CN105848292B

CN105848292B - Method and device for managing resources of secondary serving cell

Info

Publication number: CN105848292B
Application number: CN201510023354.2A
Authority: CN
Inventors: 杨立
Original assignee: ZTE Corp
Current assignee: ZTE Corp
Priority date: 2015-01-16
Filing date: 2015-01-16
Publication date: 2021-08-17
Anticipated expiration: 2035-01-16
Also published as: WO2016112715A1; CN105848292A

Abstract

The invention provides a method and a device for controlling resources of a secondary serving cell; the method comprises the following steps: an evolution base station acquires and configures an auxiliary service cell of a terminal; and the evolution base station sets at least two of the auxiliary service cells of the terminal to use the same resources of the unlicensed or licensed carrier.

Description

Method and device for managing resources of secondary serving cell

Technical Field

The present invention relates to the field of communications, and in particular, to a method and an apparatus for managing resources of a secondary serving cell.

Background

Fig. 1 is a schematic diagram of a system architecture of a Long Term Evolution system (LTE) in a 3GPP cellular mobile family system in the prior art, which includes: a Mobility Management Entity (MME) on a core network side, a Serving gateway (SGW, Serving GetWay), User Equipment (UE) or called a terminal (User Equipment) and a base station (eNodeB, abbreviated as eNB) on a radio access network side, where a Uu air interface or called an air interface is located between the UE and the MME, an S1-MME (S1for the Control plane) interface is located between the eNB and the SGW, an S1-U interface is located between the eNB and the MME, and an X2-U (X2-User plane) and an X2-C (X2-Control plane) interface are located between the enbs.

Starting from the Rel-10 release of the LTE system, in order to improve the peak rate of the terminal, dynamically coordinate and utilize the radio resources between the cells of multiple authorized carriers, the terminal and the base station can perform uplink and downlink communication in the cells configured on the multiple authorized carriers, so as to implement data transceiving on the multiple authorized carriers, and at this time, the base station configures multiple serving cells for the terminal: one primary serving cell Pcell (serving cell that solely undertakes PUCCH channel feedback) + a plurality of secondary serving cells scells (serving cells that have at least PDSCH/PUSCH channel data transmission). This is LTE Carrier Aggregation technology (CA), which is currently limited to Aggregation of licensed carriers for a while, and a terminal supports Aggregation of 5 licensed carriers at maximum, that is, a maximum Aggregation bandwidth is 5 × 20M — 100M.

Because authorized Carrier resources in an authorized frequency band of an LTE system are relatively scarce (requiring operators to buy for bidding), and Macro cell isomorphic deployment networking under a Macro base station (Macro eNB) cannot meet the increasing requirement of large service traffic of LTE users, LTE operators want to develop and utilize Unlicensed Carrier (Unlicensed Carrier) resources in an Unlicensed frequency band (requiring operators to buy for bidding, multiple operators can freely compete for preemption and use), and Micro cell heterogeneous deployment networking under a Micro base station (Micro eNB) or a Low Power base station Node (LPN, Low Power Node) is adopted to cover service hotspots, such as areas with dense population traffic.

Fig. 2(a) is a diagram illustrating LTE grant carrier aggregation in the prior art. In the schematic diagram of fig. 2(a), two uplink and downlink wireless coverage are substantially the same, and the macro cells on two adjacent different authorized carriers in the same authorized frequency band are configured as a schematic diagram of CA operation, so that the UE can perform uplink and downlink communication with the macro cells on the two authorized carriers simultaneously within the effective coverage range, thereby implementing data transceiving on the dual authorized carriers. Fig. 2(b) is a schematic diagram of LTE-authorized carrier aggregation in the prior art, which is obtained by adding two LPN micro cells on two different unlicensed carriers in an unlicensed frequency band on the basis of fig. 2(a), and maintaining synchronization of timing relationship between the two LPN micro cells in fig. 2(a) through terrestrial optical fiber cooperation; the macro cells on the two authorized carriers and the micro cells on the two unauthorized carriers can be configured to be CA operation together theoretically, and the UE can simultaneously perform uplink and downlink communication with the macro cells on the two authorized carriers and the micro cells on the two unauthorized carriers within the effective coverage range of the UE, so that data receiving and transmitting on multiple carriers are realized.

Fig. 3 is a diagram of a working architecture of LTE pure licensed carrier aggregation in the prior art; in the architecture shown in fig. 3, when an eNB or a UE serves as a transmitting end, an MAC protocol entity is configured with N parallel HARQ (Hybrid Automatic Repeat reQuest) entities, N HARQ data packets (or referred to as MAC PDUs) generated under a specific TTI (Transmission Time Interval) are subjected to a series of related processing (e.g., channel coding, modulation, resource block adaptive mapping, etc.) of a PHY entity of a physical layer, and finally converted into LTE-specific physical waveform signals, which are transmitted on N authorized carriers; the UE or eNB as the receiving end performs the reverse process through the MAC/PHY entity. Here, the unique primary serving cell Pcell and the N-1 secondary serving cells Scell are both configured on a licensed carrier.

