WO2010124503A1

WO2010124503A1 - Multi-carrier management method

Info

Publication number: WO2010124503A1
Application number: PCT/CN2009/075936
Authority: WO
Inventors: 陈玉芹; 李楠; 曲红云
Original assignee: 中兴通讯股份有限公司
Priority date: 2009-04-28
Filing date: 2009-12-24
Publication date: 2010-11-04
Also published as: CN101772087B; CN101772087A

Abstract

A multi-carrier management method is provided, and the method includes: a base station allocating subcarriers for a mobile station when the predetermined condition is satisfied; wherein the predetermined condition includes at least one of the following: a mobile station requesting bandwidth or subcarriers from a base station, the channel quality of the carrier on which the mobile station is currently working being smaller than predetermined threshold, the subcarrier allocation policy during the traffic stream setup process, the quality of service requirement of traffic stream, the base station having downlink data to be sent to the mobile station, new service setup, the load balance policy of the base station. Through the present invention, when subcarrier and maincarrier are the frequency bands which are not adjacent and the center frequency deviation of the two frequency bands is lager than threshold value, the operations of maincarrier handover, subcarrier allocation, subcarrier handover, subcarrier releasing and so forth are implemented.

Description

Multi-carrier management method

The present invention relates to the field of communications, and in particular to a multi-carrier management method, including a method for allocating, updating, and releasing multi-carriers. Background technique

In order to improve the data transmission rate of a wireless communication system, a multi-carrier technique is proposed. Under the protocol architecture of multi-carrier wireless communication system, unified media access control entity (Media Access

Control, MAC) controls the physical layer (PHY) including multiple channels (channel 1, channel 2 channel N). Each channel may have a different bandwidth, and the bandwidth here may be a continuous or discontinuous frequency band.

In a multi-carrier wireless communication system, for a base station, carriers can be divided into a fully configured carrier and a partially configured carrier. The fully configured carrier refers to a carrier configured with all control channels, and the foregoing control channels include a synchronization channel, a broadcast channel, a multicast channel, and a unicast channel, and also include channels related to information and parameters of multi-carrier operation and other carriers. . A partially configured carrier refers to a carrier that is configured only for the basic control channel used to support service interaction in multi-carrier operation.

On the other hand, in a multi-carrier wireless communication system, for a terminal, a carrier can be divided into a primary carrier and a secondary carrier. The primary carrier is a carrier used for communication services and all PHY/MAC control information between a base station (Base Station, BS) and a mobile station (MS). In addition, the primary carrier is also used to control the operation of the MS. For example, network access. In a cell, the MS has only one primary carrier, and the carrier after the MS network access is its primary carrier. The secondary carrier is an additional carrier for the transmission of traffic allocated to the MS by BS-specific commands and rules. Some control signaling supporting multi-carrier operation can also be sent on the secondary carrier. Within a cell, the MS may have one or more secondary carriers or no secondary carriers. The MS can obtain the part of the secondary carrier through the primary carrier. Information, for example, whether there are secondary carriers, location and configuration information of secondary carriers, and so on. Considering the use of primary and secondary carriers, the primary carrier must be a fully configured carrier, and the secondary carrier can be a fully configured carrier or a partially configured carrier, depending on the application and configuration model used for the particular application.

Currently, there are three possible ways to use the secondary carrier in combination with the primary carrier: Mode 1: The secondary carrier and the primary carrier are adjacent frequency bands. In this mode, the MS uses the same time synchronization and frequency synchronization as the primary carrier. And the power information is kept in contact with the secondary carrier.

Manner 2: The secondary carrier and the primary carrier are non-adjacent frequency bands, and the center frequency deviation of the two frequency bands is less than the threshold Af. In this manner, the MS can still use the same time synchronization, frequency synchronization, and primary carrier as the primary carrier. The power information is kept in contact with the secondary carrier.

Manner 3: The secondary carrier and the primary carrier are non-adjacent bands, and the center frequency deviation of the two bands is greater than the threshold A f. In this mode, the MS needs to perform time and frequency synchronization and power adjustment on the secondary carrier.

It can be seen that, in the foregoing manners 1 and 2, the MS does not need to be synchronized with the secondary carrier. When the secondary carrier is used between the BS and the MS, the indication may be performed through message interaction, or the indication information may be directly sent on the primary carrier. For the MS, the indication information may be information indicating a resource allocation channel for resource allocation to the MS on the secondary carrier, or may be resource allocation information for resource allocation for the secondary carrier.

In a multi-carrier wireless communication system, multi-carrier management includes a process of switching of a primary carrier, allocation of a secondary carrier, handover, and release; and there is no effective solution for how to manage multiple carriers in the above various modes. Summary of the invention

The present invention has been made in view of the problems in the related art that there is currently no solution to how to manage multi-carriers in the above various manners. To this end, the present invention aims to provide a multi-carrier management method to fill the current This technology is blank.

In order to achieve the above object, according to an aspect of the present invention, a multi-carrier management is provided Method. In the method, the base station allocates a secondary carrier to the mobile station when the predetermined condition is satisfied.

Preferably, the predetermined condition includes at least one of the following: the mobile station requests the base station for the bandwidth or the secondary carrier, the channel quality of the current working carrier of the mobile station is less than a predetermined threshold, the secondary carrier allocation policy in the service flow establishment process, and the service quality of the service flow. Requirements, the downlink data to be sent by the base station to the mobile station, the establishment of a new service, and the load balancing policy of the base station.

Preferably, the base station allocates the secondary carrier to the mobile station, the base station sends a carrier management message for the secondary carrier allocation to the mobile station, where the management message for the secondary carrier allocation includes at least one of the following: Secondary carrier center frequency information. Preferably, the base station receives a bandwidth request message from the mobile station or a carrier management request message for the secondary carrier allocation request before the base station transmits the carrier management message for the secondary carrier allocation to the mobile station. Preferably, after the base station transmits the secondary carrier allocation message to the mobile station, if the acknowledgment message or the acknowledgment header from the mobile station is not received within the predetermined time, the base station retransmits the carrier management message for the secondary carrier allocation.

Preferably, the base station assigning the secondary carrier to the mobile station comprises: the base station instructing the mobile station to perform channel estimation on the target carrier to be allocated, and allocating the secondary carrier according to the channel estimation result reported by the mobile station.

