WO2012016515A1

WO2012016515A1 - Method and device for controlling ue carrier channel in multi-carrier system

Info

Publication number: WO2012016515A1
Application number: PCT/CN2011/077910
Authority: WO
Inventors: 陈东; 齐亮
Original assignee: 电信科学技术研究院
Priority date: 2010-08-02
Filing date: 2011-08-02
Publication date: 2012-02-09
Also published as: CN102348218A; CN102348218B

Abstract

Disclosed are a method and a device for controlling a UE carrier channel in a multi-carrier system. A UE receives a signal sent from a network side to determine the carrier channel that a working carrier is on, or the UE determines the carrier channel that the working carrier is on according to neighboring cell information sent from the network side, so that the UE uses the determined carrier channel to transmit and receive data. In the technical solutions of the present invention, by limiting the carrier channel where the working carrier is, a center frequency point of the UE is limited. In this way, a main carrier frequency is limited to the maximum extent within a receiving bandwidth of the UE, so as to provide conditions whereby frequency hopping does not occur when the UE performs measurement on cells, thereby shortening measurement time and improving handover performance.

Description

Method and device for controlling terminal carrier channel in multi-carrier system

The present invention relates to the field of communications, and in particular, to a method and apparatus for controlling a terminal carrier channel in a multi-carrier system. Background technique

LCR TDD (Low Chip Rate Time Division Duplex) The uplink and downlink of the system are shared channels, that is, all users share the same cell-level scrambling code, and different channels and spreading codes are used to distinguish different channels. User data, that is to say, in the case of non-space division, two users occupy the same code channel at the same time. This feature causes the UE (user equipment) in the Multi-Carrier High Speed Downlink Packet Access (MC-HSDPA) to get in a TTI (time transmission interval). The number of scheduled carriers may not be its maximum carrier capability, and the sum of the number of available carriers configured by the network may be less than the number of carriers of the UE when the UE is operating.

3GPP Release 7 introduces MC-HSDPA technology of LCR TDD, and introduces MC-HSUPA (Multi-Carrier High Speed Uplink Packet Access) technology in Release 10, and also requires MC-HSUPA-capable terminal. The MC-HSDPA capability must be supported. In the MC-HSDPA and MC-HSUPA systems, the UE will have the capability of uplink multiple downlink and over-receipt. The UE's transceiver capabilities defined in the current protocol are: 1TX1RX, 1TX3RX, 3Tx3Rx, 1TX6RX, 3Tx6Rx, and 6Tx6Rx, where Tx is the transmit carrier, Rx is the receive carrier, ΙΤχ indicates that it supports simultaneous transmission of up to 1 carrier, and lRx indicates support for simultaneous reception. 1 carrier.

The 3GPP Release 9 release introduces the TS0 optimization mechanism for LCR TDD. That is, before the mechanism is introduced, the LCR TDD cell is an N-frequency cell, and the TS0 of the primary carrier is broadcasted, and the TS0 of the secondary carrier is not used, and the UE can perform measurement at the time of TS0. After introducing this mechanism, The network can be configured to give the UE a reasonable measurement opportunity. The UE can use the TS0 of the secondary carrier to transmit the service, and perform the measurement on the neighboring cell in the measurement time without affecting the measurement and mobility. Therefore, the mechanism can be effective. Increase system capacity.

For MC-HSDPA and MC-HSUPA terminals, the downlink has multi-receiving capability, then there are some neighboring cells. Actually, the UE does not need to perform frequency hopping again to perform measurement, because these frequencies are already within the receiving bandwidth of the UE. Therefore, the TS0 optimization mechanism can be further optimized after multi-carrier introduction.

For the semi-static configuration of the working carrier of the network, since the number of carriers is smaller than the number of radio channels of the terminal, the working carrier can be anywhere in the radio channel, as shown in FIG.

For example, two consecutive carriers fl and f2 (fl<f2) are configured for the UE. At this time, the UE can use the channel 1 and the channel 2 to carry the carrier, and its center frequency is f2+2.4MHz (the single carrier bandwidth of the LCR TDD) For 1.6MHz, different system bandwidths are different.) You can also use channel 2 and channel 3 to carry fl and Ω, then the center frequency of the RF will become f2+0.8MHz. Similarly, channel 3 and channel 4, or channel 4 and channel 5, or channel 5 and channel 6 can also be used for bearer. In the existing protocol, the UE can choose at will.