Fig. 4 is a diagram of an operating architecture of LTE unlicensed carrier aggregation in the prior art. In the architecture shown in fig. 4, when an eNB or a UE serves as a transmitting end, a MAC protocol entity is configured with N parallel HARQ entities, some of which are conventional HARQ entities serving a licensed carrier (similar to the HARQ entities in fig. 4), and others are U-HARQ entities serving an unlicensed carrier (which need to modify and enhance characteristics of the conventional HARQ entities with respect to the unlicensed carrier); the generated N HARQ packets (or MAC PDUs) are subjected to a series of related processing (e.g., channel coding, modulation, resource block adaptation mapping, etc.) by a PHY entity of a physical layer, and finally converted into LTE-specific physical waveform signals, some of which are transmitted on a licensed carrier and others of which are transmitted on an unlicensed carrier, and the PHY and U-PHY entities are also distinguished herein to identify differences from conventional PHY entities. There is still a primary serving cell Pcell on a single licensed carrier and secondary serving cells scells on several licensed carriers, while there are also secondary serving cells U-scells on several unlicensed carriers.

Since resources on the unlicensed carrier are shared by multiple eNB/WIFI AP nodes of the same operator/different operators in a certain physical local area, each eNB monitors busy and idle of a detection channel in an LBT (Listen Before Talk) manner, and then tries to seize channel resources on the unlicensed carrier. For example, in the same service area, eNB1 of operator a configures CA for its user UE 1: pcell1+ U-Scell; operator B's eNB2 configures CA for its own user UE 2: pcell2+ U-Scell; the Pcell1 and the Pcell2 are respectively positioned on respective authorized carriers of an operator A/B, and have no interference conflict and channel resource sharing problem; however, the U-Scell is on the same unlicensed carrier, and at this time, whenever the eNB of the operator a/B wants to send data on the U-Scell, it must first monitor and detect whether the unlicensed carrier is occupied by other nodes eNB/WIFI AP/UE, etc. For example, if the received energy over the full bandwidth of the unlicensed carrier detected by the eNB1 performing cca (clear Channel assignment) at a certain period time is greater than a certain threshold, it indicates that it is already occupied at this time, and the eNB1 cannot preempt the Channel resource on the unlicensed carrier at this time. Then, the eNB1 typically backs off in time for a period of time, waits for the next cycle time, and then performs the next round of CCA detection to attempt to preempt resources on the unlicensed carrier.

Therefore, how to fully utilize the resources of a plurality of serving U-scells originated from eNB nodes in different physical locations on the same unlicensed carrier frequency point is an urgent problem to be solved. The problem is also generally applicable to scenes on the same authorized carrier frequency point.

Disclosure of Invention

The invention provides a method and a device for managing resources of a secondary serving cell, and aims to solve the technical problem of fully utilizing the resources of a plurality of serving U-Scell.

In order to solve the technical problems, the invention provides the following technical scheme:

a method for controlling resources of a secondary serving cell includes: an evolution base station acquires and configures an auxiliary service cell of a terminal; and the evolution base station sets at least two of the auxiliary service cells of the terminal to use the same resources of the unlicensed or licensed carrier.

The method for acquiring the auxiliary serving cell of the terminal by the evolution base station includes: the evolution base station acquires information of an unauthorized micro cell where the terminal is located; and the evolution base station selects an auxiliary service cell for the terminal according to the configuration frame format of the unauthorized or authorized micro cell.

Wherein the identities of at least two secondary serving cells using the resources of the same unlicensed or licensed carrier are different.

And the secondary serving cell identifier is a cell physical and global identifier PCI/ECGI.

A method for managing resources of a secondary serving cell includes: the terminal establishes wireless links with at least two auxiliary service cells of the terminal by using the same unauthorized or authorized carrier; and the terminal transmits data by using the resources of the wireless link.

Wherein the terminal transmits data by using the resources of the wireless link, and the method comprises the following steps: and carrying out uplink and downlink transmission of the data block according to the existing mode of the existing LTE technology.

Before the terminal acquires the right to use the unlicensed carrier of the secondary serving cell, the method further includes: and the terminal sends information of the unauthorized or authorized micro cell set in which the UE is positioned to an evolution base station.

An apparatus for controlling resources of a secondary serving cell, comprising: the acquisition module is used for acquiring an auxiliary service cell of the terminal; a setting module, configured to set at least two of the secondary serving cells of the terminal to use resources of the same unlicensed or licensed carrier.

Wherein the acquisition module comprises: an obtaining unit, configured to obtain information of an unauthorized or authorized micro cell where the terminal is located; and the selecting unit is used for selecting the auxiliary service cell for the terminal according to the configuration frame format of the unauthorized or authorized micro cell.

An apparatus for managing resources of a secondary serving cell, comprising: the establishing module is used for establishing wireless links with at least two auxiliary serving cells of the terminal by using the same unauthorized or authorized carrier; and the management module is used for transmitting data by utilizing the resources of the wireless link.

The management module is specifically configured to perform uplink and downlink transmission of a data block according to an existing manner of the existing LTE technology.

Wherein the apparatus further comprises: and the sending module is used for sending the identification information of the unauthorized or authorized micro cell set where the terminal is located to the evolution base station.

