WO2013123872A1

WO2013123872A1 - Method, system and device for configuring and synchronizing extension carrier

Info

Publication number: WO2013123872A1
Application number: PCT/CN2013/071670
Authority: WO
Inventors: 梁靖; 许芳丽
Original assignee: 电信科学技术研究院
Priority date: 2012-02-20
Filing date: 2013-02-19
Publication date: 2013-08-29
Also published as: CN102612133B; CN102612133A

Abstract

The present application relates to the technical field of wireless communications, and particularly to a method, system and device for configuring and synchronizing an extension carrier, which are used for configuring and synchronizing an extension carrier. The method for configuring an extension carrier in the present application comprises: a network-side device determining carrier information about an extension carrier needing to be configured for user equipment, the carrier information comprising the identifier of the extension carrier and/or configuration information about a reference symbol of the extension carrier; and the network-side device sending the carrier information to the user equipment. A network-side device sends to user equipment carrier information about an extension carrier which comprises the identifier of the extension carrier and/or configuration information about a reference symbol of the extension carrier, thereby being able to configure the extension carrier for the user equipment and enabling the user equipment to use the extension carrier.

Description

Method, system and device for configuring and synchronizing extended carrier The present application claims to be submitted to the Chinese Patent Office on February 20, 2012, application number 201210040156.3, and the invention name is "a method, system and device for configuring and synchronizing extended carriers" ", and the priority of the Chinese patent application filed on March 5, 2012, filed on the Chinese Patent Office, Application No. 201210055862.5, entitled "A Method and System for Configuring and Synchronously Expanding Carriers", the entire contents of which are The citations are incorporated herein by reference. Technical field

The present invention relates to the field of wireless communication technologies, and in particular, to a method, system and device for configuring and synchronizing an extended carrier. Background technique

The peak rate of the Long Term Evolution-Advanced (LTE-A) system is much higher than that of LTE: it requires a downlink of 1 Gbps and an uplink of 500 Mbps. At the same time, LTE-A systems require very good compatibility with LTE systems. The LTE-A system introduces Carrier Aggregation (C A ) technology based on the need to increase the peak rate, be compatible with LTE systems, and make full use of spectrum resources.

The carrier aggregation technology is that the user equipment can work simultaneously on multiple cells, and one cell includes a pair of UL (uplink) / DL (downlink) component carriers (CC) instead of the LTE system and the previous wireless There is only one set of carrier modes in the communication system. In a carrier aggregation system, each component carrier may be continuous or non-contiguous, and the bandwidth between the component carriers may be the same or different. To maintain compatibility with the LTE system, the maximum bandwidth limit of each component carrier is 20 MHz. At present, it is generally considered that the maximum number of cells that a user equipment can aggregate is five. In addition, LTE-A also classifies the cells of carrier aggregation, which are divided into:

Primary Cell (PCell): The terminal aggregates only one cell of the multiple cells, which is defined as a Pcell. The Pcell is selected by the base station and configured to the terminal by Radio Resource Control (RRC) signaling. Only the Physical Uplink Control Channel (PUCCH) is configured on the Pcell.

Secondary Cell (SCell): All cells except the Pcell in all cells aggregated by the terminal are SCelL.

In the CA system, some cell management and other processes (such as deleting one secondary cell, reconfiguring a secondary cell, activating/deactivating a secondary cell, signaling the traffic of the serving cell, etc.) need to frequently search the aggregated cell of the UE. A cell within an aggregation range may be uniquely determined by a frequency point and a physical cell ID (PCI). From the perspective of signaling overhead, a large number of reuse parameters of carrier frequency and PCI can be avoided by introducing a cell number parameter. At present, in the standard discussion, it has been decided to introduce a UE-level cell number parameter, which is encoded as 3 bits, and the cell number of one cell will be allocated to the UE by the network while the cell is newly added. The cell number of the primary cell is fixed to 0, and the cell number of the secondary cell is used in the range of 1 to 7. The service of the user equipment may be volatility and bursty, that is, the amount of traffic is small during a certain period of time, and the traffic volume is large during a certain period of time. When the user equipment traffic is relatively small, for better power saving. The LTE-A system introduces the concept of activation/deactivation, and stipulates that the Pell of the UE is not allowed to be deactivated, the default is always active, and the Scell can be activated/deactivated.

For a deactivated carrier, the UE does not need to perform a physical downlink control channel (Physical Downlink Control)

Channel, PDCCH) Physical Downlink Shared Channel (PDSCH) reception, no need to transmit Physical Uplink Shared Channel (PUSCH) / Sounding Reference Signal (SRS) ) / Channel Quality Indicator (CQI), etc., so that better power saving effect can be achieved.

LTE-A Release 11 (R11) is based on improved spectrum efficiency, better support for Hetnet (heterogeneous network) scenarios, and power saving considerations. It is decided to enhance downlink transmission and introduce a new downlink carrier, which is called downlink. Extended carrier.

Since the extension carrier is newly introduced in the LTE-A system, there is currently no measurement and synchronization scheme for the extension carrier. Summary of the invention

A method and device for configuring an extended carrier are provided for configuring an extended carrier.