If the frequency range of the primary carrier of the neighboring cell around the cell where the UE is located at this time is in the frequency range of f2+1.6MHz ~ f2+6.4MHz, or the primary carrier frequency belongs to the neighboring area within the range, then this The network should limit the UE to channel 1 and channel 2, so that channels 3 ~ 6 can cover most of the primary carriers with f2+1.6MHz ~ f2+6.4MHz neighbors, thereby reducing the UE's measurement of these neighbors. The number of hops. If there are more neighbors on the frequency of f 1 -6.4MHz ~ fl -1.6MHz around the cell where the UE is located at this time, then the network should limit the UE to channel 5 and channel 6, so that channels 1 ~ 4 can be covered. Most of the primary carriers are in the neighborhood of fl -6.4MHz ~ fl -1.6MHz, thereby reducing the frequency hopping times when the UE measures these neighbors. Similarly, if the working frequency of the main carrier of the surrounding neighboring area is mostly concentrated in the following frequencies: fl-1.6MHz, fl-3.2MHz, f2+1.6MHz, f2+3.2MHz, the network should limit the UE in Works on channel 3 and channel 4.

Of course, the above analysis is only from the perspective of downlink reception. The TDD system is the uplink and downlink common carrier (this is quite different from FDD (Frequency Division Duplex). The measurement of FDD only considers the downlink, and TDD. Need to consider both uplink and downlink), so the network limit Another principle of the UE's working frequency point is that the UE's working frequency point can simultaneously cover the uplink and downlink configured carriers to meet the normal transmission of data. In the above example, if the UE is also configured with an uplink carrier β (carrier adjacent to f2, β>Ω) for HSUPA transmission, the network should first satisfy the normal transmission and reception of fl, f2 and β, and then consider How to place these 3 carriers in the carrier channel can optimize the measurement.

However, in the existing mechanism, the network cannot limit the working frequency of the multi-carrier UE, and cannot limit the working frequency of the UE. The UE can freely use any working frequency point, that is, different carrier channels to transmit and receive data. Therefore, the measurement is optimized. The possibility. Summary of the invention

The present invention has been made in view of the above problems.

According to a first aspect of the present invention, a method for controlling a terminal carrier channel in a multi-carrier system is provided, wherein the terminal receives signaling sent by the network side to determine a carrier channel where the working carrier is located or a neighbor sent by the terminal according to the network side. The cell information determines a carrier channel in which the working carrier is located, so that the terminal transmits and receives data using the determined carrier channel.

The method includes: the network side sends a measurement control message to the terminal, and configures a neighbor cell list for the terminal; and the terminal determines, according to the pre-agreed rule, the carrier channel where the working carrier is located according to the measurement control message and the neighbor cell list, thereby making the bandwidth thereof Can cover the most neighboring cell primary carrier frequency.

Preferably, the terminal parses out the primary carrier frequency of the neighboring cells notified by all the networks, and traverses the correspondence between all the optional working carriers and the carrier channels, so as to determine a manner of selecting the primary carrier frequency of the neighboring cells. .

The method includes: the network side sends a signaling to the terminal to notify the relationship between the working carrier and the carrier channel; and the terminal sets the working carrier to the corresponding carrier channel according to the signaling.

Preferably, the signaling directly indicates the correspondence between the working carrier of the terminal and the carrier channel by configuring the center frequency of the terminal.

Preferably, the signaling only indicates the correspondence between a certain carrier and the terminal carrier channel.

Preferably, the signaling indicates the mapping relationship between the working carrier and the carrier channel in a bitmap manner. Preferably, before the network side sends signaling to the terminal, the network side determines that the working carrier belongs to The carrier channel ensures that both the uplink and downlink working carriers are located on the receiving and transmitting carrier channels of the terminal. Preferably, in the non-flattened network topology, the network side also notifies the base station of signaling, so that the scheduler of the base station knows which frequency points of the terminal do not need to be frequency hopped, and thus does not need to consider the measurement timing at these frequency points.

