WO2015062100A1

WO2015062100A1 - Method and equipment for transmitting random access message

Info

Publication number: WO2015062100A1
Application number: PCT/CN2013/086472
Authority: WO
Inventors: 张向东; 余政
Original assignee: 华为技术有限公司
Priority date: 2013-11-01
Filing date: 2013-11-01
Publication date: 2015-05-07
Also published as: CN104813731A

Abstract

Disclosed in the present invention are a method and equipment for transmitting a random access message, through which coverage enhancement based on the use of signal repetition is realized. The method disclosed in the embodiment of the present invention comprises: receiving random access preamble sequences transmitted by user equipment, and determining a random access response corresponding to the random access preamble sequence transmitted by each user equipment; according to the received random access preamble sequence transmitted by the user equipment as well as a transmission mode for the random access response, determining parameter information required for transmitting the random access response corresponding to the random access preamble sequence; and on the basis of the parameter information determined, transmitting the random access response to the user equipment according to the transmission mode.

Description

Method and device for transmitting random access message

Technical field

The present invention relates to the field of communications, and in particular, to a method and device for transmitting a random access message. Background technique

The Internet of Things (IoT) refers to the network that realizes the interconnection of people, things, objects and objects by deploying various devices with certain sensing, computing, execution and communication capabilities to acquire information of the physical world and realize information transmission, coordination and processing through the network. . In other words, the Internet of Things is to realize the intercommunication between people and things, things and things. Possible applications for the Internet of Things include smart grids, smart agriculture, intelligent transportation, and environmental testing.

Machine-to-machine (Machine to Machine, M2M) communication is the third Generation Partnership Project ^{(The 3 rd Generation Partnership, 3GPP} ) standardization of concepts and techniques for the study of how the proposed networking applications hosted on the mobile communication network, and set up The project team studied the enhancement or optimization of the mobile communication network for the introduction of MTC equipment. At present, the 3GPP Long Term Evolution (LTE) project proposes a coverage-enhanced research topic for specific application scenarios of MTC devices: Provides coverage enhancement for MTC devices in environments with large path loss (such as basements, etc.) Support enables the MTC device to access the network to obtain services provided by the network.

In an existing wireless network, a terminal in idle mode first needs to initiate a random access (RA) process to obtain uplink synchronization and/or a suitable transmit power value, so as to establish a connection with the network, and then transmit. User data. The transmission process of the random access message is specifically: the terminal sends a random access preamble (Preamble) sequence to the base station, and after receiving the Preamble sequence ¹ J sent by the terminal, the base station returns a random access response to the terminal ( Random Access Response) , RAR message, the RAR message includes an uplink synchronization time advance (TA) value and/or a suitable transmit power for implementing terminal uplink synchronization.

After the MTC device in the environment with a large path loss sends a Preamble sequence to the base station, the base station may not receive the Preamble sequence sent by the MTC device, or the base station receives the Preamble sequence. After the Preamble sequence sent by the MTC device returns a RAR message to the MTC device, the MTC device may not receive the RAR message sent by the base station, so that the MTC device cannot access the network, and therefore, the environment in which the path loss is large is required. The underlying MTC device performs coverage enhancement to ensure that the base station can effectively receive the Preamble sequence of the MTC device and the MTC device can effectively receive the RAR message returned by the base station.

Signal repetition is one of the ways to achieve coverage enhancement of MTC devices in environments with large path losses. As shown in FIG. 1 , for example, the terminal repeatedly transmits the Preamble sequence to the base station to ensure that the base station can receive the data. The base station repeatedly sends the R RAR message to the terminal after receiving the Preamble sequence sent by the terminal to ensure the terminal. Can receive effectively. In the above coverage enhancement scenario, the MTC equipment is in a different environment, the path loss experienced by the signal is different, and the corresponding signal coverage enhancement requirements are different, so the number of times required for signal repetition is also different. In the prior art implementation, the coverage enhancement requirement of the device can be divided into different coverage enhancement levels. Then, different coverage enhancement levels correspond to different coverage enhancement requirements, and also correspond to different signal repetition times.

However, there is currently no specific implementation scheme for implementing coverage enhancement of multiple user equipments by means of signal repetition. Summary of the invention

The embodiment of the invention provides a method for transmitting a random access message, which implements coverage enhancement using signal repetition.

In a first aspect, a method for transmitting a random access message includes: receiving a random access preamble sequence sent by a user equipment, and determining a random access response corresponding to a random access preamble sequence sent by each user equipment;

And determining, according to the received random access preamble sequence sent by the user equipment and the sending manner of the random access response, parameter information required for sending the random access response corresponding to the random access preamble sequence; and

Sending, according to the determined parameter information, a random access response to the user equipment according to the sending manner; The sending mode includes: using a random access response message to send a random access response corresponding to the random access preamble sequence sent by the user equipments with different coverage enhancement levels, or separately sending the packets by using different random access response messages. a random access response corresponding to the random access preamble sequence sent by the user equipment of the different coverage enhancement level; the parameter information includes: time-frequency resource information used to carry the random access response message, repetition times of the random access response message, At least one of a transmission time of the random access response message and a scrambling code sequence for scrambling the transmitted random access response message.

With reference to the first aspect, in a first possible implementation manner, if the random access response is sent by using a random access response message, the random access preamble sequence corresponding to the user equipment with different coverage enhancement levels is sent. The random access response, according to the received random access preamble sequence sent by the user equipment and the sending manner of the random access response, determine the number of repetitions of sending the random access response message, which specifically includes:

Determining, according to the random access preamble sequence sent by the user equipment, a coverage enhancement level of the user equipment;

Obtaining, according to the correspondence between the coverage enhancement level and the number of repetitions of the random access response, the number of repetitions corresponding to the largest coverage enhancement level of the determined coverage enhancement level, and the number of repetitions of transmitting the one random access response message.

With the first possible implementation of the first aspect, in a second possible implementation manner, if the random access response is sent by using a random access response message, the user equipments with different coverage enhancement levels are sent. The random access response corresponding to the sent random access preamble sequence determines, according to the received random access preamble sequence sent by the user equipment and the sending manner of the random access response, the sending moment of sending the random access response message Specifically, including:

Determining, according to the received random access preamble sequence sent by the user equipment, and the sending manner of the random access response, that the sending time of the one random access response message is n+k, where n is the last configured pre-configuration For the number of the subframe carrying the random access preamble sequence, k is a pre-configured subframe offset. With the first possible implementation of the first aspect, or the second possible implementation of the first aspect, in a third possible implementation, if the random access response is sent by using one The random access response message sends a random access response corresponding to the random access preamble sequence sent by the user equipment with different coverage enhancement levels, according to the received random access preamble sequence sent by the user equipment and the sending manner of the random access response, Determining a scrambling code sequence for sending the random access response, specifically:

Determining a subframe index t_id used for scrambling the random access response message to be the same subframe number used by the user equipment having different coverage enhancement levels to transmit the random access preamble sequence Or, the number of the subframe used when the random access preamble sequence corresponding to the preset coverage enhancement level is transmitted; and,

Determining, by using the frequency domain index f_id used for scrambling code sequence calculation for scrambling the one random access response message, the same frequency domain information used when the user equipment with different coverage enhancement levels sends the random access preamble sequence, Or the frequency domain information used when the random access preamble sequence corresponding to the preset coverage enhancement level is transmitted.

In conjunction with the third possible implementation of the first aspect, in a fourth possible implementation, determining a t-id used for scrambling the scrambling code sequence for scrambling the one random access response message is: The number of the same starting subframe used by the user equipment that covers the enhanced level to transmit the random access preamble sequence or the number of the same ending subframe; or

The number of the start subframe or the number of the end subframe used when the random access preamble sequence corresponding to the preset coverage enhancement level is transmitted.

Combining the first possible implementation of the first aspect, or the second possible implementation of the first aspect, or the third possible implementation of the first aspect, or the fourth of the first aspect In a fifth possible implementation manner, if at least two of the user equipments with different coverage enhancement levels use different random access resources to send the same random access preamble sequence, The method also includes:

The first indication information is carried in the random access response message, where the first indication information is a random access response corresponding to a random access preamble sequence sent by a user equipment that uses different random access resources in a random access response message sent, or

The second random access response message carries the second indication information, where the second indication information is used to indicate a random access preamble sequence sent by the user equipment with different coverage enhancement levels in the sent random access response message. Corresponding random access response.

With reference to the first aspect, in a sixth possible implementation manner, if the random access response is sent by using different random access response messages, respectively, the random access preamble sequence sent by the user equipment with different coverage enhancement levels is sent. Corresponding random access response, according to the received random access preamble sequence sent by the user equipment and the sending manner of the random access response, determining to send the random access corresponding to the random access preamble sequence sent by each user equipment The number of repetitions required to respond, including:

Determining, according to a random access preamble sequence sent by each of the user equipments, a coverage enhancement level of each of the user equipments; and

And determining, according to the correspondence between the coverage enhancement level and the number of repetitions of the random access response, the number of repetitions of the random access response message corresponding to the random access preamble sequence sent by each user equipment.

With reference to the sixth possible implementation manner of the first aspect, in a seventh possible implementation manner, determining, according to the received random access preamble sequence sent by the user equipment, and the sending manner of the random access response, The parameter information required for the random access response corresponding to the random access preamble sequence sent by the user equipment includes:

Determining, according to the received random access preamble sequence sent by the user equipment, and the manner in which the random access response is sent, a random access preamble sequence sent by each of the user equipments for scrambling the random access preamble The scrambling code sequence of the random access response message corresponding to the sequence, and/or determining a different sending time for the random access response message corresponding to the random access preamble sequence sent by each user equipment.

With reference to the seventh possible implementation manner of the first aspect, in the eighth possible implementation manner, according to the received random access preamble sequence sent by the user equipment and the sending manner of the random access response, Random access response message corresponding to the random access preamble sequence sent by the user equipment Determine a different delivery time, including:

Determining a sending moment of the random access response message corresponding to the random access preamble sequence sent by each of the user equipments, where different starting subframes or different endings used for sending the random access preamble sequence for each user equipment Subframe, k is a pre-configured subframe offset.

With reference to the seventh possible implementation manner of the foregoing aspect, in a ninth possible implementation manner, determining, according to the received random access preamble sequence sent by the user equipment, and the sending manner of the random access response, determining that the method is used for scrambling The scrambling sequence of the random access response message corresponding to the random access preamble sequence sent by the user equipment includes:

Determining, by using the t_id used for scrambling the random access sequence calculation corresponding to the random access preamble sequence sent by each of the user equipments, when each of the user equipments sends a random access preamble sequence The number of the different subframes used; and / or,

Determining, by using the f _ id used for scrambling a random access response message corresponding to the random access preamble sequence sent by each of the user equipments, to send a random access preamble sequence to each of the user equipments Different frequency domain information used.

With reference to the first possible implementation of the first aspect, or the sixth possible implementation of the first aspect, in a tenth possible implementation manner, according to the random access preamble sequence sent by the user equipment, Determining a coverage enhancement level of the user equipment, specifically:

And determining, according to the random access preamble sequence group to which the random access preamble sequence sent by the user equipment belongs, a coverage enhancement level of the user equipment that sends the random access preamble sequence, where each random access preamble sequence group corresponds to one Different coverage enhancement levels, each random access preamble sequence group includes at least one pre-configured random access preamble sequence and different random access preamble sequences included in different random access preamble sequence groups are different; or

Determining, according to a frequency domain location of the random access resource of the random access preamble sequence sent by each of the user equipments, a coverage enhancement level of the user equipment that sends the random access preamble sequence, where, in the random access process The used random access resource is divided into multiple resource groups in the frequency domain, and each resource group corresponds to a different coverage enhancement level; or Determining, according to a time domain location of the random access resource of the random access preamble sequence sent by each of the user equipments, a coverage enhancement level of the user equipment that sends the random access preamble sequence, where, in the random access process The used random access resources are divided into multiple resource groups in the time domain, and each resource group corresponds to a different coverage enhancement level.

In a second aspect, a method for transmitting a random access message includes:

Sending a random access preamble sequence to the base station, and indicating the coverage enhancement level of the self by the random access preamble sequence;

Determining parameter information required to receive the random access response message corresponding to the random access preamble sequence according to a sending manner of the random access response; and

Receiving, according to the determined parameter information, a random access response message sent by the base station according to the repeated access times of the random access response corresponding to the coverage enhancement level;

The sending mode includes: using a random access response message to send a random access response corresponding to the random access preamble sequence sent by the user equipments with different coverage enhancement levels, or separately sending the packets by using different random access response messages. a random access response corresponding to the random access preamble sequence sent by the user equipment of the different coverage enhancement level; the parameter information includes: time-frequency resource information for carrying a random access response, a receiving time of the random access response message, and At least one of the scrambling code sequences used to descramble the random access response message.