The embodiment of the invention further provides a method, system and device for synchronizing an extended carrier, which are used for synchronizing an extended carrier. A method for configuring an extended carrier according to an embodiment of the present invention includes:

The network side device determines carrier information of an extension carrier that needs to be configured for the user equipment, where the carrier information includes an identifier of the extension carrier and/or configuration information of a reference symbol of the extension carrier;

The network side device sends the carrier information to the user equipment.

A network side device for configuring an extended carrier according to an embodiment of the present invention includes:

a determining module, configured to determine carrier information of an extended carrier that needs to be configured for the user equipment, where the carrier information includes an identifier of the extended carrier and/or configuration information of a reference symbol of the extended carrier;

And a sending module, configured to send the carrier information to the user equipment.

Since the network side transmits the carrier information of the extension carrier including the identifier of the extension carrier and/or the configuration information of the reference symbol of the extension carrier to the user equipment, the extension carrier can be configured for the user equipment, so that the user equipment can use the extension carrier.

A method for synchronously expanding a carrier according to an embodiment of the present invention includes:

The user equipment receives carrier information from an extension carrier of the network side, where the carrier information includes an identifier of the extension carrier and/or configuration information of a reference symbol of the extension carrier;

The user equipment performs downlink synchronization with the extension carrier according to the carrier information.

A user equipment for synchronizing an extended carrier according to an embodiment of the present invention includes: a receiving module, configured to receive carrier information of an extended carrier from a network side, where the carrier information includes an identifier of an extended carrier and/or configuration information of a reference symbol of an extended carrier;

And a processing module, configured to perform downlink synchronization with the extended carrier according to the carrier information.

A system for synchronously expanding a carrier according to an embodiment of the present invention includes:

a network side device, configured to determine carrier information of an extended carrier that needs to be configured for the user equipment, and send the carrier information to the user equipment, where the carrier information includes an identifier of the extended carrier and/or a configuration of a reference symbol of the extended carrier Information

And a user equipment, configured to receive carrier information from the extended carrier on the network side, and perform downlink synchronization with the extended carrier according to the carrier information.

Since the user equipment synchronizes according to the received carrier information of the extended carrier from the network side including the identifier of the extended carrier and/or the configuration information of the reference symbol of the extended carrier, the extended carrier can be synchronized, and the performance of the carrier aggregation can be further improved. . DRAWINGS

1 is a schematic structural diagram of a system for synchronizing an extended carrier according to an embodiment of the present invention;

2 is a schematic structural diagram of a network side device in a system for synchronizing an extended carrier according to an embodiment of the present invention;

3 is a schematic structural diagram of user equipment in a system for synchronizing an extended carrier according to an embodiment of the present invention;

4 is a schematic flowchart of a method for configuring an extended carrier according to an embodiment of the present invention;

FIG. 5 is a schematic flowchart of a method for synchronously expanding a carrier according to an embodiment of the present invention. detailed description

In the embodiment of the present invention, the network side sends the carrier information of the extended carrier including the identifier of the extended carrier and/or the configuration information of the reference symbol of the extended carrier to the user equipment, so that the extended carrier can be configured for the user equipment, so that the user equipment can use the extended carrier;

In the embodiment of the present invention, the user equipment synchronizes according to the received carrier information of the extended carrier from the network side including the identifier of the extended carrier and/or the configuration information of the reference symbol of the extended carrier, so that the extended carrier can be synchronized, and the carrier can be further improved. The performance of the polymerization.

In the downlink extended carrier design, the current protocol supports at least two scenarios, synchronous and asynchronous. The so-called synchronization scenario, that is, the extended carrier is at least time-frequency synchronized with a backward compatible carrier and/or cell aggregated by the user equipment, that is, the user equipment receiver does not need to perform additional downlink synchronization processing on the extension carrier. The so-called asynchronous scenario, that is, the extended carrier and any backward compatible carrier or cell aggregated by the user equipment are not time-frequency synchronized, and the user equipment receiver needs to perform additional downlink synchronization processing on the extended carrier. For the synchronized extended carrier, only the Channel State Information-Reference Signal (CSI-RS) may be transmitted for mobility measurement; for the unsynchronized extended carrier, the primary synchronization signal may be transmitted (Primary Synchronized) Signal , PSS ) / secondary sync signal (Secondary Synchronized Signal, SSS), Common Reference Signal (CRS) or CSI-RS for synchronization, transmitting CRS or CSI-RS for mobility measurement.

The reference symbols of the embodiments of the present invention include but are not limited to the following signals:

PSS, SSS, CRS and CSI-RS.

The identifier of the extended carrier in the embodiment of the present invention is a frequency point of the extended carrier and the PCI, and may also be a cell identifier.

(Cell ID) and EUTRAN Cell Global Identity (ECGI; EUTRAN, Evolved UMTS Terrestrial Radio Access Network, UMTS, Universal Mobile Telecommunication System, Universal Mobile Telecommunications System).

The embodiments of the present invention are further described in detail below with reference to the accompanying drawings.

In the following description, the implementation of the cooperation between the network side and the user equipment side will be described first. Finally, the implementations from the network side and the user equipment side will be described separately, but this does not mean that the two must be implemented together. In fact, When the network side is implemented separately from the user equipment side, the problems existing on the network side and the user equipment side are also solved, but when the two are combined, a better technical effect is obtained.

