CN101064899A - Method for measuring adjacent cell and user terminal - Google Patents

Abstract

The invention disclose a method to measure the adjacent section, the method includes: A. determines the measuring type of target adjacent section; B. measuring the adjacent section according to the determined measuring type. The invention also discloses user terminal for measuring the adjacent section. The schedule accords with the variable real condition of bandwidth in the application environment of the third generation movable communication technique long evolution project (LTE), and it can measure the adjacent section in LTE system using the invention.

Description

A method and user terminal for measuring adjacent cells

technical field

The invention relates to the technical field of mobile communication, in particular to a method for measuring neighboring cells and a user terminal.

Background technique

With the development and popularization of personal digital terminals (PDAs) and notebook computers, and the increasingly powerful functions of mobile phones, mobile terminal users including PDAs, notebook computers and mobile phones hope to enjoy high-quality Internet services anytime and anywhere. A new mobile Broadband wireless access (MobileBroadband Wireless Access, MBWA) market is emerging. The MBWA market is a new market oriented to the convergence of fixed and mobile communications. It can provide broadband wireless access services in parallel with broadband wired fixed access and support mobile applications.

Currently, the most powerful competitors in the MBWA market are third-generation (3G) mobile communication technology and World Interoperability for Microwave Access (WIMAX) technology. WIMAX adopts fixed/mobile broadband wireless metropolitan area network technology. The core network is a standard IP network. The design of the physical layer and the Medium Access Control (MAC) layer of the wireless link takes into account bursty packet data services. It can adapt to the wireless channel environment, and the rate can reach dozens of megabits per second; the core network architecture of 3G mobile communication services is basically a cellular mobile communication network, and the download rate is below 100kbit/s. The 3G system supports IP data services The time-spectrum efficiency is low, and its connection-oriented fixed-bandwidth structure does not meet the demands of bursty IP data services. High-speed downlink packet access (HSDPA) and high-speed uplink packet access (HSUPA), known as 3.5G technology, can increase the download rate to more than 10Mbit/s, but HSDPA and HSUPA are constrained by the original system, and the performance is not ideal. In the MBWA market for a period of time, HSDPA and HSUPA will be at a disadvantage in competing with WIMAX.

In order to improve the competitiveness of 3G in the emerging MBWA market, the Third Generation Partnership Project (Three Generation Partnership Project, 3GPP) proposed and deployed the 3G Long Term Evolution (LTE) project. The goals of LTE mainly include the following:

(1) Support 1.25MHz～20MHz bandwidth, which greatly improves the peak data rate, for example, supports the peak rate of 100Mbps downlink and 50Mbps uplink under the bandwidth of 20MHz;

(2) While maintaining the position of the existing base station, the bit rate at the edge of the cell is increased, and the spectrum efficiency is effectively improved;

(3) Reduce the delay of the access network to less than 10ms; reduce the delay of the control plane to less than 100ms; optimize the performance of low-speed users below 15km/h, and provide high-performance services for mobile users of 15-120km/h , can support 120-350km/h users;

(4) The throughput, spectrum efficiency and mobility indicators will be fully guaranteed in a cell with a radius of 5km. When the cell radius increases to 30km, the above indicators will only be slightly weakened;

(5) Support multiple carrier bandwidths to meet the flexibility of narrowband spectrum allocation when configuring the system.

In practical applications, user equipment (UE) often needs to switch from a current serving cell to another cell with better signal quality to ensure communication quality. For this reason, cells with close physical locations are configured as neighboring cells in the communication system, and the UE needs to measure information of neighboring cells, and judge how to perform handover between neighboring cells according to the measured information.

In the existing 3G communication system, such as the Wideband Code Division Multiple Access (WCDMA) system, from the perspective of the carrier frequency used by the cell signal, the adjacent cell is divided into the same frequency adjacent cell and the different frequency adjacent cell . Among them, the definition of the adjacent cell with the same frequency is: the carrier frequency of the adjacent cell is the same as that of the serving cell and the UE can receive the necessary common channel information of the target adjacent cell without adjusting the receiver, then the adjacent cell is Neighboring cells of the same frequency; the definition of inter-frequency neighboring cells is: the carrier frequency of the neighboring cell is different from the carrier frequency of the serving cell and the UE must adjust the receiver to receive the necessary common channel information of the target neighboring cell, then the neighboring cell The cell is an inter-frequency adjacent cell. For all UEs in the same cell, the same-frequency neighbor cells and different-frequency neighbor cells are the same; for a UE, the measurement steps for the same-frequency neighbor cells or different-frequency neighbor cells are different: for same-frequency neighbor For a cell, the UE does not need to adjust the frequency of the receiver and can perform measurements while performing services; for adjacent cells with different frequencies, the UE needs to adjust the frequency of the receiver to measure it in the specified measurement slot, which is usually the network Uplink/Downlink Idle Periods (Up-Link/Down-Link Idle Periods) provided by the side. The same-frequency adjacent cell measurement is the measurement of the same-frequency adjacent cell information; the inter-frequency adjacent cell measurement is the measurement of the inter-frequency adjacent cell information.

