Resource configuration method, information sending method, base station and terminal

[0065] first embodiment

[0066] like figure 1 As shown, the first embodiment of the present invention provides a resource allocation method, which is applied to the first base station to which the first cell belongs, including:

[0067] Step 11, obtaining configuration parameter information for optimally configuring physical random access channel resources of the first cell;

[0068] Wherein, the configuration parameter information includes: the resource configuration information of the MulteFire short physical random access channel (MF-sPRACH) of the neighbor cell of the first cell and/or the random access channel (RACH, Random Access Channel) information of the first cell ; Wherein, the resource configuration information of the MF-sPRACH of the neighbor cell of the first cell may be obtained by the first base station from the second base station, or obtained by the first base station from the information reported by the terminal; the RACH information of the first cell It is statistical information related to random access when the terminal performs random access in the first cell.

[0069] Step 12: Configure physical random access channel resources of the first cell according to the configuration parameter information.

[0070] In the embodiment of the present invention, by optimizing the random access resources according to the physical random access channel resource configuration or random access information of the MF cell, the preamble detection performance of the adjacent cell is improved, and the success probability of the random access of the cell is improved.

[0071] The configuration parameter information includes: the resource configuration information of the MF-sPRACH of the neighboring cell of the first cell and the configuration parameter information includes the random access channel RACH information of the first cell, and the resource configuration method of the embodiment of the present invention is described in detail as follows .

[0072] second embodiment

[0073] like figure 2 As shown, the second embodiment of the present invention provides a resource allocation method, which is applied to the first base station to which the first cell belongs, including:

[0074] Step 21, obtain the resource configuration information of the MF-sPRACH of the neighboring cell of the first cell, wherein the resource configuration information includes: the position of the MF-sPRACH frequency domain resource block, the number of frequency domain resource blocks occupied by the MF-sPRACH, and the MF - at least one of the listen-before-talk LBT types of sPRACH;

[0075] It should be noted that the first cell generally refers to the serving cell of the first base station, that is, the cell served by the first base station, and the adjacent cell of the first cell is generally a cell that does not belong to the first base station (that is, the cell of the first base station Neighboring cells of a cell are cells belonging to other base stations adjacent to the first base station). The location of the MF-sPRACH frequency domain resource block of the adjacent cell of the first cell, the number of frequency domain resource blocks occupied by the MF-sPRACH, and the LBT type of the MF-sPRACH are indicated to the terminal by the adjacent cell of the first cell through a system broadcast message.

[0076] Step 22, configuring physical random access channel resources of the first cell according to the resource configuration information;

[0077] It should be noted that the configuration of the physical random access channel resource of the first cell here mainly refers to the location of the MF-sPRACH frequency domain resource block and the number of frequency domain resource blocks occupied by the MF-sPRACH in the resource configuration information. At least one of the numbers, configure the frequency domain resources occupied by the physical random access channel resources of the first cell to be different from those occupied by the adjacent cells of the first cell, so as to avoid the frequency domain resources of the physical random access channel of the first cell from Mutual interference caused by the same MF-sPRACH frequency domain resources of adjacent cells; and/or

[0078] According to the LBT type of the MF-sPRACH in the resource configuration information, the LBT type of the physical random access channel configured in the first cell is the same as the LBT type of the MF-sPRACH of the neighboring cell of the first cell.

[0079] Wherein, the LBT type of the MF-sPRACH is used to indicate whether the terminal performs LBT on the MF-sPRACH resource. The purpose of configuring the LBT type of the physical random access channel of the first cell to be the same as that of the MF-sPRACH of the adjacent cell is to allow the first cell to have the same channel access priority as that of the adjacent cell, and to avoid not doing so on the MF-sPRACH The LBT cell causes interference to the LBT cell, which affects random access fairness between different cells.

[0080]In this embodiment, by enabling the serving cell of the base station to obtain the MF-sPRACH resource configuration of the adjacent MF cell, the base station can optimize the random access resources of the cell according to the MF-sPRACH resource configuration of the adjacent MF cell, and improve The preamble detection performance of the cell is improved, thereby improving the random access success rate of the terminal in the cell.

[0081] Optionally, the first implementation of step 21 is:

[0082] The preset interface message sent by the second base station is obtained, and the resource configuration information of the MF-sPRACH of the neighboring cell of the first cell is obtained from the preset interface message.