Preferably, the foregoing secondary carrier and the primary carrier are two frequency bands that are not adjacent, and the center frequency deviation of the two frequency bands is greater than a predetermined threshold, wherein the mobile station synchronizes with the base station on the allocated secondary carrier.

Preferably, the synchronization of the mobile station with the base station on the allocated secondary carrier comprises: before the data interaction with the base station, the mobile station synchronizes with the base station on the allocated secondary carrier by using an initial ranging procedure. In the initial ranging process, at least one of the following operations is included: the base station allocates a ranging code and a measurement to the secondary carrier allocated by the mobile station by using a primary carrier or a secondary carrier other than the secondary carrier allocated to the mobile station. The mobile station performs uplink transmission according to the transmit power of the primary carrier. Preferably, the mobile station synchronizes with the base station on the allocated secondary carrier, including: during the data interaction with the base station, the mobile station passes the uplink periodic ranging process. Allocated subcarriers and bases The station is synchronized.

Preferably, in the above method, after the secondary carrier is allocated, when the predetermined update condition is satisfied, the base station performs a secondary carrier update operation with the mobile station. Preferably, the predetermined update condition includes at least one of the following: the mobile station and the base station lose synchronization on the allocated secondary carrier, the network load of the base station changes, and the channel condition on the secondary carrier between the base station and the mobile station changes.

Preferably, the base station and the mobile station perform a secondary carrier update operation by using a message exchange, where the message interaction includes: the base station sends a carrier management message for the secondary carrier update to the mobile station, indicating that the secondary carrier is updated. After transmitting the secondary carrier update message, the mobile station can return a secondary carrier update reject message to the base station. Preferably, the secondary carrier update reject message may carry time information; wherein the time information is used to indicate a time when the base station can retransmit the carrier management message for the secondary carrier update.

Preferably, after transmitting the secondary carrier update message, the method further includes: if the acknowledgment message, the acknowledgment header or the reject message from the mobile station is not received within the predetermined time, the base station repeatedly transmits the carrier management message for the secondary carrier update.

Preferably, the base station and the mobile station perform a secondary carrier update operation by using a message exchange, where the message interaction includes: the base station receives a secondary carrier management request message sent by the mobile station for requesting the secondary carrier update. After receiving the carrier management request message for the secondary carrier update request, the method further includes: the base station returns a carrier management message for the secondary carrier update to the mobile station; or the base station returns a secondary carrier update reject message to the mobile station. Preferably, the secondary carrier update reject message carries time information, where the time information is used to indicate the time when the mobile station retransmits the carrier management request message for the secondary carrier update request, or is used to indicate that the base station retransmits the secondary carrier. The time of the updated carrier management message.

Preferably, the foregoing carrier management message for the secondary carrier update includes at least one of the following: index information and/or center frequency information of the allocated secondary carrier, index information and/or center frequency information of the updated target secondary carrier. . Preferably, the foregoing secondary carrier update operation includes: the mobile station synchronizes with the base station on the target secondary carrier, and then disconnects the data interaction with the allocated secondary carrier; or the mobile station disconnects the data interaction with the allocated secondary carrier. Then, synchronization with the base station is performed on the target secondary carrier.

Preferably, before performing the secondary carrier update operation, the base station instructs the mobile station to perform channel estimation on the target carrier to be allocated, and allocates the target secondary carrier according to the channel estimation result reported by the mobile station.

In order to achieve the above object, according to another aspect of the present invention, a secondary carrier management method is provided, wherein, in a case where a predetermined condition is satisfied, a base station and a mobile station perform a secondary carrier release operation; wherein, the predetermined condition includes at least the following 1: The mobile station and the base station lose synchronization on the allocated secondary carrier, the duration of no data interaction on the allocated secondary carrier exceeds the predetermined time, the load of other carriers changes, the capability of the mobile station to support multiple carriers is turned off, and the secondary carrier is disabled. The scheduled usage time has expired, and the service flow of the mobile station on the secondary carrier is completely deleted.

Preferably, the base station and the mobile station perform a secondary carrier release operation by using a message exchange, where the message interaction includes: the base station sends a carrier management message for the secondary carrier release to the mobile station, and is used to indicate that the secondary carrier release operation is performed. After transmitting the secondary carrier release message, the base station may receive the secondary carrier release reject message returned by the mobile station. Preferably, the secondary carrier release reject message carries time information, where the time information is used to indicate the time when the base station and the mobile station can perform the resource release operation again.

Preferably, after transmitting the carrier management message for performing the secondary carrier release, if the acknowledgment message, the acknowledgment header or the refusal message from the mobile station is not received within the predetermined time, the base station repeatedly transmits the carrier management for performing the secondary carrier release. Message.

Preferably, the base station and the mobile station perform a secondary carrier release operation by using a message exchange, where the message interaction includes: the base station receives a carrier management request message sent by the mobile station for requesting the release of the secondary carrier, and the base station returns the secondary carrier release rejection to the mobile station. Message or carrier management message for secondary carrier release. Preferably, the secondary carrier release reject message carries time information, where the time information is used to indicate the time when the base station and the mobile station perform the resource release operation again. Preferably, the carrier management message used for the secondary carrier release includes at least one of the following: secondary carrier index number information, and secondary carrier center frequency information.

Preferably, the releasing operation comprises: the mobile station deleting the locally stored information related to the secondary carrier; and the base station deleting the locally stored information related to the mobile station on the secondary carrier.

Preferably, the secondary carrier and the primary carrier are two frequency bands that are not adjacent, and the center frequency deviation of the two frequency bands is greater than a predetermined threshold.

In order to achieve the above object, according to another aspect of the present invention, a multi-carrier management method is provided. In this method, when a predetermined condition is satisfied, a handover operation of a primary carrier is performed between a base station and a mobile station.

Preferably, the predetermined handover condition comprises at least one of the following: the mobile station and the base station lose synchronization on the allocated primary carrier, the network load of the base station changes, and the channel condition on the primary carrier between the base station and the mobile station changes.

Preferably, the base station and the mobile station perform a primary carrier switching operation by using a message exchange, where the message interaction includes: the base station sends a carrier management message for the primary carrier handover to the mobile station, to indicate that the primary carrier handover is performed. Preferably, after transmitting the carrier management message for the primary carrier handover, the mobile station can return a primary carrier handover reject message to the base station. The primary carrier handover reject message preferably carries time information, which is used to indicate the time at which the base station can retransmit the carrier management message for the primary carrier update.