With reference to the second aspect, in a first possible implementation, the sending a random access preamble sequence to the base station includes:

Determining a random access preamble sequence group corresponding to its own coverage enhancement level, and selecting a random access preamble sequence from the determined random access preamble sequence group, and transmitting the selected random access preamble sequence to the base station, Each random access preamble sequence group corresponds to a different coverage enhancement level, and each random access preamble sequence group includes at least one pre-configured random access preamble sequence and random connections included in different random access preamble sequence groups. The preamble sequence is different; or, determining a frequency domain location corresponding to its own coverage enhancement level, and transmitting a random access preamble sequence to the base station in the determined frequency domain location, where the random access resource used in the random access process Dividing into multiple resource groups in the frequency domain, each resource group corresponding to a different coverage enhancement level; or Determining a time domain location corresponding to its own coverage enhancement level, and transmitting a random access preamble sequence to the base station in the determined time domain location, where the random access resources used in the random access process are divided in the time domain Multiple resource groups, each resource group corresponding to a different coverage enhancement level.

With reference to the second aspect, or in combination with the first possible implementation manner of the second aspect, in the second possible implementation manner, if the random access response is sent in a manner that is different by using a random access response message The random access response corresponding to the random access preamble sequence sent by the user equipment covering the enhanced level,

Determining, according to the sending manner of the random access response, that the receiving time of receiving the random access response message is n + k, where n is a pre-configured last number of the subframe used to carry the random access preamble sequence , k is the pre-configured subframe offset.

With reference to the second aspect, or in combination with the first possible implementation of the second aspect, or the second possible implementation of the second aspect, in a third possible implementation, if the random access response The method of sending is to use a random access response message to send a random access response corresponding to the random access preamble sequence sent by the user equipment with different coverage enhancement levels, and determining, according to the manner of sending the random access response, A scrambling sequence of a random access response message includes:

Determining, by using the t_id used for descrambling the received random access response message, the t_id used for the same subframe used by the user equipment having different coverage enhancement levels to transmit the random access preamble sequence Or, the number of the subframe used when the random access preamble sequence corresponding to the preset coverage enhancement level is transmitted; and,

Determining, by using the f_id used for descrambling the received random access response message, the same frequency domain information used by the user equipment having different coverage enhancement levels to transmit the random access preamble sequence, or The frequency domain information used when the random access preamble sequence corresponding to the preset coverage enhancement level is transmitted.

With reference to the third possible implementation manner of the second aspect, in a fourth possible implementation, determining, by using a scrambling code sequence for descrambling the received one random access response message t _ id is specifically:

The same starting subframe number or the same ending subframe number used by the user equipment with different coverage enhancement levels when transmitting the random access preamble sequence; or

Combining the first possible implementation of the second aspect, or the second possible implementation of the second aspect, or the third possible implementation of the second aspect, or the fourth of the second aspect Possible implementation manners, in a fifth possible implementation manner, the method further includes:

And determining, according to the received random access response message, the first indication information, the random access response corresponding to the random access preamble sequence sent by the one of the random access response messages, where An indication information is used to indicate a random access response corresponding to a random access preamble sequence sent by a user equipment that uses different random access resources in a random access response message received by the user equipment; or

And determining, according to the received random access response message, the second indication information, the random access response corresponding to the random access preamble sequence sent by the one of the random access response messages, where The second indication information is used to indicate a random access response corresponding to the random access preamble sequence sent by the user equipment with different coverage enhancement levels in a random access response message received by the user equipment.

With reference to the second aspect, or in combination with the first possible implementation manner of the second aspect, in a sixth possible implementation manner, if the random access response is sent by using different random access response messages, respectively Random access response corresponding to the random access preamble sequence sent by the user equipment with different coverage enhancement levels,

Determining, according to the sending manner of the random access response, the receiving time of the random access response corresponding to the random access preamble sequence is A + k , where the starting subframe or ending used by the random access preamble sequence is sent by itself Subframe, k is a pre-configured subframe offset.

Combining the second aspect, or combining the first possible implementation of the second aspect, in the seventh In an implementation manner, if the random access response is sent by using a random access response message to send a random access response corresponding to the random access preamble sequence sent by the user equipment with different coverage enhancement levels, Determining the scrambling code sequence of the random access response message corresponding to the random access preamble sequence for descrambling itself includes:

Determining the sc_code used for the scrambling sequence calculation of the random access response message corresponding to the random access preamble sequence for descrambling itself is the number of the subframe used when transmitting the random access preamble itself; and/or, Determining the f_id used by the scrambling code sequence corresponding to the random access preamble sequence for descrambling itself is the frequency domain information used when transmitting the random access preamble sequence by itself.

In a third aspect, a network device includes:

a receiving module, configured to receive a random access preamble sequence sent by the user equipment, and determine a random access response corresponding to the random access preamble sequence sent by each user equipment;

a processing module, configured to determine, according to the received random access preamble sequence sent by the user equipment, and a sending manner of the random access response, parameter information required for sending the random access response corresponding to the random access preamble sequence; and

a sending module, configured to send, according to the parameter information determined by the processing module, a random access response to the user equipment according to the sending manner;

The sending mode includes: using a random access response message to send a random access response corresponding to the random access preamble sequence sent by the user equipments with different coverage enhancement levels, or separately sending the packets by using different random access response messages. a random access response corresponding to the random access preamble sequence sent by the user equipment of the different coverage enhancement level; the parameter information includes: time-frequency resource information used to carry the random access response message, repetition times of the random access response message, At least one of a transmission time of the random access response message and a scrambling code sequence for scrambling the transmitted random access response message.

With reference to the third aspect, in a first possible implementation, if the random access response is sent in a random access response message, the random access preamble sequence sent by the user equipment with different coverage enhancement levels is sent. Corresponding random access response, the processing module determines to send The sending moment of the random access response message specifically includes:

Determining, according to the random access preamble sequence sent by the user equipment, a coverage enhancement level of the user equipment; and acquiring, according to a correspondence between the coverage enhancement level and the random access response repetition number, the largest of the determined coverage enhancement levels. The number of repetitions corresponding to the enhancement level is covered, and is the number of repetitions of transmitting the random access response message.

With the first possible implementation manner of the third aspect, in a second possible implementation manner, if the random access response is sent by using a random access response message, the user equipments with different coverage enhancement levels are sent. And the sending, by the processing module, the sending time of the random access response message, where the processing module determines, according to the received random access preamble sequence sent by the user equipment, The sending manner of the random access response determines that the sending time of the random access response message is n + k , where n is a pre-configured last number of the subframe used to carry the random access preamble sequence, k Is the pre-configured sub-frame offset.

With the first possible implementation of the third aspect, or the second possible implementation of the third aspect, in a third possible implementation, if the random access response is sent by using one The random access response message sends a random access response corresponding to the random access preamble sequence sent by the user equipment with different coverage enhancement levels, and the processing module determines, according to the following manner, the scrambling code sequence for sending the one random access response:

Determining, by using the subframe index t_id used for scrambling the random access response message, the number of the same subframe used by the user equipment with different coverage enhancement levels to transmit the random access preamble sequence, Or the number of the subframe used when the random access preamble sequence corresponding to the preset coverage enhancement level is transmitted; and,

Determining, by using the frequency domain index f_id used for scrambling the random access response message for scrambling the one random access response message, the same frequency domain information used when the user equipment having different coverage enhancement levels sends the random access preamble sequence, or The frequency domain information used when the random access preamble sequence corresponding to the preset coverage enhancement level is transmitted. In conjunction with the third possible implementation of the third aspect, in a fourth possible implementation, the processing module determines a t _ id used for scrambling the scrambling code sequence for scrambling the one random access response message Specifically:

Combining the first possible implementation of the third aspect, or in combination with the second possible implementation of the third aspect, or in combination with the third possible implementation of the third aspect, or in combination with the fourth aspect of the third aspect In a fifth possible implementation manner, if the at least two user equipments use different random access resources to send the same random access preamble sequence, the processing module is further configured to:

And transmitting, by the first indication information, the first indication information, where the first indication information is used to indicate a random access preamble sent by a user equipment that uses different random access resources in a random access response message that is sent. The random access response corresponding to the sequence, or,

With the third aspect, in a sixth possible implementation manner, if the random access response is sent by using different random access response messages, respectively, the random access preamble sent by the user equipment with different coverage enhancement levels is sent. And the processing module determines the number of repetitions required to send the random access response corresponding to the random access preamble sequence sent by each user equipment, where the processing module determines:

Determining, according to a random access preamble sequence sent by each user equipment, a coverage enhancement level of each of the user equipments; and determining, according to a correspondence between a coverage enhancement level and a random access response repetition number, each of the users Random access ring corresponding to the random access preamble sequence sent by the device The number of times the message should be repeated.

With reference to the sixth possible implementation manner of the third aspect, in a seventh possible implementation manner, if the random access response is sent by using different random access response messages, respectively, sending different coverage enhancement levels And the processing module determines the parameter information required to send the random access response corresponding to the random access preamble sequence sent by each user equipment, where the random access response message corresponding to the random access preamble sequence sent by the user equipment is specific, Includes:

With the seventh possible implementation of the third aspect, in an eighth possible implementation manner, the processing module determines, for the random access response message corresponding to the random access preamble sequence sent by each user equipment, Different sending moments, including:

With reference to the seventh possible implementation manner of the third aspect, in a ninth possible implementation manner, the processing module determines, for scrambling random access corresponding to a random access preamble sequence sent by each user equipment The scrambling sequence of the response message specifically includes:

Determining, by using the f _ id used for scrambling a random access response message corresponding to the random access preamble sequence sent by each of the user equipments, to send a random access preamble sequence to each of the user equipments Different frequency domain information used. With reference to the first possible implementation manner of the third aspect, or the sixth possible implementation manner of the third aspect, in a tenth possible implementation manner, the processing module determines a coverage enhancement level of the user equipment Specifically, including:

And determining, according to the random access preamble sequence group to which the random access preamble sequence sent by the user equipment belongs, a coverage enhancement level of the user equipment that sends the random access preamble sequence, where each random access preamble sequence group corresponds to a different one. Covering the enhancement level, each random access preamble sequence group includes at least one pre-configured random access preamble sequence and different random access preamble sequences included in different random access preamble sequence groups are different; or

Determining, according to a frequency domain location of the random access resource that carries the random access preamble sequence sent by each user equipment, a coverage enhancement level of the user equipment that sends the random access preamble sequence, where the random access procedure is used The random access resource is divided into multiple resource groups in the frequency domain, and each resource group corresponds to a different coverage enhancement level; or, according to the random access resource that carries the random access preamble sequence sent by each user equipment a domain location, where the coverage enhancement level of the user equipment that sends the random access preamble sequence is determined, where the random access resource used in the random access procedure is divided into multiple resource groups in the time domain, and each resource group corresponds to one Different coverage enhancement levels.

In a fourth aspect, a user equipment includes:

a sending module, configured to send a random access preamble sequence to the base station, and indicate a coverage enhancement level of the base station by using the random access preamble sequence;

a processing module, configured to determine, according to a sending manner of the random access response, parameter information required to receive the random access response message corresponding to the random access preamble sequence; and

a receiving module, configured to receive, according to parameter information determined by the processing module, a random access response message sent by the base station according to a repetition quantity of the random access response corresponding to the coverage enhancement level of the coverage module, where the sending manner includes using a random The access response message sends a random access response corresponding to the random access preamble sequence sent by the user equipments with different coverage enhancement levels, or sends different random transmission response messages to the user equipments with different coverage enhancement levels. Accessing a random access response corresponding to the preamble sequence; the parameter information includes: time-frequency resource information for carrying a random access response message, a receiving moment of the random access response message, and At least one of the scrambling code sequences of the random access response message is descrambled.

With reference to the fourth aspect, in a first possible implementation manner, the sending module is specifically configured to: determine a random access preamble sequence group corresponding to a coverage enhancement level of the self, and determine the random access preamble sequence group from the determined Selecting a random access preamble sequence, and transmitting the selected random access preamble sequence to the base station, where each random access preamble sequence group corresponds to a different coverage enhancement level, and each random access preamble sequence group includes At least one pre-configured random access preamble sequence and different random access preamble sequences included in different random access preamble sequence groups are different; or determining a frequency domain position corresponding to its own coverage enhancement level, in the determined frequency domain position Sending a random access preamble sequence to the base station, where the random access resource used in the random access process is divided into multiple resource groups in the frequency domain, and each resource group corresponds to a different coverage enhancement level; or, determining and itself The coverage enhancement level corresponds to the time domain location, and is sent to the base station at the determined time domain location A random access preamble, wherein the random access resource in the random access procedure is used into a plurality of groups in the time domain resource, each resource group corresponding to a different coverage enhancement level.