According to the embodiment of the invention, the terminal establishes a plurality of wireless links on a certain unauthorized carrier frequency point and a plurality of auxiliary service cells, so that peripheral unauthorized carrier resources are aggregated and utilized to the maximum extent, and the utilization rate of the resources is improved.

Drawings

Fig. 1 is a schematic diagram of a system architecture of a long term evolution system in a 3GPP cellular mobile family system in the prior art;

fig. 2(a) is a diagram illustrating LTE-authorized carrier aggregation in the prior art;

fig. 2(b) is a diagram illustrating LTE unlicensed carrier aggregation in the prior art;

fig. 3 is a diagram of a working architecture of LTE pure licensed carrier aggregation in the prior art;

fig. 4 is a working architecture diagram of LTE unlicensed carrier aggregation in the prior art;

fig. 5 is a flowchart illustrating a method for controlling resources of a secondary serving cell according to the present invention;

fig. 6 is a flowchart illustrating another method for controlling resources of a secondary serving cell according to the present invention;

fig. 7 is a schematic deployment diagram of an unlicensed carrier micro cell under a certain licensed carrier macro cell a of an operator a according to an embodiment of the present invention;

fig. 8 is a schematic deployment diagram of an unlicensed carrier micro cell under a certain licensed carrier macro cell B of an operator B according to a second embodiment of the present invention;

fig. 9 is a schematic structural diagram of a device for controlling resources of a secondary serving cell according to the present invention;

fig. 10 is a schematic structural diagram of another apparatus for managing resources of a secondary serving cell according to the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings and specific embodiments. It should be noted that the embodiments and features of the embodiments in the present application may be arbitrarily combined with each other without conflict.

Fig. 5 is a flowchart illustrating a method for controlling resources of a secondary serving cell according to the present invention. The method shown in fig. 5 includes:

step 501, an evolution base station acquires and configures an auxiliary service cell of a terminal;

step 502, the evolved node b sets at least two of the secondary serving cells of the terminal to use the same unlicensed or licensed carrier resources.

In the method embodiment provided by the invention, the evolution base station sets at least two of the auxiliary service cells of the terminal to use the same resources of the unauthorized or authorized carrier, so that the UE can establish a plurality of wireless links with a plurality of auxiliary service cells on a certain unauthorized or authorized carrier frequency point, thereby aggregating and utilizing the surrounding unauthorized or authorized carrier resources to the maximum extent and improving the utilization rate of the resources.

Fig. 6 is a flowchart illustrating another method for controlling resources of a secondary serving cell according to the present invention. The method shown in fig. 6 includes:

601, the terminal establishes wireless links with at least two auxiliary service cells of the terminal by using the same unauthorized or authorized carrier;

step 602, the terminal transmits data by using the resources of the wireless link.

In the method embodiment provided by the invention, the terminal establishes a plurality of wireless links with a plurality of auxiliary service cells on a certain unauthorized or authorized carrier frequency point, so that peripheral unauthorized or authorized carrier resources are aggregated and utilized to the maximum extent, and the utilization rate of the resources is improved.

The method provided by the present invention is further illustrated below:

both the eNB and the UE have the capability of CA for unlicensed carriers. The eNB can give the configuration that a certain LTE of a specific UE served by the eNB has the unauthorized carrier aggregation through the early-stage extensive scanning and monitoring detection of a target unauthorized frequency band, namely at least one Pcell on an authorized carrier and one or N unauthorized carrier cells U-Scell (i, j), wherein i is the index number of the unauthorized carrier and j is the index number of a service cell configured on the ith unauthorized carrier. According to the configuration limitation of the existing CA technology of LTE, j can only be 1, which means that only one U-Scell can be configured on the ith unlicensed carrier. According to the content of the present invention, j may take the value [ 1,2,3 … M ], which indicates that M U-scells can be maximally configured on the ith unlicensed carrier. The PCI/ECGI of the M U-Scell can be the same or different. The PCI/ECGI are the same, which means that the M U-Scell belongs to the same service cell from the view of a high-level RRC protocol, and each U-Scell is only one signal Transmission and reception Point (TP) under the cooperation of the service cell, which is not the content of the detailed description in the following; the difference in PCI/ECGI means that the M U-scells belong to multiple independent serving cells from the perspective of the higher layer RRC protocol, the RRC needs to be configured independently, and each U-Scell can transmit and receive signals independently, that is, the identities of at least two secondary serving cells using the same unlicensed carrier resource are different, which will be the content of the following detailed description of the present invention. And the secondary serving cell identifier is a cell physical and global identifier PCI/ECGI.

The evolution base station acquires information of an unauthorized micro cell where the terminal is located;

and the evolution base station selects an auxiliary service cell for the terminal according to the configuration frame format of the unauthorized or authorized micro cell.

Since there are two different cases of configuration frame formats, the following description will be made for the two cases:

1: U-Scell is a pure Downlink FDD frame format cell, namely U-SDL (Unlicensed-supplemental Downlink) condition; 2: U-Scell is a TDD frame format cell with Uplink and Downlink, namely U-UL/DL (Unlicensed-Uplink Downlink) case.

