[0036] Aiming at the problems existing in the prior art, the present invention proposes an improved measurement scheme of reference signal received power, which can implement RSRP measurement for a new carrier.
[0037] In order to make the technical solution of the present invention clearer and clearer, the solution of the present invention will be further described in detail below with reference to the accompanying drawings and examples.
[0038] figure 2 It is a flow chart of the first implementation of the method for measuring the received power of the reference signal in the present invention. like figure 2 shown, including the following steps:
[0039] Step 201: Receive measurement configuration information sent by the eNB, where the measurement configuration information carries operating frequency points and measurement reporting conditions.
[0040] In this step, the UE receives the measurement configuration information sent by the eNB, and the measurement configuration information carries the operating frequency point and measurement reporting conditions.
[0041] In a specific embodiment of the present invention, the measurement reporting conditions may be of various types. For example, it may be to report the RSRP value of the neighboring cell higher than the fixed threshold value, or to report the RSRP value of the neighboring cell higher than the pre-obtained RSRP value of the current cell, etc.
[0042] In a preferred embodiment of the present invention, the UE may receive measurement configuration information sent by the eNB through radio resource control (Radio Resource Control, RRC) signaling.
[0043] Step 202: Detect the primary synchronization signal PSS and secondary synchronization signal SSS of the first type of neighboring cell using the first carrier type within the preset time window at the working frequency point, and measure each second synchronization signal according to the detected PSS and SSS The reference signal received power RSRP value of a class of neighboring cells.
[0044] In a specific embodiment of the present invention, the first type of carrier refers to the traditional carrier type in the prior art; the second type of carrier mentioned later refers to the new carrier proposed in the LTE Rel-11 standard type.
[0045] In the existing LTE TDD frame format, the PSS is mapped on the third OFDM symbol of subframe 1 and subframe 6; the SSS is mapped on the last OFDM symbol of subframe 0 and subframe 5. Since the distance between the UE and the eNBs of different neighboring cells is different, the time at which the UE receives the PSS and SSS sent by the eNBs of different neighboring cells may be different. Therefore, in a specific embodiment of the present invention, a time window needs to be set in advance , to ensure that the UE can receive the PSS and SSS sent by eNBs of different neighboring cells. In a preferred embodiment of the present invention, the length of the preset time window may be 10 milliseconds.
[0046] According to the LTE Rel-8 standard, the PSS uses the Zadoff-Chu sequence, and there are 3 PSS sequences in total, and each PSS sequence corresponds to an ID in a physical layer cell group: The value is an integer from 0 to 2; SSS uses m sequence, a total of 168 sequences, each SSS sequence corresponds to a physical layer cell group number: The value is an integer from 0 to 167. community Depend on and jointly decide, specifically, and and Satisfy the following relationship: in, Indicates the cell ID; Indicates the physical layer cell group number; Indicates the ID in the physical layer cell group. It can be seen that, after the UE detects the PSS and SSS, it can determine the cell ID according to the detected PSS and SSS.
[0047] Therefore, in this step, the UE can detect the PSS and SSS of the first type of neighboring cell using the first carrier type within the preset time window on the working frequency point. Further, the UE may detect the PSS and SSS of the first type of neighboring cell according to the predetermined design structure of the PSS and SSS of the first type of neighboring cell. Wherein, the design structure of the PSS and SSS refers to the position of the PSS and SSS in time and frequency, and the sequence adopted by the PSS and SSS. Specifically, the UE can use a common detection method to detect the PSS and SSS of the first type of neighboring cell. For example, the UE can use the predetermined PSS sequence and SSS sequence corresponding to the first carrier type to receive signals on each OFDM symbol. Carry out synchronous correlation, judge the position of PSS and SSS according to the peak value obtained.
[0048] In a specific embodiment of the present invention, the UE may detect the PSS and SSS of one first-type neighboring cell, or may detect the PSS and SSS of multiple first-type neighboring cells. In this step, the UE may measure the RSRP value of each first-type neighboring cell by using multiple common methods according to the detected PSS and SSS. For example, the UE can directly measure the RSRP value of each first-type neighboring cell based on the PSS and SSS of each first-type neighboring cell; in addition, the UE can also measure the RSRP value of each first-type neighboring cell based on the detected PSS and SSS of each first-type neighboring cell, As well as the predetermined positional relationship between the CRS and the PSS or SSS, detect the CRS of each first-type neighboring cell, and measure the RSRP value of each first-type neighboring cell according to the detected CRS; in addition, the UE can also be based on The CRS, PSS and SSS of each first-type neighboring cell, and measure the RSRP value of each first-type neighboring cell.