As shown in FIG. 1, the system for synchronizing extension carriers in the embodiment of the present invention includes: a network side device 10 and a user equipment 20. The network side device 10 is configured to determine carrier information of an extension carrier that needs to be configured for the user equipment 20, where the carrier information includes an identifier of the extension carrier and/or configuration information of a reference symbol of the extension carrier, and the carrier information is sent to the user equipment 20;

The user equipment 20 is configured to receive carrier information of the extension carrier from the network side device 10, and perform downlink synchronization with the extension carrier according to the carrier information.

In the implementation, before the network side device 10 sends the carrier information, it is also required to determine whether the user equipment 20 can perform downlink synchronization of the extended carrier.

Specifically, the network side device 10 transmits carrier information after determining that the user equipment 20 supports extended carrier synchronization.

In addition to the above manner, the network side device 10 may further transmit the carrier information after determining that the extension carrier is the synchronous extension carrier, because the synchronization cell corresponding to the synchronization extension carrier needs to be synchronized when synchronizing with the synchronization extension carrier. .

Preferably, if the extended carrier aggregation is required, the network side device 10 sends the carrier information to the user equipment 20 after determining that the user equipment 20 supports the extended carrier aggregation.

Preferably, if the extended carrier measurement is required, the network side device 10 transmits the carrier information to the user equipment 20 after determining that the user equipment 20 supports the extended carrier measurement.

In an implementation, the network side device 10 may determine whether the user equipment 20 is required to perform carrier aggregation or measurement, or perform carrier aggregation and measurement. In a preferred manner, the network side device 10 can place the carrier information in a message notifying the user equipment 20 to perform corresponding operations. For example, if the user equipment 20 is required to perform aggregation, and the aggregated message is to be sent to the user equipment 20, the carrier information may be placed in the aggregated message. The network side device 10 may determine, according to its own capability reported by the user equipment 20, whether the user equipment supports one or more of synchronous extended carrier synchronization, extended carrier aggregation, and extended carrier measurement; or may be based on the version of the user equipment 20. The number determines whether the user equipment 20 supports one or more of synchronous extended carrier synchronization, extended carrier aggregation, and extended carrier measurement.

In an implementation, the user equipment 20 may use the synchronization capability of the extended carrier, the aggregation capability of the extended carrier, and the measurement capability of the extended carrier in an explicit manner or an implicit manner based on the user equipment 20 or based on a frequency band or a frequency band combination. One or more.

For example, for the reporting of the extended carrier aggregation capability, the user equipment 20 may report the report based on each band (band); or may be reported based on the aggregated band combination. For example, when the carriers in the band1 and the band2 are aggregated, the aggregation in the band2 may be simultaneously performed. Extended carrier.

The ability to aggregate synchronous extended carriers can be explicitly indicated (for example, in an aggregated band combination, indicating whether the synchronized extended carriers can be aggregated), or implicitly indicated (for example, an aggregated carrier can be aggregated, but cannot be aggregated) For non-synchronous extension carriers, the default is to aggregate synchronous extension carriers.

The above is an example of the above-mentioned extended carrier aggregation capability. The synchronization capability and the measurement capability of the extended carrier are similar to those of the aggregation capability, and are not described here. The synchronization capability and/or measurement capability of the extended carrier can report whether synchronization or/or measurement of a reference symbol is supported.

The extension carrier of the embodiment of the present invention may be a synchronous extension carrier or a non-synchronous extension carrier.

Preferably, if the extension carrier is a synchronous extension carrier, the network side device 10 places the identifier of the synchronization cell corresponding to the extension carrier in the carrier information;

Correspondingly, the user equipment 20 determines the synchronization cell according to the identifier of the synchronization cell, and performs downlink synchronization with the synchronization cell, and completes synchronization with the extension carrier after synchronization with the synchronization cell.

In an implementation, the identifier of the synchronization cell in the embodiment of the present invention includes but is not limited to one of the following information: a frequency point and a PCI, an ECGI, and a cell identifier.

The synchronous cell is referred to as a high-level address, and the physical layer is referred to as a synchronous carrier. Therefore, for different layer names, the synchronous cell may also be referred to as a synchronous carrier.

Preferably, if the extension carrier is a non-synchronous extension carrier, the user equipment 20 determines the extension carrier according to the identifier of the extension carrier, and performs downlink synchronization with the extension carrier according to the configuration information of the reference symbol.

Preferably, after the user equipment 20 performs downlink synchronization with the extension carrier, the extension carrier can also be measured according to the configuration information of the reference symbol.

Preferably, after the user equipment performs downlink synchronization with the extended carrier, carrier aggregation may also be performed on the extended carrier. In an implementation, the extended carrier may be an extended carrier of the neighboring network side device, and the network side device 10 may obtain the extended carrier of the neighboring network side device by using an X2 interface or an operation and maintenance (O&M) device. Carrier information. Preferably, in the handover process, if the network side device 10 is the target network side device and the target cell includes an extension carrier, the network side device 10 places the carrier information of the extension carrier in the handover command.

If the carrier information includes the identification of the extension carrier or the configuration information of the reference symbol of the extension carrier, the acquisition of another parameter may be pre-agreed.

Specifically, if the carrier information does not include the configuration information of the reference symbol of the extended carrier, the network side device 10 and the user equipment 20 determine the configuration information of the reference symbol of the extended carrier according to a preset setting;

If the carrier information does not include the identifier of the extension carrier, the network side device 10 and the user equipment 20 determine the identity of the extension carrier according to a preset setting.