[0083] It should be noted that the preset interface message may be an X2 interface message or an S1 interface message. It should also be noted that the adjacent cell of the first cell is the serving cell of the second base station, or may be an adjacent cell of the serving cell of the second base station.

[0084] In the first implementation mode, the first base station obtains the resource configuration information of the MF-sPRACH of the neighboring cell of the first cell from the second base station. Usually, the second base station is an MF base station (the base station serving the MulteFire cell ), the first base station can be an MF base station or an LTE base station (a base station serving an LTE cell), and the second base station will share the resource configuration information of the MF-sPRACH of all MF cells served by itself and the MF neighboring cells of the served cell The MF-sPRACH resource configuration is sent to the first base station. Since the first base station can clearly obtain the neighbor cells of the first cell, the first base station can select the MF of the neighbor cell of the first cell from the received configuration information. -sPRACH resource configuration information.

[0085] 1. There is an X2 interface between the first base station and the second base station

[0086] When there is an X2 interface between the first base station and the second base station, this step 21 includes during specific implementation:

[0087] Obtain the X2 interface message sent by the second base station;

[0088] Obtain resource configuration information of the MF-sPRACH of the neighboring cell of the first cell from the physical random access channel configuration information of the serving cell of the second base station included in the X2 interface message; and/or

[0089] Obtaining MF-sPRACH configuration information of the neighboring cell of the first cell from the physical random access channel configuration information of the neighboring cell of the serving cell of the second base station in the X2 interface message;

[0090] Wherein, the X2 interface message includes an X2 establishment request message, an X2 establishment response message, an eNB configuration update message or an eNB configuration update response message.

[0091] Specifically, the first base station may receive the X2 interface message sent by the second base station, so as to acquire the resource configuration information of the MF-sPRACH of the neighboring cell of the first cell. Specifically, when the first base station requests to establish an X2 interface with the second base station, the first base station sends an X2 setup request (X2setup Request) message to the second base station, and then the second base station sends an X2 setup response in response to the X2 setup request message (X2Setup Response) message to the first base station, the specific communication process is as follows image 3 It should be noted that the resource configuration information of the MF-sPRACH of the neighbor cell of the first cell is included in the physical random access channel configuration information included in the serving cell information of the X2 establishment response message, or included in the serving cell In the physical random access channel configuration information contained in the adjacent cell information; it is also possible that when the second base station requests to establish an X2 interface with the first base station, the second base station sends an X2 establishment request message to the first base station, and then the first base station responds to the X2 interface Set up a request message, and send an X2 set up response message to the second base station. It should be noted that in this case, the resource configuration information of the MF-sPRACH of the neighbor cell of the first cell includes the serving cell information in the X2 set up request message included in the physical random access channel configuration information, or included in the physical random access channel configuration information included in the neighboring cell information of the serving cell.

[0092] After the X2 interface is established between the first base station and the second base station, the first base station can receive the X2 interface message sent by the second base station, so as to obtain the resource configuration information of the MF-sPRACH of the neighboring cell of the first cell, specifically After the X2 interface is established between the first base station and the second base station, the first base station sends an eNB configuration update (ENBCONFIGURATION UPDATE) message to the second base station, and the second base station sends an eNB configuration update response (eNB configuration update) in response to the eNB configuration update message. update acknowledge) message to the first base station. It should be noted that the resource configuration information of the MF-sPRACH of the neighboring cell of the first cell is included in the physical random access channel configuration information included in the serving cell information of the eNB configuration update response, Or included in the physical random access channel configuration information contained in the adjacent cell information of the serving cell; it may also be that the second base station receives the X2 interface message sent by the first base station, so as to perform MF-sPRACH resources of the adjacent cell of the first cell Transfer of configuration information, specifically, after the first base station and the second base station establish the X2 interface, the second base station sends an eNB configuration update message to the first base station, and the first base station sends an eNB configuration update response in response to the eNB configuration update message It should be noted that in this case, the resource configuration information of the MF-sPRACH of the neighboring cell of the first cell includes the physical random access channel configuration information included in the serving cell information of the eNB configuration update message or included in the physical random access channel configuration information included in the neighboring cell information of the serving cell.

[0093] It should also be noted that when the neighbor cell of the first cell is an MF cell in NHN access mode, the X2 establishment response message/X2 establishment request message and the base station configuration update response message/base station configuration update message need to carry the first cell The NHN-ID of the neighboring cell and the E-UTRAN CellGlobal Identifier (ECGI, E-UTRAN CellGlobal Identifier).