Preferably, after transmitting the carrier management message for the primary carrier handover, the method further includes: if the acknowledgment message, the acknowledgment header or the refusal message from the mobile station is not received within the predetermined time, the base station repeats the transmission for the primary carrier switching Carrier management message.

Preferably, the base station and the mobile station perform a primary carrier switching operation by using a message exchange, where the message interaction includes: the mobile station sends a carrier management request message for the primary carrier handover request to the base station. After the carrier management request message for the primary carrier switching request is sent, the method further includes: the base station returns a carrier management message for the primary carrier handover to the mobile station; or The base station returns a primary carrier handover reject message to the mobile station. Preferably, the primary carrier handover reject message carries time information, where the time information is used to indicate the time when the mobile station retransmits the carrier management request message for the primary carrier handover request, or is used to indicate that the base station retransmits the primary carrier. The time of the switched carrier management message.

Preferably, the foregoing carrier management message for primary carrier switching includes at least one of the following: index information and/or center frequency information of the target primary carrier to which the handover is performed.

Preferably, the foregoing primary carrier update operation comprises: the mobile station performs synchronization with the base station on the target primary carrier, and then disconnects data interaction with the allocated primary carrier; or the mobile station disconnects data interaction with the allocated primary carrier. Then, synchronization with the base station is performed on the target primary carrier; or, the mobile station does not need to perform synchronization with the base station on the target primary carrier, and performs data interaction with the base station directly on the target primary carrier.

Preferably, before performing the primary carrier switching operation, the base station instructs the mobile station to perform channel estimation on the target carrier to be allocated, and allocates the target primary carrier according to the channel estimation result reported by the mobile station.

According to the present invention, in the above manner 3, that is, when the secondary carrier and the primary carrier are not adjacent to the frequency band, and the center frequency deviation of the two frequency bands is greater than the threshold Af, how to manage the secondary carrier is given. The implementation of the primary carrier switching, the secondary carrier allocation, the secondary carrier switching, and the secondary carrier release may be implemented by using the foregoing at least one technical solution provided by the present invention. DRAWINGS

1a and 1b are schematic diagrams of a secondary carrier allocation operation according to an embodiment of the present invention; FIGS. 2a and 2b are schematic diagrams of a secondary carrier update operation according to an embodiment of the present invention; and FIGS. 3a and 3b are diagrams according to an embodiment of the present invention; Schematic diagram of a secondary carrier release operation; FIG. 4a and FIG. 4b are schematic diagrams of a primary carrier update operation according to an embodiment of the present invention; FIG. 5 is a schematic structural diagram of a acknowledgment header according to an embodiment of the present invention. detailed description

As described above, in the various modes of using the secondary carrier and the primary carrier in the foregoing, how to manage the multiple carriers, a specific solution has not been given yet, and the present invention proposes to fill the The technology is vacant, so that the effective management of the multi-carrier is implemented. The multi-carrier management method can be applied not only to the usage scenarios of the primary carrier and the secondary carrier provided in the background, but also in other scenarios.

The multi-carrier management involved in the embodiments of the present invention includes, but is not limited to, handover of a primary carrier, allocation of a secondary carrier, maintenance of a secondary carrier, update of a secondary carrier, release of a secondary carrier, and the like. The following will be described separately. The technical features in the embodiments and the embodiments of the present application may be combined with each other without conflict. In the following description, the secondary carrier allocation message, the secondary carrier update message, the secondary carrier release message, and the primary carrier handover message may be collectively referred to as a carrier management message, and used by the base station to perform secondary carrier allocation, secondary carrier update, and secondary carrier release, respectively. The primary carrier allocation request message, the secondary carrier update request message, the secondary carrier release request message, and the primary carrier handover request message may be collectively referred to as a carrier management request message, respectively, for the mobile station to request the base station to perform secondary carrier allocation. , secondary carrier update, secondary carrier release, primary carrier switching operation.

Subcarrier allocation

The base station (BS) allocates a secondary carrier to the mobile station (MS) when the predetermined condition is met. In order to facilitate the understanding of the present invention, several exemplary predetermined conditions are given below. Of course, the predetermined conditions of the embodiments of the present invention may include, but are not limited to, the following: (1) When a mobile station requests a bandwidth or a secondary carrier from a base station; 2) When the channel quality of the current working carrier of the mobile station is less than a predetermined threshold, when the channel quality is less than a predetermined threshold, in order to satisfy the reliability transmission of the data, the data transmission rate on the carrier may be reduced, and in order to ensure the data transmission rate requirement, The BS may allocate a new secondary carrier to the mobile station; (3) when the secondary carrier allocation policy in the service flow establishment process requires allocation, for example, in the process of establishing the service flow initiated by the BS, if a large amount of data is sent to the mobile station later in the BS , then a new secondary carrier may be allocated to the MS after the initiation of the initiation of the service flow; (4) to satisfy the service flow When the QoS (Quality of Service) is required, the QoS (Quality of Service) is required to be sent to the MS. In this case, if the downlink available bandwidth of the current carrier is insufficient, the BS may allocate a new secondary carrier to the MS. (6) It is necessary to establish a new service (for example, multicast broadcast service); at this time, the BS may use a dedicated secondary carrier to establish a multicast broadcast service for the MS; (7) when the load balancing policy of the BS requires allocation, for example, if If the primary carrier of the BS is overloaded, the BS may choose to transmit part of the data on the secondary carrier to allocate a new secondary carrier to the MS.

In addition, the secondary carrier allocated by the base station may be a partially configured carrier on the BS, or may be a fully configured carrier other than the serving subcarrier.

It can be seen that when the condition (1) or (2) is satisfied, it can be considered as a secondary carrier allocation operation initiated by the MS, satisfying the conditions (2), (3), (4), (5;), (six) Or (7), it can be considered as a secondary carrier allocation operation initiated by the BS. The description is separately made below.