With reference to the fourth aspect, or in combination with the first possible implementation manner of the fourth aspect, in the second possible implementation manner, if the random access response is sent in a manner that uses a random access response message to send different And the processing module is specifically configured to:

With reference to the fourth aspect, or in combination with the first possible implementation manner of the fourth aspect, or the second possible implementation manner of the fourth aspect, in the third possible implementation manner, if the random access response The sending mode is to use a random access response message to send a random access response corresponding to the random access preamble sequence sent by the user equipment with different coverage enhancement levels, and the processing module determines to use the descrambled one of the received ones. The scrambling sequence of the random access response message specifically includes: determining a scrambling code sequence used to descramble the received random access response message The t_id is the number of the same subframe used when the user equipment having different coverage enhancement levels transmits the random access preamble sequence, or is used when the random access preamble sequence corresponding to the preset coverage enhancement level is transmitted. The number of the sub-frame; and,

Determining, by using the f_id used for the scrambling code sequence calculation for descrambling the received one random access response message, the same frequency domain information used when the user equipment with different coverage enhancement levels sends the random access preamble sequence, Or the frequency domain information used when the random access preamble sequence corresponding to the preset coverage enhancement level is transmitted.

With the third possible implementation of the fourth aspect, in a fourth possible implementation, the processing module determines, used by the scrambling code sequence for descrambling the received one random access response message t _ id is specifically:

Combining the first possible implementation of the fourth aspect, or in combination with the second possible implementation of the fourth aspect, or in combination with the third possible implementation of the fourth aspect, or in combination with the fourth aspect of the fourth aspect Possible implementation, in the fifth possible implementation,

The processing module is further configured to: determine, according to the received first random access response message, the first indication information, and determine, in the random access response message, the random access corresponding to the random access preamble sequence sent by itself In response, the first indication information is used to indicate a random access response corresponding to the random access preamble sequence sent by the user equipment that uses different random access resources in a random access response message received by the user equipment; or ,

And determining, according to the received random access response message, the second indication information, the random access response corresponding to the random access preamble sequence sent by the one of the random access response messages, where The second indication information is used to indicate that the random access preamble sequence sent by the user equipment with different coverage enhancement levels in a random access response message received by the user equipment corresponds to Random access response.

With reference to the fourth aspect, or in combination with the first possible implementation manner of the fourth aspect, in a sixth possible implementation manner, if the random access response is sent by using different random access response messages, respectively The random access response corresponding to the random access preamble sequence sent by the user equipment with different coverage enhancement levels, the processing module is specifically configured to:

With reference to the fourth aspect, or in combination with the first possible implementation manner of the fourth aspect, in a seventh possible implementation manner, if the random access response is sent by using different random access response messages, respectively The random access response corresponding to the random access preamble sequence sent by the user equipment with different coverage enhancement levels, the processing module determines a scrambling code sequence of the random access response message corresponding to the random access preamble sequence for descrambling itself Specifically, including:

In a fifth aspect, a network device includes:

a transceiver, configured to receive a random access preamble sequence sent by the user equipment;

The processor is configured to determine a random access response corresponding to the random access preamble sequence sent by each user equipment, and determine to send according to the received random access preamble sequence sent by the user equipment and the sending manner of the random access response The parameter information required for the random access response sequence corresponding to the random access preamble sequence; and triggering the transceiver to send a random access response to the user equipment according to the determined manner according to the determined parameter information;

The sending mode includes: using a random access response message, sending a random access response corresponding to the random access preamble sequence sent by the user equipment with different coverage enhancement levels, or Transmitting a random access response corresponding to the random access preamble sequence sent by the user equipment with different coverage enhancement levels by using different random access response messages; the parameter information includes: a time-frequency resource used to carry the random access response message The information, the number of repetitions of the random access response message, the transmission time of the random access response message, and at least one of the scrambling code sequences for scrambling the transmitted random access response message.

With reference to the fifth aspect, in a first possible implementation manner, if the random access response is sent by using a random access response message, the random access preamble sequence corresponding to the user equipment with different coverage enhancement levels is sent. And the determining, by the processor, the sending moment of sending the random access response message, specifically:

With the first possible implementation manner of the fifth aspect, in a second possible implementation, if the random access response is sent by using a random access response message, the user equipments with different coverage enhancement levels are sent. And the sending, by the processor, the sending time of the random access response message, where the sending, according to the received random access preamble sequence, and the random access The sending mode of the incoming response determines that the sending time of the random access response message is n + k , where n is a pre-configured last number of subframes used to carry the random access preamble sequence, and k is an advance The configured subframe offset.

With reference to the first possible implementation manner of the fifth aspect, or the second possible implementation manner of the fifth aspect, in a third possible implementation manner, if the random access response is sent by using one The random access response message sends a random access response corresponding to the random access preamble sequence sent by the user equipment with different coverage enhancement levels, and the processor determines, according to the following manner, the scrambling code sequence for sending the one random access response: Determining a subframe index t_id used for scrambling the random access response message to be the same subframe number used by the user equipment having different coverage enhancement levels to transmit the random access preamble sequence Or, the number of the subframe used when the random access preamble sequence corresponding to the preset coverage enhancement level is transmitted; and,

With reference to the third possible implementation manner of the fifth aspect, in a fourth possible implementation manner, the processor determines a t _ id used for scrambling the scrambling code sequence for scrambling the one random access response message Specifically:

Combining the first possible implementation of the fifth aspect, or the second possible implementation of the fifth aspect, or the third possible implementation of the fifth aspect, or the fourth of the fifth aspect In a fifth possible implementation manner, if at least two of the user equipments use different random access resources to send the same random access preamble sequence, the processor is further configured to:

The second random access response message carries the second indication information, where the second indication information is used to indicate a random access preamble sequence sent by the user equipment with different coverage enhancement levels in the sent random access response message. Corresponding random access response. With reference to the fifth aspect, in a sixth possible implementation manner, if the random access response is sent by using different random access response messages, respectively, the random access preamble sent by the user equipment with different coverage enhancement levels is sent. And determining, by the processor, the number of repetitions required to send the random access response corresponding to the random access preamble sequence sent by each user equipment, where the processor includes:

Determining, according to a random access preamble sequence sent by each user equipment, a coverage enhancement level of each of the user equipments; and determining, according to a correspondence between a coverage enhancement level and a random access response repetition number, each of the users The number of repetitions of the random access response message corresponding to the random access preamble sequence sent by the device.

With reference to the sixth possible implementation manner of the fifth aspect, in a seventh possible implementation, the determining, by the processor, the random access response corresponding to the random access preamble sequence sent by each user equipment The parameter information includes:

With reference to the seventh possible implementation manner of the fifth aspect, in an eighth possible implementation, the determining, by the processor, a random access response message corresponding to the random access preamble sequence sent by each user equipment Different sending moments, including:

With reference to the seventh possible implementation manner of the fifth aspect, in a ninth possible implementation, the determining, by the processor, the random access corresponding to the random access preamble sequence sent by each user equipment The scrambling sequence of the response message specifically includes: Determining, by using the t_id used for scrambling the random access sequence calculation corresponding to the random access preamble sequence sent by each of the user equipments, when each of the user equipments sends a random access preamble sequence The number of the different subframes used; and / or,

In conjunction with the first possible implementation of the fifth aspect, or the sixth possible implementation of the fifth aspect, in a tenth possible implementation manner,

The determining, by the processor, the coverage enhancement level of the user equipment, specifically includes:

Determining, according to a frequency domain location of the random access resource of the random access preamble sequence sent by each of the user equipments, a coverage enhancement level of the user equipment that sends the random access preamble sequence, where, in the random access process The used random access resource is divided into multiple resource groups in the frequency domain, and each resource group corresponds to a different coverage enhancement level; or

Determining, according to a time domain location of the random access resource of the random access preamble sequence sent by each of the user equipments, a coverage enhancement level of the user equipment that sends the random access preamble sequence, where, in the random access process The used random access resources are divided into multiple resource groups in the time domain, and each resource group corresponds to a different coverage enhancement level.

In a sixth aspect, a user equipment includes:

a transceiver, configured to send a random access preamble sequence to the base station, and indicate its own coverage enhancement level by using the random access preamble sequence;

a processor, configured to determine, according to a sending manner of the random access response, before receiving the random access Deriving the parameter information required by the random access response message corresponding to the sequence; and triggering the transceiver to receive the parameter according to the processor, and receiving the random access response repetition number corresponding to the coverage enhancement level of the self, Random access response message;

The sending mode includes: using a random access response message to send a random access response corresponding to the random access preamble sequence sent by the user equipments with different coverage enhancement levels, or separately sending the packets by using different random access response messages. a random access response corresponding to the random access preamble sequence sent by the user equipment of the different coverage enhancement level; the parameter information includes: time-frequency resource information used to carry the random access response message, and a receiving time of the random access response message, And at least one of the scrambling code sequences for descrambling the random access response message.

With reference to the sixth aspect, in a first possible implementation manner, the processor is specifically configured to: determine a random access preamble sequence group corresponding to a coverage enhancement level of the self, and determine the random access preamble sequence group from the determined Selecting a random access preamble sequence, and transmitting the selected random access preamble sequence to the base station, where each random access preamble sequence group corresponds to a different coverage enhancement level, and each random access preamble sequence group includes At least one pre-configured random access preamble sequence and different random access preamble sequences included in different random access preamble sequence groups are different; or determining a frequency domain position corresponding to its own coverage enhancement level, in the determined frequency domain position Sending a random access preamble sequence to the base station, where the random access resource used in the random access process is divided into multiple resource groups in the frequency domain, and each resource group corresponds to a different coverage enhancement level; or, determining and itself The coverage enhancement level corresponds to the time domain location, and is sent to the base station at the determined time domain location Machine access preamble sequence, wherein the random access resource in the random access procedure is used into a plurality of groups in the time domain resource, each resource group corresponding to a different coverage enhancement level.

With reference to the sixth aspect, or in combination with the first possible implementation manner of the sixth aspect, in the second possible implementation manner, if the random access response is sent in a manner that is different by using a random access response message And the random access response corresponding to the random access preamble sequence sent by the user equipment of the enhanced level, where the processor is specifically configured to:

Determining, according to the sending manner of the random access response, the received random access response cancellation The receiving time of the information is n+k, where n is the number of the last configured subframe for carrying the random access preamble sequence, and k is the pre-configured subframe offset.

With reference to the sixth aspect, or in combination with the first possible implementation manner of the sixth aspect, or the second possible implementation manner of the sixth aspect, in the third possible implementation manner, if the random access response The sending manner is to use a random access response message to send a random access response corresponding to the random access preamble sequence sent by the user equipment with different coverage enhancement levels, and the processor determines to receive the random access response. The scrambling sequence of the message specifically includes:

With reference to the third possible implementation manner of the sixth aspect, in a fourth possible implementation, the determining, by the processor, the scrambling code sequence used for descrambling the received one random access response message 1 _1 1 is specifically:

Combining the first possible implementation of the sixth aspect, or in combination with the second possible implementation of the sixth aspect, or in combination with the third possible implementation of the sixth aspect, or in combination with the fourth aspect of the sixth aspect In a fifth possible implementation manner, the processor is further configured to: determine, according to the received first indication information in the received random access response message, a random access response message corresponding to the random access preamble sequence sent by the user, where the first indication information is used to indicate that a random access response message received by the user equipment uses different random a random access response corresponding to the random access preamble sequence sent by the user equipment accessing the resource; or

With reference to the sixth aspect, or in combination with the first possible implementation manner of the sixth aspect, in a sixth possible implementation manner, if the random access response is sent by using different random access response messages, respectively The random access response corresponding to the random access preamble sequence sent by the user equipment with different coverage enhancement levels is used by the processor to:

With reference to the sixth aspect, or in combination with the first possible implementation manner of the sixth aspect, in a seventh possible implementation manner, if the random access response is sent by using different random access response messages, respectively a random access response corresponding to the random access preamble sequence sent by the user equipment with different coverage enhancement levels, the processor determining a scrambling code sequence of the random access response message corresponding to the random access preamble sequence for descrambling itself Specifically, including:

Determining the sc_code used for the scrambling sequence calculation of the random access response message corresponding to the random access preamble sequence for descrambling itself is the number of the subframe used when transmitting the random access preamble itself; and/or, Determining the f_id used by the scrambling code sequence corresponding to the random access preamble sequence for descrambling itself is the frequency domain information used when transmitting the random access preamble sequence by itself. DRAWINGS