The pre-agreed manner in the embodiment of the present invention may be any manner that can ensure that the network side and the user equipment side maintain the same understanding of another parameter, such as by standardizing reservations, making agreements between vendors, and the like.

For example, the specification pre-agreed the identification of the extended carrier as the cell identity synchronized with it, or pre-agreed the extended carrier.

PCI is always 0. If the carrier information received by the user equipment 20 includes the configuration information of the reference symbol of the extended carrier, and does not include the identifier of the extended carrier, the identifier of the extended carrier may be determined in a manner pre-agreed by the specification.

For example, the configuration information specifying the reference symbol of the extension carrier in advance is port 0 of the CRS, or port 15 of the CSI-RS, or not. If the carrier information received by the user equipment 20 includes the identifier of the extended carrier and does not include the configuration information of the reference symbol of the extended carrier, the configuration information of the reference symbol of the extended carrier may be determined in a manner pre-agreed by the specification.

It should be noted that the configuration information of the reference symbols of the extension carrier and the identifier of the extension carrier are not limited to the above contents, and the configuration information of the reference symbols that can be used as the extension carrier and the identifier of the extension carrier can also be used as the present invention. Pre-agreed content of the embodiment.

The network side device in the embodiment of the present invention may be a station (such as a macro base station, a home base station, etc.), an RN (relay) device, or other network side devices.

As shown in FIG. 2, the network side device in the system for synchronizing the extended carrier in the embodiment of the present invention includes: a determining module 200 and a sending module 210.

a determining module 200, configured to determine carrier information of an extended carrier that needs to be configured for the user equipment, where the carrier information includes an identifier of the extended carrier and/or configuration information of a reference symbol of the extended carrier;

The sending module 210 is configured to send carrier information to the user equipment.

Preferably, after determining that the user equipment supports extended carrier synchronization or determining that the extended carrier is a synchronous extended carrier, the determining module 200 triggers the sending module 210 to send carrier information to the user equipment.

Preferably, if the extended carrier aggregation is required, the determining module 200, after determining that the user equipment supports the extended carrier aggregation, triggers the sending module 210 to send the carrier information to the user equipment.

Preferably, if the extended carrier measurement is required, the determining module 200, after determining that the user equipment supports the extended carrier measurement, triggers the sending module 210 to send the carrier information to the user equipment. Preferably, if the extension carrier is a synchronous extension carrier, the determining module 200 places the identifier of the synchronization cell corresponding to the extension carrier in the carrier information.

Preferably, the determining module 200 acquires carrier information of the extended carrier of the neighboring network side device through the X2 interface or the O&M device.

Preferably, in the handover process, if the network side device is the target network side device, and the target cell includes the extended carrier wave, the determining module 200 places the carrier information of the extended carrier in the handover command.

Preferably, if the carrier information does not include the configuration information of the reference symbol of the extension carrier, the determining module 200 determines the configuration information of the reference symbol of the extension carrier according to the preset setting;

If the carrier information does not include the identification of the extension carrier, the determination module 200 determines the identity of the extension carrier according to the preset. As shown in FIG. 3, the user equipment in the system for synchronizing the extended carrier in the embodiment of the present invention includes: a receiving module 300 and a processing module 310.

The receiving module 300 is configured to receive carrier information of an extended carrier from a network side, where the carrier information includes an identifier of the extended carrier and/or configuration information of a reference symbol of the extended carrier;

The processing module 310 is configured to perform downlink synchronization with the extended carrier according to the carrier information.

Preferably, the processing module 310 determines the extended carrier according to the identifier of the extended carrier, and performs downlink synchronization with the extended carrier according to the configuration information of the reference symbol.

Preferably, if the carrier information further includes: an identifier of the synchronization cell; the processing module 310 determines the synchronization cell according to the identifier of the synchronization cell, performs downlink synchronization with the synchronization cell, and completes synchronization with the extension carrier.

Preferably, after the processing module 310 performs downlink synchronization with the extension carrier, the extension carrier is measured according to the configuration information of the reference symbol.

Preferably, after the processing module 310 performs downlink synchronization with the extension carrier, carrier aggregation is performed on the extension carrier. Preferably, the processing module 310 uses the aggregation capability of the extended carrier and/or the measurement capability of the extended carrier in an explicit manner or an implicit manner based on the user equipment or based on the frequency band or based on the frequency band combination.

Preferably, if the carrier information does not include the configuration information of the reference symbol of the extension carrier, the processing module 310 determines the configuration information of the reference symbol of the extension carrier according to the preset setting;

If the carrier information does not include the identification of the extension carrier, the processing module 310 determines the identity of the extension carrier according to the preset. Based on the same inventive concept, a method for configuring an extended carrier is also provided in the embodiment of the present invention. The method for solving the problem is similar to the network side device in the system for synchronizing the extended carrier. Therefore, the implementation of these devices can be referred to the system and The implementation of the network side device will not be repeated here.

As shown in FIG. 4, the method for configuring an extended carrier in the embodiment of the present invention includes the following steps:

Step 401: The network side device determines carrier information of an extended carrier that needs to be configured for the user equipment, where the carrier information includes an identifier of the extended carrier and/or configuration information of a reference symbol of the extended carrier.