[0049] Step 203: Determine whether RSRP measurement needs to be performed on the second type of neighboring cells using the second carrier type.
[0050] In a specific embodiment of the invention, after measuring the RSRP value of each first-type neighboring cell, the UE may first determine whether to perform RSRP measurement on the second-type neighboring cell using the second-type carrier type. When the second type of neighboring cell performs RSRP measurement, step 204 is performed; when it is determined that the second type of neighboring cell does not need to perform RSRP measurement, the UE may directly report to the eNB the RSRP value of the first type of neighboring cell meeting the measurement report condition.
[0051] In a preferred embodiment of the present invention, the UE may determine whether to perform RSRP measurement on the second type of neighboring cell according to whether it receives an indication message sent by the eNB. Specifically, when the UE does not receive the indication message sent by the eNB, it indicates that the eNB defaults that the UE needs to perform RSRP measurement on the second type of neighboring cell, so when the UE does not receive the indication message sent by the eNB, the UE determines that the second type Neighboring cells perform RSRP measurement. When the UE receives the indication message sent by the eNB, it indicates that the eNB indicates that the UE does not need to perform RSRP measurement on the second type of neighboring cell. Therefore, when the UE receives the indication message sent by the eNB, it determines that the second type of neighboring cell does not need to be measured. RSRP measurement.
[0052] Preferably, the UE can receive an indication message sent by the eNB through a system information block (System Information Block, SIB).
[0053] Step 204: When it is determined that the RSRP of the second type of adjacent cell needs to be measured, detect the PSS and SSS of the second type of adjacent cell within the time window on the operating frequency point, and measure each of the second type of adjacent cells according to the detected PSS and SSS The RSRP value of the second type of neighboring cell.
[0054] In this step, when it is determined that the RSRP of the second type of neighboring cell needs to be measured, the UE detects the PSS and SSS of the second type of neighboring cell within the time window on the working frequency point. Further, the UE may detect the PSS and SSS of the second type of neighboring cell according to the predetermined design structure of the PSS and SSS of the second type of neighboring cell. Specifically, the UE can detect the PSS and SSS of the second type of adjacent cell according to the predetermined positions of the PSS and SSS of the second type of adjacent cell in time and frequency, and the sequence adopted by the PSS and SSS, for example, the UE can use The predetermined PSS sequence and SSS sequence corresponding to the second carrier type are synchronously correlated with the received signal on each OFDM symbol, and the positions of the PSS and SSS are determined according to the obtained peak values.
[0055] In a specific embodiment of the present invention, the UE may detect the PSS and SSS of one neighboring cell of the second type, or detect the PSS and SSS of multiple neighboring cells of the second type. In this step, the UE may measure the RSRP value of each second-type neighboring cell by using multiple common methods according to the detected PSS and SSS. For example, the UE may directly measure the RSRP value of each second-type neighboring cell based on the PSS and SSS of each second-type neighboring cell; in addition, the UE may also measure the RSRP value of each second-type neighboring cell based on the detected PSS and SSS of each second-type neighboring cell, and the predetermined positional relationship between the CRS and the PSS or SSS, detecting the CRS of each second-type neighboring cell, and measuring the RSRP value of each second-type neighboring cell according to the detected CRS, PSS and SSS.
[0056] Step 205: Report the RSRP value of the first type of neighboring cell and the RSRP value of the second type of neighboring cell meeting the measurement reporting condition to the eNB.
[0057] In a specific embodiment of the present invention, the UE reports to the eNB the RSRP value of the first type of neighboring cell and the RSRP value of the second type of neighboring cell meeting the measurement reporting condition. For example, the measurement reporting condition is to report the RSRP value of the neighboring cell higher than the fixed threshold value, assuming that the fixed threshold value is 10db, then in this step, the UE reports the first type RSRP value higher than 10db to the eNB. The RSRP value of the neighboring cell and the RSRP value of the second type of neighboring cell.