1 is a schematic diagram of a method for implementing coverage enhancement of an MTC device in the background art;

2 is a schematic diagram of a method for transmitting a random access message according to an embodiment of the present invention; FIG. 3 is a schematic diagram of a first method for transmitting a preamble and a RAR message by using a code division manner according to an embodiment of the present invention;

4 is a schematic diagram of sending a preamble and a RAR message by using a code division method according to an embodiment of the present invention;

FIG. 5 is a schematic diagram of a third method for transmitting a preamble and a RAR message by using a code division manner according to an embodiment of the present invention;

FIG. 6 is a schematic diagram of a first method for transmitting preamble and RAR messages in a frequency division manner according to an embodiment of the present invention;

FIG. 7 is a schematic diagram of a second method for transmitting preamble and RAR messages in a frequency division manner according to an embodiment of the present invention;

FIG. 8 is a schematic diagram of a first method for transmitting a preamble and a RAR message in a time division manner according to an embodiment of the present invention;

FIG. 9 is a schematic diagram of a second method for transmitting preamble and RAR messages in a time division manner according to an embodiment of the present invention;

FIG. 10 is a schematic diagram of another method for transmitting a random access message according to an embodiment of the present invention; FIG. 11 is a schematic diagram of a network device according to an embodiment of the present invention;

FIG. 12 is a schematic diagram of a user equipment according to an embodiment of the present disclosure;

FIG. 13 is a schematic diagram of another network device according to an embodiment of the present disclosure;

FIG. 14 is a schematic diagram of another user equipment according to an embodiment of the present invention. detailed description

In order to implement the coverage enhancement, the embodiment of the present invention provides a method for transmitting a random access message when the signal repetition mode is adopted, and the method can be applied to a Long Term Evolution (LTE) system and a wideband code division multiple access (Wideband). Code Division Multiple Access (WCDMA) System, High Speed Packet Access (HSPA) system, or Time Division-Synchronous Code Division Multiple Access (TD-SCDMA) system.

Referring to FIG. 2, a method for transmitting a random access message according to an embodiment of the present invention includes the following steps:

S21: Receive a random access preamble sequence sent by the user equipment, and determine a random access response corresponding to the random access preamble sequence sent by each user equipment.

The random access response RAR corresponding to the random access preamble sequence sent by the user equipment includes an uplink synchronization time advance TA value and/or a suitable transmit power for implementing the uplink synchronization of the user equipment.

In the embodiment of the present invention, the user equipments with different coverage enhancement levels include the following two situations: First, the coverage enhancement level of the user equipment that sends the random access preamble sequence to the base station is different, for example, there are three user equipments (recorded as UE1, UE2, and UE3) send a random access preamble to the base station, the coverage enhancement level of UE1 is Coverage Improvement level (CI level) 1, and the coverage enhancement level of UE2 is CI level2, and coverage of UE3. The enhancement level is CI leve, that is, the coverage enhancement levels of the three user equipments are different; the second is that the coverage enhancement level of the user equipment that sends the random access preamble sequence to the base station is different, for example, there are three user equipments (recorded as UE1) The UE2 and the UE3) send a random access preamble sequence to the base station, the coverage enhancement level of the UE1 is CI level1, the coverage enhancement level of the UE2 is CI level1, and the coverage enhancement level of the UE3 is CI level2, that is, the coverage enhancement of the three user equipments. The grades are not the same.

S22. Determine, according to the received random access preamble sequence sent by the user equipment, and the sending manner of the random access response, parameter information required to send the random access response sequence corresponding to the received random access preamble sequence;

The method for transmitting the random access response may be configured in the coverage enhancement configuration information. The coverage enhancement configuration information may be configured by the network side and sent to the user equipment, or may be agreed by the network side and the user equipment side and stored separately. It can be specified in the protocol and pre-configured to the network side and the user equipment side.

Further, the coverage enhancement configuration information further includes coverage of random access resources in the enhanced scenario. Information such as information involved in the process of sending and receiving random access messages.

In the embodiment of the present invention, the method for sending the random access response includes the following two methods: Method 1: Sending a random access corresponding to the random access preamble sequence sent by the user equipment with different coverage enhancement levels by using a random access response message In response, the random access response corresponding to the random access preamble sequence sent by the user equipment with different coverage enhancement levels is encapsulated and sent in a random access response message;

In this manner, the random access response corresponding to the random access preamble sequence sent by the user equipments with different coverage enhancement levels is encapsulated in a random access response message, thereby reducing the transmission overhead of the random access response message. , saving network resources.

Manner 2: The random access response message corresponding to the random access preamble sequence sent by the user equipment with different coverage enhancement levels is sent by using different random access response messages, that is, different coverage enhancement levels are independently transmitted by using different random access response messages. The random access response corresponding to the random access preamble sequence sent by the user equipment.

In the embodiment of the present invention, the determined parameter information required for sending a random access response of the user equipment includes:

Time-frequency resource information for carrying the random access response message, the number of repetitions of the random access response message, the transmission time of the random access response message, and the 4 y code sequence for scrambling the random access response message sent by the base station At least one of the information.

Preferably, the scrambling code sequence may be a Random Access-Radio Network Temporary Identity (RA-RNTI).

S23. Send a random access response to the user equipments with different coverage enhancement levels according to the determined parameter information according to the manner in which the random access response is sent.

In the embodiment of the present invention, the execution entity of the foregoing method is a base station, and specifically may be a macro base station, a micro base station, or a control device, and the like.

In the embodiment of the present invention, the random access preamble sequence sent by the user equipment is received, and the random access response corresponding to the random access preamble sequence sent by each user equipment is determined; according to the received random access preamble sequence sent by the user equipment. And the transmission method of the random access response, determining the transmission and reception And the parameter information required for the random access response sequence corresponding to the random access preamble sequence; and sending the corresponding random access to the user equipments with different coverage enhancement levels according to the determined parameter information according to the sending manner of the random access response In response, coverage enhancement with signal repetition is achieved.

In the embodiment of the present invention, one subframe is used to transmit only one random access preamble sequence or one random access response message.

In the embodiment of the present invention, in step S22, determining, according to the received random access preamble sequence sent by the user equipment with different coverage enhancement levels, and the sending manner of the random access response, determining, corresponding to the received random access preamble sequence The number of repetitions of the random access response message includes: 1. If the method for transmitting the random access response configured in the coverage enhancement configuration information is the foregoing mode 1, the user with different coverage enhancement levels is sent by using a random access response message. The random access response corresponding to the random access preamble sequence sent by the device is: determining, according to the received random access preamble sequence sent by each user equipment, a coverage enhancement level of each user equipment; and, according to the coverage enhancement level And the number of repetitions of the random access response corresponding to the largest coverage enhancement level in the determined coverage enhancement level, and the number of repetitions of sending the random access response message.

For example, it is assumed that the user equipment 1 (the coverage enhancement level is level1) and the user equipment 2 (the coverage enhancement level is level 2) respectively send a preamble to the base station, and after receiving the preamble sent by the user equipment 1 and the user equipment 2, the base station The random access preamble sequence group to which the preamble belongs determines that the coverage enhancement levels of the user equipment 1 and the user equipment 2 are level1 and level2, respectively, and determines the number of repetitions of the preamble corresponding to level1 and level2 according to the correspondence between the coverage enhancement level and the repetition number. The repetition times of rl and r2, respectively, and the corresponding random access response RAR are R1 and R2, respectively (assuming R2>R1). The configuration in the coverage enhancement configuration information uses the foregoing manner to send a random access response. Therefore, the base station sends a random access response that encapsulates the random access response corresponding to the random access preamble sequence sent by the user equipment 1 and the user equipment 2 according to the R2. Message.

The number of repetitions corresponding to the maximum coverage enhancement level is used as the repetition number of the random access response message, so that each user equipment can effectively receive the random access response message, and each user equipment according to its own Duplicate random access response corresponding to the coverage enhancement level The number of times, receiving the one random access response message sent by the base station.

If the method for transmitting the random access response configured in the coverage enhancement configuration information is the second mode, the random access response message sent by the user equipment with different coverage enhancement levels is respectively sent by using the random access response message. a random access response, determining: a coverage enhancement level of each user equipment according to a random access preamble sequence sent by each user equipment; and determining, according to a correspondence between the coverage enhancement level and the random access response repetition number, The number of repetitions corresponding to the random access response corresponding to the random access preamble sequence of the user equipment. Further, the random access response message corresponding to the random access preamble sequence of the user equipment is sent according to the repetition number corresponding to the random access response corresponding to the random access preamble sequence of each user equipment.

In the embodiment of the present invention, in step S22, determining, according to the received random access preamble sequence and the random access response sending manner, the random access corresponding to the random access preamble sequence of each user equipment is sent. When the response time of the response and the scrambling code sequence of the random access response corresponding to the random access preamble sequence of each user equipment are scrambled, not only the received random access preamble sequence transmitted by the user equipment but also the random connection need to be considered. In the manner of sending the incoming response, it is also necessary to consider how the random access preamble sequence indicates different coverage enhancement levels. The following describes in detail how to determine the transmission time of the random access response corresponding to the random access preamble sequence sent by the user equipment, and the scrambling code sequence used to scramble the random access response corresponding to the random access preamble sequence sent by the user equipment.

In the embodiment of the present invention, the random access preamble sequence may indicate different coverage enhancement levels in any of the following pre-configured manners:

Mode 1, the random access preamble sequence indicates different coverage enhancement levels in a code division manner; in this manner, the pre-configured random access preamble sequence is divided into multiple random access preamble sequence groups, and each random access preamble sequence group Corresponding to a different coverage enhancement level, each random access preamble sequence group includes at least one pre-configured random access preamble sequence and different random access preamble sequences included in different random access preamble sequence groups are different.

Preferably, the number of random access preamble sequence groups may be determined according to a maximum coverage enhancement level that the base station can support, such that the number of random access preamble sequence groups is not supported by the base station. Maximum coverage enhancement level.

For example, assuming that the maximum coverage enhancement level supported by the base station is 3, that is, CI level 3, the pre-configured random access preamble sequence preamble can be divided into three random access preamble sequence groups, which are denoted as cl, c2, c3, The user equipment covering the enhancement level i selects the preamble in the random access preamble sequence group ci (i=l, 2, 3).

In this manner, after receiving the random access preamble sequence sent by the user equipment, the coverage enhancement level of the user equipment is determined according to the random access preamble sequence group to which the random access preamble sequence of the user equipment belongs.

In this mode, the manner in which the random access response is sent is different, and the manner of determining the parameter information required for the random access response corresponding to the random access preamble sequence of the user equipment is different.

First, if the transmitted random access response for the embodiment described above one, i.e. using a random access response in response to the random access corresponding to the random access preamble sequence transmitted message having a different user equipment transmitted enhancement level covering, shell ¹ J:

In step S23, according to the determined parameter information, according to the sending manner of the random access response, the random access response is sent to the user equipments with different coverage enhancement levels, specifically:

And sending, according to the determined parameter information, a random access response message of the random access response corresponding to the random access preamble sequence sent by the user equipment with different coverage enhancement levels to the user equipment with different coverage enhancement levels.

In this manner, the parameter information required to determine the random access response corresponding to the random access preamble sequence of the user equipment is:

And determining, according to the received random access preamble sequence sent by the user equipment, and the sending manner of the random access response, the sending moment of sending the random access response message, specifically:

Determining that the sending moment of sending the random access response message is n + k , where n is a pre-configured last number of subframes used to carry the random access preamble sequence, and k is a pre-configured subframe offset the amount.

It should be noted that the last subframe used to carry the random access preamble sequence refers to, Among the periodic random access resources, the last one is used to carry the subframe of the random access preamble sequence. For example, as shown in FIG. 3, the first schematic diagram of transmitting preamble and RAR messages by using a code division manner, the time-frequency resources used by the preambles having different coverage enhancement levels in FIG. 3 are overlapped, and FIG. 3 adopts a separate manner. In order to facilitate the representation of preambles with different coverage enhancement levels sent by different user equipments. The user equipment 1 of the coverage enhancement level 1 and the user equipment 2 of the coverage enhancement level 2 in FIG. 3 are the same and both are the start subframes of the preamble, and the end subframe of the user equipment 1 transmits the preamble, and the user equipment 2 transmits the preamble. The end subframe is η ₂ , and n ₃ is the end subframe of the preamble covering the enhancement level 3. In this embodiment, the user equipment not covering the enhancement level 3 sends the preamble to the base station, and the base station determines the sending of the random access response message. The time is n ₃ + k. The user equipment 1 and the user equipment 2 can calculate the time of receiving the random access response message by using the end subframe of the preamble, which is specifically: the receiving moment of the random access response message determined by the user equipment 1 to ^{^{+ Ι ^, k i = n}} 3 _ n i + k; the message is a random access response reception time is determined by the user equipment 2 _{n 2 + 1 ^, = n} 3 _ n 2 + k.