The above division of same-frequency adjacent cells and different-frequency adjacent cells is based on whether the center frequencies of the own cell and adjacent cells are the same: for adjacent cells with the same center frequency, they are adjacent cells with the same frequency; otherwise, if the center carrier frequency If they are different, they are inter-frequency adjacent cells. However, in the LTE communication system, it is not possible to determine whether the adjacent cell is the same-frequency adjacent cell or a different-frequency adjacent cell based on whether the center frequency of the current cell and the adjacent cell is the same, nor can it be determined that the measurement of the adjacent cell is the same frequency The measurement is still an inter-frequency measurement. This is because in LTE, the transmission bandwidth of the cell can be the following values: 1.25/2.5/5/10/20MHz, and the minimum bandwidth capability of the UE is 10MHz, resulting in many measurement scenarios to be considered in LTE, for example described as follows:

As shown in Figure 1, Cell 1 and Cell 2 are set as adjacent cells, where the bandwidth of Cell 1 is 20 MHz, and the bandwidth of Cell 2 is 10 MHz. The center carrier frequencies of Cell 1 and Cell 2 differ by 5 MHz. UE1 and UE2 The serving cell is cell 1, and the serving cell of UE3 is cell 2. Then, according to the definition of the prior art: cell 1 and cell 2 are inter-frequency adjacent cells, and all UEs in cell 1 measure cell 2 as inter-frequency measurement. However, the analysis from the perspective of LTE is as follows: in the figure, the bandwidth capabilities of UE1, UE2 and UE3 are all 10MHz, and their current serving cell is cell 1. For UE1 and UE2, the receiver frequency needs to be adjusted to receive the signal of cell 2, so the measurement of cell 2 is inter-frequency measurement. But for UE3, the signal of cell 2 can be received without adjusting the receiver frequency, so the measurement of cell 2 is same-frequency measurement;

As shown in Figure 2, cell 1 and cell 2 are set as adjacent cells, wherein the bandwidth of cell 1 is 20MHz, the bandwidth of cell 2 is 10MHz, and the center carrier frequencies of cell 1 and cell 2 are the same, then according to the existing technology Definition of : Cell 1 and Cell 2 are co-frequency adjacent cells, and all UEs in Cell 1 measure Cell 2 as co-frequency measurements. However, the analysis from the perspective of LTE is as follows: in the figure, the bandwidth capabilities of UE1, UE2 and UE3 are all 10MHz, and their current serving cell is cell 1. For UE3, the signal of cell 2 can be received without adjusting the receiver frequency, so the measurement of cell 2 is still the same frequency measurement; for UE1 and UE2, the receiver frequency needs to be adjusted to receive cell 2 signal, so the measurement of Cell 2 is an inter-frequency measurement.

It can be seen from the above examples that the existing definitions of same-frequency adjacent cells and inter-frequency adjacent cells, intra-frequency measurement and inter-frequency measurement, and cell information measurement methods on this basis cannot meet the needs of LTE communication systems. Currently, there is no measurement method for neighboring cells of the LTE system.

Contents of the invention

In view of this, the purpose of the present invention is to propose a method for measuring neighboring cell information, which can meet the needs of measuring neighboring cells in the LTE communication system. The method comprises the steps of:

A. Determine the measurement type of the target neighboring cell;

B. Measure the target neighboring cell according to the determined measurement type.

The determination of the measurement type adopts any of the following methods:

A1. Determine the measurement type of the target neighboring cell according to the bandwidth capability of the user terminal UE, the current operating frequency band of the UE, the center frequency of the target neighboring cell, and the frequency band information or any combination of the above information;

A2. Determine the measurement type of the target adjacent cell according to the bandwidth capability of the user terminal UE, the current operating frequency band of the UE, the center frequency of the target adjacent cell, and the frequency band information or any combination of the above information, and the measurement type indicated by the network side;

A3. Determine the measurement type of the target neighboring cell according to the neighboring cell information stored on the UE side;

A4. Determine the measurement type of the target neighboring cell according to the bandwidth capability of the user terminal UE and/or the center frequency and frequency band information of the target neighboring cell.

Method A3 includes: the UE stores the measured neighbor cell information and the corresponding measurement type; the UE searches for the target neighbor cell information in the stored neighbor cell information, and uses the measurement type corresponding to the found target neighbor cell information as The measurement type of the target neighbor cell.

Determine the measurement type according to the method A1 or A4, then the measurement according to the measurement type includes:

B11. If the determined measurement type is intra-frequency measurement, the UE performs intra-frequency measurement; otherwise, perform step B12;

B12. If the determined measurement type is inter-frequency measurement, the UE performs inter-frequency measurement according to the measurement gap indicated by the network side.

Described step B12 comprises:

B12a, the UE reports a measurement request to the network side;

B12b. The network side instructs the UE to perform inter-frequency measurement measurement gaps; after receiving the message, the UE performs inter-frequency measurement according to the measurement gaps indicated by the network side.

The measurement request includes: neighboring cell information, bandwidth capability of the UE, current working frequency band of the UE, or any combination of the above contents.

The measurement type is determined according to the method A2, and the measurement type issued by the network side is intra-frequency measurement, then the measurement according to the measurement type of the cell is:

B21. If the determined measurement type is intra-frequency measurement, the UE performs intra-frequency measurement on neighboring cells, and executes step B22 after the measurement is completed; if the determined measurement type is inter-frequency measurement, then directly executes step B22;

B22. Determine whether there are unmeasured neighboring cells in the neighboring cell list, and if so, go to step A; otherwise, end the processing flow.

The measurement type is determined according to the method A2, and the measurement type issued by the network side is inter-frequency measurement, then the measurement according to the measurement type of the cell is:

B31. If the determined measurement type is inter-frequency measurement, the UE performs inter-frequency measurement on neighboring cells according to the measurement instruction, and executes step B32 after the measurement is completed; if the determined measurement type is intra-frequency measurement, then directly executes step B32;

B32. Determine whether there are unmeasured neighboring cells in the neighboring cell list, and if so, go to step A; otherwise, end the processing flow.