1, U-SDL configuration condition:

s1: for a specific UE, through RRM (Radio Resource Management) pilot measurement on the ith unlicensed carrier, it is found that the UE is simultaneously under signal coverage of a plurality of LTE unlicensed micro cells around the UE. By reading the system broadcast messages of these unlicensed micro cells, their cell physical and global identities PCI/ECGI are learned.

S2: UE sends identification information of an unauthorized or authorized micro cell set where the terminal is located to an evolution base station eNB; specifically, the UE sends an RRC message through a macro cell Signaling Radio Bearer (SRB) on the licensed carrier to report these discovered unlicensed micro cells to the eNB.

S3: the eNB searches and internally analyzes the PCI/ECGI of the unauthorized micro cells, and finds that a plurality of U-Scell (i, j) serving cells belong to the same eNB of the current macro cell and are in a U-SDL configuration mode, so that the downlink time sequences of the U-Scell (i, j) serving cells are the same, and the basic condition for configuring the downlink CA is met.

S4: the eNB uses LTE prior art: and the RRC configuration flow carries out CA configuration with unlicensed carriers on the UE, wherein the CA configuration comprises Pcell + a plurality of U-Scell (i, j).

S5: the eNB carries out MAC protocol layer related processing, such as management of a plurality of downlink parallel HARQ processes, sending preparation of a plurality of parallel MAC PDUs and the like, according to the same mode that the plurality of U-Scell (i, j) are located at different carrier frequency points, the eNB respectively sends the MAC protocol layer related processing to a plurality of U-Scell (i, j) service nodes through an Ideal Backhaul link (such as an optical fiber), and then carries out PDCCH cross-carrier downlink scheduling on the PCell.

S6: a plurality of U-Scell (i, j) service nodes perform downlink CCA detection at a certain specific moment according to the rule and the requirement of LBE (load Based Equipment) or FBE (frame Based Equipment), and try to occupy the whole unauthorized carrier channel; if the energy detected by the downlink CCA is lower than a specific threshold, the channel is idle, and each U-Scell (i, j) serving node can utilize the respective preempted unlicensed carrier resources to transmit the PDSCH data block. If the CCA detection fails, the serving node cannot transmit the PDSCH data block using the corresponding U-Scell (i, j) resource. Therefore, the UE can independently receive PDSCH data blocks from multiple U-scells (i, j), but cannot actually receive multiple PDSCH data blocks from multiple U-scells (i, j) simultaneously, and CCA detection and preemption by the transmitting node of U-scells (i, j) result in data block transmission and reception being staggered in time and time division.

S7: and the UE performs MAC protocol layer related processing, downlink MAC PDU receiving/reordering, downlink HARQ process feedback and PUCCH uplink feedback on the authorized macro cell Pcell according to the receiving result in the same way that the plurality of U-Scell (i, j) are positioned at different carrier frequency points.

The general working mode of the invention content is similar to that of the U-Scell (i, j) in different carrier frequency points, but the difference lies in that the U-Scell (i, j) can be actually configured in the same unauthorized carrier frequency point, so that the UE can establish a plurality of wireless links on a certain unauthorized carrier frequency point and a plurality of U-Scell (i, j), and maximally utilize the surrounding unauthorized carrier resources in a polymerization manner, thereby reducing the problem that a certain U-Scell (i, j) serving node cannot timely send PDSCH data blocks in a downlink manner because of experiencing CCA detection failure in a local area where the U-Scell (i, j) is located, and further having negative influence on the downlink data transmission rate.

The above inventive content can theoretically be applied to the case of authorized carriers, i.e. scells (i, j) can be configured at the same authorized carrier frequency point, so that the UE can establish multiple wireless links with multiple scells (i, j) at a certain authorized carrier frequency point. However, for the authorized carrier, because the multiple Scell (i, j) serving nodes do not perform CCA downlink detection before sending different PDSCH data blocks in downlink, if the multiple Scell (i, j) simultaneously schedule PDSCH data blocks in a certain TTI in downlink, the UE side may generate a reception collision and cannot correctly receive and demodulate; if a plurality of scells (i, j) do not schedule the PDSCH data block downlink in a certain TTI at the same time, a better gain can be obtained by optimizing single node scheduling or downlink multipoint Coordination (COMP), so that the content of the present invention has little application value. For the unlicensed carrier, because a plurality of U-Scell (i, j) serving nodes always perform CCA downlink detection before downlink transmission of a data block, the probability that the U-Scell (i, j) downlink schedules a PDSCH data block at a certain TTI at the same time is very low, the probability of a reception collision generated at the UE side is also low, and thus the probability of correct reception and demodulation is high. Due to the limitations of short-term property and fairness of the single node in preempting and using the unauthorized carrier resources, gains cannot be effectively obtained by optimizing the single node scheduling or downlink multi-point cooperation technology, and therefore the application value of the content of the invention is higher.

2: U-UL/DL configuration case.