FIG. 4 is a schematic diagram of transmitting a preamble and a RAR message in a code division manner, and the time-frequency resources used by the preambles of different coverage enhancement levels in FIG. 4 are overlapped, and FIG. 4 is separately used for convenience. Preamble ₀ of different coverage enhancement levels sent by different user equipments. The user equipment 1 of the coverage enhancement level 1 and the end equipment of the coverage enhancement level 2 of the user equipment 2 of the coverage enhancement level 2 are the same and are all n, and the user equipment 1 sends the preamble. starting subframe 2 to the user equipment transmits a preamble to the starting subframe n _2, n ₃ so as to cover the starting subframe preamble enhancement level 3, the present embodiment does not cover the enhancement level of the user equipment to the base station 3 Preamble, the base station determines that the sending moment of the one random access response message is n + k; correspondingly, the user equipment 1 and the user equipment 2 determine that the receiving moment of the one random access response message is also n+k.

2. According to the received random access preamble sequence sent by the user equipment and the random access response The sending mode, determining the scrambling code sequence for sending the random access response message, specifically: determining that the t_id used for calculating the scrambling code sequence used to scramble the one random access response message is a user equipment with different coverage enhancement levels. The number of the same subframe used when transmitting the random access preamble sequence, or the number of the subframe used when transmitting the random access preamble sequence corresponding to the preset coverage enhancement level;

Determining, by using the f_id used for scrambling the random access response message, the same frequency domain information used by the user equipment with different coverage enhancement levels to send the random access preamble sequence, The code points are used to indicate different coverage enhancement levels. Therefore, the frequency domain information used by different random access preamble sequences is the same.

In the existing protocol, the scrambling code sequence used is RA-RNTI, and the scrambling code sequence is calculated as follows:

RA- ΚΝΉ = l + t _id + 10* f _id;

Where t _ id is the subframe number of the physical random access channel (PRACH) time-frequency resource used, and the range is 0 ≤ t _id < 10 , and f _id is the frequency domain of the used PRACH Information, whose range is 0 ≤ f _ id < 6.

Preferably, if the starting subframes of the random access preamble sequence sent by the user equipments with different coverage enhancement levels are the same, determining the t_id used for calculating the scrambling code sequence used to scramble the one random access response message is The user equipments of different coverage enhancement levels send the same starting subframe number of the random access preamble sequence. As shown in FIG. 3, the determined _1_1 is the same starting subframe for the user equipment 1 and the user equipment 2 to send the preamble. Number n;

If the end subframes of the random access preamble sequence are the same for the user equipments with different coverage enhancement levels, determining that the t_id used for scrambling the scrambling code sequence for scrambling the one random access response message has different coverage enhancement levels The user equipment sends the number of the same end subframe of the random access preamble sequence, as shown in FIG. 4, the determined 1_1 1 is the number n of the same starting subframe that the user equipment 1 and the user equipment 2 send the preamble; If the start subframe and the end subframe when the user equipment with different coverage enhancement levels send the random access preamble sequence are different, determining the t used for calculating the scrambling code sequence for scrambling the one random access response message - id is the number of the starting subframe or the number of the ending subframe used when the pre-agreed random access preamble sequence is transmitted. For example, it is pre-agreed to use the number of the starting subframe or the number of the ending subframe of the random access preamble sequence in the random access preamble sequence group corresponding to the maximum or minimum coverage enhancement level as the 4th code sequence calculation. t _ id.

It should be noted that the correspondence between the coverage enhancement level and the random access preamble sequence group, and the time-frequency resources used by the random access preamble sequence in the random access preamble sequence group are pre-agreed as the scrambling code sequence. The used random access preamble sequence of the t-id can be configured in the coverage enhancement configuration information so that both the user equipment and the base station can obtain the above information.

In this mode, the user equipment of different coverage levels can use the same time-frequency resource when transmitting the random access preamble sequence, and the same-sized time-frequency resource can send a random access preamble sequence with a high coverage enhancement level. Multiple random access preamble sequences with low coverage enhancement level can be sent. As shown in FIG. 5, on the 15 times of repeated time-frequency resources covering the enhancement level 3, 10 pre-preambles covering the enhancement level 2 can be simultaneously transmitted. It is also possible to simultaneously deliver three 5 repeating preambles covering the enhancement level 1. Figure 5 can be seen as an extension of the situation shown in Figure 4.

In the scenario shown in FIG. 5, if the RARs of the four sets of preambles whose end subframe n11, the end subframe is nl2, and the end time of nl3 are encapsulated in the same RAR message, there may be three coverage enhancement level 1 The preambles selected by the user equipments are the same. In this case, the preamble identifiers carried in the RAR message are the same for the three sets of preambles that cover the enhanced level 1. Thus, the user equipment that sent the three sets of preambles receives the RAR message. After that, it is impossible to distinguish whether the RAR corresponding to the three sets of preambles included in the RAR message is a random access response of its own preamble.

Preferably, in this manner, if at least two user equipments use different random access resources to send the same random access preamble sequence, the method further includes:

Carrying the first indication information in the one random access response message, where the first indication information The information is used to indicate a random access response corresponding to the random access preamble sequence sent by the user equipment of different random access resources (for example, time-frequency resources) in the received random access response message.

For example, the first indication information that carries two bits in the RAR is used to distinguish the random access response corresponding to the preamble sent by the user equipment of the same coverage enhancement level, so that it can be used to distinguish four groups of preambles.

Of course, other methods may also be used to handle the preamble conflict, such as the user equipment reselecting the preamble and sending the newly selected preamble to the base station, so that the base station performs subsequent processing based on the newly received preamble.

2. If the random access response is sent in the above manner, the random access response message is used to separately send the random access response of the user equipment with different coverage enhancement levels, in step S23, according to the determined parameter. The information is sent to the user equipments with different coverage enhancement levels according to the sending manner of the random access response, which is specifically:

The random access response message corresponding to the random access preamble sequence sent by the user equipments with different coverage enhancement levels is sent to the corresponding user equipment according to the determined parameter information.

In this manner, determining parameter information required to send a random access response corresponding to the random access preamble sequence sent by each user equipment is specifically: according to the received random access preamble sequence of the user equipment and the sending of the random access response And determining, by using a random access preamble sequence sent by each user equipment, a different scrambling code sequence for scrambling the random access response message corresponding to the random access preamble sequence, and/or sending each user equipment The random access response message corresponding to the random access preamble sequence determines a different transmission time.

In this mode, since the random access response of each user equipment is separately sent by using different random access response messages, only the random access response messages of the user equipments with different coverage enhancement levels need different sending moments and different occupations. The frequency domain resources may be scrambled by using different scrambling code sequences, so as to ensure that random access response messages of user equipments with different coverage enhancement levels do not conflict. Of course, the transmission time of the random access response message and the scrambling code sequence of the user equipments having different coverage enhancement levels may also be different.

Further, according to the received random access preamble sequence of the user equipment and the random access response The sending manner of the random access response message corresponding to the random access preamble sequence sent by each user equipment is specifically determined to include:

Determining, the sending moment of the random access response message of each user equipment is A + k , where, for each user equipment, sending different starting subframes or different ending subframes used by the random access preamble sequence, k is pre-configured Subframe offset.

For example, the first schematic diagram of transmitting the preamble and the RAR message in the code division manner is shown in FIG. 3, and the sending time of the random access response message of the user equipment 1 is +k, and the random access of the user equipment 2 The transmission time of the response message is n ₂ + k.

For another example, the second mode shown in FIG. 4 is a schematic diagram of transmitting a preamble and a RAR message by using a code division manner, and the sending time of the random access response message of the user equipment 1 is l\ + k , and the random access response message of the user equipment 2 The transmission time is n ₂ + k.

Further, determining, according to the received random access preamble sequence of the user equipment and the sending manner of the random access response, the scrambling code sequence for scrambling the random access response message corresponding to the random access preamble sequence sent by each user equipment Specifically, including:

Determining the sc_code used for scrambling the random access response message corresponding to the random access preamble sequence sent by each user equipment is used to calculate the different sub-sent used by each user equipment to send the random access preamble sequence The number of the frame.

For example, the first schematic diagram of transmitting the preamble and the RAR message in the code division manner is shown in FIG. 3, and the end subframe used by the user equipment 1 and the user equipment 2 when transmitting the random access preamble sequence is different. Therefore, the 1_1_1 of the RA-RNTI used to scramble the random access response message of the user equipment 1 may be the number of the end subframe used by the user equipment 1 when transmitting the random access preamble sequence, for scrambling the user equipment. RA-RNTI random access response message 2 t _ id number n ₂ may be the end of the sub-user equipment 1 transmits a random access preamble sequence used in the frame.

As shown in FIG. 4, the second schematic diagram of transmitting the preamble and the RAR message in the code division manner is used as an example. The start used when the user equipment 1 and the user equipment 2 send the random access preamble sequence. The subframes are different. Therefore, the t_id of the RA-RNTI used to scramble the random access response message of the user equipment 1 may be the number of the starting subframe used when the user equipment 1 transmits the random access preamble sequence.

II! , RA-RNTI used for random access scrambling user equipment response message 2 t _ id may be user equipment 1 transmits a random access preamble sequence used starting subframe number n _2.

In the mode 2, the random access preamble sequence indicates different coverage enhancement levels in a frequency division manner. In this mode, the pre-configured random access resources (that is, the random access resources used in the random access process, the random access) The configuration information of the resource may be configured in the coverage enhancement configuration information, so that both the base station and the user equipment can obtain the configuration information, and are divided into multiple resource groups in the frequency domain, and each resource group corresponds to a different coverage enhancement level.

Preferably, the number of resource groups may be determined according to a maximum coverage enhancement level that the base station can support, such that the number of resource groups is not less than a maximum coverage enhancement level that the base station can support.

For example, if the maximum coverage enhancement level (CI level ) supported by the base station is 3, that is, CI leve, the pre-configured random access resources may be divided into three resource groups in the frequency domain, and the first resource group fl (The frequency domain of each random access resource in the resource group is fl) corresponding to the coverage enhancement level 1, and the second resource group f2 (the frequency domain of each random access resource in the resource group is f2) corresponding to the coverage enhancement level 2, And the second resource group f3 (the frequency domain of each random access resource in the resource group is β) corresponding to the coverage enhancement level 3, and the user equipment with the coverage enhancement level i is selected to be sent on the random access resource corresponding to the frequency domain fi Preamble.

In this mode, the manner in which the random access response configured in the coverage enhanced configuration information is sent is different, and the manner of determining the parameter information required for the random access response corresponding to the random access preamble sequence of the user equipment is different.

If the method for transmitting the random access response configured in the coverage enhancement configuration information is the foregoing mode 1, the random access response message is used to send the random access preamble sequence corresponding to the user equipment with different coverage enhancement levels. In response, then:

In step S23, according to the determined parameter information, according to the sending manner of the random access response, the random access response is sent to the user equipments with different coverage enhancement levels, specifically: And sending, according to the determined parameter information, a random access response message of the random access response corresponding to the random access preamble sequence sent by the user equipment that is encapsulated with different coverage enhancement levels to the user equipment of the different coverage enhancement level.

In this mode, the parameter information required to determine the random access response of the sending user equipment is specifically:

And determining, according to the received random access preamble sequence of the user equipment and the sending manner of the random access response, the sending moment of sending the random access response message, specifically:

Determining that the sending time of the one random access response message is n + k , where n is a pre-configured last number of subframes used to carry the random access preamble sequence, and k is a pre-configured subframe offset. For details, refer to the description in the code division mode.

And determining, according to the received random access preamble sequence of the user equipment and the sending manner of the random access response, the scrambling code sequence for sending the random access response message, specifically:

Determining, by using the subframe index t_id used for scrambling the random access response message for scrambling the one random access response message, the number of the same subframe used by the user equipment with different coverage enhancement levels to transmit the random access preamble sequence, Alternatively, the number of the subframe used when the random access preamble sequence corresponding to the preset coverage enhancement level is sent may be specifically described in the code division manner; and determined to scramble the random access response. The frequency domain index f _id used for the scrambling sequence calculation of the message is the frequency domain information used when transmitting the random access preamble sequence corresponding to the preset coverage enhancement level. In this mode, different coverage is indicated by using the frequency division indication. The level of enhancement, therefore, the frequency domain information used by different random access preamble sequences is different.

