriers, an uplink component carrier of the paired downlink component carrier with a better channel condition; determining from the plurality of uplink component carriers Performing an uplink component carrier for transmission on the physical random access channel; determining an uplink component carrier as the primary uplink component carrier; c. transmitting the random to the management device on the entity random channel carried by the determined uplink component carrier Access request.

According to another embodiment of the present invention, there is provided a method for transmitting a random access request after a scheduling request transmission failure in a user terminal, wherein the user terminal is configured to include the primary uplink component carrier An uplink component carrier with a physical random access channel, the method including The following steps: A. determining one uplink component carrier from the multiple uplink component carriers, the step A includes performing any one of the following: removing the uplink from the multiple uplink component carriers except the primary uplink component carrier Determining, in the component carrier, an uplink component carrier capable of transmitting on the entity random access channel and/or corresponding to a downlink component carrier having better channel conditions; dividing the plurality of uplink component carriers by the main uplink component carrier One uplink component carrier is randomly determined among each uplink component carrier; B. the random access request is transmitted through the entity random access channel carried by the determined uplink component carrier.

According to still another embodiment of the present invention, there is provided a method for switching from being governed by a jurisdiction of a first management device to being governed by a second management device in a user terminal, comprising the steps of: receiving the second And managing, by the device, a handover command, where the information about the uplink component carrier with the physical random access channel is included; m. determining an uplink component from the plurality of uplink component carriers according to the handover command and a predetermined rule The carrier; n. performs the handover by the determined uplink component carrier; if the handover performed in the step n is unsuccessful, the step mn is repeatedly executed until the handover succeeds or the predetermined condition is met.

According to still another embodiment of the present invention, a method for controlling an uplink physical channel carried by a plurality of uplink component carriers configured for a user terminal in a management device includes the following steps: determining the user terminal Whether the message is requested on the physical random access channel carried by another uplink component carrier other than the primary uplink component carrier and causes the request to succeed; if the user terminal is on another uplink component carrier other than the primary uplink component carrier If the request message is sent on the entity random access channel and the request is successful, the other uplink component carrier is determined as the primary uplink component carrier of the user terminal.

According to still another embodiment of the present invention, there is provided a first apparatus for transmitting a random access request on a physical random access channel in a user terminal, wherein the user terminal is configured with a plurality of randomized entities Accessing the uplink component carrier of the channel, the first device includes: a second unit, configured to perform one of: determining an uplink component carrier from the plurality of uplink component carriers: from the multiple uplink components Determining, in the carrier, an uplink component carrier; determining, from the plurality of uplink component carriers, an uplink component carrier of the paired downlink component carrier with a better channel condition; determining from the plurality of uplink component carriers can be performed earlier An uplink component carrier transmitted on the physical random access channel; determining an uplink component carrier as a primary uplink component carrier; and a first transmitter for an entity random channel carried by the uplink component carrier determined by the second unit The random access request is sent to the management device.

According to still another embodiment of the present invention, there is provided a second apparatus for transmitting a random access request after a scheduling request transmission failure in a user terminal, wherein the user terminal is configured to include the primary uplink component carrier a plurality of uplink component carriers with physical random access channels, the second device comprising: a third unit, configured to perform any one of: determining an uplink component from the plurality of uplink component carriers Carrier: determining, from the plurality of uplink component carriers, each of the uplink component carriers other than the primary uplink component carrier, that the transmission on the physical random access channel can be performed earlier and/or Or an uplink component carrier corresponding to a downlink component carrier with better channel conditions; randomly determining an uplink component carrier from each of the plurality of uplink component carriers except the primary uplink component carrier; and transmitting the second component And the method is configured to send the random access request by using a physical random access channel carried by the determined uplink component carrier.

According to still another embodiment of the present invention, there is provided a third apparatus for switching from being governed by a first management device to being governed by a second management device in a user terminal, comprising: a receiver for receiving a switching command sent by the second management device, where the information about the uplink component carrier with the physical random access channel is included, and the fourth unit is configured to determine, according to the handover command, the multiple uplink component carriers. An uplink component carrier; and a fifth unit, configured to perform the handover by using the determined uplink component carrier; wherein if the handover performed by the fifth unit is unsuccessful, the fourth and fifth units repeatedly perform corresponding operations Until the handover is successful or the predetermined condition is met.

According to still another embodiment of the present invention, there is provided a fourth apparatus, in a management device, for controlling an uplink physical channel carried by a plurality of uplink component carriers configured for a user terminal, comprising: determining means, Determining whether the user terminal sends a request message on an entity random access channel carried by another uplink component carrier other than the primary uplink component carrier, and causes the request to succeed; and a sixth unit, if the user terminal is in the primary uplink component If the request message is sent on the physical random access channel carried by another uplink component carrier other than the carrier and the request is successful, the other uplink component carrier is determined as the primary uplink component carrier of the user terminal.

By utilizing the method and apparatus provided by the present invention, a user terminal can select an appropriate uplink component carrier for information on a Physical Random Access Channel (PRACH) under carrier aggregation conditions, thereby optimizing a random access procedure, a handover procedure, and resources. Request process.

detailed description

The specific embodiments of the present invention are described in detail below with reference to the accompanying drawings. While the LTE-A system is mainly taken as an example, those skilled in the art understand that the present invention can be applied to any of a variety of multiple carrier scenarios, and these embodiments are only for the purpose of illustrating the present invention, and not limiting.

Referring to Figure 1, a typical application scenario of the present invention is shown. Among them, the user terminals 20, 21 (for example, mobile phones, hereinafter referred to as the mobile phone 20 and the mobile phone 21) and their associated management devices 10, 11 (for example, a base station, hereinafter referred to as a base station 10 and a base station 11), and a base station 10 are shown. The other side of 11 is the Mobility Management Entity/Service Gateway (MME/S-GW).