[0094] In this embodiment, two ways of acquiring at least one of the position of the MF-sPRACH frequency domain resource block and the number of frequency domain resource blocks occupied by the MF-sPRACH are given.

[0095] Method 1. Directly obtain the MF-sPRACH frequency domain resource block position and MF- The number of frequency domain resource blocks occupied by the sPRACH.

[0096] Among them, the newly added MF-sPRACH frequency domain resource block position field in the physical random access channel configuration information indicates the frequency domain position of the MF-sPRACH indicated to the terminal by the neighbor cell of the first cell through a system broadcast message, and this field is A bit string with a length of 10, when the Kth bit is set to 1, it means that the starting position of the MF-sPRACH frequency domain resource block is the Kth resource block, and other bits are set to 0; in the physical random access channel configuration information The newly added number of frequency domain resource blocks occupied by MF-sPRACH field indicates the number of MF-sPRACH resource blocks indicated to the terminal by the neighbor cell of the first cell through the system broadcast message, and the value of this field is 1 or 2.

[0097] Method 2: Obtain the frequency domain resource block position of the MF-sPRACH and the number of frequency domain resource blocks occupied by the MF-sPRACH through the original physical random access channel frequency offset field in the physical random access channel configuration information.

[0098] According to the formula: K=PRACH-FrequencyOffset mod 10, the MF-sPRACH frequency domain resource block position is obtained;

[0099] According to the formula: PRACH-NumInterlaces=1+(floor((PRACH-FrequencyOffset mod20)/10)mod 2), the number of frequency domain resource blocks occupied by MF-sPRACH is obtained;

[0100] Among them, K represents the position of MF-sPRACH frequency domain resource blocks, PRACH-NumInterlaces represents the number of frequency domain resource blocks occupied by MF-sPRACH, floor(*) is a function of rounding down, and PRACH-FrequencyOffset is the physical random access channel configuration The value of the physical random access channel frequency offset field in the information, and mod means taking the remainder of dividing two numbers.

[0101] Wherein, the second base station calculates the physical random access channel frequency offset according to the above formula according to the frequency domain resource block position of the MF-sPRACH of the adjacent cell of the first cell and the number of frequency domain resource blocks occupied by the MF-sPRACH, and calculates the physical random access channel frequency offset by using the above formula The random access channel frequency offset is sent to the first base station through the physical random access channel frequency offset field in the physical random access channel configuration information.

[0102] It is worth noting that the first base station judges whether the physical random access channel configuration information contained in the physical random access channel configuration information is MF-sPRACH resource configuration information through the E-UTRA Absolute Radio Frequency Channel Number (EARFCN, E-UTRA Absolute Radio Frequency Channel Number) parameter, if the service The EARFCN in the cell information is the dedicated EARFCN of MF, then the first base station judges that the physical random access channel configuration information contains the resource configuration information of MF-sPRACH, and the value of the physical random access channel frequency offset field is determined according to the above relationship Calculate the frequency domain resource block position of the MF-sPRACH and the number of frequency domain resource blocks occupied by the MF-sPRACH.

[0103] In a feasible implementation manner, since the above second method does not add a new field to the original physical random access channel configuration information element (IE, Information Element), and can only indicate the frequency domain of one MF-sPRACH Location, if there is only one MF-sPRACH in the frequency domain and the first base station is an LTE base station (the first base station may not be able to parse the newly added field MF-sPRACH frequency domain resource block position and the number of frequency domain resource blocks occupied by MF-sPRACH ), the second base station can use the above method 2, that is, use the original physical random access channel frequency offset field in the physical random access channel configuration information to simultaneously indicate the position of the MF-sPRACH frequency domain resource block and the frequency domain occupied by the MF-sPRACH The number of resource blocks.