Preferably, the frequency domain information used for transmitting the random access preamble sequence in the random access preamble sequence group corresponding to the maximum or minimum coverage enhancement level is pre-agreed as f _id used for the scrambling code sequence calculation.

For example, as shown in FIG. 6, the first schematic diagram of transmitting preamble and RAR messages in a frequency division manner, the frequency domain resources used by the preambles of different coverage enhancement levels in FIG. 6 are not overlapped. The user equipment 1 of the coverage enhancement level 1 and the user equipment 2 of the coverage enhancement level 2 in FIG. 6 are the same and both are the start subframes of the preamble, and the end subframe of the user equipment 1 transmitting the preamble is The user equipment 2 sends the preamble's end subframe to n ₂ , and n ₃ is the end subframe of the preamble that covers the enhanced level 3. In this embodiment, the user equipment that does not cover the enhanced level 3 sends the preamble to the base station, and the base station determines the one. The transmission time of the random access response message is n ₃ + k. For the user equipment 1 and the user equipment 2, the time at which the random access response message is received may be calculated by the end subframe of the preamble, which is specifically: the receiving moment of the random access response message determined by the user equipment 1 is _{ι¾ + 1 ^, k 1 =} n 3 - ^ + k; 2 determined that a received random access response message to the user equipment in time _{_{n 2 + k 2, 1¾ =}} n 3 _ n 2 + k.

The second schematic diagram of transmitting the preamble and the RAR message in the frequency division manner is shown in FIG. 7. The frequency domain resources used by the preambles of different coverage enhancement levels in FIG. 7 are not overlapped. The user equipment 1 of the coverage enhancement level 1 and the user equipment 2 of the coverage enhancement level 2 in FIG. 7 are the same and both are the end subframes of the preamble, and the user equipment 1 sends the preamble start subframe to the user equipment 2 to send the preamble. The start subframe is n ₂ , and n ₃ is the start subframe of the preamble covering the enhancement level 3. In this embodiment, the user equipment not covering the enhancement level 3 sends the preamble to the base station, and the base station determines the random access response message. The sending time is n + k ; correspondingly, the user equipment

1 and the user equipment 2 determines that the reception time of the one random access response message is also n+k.

In this mode, the user equipments with different coverage enhancement levels may select the same random access preamble sequence. Since the random access response message is sent in the first manner, the user equipments with different coverage enhancement levels are received by the base station. After the random access response message, it is impossible to distinguish whether it is a random access response for the random access preamble sequence sent by itself. Preferably, in the embodiment of the present invention, in step S23, a random access response message of the random access response of the user equipment encapsulated with different coverage enhancement levels is sent to the different coverage enhancement level according to the determined parameter information. User equipment, also includes:

The second random access response message carries the second indication information, where the second indication information is used to indicate a coverage enhancement level corresponding to each random access response encapsulated by the one random access response message.

For example, setting two-bit indication information can be used to distinguish four different sets of coverage. The enhanced level preamble, such as "00" indicates that the coverage enhancement level corresponding to the random access response is levell, "01" indicates that the coverage enhancement level corresponding to the random access response is leve2, and "10" indicates the random access. The coverage enhancement level corresponding to the response is leve3, and "11" indicates that the coverage enhancement level corresponding to the random access response is leve4 and the like.

If the method for transmitting the random access response configured in the coverage enhancement configuration information is the foregoing mode 2, the random access response message sent by the user equipment with different coverage enhancement levels is randomly sent by using different random access response messages. In response, then:

The random access response messages corresponding to the user equipments with different coverage enhancement levels are respectively sent to the corresponding user equipments according to the determined parameter information.

In this manner, the parameter information required to determine the random access response of the user equipment is specifically: according to the received random access preamble sequence of the user equipment and the sending manner of the random access response, the random transmission is sent for each user equipment. The access preamble sequence determines a different scrambling code sequence for scrambling the random access response message corresponding to the random access preamble sequence, and/or a random corresponding to the random access preamble sequence sent by each user equipment The access response message determines a different transmission time.

In this mode, the frequency domain information used by the user equipments of different coverage enhancement levels is different when used in the random access preamble sequence. Therefore, the random access response message used to scramble the user equipment of different coverage enhancement levels is used. The f_id used in the scrambling sequence calculation is different.

Further, determining, according to the random access preamble sequence sent by each user equipment and the sending manner of the random access response, the sending moment of the random access response message corresponding to the random access preamble sequence sent by each user equipment is A + k For each user equipment, a different starting subframe or a different ending subframe used by the random access preamble sequence is sent, where k is a pre-configured subframe offset. For details, refer to the description in the code division mode.

Manner 3: The random access preamble sequence indicates different coverage enhancement levels in a time division manner; In this manner, the pre-configured random access resource (that is, the random access resource used in the random access process, the configuration information of the random access resource may be configured in the coverage enhancement configuration information, so that the base station and the user equipment Each of the resource groups can be divided into multiple resource groups in the time domain, and each resource group corresponds to a different coverage enhancement level.

For example, if the maximum coverage enhancement level (CI level ) supported by the base station is 3, that is, CI leve, the pre-configured random access resources may be divided into three resource groups in the time domain, and the first resource group tl (The transmission time of each random access resource in the resource group is t1) corresponding to the coverage enhancement level 1, and the second resource group t2 (the transmission time of each random access resource in the resource group is t2) corresponding to the coverage enhancement level 2, And the second resource group t3 (the transmission time of each random access resource in the resource group is t3) corresponding to the coverage enhancement level 3, and the user equipment with the coverage enhancement level i selects to send the preamble on the random access resource corresponding to the ti.

If the method for transmitting the random access response configured in the coverage enhancement configuration information is the foregoing mode 1, the random access response message corresponding to the random access preamble sequence sent by the user equipment with different coverage enhancement levels is sent by using a random access response message. Response, Bay ¹ J:

In step S23, according to the determined parameter information, the random access response is sent to the user equipment according to the sending manner of the random access response, which is specifically:

And sending, according to the determined parameter information, a random access response message of the random access response corresponding to the random access preamble sequence sent by the user equipment that is encapsulated with different coverage enhancement levels to the user equipment of the different coverage enhancement level.

Determining that the sending time of sending the random access response message is n + k , where n is a pre- The last configured sub-frame number used to carry the random access preamble sequence, and k is a pre-configured sub-frame offset. For details, refer to the description in the code division mode.

Determining a subframe index t_id used for scrambling the scrambling code sequence for scrambling the one random access response message is a number of a subframe used when transmitting the random access preamble sequence corresponding to the preset coverage enhancement level In this mode, since the time division is used to indicate different coverage enhancement levels, different random access preamble sequences are transmitted at different times; and,

Determining, by using the frequency domain index f _ id used for scrambling the random access response message, the same frequency domain information used by the user equipment of different coverage enhancement levels to send the random access preamble sequence, or The frequency domain information used when the random access preamble sequence corresponding to the preset coverage enhancement level is transmitted.

Preferably, the subframe index t_id used for scrambling the scrambling code sequence used to scramble the one random access response message is the start of the random access preamble corresponding to the maximum or minimum coverage enhancement level. The number of the subframe or the number of the end subframe.

For example, as shown in FIG. 8 , the first schematic diagram of transmitting preamble and RAR messages in a time division manner, the time domain resources used by the preambles of different coverage enhancement levels in FIG. 8 are not overlapped. The transmission time of the preamble of the user equipment 1 covering the enhancement level 1 in FIG. 8 is t1, the transmission time of the preamble of the user equipment 2 covering the enhancement level 2 is t2, and the end subframe of the user equipment 1 transmitting the preamble is _ηι , the user equipment 2 The end subframe of the preamble is n ₂ , and n ₃ is the end subframe of the preamble that covers the enhancement level 3. In this embodiment, the user equipment that does not cover the enhancement level 3 sends the preamble to the base station, and the base station determines the random access response. The message is sent at n ₃ + k. For the user equipment 1 and the user equipment 2, the time at which the random access response message is received may be calculated by the end subframe of the preamble, which is specifically: the receiving moment of the random access response message determined by the user equipment 1 Is + l , k^^ - ^ + k ; user The receiving moment of the one random access response message determined by the device 2 is n ₂ + k ₂ , = η ₃ _ η ₂ + k. In this mode, the user equipments of different coverage enhancement levels may select the same random access preamble sequence, and the random access response message is sent by using the mode 1 in this manner, so that the user equipments with different coverage enhancement levels receive the random connection sent by the base station. After the response message is received, it is impossible to distinguish whether it is a random access response for the random access preamble sequence sent by itself. Preferably, in the embodiment of the present invention, in step S23, a random access response message of the random access response of the user equipment encapsulated with different coverage enhancement levels is sent to the different coverage enhancement level according to the determined parameter information. User equipment, also includes:

The second random access response message carries the second indication information, where the indication information is used to indicate a coverage enhancement level corresponding to each random access response encapsulated by the one random access response message, which may be referred to as a frequency division. Description in the way.

If the method for transmitting the random access response configured in the coverage enhancement configuration information is the foregoing mode 2, the random access response message sent by the user equipment with different coverage enhancement levels is randomly sent by using different random access response messages. In response, Bay ^:

In step S23, according to the determined parameter information, according to the sending manner of the random access response, the random access response is sent to the user equipment of different coverage enhancement levels, specifically:

The random access response messages corresponding to the user equipments of different coverage enhancement levels are respectively sent to the corresponding user equipments according to the determined parameter information.

In this manner, determining parameter information required for sending a random access response of the user equipment is: determining, according to the received random access preamble sequence of the user equipment and the sending manner of the random access response, determining a different for each user equipment. a scrambling code sequence for scrambling a random access response message corresponding to the random access preamble sequence sent by the user equipment, and/or a random access response corresponding to the random access preamble sequence sent by each user equipment The message determines a different moment of transmission.

In this mode, since the transmission times of the random access preamble sequences sent by the user equipments of different coverage enhancement levels are different, the randomness of the user equipment used to scramble different coverage enhancement levels is The t _ id used in the calculation of the access response message scrambling sequence is different.

Further, determining, according to a random access preamble sequence of each user equipment and a sending manner of the random access response, a sending moment of the random access response message corresponding to the random access preamble sequence sent by each user equipment, where each user is The device sends different start subframes or different end subframes used by the random access preamble sequence, where k is a pre-configured subframe offset. For details, refer to the description in the code division mode.

For example, the second schematic diagram of the preamble and the RAR message is sent in the time division manner as shown in FIG. 9, and the time domain resources used by the preambles of different coverage enhancement levels in FIG. 9 are not overlapped. The transmission time of the preamble of the user equipment 1 covering the enhancement level 1 in FIG. 9 is t1, the transmission time of the preamble of the user equipment 2 covering the enhancement level 2 is t2, and the end subframe of the user equipment 1 transmitting the preamble transmits the preamble to the user equipment 2. The ending subframe is n ₂ , the base station determines that the sending time of the random access response message corresponding to the random access preamble sequence sent by each user equipment is 13⁄4 + k; correspondingly, the user equipment 1 determines the preamble corresponding to the sending The receiving time of the random access response message is ⁿ i + ^k , and the receiving time of the random access response message corresponding to the preamble that the user equipment 2 determines is n ₂ + k.

Based on the same inventive concept, an embodiment of the present invention further provides a method for transmitting a random access message. Referring to FIG. 10, the method includes:

S101. Send a random access preamble sequence to the base station, and indicate its own coverage enhancement level by using the sent random access preamble sequence.

S102. Determine, according to a sending manner of the random access response, parameter information required for receiving the random access response message by itself.

The foregoing sending manner includes: using a random access response message to send a random access response corresponding to the random access preamble sequence sent by the user equipment with different coverage enhancement levels, or sending different coverages by using different random access response messages respectively. a random access response corresponding to the random access preamble sequence sent by the user equipment of the enhanced level; the foregoing parameter information includes: At least one of time-frequency resource information of the access response message, a reception time of the random access response message, and a scrambling code sequence for descrambling the random access response message.

Further, the method for transmitting the random access response may be configured in the coverage enhancement configuration information; the coverage enhancement configuration information may be configured by the network side and sent to the user equipment, or may be agreed by the network side and the user equipment side and stored separately. It can be specified in the protocol and pre-configured to the network side and the user equipment side.

Further, the coverage enhancement configuration information further includes information related to sending and receiving a random access message, such as configuration information of a random access resource in an enhanced scenario.

In the embodiment of the present invention, the parameter information required for the user equipment to receive the random access response message includes: time-frequency resource information for carrying the random access response message, the receiving time of the random access response message, and the descrambling random Accessing at least one of the scrambling code sequences of the response message.