[0058] image 3 It is a flowchart of the second implementation of the method for measuring the received power of the reference signal in the present invention. like image 3 shown, including the following steps:
[0059] Step 301: Send measurement configuration information to the UE, where the measurement configuration information carries operating frequency points and measurement reporting conditions.
[0060] In this step, the eNB sends measurement configuration information to the UE, and the measurement configuration information carries operating frequency points and measurement reporting conditions.
[0061] In a specific embodiment of the present invention, the measurement reporting conditions may be of various types. For example, it may be to report the RSRP value of the neighboring cell higher than the fixed threshold value, or to report the RSRP value of the neighboring cell higher than the pre-obtained RSRP value of the current cell, etc.
[0062] In a preferred embodiment of the present invention, the UE may receive measurement configuration information sent by the eNB through radio resource control (Radio Resource Control, RRC) signaling.
[0063] Preferably, in a specific embodiment of the present invention, the method further includes:
[0064] Step 311: Determine whether the UE needs to perform RSRP measurement on the second type of neighbor cell.
[0065] In this step, the eNB judges whether the UE needs to perform RSRP measurement on the second type of neighboring cells. In a specific embodiment of the present invention, the eNB may use multiple methods to determine whether the UE needs to perform RSRP measurement on the second type of neighboring cell. For example, the eNB can determine whether there is a second-type neighboring cell among the neighboring cells of the UE, and if there is a second-type neighboring cell among the neighboring cells of the UE, it determines that the UE needs to perform RSRP measurement on the second-type neighboring cell; if the UE's neighboring cell If there is no neighboring cell of the second type in the UE, it is determined that the UE does not need to perform RSRP measurement on the neighboring cell of the second type.
[0066] Step 312: When it is determined that the UE does not need to perform RSRP measurement on the second type of neighbor cell, send an indication message to the UE.
[0067] In this step, when it is determined that the UE does not need to perform RSRP measurement on the second type of neighboring cell, the eNB sends an indication message to the UE.
[0068] Preferably, the eNB can send an indication message to the UE through a system information block (SIB).
[0069] Preferably, when it is determined that the UE needs to perform RSRP measurement on the second type of neighboring cell, the eNB may not send an indication message to the UE, that is, the eNB defaults that the UE needs to perform RSRP measurement on the second type of neighboring cell.
[0070] Step 302: When it is determined that the UE needs to perform RSRP measurement on the second type of neighboring cell using the second carrier type, receive the RSRP value and the second The RSRP value of similar neighboring cells.
[0071]In this step, when it is determined that the UE needs to perform RSRP measurement on the second type of neighboring cell using the second carrier type, the eNB receives the RSRP value of the first type of neighboring cell and the second type of neighboring cell that meet the measurement reporting conditions reported by the UE. The RSRP value. For example, the measurement reporting condition is to report the RSRP value of the neighboring cell higher than the fixed threshold value, assuming that the fixed threshold value is 10db, then in this step, the UE reports the first type of neighbor cell higher than 10db to the eNB The RSRP value of the cell and the RSRP value of the second type of neighboring cell.
[0072] The method for measuring the received power of the reference signal proposed by the present invention first detects the PSS and SSS of the first type of adjacent cell using the first carrier type within the preset time window on the operating frequency point, and according to the detected PSS and SSS Measure the RSRP value of each first-type neighboring cell, and then determine whether to perform RSRP measurement on the second-type neighboring cell using the second carrier type. When it is determined that RSRP measurement is required on the second-type neighboring cell, the operating frequency Detect the PSS and SSS of the second type of neighboring cells in the time window, and measure the RSRP value of each second type of neighboring cells according to the detected PSS and SSS. Compared with the prior art, the reference signal received power measurement method and device proposed by the present invention can not only perform RSRP measurement on the first type of adjacent cells, but also perform RSRP measurement on the second type of adjacent cells; and, the present invention The method is simple and convenient to implement and easy to popularize.