The DL method is the same as the above case 1, except that the eNB performs downlink CCA detection and resource preemption restriction at the position of the TDD DL subframe; the UE corresponding to UL performs uplink CCA detection and resource preemption, which is limited to the position of the TDD UL subframe, and is described in detail below:

s1: for a specific UE, through RRM pilot measurement on the ith unlicensed carrier, the UE finds that the UE is simultaneously under the signal coverage of a plurality of peripheral LTE unlicensed micro cells. By reading the system broadcast messages of these unlicensed micro cells, their cell physical and global identities PCI/ECGI are learned.

S2: the UE sends RRC messages through a macro cell Signaling Radio Bearer (SRB) on the licensed carrier to report these discovered unlicensed micro cells to the eNB.

S3: the eNB finds that a plurality of U-Scell (i, j) serving cells belong to the same eNB of the current macro cell and are in a U-UL/DL configuration mode through retrieval and internal analysis of the PCI/ECGI of the unlicensed micro cells, so that uplink and downlink time sequences of the U-Scell (i, j) serving cells are the same, and basic conditions for configuring uplink and downlink CA are met.

S5: the eNB carries out MAC protocol layer related processing according to the same mode that a plurality of U-Scell (i, j) are located at different carrier frequency points, such as a plurality of uplink and downlink parallel HARQ process management, a plurality of parallel MAC PDU sending preparation and the like, and respectively sends the MAC protocol layer related processing to a plurality of U-Scell (i, j) service nodes through an Ideal Backhaul link (such as an optical fiber), and then carries out PDCCH cross-carrier downlink scheduling on an authorized macro cell Pcell. Because the UE also needs to transmit uplink data in the unlicensed carrier resources, the eNB also needs to perform PDCCH cross-carrier uplink scheduling on the licensed macro cell Pcell.

S6: a plurality of U-Scell (i, j) service nodes perform downlink CCA detection at a certain specific moment according to the rule and the requirement of LBE (load Based Equipment) or FBE (frame Based Equipment), and try to occupy the whole unauthorized carrier channel; if the energy detected by the downlink CCA is lower than a specific threshold, the channel is idle, and each U-Scell (i, j) serving node can utilize the respective preempted unlicensed carrier resources to transmit the PDSCH data block. If the CCA detection fails, the serving node cannot transmit the PDSCH data block using the corresponding U-Scell (i, j) resource. Therefore, the UE can independently receive PDSCH data blocks from multiple U-scells (i, j), but cannot actually receive multiple PDSCH data blocks from multiple U-scells (i, j) simultaneously, resulting in transmission and reception time staggering through CCA detection and preemption by the transmitting node of U-scells (i, j). For uplink, a single UE performs uplink CCA detection at a certain specific time according to the rule and requirement of lbe (load Based equipment) or fbe (frame Based equipment), and tries to occupy the entire unlicensed carrier channel; if the energy detected by the uplink CCA is lower than a specific threshold, the channel is idle, a single UE can preempt and utilize an unauthorized carrier resource to transmit a PUSCH data block, and the eNB can receive the uplink data block through a plurality of U-Scell (i, j) serving nodes to form receiving diversity. If the uplink CCA detection fails, the UE can not transmit the PUSCH data block temporarily, and the time backoff waits for the next preemption opportunity.

S7: and the UE performs MAC protocol layer related processing, downlink MAC PDU receiving/reordering, downlink HARQ process feedback and PUCCH uplink feedback on the authorized macro cell Pcell according to the receiving result in the same way that the plurality of U-Scell (i, j) are positioned at different carrier frequency points. And the U-Scell (i, j) service node sends the received PUSCH data block back to the eNB through an ideal return link, and the eNB carries out PHICH downlink confirmation feedback through the authorized macro cell Pcell as long as the eNB can correctly receive the PUSCH data block from one U-Scell (i, j) service node, otherwise, the UE is required to retransmit the PUSCH data block.

Example 1

Fig. 7 is a schematic deployment diagram of an unlicensed carrier micro cell under a certain licensed carrier macro cell a of an operator a according to an embodiment of the present invention. In the schematic diagram shown in fig. 7, the eNB determines that the working frequency range of the subsequent CA is: 10M U-Scell (i, j) bandwidth of 5160MHz-5170 MHz.

S101: for a specific UE, through RRM pilot frequency measurement on an unlicensed carrier wave from 5160MHz to 5170MHz, the UE finds itself under the signal coverage of a plurality of surrounding LTE unlicensed micro-cells at the same time. By reading the system broadcast messages of these unlicensed micro cells, their cell physical and global identities PCI/ECGI are learned.

S102: the UE sends Measurement Report messages to the eNB through a macro cell Signaling Radio Bearer (SRB) on the licensed carrier, and reports the discovered unlicensed micro cells to the eNB.

S103: the eNB finds that 3U-Scell (i,1), U-Scell (i,2) and U-Scell (i,3) serving cells belong to the same eNB of the current macro cell and are in a U-SDL configuration mode through retrieval and internal analysis of the PCI/ECGI of the unlicensed micro cells, so that downlink time sequences of the cells are the same and basic conditions for configuring downlink CA are met.