1. MS-initiated secondary carrier allocation

When the MS initiates a bandwidth or secondary carrier application to the BS, the BS may allocate one or more secondary carriers to the MS for data/service interaction. Specifically, the MS may send a secondary carrier allocation request message or a bandwidth request message to the BS; after receiving the request from the MS, preferably, the BS may confirm the request message, or the BS may directly report to the MS without confirmation. Sending a secondary carrier allocation message, and allocating a secondary carrier to the MS. Preferably, after receiving the secondary carrier allocation message, the MS may confirm to the BS. If the BS does not receive the confirmation or rejection of the MS within the preset time, the BS may The secondary carrier allocation message is resent until an acknowledgment or rejection of the MS is received, or until the number of times the secondary carrier allocation message is resent reaches a preset number of thresholds.

For the MS-initiated secondary carrier allocation process, as shown in FIG. 1a, an implementation process may include the following information interaction process: The MS sends a secondary carrier allocation request message to the BS for requesting the secondary carrier. The BS sends a secondary carrier allocation message to the MS to indicate the secondary carrier allocation. The MS sends a secondary carrier allocation acknowledgement message to the BS for confirming the secondary carrier allocation. Then, the BS and the MS perform data interaction. Second, the secondary carrier allocation initiated by the BS

When the secondary carrier allocation is initiated by the BS, the BS may send a secondary carrier allocation message to the MS to allocate the secondary carrier to the MS. The subsequent process is similar to the foregoing description. Preferably, after receiving the secondary carrier allocation message, the MS may send the BS to the BS. Confirming, if the BS does not receive the acknowledgment or rejection of the MS within the preset time, the BS may resend the secondary carrier allocation message until the acknowledgment or rejection of the MS is received, or until the number of times the secondary carrier allocation message is resent is reached The preset number of thresholds.

For the secondary carrier allocation process initiated by the BS, it can be understood by referring to FIG. 1b. As shown in FIG. 1B, an implementation process may generally include the following information interaction process: The BS sends a secondary carrier allocation message to the MS, which is used to indicate the secondary carrier allocation. The MS sends a secondary carrier allocation acknowledgement message or an acknowledgement header to the BS for confirming the secondary carrier allocation, and then the BS and the MS perform data interaction.

It should be noted that, in the above processing, whether the secondary carrier allocation initiated by the BS or the secondary carrier allocation initiated by the MS, the opposite end can perform an accept or reject operation, for example, for the secondary carrier allocation initiated by the MS, if the BS If the secondary carrier is refused to be allocated, the secondary carrier allocation reject message may be sent. Preferably, the MS may also be notified of the time or timing at which the secondary carrier can be allocated.

In the foregoing secondary carrier allocation message, the index information of the allocated secondary carrier, the center frequency information of the secondary carrier, and the like may be carried. For the above message interaction, it can be performed on the primary carrier or the already allocated secondary carrier.

Preferably, in order to allocate the secondary carrier as reasonably as possible, before performing the secondary carrier allocation, that is, before transmitting the secondary carrier allocation message, the BS may request the MS to perform channel estimation on the multiple target carriers to be allocated, and according to The channel estimation result reported by the MS is used for secondary carrier allocation.

Maintenance of secondary carrier

When the secondary carrier and the primary carrier are not adjacent to the frequency band, and the center frequency deviation of the two frequency bands is greater than the gate When the limit A f , that is, in the above mode 3, the MS needs to perform time and frequency synchronization and power adjustment on the secondary carrier, and in the above mode 2, that is, when the center frequency deviation is smaller than the threshold A f When the MS can adjust the secondary carrier by the synchronization information of the primary carrier, synchronization is not required. It should be noted that the selection or setting of the threshold A f may be different as the development of the technology or the application environment changes, but this does not affect the essence of the present invention, and details are not described herein again.

Specifically, after the BS allocates the secondary carrier to the MS, the MS may synchronize with the BS on the allocated secondary carrier of the mobile station. There are at least two ways to synchronize:

1. The synchronization between the MS and the BS before the data interaction, the synchronization process can be understood as the initial synchronization

The synchronization here may specifically include downlink synchronization and initial ranging synchronization. For downlink synchronization, it may be implemented by transmitting a downlink signal. For initial ranging synchronization, the MS passes the initial ranging procedure before the data interaction with the BS. The carrier is synchronized with the BS. In the initial ranging process, the BS may allocate a dedicated ranging code and a ranging area to the allocated secondary carrier by the primary carrier or other secondary carriers allocated to the MS to accelerate the ranging process. For the MS, it can use the transmit power on the primary carrier as the reference for the uplink transmit power adjustment, and the synchronization between the MS and the BS for data interaction.

After the BS allocates the secondary carrier to the MS, it is required to maintain the association between the MS and the BS on the secondary carrier. At this time, the MS maintains synchronization with the BS through the uplink periodic ranging.

Secondary carrier update

After the secondary carrier is allocated, the MS and the BS may perform a secondary carrier update operation when the predetermined update condition is satisfied. For example, when the MS and the BS lose synchronization on the secondary carrier, the network load of the BS changes, or the channel condition on the secondary carrier between the MS and the BS changes, the secondary carrier used between the BS and the MS may be updated. Similar to the secondary carrier allocation operation described above, the update operation of the secondary carrier may be initiated by the BS or may be initiated by the MS, where The information exchange can be performed on the primary carrier or any working secondary carrier. The description is separately made below. 1. MS-initiated secondary carrier update

When the MS initiates the secondary carrier update, the MS sends a secondary carrier update request message to the BS to request the secondary carrier update. In response to the secondary carrier update request message, the BS may preferably perform the acknowledgement, or may directly The MS sends a secondary carrier update message to update the secondary carrier for the MS. Preferably, after receiving the secondary carrier update message, the MS may perform an acknowledgment. If the BS does not receive the acknowledgment or rejection of the MS within the preset time, the MS may resend the secondary carrier update message until receiving the information from the MS. Confirm or reject, or until the number of resends exceeds a predetermined threshold.

The secondary carrier update request message sent by the MS may carry the index number information and/or the center frequency information of the secondary carrier that is requested to be updated.

On the other hand, after the MS sends the secondary carrier update request message, the BS may reject the request due to network load imbalance or the like. If the request is rejected, the BS may send a secondary carrier update reject message to indicate that the update is rejected to the MS request. On the secondary carrier, preferably, the BS may carry the time information in the reject message, and the time information may be used to indicate the time when the MS re-initiates the request, and may also be used to indicate the time when the BS subsequently initiates the secondary carrier update. The invention is not limited thereto.