Before determining the measurement type of the target neighboring cell, it further includes:

AA1. The network sends the neighbor cell information to the UE;

AA2. The UE selects a neighboring cell as the target neighboring cell according to the received neighboring cell information.

Step AA1 further includes: the network side delivers the measurement gap and/or the measurement parameters to the UE.

The message is a system message or a dedicated measurement control message.

Before determining the measurement type of the target neighboring cell, it further includes:

The network side selects a neighboring cell of the UE as the target neighboring cell.

The measurement type includes intra-frequency measurement and inter-frequency measurement, the intra-frequency measurement is a measurement performed by the UE without adjusting the receiver frequency, and the inter-frequency measurement is a measurement performed by the UE to adjust the receiver frequency.

The cell is a cell of the third generation mobile communication technology Long Term Evolution project LTE.

The purpose of the present invention is also to provide a user terminal for measuring adjacent cells, which can meet the needs of measuring adjacent cells in the LTE communication system. The user terminal includes:

A measurement type determination module, configured to determine the type of measurement of the target neighboring cell;

The measurement module is configured to measure the target neighboring cell according to the measurement type determined by the measurement type determination module, and according to the measurement parameters.

The measurement type determination module is further configured to send an inter-frequency measurement request for requesting a measurement gap to the network side through the transceiver module.

The measurement module is further used to determine measurement parameters.

The user terminal further includes a transceiver module, configured to receive a system message or a dedicated measurement control message sent from the network side for indicating measurement, and send the received message to the measurement type determination module.

The measurement module further includes a parameter saving module, which is used to save the neighboring cell information and the corresponding measurement type, and delete the saved neighboring cell information and the corresponding measurement type when the UE changes the current cell.

The measurement module further includes a judging module, which is used to judge whether the measurement of all neighboring cells has been completed, and the measuring module measures the target neighboring cells according to the judging result.

The judging module is further used to judge whether the target neighboring cell can be measured according to the measurement type in the message received by the transceiver module, and if so, the measuring module measures the target neighboring cell.

It can be seen from the above technical solutions that the present invention determines the measurement of the target neighboring cell according to the UE bandwidth capability, the operating frequency band of the UE, the center frequency of the target neighboring cell to be measured, the frequency band information of the target neighboring cell, or any combination of the above information. Whether the same-frequency measurement or the different-frequency measurement is in line with the actual situation that the bandwidth of the cell is variable in the LTE application environment, so the method of the present invention can be used to realize the measurement of the neighboring cells of the LTE system.

Description of drawings

Fig. 1 is a schematic diagram of a situation in which the center frequencies of adjacent cells are different in LTE;

Fig. 2 is a schematic diagram of a situation in which the center frequencies of adjacent cells are the same in LTE;

FIG. 3 is a schematic diagram of a measurement scenario in LTE;

FIG. 4 is a flow chart of the measurement type included in the message sent by the network side in Embodiment 1 of the present invention, wherein step 302a is the first case;

FIG. 5 is a flowchart of the measurement type included in the message sent by the network side in Embodiment 1 of the present invention, wherein step 302a is the second case;

FIG. 6 is a flowchart of Embodiment 2 of the present invention;

FIG. 7 is a flowchart of Embodiment 3 of the present invention;

FIG. 8 is a flowchart of Embodiment 4 of the present invention;

FIG. 9 is a schematic structural diagram of a user terminal according to Embodiment 1 of the present invention.

Detailed ways

In order to make the purpose, technical solution and advantages of the present invention clearer, the present invention will be further elaborated below in conjunction with the accompanying drawings.

According to the previous analysis, the division of intra-frequency measurement and inter-frequency measurement in LTE needs to consider the center frequency of adjacent cells, the frequency band information of adjacent cells, the bandwidth capability of UE, the operating frequency band of UE, or any combination of the above information. The so-called working frequency band reflects the frequency and/or bandwidth of the UE's current work. The working frequency band can be represented by the lower limit frequency and the upper limit frequency. For example, the lower limit frequency is 2120MHz, and the upper limit frequency is 2130MHz. Frequency + bandwidth representation, for example, the working frequency band of the above example can be expressed as: center frequency 2125MHz, bandwidth 10MHz. If the network side indicates the measurement type, the UE may determine the measurement type to be adopted in combination with the indicated measurement type.

For this reason, the definition suitable for LTE application environment is re-given for intra-frequency measurement and inter-frequency measurement:

Intra-frequency measurement: The UE can receive the necessary common channel information of the target adjacent cell without adjusting the frequency of the receiver, so the measurement of the target adjacent cell by the UE is an intra-frequency measurement, and the target adjacent cell is the same frequency of the UE Neighboring cells; according to the feature that no measurement gap is required during measurement, this measurement method is also called non-gap assisted measurement.