Step 402: The network side device sends carrier information to the user equipment. In the implementation, before the network side device sends the carrier information, it is also required to determine whether the user equipment can perform downlink synchronization of the extended carrier.

Specifically, the network side device sends carrier information after determining that the user equipment supports extended carrier synchronization.

In addition to the above manner, the network side device may further transmit carrier information after determining that the extension carrier is a synchronous extension carrier, because synchronization with the synchronization extension carrier is required to perform synchronization with the synchronization extension carrier.

Preferably, if the extended carrier aggregation is required, the network side device sends the carrier information to the user equipment after determining that the user equipment supports the extended carrier aggregation.

Preferably, if the extended carrier measurement is required, the network side device sends the carrier information to the user equipment after determining that the user equipment supports the extended carrier measurement.

The network side device may determine whether the user equipment supports one or more of synchronous extended carrier synchronization, extended carrier aggregation, and extended carrier measurement according to the capability of the user equipment, and may also determine the user according to the version number of the user equipment. Whether the device supports one or more of synchronous extended carrier synchronization, extended carrier aggregation, and extended carrier measurement.

In an implementation, the user equipment may use one of the synchronization capability of the extended carrier, the aggregation capability of the extended carrier, and the measurement capability of the extended carrier in an explicit manner or an implicit manner based on the user equipment or based on the frequency band or the frequency band combination. Kind or more.

Preferably, if the extension carrier is a synchronous extension carrier, the network side device places the identifier of the synchronization cell corresponding to the extension carrier in the carrier information.

In an implementation, the extension carrier may be an extension carrier of the neighboring network side device, and the network side device may obtain the carrier information of the extension carrier of the neighboring network side device by using the X2 interface or the O&M device.

Preferably, in the handover process, if the network side device is the target network side device, and the target cell includes the extended carrier wave, the network side device places the carrier information of the extended carrier in the handover command.

Specifically, if the carrier information does not include configuration information of the reference symbol of the extension carrier, the network side device determines configuration information of the reference symbol of the extension carrier according to a preset setting;

If the carrier information does not include the identifier of the extension carrier, the network side device determines the identifier of the extension carrier according to the preset setting. The pre-agreed manner in the embodiment of the present invention may be any manner that can ensure that the network side and the user equipment side maintain the same understanding of another parameter, such as by standardizing reservations, making agreements between vendors, and the like.

For example, the specification pre-arranges that the identifier of the extension carrier is the cell identifier synchronized with it, or the PCI of the extension carrier is always 0. For example, the configuration information specifying the reference symbol of the extension carrier in advance is port 0 of the CRS, or port 15 of the CSI-RS, or not.

Based on the same inventive concept, a method for synchronously expanding a carrier is also provided in the embodiment of the present invention. Since the principle of solving the problem is similar to the user equipment in the system for synchronizing the extended carrier, the implementation of the device can be referred to the system and the user. The implementation of the equipment, the repetition will not be repeated.

As shown in FIG. 5, the method for synchronously expanding a carrier according to an embodiment of the present invention includes the following steps:

Step 501: The user equipment receives carrier information of the extended carrier from the network side, where the carrier information includes an identifier of the extended carrier and/or configuration information of a reference symbol of the extended carrier.

Step 502: The user equipment performs downlink synchronization with the extended carrier according to the carrier information.

Preferably, before step 501, the method further includes:

The user equipment expands the aggregation capability of the carrier and/or the measurement capability of the extended carrier based on the user equipment or based on the frequency band or based on the frequency band combination, in an explicit manner or in an implicit manner.

Preferably, in step 502, the user equipment determines the extended carrier according to the identifier of the extended carrier, and performs downlink synchronization with the extended carrier according to the configuration information of the reference symbol.

Preferably, if the carrier information further includes: the identifier of the synchronization cell; in step 502, the user equipment determines the synchronization cell according to the identifier of the synchronization cell; performs downlink synchronization with the synchronization cell, and completes synchronization with the extension carrier.

Preferably, after step 502, the method further includes:

The user equipment measures the extended carrier according to the configuration information of the reference symbol.

Preferably, after step 502, the method further includes:

The user equipment performs carrier aggregation on the extended carrier.

Specifically, if the carrier information does not include the configuration information of the reference symbol of the extended carrier, the user equipment determines configuration information of the reference symbol of the extended carrier according to a preset setting;

If the carrier information does not include the identifier of the extended carrier, the user equipment determines the identifier of the extended carrier according to a preset setting.

For example, the specification pre-arranges that the identifier of the extension carrier is the cell identifier synchronized with it, or the PCI of the extension carrier is always 0. If the carrier information received by the user equipment includes the configuration information of the reference symbol of the extended carrier, the extension information is not included. To identify the carrier, the identity of the extended carrier can be determined in a manner pre-agreed by the specification.

For example, the configuration information specifying the reference symbol of the extension carrier in advance is port 0 of the CRS, or port 15 of the CSI-RS, or not. If the carrier information received by the user equipment includes the identifier of the extended carrier and does not include the configuration information of the reference symbol of the extended carrier, the configuration information of the reference symbol of the extended carrier may be determined in a manner pre-agreed by the specification.

4 and FIG. 5 may be combined into a process for forming a synchronous extension carrier, that is, steps 401 to 402 are performed first, and then steps 501 and 502 are performed.

The scheme of the present invention will be described below with four examples.