For the secondary carrier update initiated by the MS, as shown in FIG. 2a, an implementation process may include the following processes: During data interaction between the MS and the BS, the MS sends a secondary carrier update request message to the BS to request the secondary carrier. Update, the BS returns a secondary carrier update message to the MS, to indicate that the secondary carrier update is performed, and the MS returns a secondary carrier update acknowledgement message to the BS to confirm the secondary carrier update message, and then the BS and the MS perform secondary carrier update, and the secondary carrier The carrier is updated to the target secondary carrier.

Second, the secondary carrier update initiated by the BS

For the secondary carrier update operation initiated by the BS, the BS may send the secondary carrier update cancellation to the MS. The subsequent processing is similar to that initiated by the MS. Preferably, after receiving the secondary carrier update message, the MS may perform an acknowledgement. If the BS does not receive the acknowledgement or rejection of the MS within a preset time, the BS may resend the message. The secondary carrier updates the message until an acknowledgment or rejection from the MS is received, or until the number of retransmissions exceeds a predetermined threshold.

For the case where the foregoing MS feeds back the rejection to the BS, the following is further explained: When the BS initiates the secondary carrier update, the MS may refuse the update operation for some reasons, for example, the MS is performing real-time game service, etc., at this time, the MS may feedback Reject the updated message. Preferably, the MS may carry the time information in the reject message while rejecting, and the time information may be used to suggest the time when the BS re-initiates the request.

For the secondary carrier update initiated by the BS, as shown in FIG. 2b, an implementation process may generally include the following processing: During data interaction between the MS and the BS, the BS returns a secondary carrier update message to the MS to indicate that the secondary carrier is updated. The MS returns a secondary carrier update acknowledgement message or an acknowledgment header to the BS to confirm the secondary carrier update message, and then the BS and the MS perform secondary carrier update, and the original secondary carrier is updated to the target secondary carrier.

As can be seen from the above description, the peer can perform a reject or acknowledge operation, whether it is a secondary carrier update initiated by the BS or a secondary carrier update initiated by the MS.

The foregoing secondary carrier update message may include, but is not limited to, the following information: index number information and/or center frequency information of the original secondary carrier, index number information of the updated target secondary carrier, and/or center frequency information. Based on the above information, subsequent update operations can be performed.

Similar to the foregoing secondary carrier allocation operation, preferably, before performing the update operation of the secondary carrier, the BS may request the MS to perform channel estimation on the target carrier to be updated, and allocate the target secondary carrier according to the result of the channel estimation, thereby performing an update operation. More reasonable.

For the secondary carrier update operation, the specific implementation may include the following two modes: Mode 1: The MS synchronizes with the BS on the target secondary carrier, and then disconnects the data interaction with the allocated secondary carrier (the original secondary carrier); Two: MS disconnects and allocates data of the secondary carrier (original secondary carrier) Interacting, then, synchronizing with the BS on the target secondary carrier. In the above synchronization process, downlink synchronization and initial ranging synchronization may also be included. In the initial ranging, the BS may allocate a dedicated ranging code and arbitration area for the MS on the primary carrier or other working secondary carrier to speed up the ranging process; and the MS may use the transmission on the primary carrier. The power is used as a reference for uplink transmit power adjustment.

Secondary carrier release

When the predetermined release condition is satisfied, the MS and the BS can perform a secondary carrier release operation. For example, when the MS and the BS lose synchronization on the allocated secondary carrier, the data does not interact on the secondary carrier for a certain period of time, or the load on other carriers changes, the capability of the MS to support multiple carriers is turned off, and the scheduled use time of the secondary carrier When the service flow of the MS is deleted on the secondary carrier and other abnormal conditions have expired, the secondary carrier release operation can be performed. Similar to the secondary carrier allocation and the secondary carrier update operation described above, the release of the secondary carrier may also be initiated by the BS or by the MS. The description is separately made below.

1. MS-initiated secondary carrier release

When the MS initiates the release of the secondary carrier, the MS sends a secondary carrier release request message to the BS. After receiving the request from the MS, the BS may preferably perform the acknowledgement, or may directly feed back the secondary carrier release message without confirming, preferably, the MS. The secondary carrier release message may be acknowledged, and after receiving the acknowledgement of the MS, the MS and the BS perform secondary carrier release. This is the case when the BS accepts a release request initiated by the MS.

On the other hand, after the MS initiates the request, the BS may refuse to release for some reason. At this time, the BS may send a secondary carrier release reject message to reject the release operation. Preferably, when the refusal, the BS may carry time information, where the time information may be used to indicate that the BS and the MS re-execute the secondary carrier release operation at the time indicated by the time information, and may also be used to indicate that the MS subsequently re-initiates the time. The time of the secondary carrier release operation, etc., is not limited by the present invention.

For the secondary carrier release initiated by the MS, as shown in FIG. 3a, an implementation process can generally be packaged. In the data exchange process between the MS and the BS, the MS sends a secondary carrier release request message to the BS to request the secondary carrier release, and the BS returns a secondary carrier release message to the MS to indicate the secondary carrier release, MS. The secondary carrier release acknowledgement message or the acknowledgment header is returned to the BS to confirm the secondary carrier release message, and then the BS and the MS perform a secondary carrier release operation.

Second, the secondary carrier release initiated by the BS

When the secondary carrier is initiated by the BS, the BS sends a secondary carrier release message to the MS requesting resource release. Preferably, after receiving the resource release message, the MS may perform an acknowledgement. Based on this, if the BS does not receive the acknowledgment of the MS within a predetermined time, the BS may resend the secondary carrier release message until receiving the confirmation of the MS. , or the number of resends exceeds a predetermined threshold.

On the other hand, after the BS initiates the request, the MS may refuse to release for some reason. At this time, the MS may send a secondary carrier release reject message to reject the release operation. Preferably, when the refusal, the MS may carry the time information, and the time information may be used to suggest that the BS and the MS re-execute the secondary carrier release operation at the time indicated by the time information, which is not limited by the present invention.