In LTE, the carrier center frequency of the co-frequency adjacent cell and the carrier center frequency of the serving cell where the UE is located may be the same or different. If they are the same, it is obvious that the UE can perform co-frequency measurement on neighboring cells, including 3 situations, please refer to (1), (2), and (3); if they are different, also include 3 situations, please refer to (4) , (5), (6):

(1) The bandwidth capability of the UE is equal to the transmission bandwidth of the neighboring cell, that is, the case where UE1 measures cell 2 as shown in Figure 3: the carrier frequencies of cell 1 and cell 2 are the same, the bandwidth capability of UE1 is 20MHz, and the transmission bandwidth of cell 2 is 20MHz. The serving cell of UE2 is cell 1. In this case, UE2 can receive the common channel information of cell 5 without adjusting the receiver. Therefore, UE2's measurement of cell 5 is same-frequency adjacent cell measurement or same-frequency measurement. Cell 5 is a co-frequency neighbor cell of UE2;

(2) The bandwidth capability of the UE is smaller than the transmission bandwidth of the adjacent cell, that is, the situation in which UE3 measures cell 2 as shown in Figure 3: the carrier frequencies of cell 1 and cell 2 are the same, the bandwidth capability of UE3 is 10MHz, and the transmission bandwidth of cell 2 is 20MHz. The serving cell of UE3 is cell 1. In this case, UE3 can receive the common channel information of cell 2 without adjusting the receiver. Therefore, the UE3's measurement of the cell 2 is the same-frequency adjacent cell measurement or the same-frequency measurement. Cell 2 is the same-frequency neighbor cell of UE3;

(3) The bandwidth capability of the UE is greater than the transmission bandwidth of the adjacent cell, that is, the situation in which UE1 measures cell 3 as shown in Figure 3: the carrier frequencies of cell 1 and cell 2 are the same, the bandwidth capability of UE1 is 20 MHz, and the transmission bandwidth of cell 3 is 10MHz. The serving cell of UE1 is cell 1. In this case, UE1 can receive the common channel information of cell 3 without adjusting the receiver. Therefore, UE1's measurement of cell 3 is same-frequency adjacent cell measurement or same-frequency measurement. Cell 3 is a co-frequency neighboring cell of UE1.

(4) The bandwidth capability of the UE is equal to the transmission bandwidth of the adjacent cell, that is, the situation in which UE2 measures cell 5 as shown in Figure 3: the carrier frequencies of cell 1 and cell 5 are different, the bandwidth capability of UE2 is 10 MHz, and the transmission bandwidth of cell 5 is 10MHz. The serving cell of UE2 is cell 1. In this case, UE2 can receive the common channel information of cell 5 without adjusting the receiver. Therefore, UE2's measurement of cell 5 is same-frequency adjacent cell measurement or same-frequency measurement. Cell 5 is a co-frequency neighbor cell of UE2;

(5) The bandwidth capability of the UE is smaller than the transmission bandwidth of the adjacent cell, that is, the situation of UE4 measuring cell 1 as shown in Figure 3: the carrier frequencies of cell 1 and cell 7 are different, the bandwidth capability of UE4 is 10MHz, and the transmission bandwidth of cell 1 is 20MHz. The serving cell of UE4 is cell 7. In this case, UE4 can receive the common channel information of cell 1 without adjusting the receiver. Therefore, UE4's measurement of cell 1 is same-frequency adjacent cell measurement or same-frequency measurement. Cell 1 is the same-frequency neighbor cell of UE1;

(6) The bandwidth capability of the UE is greater than the transmission bandwidth of the adjacent cell, that is, the situation in which UE2 measures cell 6 as shown in Figure 3: the carrier frequencies of cell 1 and cell 6 are different, the bandwidth capability of UE2 is 10MHz, and the transmission bandwidth of cell 6 is 5MHz. The serving cell of UE2 is cell 1. In this case, UE2 can receive the common channel information of cell 6 without adjusting the receiver. Therefore, UE2's measurement of cell 6 is same-frequency adjacent cell measurement or same-frequency measurement. Cell 6 is a co-frequency neighboring cell of UE2.

Inter-frequency measurement: The UE needs to adjust the frequency of the receiver to receive the necessary common channel information of the target adjacent cell, so the UE's measurement of the target adjacent cell is an inter-frequency measurement, and the target adjacent cell is the UE's inter-frequency Neighboring cells: According to the feature that measurement needs to be performed according to the measurement gap during measurement, this measurement method is also called gap assisted measurement.

The carrier center frequency of the inter-frequency adjacent cell and the carrier center frequency of the serving cell where the UE is located can be the same or different. If they are different, it is obvious that the UE can perform inter-frequency measurement on the adjacent cell. There are 3 cases, please refer to (1) , (2), (3); if the same, also include 3 cases, please refer to (4), (5), (6):

(1) The bandwidth capability of the UE is equal to the transmission bandwidth of the adjacent cell, that is, the situation in which UE3 measures cell 5 as shown in Figure 3: the carrier frequencies of cell 1 and cell 5 are different, the bandwidth capability of UE3 is 10MHz, and the transmission bandwidth of cell 5 is 10MHz. The serving cell of UE3 is cell 1. In this case, UE3 needs to adjust the receiver to receive the common channel information of cell 5. Therefore, UE3's measurement of cell 5 is inter-frequency adjacent cell measurement. Cell 5 is an inter-frequency neighbor cell of UE3;

(2) The bandwidth capability of the UE is smaller than the transmission bandwidth of the adjacent cell, that is, the situation in which UE3 measures cell 7 as shown in Figure 3: the carrier frequencies of cell 1 and cell 7 are the same, the bandwidth capability of UE3 is 10MHz, and the transmission bandwidth of cell 7 is 20MHz. The serving cell of UE3 is cell 1. In this case, UE3 needs to adjust the receiver to receive the common channel information of cell 7. Therefore, UE3's measurement of cell 7 is inter-frequency neighbor cell measurement. Cell 7 is an inter-frequency neighbor cell of UE3;

(3) The bandwidth capability of the UE is greater than the transmission bandwidth of the neighboring cell, which is the case of UE4 measuring cell 6 as shown in Figure 3: the carrier frequencies of cell 6 and cell 7 are different, the bandwidth capability of UE4 is 10MHz, and the transmission bandwidth of cell 6 is 5MHz. The serving cell of UE4 is cell 7. In this case, UE4 needs to adjust the receiver to receive the common channel information of cell 6. Therefore, UE4's measurement of cell 6 is inter-frequency adjacent cell measurement. Cell 6 is an inter-frequency neighbor cell of UE4.