S104: the eNB uses LTE prior art: and the RRC configuration flow carries out CA configuration with an unlicensed carrier on the UE, wherein the CA configuration comprises Pcell + U-Scell (i,1) + U-Scell (i,2) + U-Scell (i, 3).

S105: the eNB carries out MAC protocol layer related processing according to the same mode of 3U-Scell (i,1), U-Scell (i,2) and U-Scell (i,3) in different carrier frequency points, for example, a plurality of downlink parallel HARQ process management, a plurality of parallel MAC PDU sending preparation and the like, sends the processing to the U-Scell (i,1), U-Scell (i,2) and U-Scell (i,3) service nodes through an Ideal Backhaul link (such as an optical fiber) respectively, and then carries out PDCCH cross-carrier downlink scheduling on the PCell of the authorized macro cell.

S106: the service node of the U-Scell (i,1), the U-Scell (i,2) and the U-Scell (i,3) performs downlink CCA detection at a certain moment according to the rule and the requirement of the FBE and tries to occupy the whole non-authorized carrier channel of 5160MHz-5170 MHz; if the energy detected by the downlink CCA is lower than a specific threshold, the channel is idle, and the serving nodes of U-Scell (i,1), U-Scell (i,2) and U-Scell (i,3) can utilize the respective occupied unlicensed carrier resources to transmit the PDSCH data block. If the CCA detection fails, the serving node cannot transmit the PDSCH data block using the corresponding resource. The UE independently receives PDSCH data blocks from U-Scell (i,1), U-Scell (i,2), U-Scell (i,3), but cannot actually receive multiple PDSCH data blocks simultaneously.

S107: and the UE performs MAC protocol layer related processing, downlink MAC PDU receiving/reordering and downlink HARQ process feedback in the same way as the U-Scell (i,1), the U-Scell (i,2) and the U-Scell (i,3) are in different carrier frequency points, and performs PUCCH uplink feedback on the authorized macro cell Pcell according to the received result.

For the aggregation of pure licensed carriers after LTE Rel-10 release. With this configuration constraint: the UE can only configure one serving Cell (unique Cell Physical Identity PCI, Physical Cell Identity, and Global Identity ECGI, E-UTRA Cell Global Identity) on each authorized carrier, and the maintenance and update of Pcell and scell(s) are completed through Radio Resource Management (RRM) and RRC connection reconfiguration mechanism of the LTE system. For example, a target Pcell _ new/Scell _ new with better radio quality coverage/lighter cell load is used to replace a source Pcell _ old/Scell _ old with poor radio quality coverage/heavier cell load, but only one Pcell/Scell can be configured on each authorized carrier at the same time. Different from the scenario of LTE pure licensed carrier aggregation, in the case of LTE unlicensed carrier aggregation, the resource existence and usability of U-scell (i) on each unlicensed carrier are uncertain for a specific UE, and even if the UE configures a certain U-scell (i) on a certain unlicensed carrier, the UE cannot occupy and utilize the unlicensed carrier resource at any moment, because the UE depends on the complex radio interference environment around the eNB node and the UE. If the LTE unlicensed carrier aggregation still continues to use the configuration constraint of pure licensed carrier aggregation, it may result in that the resource utilization efficiency of U-scell (i) is worse than that of licensed scell (i), so that the UE cannot sufficiently obtain the data rate gain from the CA technology.

Example 2

Fig. 8 is a schematic deployment diagram of an unlicensed carrier micro cell under a certain licensed carrier macro cell B of an operator B according to a second embodiment of the present invention. In the schematic diagram shown in fig. 7, the eNB determines that the working frequency range of the subsequent CA is: 5260MHz-5280MHz, 20M U-Scell (i, j) bandwidth.

S201: for a specific UE, through RRM pilot measurement on the unlicensed carrier wave of 5260MHz-5280MHz, the UE finds itself under the signal coverage of a plurality of surrounding LTE unlicensed micro-cells at the same time. By reading the system broadcast messages of these unlicensed micro cells, their cell physical and global identities PCI/ECGI are learned.

S202: the UE sends Measurement Report messages to the eNB through a macro cell Signaling Radio Bearer (SRB) on the licensed carrier, and reports the discovered unlicensed micro cells to the eNB.

S203: the eNB searches and internally analyzes the PCI/ECGI of the unlicensed microcells, and finds that the serving cells of U-Scell (i,1) and U-Scell (i,2) belong to the same eNB of the current macrocell and are in a U-UL/DL configuration mode, so that the uplink and downlink time sequences of the serving cells are the same, and the basic condition for configuring uplink and downlink CA is met.

S204: the eNB uses LTE prior art: and the RRC configuration flow carries out CA configuration with an unlicensed carrier on the UE, wherein the CA configuration comprises Pcell + U-Scell (i,1) + U-Scell (i, 2).

S205: the eNB carries out MAC protocol layer related processing, such as management of a plurality of uplink and downlink parallel HARQ processes, sending preparation of a plurality of parallel MAC PDUs and the like, according to the same mode that the U-Scell (i,1) and the U-Scell (i,2) are located at different carrier frequency points, the MAC protocol layer related processing is respectively sent to the U-Scell (i,1) and the U-Scell (i,2) serving nodes through an Ideal Backhaul link (such as an optical fiber), and then PDCCH cross-carrier downlink scheduling is carried out on the PCell of the authorized macro cell. Because the UE also needs to transmit uplink data in the unlicensed carrier resources, the eNB also needs to perform PDCCH cross-carrier uplink scheduling on the licensed macro cell Pcell.