For the secondary carrier release initiated by the BS, as shown in FIG. 3b, an implementation process may include the following processing: During data interaction between the MS and the BS, the BS returns a secondary carrier release message to the MS to indicate the secondary carrier release. The MS returns a secondary carrier release acknowledgement message or an acknowledgment header to the BS to confirm the secondary carrier release message, and then the BS and the MS perform a secondary carrier release operation.

As can be seen from the above description, the peer can perform a reject or acknowledge operation, whether it is for the secondary carrier release initiated by the BS or the secondary carrier release initiated by the MS.

It should be noted that, in the foregoing secondary carrier release message, the index number information of the secondary carrier wave or the center frequency information of the secondary carrier may be included, and the subsequent release operation may be performed according to the carried information.

The specific secondary carrier release operation may be implemented as follows: The MS deletes the locally stored information related to the secondary carrier, for example, the service connection information on the secondary carrier, and the like; The stored information related to the MS on the secondary carrier, for example, the MAC address and the secondary carrier mapping information of the MS.

Provided above is the management operation of the secondary carrier, wherein the allocation, update, and release operations may be used alone or in combination. The management operation of the primary carrier will be described below.

Main carrier switching (update)

According to an embodiment of the present invention, a multi-carrier management method is also provided. In this method, when a predetermined handover condition is met, a handover operation of a primary carrier between a BS and an MS is performed. Preferably, the predetermined handover condition herein includes However, it is not limited to the following cases: The MS and the BS lose synchronization on the assigned primary carrier, the network load of the BS changes, and the channel conditions on the primary carrier between the BS and the MS change.

Similar to the embodiment of the secondary carrier management given above, in this embodiment, the handover operation for the primary carrier may be initiated by the MS or by the BS. The description is separately made below.

First, the primary carrier switching operation initiated by the BS

In this case, the BS transmits a primary carrier switching message to the MS, instructing the MS to perform primary carrier switching.

After receiving the message of the BS, the MS may accept the primary carrier handover or may reject the primary carrier handover. If the MS rejects, the primary carrier handover reject message is returned to the BS. Preferably, the primary carrier handover reject message may carry time information, where the time information is used to indicate the time when the BS can resend the primary carrier update request message.

Alternatively, the MS may pre-arrange or stipulate that after receiving the primary carrier switching message of the BS, the MS returns an acknowledgement message, a confirmation header, or a reject message to the BS within a predetermined time. If the BS does not receive the message within the predetermined time, the BS The primary carrier switch message will be resent.

Figure 4a shows a BS initiated primary carrier switching operation. As shown in FIG. 4a, the BS and the MS perform data interaction on the original primary carrier. When the update needs to be performed, the BS sends a primary carrier update message to the MS, and the MS feeds back the primary carrier update confirmation message to the BS, and at a predetermined time. Then cut Switch to the target primary carrier. The predetermined time here may be predetermined by the system, pre-agreed by the BS and the MS, or specified by the BS in the primary carrier switching message.

Second, the primary carrier switching operation initiated by the MS

In this case, the MS actively sends a primary carrier switching request message to the BS, where the primary carrier switching request message is used to request primary carrier switching. After receiving the primary carrier handover request message from the MS, the BS may return a primary carrier handover message or a primary carrier handover rejection message to the MS, respectively, to indicate that the BS agrees to switch or rejects the handover. Preferably, the primary carrier handover reject message carries time information, where the time information is used to indicate the time when the MS resends the primary carrier handover request message, or is used to only time when the BS transmits the primary carrier handover message.

Figure 4b shows the MS initiated primary carrier update operation. As shown in FIG. 4b, the MS and the BS perform data exchange on the original primary carrier. When the primary carrier needs to be updated, the MS sends a primary carrier update request message to the BS. After receiving the request from the MS, the BS returns. The primary carrier update message, preferably, the MS may return a primary carrier update acknowledgement message to the BS and switch to the target primary carrier after a predetermined time. The predetermined time here may be predetermined by the system, pre-agreed by the BS and the MS, or specified by the BS in the primary carrier switching message.

Preferably, the primary carrier switching request message mentioned above carries index information and/or center frequency information of the target primary carrier to which the handover is made.

Specifically, when performing the handover operation, the MS may first synchronize with the BS on the target primary carrier, and then disconnect the data interaction with the allocated primary carrier; or, may also disconnect the allocated primary carrier first. Data interaction, and then synchronization with the BS on the target primary carrier; or, the MS can directly perform data interaction with the BS on the target primary carrier without performing synchronization with the BS on the target primary carrier. The invention is not limited thereto.

Through the foregoing description of the various embodiments, it can be seen that the multi-carrier management method provided by the embodiment of the present invention is preferably implemented as follows: When a predetermined condition for management is met, the MS or the BS initiates a corresponding operation by using a message, for example, , primary carrier switching, secondary carrier allocation, secondary carrier Switching, release of secondary carrier, etc. The series of operations can be initiated by setting a message (eg, a carrier management request message). The relevant message format is described as follows. The predetermined conditions here are also different depending on the multi-carrier management operation that needs to be performed. For details, refer to the above description.

The carrier management request message provided by the embodiment of the present invention is shown in Table 1 below. The message is used by the user to send a carrier management request to the BS to implement an operation in the operations of the primary carrier switching, the secondary carrier allocation, the secondary carrier update, and the secondary carrier release mentioned in the embodiment of the present invention.

Table 1: Carrier Management Request Message Format

The following Table 2 shows the carrier management message sent by the base station to the user. The message may be a carrier management message sent by the base station or may be a response to the carrier-initiated carrier management request message.

Table 2: Carrier Management Message Format

Dedicated resource identifier

If (dedicated resource exists) {

Dedicated ranging code

Dedicated ranging resource information

}

Else if (action code == 10){

Source carrier information

Target carrier information

Synchronization identifier

If (needs to sync) {

Dedicated resource existence identifier

If (dedicated resource exists) {

Dedicated ranging code

Dedicated Ranging Resource Information Dedicated Ranging Resource Offset

}

Else if (action code ==11) {

Carrier information

}

The following Table 3 shows the format of the acknowledgment message used in the embodiment of the present invention. For example, the acknowledgment message is used for the user to confirm the received carrier management message to the base station.