(4) The bandwidth capability of the UE is equal to the transmission bandwidth of the adjacent cell, that is, the situation in which UE2 measures cell 3 as shown in Figure 3: the carrier frequencies of cell 1 and cell 3 are the same, the bandwidth capability of UE2 is 10MHz, and the transmission bandwidth of cell 3 is 10MHz. The serving cell of UE2 is cell 1. In this case, UE2 needs to adjust the receiver to receive the common channel information of cell 3. Therefore, UE2's measurement of cell 3 is inter-frequency adjacent cell measurement. Cell 3 is an inter-frequency neighboring cell of UE2;

(5) The bandwidth capability of the UE is smaller than the transmission bandwidth of the adjacent cell, that is, the situation where UE2 measures cell 2 as shown in Figure 3: the carrier frequencies of cell 1 and cell 2 are the same, the bandwidth capability of UE2 is 10MHz, and the transmission bandwidth of cell 2 is 20MHz. The serving cell of UE2 is cell 1. In this case, UE2 needs to adjust the receiver to receive the common channel information of cell 2. Therefore, UE2's measurement of cell 2 is inter-frequency adjacent cell measurement. Cell 2 is an inter-frequency neighboring cell of UE2;

(6) The bandwidth capability of the UE is greater than the transmission bandwidth of the adjacent cell, that is, the situation in which UE2 measures cell 4 as shown in Figure 3: the carrier frequencies of cell 1 and cell 4 are the same, the bandwidth capability of UE2 is 10MHz, and the transmission bandwidth of cell 4 is 5MHz. The serving cell of UE2 is cell 1. In this case, UE2 needs to adjust the receiver to receive the common channel information of cell 4. Therefore, UE2's measurement of cell 4 is inter-frequency adjacent cell measurement. Cell 4 is an inter-frequency neighbor cell of UE2.

According to the above analysis, the solution of the present invention will be further described below with four specific examples.

Embodiment 1: The process flow of this embodiment is shown in Figure 4 or Figure 5, including the following steps:

Step 401: The network side sends a system message or a dedicated measurement control message. The message includes but is not limited to the measurement type, measurement parameters, neighbor cell information or any combination of the above information. The message may also include measurement gap information. The information is mainly to tell the measurement gap for performing inter-frequency measurement; where the measurement type includes intra-frequency measurement or inter-frequency measurement, and the measurement parameters can be Es/Io, etc. The information of neighboring cells includes but is not limited to: cell identity, frequency band of the cell information, the center frequency of the cell, or any combination of the above information. The frequency band information of the cell reflects the bandwidth of the cell, which can be represented by upper and lower limit frequencies, or directly by bandwidth. For example, if the center frequency of the cell is 2122.5MHz and the transmission bandwidth is 5MHz, the frequency band information may be represented by 2120MHz or 2125MHz, or by 5MHz, or by 2120MHz and 2125MHz. The adjacent cell information may not distinguish between adjacent cells, and may also distinguish between same-frequency adjacent cells and different-frequency adjacent cells. Here, the same-frequency adjacent cell means that the center frequency of the cell is the same as the center frequency of the cell where the UE is located, and the different frequency The adjacent cell means that the center frequency of the cell is different from the center frequency of the cell where the UE is located.

Here, the message sent by the network side is compatible with the network side message of the prior art. Since the network side does not know the bandwidth capability of the UE, the division of the same-frequency adjacent cells and different-frequency adjacent cells has no guiding significance for UE measurement. After receiving the message, it is still necessary to distinguish whether the adjacent cell is the same-frequency adjacent cell or an inter-frequency adjacent cell. In order to distinguish from the actual same-frequency neighboring cells and different-frequency neighboring cells, the same-frequency neighboring cells and different-frequency neighboring cells divided according to whether the center frequency of the cell is the same as the center frequency of the cell where the UE is located are called pseudo-same-frequency neighboring cells, respectively. Adjacent cells and pseudo inter-frequency adjacent cells.

Step 402: If the UE is currently in the idle state, the UE measures the signal of the current serving cell, and if the measurement result satisfies specific conditions or criteria, it starts the neighbor cell according to the received system message or dedicated measurement control message Measurement.

The specific condition or criterion usually indicates that the signal quality of the current serving cell is not good, the UE may leave the current serving cell or other situations that require cell switching/reselection, for example, the specific condition is that the measurement result is less than a preset Threshold value; the present invention does not limit the specific content of the specific conditions or criteria. Or, after receiving a system message or a dedicated measurement control message, the UE does not measure the signal of the current serving cell but directly starts the measurement of the neighboring cell. In this case, the network side usually instructs the UE to perform measurement.

If the UE is in a non-idle state, the UE starts the measurement of neighboring cells according to the received system message or dedicated measurement control message.