Example 1: The mobility measurement process of a synchronous extension carrier.

The base station acquires synchronization capability, measurement capability, and aggregation capability of the user equipment for the extended carrier. Whether the user equipment has the relevant capability may be pre-agreed (for example, the support extended carrier user equipment always supports the aggregate synchronous extension carrier and is measured by using CRS or CSI-RS), or may be reported by the user equipment to the base station, for example, the user equipment. Supports extended carrier aggregation, and can aggregate synchronous extension carriers and utilize CSI-RS for measurement.

Assume that the user equipment only transmits CSI-RS signals on the extended carrier that needs to be measured, and there are no PSS, SSS and CRS signals:

For the extended carrier measurement scenario in the same base station (for example, the measurement result is used to increase the extension carrier for aggregation or intra-base station handover), the base station performs measurement configuration for the user equipment, and the carrier information includes the frequency of the extended carrier to be measured and the PCI, A cell identifier (frequency point and PCI, or cell index) synchronized with the extension carrier and CSI-RS configuration information of the extension carrier. The cell identifier that is synchronized with the extended carrier may be a frequency point and a PCI, or a cell index. The cell index may be used only when the cell synchronized with the extended carrier is the current serving cell of the UE; After the information, the cell synchronized with the extended carrier is first found, and the downlink synchronization is performed, so that the downlink synchronization with the extended carrier is completed, and then the extended carrier is found and received according to the frequency of the extended carrier and the PCI, according to the CSI of the extended carrier. -RS configuration information, measuring its CSI-RS signal, and filtering to obtain corresponding measurement results, such as reference signal received power (RSRP).

For the extended carrier measurement scenario between different base stations (for example, the measurement result is used for inter-base station handover), the first time is to interact with the O2 device or the X2 interface, so that the base station obtains the carrier information of the extended carrier of the neighboring base station.

If the measurement result triggers the handover-related measurement report, the source base station may determine, according to the measurement result, that the user equipment performs handover. In the handover preparation process, the source base station requests the target base station to simultaneously switch the user equipment to the target base station by using an X2 message or an S1 message. On the common cell and the extended carrier, the handover preparation message includes the cell identifier (frequency point + PCI) measured by the user equipment and the signal shield amount, which is selected by the target base station. The target base station combines its own load condition with the user equipment. Measurement results and user equipment capabilities, etc., decide to switch the user equipment to the appropriate target cell. If the target cell includes a normal cell and an extended carrier, the handover command includes an identifier of the extended carrier and related configuration information.

Example 2: The mobility measurement process of the out-of-synchronous extension carrier.

The base station acquires the synchronization capability, measurement capability, and/or aggregation capability of the user equipment to the extended carrier. Whether the user equipment has the relevant capability may be agreed in advance, or may be reported by the user equipment to the base station. The user equipment in this embodiment may aggregate the extended carrier, and may aggregate the unsynchronized extended carrier, may perform the synchronization of the extended carrier through the CSI-RS, or perform the measurement of the extended carrier through the CSI-RS.

For the extended carrier measurement scenario in the same base station (for example, the measurement result is used to increase the extension carrier for aggregation or intra-base station handover), the base station performs measurement configuration for the user equipment, and the carrier information includes the frequency of the extended carrier to be measured and the PCI and CSI-RS configuration of the extension carrier. After receiving the carrier information, the user equipment completes downlink synchronization with the extended carrier through the frequency point, PCI, and CSI-RS signals, and measures the CSI-RS signal, and after filtering, obtains corresponding measurement results, such as RSRP.

If the measurement result triggers the handover-related measurement report, the source base station may determine, according to the measurement result, that the user equipment performs handover. In the handover preparation process, the source base station requests the target base station to simultaneously switch the user equipment by using an X2 message or an S1 message. On the common cell and the extension carrier, the handover preparation message includes the cell identifier (frequency point + PCI) and the signal shield amount measured by the user equipment, and is selected by the target base station. The target base station decides to switch the user equipment to the appropriate target cell based on its own load condition, the measurement result of the user equipment, and the user equipment capability. If the target cell includes a normal cell and an extension carrier, the handover command includes an identifier of the extension carrier and related configuration information.

If the user equipment transmits PSS or SSS and CRS-RS signals on the extension carrier that needs to be measured. Then, the user equipment performs downlink synchronization of the extended carrier through the PSS or the SSS, and performs measurement by using the CSI-RS. The rest of the process is the same as the above, and details are not described herein again.

If the user equipment sends CRS and CSI-RS signals on the extended carrier that needs to be measured, and there is no PSS and SSS signal, the user equipment performs downlink synchronization and measurement of the extended carrier through CRS or CSI-RS. The rest of the process is the same as above, and will not be described here.

Example 3: Carrier aggregation configuration process for synchronous extension carriers.

The base station acquires synchronization capability, measurement capability, and aggregation capability of the user equipment for the extended carrier. Whether the user equipment has the relevant capability may be agreed in advance, or may be reported by the user equipment to the base station. The user equipment in this embodiment can support extended carrier aggregation and can aggregate synchronous extension carriers.