S206: the service node of the U-Scell (i,1) performs downlink CCA detection at a certain specific moment according to the rule and the requirement of the FBE, and tries to occupy an unlicensed carrier channel of 5260MHz-5280 MHz; and if the energy detected by the downlink CCA is lower than a specific threshold, the channel is idle, and the U-Scell (i,1) and U-Scell (i,2) serving nodes can utilize the respective occupied unlicensed carrier resources to transmit the PDSCH data block. If the CCA detection fails, the serving node cannot transmit the PDSCH data block using the corresponding resource. The UE thus receives PDSCH data blocks independently from U-Scell (i,1), U-Scell (i,2), but cannot receive multiple PDSCH data blocks simultaneously. For uplink, a single UE performs uplink CCA detection at a certain specific moment according to the rules and requirements of FBE and tries to occupy an unlicensed carrier channel of 5260MHz-5280 MHz; if the energy detected by the uplink CCA is lower than a specific threshold, the channel is idle, the single UE can preempt and utilize the unauthorized carrier resources to transmit the PUSCH data block, and the eNB can receive the PUSCH data block through the U-Scell (i,1) and U-Scell (i,2) serving nodes to form receiving diversity. If the uplink CCA detection fails, the UE can not transmit the PUSCH data block temporarily, and the time backoff waits for the next preemption opportunity.

S207: and the UE performs MAC protocol layer related processing, downlink MAC PDU receiving/reordering, downlink HARQ process feedback and PUCCH uplink feedback on the authorized macro cell Pcell according to the received result in the same way that the U-Scell (i,1) and the U-Scell (i,2) are positioned at different carrier frequency points. And the U-Scell (i,1) serving node sends the received PUSCH data block back to the eNB through an ideal return link, and the eNB carries out PHICH downlink confirmation feedback through the authorized macro cell Pcell as long as the PUSCH data block can be correctly received from any one of the U-Scell (i,1) and the U-Scell (i,2), otherwise, the UE is required to retransmit the PUSCH data block.

It should be noted that, when the terminal performs data transmission by using the method provided by the present invention, it may perform uplink and downlink data transmission according to the existing LTE technology, that is, perform data transmission according to the premise that the auxiliary serving cells specified in the protocol are at different carrier frequency points and the same, that is, when using the method of the present invention, although the resource deployment mode of the auxiliary serving cell is different from that specified in the protocol, it may still perform data transmission by using the mode specified in the protocol, and it is not necessary to make any modification to the existing transmitter, and it may fully utilize the resource utilization rate, and it is simple and convenient to implement.

Fig. 9 is a schematic structural diagram of a device for controlling resources of a secondary serving cell according to the present invention. In connection with the method described in fig. 5 to 8, the apparatus of fig. 9 comprises:

an obtaining module 901, configured to obtain an auxiliary serving cell of a terminal;

a setting module 902, configured to set at least two of the secondary serving cells of the terminal to use resources of the same unlicensed or licensed carrier.

Wherein the obtaining module 901 includes:

an obtaining unit, configured to obtain information of an unauthorized or authorized micro cell where the terminal is located;

and the selecting unit is used for selecting the auxiliary service cell for the terminal according to the configuration frame format of the unauthorized or authorized micro cell.

In the device embodiment provided by the invention, the evolution base station sets at least two of the auxiliary service cells of the terminal to use the same resources of the unauthorized or authorized carrier, so that the UE can establish a plurality of wireless links with a plurality of auxiliary service cells on a certain unauthorized or authorized carrier frequency point, thereby aggregating and utilizing the surrounding unauthorized or authorized carrier resources to the maximum extent and improving the utilization rate of the resources.

Fig. 10 is a schematic structural diagram of another apparatus for managing resources of a secondary serving cell according to the present invention. The apparatus shown in fig. 10, in combination with the method described in fig. 5 to 8, comprises:

an establishing module 1001, configured to establish a wireless link with at least two secondary serving cells of the terminal using the same unlicensed or licensed carrier;

a management module 1002, configured to transmit data using the resources of the wireless link.

The management module 1002 is specifically configured to perform uplink and downlink transmission of a data block according to an existing manner of the existing LTE technology.

Wherein the apparatus further comprises:

and the sending module is used for sending the identification information of the unauthorized or authorized micro cell set where the terminal is located to the evolution base station.

According to the device embodiment provided by the invention, the terminal establishes a plurality of wireless links with a plurality of auxiliary service cells on a certain unauthorized or authorized carrier frequency point, so that peripheral unauthorized or authorized carrier resources are aggregated and utilized to the greatest extent, and the utilization rate of the resources is improved.

It will be understood by those of ordinary skill in the art that all or part of the steps of the above embodiments may be implemented using a computer program flow, which may be stored in a computer readable storage medium and executed on a corresponding hardware platform (e.g., system, apparatus, device, etc.), and when executed, includes one or a combination of the steps of the method embodiments.