S103. Receive, according to the determined parameter information, a random access response message sent by the base station according to a repetition quantity of the random access response corresponding to the coverage enhancement level of the network.

The execution body of the above method is a user equipment, and may be a mobile terminal, an MTC device, or the like.

In the embodiment of the present invention, the random access preamble sequence is sent to the base station, and the random access preamble sequence sent by the mobile station refers to its own coverage enhancement level. According to the transmission mode of the random access response, it is determined that it needs to receive the random access response. Parameter information; and receiving, according to the determined parameter information, a random access response message sent by the base station according to the repetition number of the random access response corresponding to the coverage enhancement level of the coverage enhancement level, thereby realizing the coverage enhancement using the signal repetition, thereby ensuring that the base station can The random access preamble sequence sent by each user equipment is effectively received, which also ensures that the terminal can effectively receive the base station to send a random access response.

In the implementation, the random access preamble sequence may indicate different coverage enhancement levels by means of code division, frequency division, and time division. In step S101, the random access preamble sequence is sent to the base station, which specifically includes the following three implementation manners:

1. The random access preamble sequence uses code division to indicate different coverage enhancement levels.

S101 is specifically:

Determining a random access preamble sequence group corresponding to its own coverage enhancement level, and determining from Selecting a random access preamble sequence in the random access preamble sequence group, and transmitting the selected random access preamble sequence to the base station, where each random access preamble sequence group corresponds to a different coverage enhancement level, and each random access The preamble sequence group includes at least one pre-configured random access preamble sequence and the random access preamble sequences included in different random access preamble sequence groups are different.

2. The random access preamble sequence uses frequency division mode to indicate different coverage enhancement levels, then steps

S101 is specifically:

Determining a frequency domain location corresponding to its own coverage enhancement level, and transmitting a random access preamble sequence to the base station in the determined frequency domain location, where the random access resources used in the random access procedure are divided in the frequency domain Multiple resource groups, each resource group corresponding to a different coverage enhancement level.

3. The random access preamble sequence uses different time division methods to indicate different coverage enhancement levels.

The S101 is specifically configured to: determine a time domain location corresponding to the coverage enhancement level of the UE, and send a random access preamble sequence to the base station in the determined time domain location, where the random access resource used in the random access process is The time domain is divided into multiple resource groups, and each resource group corresponds to a different coverage enhancement level.

It should be noted that the manner in which the random access preamble sequence specifically indicates that different coverage enhancement levels can be configured in the coverage enhancement configuration information.

In the implementation, according to different transmission modes of the random access response, the parameter information required for the base station to send the random access response determined in step S102 is also different, as follows:

The random access response is sent by using a random access response message to send a random access response corresponding to the random access preamble sequence of the user equipment with different coverage enhancement levels.

1. The receiving moment of receiving the random access response message is determined to be n + k according to the sending manner of the random access response, where n is the pre-configured last subframe used to carry the random access preamble sequence. The number, k is a pre-configured subframe offset. For details, refer to the description in the network side method.

It should be noted that the number of the last subframe used to carry the random access preamble sequence and the pre-configured subframe offset may be configured in the coverage enhancement configuration information, so that the network side The above information can be obtained from both the user equipment side.

2. Determine, according to the sending manner of the random access response, a scrambling sequence for descrambling the random access response message, specifically:

Determining, by using the t_id used for descrambling the scrambling code sequence of the one random access response message, the number of the same subframe used when the user equipment having different coverage enhancement levels sends the random access preamble sequence, or For the number of the subframe used by the random access preamble sequence corresponding to the preset coverage enhancement level, refer to the description in the network side method described above; and

Determining, using the f _ id used for the scrambling code sequence for descrambling the one random access response message, the same frequency domain information used when the user equipment with different coverage enhancement levels sends the random access preamble sequence, or For the frequency domain information used by the random access preamble sequence corresponding to the coverage enhancement level, refer to the description in the network side method.

Preferably, the t_id used by the above-mentioned scrambling code sequence for descrambling the one random access response message is specifically:

The user equipments with different coverage enhancement levels may select the same random access preamble sequence. To avoid conflicts between the random access preamble sequences of user equipments with different coverage enhancement levels, the method further includes:

Determining, according to the received first random access response message, the first indication information, the random access response corresponding to the random access preamble sequence sent by the random access response message, where the first indication information is And a random access response corresponding to the random access preamble sequence sent by the user equipment that uses different random access resources in a random access response message received by the user equipment.

2. The sending mode of the random access response is sent separately by using different random access response messages. The random access response corresponding to the random access preamble sequence sent by the user equipment with different coverage enhancement levels:

1. According to the sending manner of the random access response, determine that the receiving time of the random access response corresponding to the random access preamble sequence is A + k , where 1^ is the initial used by the self to send the random access preamble sequence. For a subframe or an end subframe, k is a pre-configured subframe offset. For details, refer to the description in the network side method.

2. Determining a scrambling sequence of the random access response message corresponding to the random access preamble sequence for descrambling itself, specifically including:

The t_id used by the scrambling code sequence for determining the random access response message corresponding to the random access preamble sequence for descrambling itself is the number of the subframe used when transmitting the random access preamble sequence by itself. For details, refer to the above. a description in the network side method; and/or,

Determining the frequency domain information used when the random access preamble sequence is used by the f_id id used for the scrambling code sequence corresponding to the random access preamble sequence for descrambling itself. For details, refer to the description in the network side method.

Based on the same inventive concept, a network device is also provided in the embodiment of the present invention. The principle of solving the problem is similar to the method for transmitting a random access message shown in FIG. 2, so the implementation of the device can refer to the method. The implementation, the repetition will not be repeated.

Referring to FIG. 11, the network device provided by the embodiment of the present invention includes:

The receiving module 111 is configured to receive a random access preamble sequence sent by the user equipment, and determine a random access response corresponding to the random access preamble sequence sent by each user equipment;

The processing module 112 is configured to determine, according to the received random access preamble sequence sent by the user equipment and the sending manner of the random access response, parameter information required for sending the random access response corresponding to the random access preamble sequence; and

The sending module 113 is configured to send, according to the parameter information determined by the processing module 112, a random access response to the user equipment according to the sending manner of the random access response;

The sending mode includes sending a different coverage enhancement by using a random access response message. a random access response corresponding to the random access preamble sequence sent by the user equipment of the level, or a random access response message corresponding to the random access preamble sequence sent by the user equipment with different coverage enhancement levels, respectively, using different random access response messages Determining the parameter information required for sending the random access response corresponding to the random access preamble sequence includes: time-frequency resource information for carrying the random access response message, number of repetitions of the random access response message, and random access response message And a transmission time, and at least one of a scrambling code sequence for scrambling the transmitted random access response message.

In an implementation, if the random access response is sent by using a random access response message to send a random access response corresponding to the random access preamble sequence sent by the user equipment of different coverage enhancement levels, the processing module 112 determines to send the random access response message. The sending moment of a random access response message includes:

Determining, according to a random access preamble sequence sent by the user equipment, a coverage enhancement level of the user equipment; and, according to a correspondence between the coverage enhancement level and the random access response repetition number, obtaining a maximum coverage enhancement level corresponding to the determined coverage enhancement level The number of repetitions, and as the number of repetitions of sending the random access response message.

Further, if the random access response is sent by using a random access response message to send a random access response corresponding to the random access preamble sequence sent by the user equipment with different coverage enhancement levels, the processing module 112 determines to send the random access response. The sending moment of the access response message specifically includes:

Determining, according to the received random access preamble sequence sent by the user equipment, and the sending manner of the random access response, that the sending time of the one random access response message is n + k, where n is the last configured pre-configuration The number of the subframe carrying the random access preamble sequence, where k is a pre-configured subframe offset.

Further, if the random access response is sent by using a random access response message to send a random access response corresponding to the random access preamble sequence sent by the user equipment of different coverage enhancement levels, the processing module 112 determines to send the method according to the following manner. a scrambling code sequence for a random access response: determining a subframe index used for scrambling the scrambling code sequence for scrambling the one random access response message t _ id is the number of the same subframe used by the user equipment of different coverage enhancement levels when transmitting the random access preamble sequence, or the child used when transmitting the random access preamble sequence corresponding to the preset coverage enhancement level The number of the frame; and,

Preferably, the processing module 112 determines that the t_id used in the scrambling code sequence calculation for scrambling the one random access response message is specifically:

The number of the same starting subframe or the number of the same ending subframe used by the user equipment of different coverage enhancement levels when transmitting the random access preamble sequence; or

Based on the foregoing embodiment, if at least two user equipments use different random access resources to send the same random access preamble sequence, the processing module 112 is further configured to:

The first random access response message carries the first indication information, where the first indication information is used to indicate that the random access preamble sequence sent by the user equipment that uses different random access resources in the received random access response message corresponds to Random access response, or,

The second random access response message carries the second indication information, where the second indication information is used to indicate that the random access preamble sequence sent by the user equipment with different coverage enhancement levels in the received random access response message corresponds to Random access response.

In an implementation, if the random access response is sent by using a different random access response message to respectively send a random access response corresponding to the random access preamble sequence sent by the user equipment with different coverage enhancement levels, the processing module 112 determines The number of repetitions required to send the random access response message corresponding to the random access preamble sequence sent by each user equipment includes:

Determining the coverage of each user equipment according to the random access preamble sequence sent by each user equipment And the number of repetitions of the random access response message corresponding to the random access preamble sequence sent by each user equipment is determined according to the correspondence between the coverage enhancement level and the random access response repetition number.

Further, if the random access response is sent by using a different random access response message to respectively send a random access response message corresponding to the random access preamble sequence sent by the user equipment of different coverage enhancement levels, the processing module 112 determines to send each The parameter information required for the random access response sequence corresponding to the random access preamble sequence sent by the user equipment, specifically includes: according to the received random access preamble sequence sent by the user equipment and the sending manner of the random access response, for each The random access preamble sequence sent by the user equipment determines a different scrambling code sequence for scrambling the random access response message corresponding to the random access preamble sequence, and/or a random access preamble sequence sent for each user equipment The corresponding random access response message determines a different transmission time.

Specifically, the processing module 112 determines a different sending moment for the random access response message corresponding to the random access preamble sequence sent by each user equipment, and specifically includes:

The sending time of the random access response message corresponding to the random access preamble sequence sent by each user equipment is A + k , where different starting subframes used by the random access preamble sequence are sent or different for each user equipment. End the subframe, k is the pre-configured subframe offset.

Specifically, the processing module 112 determines a scrambling code sequence for scrambling the random access response message corresponding to the random access preamble sequence sent by each user equipment, and specifically includes:

Determining the sc_code used for scrambling the random access response message corresponding to the random access preamble sequence sent by each user equipment is used to calculate the different sub-sent used by each user equipment to send the random access preamble sequence The number of the frame; and/or,

Determining the sc_s id used for scrambling the random access response message corresponding to the random access preamble sequence sent by each user equipment is different for each user equipment to use the random access preamble sequence Frequency domain information.

In the implementation, the processing module 112 determines the coverage enhancement level of the user equipment, and specifically includes: according to the random access preamble sequence group to which the random access preamble sequence sent by the user equipment belongs, a coverage enhancement level of the user equipment that sends the random access preamble sequence, where each random access preamble sequence group corresponds to a different coverage enhancement level, and each random access preamble sequence group includes at least one pre-configured random access. The preamble sequence and the random access preamble sequences included in the different random access preamble sequence groups are different; or

Determining, according to a frequency domain location of the random access resource that carries the random access preamble sequence sent by each user equipment, a coverage enhancement level of the user equipment that sends the random access preamble sequence, where the random access used in the random access procedure The incoming resource is divided into multiple resource groups in the frequency domain, and each resource group corresponds to a different coverage enhancement level; or

Determining, according to a time domain location of the random access resource that carries the random access preamble sequence sent by each user equipment, a coverage enhancement level of the user equipment that sends the random access preamble sequence, where the random access used in the random access procedure The incoming resource is divided into multiple resource groups in the time domain, and each resource group corresponds to a different coverage enhancement level.

Based on the same inventive concept, a user equipment is also provided in the embodiment of the present invention. The principle of solving the problem is similar to the method for transmitting a random access message shown in FIG. 10, so the implementation of the device can refer to the method. The implementation, the repetition will not be repeated.