The following discussion of the user terminal is mainly based on the mobile phone 20, and those skilled in the art understand that the same description can also be applied to the mobile phone 21 and other user terminals not shown in the figure. According to an embodiment of the present invention, the mobile phone 20 is configured with five uplink component carriers for the null intermediaries between the mobile phone 20 and the base station 10, and is respectively recorded as the uplink component carrier a-e. It is assumed that the uplink component carriers a-e each carry a PRACH, that is, a time-frequency resource (for example, a resource block RB) for the PRACH is defined in advance on the uplink component carrier a-e. Therefore, the above selection of the uplink component carrier is specifically a selection of an uplink component carrier with a PRACH. It should be understood that the foregoing example that the mobile phone 20 is configured with five uplink component carriers and all with the PRACH is non-limiting, and the present invention is equally applicable to the number of uplink component carriers being other values and/or the uplink component carrier with the PRACH therein. The number of other values is the case. As such other examples, the handset 20 is configured with 3 uplink component carriers, and 2 of the uplink component carriers carry PRACH.

Generally, each uplink component carrier corresponds to one downlink component carrier. Therefore, when a user terminal is configured with multiple uplink component carriers, a plurality of downlink component carriers are also configured, and the number of downlink component carriers can be Greater than, equal to, or less than the number of uplink component carriers. Without loss of generality, the mobile terminal 20 is configured with five downlink component carriers. To indicate the correspondence between the mobile component and the uplink component carrier, these downlink component carriers are also recorded as ae, wherein the uplink component carrier a corresponds to the downlink. Component carrier a, and so on. Certainly, according to at least one embodiment of the present invention, the downlink component carrier corresponding to one uplink component carrier may be in a deactive or activated state, and an uplink component carrier corresponding to the inactive downlink component carrier is also the same. There are opportunities to be chosen. For example, when the downlink component carrier a is in the active state, it is referred to as an activated paired downlink component carrier of the uplink component carrier a.

Typically, the scenario in which the mobile phone 20 needs to select an uplink component carrier for information transmission using PRACH includes: scheduling request transmission failure, handover, and uplink or downlink data arrival but loss of uplink synchronization, where handover refers to the jurisdiction of the base station. The handover can also be understood as an inter-cell handover. Take The uplink component carrier selection in these scenarios is explained separately, taking the case of the above five optional uplink component carriers a-e as an example.

Referring to Fig. 2, there is shown in general a specific flow of an example of selecting an uplink component carrier when uplink or downlink data arrives but uplink synchronization is lost and scheduling request transmission fails.

First, in step S200, the handset 20 needs to determine the condition for determining the random access failure, that is, the UL RLF, that is, the uplink component carrier selection in this example is closely related to the above decision condition. For example, there may be multiple conditions for determining a random access failure in the system, and the base station 10 of the jurisdictional community determines and notifies each user terminal in the community, and step S200 can thereby be implemented as a representation broadcasted by the receiving base station 10. The decision condition is specific type of indication information, and according to the previous agreement with each user terminal, each user terminal including the mobile phone 20 can clearly and unambiguously determine the specific applicable decision condition based on the indication information. Alternatively, according to a more fixed example, each user terminal pre-stores a decision condition and, when an application is needed, invokes the condition and sequentially makes subsequent uplink component carrier selections.

The conditions for determining a random access failure may include:

Condition (1): If the random access request transmitted on the PRACH carried by the primary uplink component carrier does not cause the request to succeed, it is determined that the random access of the user terminal fails.

Condition (2): If the random access request transmitted on the physical random access channel carried by any of the plurality of uplink component carriers does not cause the request to succeed, it is determined that the random access of the user terminal fails.

Condition (3): If the random access request transmitted on the physical random access channel carried by all the uplink component carriers among the plurality of uplink component carriers does not cause the request to succeed, it is determined that the random access of the user terminal fails.

Condition (4): if the random access request transmitted on the physical random access channel carried by all the uplink component carriers of the activated paired downlink component carrier in the plurality of uplink component carriers does not cause the request to succeed, it is determined that the request is successful The random access of the user terminal failed.

The primary uplink component carrier, that is, a predefined preset uplink component carrier, is generally preset to use the primary uplink component carrier when the PRACH transmission is required. The pre-definition of the primary uplink component carrier may be implemented by means of notification by the base station. For example, the base station 10 notifies the mobile phone 20 of the primary uplink component carrier by using RRC signaling or MAC layer signaling, for example, if the primary uplink component carrier changes, for example, from a. Changing to d can also be notified using RRC or MAC layer signaling. Generally, an uplink component carrier configured with a physical uplink control channel (PUCCH) is regarded as a primary uplink component carrier.

In this paper, after a random access request is sent, the base station's response is not obtained, or even if the base station responds, but the resolution process fails, the access random access request (or simply the request) fails to cause the request to succeed, or If the request fails to meet the purpose, the reasons for the request not reaching the goal mainly include two types. First, the wireless condition of the channel is too poor, the random access request is not received by the base station correctly, and the second is competition, although the base station correctly receives the random. The request is accessed, but because there are other user terminals, the base station does not consider the request of the user terminal, and the request is unsuccessful. At least in LTE-A R10, it is assumed that different uplink component carriers are in approximation The same wireless channel condition, therefore, the request for the wireless condition of the channel is too unsuccessful, meaning that even if the uplink component carrier is replaced, the request will not be successful.

It can be seen that, on the one hand, the above conditions (1), (2) are beneficial to start reconnection as soon as the channel conditions are bad, at the cost that once the reason for the unsuccessful request is competition, the unnecessary reconnection will be due to its Reduce the user experience due to reasons such as time delays. On the other hand, condition (3) enables the user terminal to maintain the existing connection and uplink synchronization as much as possible, which is advantageous for the request to be unsuccessful due to competition, and avoids the interruption of the service caused by unnecessary reconnection. Of course, if the channel conditions are bad and the request is unsuccessful, then the meaning of trying other uplink component carriers to maintain the existing connection and uplink synchronization is not significant.

According to LTE-A, random access failure (UL RLF) will result in reconnection, so the conditions for differently determining random access failures will determine whether to reconnect more quickly or to maintain existing connections as much as possible. The above conditions (1)-(3) and the corresponding uplink component carrier selection scheme for PRACH transmission are introduced below.

Condition (1)

According to this condition, the handset 20 determines the primary uplink component carrier, e.g., the uplink component carrier c, in step S202, and transmits a random access request on the PRACH, such as a random access preamble, on the uplink component carrier c in step S204. When the random access request transmitted on the uplink component carrier c fails to cause the random access to succeed, since the condition (1) has been satisfied, the reconnection is directly performed without attempting other uplink component carriers.