Alternatively, all or part of the steps of the above embodiments may be implemented by using an integrated circuit, and the steps may be respectively manufactured as an integrated circuit module, or a plurality of the blocks or steps may be manufactured as a single integrated circuit module. Thus, the present invention is not limited to any specific combination of hardware and software.

The devices/functional modules/functional units in the above embodiments may be implemented by general-purpose computing devices, and they may be centralized on a single computing device or distributed on a network formed by a plurality of computing devices.

Each device/function module/function unit in the above embodiments may be implemented in the form of a software function module and may be stored in a computer-readable storage medium when being sold or used as a separate product. The computer readable storage medium mentioned above may be a read-only memory, a magnetic disk or an optical disk, etc.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A method for controlling resources of a secondary serving cell, comprising:

the method comprises the steps that an evolution base station obtains information of an unauthorized or authorized micro cell under signal coverage of a terminal, and configures an auxiliary service cell of the terminal according to the information of the unauthorized or authorized micro cell under signal coverage of the terminal;

the evolution base station sets at least two resources using the same unlicensed or licensed carrier in the auxiliary service cell of the terminal; the identifiers of at least two secondary serving cells using the same unlicensed or licensed carrier are different, and the at least two secondary serving cells with different identifiers belong to at least two independent serving cells.

2. The method according to claim 1, wherein the evolved node b configures a secondary serving cell of the terminal according to information of an unlicensed or licensed micro cell under signal coverage of the terminal, including:

and the evolution base station selects an auxiliary service cell for the terminal according to the information of the unauthorized or authorized micro cell under the signal coverage of the terminal and the configuration frame format of the unauthorized or authorized micro cell.

3. The method according to claim 2, wherein the selecting, by the enb, the secondary serving cell for the terminal according to the information of the unlicensed or licensed micro cell under the signal coverage of the terminal and the configuration frame format of the unlicensed or licensed micro cell comprises:

and selecting the auxiliary service cells which belong to the same evolution base station of the current macro cell and have the same configuration frame format for the terminal.

4. The method of claim 1, wherein the identity of the secondary serving cell is a cell physical and global identity (PCI/ECGI).

5. A method for managing resources of a secondary serving cell, comprising:

the terminal establishes wireless links with at least two auxiliary service cells of the terminal by using the same unauthorized or authorized carrier; wherein, the identifiers of at least two secondary serving cells using the same unlicensed or licensed carrier are different, and the at least two secondary serving cells with different identifiers belong to at least two independent serving cells;

and the terminal transmits data by using the resources of the wireless link.

6. The method of claim 5, wherein the terminal transmits data using the resources of the radio link, and wherein the method comprises:

and carrying out uplink and downlink transmission of the data block according to the existing mode of the existing LTE technology.

7. The method of claim 5, wherein before the terminal acquires the usage right of the unlicensed carrier of the secondary serving cell, the method further comprises:

the terminal sends identification information of an unauthorized or authorized micro cell set under the signal coverage of the terminal to an evolution base station.

8. An apparatus for controlling resources of a secondary serving cell, comprising:

the system comprises an acquisition module, a processing module and a processing module, wherein the acquisition module is used for acquiring information of an unauthorized or authorized micro cell under signal coverage of a terminal and configuring an auxiliary service cell of the terminal according to the information of the unauthorized or authorized micro cell under signal coverage of the terminal;

a setting module, configured to set at least two of the secondary serving cells of the terminal to use resources of the same unlicensed or licensed carrier; the identifiers of at least two secondary serving cells using the same unlicensed or licensed carrier are different, and the at least two secondary serving cells with different identifiers belong to at least two independent serving cells.

9. The apparatus of claim 8, wherein the obtaining module comprises:

an obtaining unit, configured to obtain information of an unauthorized or authorized micro cell under signal coverage of the terminal;

a selecting unit, configured to select a secondary serving cell for the terminal according to information of an unauthorized or authorized micro cell under signal coverage of the terminal and a configuration frame format of the unauthorized or authorized micro cell.

10. The apparatus according to claim 9, wherein the selection unit is specifically configured to:

11. The apparatus of claim 8, wherein the identity of the secondary serving cell is a cell physical and global identity (PCI/ECGI).

12. An apparatus for managing resources of a secondary serving cell, comprising:

the system comprises an establishing module, a receiving module and a sending module, wherein the establishing module is used for establishing wireless links with at least two auxiliary serving cells of a terminal by using the same unauthorized or authorized carrier; wherein, the identifiers of at least two secondary serving cells using the same unlicensed or licensed carrier are different, and the at least two secondary serving cells with different identifiers belong to at least two independent serving cells;

and the management module is used for transmitting data by utilizing the resources of the wireless link.

13. The apparatus of claim 12, wherein the management module is specifically configured to perform uplink and downlink transmission of the data block according to an existing manner of an existing LTE technology.

14. The apparatus of claim 12, further comprising:

and the sending module is used for sending the identification information of the unauthorized or authorized micro cell set under the signal coverage of the terminal to the evolution base station.