Table 3: Confirmation message format

Fig. 5 shows the structure of a confirmation head used in the embodiment of the present invention. As shown in Figure 5, in The field carried in the acknowledgment header includes the ACK message type, the interaction ID, the MS identifier, the HCS, etc. For example, the ACK type can occupy 8 bits, the interaction ID can occupy 7 bits, the HCS can occupy 8 bits, and the MS identifier MSB can occupy 8 bits, MS ID LSB can be occupied

8 bits, in addition, there are 7 reserved bits.

The foregoing technical solution provided by the embodiment of the present invention may implement management of multiple carriers in an MS initiated manner or a BS initiated manner, for example, implementing primary carrier switching, secondary carrier allocation, secondary carrier switching, and secondary carrier. Release and other operations. The implementation of the technical solution of the embodiment of the present invention in the communication protocol can be more easily understood by the above message format provided by the embodiment of the present invention. By applying the present invention to an actual communication process, multi-carrier management can be easily realized by message signaling without modifying the existing network architecture, and the system has good industrial applicability.

The above is only the preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes can be made to the present invention. Any modifications, equivalent substitutions, improvements, etc. within the spirit and scope of the invention are intended to be included within the scope of the invention.

Claims

Claim

A multi-carrier management method, the method comprising:

When the predetermined condition is met, the base station allocates a secondary carrier to the mobile station;

The predetermined condition is at least one of the following: when the mobile station requests a bandwidth or a secondary carrier from the base station, when a channel quality of a current working carrier of the mobile station is less than a predetermined threshold, and a secondary carrier allocation in a service flow establishing process When the policy requires allocation, when the service quality requirement of the service flow is allocated, when the base station is to be sent downlink data to the mobile station, when a new service needs to be established, and when the load balancing policy of the base station requires allocation.

The method according to claim 1, wherein the base station allocates a secondary carrier to the mobile station, specifically:

The base station sends a carrier management message for the secondary carrier allocation to the mobile station; the carrier management message for the secondary carrier allocation includes at least one of the following information: the secondary carrier index information, the secondary carrier center frequency information.

The method according to claim 2, wherein before the base station sends a carrier management message for the secondary carrier allocation to the mobile station, the method further includes:

The base station receives a bandwidth request message from the mobile station or a carrier management request message for a secondary carrier allocation request.

The method according to claim 2, wherein, after the base station sends the carrier management message for the secondary carrier allocation to the mobile station, the method further includes:

The base station retransmits the carrier management message for secondary carrier allocation if an acknowledgment message or acknowledgment header from the mobile station is not received within a predetermined time.

The method according to claim 1, wherein the assigning a secondary carrier to the mobile station by the base station includes:

The base station instructs the mobile station to perform channel estimation on a target carrier to be allocated, and allocates a secondary carrier according to a channel estimation result reported by the mobile station.

The method according to any one of claims 1 to 5, wherein the secondary carrier and the primary carrier are two frequency bands that are not adjacent, and the center frequency deviation of the two frequency bands is greater than a predetermined threshold value. The mobile station synchronizes with the base station on the allocated secondary carrier.

The method according to claim 6, wherein the synchronizing with the base station by the mobile station on the allocated secondary carrier comprises:

Before performing data interaction with the base station, the mobile station synchronizes with the base station on the assigned secondary carrier through an initial ranging procedure.

The method according to claim 7, wherein in the initial ranging process, at least one of the following operations is included:

And the base station allocates a ranging code and a ranging area to the secondary carrier allocated by the mobile station by using a primary carrier or other secondary carrier wave allocated to the mobile station;

The mobile station performs uplink transmit power adjustment according to the transmit power of the primary carrier.

In a process of performing data interaction with the base station, the mobile station synchronizes with the base station on the allocated secondary carrier by using an uplink periodic ranging process.

The method according to any one of claims 1 to 5, wherein the method further comprises: after allocating the secondary carrier, the method further comprises:

The base station performs a secondary carrier update operation with the mobile station when a predetermined update condition is satisfied.

The method according to claim 10, wherein the predetermined update condition comprises at least one of: when the mobile station and the base station lose synchronization on the allocated secondary carrier, When the network load of the base station changes, when the channel condition on the secondary carrier between the base station and the mobile station changes.

The method according to claim 10, wherein the base station and the mobile station perform a secondary carrier update operation by using a message interaction, where the message interaction includes: The base station sends a carrier management message for the secondary carrier update to the mobile station, indicating that the secondary carrier update is performed.

The method according to claim 12, further comprising: after transmitting the carrier management message for the secondary carrier update,

Receiving, by the base station, a secondary carrier update reject message returned by the mobile station; or

If the acknowledgment message or acknowledgment header or reject message from the mobile station is not received within a predetermined time, the base station will repeatedly transmit the carrier management message for the secondary carrier update.

The method according to claim 13, wherein the secondary carrier update reject message carries time information; wherein the time information is used to indicate that the base station can resend the secondary carrier update The time of the carrier management message.

The method according to claim 12, wherein before the base station sends a carrier management message for the secondary carrier update to the mobile station, the method further includes:

The base station receives a carrier management request message sent by the mobile station for requesting a secondary carrier update.

The method according to claim 15, wherein after receiving the carrier management request message for the secondary carrier update request, the method further includes:

The base station returns a carrier management message for the secondary carrier update to the mobile station; or the base station returns a secondary carrier update reject message to the mobile station.

The method according to claim 16, wherein the secondary carrier update reject message carries time information, and the time information is used to instruct the mobile station to resend the request for performing secondary carrier update. The time of the carrier management request message, or the time when the base station retransmits the carrier management message for the secondary carrier update.

The method according to claim 12, wherein the carrier management message for the secondary carrier update includes at least one of the following information: the allocated index information and/or the center of the secondary carrier. Frequency information, index information of the target secondary carrier to be updated, and/or center frequency signal Interest.

The method according to claim 10, wherein the secondary carrier update operation comprises:

The mobile station performs synchronization with the base station on the target secondary carrier, and then disconnects the data interaction with the assigned secondary carrier; or

The mobile station disconnects data interaction with the assigned secondary carrier and then performs synchronization with the base station on the target secondary carrier wave.

The method according to claim 10, wherein, before performing the secondary carrier update operation, the method further includes:

The base station instructs the mobile station to perform channel estimation on a target carrier to be allocated, and allocates the target secondary carrier according to a channel estimation result reported by the mobile station.