Condition (2)

According to this condition, similarly to condition (1), the handset 20 still only has one chance to send a random access request through the PRACH. Upon failure, the condition (2) is satisfied and the other uplink component carriers cannot be tried. However, the handset 20 does not necessarily select the primary uplink component carrier.

As one of several alternative ways, the handset 20 randomly determines one of the uplink component carriers ae according to the condition (2) in step S202, and the randomly determined uplink component carrier in the subsequent step S204. For example, if a random access request is sent on the PRACH carried by the uplink component carrier a, such as a random access preamble, if the request is not successful, the random access fails and the reconnection is performed.

As another of several alternative ways, advantageously, the handset 20 selects one of the uplink component carriers that results in a greater likelihood of a successful request. Since the mobile phone 20 does not know the channel quality of each uplink component carrier, the mobile phone 20 can ensure the better Message 2/4 performance as a standard. To this end, in step S202, it is determined from the uplink component carrier ae that the channel condition is better. An uplink component carrier of the downlink component carrier, and in the subsequent step S204, transmitting a random access request, such as a random access preamble, on the PRACH carried by the determined uplink component carrier, for example, the uplink component carrier b, if the request is not successful, Declare random access failure and reconnect.

Condition (3)

According to this condition, step S202 can also be performed in a randomly determined manner, and when step S204 is performed on the randomly selected uplink component carrier, the request is successful, and then each uplink component that has not been selected is carried. The wave is randomly selected again, and so on, until all the uplink component carriers a-e have been traversed, which still cannot cause the request to succeed, thereby starting the reconnection, or finally causing the request to succeed through an uplink component carrier.

Alternatively, according to the condition (3), the step S202 may also be performed by determining, from the plurality of uplink component carriers ae, that the transmission on the physical random access channel can be performed earlier and/or the condition corresponding to one channel is better. One uplink component carrier of the downlink component carrier. The method for selecting an uplink component carrier that satisfies the two elements includes: first determining an uplink component carrier that can perform transmission on the PRACH earlier, and if there are multiple carriers having the element, further determining a channel condition corresponding thereto One uplink component carrier of the best downlink component carrier is the result of step S202. If the random access request issued by the PRACH carried by the uplink component carrier determined in step S202 in step S204 fails to cause the request to succeed, the steps S202-S204 are repeatedly performed until the request succeeds or the condition for determining the random access failure is satisfied. That is, traversing the uplink component carrier ae still fails to request success.

The selection process under the condition (4) is similar to the condition (3), and is not described again. The difference is that the carrier selection under the condition (4) is limited to the selection of the uplink component carrier with the activated paired downlink component carrier.

It should be understood that the flow shown in FIG. 2 is only a non-limiting example. According to another specific embodiment of the present invention, step S200 may be omitted, and step S202 is correspondingly simplified to perform one of the following operations. Determining an uplink component carrier in the uplink component carrier ae: randomly determining an uplink component from the uplink component carrier ae And determining, by the uplink component carrier ae, an uplink component carrier of the paired downlink component carrier with the channel condition better starting; determining, from the uplink component carrier ae, an uplink component carrier capable of transmitting earlier on the physical random access channel Determining an uplink component carrier as the primary uplink component carrier.

The mobile phone 20 may select an uplink component carrier according to a preset static configuration information, for example, a configuration information indicating a random selection of an uplink component carrier, or randomly select a determination manner, or receive an indication from the base station 10 and select a determination manner based on the indication. An uplink component carrier is then determined.

Some embodiments of the transmission of random access requests on the PRACH when uplink or downlink data arrives but the uplink synchronization is lost and the scheduling request fails to be transmitted have been described above with reference to FIG. As an alternative, the transmission of the random access request after the failure of the scheduling request transmission on the PRACH may also depend on the determination of the above-mentioned decision condition, and other implementation manners. The following is a detailed description. The scheduling request sent in this article fails to be sent, for example, as defined in LTE-A: after the number of allowed scheduling requests (SR) transmissions is not successful, the scheduling request is sent, and this is also called the row. The request (message) did not result in (scheduled) success. After the SR transmission fails, PRACH transmission needs to be performed. One way has been described in detail with reference to FIG. 2, and another possible manner is described below with reference to FIG.

In general, schedule requests that do not result in a successful request are often subject to poor channel conditions for the upstream component carrier used. This is especially true if the number of requests is sufficient. Therefore, it is reasonable to believe that if the scheduling request on the primary uplink component carrier does not result in a successful request, then issuing a random access on the primary uplink component carrier will also not result in a successful request. Therefore, what to do after the scheduling request on the primary uplink component carrier does not cause the request to succeed is related to the following two questions: 1- whether the PUCCH is accepted to disappear for a period of time; 2) whether the primary uplink component carrier is allowed to be reconnected without being reconnected. Reconfigure.

If the answer to the above two questions is no, then the attempt to schedule the request may end on failing to cause the request to succeed on the original primary uplink component carrier and begin reconnection as soon as possible.

On the contrary, if the answer to the above two questions is affirmative, referring to FIG. 3, the mobile phone 20 will further select another uplink component carrier to send a random access request. Specifically, in step S300, the mobile phone 20 receives the uplink component carrier ae. One uplink component carrier is determined in each uplink component carrier except the primary uplink component carrier, and in S302, the mobile phone 20 transmits a random access request through the PRACH carried by the uplink component carrier determined in step S300.

More specifically, step S300 may be implemented by performing any one of the following: determining, from the uplink component carrier ae, each uplink component carrier other than the primary uplink component carrier, capable of performing an earlier physical random access channel. Transmitting and/or corresponding to one uplink component carrier of a downlink component carrier with better channel conditions; and determining one uplink component carrier randomly from each uplink component carrier except for the primary uplink component carrier in the uplink component carrier a-. Steps S300-S302 are repeated until the request is successful, or until all the remaining 4 uplink component carriers are traversed, the request may not be successful. Then began to reconnect.

As an alternative, if the traversing of the remaining four uplink component carriers still fails to cause the request to succeed, the random access request may be sent through the primary uplink component carrier, and if the request is not successful, the reconnection is started.