[0104] Further, if the MF-sPRACH resource configuration information of the neighboring cell of the first cell also includes one of MF-sPRACH zero-correlation region configuration, MF-sPRACH preamble root sequence, and MF-sPRACH time domain resource position or Multiple, then the zero-correlation area configuration of MF-sPRACH, the preamble root sequence of MF-sPRACH and the time domain resource position of MF-sPRACH are obtained in the following ways:

[0105] Through the original zero-correlation region configuration field, root sequence index field and physical random access channel time-domain resource location field in the physical random access channel configuration information, the zero-correlation region configuration of MF-sPRACH and the MF-sPRACH Preamble root sequence and time-domain resource location of MF-sPRACH; among them, the zero-correlation region configuration field, root sequence index field and physical random access channel time-domain resource location field respectively indicate that the neighbor cell of the first cell broadcasts the message through the system Indicates to the terminal the zero-correlation area configuration of the MF-sPRACH of the cell, the preamble root sequence of the MF-sPRACH, and the time-domain resource position of the MF-sPRACH.

[0106]Optionally, the format of the physical random access channel configuration information is shown in Table 5, wherein PRACH-FrequencyIndex and PRACH-NumInterlaces are the MF-sPRACH frequency domain resource block location field and the frequency domain resource block number occupied by the MF-sPRACH respectively Number field, Root Sequence Index is the root sequence index field, Zero Correlation ZoneConfiguration is the zero correlation zone configuration field, PRACH-FrequencyOffset is the physical random access channel frequency offset field, and PRACH-Configuration Index is the physical random access channel time domain resource position field.

[0107]

[0108] Table 5 Format of physical random access channel configuration information

[0109] 2. There is no X2 interface between the first base station and the second base station

[0110] When there is no X2 interface between the first base station and the second base station, the implementation of step 21 is:

[0111] Obtain the S1 interface message sent by the second base station;

[0112] Obtain resource configuration information of the MF-sPRACH of the neighboring cell of the first cell from the physical random access channel configuration information of the serving cell of the second base station included in the S1 interface message; and/or

[0113] Obtain resource configuration information of the MF-sPRACH of the neighboring cell of the first cell from the physical random access channel configuration information of the neighboring cell of the serving cell of the second base station included in the S1 interface message.

[0114] Specifically, when there is no X2 interface between the first base station and the second base station, the first base station may receive the MF-sPRACH resource configuration information of the neighboring cell of the first cell sent by the second base station through an S1 interface message. It should be noted that the first base station may be an MF base station, an LTE base station, a WCDMA base station, a TD-SCDMA base station, or a GSM base station, and the second base station is an MF base station.

[0115] For example, the first base station and the second base station are LTE base stations or MF base stations. When there is no X2 interface between the first base station and the second base station, in order to obtain the resource configuration information of the MF-sPRACH of the neighbor cell of the first cell, the second A base station sends an eNB Configuration Transfer (eNB Configuration Transfer) message to the Mobility Management Entity (MME) to request the resource configuration information of the MF-sPRACH sent by the second base station, and then the MME configuration transfer (MME Configuration Transfer) message is received and forwarded by the MME The resource configuration information of the MF-sPRACH of the neighboring cell of the first cell of the first base station sent by the second base station of the first base station, wherein the resource configuration information is included in self-organized network information (Self Organized Network Information, SON Information) In the newly added serving cell information of the self-organizing network response (SON information Reply) message of the configuration transfer (SON Configuration Transfer) message, it should be noted that, in order to smoothly obtain the resource configuration information of the MF-sPRACH, the first base station sends to MF-sPRACH is added to the self-organizing network information request (SON Information Request) message of the self-organizing network configuration transfer (SONConfigure Transfer) in the eNB configuration transfer message of the MME or the MME configuration transfer message sent by the MME to the second base station The request parameter of the resource configuration information is used for the first base station to request the second base station to send the resource configuration information of MF-sPRACH. The specific communication process is as follows Figure 4 shown.

[0116] Among them, the format of the SON Information field in the SON Configuration Transfer is shown in Table 6:

[0117]

[0118] Table 6 Format of the SON Information field in SON Configuration Transfer Among them, the encoding format of SONInformation Reply is shown in Table 7:

[0119]

[0120] Table 7 Encoding format of SON Information Reply

[0121] Alternatively, the first base station directly receives the resource configuration information of the MF-sPRACH of the neighbor cell of the first cell sent by the second base station forwarded by the MME through the MME CONFIGURATION TRANSFER message, and the resource configuration information of the MF-sPRACH is included in the Son Configuration Transfer field The PRACH configuration of the new field Serving Cell Information is added. The format of the Son Configuration Transfer field is shown in Table 8:

[0122]

[0123] Table 8 Son Configuration Transfer field

[0124]

[0125] Table 9 Format of Serving Cell Information

[0126] Among them, Table 9 is a composition format table of Serving Cell Information.