It is assumed that the user equipment only transmits CSI-RS signals on the extension carrier that needs to be aggregated, without PSS, SSS and CRS. signal:

The base station performs carrier aggregation configuration for the user equipment, and is used for the user equipment to aggregate the synchronous extension carrier. The carrier information includes the frequency of the extended carrier to be aggregated and the PCI, and the cell identifier (frequency and PCI, or cell) synchronized with the extended carrier. Index ) and the CSI-RS configuration of the extension carrier. The cell identifier synchronized with the extended carrier may be a frequency point and a PCI, or a cell index, and the cell index may be used only when the cell synchronized with the extended carrier is the current serving cell of the UE. After receiving the carrier information, the user equipment aggregates the extended carriers for data transmission, that is, relies on downlink synchronization of the cell synchronized with the extended carrier, completes downlink synchronization with the extended carrier, and then finds the extended carrier according to the frequency of the extended carrier and the PCI. And receiving its signal, complete carrier aggregation of the extended carrier.

Example 4: Carrier aggregation configuration process for asynchronous carrier extensions.

The base station acquires synchronization capability, measurement capability, and aggregation capability of the user equipment for the extended carrier. Whether the user equipment has the relevant capability may be agreed in advance, or may be reported by the user equipment to the base station. The user equipment in this embodiment may aggregate the extension carriers, and may aggregate the unsynchronized extension carriers, and may perform the synchronization of the extension carriers through the CSI-RS.

Assume that the user equipment only transmits CSI-RS signals on the extended carriers that need to be aggregated, and there are no PSS, SSS and CRS signals:

The base station performs carrier aggregation configuration for the user equipment, and is used to enable the user equipment to aggregate the synchronous extension carrier. The carrier information includes the frequency of the extended carrier to be aggregated and the PCI and the CSI-RS configuration of the extended carrier. After receiving the carrier information, the user equipment aggregates the extended carriers for data transmission, that is, performs downlink synchronization with the extended carrier through the frequency point, PCI, and CSI-RS signals, and performs signal reception to complete carrier aggregation of the extended carrier.

If the user equipment sends CRS and CSI-RS signals on the extended carrier that needs to be measured, and there is no PSS/SSS signal, the user equipment performs downlink synchronization and measurement of the extended carrier through CRS or CSI-RS. The rest of the process is the same as above, and will not be described here.

The above method processing flow can be implemented by a software program, which can be stored in a storage medium shield, and when the stored software program is called, the above method steps are performed.

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

The present invention has been described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (system), and computer program products according to embodiments of the invention. It should be understood that each flow in the flowchart and/or block diagram can be implemented by computer program instructions. And/or blocks, and combinations of flows and/or blocks in the flowcharts and/or block diagrams. These computer program instructions can be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing device to produce a machine for the execution of instructions for execution by a processor of a computer or other programmable data processing device. Means for implementing the functions specified in one or more of the flow or in a block or blocks of the flow chart.

The computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device. The apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.

These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device. The instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.

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

It is apparent that those skilled in the art can make various modifications and variations to the invention without departing from the spirit and scope of the invention. Thus, it is intended that the present invention cover the modifications and modifications of the invention

Claims

Rights request

A method for configuring an extended carrier, the method comprising:

The network side device sends the carrier information to the user equipment.

2. The method according to claim 1, wherein before the network side device sends the carrier information to the user equipment, the method further includes:

The network side device determines that the user equipment supports extended carrier synchronization; or

The network side device determines that the extension carrier is a synchronous extension carrier.

The method of claim 2, wherein: if the carrier information needs to be transmitted, the network side device further includes:

The network side device determines that the user equipment supports extended carrier aggregation.

The method of claim 2, wherein: if the carrier information needs to be sent, the network side device further includes:

The network side device determines that the user equipment supports extended carrier measurement.

The method according to claim 1, wherein the identifier of the extension carrier is a frequency point of the extension carrier and a cell physical identifier PCI.

The method according to claim 1, wherein the determining, by the network side device, the carrier information of the extended carrier further includes:

And if the extension carrier is a synchronous extension carrier, the network side device places the identifier of the synchronization cell corresponding to the extension carrier in the carrier information.

The method according to claim 6, wherein the identifier of the synchronization cell is a frequency point and a PCI, or an extended universal mobile communication system terrestrial radio access network cell global identity ECGI, or a cell identity.

The method according to claim 1 or 6, wherein the determining, by the network side device, the carrier information of the extended carrier comprises:

The network side device acquires carrier information of the extended carrier of the neighboring network side device through the X2 interface or the operation and maintenance O&M device.

The method according to any one of claims 1 to 7, wherein the method further comprises:

In the handover process, if the network side device is a target network side device, and the target cell includes an extension carrier, the network side device places the carrier information of the extension carrier in a handover command.

If the carrier information does not include the configuration information of the reference symbol of the extended carrier, the network side device according to the pre- First, setting configuration information that determines a reference symbol of the extended carrier;

And determining, by the network side device, the identifier of the extended carrier according to a preset setting, if the carrier information does not include the identifier of the extended carrier.

A method for synchronously expanding a carrier, the method comprising:

The user equipment receives carrier information from an extension carrier of the network side, where the carrier information includes an identifier of the extended carrier and/or configuration information of a reference symbol of the extended carrier;

The method according to claim 11, wherein the downlink synchronization of the user equipment with the extension carrier comprises:

Determining, by the user equipment, the extended carrier according to the identifier of the extended carrier, and performing downlink synchronization with the extended carrier according to the configuration information of the reference symbol.