If the request is successful, the handset 20 preferably reports to the base station 10 that the SR transmission failure or the UL PCC channel condition is deteriorated, so that the base station 10 reconfigures the uplink component carrier, such as a random access request that will cause the request to be successful. The used uplink component carrier is determined as the new primary uplink component carrier.

As before, another scenario to be discussed is handover, in particular, the handset 20 is switched from being governed by a first management device, such as base station 10, to a second management device such as, for example, base station 11 in FIG. Another base station shown is under the jurisdiction. In the discussion process of LTE-A, the parties have reached a consensus that, advantageously, the management device as the target of the handover needs to indicate the available uplink component carriers to the user terminal performing the handover in the handover command. Another consensus is that the handover command may also include configuration information of the PUCCH, such as which uplink component carrier the PUCCH is on, and the like.

In addition to the plurality of uplink component carriers, the handover command may identify one of the uplink component carriers, for example, indicating which uplink component carrier the PUCCH is on, and the primary uplink component carrier is the one with the PUCCH. For example, the uplink component carrier b. Further, the switching command can also be re-identified with a dedicated access resource (for example, dedicated access) The corresponding uplink component carrier, for example, the uplink component carrier e. According to a specific embodiment of the present invention, the primary uplink component carrier has the highest selected priority order, and the uplink component carrier corresponding to the dedicated access resource has the second highest selected priority order.

Referring to FIG. 4, in step S400, the mobile phone 20 first receives a handover command from the base station 11, which includes information of a plurality of uplink component carriers with physical random access channels, without loss of generality, in this example, the base The number of uplink component carriers configured by the station 11 for the mobile phone 20 is less than that of the base station 10, and is only four, for example, the uplink component carrier be. Those skilled in the art understand that the present invention does not limit the number of component carriers, the total bandwidth, and the bandwidth of each component carrier that can be dominated by each base station. The present invention should be understood to cover various possible scenarios including these examples.

In step S402, the handset 20 will determine an uplink component carrier from the uplink component carrier b-e according to the handover command. Advantageously, if an uplink component carrier with a PUCCH, that is, a primary uplink component carrier, is included, the handset 20 first performs handover on the primary uplink component carrier with the PUCCH, that is, the uplink component carrier is determined in step S402. And in step S404, the handover is performed by the PRACH carried by the uplink component carrier. The primary uplink component carrier, such as the uplink component carrier b and its corresponding downlink component carrier b, are automatically enabled when the handset 20 initially successfully accesses. The other uplink component carriers can be initiated by the base station 20 through CE signaling of the MAC layer.

If the handover performed on the primary uplink component carrier b is unsuccessful, steps S402-S404 are repeatedly performed, and in step S402 of repeated execution, the test is performed. Considering that the handover on the primary uplink component carrier b is unsuccessful, the mobile phone 20 determines whether an uplink component carrier corresponding to the dedicated access resource is also identified in the handover command, and since the uplink component carrier be does have a dedicated access resource Corresponding uplink component carrier e, therefore, in step S402, which is repeatedly performed, the uplink component carrier e is determined, and then the handover is attempted on the uplink component carrier e in step S404.

If the repeatedly performed step S404 fails again, it can be converted to a contention based random access procedure. At this time, after the handover through the uplink component carrier e corresponding to the dedicated access resource is unsuccessful, the handset 20 preferably exchanges an uplink component carrier for the contention-based handover attempt because the previous failure is basically due to Poor channel conditions.

According to an embodiment of the present invention, if the handover command does not identify any one of the primary uplink component carriers, or if the primary uplink component carrier is identified, the handover through the primary uplink component carrier is unsuccessful and the handover command is not associated with the dedicated storage. Taking the uplink component carrier corresponding to the resource, or if the uplink component carrier corresponding to the dedicated access resource is identified, but the handover through the uplink component carrier corresponding to the dedicated access resource is not successful, then repeating Step S402 performed includes any one of the following: determining, from each of the uplink component carriers that are not attempted, that the transmission on the physical random access channel can be performed earlier and/or the downlink component carrier corresponding to a better channel condition One uplink component carrier; one uplink component carrier is randomly determined from each uplink component carrier that is not attempted.

Taking the case where the handover command identifies the primary uplink component carrier as an example, the predetermined condition for terminating the repeated lap may be that all other uplink component carriers except the primary uplink component carrier have been traversed, and the handover has not been successfully performed; the master has been traversed. All other uplink component carriers except the uplink component carrier, and the primary uplink component carrier are tried again, and the handover is still not successful; the number of uplink component carriers that have been tried reaches a predetermined threshold, and the handover is still not successful. For example, in the case where the handover command does not identify the primary uplink component carrier, the predetermined condition for terminating the repeated lap may be that all uplink component carriers have been traversed, and the handover has not been successfully performed; the uplink component carrier that has been tried reaches a predetermined threshold. Failed to switch successfully.

Go to step S402, where the mobile phone 20 performs any one of the following items to determine one uplink component carrier from each uplink component carrier: select, from the plurality of uplink component carriers, other than the primary uplink component carrier. An uplink component carrier corresponding to the dedicated access resource; determining, from the plurality of uplink component carriers, each uplink component carrier other than the primary uplink component carrier, capable of transmitting on the physical random access channel earlier and/or corresponding to one An uplink component carrier of a downlink component carrier with better channel conditions; and an uplink component carrier is randomly determined from each of the plurality of uplink component carriers except the primary uplink component carrier. Without loss of generality, if the handover command notified by the second management device includes a dedicated access resource, an access request is sent on the corresponding uplink component carrier.

If the re-switching is still unsuccessful, steps S402-S404 are repeated until the handover is successful or all other uplink component carriers except the primary uplink component carrier have been traversed. Traversing all other upstream components After the carrier still fails to switch successfully, the reconnection can be directly triggered, or the primary uplink component carrier can be tried again, and the connection is failed again after the handover fails.

If the re-switching is successful, the base station 10 automatically determines the uplink component carrier (another uplink component carrier other than the primary uplink component carrier) that causes the handover to be successful as the new primary uplink component carrier.