[0073] Figure 4 It is a schematic structural diagram of the user equipment in the present invention. like Figure 4 As shown, it includes: a first receiving unit 401, a measuring unit 402, a determining unit 403 and a reporting unit 404;
[0074] The first receiving unit 401 is configured to receive measurement configuration information sent by the evolved base station eNB, where the measurement configuration information carries operating frequency points and measurement reporting conditions, and sends the measurement configuration information to the measurement unit 402 ;
[0075] The measurement unit 402 is configured to detect the primary synchronization signal PSS and the secondary synchronization signal SSS of the first type of neighboring cell using the first carrier type within the preset time window on the operating frequency point, and according to the detected PSS and SSS measure the RSRP value of each of the first-type neighboring cells, send the reference signal received power RSRP value of the first-type neighboring cells to the reporting unit 404, and send a confirmation to the determining unit 403 Instruction; it is also used to detect the PSS and SSS of the second type of neighboring cells on the operating frequency point within the time window after receiving the measurement notification message, and measure each PSS and SSS according to the detected PSS and SSS The RSRP value of the second type of neighboring cell, sending the RSRP value of the second type of neighboring cell to the reporting unit 404;
[0076] The determining unit 403 is configured to, after receiving the determination instruction, determine whether to perform RSRP measurement on a second type of neighboring cell using a second carrier type, and when it is determined that RSRP measurement needs to be performed on the second type of neighboring cell , sending the measurement notification message to the measurement unit 402;
[0077] The reporting unit 404 is configured to report to the eNB the RSRP value of the first type of neighboring cell and the RSRP value of the second type of neighboring cell that meet the measurement reporting condition.
[0078] Further, the determining unit 403 is specifically configured to determine that the RSRP of the second type of neighboring cell needs to be measured when the indication message sent by the eNB is not received; When the indication message is sent, it is determined that it is not necessary to measure the RSRP of the second type of neighboring cell.
[0079] Further, the first receiving unit 401 is specifically configured to receive an indication message sent by the eNB through a system information block SIB.
[0080] Figure 5 It is a schematic structural diagram of an evolved base station in the present invention. like Figure 5 As shown, it includes: a sending unit 501 and a second receiving unit 502;
[0081] The sending unit 501 is configured to send measurement configuration information to the user equipment UE, where the measurement configuration information carries operating frequency points and measurement reporting conditions, and notifies the second receiving unit 502;
[0082] The second receiving unit 502 is configured to, when it is determined that the UE needs to perform RSRP measurement on a second-type neighboring cell using the second carrier type, receive the first carrier that satisfies the measurement reporting condition reported by the UE The reference signal received power RSRP value of the first type of neighboring cell and the RSRP value of the second type of neighboring cell.
[0083] Further, the evolved base station further includes: a judging unit 503;
[0084] The judging unit 503 is configured to judge whether the user equipment UE needs to perform RSRP measurement on the second type of neighboring cell, and when the UE is required to perform RSRP measurement on the second type of neighboring cell, send to the sending unit 501 Send a send command;
[0085] The sending unit 501 is configured to send an indication message to the UE.
[0086] Further, the sending unit 501 is specifically configured to send the indication message to the UE through a system information block SIB.
[0087] Further, the determining unit 503 is specifically configured to determine whether the second type of adjacent cell exists in the adjacent cells of the UE, and if the second type of adjacent cell exists in the adjacent cells of the UE, determine that The UE performs RSRP measurement on the second type of neighboring cell; if the second type of neighboring cell does not exist in the neighboring cells of the UE, it is determined that the UE does not need to perform RSRP on the second type of neighboring cell Measurement.
[0088] The device for measuring the received power of the reference signal proposed by the present invention first detects the PSS and SSS of the first type of adjacent cell using the first carrier type within the preset time window on the working frequency point, and according to the detected PSS and SSS Measure the RSRP value of each first-type neighboring cell, and then determine whether to perform RSRP measurement on the second-type neighboring cell using the second carrier type. When it is determined that RSRP measurement is required on the second-type neighboring cell, the Detect the PSS and SSS of the second type of neighboring cells in the time window, and measure the RSRP value of each second type of neighboring cells according to the detected PSS and SSS. Compared with the prior art, the method and device for measuring the reference signal received power proposed by the present invention can not only perform RSRP measurement on the first type of adjacent cells, but also perform RSRP measurement on the second type of adjacent cells; moreover, the present invention The method is simple and convenient to implement and easy to popularize.
[0089] Figure 4 and Figure 5 For the specific workflow of the shown device embodiment, please refer to figure 1 Corresponding descriptions in the illustrated method embodiments will not be repeated here.
[0090] The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the present invention. within the scope of protection.