Preferably, the signaling is a measurement control message, a setup message or a reconfiguration message of the RRC signaling. Preferably, when the terminal has the function of turning off part of the carrier channel, after determining the carrier channel where the working carrier is located, the terminal is not used for transmission according to the RF channel configured on the network side and all frequencies of the neighboring cells in the cell list. Receive data and no carrier channel corresponding to the primary carrier frequency of the neighbor.

Preferably, when the terminal has the function of changing the radio frequency receiving bandwidth, after determining the carrier channel where the working carrier is located, the terminal determines, according to the channel indication configured by the network side, the channel that is not used for data transmission/reception and the frequency of the neighboring main carrier carrier. The corresponding carrier channel, thereby changing the center frequency and bandwidth of the terminal.

According to another aspect of the present invention, an apparatus for controlling a terminal carrier channel in a multi-carrier system is provided, wherein the apparatus determines a carrier channel in which a working carrier is located, so that the terminal transmits and receives data using the determined carrier channel. .

Preferably, the device is disposed in the terminal, and is configured to determine, according to a pre-agreed rule, a carrier channel where the working carrier is located according to the measurement control message and the neighbor cell list sent by the network side, so that the bandwidth can cover the most neighboring cell owners. Carrier frequency.

In this case, the device parses the primary carrier frequency of the neighboring cells notified by all the networks, and traverses the correspondence between all the optional working carriers and the carrier channels to determine the frequency of the primary carrier frequency of the most neighboring cells. Selected method.

Preferably, the device is disposed in the network side, configured to determine a carrier channel where the working carrier is located according to neighboring cell information around the cell where the terminal is located, and send signaling to the terminal to notify the relationship between the working carrier and the carrier channel. , so that the terminal obtains the carrier channel where the working carrier is located according to signaling.

Preferably, the signaling only indicates the correspondence between a certain carrier and the terminal carrier channel. Preferably, the signaling indicates the mapping relationship between the working carrier and the carrier channel in a bitmap manner. Preferably, before transmitting the signaling to the terminal, the device ensures that the uplink and downlink working carriers are located on the receiving and transmitting carrier channels of the terminal when determining the carrier channel to which the working carrier belongs.

Preferably, in the non-flattened network topology, the device also notifies the base station of the signaling, so that the scheduler of the base station knows which frequency points of the terminal do not need to be frequency hopped, and thus does not need to consider the measurement timing at these frequency points.

In the technical solution of the present invention, by limiting the carrier channel where the working carrier of the terminal is located, thereby limiting the center frequency of the UE, the primary carrier frequency of the neighboring cell can be maximized into the receiving bandwidth of the terminal, that is, The terminal provides conditions for not performing frequency hopping when making measurements of these cells, thereby shortening the measurement time and improving the switching performance.

Other features and advantages of the invention will be set forth in the description which follows, The objectives and other advantages of the invention will be realized and attained by the <RTI DRAWINGS

The drawings described herein are intended to provide a further understanding of the present invention, and are intended to be a part of the present invention, and the description of the present invention is not intended to limit the invention. In the drawing:

1 is a diagram showing a carrier channel and a center frequency point in the prior art; 2 is a flow chart showing a method according to a first embodiment of the present invention; and FIG. 3 is a flow chart showing a method according to a second embodiment of the present invention. detailed description

The invention provides a method for controlling a terminal carrier channel in a multi-carrier system. In the method, the terminal receives the signaling sent by the network side to determine the carrier channel where the working carrier is located or the terminal according to the neighbor cell information sent by the network side. A carrier channel in which the working carrier is located is determined such that the terminal transmits and receives data using the determined carrier channel.

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

First embodiment

The core idea of this embodiment is as follows: In a multi-carrier system, the network side directly or by cooperation with the terminal cooperates to achieve the purpose of controlling the terminal, so that the configured carrier is transmitted in a specific carrier channel, that is, its center frequency is controlled.

2 is a flow chart showing a method in accordance with a first embodiment of the present invention.

Referring to Figure 2, the method includes the following steps:

Step S202: The network side sends signaling to the terminal to limit the carrier channel where the terminal configures the carrier, or limit the center frequency of the radio. The network side first determines the carrier channel where the working carrier is located according to the neighbor cell information around the cell where the terminal is located, so as to signal the relationship between the terminal working carrier and the carrier channel in a signaling manner.