After the various embodiments of the method in the user terminal are described in detail, the method for controlling the uplink physical channel carried by the plurality of uplink component carriers configured for one user terminal in the management device is further looked at. As can be summarized from the above description, the method includes the following steps, taking the base station 10 and the mobile phone 20 as an example:

1) determining whether the mobile phone 20 sends a request message message on the physical random access channel carried by another uplink component carrier other than the main uplink component carrier, and the request message message includes random access when the SR fails to transmit. The request and the corresponding message message sent to the second management device when the handover is performed.

2) if the user terminal sends a request message message on the physical random access channel carried by another uplink component carrier other than the primary uplink component carrier and causes the request to succeed, determining the other uplink component carrier as the user terminal Primary uplink component carrier.

In other words, the base station 11 receives a report indicating that the SR transmission failed from the mobile phone 10, reconfigures the UL PCC, or the base station 11 knows that the channel quality of the UL PCC deteriorates according to the measurement of the base station 11 itself, and thus automatically reconfigures the UL PCC. For example, another upstream component carrier is selected for the handset 10 as the new primary uplink component carrier.

For example, in the case that the SR transmission fails, the mobile phone 20 transmits a random access request through the uplink component carrier other than the primary uplink component carrier and successfully reports the SR transmission failure to the base station 10, so that the base station 10 will cause The uplink component carrier that the handset 20 requests for success is determined to be the new primary uplink component carrier. For example, in the handover, if the handover attempt by the primary uplink component carrier is successful, the second management device that is the handover destination automatically determines the uplink component carrier that causes the handover to be successful as the new master. Uplink component carrier.

After the method section is described in detail, the embodiments of the first to fourth devices provided by the embodiments of the present invention are described below with reference to the above, and the related expressions in the above can be referred to for understanding.

Referring to FIG. 5, there is shown a block diagram of a first apparatus for transmitting a random access request on a physical random access channel in a user terminal, wherein the user terminal is configured, in accordance with an embodiment of the present invention. A plurality of uplink component carriers with a physical random access channel, the first device 50 is typically located in the mobile phone 20 shown in FIG. 1, and includes: a first unit 502, configured to determine a condition for determining a random access failure, corresponding to In step S200, the second unit 504 is configured to determine an uplink component carrier from the plurality of uplink component carriers according to the condition for determining the random access failure, corresponding to step S202 shown in FIG. 2; The transmitter 506 is configured to send the random access request to the management device on the entity random channel carried by the determined uplink component carrier, corresponding to step S204 shown in FIG.

Further, the condition for determining the random access failure determined by the first unit 502 includes any one of the following items: I. the plurality of uplink component carriers includes one primary uplink component carrier, if the primary uplink component carrier is used by the primary uplink component carrier. If the random access request sent on the entity random access channel does not cause the request to succeed, the random access failure of the user terminal is determined; II. If any of the plurality of uplink component carriers carry the entity of any uplink component carrier If the random access request sent on the random access channel does not cause the request to succeed, the random access failure of the user terminal is determined; III. If the physical random access of all the uplink component carriers in the multiple uplink component carriers If the random access request sent on the channel does not cause the request to succeed, it is determined that the random access of the user terminal fails.

When the condition for determining the random access failure includes the first item, the second unit 502 is further configured to: send the random access request on the physical random access channel carried by the primary uplink component carrier; or, when multiple uplinks The component carriers respectively have an activated paired downlink component carrier corresponding thereto, and when the condition for determining the random access failure includes the item II, the second unit 502 is configured to perform any one of the following operations: Determining, from the plurality of uplink component carriers, an uplink component carrier corresponding to a downlink component carrier having a better channel condition; randomly determining an uplink component carrier from the plurality of uplink component carriers; or, when the plurality of uplink component carriers are respectively With the activated paired downlink component carrier corresponding thereto, and the condition for determining the random access failure includes the item III, the second unit 502 is configured to perform any one of the following operations: from the Among the uplink component carriers, it is determined that the entity can be carried out earlier. And transmitting on the machine access channel and/or an uplink component carrier corresponding to a downlink component carrier with better channel conditions; and determining an uplink component carrier from the plurality of uplink component carriers.

Further, the second unit 502 and the first transmitter 504 are further configured to: if the random access request sent by the first sender 504 fails to cause the request to succeed, respectively perform the corresponding operations repeatedly until the request is successful or the decision is randomly stored. The condition for failing is satisfied; wherein, when the corresponding operation is repeatedly performed, the second unit 502 is configured to determine, from the uplink component carriers remaining among the plurality of uplink component carriers, that the transmission on the physical random access channel can be performed earlier and/or Or an uplink component carrier corresponding to a downlink component carrier with better channel conditions.

It should be understood that the first unit 502 is not necessary. In a variant, the second unit 504 does not rely on the condition for deciding random access failures to select the appropriate uplink component carrier as described above, either randomly or according to channel conditions.

Referring to FIG. 6, there is shown a second block diagram of a device for transmitting a random access request after a scheduling request transmission failure in a user terminal according to an embodiment of the present invention, wherein the user terminal is configured to include the main device A plurality of uplink component carriers with physical random access channels, such as an uplink component carrier, the second device 60 is typically located in the user terminal 20 of FIG. 1, and includes: a third unit 602 for performing the following Any one of the plurality of uplink component carriers to determine one uplink component carrier, corresponding to step S300 shown in FIG. 3: dividing the plurality of uplink component carriers from the main uplink component carrier Determining, in the uplink component carrier, an uplink component carrier capable of transmitting on the entity random access channel and/or corresponding to a downlink component carrier having a better channel condition; dividing the main uplink component from the plurality of uplink component carriers An uplink component carrier is randomly determined in each uplink component carrier except the carrier; the second transmitter 604 is configured to send the random access request by using the determined physical random access channel carried by the uplink component carrier, corresponding to the figure. Step S302 is shown in 3.

Referring to FIG. 7, there is shown a block diagram of a third device in a user terminal for switching from being governed by a first management device to being governed by a second management device, in accordance with an embodiment of the present invention, The three devices 70 are typically located in the user terminal 20 of FIG. 1, and include a receiver 702 for receiving a handover command sent by a second management device, such as the base station 11, including a plurality of physical random access channels. The related information of the uplink component carrier corresponds to step S400 in FIG.

The fourth unit 704 is configured to determine, according to the handover command, an uplink component carrier from the plurality of uplink component carriers, corresponding to step S402 in FIG.