Said starting the measurement of neighboring cells further includes:

Step 402a: The UE selects one of the neighbor cells described in the neighbor cell list in the received system message or dedicated measurement control message as the target neighbor cell, and the UE may perform the following behaviors:

1. Check whether the measurement type and measurement parameters of the target neighboring cell have been saved, if so, measure the target neighboring cell according to the saved measurement type and measurement parameters; otherwise, go to step 402b, which is The situation shown in 4;

2. Do not check whether to save the measurement type and measurement parameters of the target neighboring cell, go to step 402b, which is the situation shown in Figure 5;

Step 402b: The UE judges whether it can perform measurement according to the measurement type indicated by the network side according to its own bandwidth capability, the frequency band it is in, the center frequency of the target neighboring cell, the frequency band information of the target neighboring cell, or any combination of the above information, and if so, perform the measurement, Otherwise, continue to measure the next neighboring cell or end the measurement.

This step is specifically divided into the following situations:

Case 1: The network side instructs to perform co-frequency measurement, and the UE determines that the target neighboring cell can perform co-frequency measurement, then the UE performs co-frequency measurement on the neighboring cell;

Case 2: The network side indicates inter-frequency measurement and does not indicate the frequency band of the target neighboring cell for measurement, and the UE determines that the target neighboring cell can perform inter-frequency measurement, then the UE performs inter-frequency measurement on the neighboring cell;

Case 3: The network side instructs inter-frequency measurement and indicates the frequency band of the target adjacent cell for measurement, and the UE judges whether the indicated frequency band can perform inter-frequency measurement, and if it is possible, the UE performs inter-frequency measurement on the indicated target adjacent cell;

Situation 4: The network side instructs to perform intra-frequency measurement, and the UE determines that intra-frequency measurement cannot be performed, or if the network side instructs to perform inter-frequency measurement, and the UE determines that inter-frequency measurement cannot be performed, then the UE does not perform measurement on the target neighboring cell, Continue to measure the next neighbor cell, if there is no next neighbor cell, then end the measurement.

402c. The UE checks whether the measurement of all neighboring cells described in the received system message or the neighboring cell information in the dedicated measurement control message has been completed. If yes, end the measurement; otherwise, go to step 402a;

The saved measurement type and measurement parameters have no guiding significance for UE measurement after the UE changes the serving cell, so the saved measurement type and measurement parameters can be deleted after the UE changes the serving cell.

In the above steps of this embodiment, for the measurement type issued by the network side, the UE needs to make an independent judgment before performing the measurement; the network side may not indicate the measurement type, and the UE directly judges whether it is the same-frequency measurement or different-frequency measurement , as described below:

Wherein, the system message or the dedicated measurement control message mentioned in step 401 may not include the measurement type, but only include the information of neighboring cells, and the message may also include measurement gap information, which is mainly to tell the measurement gap for inter-frequency measurement ;

Then step 402b is: UE judges whether the measurement of the cell is intra-frequency measurement or inter-frequency measurement according to its own bandwidth capability, working frequency band, center frequency of the target neighboring cell, frequency band information of the target neighboring cell or any combination of the above information.

This step is specifically divided into the following situations:

Case 1: The UE determines that the target neighboring cell can perform co-frequency measurement, that is to say, the UE can measure the target neighboring cell when it is in the current working frequency band, and then the UE performs co-frequency measurement on the target neighboring cell;

Case 2: The UE determines that the target neighboring cell can perform inter-frequency measurement, that is to say, the UE needs to adjust the working frequency band to measure the target neighboring cell, then the UE reports the information of the target neighboring cell on the network side and requests inter-frequency measurement; then After the network side receives the message, it determines the time slot for UE measurement, and sends the message to the UE. After receiving the message, the UE performs inter-frequency measurement of neighboring cells in the required time slot according to the instructions of the network side;

Situation 3: The UE can perform intra-frequency measurement or inter-frequency measurement after determining the target neighboring cell. At this time, the default is to select the same-frequency measurement first. Of course, it does not rule out that the UE reports this situation to the network side, and then the network side instructs the UE In the case of inter-frequency measurement, the processing method of this case is the same as that of case 2.

Embodiment 2: The network side knows the bandwidth capability of the UE, and the network side determines the specific measurement type and instructs the UE to perform the measurement according to the information of neighboring cells and the bandwidth capability of the UE.

The process flow of this embodiment is shown in Figure 6, including the following steps:

Step 601: The network side determines the measurement type according to the operating frequency band of the UE, the bandwidth capability of the UE, the center frequency of the adjacent cell of the UE, frequency band information or any combination of the above information. There may be multiple neighboring cells of the UE, and the network side needs to determine the measurement type for each neighboring cell. The specific process is as follows:

First select a neighboring cell as the target neighboring cell, and determine whether the UE can perform intra-frequency measurement on the selected target neighboring cell. If yes, determine the measurement type of the UE as intra-frequency measurement; if not, determine the measurement type of the UE For inter-frequency measurement;

After completing the above operation on one neighbor cell in the cell list, the network side selects another neighbor cell in the cell list to continue the above operation until the measurement type is determined for all neighbor cells in the cell list, then step 602 is executed.

Step 602: The network side sends a dedicated measurement control message, which includes but not limited to the information of each neighboring cell selected by the network side in step 601 and the measurement type of the neighboring cell. Since the UE may save the information of the neighboring cells that have been measured, the dedicated measurement control message does not necessarily send the entire content of the neighboring cell information to the UE every time. The neighboring cell information included in the dedicated measurement control message Including but not limited to: neighboring cell identity, frequency band information, center frequency of neighboring cells or any combination of the above information.