Here, the signaling is a measurement control message, a setup message, or a reconfiguration message of the RRC signaling, and the signaling may have the following indication manners:

Mode 1: Directly indicate the frequency value of the center frequency.

Mode 2: Indicate the carrier channel number of a certain carrier. Note that the carrier channel where other carriers are located can be obtained according to the relative frequency of the carrier, and the UE can know the center frequency.

For example, if the UE has 6 carrier channels, the network configures three carriers fl, f2, β (fl<f2<B) for the UE, and is placed in the carrier channels 2, 3, and 4, and can be indicated by the channel 2 in the fl. That is, the channel position of fl is indicated by indicating index=2, and then it is located in channel 3 according to the absolute frequency of f2 and β (already carried in configuration), its frequency relationship to fl, and the bandwidth of the carrier. And 4, in this case, the minimum number of bits required to indicate the channel.

Mode 3: Indicates the occupancy of each carrier channel by means of a bitmap. Specifically, the working carrier of the network configuration corresponds to the bit of the bitmap in a certain order, and the length of the bitmap may be a fixed length or may be corresponding according to the maximum number of carriers supported by each user. Taking the above 6 carriers as an example, fl, f2, and β need to be placed in channels 2, 3, and 4, and 6-bit bitmaps can be used to correspond to each channel respectively. The indication is "011100", 1 means the channel is occupied, 0 means The channel is idle, and then according to the frequency relationship, it can be seen that the three links "respectively correspond to the frequencies fl, Ώ and β respectively. The length of such a bitmap can be fixed 6 bits, and can also be set according to the carrier capability of each UE. The length of the bitmap.

It should be noted that the bit length required for this indication mode is slightly longer than that of the mode 2.

In addition, when the network specifies the carrier channel to which the working carrier belongs, the uplink and downlink working carriers should be located on the receiving and transmitting carrier channels of the terminal.

In addition, in the non-flattened network topology, the network side generally refers to the RNC, and at this time, the RNC needs to notify the base station by using the signaling (which can be notified by NBAP signaling), so that the scheduler of the base station can learn which UEs. The frequency can be skipped without frequency hopping, and can be continuously scheduled without using measurement timing.

Step S204: After receiving the signaling, the terminal determines the carrier channel to which the working carrier belongs, and sets the center frequency point according to the configuration, thereby performing data transmission/reception and measurement.

In this embodiment, the network side may cooperate with the terminal to perform the following two processes: When the terminal has the function of turning off part of the carrier channel, the terminal may according to the radio frequency channel configured by the network and all frequencies of the neighboring cells in the cell list. Turn off carrier channels that are not used to transmit/receive data (including upstream and downstream) and have no neighbor frequency. For example, the terminal does not have the function of changing the RF bandwidth, but can turn off the channel reception of the baseband. At this time, the terminal can close the channel that is not used for measuring and receiving data. Of course, the terminal can also measure, transmit, and receive. The unused channels are used to turn off the transmission and reception, or the channels that are not used for transmission are turned off.

When the terminal has the function of changing the radio frequency receiving bandwidth, the terminal may determine, according to the channel indication of the network configuration, that there is no channel for data transmission/reception (including uplink and downlink) and a corresponding carrier channel without the adjacent main carrier frequency, and further change the center. Frequency, making it meet network requirements. For example, the 6bitmap indication is 010000 and the working carrier is fl. At this time, the initial center frequency of the UE is fl+2.4. At this time, the frequency of all neighboring primary carriers in the neighbor list is only two frequencies of fl+3.2 and F1-1.6. At this time, the terminal judges that only carrier channels 1 to 4 (numbering from 1) can be used (carrier Channel 2 is used for data transmission/reception and measurement of the primary carrier in the local area (if the primary carrier in this area is also fl), carrier channel 1 and carrier channel 4 are used for measurement of the primary carrier of the neighboring cell, although carrier channel 3 does not, However, for a single RF chain radio, channel 3 cannot be turned off by changing the center frequency. Then the UE changes the center frequency to fl+0.8 and the bandwidth is changed to cover the bandwidth of 4 carriers.

Second embodiment

Figure 3 is a flow chart showing a method in accordance with a second embodiment of the present invention.