[0127] In the case that there is no X2 interface between the first base station and the second base station, the method of obtaining the position of the MF-sPRACH frequency domain resource block and the number of resource blocks occupied by the MF-sPRACH is the same as that between the first base station and the second base station The situation where there is an X2 interface is similar, and the way to obtain the zero-correlation area configuration of MF-sPRACH, the preamble root sequence of MF-sPRACH, and the time domain resource position of MF-sPRACH is similar to the existence of an X2 interface between the first base station and the second base station , which will not be described in detail here, and in this case, the format of the physical random access channel configuration information is the same as that in Table 5 above.

[0128] Optionally, the second implementation of step 21 is:

[0129] In the radio resource control RRC measurement report message of the neighboring cell of the first cell sent by the terminal, the resource configuration information of the MF-sPRACH of the neighboring cell of the first cell is acquired.

[0130] The implementation method is: the terminal reads the resource configuration information of the MF-sPRACH contained in the system broadcast message of the neighboring cell of the first cell, and sends it to the first base station through an RRC measurement report message. The first base station may instruct the terminal to report the resource configuration information of the MF-sPRACH of the target cell by sending an RRC measurement configuration message to the terminal. For example, the first base station sets the measurement purpose field in the RRC measurement configuration message as report global cell identity code (report CGI ) to instruct the terminal to report the resource configuration information of the MF-sPRACH of the target cell at the same time when reporting the CGI. Wherein, the target cell is indicated by the physical layer cell identity (PCI, Physical Cell Identity) in the RRC measurement configuration message; or, in the RRC measurement configuration message, the measurement purpose is set to report MF-sPRACH resource configuration information to instruct the terminal to report the target cell The configuration information of the MulteFire short physical random access channel of the cell; further, the first base station can also use the system broadcast reading time indication information to instruct the terminal to independently determine the measurement time for reading the system broadcast message of the target cell when there is service The gap (Gap), that is, the terminal stops the ongoing service when measuring the Gap, and reads the system broadcast message of the target cell (including the resource configuration information of the MF-sPRACH).

[0131] Optionally, the third implementation of step 21 is:

[0132] From the received system broadcast message of the neighboring cell of the first cell, resource configuration information of the MF-sPRACH of the neighboring cell of the first cell is acquired.

[0133] The implementation method is: the first base station directly receives the downlink signal of the neighboring cell of the first cell, and reads the system broadcast message of the neighboring cell to obtain the resource configuration information of the MF-sPRACH of the neighboring cell.

[0134] Specifically, in the embodiment of the present invention, the specific implementation of step 22 is: according to at least one of the position of the MF-sPRACH frequency domain resource block in the resource configuration information and the number of frequency domain resource blocks occupied by the MF-sPRACH, configuring the frequency domain resources occupied by the physical random access channel resources of the first cell to be different from those occupied by neighboring cells of the first cell; and/or

[0135] According to the LBT type of the MF-sPRACH in the resource configuration information, configure the LBT type of the physical random access channel of the first cell to be the same as the LBT type of the MF-sPRACH of the neighboring cell of the first cell.

[0136] It should be noted that when the first base station sets the physical random access channel resource of the first cell and the MF-sPRACH of the adjacent cell to occupy different frequency domain resources, the MF-sPRACH frequency domain resource block positions of the first cell and the adjacent cell different, and are guaranteed to occupy different resource blocks.

[0137] It should be noted that, in order to avoid random access channel interference between different cells caused by the same resource configuration of the physical random access channel of the first cell and its neighboring cells, when the resource configuration information includes MF-sPRACH frequency domain When the resource block position, the number of frequency domain resource blocks occupied by MF-sPRACH, the zero-correlation region configuration of MF-sPRACH, the preamble root sequence of MF-sPRACH and the time domain resource position of MF-sPRACH, according to the configuration parameter information , the step of configuring the physical random access channel resources of the first cell includes:

[0138] According to the MF-sPRACH frequency domain resource block position in the resource configuration information, the number of frequency domain resource blocks occupied by MF-sPRACH, MF-sPRACH zero correlation area configuration, MF-sPRACH preamble root sequence and MF-sPRACH time Domain resource location, configuring at least one of frequency domain resources, time domain resources, and code domain resources occupied by the physical random access channel resources of the first cell to be different from those occupied by neighboring cells of the first cell.