The method according to claim 11, wherein the carrier information further comprises: an identifier of the synchronization cell; and the downlink synchronization of the user equipment with the extension carrier includes:

Determining, by the user equipment, the synchronization cell according to the identifier of the synchronization cell;

The user equipment performs downlink synchronization with the synchronization cell to complete synchronization with the extended carrier.

The method of claim 11, wherein after the user equipment performs downlink synchronization with the extension carrier, the method further includes:

The user equipment performs measurement on the extended carrier according to configuration information of the reference symbol.

The method according to claim 13 or 14, wherein the reference symbol is a primary synchronization signal PSS or a secondary synchronization signal SSS or a common pilot signal CRS or a channel state information pilot signal CSI-RS.

The method according to any one of claims 11 to 14, wherein after the user equipment performs downlink synchronization with the extension carrier, the method further includes:

The user equipment performs carrier aggregation on the extended carrier.

The method according to any one of claims 11 to 14, wherein before the user equipment receives the carrier information, the method further includes:

The user equipment uses an aggregation capability of the extension carrier and/or a measurement capability of the extension carrier in an explicit manner or an implicit manner based on the user equipment or based on a frequency band or based on a frequency band combination.

The method according to any one of claims 11 to 14, wherein the method further comprises:

If the carrier information does not include the configuration information of the reference symbol of the extended carrier, the user equipment determines configuration information of the reference symbol of the extended carrier according to a preset setting;

And if the carrier information does not include the identifier of the extended carrier, the user equipment determines an identifier of the extended carrier according to a preset setting.

A network side device configured with an extended carrier, where the network side device includes: a determining module, configured to determine carrier information of an extended carrier that needs to be configured for the user equipment, where the carrier information includes an identifier of the extended carrier and/or configuration information of a reference symbol of the extended carrier;

The network side device according to claim 19, wherein the determining module is further configured to: after determining that the user equipment supports extended carrier synchronization or determining that the extended carrier is a synchronous extended carrier, triggering the The sending module sends the carrier information to the user equipment.

The network side device according to claim 20, wherein if the extended carrier aggregation is required, the determining module is further configured to:

After determining that the user equipment supports extended carrier aggregation, the sending module is triggered to send the carrier information to the user equipment.

The network side device according to claim 20, wherein if the extended carrier measurement is required, the determining module is further configured to:

After determining that the user equipment supports the extended carrier measurement, the sending module is triggered to send the carrier information to the user equipment.

The network side device according to claim 19, wherein the determining module is further configured to: if the extension carrier is a synchronous extension carrier, placing an identifier of a synchronization cell corresponding to the extension carrier in the In the carrier information.

The network side device according to claim 19 or 23, wherein the determining module is specifically configured to: obtain the carrier information of the extended carrier of the neighboring network side device by using the X2 interface or the operation and maintenance O&M device.

The network side device according to any one of claims 19 to 23, wherein the determining module is further configured to: if the network side device is a target network side device, and the target cell includes The carrier is extended, and the carrier information of the extended carrier is placed in the handover command.

The network side device according to any one of claims 19 to 23, wherein the determining module is further configured to: if the carrier information does not include configuration information of a reference symbol of the extended carrier, determine according to a preset setting Configuration information of the reference symbol of the extended carrier;

If the carrier information does not include the identifier of the extension carrier, the identifier of the extension carrier is determined according to a preset setting.

27. A user equipment for synchronizing an extended carrier, the user equipment comprising:

a receiving module, configured to receive carrier information of an extended carrier from a network side, where the carrier information includes an identifier of the extended carrier and/or configuration information of a reference symbol of the extended carrier;

The user equipment according to claim 27, wherein the processing module is specifically configured to: determine the extended carrier according to the identifier of the extended carrier, and according to configuration information of the reference symbol, The extended carrier is used for downlink synchronization.

The user equipment according to claim 27, wherein the carrier information further includes: an identifier of the synchronization cell; the processing module is specifically configured to:

Determining the synchronization cell according to the identifier of the synchronization cell, performing downlink synchronization with the synchronization cell, and completing synchronization with the extension carrier.

The user equipment according to claim 27, wherein the processing module is further configured to: after performing downlink synchronization with the extension carrier, perform measurement on the extension carrier according to configuration information of the reference symbol .

The user equipment according to any one of claims 27 to 30, wherein the processing module is further configured to perform carrier aggregation on the extension carrier after performing downlink synchronization with the extension carrier.

The user equipment according to any one of claims 27 to 30, wherein the processing module is further configured to: use an explicit or implicit method based on the user equipment or based on a frequency band or a frequency band combination. The aggregation capability of the extension carrier and/or the measurement capability of the extension carrier.

The user equipment according to any one of claims 27 to 30, wherein the processing module is further configured to: if the carrier information does not include configuration information of a reference symbol of the extended carrier, determine according to a preset setting Configuring configuration information of reference symbols of the extended carrier;

34. A system for synchronously expanding a carrier, the system comprising:

a network side device, configured to determine carrier information of an extended carrier that needs to be configured for the user equipment, and send the carrier information to the user equipment, where the carrier information includes an identifier of the extended carrier and/or the extended carrier Reference symbol configuration information;

And a user equipment, configured to receive carrier information of the extended carrier from the network side device, and perform downlink synchronization with the extended carrier according to the carrier information.