Referring to FIG. 3, the method of this embodiment includes the following steps:

Step S302: The network side sends a measurement control message to the terminal, and configures a neighbor cell list for the terminal.

Step S304, after receiving the measurement control message and the neighbor cell list, the terminal determines, according to the measurement control information and the neighbor cell list, the carrier channel where the working carrier is located according to a predetermined agreement, and adjusts the center working frequency point to make the bandwidth cover the most. The neighboring cell primary carrier frequency.

Specifically, the calculation method of the terminal may be: parsing the main carrier frequency of the neighboring area notified by all the networks to configure the working frequency, traversing all the optional working frequency points, and then determining a manner of covering the most neighboring cell main carrier frequency. .

Note that in this embodiment, for a terminal that can change the reception bandwidth and turn off the carrier channel, the processing of the terminal can be the same as the two processes performed by the network side and the terminal in the first embodiment described above.

The present invention also proposes an apparatus for controlling a terminal carrier channel in a multi-carrier system, wherein the apparatus determines a carrier channel in which the working carrier is located, so that the terminal transmits and receives data using the determined carrier channel.

The device may be disposed in the terminal, and configured to determine, according to a pre-agreed rule, a carrier channel where the working carrier is located according to the measurement control message and the neighbor cell list sent by the network side, so that the bandwidth can cover the most neighboring cell owners. Carrier frequency. In this case, the device parses the primary carrier frequency of the neighboring cells notified by all the networks, and traverses the correspondence between all the optional working carriers and the carrier channels to determine the frequency of the primary carrier frequency of the most neighboring cells. Selected the way.

In addition, the device may be further disposed in the network side, configured to determine, according to neighboring cell information around the cell where the terminal is located, a carrier channel where the working carrier is located, and send signaling to the terminal to notify the working carrier and the carrier channel. The relationship is such that the terminal obtains the carrier channel in which the working carrier is located according to the signaling. The signaling may take the three modes described above in the first embodiment, and it is a measurement control message, a setup message, or a reconfiguration message of the RRC signaling.

Before signaling to the terminal, the device ensures that the uplink and downlink working carriers are located on the receiving and transmitting carrier channels of the terminal when determining the carrier channel to which the working carrier belongs.

In addition, in the non-flattened network topology, the device also notifies the base station of the signaling, so that the scheduler of the base station knows which frequency points of the terminal do not need to be frequency hopped, and thus does not need to consider the measurement timing at these frequency points.

On the one hand, when the terminal has the function of turning off part of the carrier channel, after determining the carrier channel where the working carrier is located, the terminal is not used for transmission according to the RF channel configured on the network side and all frequencies of the neighboring cells in the cell list. Receive data and no carrier channel corresponding to the primary carrier frequency of the neighbor.

On the other hand, when the terminal has the function of changing the radio frequency receiving bandwidth, after determining the carrier channel where the working carrier is located, the terminal determines, according to the channel indication configured by the network side, the channel that is not used for data transmission/reception and the neighboring main carrier. The carrier channel corresponding to the frequency, thereby changing the center frequency and bandwidth of the terminal.

As described above, in the technical solution of the present invention, by limiting the center frequency of the terminal, the carrier channel where the working carrier of the UE is located is limited, and the primary carrier frequency of the neighboring cell can be maximized into the receiving bandwidth of the terminal. Therefore, the terminal provides conditions for not performing frequency hopping when making measurements of these cells, thereby shortening the measurement time and improving the switching performance.

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

Claims

Claim

A method for controlling a terminal carrier channel in a multi-carrier system, wherein the terminal receives signaling sent by the network side to determine a carrier channel where the working carrier is located or information about neighboring cells sent by the terminal according to the network side. A carrier channel in which the working carrier is located is determined to enable the terminal to transmit and receive data using the determined carrier channel.

The method according to claim 1, wherein the method includes: the network side sending a measurement control message to the terminal, and configuring a neighbor cell list for the terminal;

The terminal determines, according to the pre-agreed rule, the carrier channel where the working carrier is located according to the measurement control message and the neighbor cell list, so that the bandwidth can cover the most neighboring cell primary carrier frequency.