The fifth unit 706 is configured to perform the handover by using the determined uplink component carrier, corresponding to step S404 shown in FIG.

Wherein, if the handover performed by the fifth unit 706 is not successful, the fourth unit 704 and the fifth unit 706 will repeatedly perform the corresponding operations until the handover is successful or the predetermined condition is met.

Further, the fourth unit 706 is configured to: determine whether the switching command is A primary uplink component carrier is identified in the plurality of uplink component carriers, and if the handover command identifies one primary uplink component carrier in the plurality of uplink component carriers, the primary uplink component carrier is used as the determined uplink component carrier.

When the handover performed by the primary uplink component carrier is not successful, the operation performed by the fourth unit 704 repeatedly includes: determining whether the handover command identifies an uplink component carrier corresponding to the dedicated access resource in the multiple uplink component carriers. And if the handover command identifies an uplink component carrier corresponding to the dedicated access resource in the plurality of uplink component carriers, determining, by using the uplink component corresponding to the dedicated access resource, as the fourth unit 704 Uplink component carrier.

If the handover command does not identify any one of the primary uplink component carriers, or if the primary uplink component carrier is identified, the handover through the primary uplink component carrier is unsuccessful and the handover command does not have an uplink component corresponding to the dedicated access resource. The carrier, or, although the uplink component carrier corresponding to the dedicated access resource is identified, but the handover by the uplink component carrier corresponding to the dedicated access resource is not successful, the fourth unit 704 repeats the operation. Included in any one of the following: determining, from each of the uplink component carriers that are not attempted, an uplink component that can transmit on the physical random access channel earlier and/or corresponds to a better downlink component carrier of one channel condition Carrier; one uplink component carrier is randomly determined from each of the uplink component carriers that are not attempted.

Referring to Figure 8, there is shown a specific embodiment in accordance with the present invention. A fourth device for controlling an uplink physical channel carried by a plurality of uplink component carriers configured for one user terminal in the management device, the fourth device 80 is typically located in the base station 10 shown in FIG. 1, including The determining unit 802 is configured to determine whether the user terminal sends a request message on the physical random access channel carried by another uplink component carrier other than the primary uplink component carrier, and causes the request to succeed; the sixth unit 804 is configured to: When the user terminal sends a request message on the physical random access channel carried by another uplink component carrier other than the primary uplink component carrier and causes the request to succeed, the other uplink component carrier is determined as the primary uplink component carrier of the user terminal.

For a detailed description of the functions of the judging device 802 and the sixth unit 804, reference may be made to the description of the method flow above.

It should be noted that the above-described embodiments are merely exemplary and not limiting of the invention. Any technical solution that does not depart from the spirit of the present invention should fall within the scope of the present invention, including the use of different technical features that appear in different embodiments, and the scheduling methods can be combined to achieve a beneficial effect. In addition, any reference signs in the scope of the claims should not be construed as limiting the scope of the claimed invention; the term "comprising" does not exclude the scope of the other claims or the devices or steps not listed in the specification; A "does not exclude the existence of a plurality of such devices; in a device comprising a plurality of devices, the function of one or more of the plurality of devices can be implemented by the same hardware or software module; "first", The terms "second", "third" and the like are used merely to mean a name and do not denote any particular order.

10‧‧‧Management equipment (base station)

11‧‧‧Management equipment (base station)

20‧‧‧User terminal (mobile phone)

21‧‧‧User terminal (mobile phone)

30‧‧‧Mobility Management Entity/Service Gateway

50‧‧‧ first device

502‧‧‧ first unit

504‧‧‧Second unit

506‧‧‧ first transmitter

60‧‧‧second device

602‧‧‧ third unit

604‧‧‧Second transmitter

70‧‧‧ third device

702‧‧‧ Receiver

704‧‧‧Fourth unit

706‧‧‧Unit 5

80‧‧‧ fourth device

802‧‧‧ judgment device

804‧‧‧Unit 6

Other features, objects, and advantages of the present invention will become apparent from the Detailed Description of Description

1 is a typical application scenario according to the present invention; FIG. 2 is a flowchart of a method for transmitting a random access request on a physical random access channel in a user terminal according to an embodiment of the present invention; A flowchart of a method for transmitting a random access request after a scheduling request failure in a user terminal in accordance with an embodiment of the present invention; FIG. 4 is a diagram for use in a user terminal according to an embodiment of the present invention A method for managing the jurisdiction of a management device to switch to a method governed by a second management device; FIG. 5 is a diagram for transmitting a random access request on a physical random access channel in a user terminal in accordance with an embodiment of the present invention; a first device block diagram; FIG. 6 is a block diagram of a second device for transmitting a random access request after a schedule request failure schedule request transmission failure in a user terminal according to an embodiment of the present invention; FIG. 7 is a user A third device block diagram for switching from being governed by a first management device to a third device under the jurisdiction; FIG. 8 is a diagram in accordance with the present invention Body of a fourth embodiment of a block diagram of apparatus for controlling the uplink physical channel configuration for a user terminal carried by a plurality of component carriers in the uplink management device.

Wherein, the same or similar reference numerals indicate the same or similar features.

Claims (15)