[0139] It should be noted that if the physical random access channel of the first cell occupies the same time-domain resource position as that occupied by its neighboring cells, even if the occupied frequency-domain and code-domain resources are different, it may be because terminals in different cells have to be in the same Random access is performed at a certain time, which leads to LBT failure when some terminals perform random access, which reduces the success rate of random access. Therefore, the first base station may preferentially configure the time-domain resource positions occupied by the physical random access channel resources of the first cell to be different from those occupied by neighboring cells of the first cell, so as to avoid a decrease in random access success rate caused by LBT. When the resource configuration information includes MF-sPRACH time domain resource position, MF-sPRACH frequency domain resource block position, frequency domain resource block number occupied by MF-sPRACH, MF-sPRACH zero correlation area configuration and MF-sPRACH When leading the root sequence, the step of configuring the physical random access channel resources of the first cell according to the configuration parameter information includes:

[0140] According to the MF-sPRACH time-domain resource position in the resource configuration information, configure the time-domain resources occupied by the physical random access channel resources of the first cell to be different from those occupied by neighboring cells of the first cell; or,

[0141] According to the MF-sPRACH time-domain resource position in the resource configuration information, configure the time-domain resources occupied by the physical random access channel resources of the first cell to be the same as those occupied by neighboring cells of the first cell, and according to the resource configuration information MF-sPRACH frequency domain resource block position in MF-sPRACH, the number of frequency domain resource blocks occupied by MF-sPRACH, MF-sPRACH zero-correlation area configuration, MF-sPRACH preamble root sequence, and configure the physical random access channel of the first cell At least one of the frequency domain resource and the code domain resource occupied by the resource is different from that occupied by the neighboring cell of the first cell.

[0142] Wherein, the zero-correlation region configuration and the root sequence index are mainly used for setting code domain resources of physical random access channel resources.

[0143] Further, in order to allow the first cell and its adjacent cells to have the same channel access priority, avoid the cells that do not perform LBT on the MF-sPRACH from causing interference to the cells that perform LBT, and affect the fairness of random access between different cells When the first base station can configure the physical random access channel resources of the first cell to occupy the same time domain resources as those occupied by the neighboring cells of the first cell, configure the LBT type of the physical random access channel of the first cell to be the same as that of the first The MF-sPRACH LBT types of neighboring cells of the cell are the same.

[0144] In the embodiment of the present invention, by enabling the serving cell of the base station to obtain the physical random access channel resource configuration of the adjacent MF cell, the base station can perform physical random access to the serving cell according to the physical random access channel resource configuration of the adjacent MF cell Channel resources are optimized to improve the preamble detection performance of the cell, thereby improving the success rate of random access in the cell.

[0145] third embodiment

[0146] like Figure 5 As shown, the third embodiment of the present invention provides a resource allocation method, which is applied to the first base station to which the first cell belongs.

[0147] It should be noted that the first base station in this embodiment specifically refers to an MF base station, that is, the first cell is an MF cell, and the resource configuration method includes:

[0148] Step 51, receiving the random access channel information of the first cell reported by the terminal, the random access channel information including: the number of times the terminal fails to listen before talking (LBT) when randomly accessing in the first cell;

[0149] It should be noted that the first cell refers to the cell currently accessed by the terminal, the first base station may send a random access channel information request message to the terminal, and when the terminal receives the random access channel information request message, record The random access channel information sent to the first base station, for example, the first base station sends a UE Information Request (UE Information Request) message carrying a random access channel information request identifier to the terminal, and the terminal includes the random access channel information in the terminal sent to the first base station in an information response (UE Information Response) message.

[0150] It should also be noted that the number of times that the terminal failed to listen before speaking during random access in the first cell is the number of times that the terminal failed to listen before speaking during random access to the first cell for the last time or the number of times that the terminal failed to listen before speaking during the random access to the first cell or the number of times that the terminal failed to listen before speaking during the predetermined time. The average value of the times of listening-before-speaking failures during random access in the first cell; wherein, the number of times of listening-before-speaking failures is the listening-before-speaking number of times that the terminal sends a random access preamble during random access in the first cell The number of talk failures and/or the number of listen-before-talk failures sending uplink data.