Step 603: The UE performs measurement on neighboring cells according to the measurement type in the received dedicated measurement control message.

Embodiment 3: The network side instructs the UE to perform co-frequency measurement, and determines the measurement type according to the operating frequency band of the UE, the bandwidth capability of the UE, the center frequency of the neighboring cell, the frequency band information of the neighboring cell, or any combination of the above information. The same-frequency neighbor cell information measured on the same frequency.

The process of this embodiment is shown in Figure 7, including the following steps:

Step 701: The network side first selects a target neighboring cell based on the known neighboring cells of the cell where the UE is located, and judges whether the UE can perform a target neighboring cell based on the bandwidth capability of the UE, the current operating frequency band of the UE, and the information of the target neighboring cell. For co-frequency measurement, if possible, add the information of co-frequency neighboring cells, and continue to judge the next neighboring cell, if not, continue to judge the next neighboring cell, if there is no next neighboring cell, then end the judgment.

Step 702: The network side sends a dedicated measurement control message, which includes but not limited to the information of each intra-frequency neighbor cell selected by the network side in step 701 and the measurement type of the neighbor cell is intra-frequency measurement. The adjacent cell information includes, but is not limited to: frequency band information and/or center frequency of adjacent cells.

Step 703: The UE performs intra-frequency measurement on the intra-frequency neighboring cells according to the indication in the received dedicated measurement control message.

Embodiment 4: The network side instructs the UE to perform inter-frequency measurement, and at the same time determines the measurement type according to the UE's bandwidth capability and neighboring cell information, and only issues inter-frequency neighboring cell information that can perform inter-frequency measurement.

The process of this embodiment is shown in Figure 8, including the following steps:

Step 801: The network side first selects a target neighboring cell based on the known neighboring cells of the cell where the UE is located, and judges whether the UE can target the neighboring cell according to the bandwidth capability of the UE, the location of the cell where the UE is located, and the information of the target neighboring cell. Perform inter-frequency measurement. If possible, add inter-frequency adjacent cell information, determine the measurement gap, and continue to judge the next adjacent cell. If not, continue to judge the next adjacent cell. If there is no next adjacent cell, then End judgment.

Step 802: The network side sends a dedicated measurement control message, which includes but not limited to the information of each inter-frequency neighbor cell selected by the network side in step 801, the measurement gap, and the measurement type for the neighbor cell is inter-frequency measurement. The adjacent cell information includes but not limited to: adjacent cell frequency band information and/or center frequency.

Step 803: The UE performs inter-frequency measurement on inter-frequency adjacent cells according to the indication in the received dedicated measurement control message.

In each of the above-mentioned embodiments, the network side must first send a message for instructing measurement to the UE, and then the UE performs measurement according to the message. If the UE has saved the information of the neighboring cells, the measurement type of the neighboring cells can also be determined in the following manner:

According to specific conditions, the UE initiates the measurement of neighboring cells by itself. The specific conditions may be that the signal quality of the current serving cell is not good, the UE may leave the current serving cell, or other situations that require cell switching/reselection, etc.;

The UE selects a neighbor cell as the target neighbor cell from the saved neighbor cell information, and judges whether the target neighbor cell can be measured in the current working frequency band. The measurement of the cell is inter-frequency measurement.

After the measurement type is determined, the measurement can be continued according to any of the above embodiments.

In an actual LTE system, any combination of various methods described in the above embodiments may be selected to implement the measurement of neighboring cells.

The UE used to implement the above method for measuring neighboring cells will be described below. The UE corresponding to Embodiment 1 is shown in Figure 9, and includes the following modules:

The transceiver module 910 is configured to receive a system message or a dedicated measurement control message sent from the network side to indicate measurement, and send the received message to the measurement type determination module 920; The inter-frequency measurement request of the type determination module 920 is sent to the network side;

The measurement type determination module 920 is used to determine the type of measurement of the target neighboring cell, and the specific method can adopt any of the methods described in Embodiment 1; when the measurement type is determined to be inter-frequency measurement, this module can also use the transceiver module Sending an inter-frequency measurement request for requesting a measurement gap to the network side;

The measurement module 930 is configured to determine a measurement parameter according to the measurement type determined by the measurement type determination module 920, and perform measurement on a target neighboring cell according to the measurement parameter and the measurement type.

The measurement module 930 may further include a parameter saving module 931, which is used to save the determined measurement type and measurement parameters, and delete the saved measurement types and measurement parameters when the UE changes the current cell; it may further include The judging module 932 is configured to judge whether the target neighboring cell can be measured according to the measurement type, and judge whether the measurement of all neighboring cells has been completed, and measure the target neighboring cell according to the judgment result.

Wherein, if the network side does not indicate the measurement type, the measurement type determined by the measurement type determination module 920 must be used to measure the target neighboring cell, and the judging module 932 does not need to judge whether the target neighboring cell can be measured according to the measurement type .

In Embodiment 2, Embodiment 3 or Embodiment 4, the determination of the measurement type is completed by the network side, and the UE does not need to determine the measurement type. Therefore, compared with Embodiment 1, the UE in Embodiment 2 to Embodiment 4 can save Measurement type determination module 920 .

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the protection of the present invention. within range.

Claims (21)

1, a kind of method of measuring adjacent sub-district is characterized in that, this method comprises the steps:

A, determine measuring type of target adjacent section;

B, target adjacent section is measured according to determined measurement type.