A method for transmitting a random access request on a physical random access channel in a user terminal, wherein the user terminal is configured with a plurality of uplink component carriers with a physical random access channel, the method comprising the following steps: Determining one uplink component carrier among the plurality of uplink component carriers, the step b comprising: performing one of the following operations: randomly determining an uplink component carrier from the plurality of uplink component carriers; Determining, in the uplink component carrier, an uplink component carrier of the paired downlink component carrier with the channel condition being better activated; determining, from the plurality of uplink component carriers, an uplink component carrier capable of performing transmission on the entity random access channel earlier; Determining an uplink component carrier as a primary uplink component carrier; c. transmitting the random access request to the management device on the determined physical random channel carried by the uplink component carrier. The method of claim 1, wherein before the step b, the method further comprises: a. determining a condition for determining a random access failure; wherein the step b includes performing a condition that the random access fails with the decision a matching operation; wherein the condition for determining the random access failure includes any one of the following: I. including one primary uplink component in the plurality of uplink component carriers Wave, if the random access request sent on the physical random access channel carried by the primary uplink component carrier does not cause the request to succeed, determining that the random access of the user terminal fails; II. if the multiple uplink component carriers are If the random access request sent on the physical random access channel carried by any of the uplink component carriers does not cause the request to succeed, determining that the random access of the user terminal fails; III. if all of the multiple uplink component carriers If the random access request sent on the physical random access channel carried by the uplink component carrier does not cause the request to be successful, the random access failure of the user terminal is determined; IV. If all of the multiple uplink component carriers have a start If the random access request sent on the physical random access channel carried by the uplink component carrier of the paired downlink component carrier does not cause the request to succeed, it is determined that the random access of the user terminal fails. Wherein, when the condition for determining the random access failure includes the first item, the step b includes determining an uplink component carrier as the primary uplink component carrier; or, when the condition for determining the random access failure includes the item II The step b includes performing any one of the following operations: determining, from the plurality of uplink component carriers, an uplink component carrier having a paired downlink component carrier with a better channel condition; and the uplink component from the plurality of uplink components Randomly determining an uplink component carrier in the carrier; or, When the condition for the decision random access failure includes the item III, the step b includes performing any one of the following operations: determining from the plurality of uplink component carriers that the entity random access channel can be performed earlier Transmitting and/or an uplink component carrier of the paired downlink component carrier with the channel conditionally preferred start; randomly determining an uplink component carrier from the plurality of uplink component carriers; or, when the decision fails the random access condition Including the item IV, the step b includes: determining, from the uplink component carriers of the plurality of uplink component carriers, the uplink component carriers having the activated paired downlink component carrier, an uplink of the paired downlink component carrier with the channel condition better starting Component carrier. The method of claim 2, wherein the method further comprises the step of: if the condition for the decision access failure includes the third or fourth item, if the random access is sent in the step c If the request fails to cause the request to succeed, the step bc is repeated until the request is successful or the condition for the random access failure is satisfied; wherein, when the condition for the decision access failure includes the item III, the step b is repeated The method includes performing any one of the following: determining, from among the remaining uplink component carriers, that the transmission on the physical random access channel can be performed earlier and/or the paired downlink component carrier corresponding to the activation of a channel condition is better. An uplink component carrier; Determining, from the remaining uplink component carriers of the plurality of uplink component carriers, an uplink component carrier; wherein, when the condition for determining the access failure includes the item IV, the step b of repeatedly performing includes: An uplink component carrier having a paired downlink component carrier with a better channel condition is determined from an uplink component carrier having an activated paired downlink component carrier. A method for transmitting a random access request after a scheduling request transmission failure in a user terminal, wherein the user terminal is configured with a plurality of uplink component carriers with a physical random access channel, the method comprising the following steps: A. Determining one uplink component carrier from the plurality of uplink component carriers, the step A includes: performing any one of: determining, from the plurality of uplink component carriers, each uplink component carrier except the primary uplink component carrier Transmitting an entity on a physical random access channel and/or an uplink component carrier corresponding to a downlink component carrier with better channel conditions; and dividing each uplink component carrier from the plurality of uplink component carriers Randomly determining an uplink component carrier; B. transmitting the random access request through the determined physical random access channel carried by the uplink component carrier. The method of claim 4, further comprising the step of: when the random access request sent in the step B does not cause the request to succeed Repeating step AB until the request succeeds or has traversed all uplink component carriers except the primary uplink component carrier of the plurality of uplink component carriers; wherein, if the user terminal transmits the one other than the primary uplink component carrier If the random access request sent by the uplink component carrier causes the request to be successful, the scheduling request transmission failure is reported to the management device. A method for switching from being governed by a first management device to being governed by a second management device in a user terminal, comprising the steps of: receiving a handover command sent by the second management device, where the plurality of Correlation information of an uplink component carrier with a physical random access channel; m. determining an uplink component carrier from the plurality of uplink component carriers according to the handover command; n. performing the handover by using the determined uplink component carrier; If the switching performed in the step n is not successful, the step mn is repeatedly executed until the switching is successful or the predetermined condition is satisfied. The method of claim 6, wherein the step m comprises: determining whether the handover command identifies one primary uplink component carrier in the plurality of uplink component carriers; if the handover command is in the multiple uplink components If a primary uplink component carrier is identified in the carrier, the primary uplink component carrier is used as the uplink component carrier determined in step m; when the handover performed through the primary uplink component carrier is unsuccessful, the repetition is repeated. The step m of performing includes: determining whether the handover command identifies an uplink component carrier corresponding to the dedicated access resource in the plurality of uplink component carriers; if the handover command identifies one of the plurality of uplink component carriers If the uplink component carrier corresponding to the dedicated access resource is used, the uplink component corresponding to the dedicated access resource is used as the uplink component carrier determined in step m; wherein, if the handover command does not identify any one of the primary uplink component carriers, Or, although the primary uplink component carrier is identified, the handover through the primary uplink component carrier is unsuccessful and the handover command does not have an uplink component carrier corresponding to the dedicated access resource, or although the identifier corresponding to the dedicated access resource is identified The uplink component carrier, but the handover through the uplink component carrier corresponding to the dedicated access resource is also unsuccessful, and the step m of repeatedly performing includes any one of the following: each uplink component that has never been tried Determining in the carrier that the transmission on the physical random access channel can be performed earlier and/or corresponding to one One uplink component carrier of a downlink component carrier with better channel conditions; one uplink component carrier is randomly determined from each uplink component carrier that is not attempted. A method for controlling an uplink physical channel carried by a plurality of uplink component carriers configured for a user terminal in a management device, comprising the steps of: determining whether the user terminal is another uplink component other than the primary uplink component carrier Sending a request message on the physical random access channel carried by the carrier and guiding The request is successful; if the user terminal sends a request message on the physical