[0151] Further, the RACH information in this embodiment may also include: the number of preambles sent by the terminal during random access in the first cell and/or an indication of whether the contention resolution fails when the terminal randomly accesses in the first cell information.

[0152] Step 52: Configure physical random access channel resources of the first cell according to the random access channel information.

[0153] It should be noted that when the first base station receives the random access channel information of the first cell sent by the terminal, it optimizes the physical random access channel resources of the first cell according to the random access channel information to reduce the random access channel resources of the terminal. The number of LBT failures when entering. The specific implementation method is: when the number of LBT failures of the terminal in the first cell random access exceeds the first preset threshold, increase the number of subframes occupied by the physical random access channel resource and/or increase the number of transmission The value of the backoff parameter in the random access response to the terminal.

[0154] That is to say, when the number of LBT failures when the terminal randomly accesses in the first cell exceeds the specified threshold, the time domain resource configuration of the physical random access channel resource is optimized, and the configuration of the MF-sPRACH time domain resource position is modified so that The physical random access channel occupies more subframes in the time domain. For example, change the MF-PRACH Configuration Index from 2 to 6, and increase the time-domain resources of the physical random access channel from the seventh subframe of the original odd-numbered system frame to the first subframe and the sixth subframe of each system frame. Subframe, the specific settings are shown in Table 10:

[0155]

[0156] Table 10 Schematic diagram of MF-sPRACH configuration index occupying subframes

[0157] Or the first base station may also increase the backoff (backoff) parameter value in the random access response, where the random access response is the response information sent by the base station after receiving the preamble sent by the terminal, and the terminal according to the latest random access response. The backoff parameter obtains the backoff time and sets the backoff time for sending the preamble. Specifically, the terminal sets the preamble backoff time as a random number generated by a uniform distribution from 0 to the backoff time. Table 11 shows the backoff parameter and Correspondence of banoff time.

[0158]

[0159] Table 11 Correspondence between backoff parameters and backoff time

[0160] It should also be noted that because there is no fixed uplink and downlink subframe configuration in the MF system, the downlink signal of the cell will cause the LBT failure when the terminal performs uplink random access in the cell. Therefore, the LBT failure during the random access of the terminal may be Because of the interference of the downlink signal of the cell or the interference of other cells or terminals. The terminal can obtain the position of the downlink subframe of the cell by receiving the common physical downlink control channel (CPDCCH, Common Physical Downlink Control Channel) of the accessed cell, so as to determine whether the subframe in which the LBT fails during random access is a downlink subframe. Optionally, the above-mentioned number of LBT failures may also include: when the terminal randomly accesses in the first cell, the number of subframes in which the LBT fails is the downlink subframe of the first cell. In this case, the embodiment of the present invention The resource allocation methods also include:

[0161] When the number of downlink subframes of the first cell that fail to listen before speaking when the terminal randomly accesses in the first cell exceeds the second preset threshold, adjust and reduce the downlink subframes of the first base station of scheduling times.

[0162] That is to say, if the random access channel information reported by the terminal also includes the number of downlink subframes of the first cell in which the subframe where the LBT fails when the terminal randomly accesses in the first cell, when the number of LBT failures exceeds the specified threshold When , the first base station can also reduce the number of LBT failures when the terminal randomly accesses in the first cell by reducing the scheduling of downlink subframes.

[0163] It should also be noted that when the RACH information includes the number of preambles sent by the terminal when it randomly accesses in the first cell and/or the indication information whether the contention resolution fails when the terminal randomly accesses in the first cell, the first base station also The configuration related to random access may be adjusted according to the above information.

[0164] Specifically, the first base station may adjust the uplink power control parameters of the MF-sPRACH according to the number of random access preambles sent by the terminal, including the initial target received power of the preamble and the ramp-up step of the preamble power. Or, adjust the resource configuration of MF-sPRACH, the common and dedicated preamble configuration or the backoff parameter value in the random access response according to the indication information sent by the terminal whether the contention resolution fails; for example, when the terminal indicates that the contention resolution fails, the first The base station can increase the time domain, frequency domain or code domain resources of MF-sPRACH, or increase the number of common preambles, or increase the backoff parameter value in the random access response, so as to reduce the probability of contention resolution failure in random access.

[0165] In the embodiment of the present invention, the random access resource optimization is performed according to the random access information reported by the terminal, so that the success probability of the random access of the terminal in the cell is improved.