2, method according to claim 1 is characterized in that, described definite measurement type adopts following any one method:

A1, determine measuring type of target adjacent section according to the centre frequency of the current working frequency range of bandwidth ability, the UE of user terminal UE, target adjacent section and the combination in any of band information or above information;

A2, determine measuring type of target adjacent section according to the combination in any of the centre frequency of the current working frequency range of bandwidth ability, the UE of user terminal UE, target adjacent section and band information or above information and the measurement type of network side indication;

A3, the information of adjacent cells of having stored according to the UE side are determined measuring type of target adjacent section;

A4, determine measuring type of target adjacent section according to the bandwidth ability of user terminal UE and/or the centre frequency and the band information of target adjacent section.

3, method according to claim 2 is characterized in that, method A3 comprises: UE stores the information and the corresponding measurement type of the adjacent sub-district of measured mistake; UE searches target adjacent section information in the information of adjacent cells of having stored, with the pairing measurement type of information of the target adjacent section that found as measuring type of target adjacent section.

4, method according to claim 2 is characterized in that, determines to measure type according to described method A1 or A4, and then described measurement comprises according to the measurement type:

If the measurement type that B11 determines is a common frequency measurement, UE carries out common frequency measurement; Otherwise execution in step B12;

If the measurement type that B12 determines is a different-frequency measure, then UE carries out different-frequency measure according to the measurement space of network side indication.

5, method according to claim 4 is characterized in that, described step B12 comprises:

B12a, UE are to the request of network side reporting measurement;

B12b, network side indication UE carry out the measurement space of different-frequency measure; UE carries out different-frequency measure according to the measurement space of network side indication after receiving message.

6, method according to claim 5 is characterized in that, described measurement request comprises: the working frequency range that the bandwidth ability of information of adjacent cells, UE, UE are current or the combination in any of above content.

7, method according to claim 2 is characterized in that, determine to measure type according to described method A2, and the measurement type that network side issues is common frequency measurement, and then described measurement type according to the sub-district is measured as:

If the measurement type that B21 determines is a common frequency measurement, then UE carries out common frequency measurement to adjacent sub-district, measures the back execution in step B22 that finishes; If the measurement type of determining is a different-frequency measure, then direct execution in step B22;

B22, judge whether do not measure adjacent sub-district in the adjacent cell list in addition, if then go to steps A; Otherwise end process flow process.

8, method according to claim 2 is characterized in that, determine to measure type according to described method A2, and the measurement type that network side issues is different-frequency measure, and then described measurement type according to the sub-district is measured as:

If the measurement type that B31 determines is a different-frequency measure, then UE carries out different-frequency measure according to measuring indication to adjacent sub-district, measures the back execution in step B32 that finishes; If the measurement type of determining is a common frequency measurement, then direct execution in step B32;

B32, judge whether do not measure adjacent sub-district in the adjacent cell list in addition, if then go to steps A; Otherwise end process flow process.

9, method according to claim 1 is characterized in that, further comprises before described definite measuring type of target adjacent section:

AA1, network side issue information of adjacent cells to UE;

AA2, UE are according to the information of adjacent cells of being received, selecting an adjacent sub-district is target adjacent section.

10, method according to claim 9 is characterized in that, steps A A1 further comprises: network side is to UE sending measuring gap and/or measurement parameter.

11, method according to claim 9 is characterized in that, described message is system message or proprietary measurement control messages.

12, method according to claim 1 is characterized in that, further comprises before described definite measuring type of target adjacent section:

Network side selects the adjacent sub-district of UE as target adjacent section.

13, according to each described method of claim 1 to 8, it is characterized in that, described measurement type comprises common frequency measurement and different-frequency measure, and described common frequency measurement is that UE does not adjust the measurement that the receiver frequency is carried out, and described different-frequency measure is to need UE to adjust the measurement that the receiver frequency is carried out.

According to each described method of claim 1 to 12, it is characterized in that 14, described sub-district is the sub-district of the long-term evolution items LTE of 3G (Third Generation) Moblie technology.

15, a kind of user terminal that is used to measure adjacent sub-district is characterized in that, described user terminal comprises:

Measure the type determination module, be used for definite type that target adjacent section is measured;

Measurement module is used for according to the determined measurement type of measurement type determination module, and according to described measurement parameter target adjacent section is measured.

16, user terminal according to claim 15 is characterized in that, described measurement type determination module is further used for sending the different-frequency measure request that is used to ask to measure the space to network side by transceiver module.

17, user terminal according to claim 15 is characterized in that, described measurement module is further used for determining measurement parameter.

18, user terminal according to claim 15, it is characterized in that, described user terminal further comprises transceiver module, be used to receive the system message that is used for indication measurement or the proprietary measurement control messages that issue from network side, and the message that is received is sent to measurement type determination module.

19, user terminal according to claim 15, it is characterized in that, described measurement module further comprises parameter preservation module, be used to preserve information of adjacent cells and corresponding measurement type, when UE changes sub-district, current place, then delete the information of adjacent cells and the corresponding measurement type of being preserved.

20, according to each described user terminal of claim 15 to 19, it is characterized in that, described measurement module further comprises judge module, is used to judge whether to finish the measurement to all adjacent sub-districts, according to the outcome measurement module of judging target adjacent section is measured.

21, user terminal according to claim 20, it is characterized in that, measurement type in the message that described judge module is further used for judging whether receiving according to transceiver module is measured target adjacent section, if then measurement module is measured target adjacent section.

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