random access channel carried by another uplink component carrier other than the primary uplink component carrier and causes the request to succeed, the other uplink component is determined as the user terminal. Primary uplink component carrier. A first device for transmitting a random access request on a physical random access channel in a user terminal, wherein the user terminal is configured with a plurality of uplink component carriers with a physical random access channel, the first device The second unit is configured to: perform one of the following operations, and determine an uplink component carrier in the multiple uplink component carriers: randomly determine an uplink component carrier from the multiple uplink component carriers; Determining, from the plurality of uplink component carriers, one uplink component carrier of the paired downlink component carrier with the channel condition better start; determining, from the plurality of uplink component carriers, an uplink component capable of transmitting on the entity random access channel earlier a carrier; determining an uplink component carrier as a primary uplink component carrier; and a first transmitter, configured to send the random access request to the management device on an entity random channel carried by the uplink component carrier determined by the second unit. The first device according to claim 9 , further comprising: a first unit, configured to determine a condition for determining a random access failure; The second unit is further configured to perform an operation that matches a condition for determining a random access failure determined by the first unit, and determine an uplink component carrier from the plurality of uplink component carriers; wherein the determining random access The failure condition includes any one of the following items: I. The plurality of uplink component carriers include one primary uplink component carrier, if random access is sent on the physical random access channel carried by the primary uplink component carrier If the request does not cause the request to succeed, it is determined that the random access of the user terminal fails; II. if the random access request sent on the physical random access channel carried by any of the plurality of uplink component carriers does not cause If the request is successful, the random access failure of the user terminal is determined; III. If the random access request sent on the physical random access channel carried by all the uplink component carriers in the multiple uplink component carriers does not cause the request to succeed Determining that the random access of the user terminal fails; IV. if all of the plurality of uplink component carriers have a paired downlink component carrier that is activated Uplink component carrier carried by the entity sending random access requests on the random access channels have not led to the request succeeds, the user terminal determines that the random access failure. Wherein, when the condition for determining the random access failure includes the first item, the second unit is configured to determine an uplink component carrier as the primary uplink component carrier; or, when the condition for determining the random access failure includes the first In case of item II, the first The second unit is configured to perform any one of the following operations: determining, from the plurality of uplink component carriers, one uplink component carrier of the paired downlink component carrier with the channel condition better starting; from the plurality of uplink component carriers Determining an uplink component carrier randomly; or, when the condition for determining the random access failure includes the item III, the second unit is configured to perform any one of the following operations: from the plurality of uplink component carriers Determining, in an earlier manner, an uplink component carrier capable of transmitting on the entity random access channel and/or a paired downlink component carrier having a channel condition better start; randomly determining an uplink component carrier from the plurality of uplink component carriers Or, when the condition for the random access failure of the decision includes the item IV, the second unit is configured to: determine, from all uplink component carriers of the plurality of uplink component carriers that have the activated paired downlink component carrier An uplink component carrier of the paired downlink component carrier that is activated by the channel condition. The first device according to claim 10, wherein the second unit and the first transmitter are further configured to: if the random access request sent by the first sender fails to cause the request to succeed, The corresponding operations are repeatedly performed until the request is successful or the condition for the random access failure is satisfied; wherein, when the corresponding operation is repeatedly performed, the second unit is configured to perform any of the following: Determining, from the remaining uplink component carriers of the plurality of uplink component carriers, an uplink component carrier capable of transmitting on the entity random access channel earlier and/or corresponding to a downlink component carrier having better channel conditions; One uplink component carrier is randomly determined among the remaining uplink component carriers among the uplink component carriers. A second device for transmitting a random access request after a scheduling request transmission failure in a user terminal, wherein the user terminal is configured with multiple uplinks with a physical random access channel including the primary uplink component carrier a component carrier, the second device comprising: a third unit, configured to perform any one of: determining an uplink component carrier from the plurality of uplink component carriers: dividing the master from the plurality of uplink component carriers Determining, in each of the uplink component carriers other than the uplink component carrier, an uplink component carrier capable of transmitting on the entity random access channel and/or corresponding to a downlink component carrier having better channel conditions; from the plurality of uplink component carriers Determining, randomly, one uplink component carrier in each uplink component carrier except the primary uplink component carrier; and transmitting, by the second transmitter, the random access channel through the entity random access channel carried by the determined uplink component carrier request. A third device in a user terminal for switching from being governed by a first management device to a third management device, comprising: a receiver, configured to receive a handover command sent by the second management device, where Correlation information including multiple uplink component carriers with physical random access channels; a fourth unit, configured to determine, according to the handover command, an uplink component carrier from the plurality of uplink component carriers, and a fifth unit, configured to perform the handover by using the determined uplink component carrier; wherein, if the fifth The switching performed by the unit is unsuccessful, and the fourth and fifth units will repeatedly perform the corresponding operations until the switching is successful or the predetermined condition is met. The third device according to claim 13 , wherein the fourth unit is configured to: determine whether the handover command identifies a primary uplink component carrier in the plurality of uplink component carriers, if the handover command is in the If one of the plurality of uplink component carriers identifies one primary uplink component carrier, the primary uplink component carrier is used as the uplink component carrier determined by the fourth unit; when the handover performed by the primary uplink component carrier is not successful, the fourth unit The repeatedly performing operation includes: determining whether the handover command identifies an uplink component carrier corresponding to the dedicated access resource in the plurality of uplink component carriers, and if the handover command identifies one of the plurality of uplink component carriers And an uplink component carrier corresponding to the dedicated access resource, the uplink component carrier corresponding to the dedicated access resource is used as the uplink component carrier determined by the fourth unit; wherein, if the handover command does not identify any one of the primary uplink components Carrier, or although the primary uplink component carrier is identified but transmitted through the primary uplink component carrier Switching of the row without success and the handover command does not have access to the private The uplink component carrier corresponding to the resource, or although the uplink component carrier corresponding to the dedicated access resource is identified, but the handover by the uplink component carrier corresponding to the dedicated access resource is not successful, then the The four-cell repeated operation includes any one of the following: determining from each of the uplink component carriers that are not attempted that the transmission on the physical random access channel can be performed earlier and/or the downlink corresponding to the better condition of one channel. One uplink component carrier of the component carrier; one uplink component carrier is randomly determined from each of the uplink component carriers that are not attempted. A fourth device, in a management device, for controlling an uplink physical channel carried by a plurality of uplink component carriers configured for a user terminal, comprising: determining means, configured to determine whether the user terminal is outside a primary uplink component carrier Sending a request message on the physical random access channel carried by another uplink component carrier and causing the request to succeed; and a sixth unit, for the entity carried by another uplink component carrier other than the primary uplink component carrier When the request message is sent on the random access channel and the request is successful, the other uplink component carrier is determined as the primary uplink component carrier of the user terminal.