21. A multi-carrier management method, the method comprising:

The base station and the mobile station perform a secondary carrier release operation if the predetermined condition is met; the predetermined condition includes at least one of the following: the mobile station and the base station lose synchronization on the allocated secondary carrier, and have been allocated The duration of no data interaction on the secondary carrier exceeds a predetermined time, the load of other carriers changes, the capability of the mobile station to support multiple carriers is turned off, the scheduled use time of the secondary carrier has expired, and the mobile station The service flows on the secondary carrier are all deleted.

The method according to claim 21, wherein the base station and the mobile station perform a secondary carrier release operation by using a message exchange, where the message interaction includes:

The base station sends a carrier management message for the secondary carrier release to the mobile station, which is used to indicate that the secondary carrier release operation is performed.

The method according to claim 22, after the transmitting the carrier management message for the secondary carrier release, the method further includes:

Receiving, by the base station, a secondary carrier release reject message returned by the mobile station; or If the acknowledgment message, acknowledgment header or reject message from the mobile station is not received within a predetermined time, the base station repeatedly transmits the carrier management message for the secondary carrier release.

The method according to claim 23, wherein the secondary carrier release reject message carries time information, where the time information is used to indicate that the base station and the mobile station can perform a resource release operation again. .

Receiving, by the base station, a carrier management request message sent by the mobile station for requesting release of a secondary carrier;

The base station returns a secondary carrier release reject message or a carrier management message for secondary carrier release to the mobile station.

The method according to claim 25, wherein the secondary carrier release reject message carries time information, and the time information is used to indicate a time when the base station and the mobile station perform a resource release operation again. .

The method according to any one of claims 21 to 26, wherein the carrier management message for secondary carrier release includes at least one of the following information: secondary carrier index number information, auxiliary Carrier center frequency information.

The method according to any one of claims 21 to 26, wherein the performing the releasing operation comprises:

The mobile station deletes locally stored information related to the secondary carrier;

The base station deletes locally stored information related to the mobile station on the secondary carrier.

The method according to any one of claims 21 to 26, wherein the secondary carrier wave and the primary carrier are two frequency bands that are not adjacent, and the center frequency deviation of the two frequency bands is greater than a predetermined threshold.

30. A multi-carrier management method, the method comprising: Performing a handover operation of the primary carrier of the base station and the mobile station when the predetermined handover condition is met, where the predetermined handover condition includes at least one of the following: the mobile station and the base station lose synchronization on the allocated primary carrier, The network load of the base station changes, and the channel conditions on the primary carrier between the base station and the mobile station change.

The method according to claim 30, wherein the base station and the mobile station perform a primary carrier switching operation by using a message exchange, where the message interaction includes:

The base station transmits a carrier management message for primary carrier handover to the mobile station for indicating primary carrier switching.

The method according to claim 31, after the transmitting the carrier management message for the primary carrier handover, the method further includes:

Receiving, by the base station, a primary carrier handover reject message returned by the mobile station; or

If the acknowledgment message, acknowledgment header or reject message from the mobile station is not received within a predetermined time, the base station will repeatedly transmit the carrier management message for primary carrier handover.

The method according to claim 32, wherein the primary carrier handover reject message carries time information; the time information is used to indicate that the base station retransmits a carrier management message for primary carrier handover. time.

The base station receives a carrier management request message for the primary carrier handover request sent by the mobile station.

The method according to claim 34, after the receiving the carrier management request message for the primary carrier switching request, the method further includes:

The base station returns a carrier management message or a primary carrier handover reject message for primary carrier handover to the mobile station.

The method according to claim 35, wherein the primary carrier switching refuses to cancel And the time information is used to indicate the time when the mobile station retransmits the carrier management request message for the primary carrier handover request, or is used to instruct the base station to send the carrier for the primary carrier handover. Management;; Xiao, the time.

The method according to claim 35, wherein the carrier management message for primary carrier handover carries index information and/or center frequency information of the target primary carrier to which the handover is performed.

The method according to any one of claims 30 to 37, wherein the switching operation comprises one of the following operations:

The mobile station performs synchronization with the base station on the target primary carrier, and then disconnects data interaction with the allocated primary carrier;

The mobile station disconnects data interaction with the allocated primary carrier, and then performs synchronization with the base station on the target primary carrier;

The mobile station does not need to perform synchronization with the base station on the target primary carrier, and performs data interaction with the base station directly on the target primary carrier.

The method according to claim 38, wherein before the performing the switching operation, the method further comprises:

The base station instructs the mobile station to perform channel estimation on a target carrier to be allocated, and allocates the target primary carrier according to a channel estimation result reported by the mobile station.

40. A multi-carrier management method, the method comprising:

The mobile station sends a carrier management request message to the base station, where the carrier management request message carries the action identification information and the carrier identification information, where the carrier identification information is used to indicate the carrier to which the action indicated by the action identification information is applied; The action identification information is used to indicate one of the following operations: handover of a primary carrier, allocation of a secondary carrier, handover of a secondary carrier, and release of a secondary carrier.

41. A multi-carrier management method, the method comprising:

The base station sends a carrier management message to the mobile station, where the carrier management message carries an action label And the carrier identification information is used to indicate a frequency or a carrier to which the action indicated by the action identification information is applied; the action identification information is used to indicate one of the following operations: primary carrier switching, auxiliary Carrier allocation, secondary carrier switching, and secondary carrier release.

The method according to claim 41, wherein before the sending the carrier management message, the method further includes:

The base station receives a carrier management request message sent by the mobile station, where the carrier management request message is used to request the base station to perform one of the following operations: handover of a primary carrier, allocation of a secondary carrier, handover of a secondary carrier, and a secondary carrier Release.

The method according to claim 41, wherein, when the action identification information indicates that a secondary carrier switching operation is performed, the carrier identification information includes: original secondary carrier information and target secondary carrier information, respectively used to represent The secondary carrier before and after the secondary carrier switching is performed.

The method according to any one of claims 41 to 43, wherein the carrier management message further carries one of the following information: time information, configured to indicate that the action indicated by the action identification information occurs a synchronization identifier, configured to indicate whether the mobile station needs to synchronize with the base station on a target carrier, and a dedicated resource presence identifier, configured to indicate whether the target carrier is a fully configured carrier or a partially configured carrier; a dedicated ranging resource information, used to represent a dedicated ranging resource allocated on the target carrier.