The method according to claim 2, wherein the terminal parses the primary carrier frequency of the neighboring cells notified by all the networks, and traverses the correspondence between all the optional working carriers and the carrier channels, thereby determining the coverage. One way of the primary carrier frequency of the neighboring cell is the selected mode.

The method according to claim 1, wherein the method comprises: the network side sending the signaling to the terminal to notify a relationship between a working carrier and a carrier channel;

The terminal sets the working carrier to the corresponding carrier channel according to the signaling.

The method according to claim 4, wherein the signaling directly indicates, or uses a bitmap, a working carrier and a carrier channel of the terminal by configuring a center frequency of the terminal. Correspondence relationship.

The method according to claim 4, wherein the signaling only indicates a correspondence between a working carrier and a terminal carrier channel.

The method according to claim 4, wherein in the non-flattened network topology, the network side further notifies the base station of the signaling, so that the scheduler of the base station knows the The frequency points of the terminal do not need to be frequency hopped, and thus the measurement timing is not considered at these frequency points.

8. The method according to claim 4, wherein the signaling is RRC signaling Measurement control messages, setup messages, or reconfiguration messages.

The method according to claim 2 or 4, wherein, when the terminal has the function of turning off part of the carrier channel, after determining the carrier channel where the working carrier is located, the terminal is configured according to the network side The RF channel and all frequencies of the neighbors in the cell list are turned off and are not used to transmit/receive data and have no carrier channel corresponding to the neighboring primary carrier frequency.

The method according to claim 2 or 4, wherein, when the terminal has a function of changing a radio frequency receiving bandwidth, after determining a carrier channel where the working carrier is located, the terminal is configured according to the network side The channel indication determines a channel that is not used for data transmission/reception and a carrier channel that does not have a neighboring primary carrier frequency, thereby changing the center frequency and bandwidth of the terminal.

11. Apparatus for controlling a terminal carrier channel in a multi-carrier system, wherein the apparatus determines a carrier channel in which the working carrier is located, such that the terminal transmits and receives data using the determined carrier channel.

12. Apparatus according to claim 11 wherein:

The device is disposed in the terminal, and is configured to determine, according to a pre-agreed rule, a carrier channel where the working carrier is located according to a measurement control message and a neighbor cell list sent by the network side, so that the bandwidth can cover the most neighboring cell primary carrier. frequency.

The device according to claim 12, wherein the device parses the primary carrier frequency of the neighboring cells notified by all the networks, and traverses the correspondence between all the optional working carriers and the carrier channels, thereby determining the coverage One way of the primary carrier frequency of the neighboring cell is the selected mode.

The device according to claim 11, wherein the device is disposed in a network side, and is configured to determine, according to neighboring cell information around a cell where the terminal is located, a carrier channel where the terminal working carrier is located, and The terminal sends signaling to notify the relationship between the working carrier and the carrier channel, so that the terminal obtains the carrier channel where the working carrier is located according to the signaling.

The device according to claim 14, wherein the signaling directly indicates, or uses a bitmap, a working carrier and a carrier channel of the terminal by configuring a center frequency of the terminal. Correspondence relationship.

16. The apparatus according to claim 14, wherein the signaling only indicates a certain Correspondence between the working carrier and the terminal carrier channel.

17. The apparatus according to claim 14, wherein in the non-flattened network topology, the apparatus further notifies the base station of the signaling, so that the scheduler of the base station learns the terminal Which frequency points do not need to be frequency hopped, and then the measurement timing is not considered at these frequencies.

18. The apparatus according to claim 14, wherein the signaling is a measurement control message, a setup message or a reconfiguration message of an RRC signaling.

The device according to claim 12 or 14, wherein, when the terminal has the function of turning off part of the carrier channel, after determining the carrier channel where the working carrier is located, the terminal is configured according to the network side The RF channel and all frequencies of the neighbors in the cell list are turned off and are not used to transmit/receive data and have no carrier channel corresponding to the neighboring primary carrier frequency.

The device according to claim 12 or 14, wherein, when the terminal has a function of changing a radio frequency receiving bandwidth, after determining a carrier channel where the working carrier is located, the terminal is configured according to the network side The channel indication determines a channel that is not used for data transmission/reception and a carrier channel that does not have a neighboring primary carrier frequency, thereby changing the center frequency and bandwidth of the terminal.