Referring to FIG. 12, the user equipment provided by the embodiment of the present invention includes:

The sending module 121 is configured to send a random access preamble sequence to the base station, and indicate its own coverage enhancement level by using a random access preamble sequence;

The processing module 122 is configured to determine, according to a sending manner of the random access response, parameter information required to receive the random access response message corresponding to the random access preamble sequence; and

The receiving module 123 is configured to receive, according to the parameter information determined by the processing module 122, the random access response message sent by the base station according to the repetition number of the random access response corresponding to the coverage enhancement level of the coverage module 122, where the sending manner of the random access response includes Sending, by using a random access response message, a random access response corresponding to the random access preamble sequence sent by the user equipments with different coverage enhancement levels, or sending different coverage enhancement level user equipments by using different random access response messages. a random access response sequence corresponding to the random access preamble sequence;

The parameter information required to receive the random access response message corresponding to the random access preamble sequence includes: At least one of time-frequency resource information for carrying a random access response message, a reception time of the random access response message, and a scrambling code sequence for descrambling the random access response message.

In an implementation, the sending module 121 is specifically configured to:

Determining a random access preamble sequence group corresponding to its own coverage enhancement level, and selecting a random access preamble sequence from the determined random access preamble sequence group, and transmitting the selected random access preamble sequence to the base station, where Each random access preamble sequence group corresponds to a different coverage enhancement level, and each random access preamble sequence group includes at least one pre-configured random access preamble sequence and random access preambles included in different random access preamble sequence groups. Different sequences; or,

Determining a frequency domain location corresponding to its own coverage enhancement level, and transmitting a random access preamble sequence to the base station in the determined frequency domain location, where the random access resource used in the random access process is divided into multiple in the frequency domain a resource group, each resource group corresponding to a different coverage enhancement level; or, determining a time domain location corresponding to its own coverage enhancement level, and sending a random access preamble sequence to the base station in the determined time domain location, where, the random access The random access resources used in the incoming process are divided into multiple resource groups in the time domain, and each resource group corresponds to a different coverage enhancement level.

In the implementation, if the random access response is sent by using a random access response message to send a random access response corresponding to the random access preamble sequence of the user equipment with different coverage enhancement levels, the processing module 122 is specifically configured to:

Determining, according to the sending manner of the random access response, that the receiving time of receiving the random access response message is n + k, where n is a pre-configured last number of the subframe used to carry the random access preamble sequence, k is a pre-configured subframe offset.

In an implementation, if the random access response is sent by using a random access response message to send a random access response of the user equipment of different coverage enhancement levels, the processing module 122 determines that the descrambling receives the random access response message. The scrambling sequence includes:

Determining, by using the t_id used for descrambling the received random access response message, the t_id of the same subframe used by the user equipment of different coverage enhancement levels to transmit the random access preamble sequence, or , a random access preamble sequence corresponding to a preset coverage enhancement level The number of the subframe used when sending; and,

Determining the same frequency domain information used by the user equipment of the different coverage enhancement level to transmit the random access preamble sequence, or the f_id used for the scrambling code sequence calculation used to descramble the received one random access response message, or The frequency domain information used when the random access preamble sequence corresponding to the preset coverage enhancement level is transmitted.

Preferably, the processing module 122 determines that the t_id used for the scrambling code sequence calculation for descrambling the received one random access response message is specifically:

In an implementation, the processing module 122 is further configured to:

Determining, according to the received first random access response message, the first access information, the random access response corresponding to the random access preamble sequence sent by the random access response message, where the first indication information is used by the first indication information And a random access response corresponding to the random access preamble sequence sent by the user equipment that uses different random access resources in a random access response message received by the user equipment, or

Determining, according to the received random access response message, the second indication information, the random access response corresponding to the random access preamble sequence sent by the random access response message, where the second indication information is used by the second indication information And a random access response corresponding to the random access preamble sequence sent by the user equipment with different coverage enhancement levels in a random access response message received by the user equipment.

In an implementation, if the random access response is sent by using a random access response message to send a random access response of the user equipment with different coverage enhancement levels, the processing module 122 is specifically configured to:

Determining the corresponding random access preamble sequence according to the transmission mode of the random access response The receiving time of the machine access response is A + k , where the starting subframe or the ending subframe used by the random access preamble sequence is transmitted for itself, and k is a pre-configured subframe offset.

In an implementation, if the random access response is sent by using different random access response messages to respectively send random access responses of user equipments with different coverage enhancement levels, the processing module 122 determines random access for descrambling itself. The scrambling sequence of the random access response message corresponding to the preamble sequence includes:

The structure and processing manner of the network device and the user equipment provided by the embodiments of the present invention are described below in conjunction with the preferred hardware structure.

Referring to FIG. 13, the network device provided by the embodiment of the present invention includes:

The transceiver 131 is configured to receive a random access preamble sequence sent by the user equipment, and determine a random access response corresponding to the random access preamble sequence sent by each user equipment.

The processor 132 is configured to determine, according to the received random access preamble sequence sent by the user equipment and the sending manner of the random access response, parameter information required for sending the random access response corresponding to the random access preamble sequence; and, triggering The transceiver 131 sends a random access response to the user equipment according to the determined parameter information according to the sending manner of the random access response.

The sending mode includes: using a random access response message to send a random access response corresponding to the random access preamble sequence sent by the user equipment with different coverage enhancement levels, or sending each user separately by using different random access response messages. The random access response corresponding to the random access preamble sequence sent by the device; the parameter information includes: time-frequency resource information for carrying the random access response message, the number of repetitions of the random access response message, and the sending time of the random access response message And at least one of a scrambling code sequence for scrambling the transmitted random access response message.

In the implementation, if the random access response is sent by using a random access response message And sending, by the processor 132, a random access response corresponding to the random access preamble sequence sent by the user equipments with different coverage enhancement levels, and determining, by the processor 132, the sending moment of sending the random access response message, specifically:

Further, if the random access response is sent by using a random access response message to send a random access response corresponding to the random access preamble sequence sent by the user equipment with different coverage enhancement levels, the processor 132 determines to send the random access. The sending moment of the incoming response message specifically includes: determining, according to the received random access preamble sequence sent by the user equipment, and the sending manner of the random access response, that the sending moment of the random access response message is n + k , where , n is the number of the last configured subframe for carrying the random access preamble sequence, and k is a pre-configured subframe offset.

Further, if the random access response is sent by using a random access response message to send a random access response corresponding to the random access preamble sequence sent by the user equipment with different coverage enhancement levels, the processor 132 determines to send according to the following manner. The scrambling sequence of the random access response: determining the subframe index t_id used for scrambling the sequence of the random access response message to send the random access preamble to the user equipment of different coverage enhancement levels The number of the same subframe used at the time, or the number of the subframe used when the random access preamble sequence corresponding to the preset coverage enhancement level is transmitted;

Advantageously, processor 132 determines a scrambling sequence for scrambling the one random access response message The t _ id used in the calculation is:

Based on the foregoing embodiment, if at least two user equipments use different random access resources to send the same random access preamble sequence, the processor 132 is further configured to:

The second random access response message carries the second indication information, where the second indication information is used to indicate a random corresponding to the random access preamble sequence sent by the user equipment of different coverage enhancement levels in the sent random access response message. Access response.

In an implementation, if the random access response is sent by using different random access response messages to respectively send random access responses corresponding to the random access preamble sequence sent by the user equipment with different coverage enhancement levels, the processor 132 determines The number of repetitions required to send the random access response corresponding to the random access preamble sequence sent by each user equipment includes:

Determining, according to a random access preamble sequence sent by each user equipment, a coverage enhancement level of each user equipment; and determining, according to a correspondence between the coverage enhancement level and a random access response repetition number, determining random access sent by each user equipment The number of repetitions of the random access response message corresponding to the preamble sequence.

Further, if the random access response is sent by using different random access response messages to respectively send random access responses corresponding to the random access preamble sequence sent by the user equipments with different coverage enhancement levels, the processor 132 determines to send each The parameter information required for the random access response corresponding to the random access preamble sequence sent by the user equipment includes:

According to the received random access preamble sequence sent by the user equipment and the random access response And sending, by the random access preamble sequence sent by each user equipment, a different scrambling code sequence for scrambling the random access response message corresponding to the random access preamble sequence, and/or sending each user equipment The random access response message corresponding to the random access preamble sequence determines a different transmission time.

Specifically, the processor 132 determines a different sending moment for the random access preamble sequence corresponding to the random access preamble sequence sent by each user equipment, and specifically includes:

Specifically, the processor 132 determines a scrambling code sequence for scrambling the random access response message corresponding to the random access preamble sequence sent by each user equipment, and specifically includes:

In an implementation, the processor 132 determines the coverage enhancement level of the user equipment, and specifically includes: determining, according to the random access preamble sequence group to which the random access preamble sequence sent by the user equipment belongs, the coverage enhancement of the user equipment that sends the random access preamble sequence a level, where each random access preamble sequence group corresponds to a different coverage enhancement level, and each random access preamble sequence group includes at least one pre-configured random access preamble sequence and is included in different random access preamble sequence groups. The random access preamble sequence is different; or,

Determining, according to a frequency domain location of the random access resource that carries the random access preamble sequence sent by each user equipment, a coverage enhancement level of the user equipment that sends the random access preamble sequence, where the random access used in the random access procedure The incoming resource is divided into multiple resource groups in the frequency domain, and each resource group pair Should be a different coverage enhancement level; or,

Referring to FIG. 14, the user equipment provided by the embodiment of the present invention includes:

The transceiver 141 is configured to send a random access preamble sequence to the base station, and indicate its own coverage enhancement level by using a random access preamble sequence;

The processor 142 is configured to determine parameter information required to receive a random access response message corresponding to the random access preamble sequence of the random access response according to the sending manner of the random access response, and trigger the transceiver 141 to follow the determined parameter information according to the parameter information. Receiving a random access response repetition number corresponding to the coverage enhancement level, and receiving a random access response message sent by the base station;

The sending manner of the random access response includes: using a random access response message to send a random access response corresponding to the random access preamble sequence sent by the user equipment with different coverage enhancement levels, or using different random access response messages. Sending a random access response corresponding to the random access preamble sequence sent by each user equipment, respectively;

The parameter information required for sending the random access response message corresponding to the random access preamble sequence includes: time-frequency resource information for carrying the random access response message, the sending time of the random access response message, and the random access for scrambling At least one of the scrambling code sequences of the response message.

In implementation, the transceiver 141 is specifically configured to:

Determining a frequency domain location corresponding to its own coverage enhancement level, and transmitting a random access preamble sequence to the base station in the determined frequency domain location, where the random access resource used in the random access process is Dividing into multiple resource groups in the frequency domain, each resource group corresponding to a different coverage enhancement level; or determining a time domain location corresponding to its own coverage enhancement level, and transmitting a random access preamble to the base station in the determined time domain location The sequence, where the random access resource used in the random access process is divided into multiple resource groups in the time domain, and each resource group corresponds to a different coverage enhancement level.

In the implementation, if the random access response is sent by using a random access response message to send a random access response corresponding to the random access preamble sequence of the user equipment with different coverage enhancement levels, the processor 142 is specifically configured to:

In an implementation, if the random access response is sent by using a random access response message to send a random access response of the user equipment with different coverage enhancement levels, the processor 142 determines to use the descrambling the received one random The scrambling sequence of the access response message includes:

Determining, by using the t_id used for descrambling the received random access response message, the t_id used by the user equipment of the different coverage enhancement level to transmit the random access preamble sequence, or The number of the subframe used when the random access preamble sequence corresponding to the preset coverage enhancement level is transmitted; and,

Preferably, the processor 142 determines that the t_id used for the scrambling code sequence calculation for descrambling the received one random access response message is specifically:

The random access preamble sequence corresponding to the preset coverage enhancement level is used for transmission. The number of the starting sub-frame or the number of the ending sub-frame.

In implementation, processor 142 is also used to:

Determining, according to the received random access response message, the second indication information, the random access response corresponding to the random access preamble sequence sent by the random access response message, where the second indication information is used by the second indication information And a random access response corresponding to the random access preamble sequence sent by the user equipment with different coverage enhancement levels in the one random access response message received by the user equipment.

In the implementation, if the random access response is sent by using a random access response message to send a random access response of the user equipment of different coverage enhancement levels, the processor 142 is specifically configured to: according to the random access response The sending mode determines that the sending time of the random access response corresponding to the random access preamble sequence is A + k , where the starting subframe or the ending subframe used by the random access preamble sequence is sent by itself, and k is a pre- The configured subframe offset.

In an implementation, if the random access response is sent by using different random access response messages to respectively send random access responses of user equipments with different coverage enhancement levels, the processor 142 determines random access for scrambling itself. The scrambling sequence of the random access response message corresponding to the preamble sequence includes:

Determining the sc_code used for scrambling the random access response message corresponding to the random access preamble sequence of its own is the number of the subframe used when transmitting the random access preamble sequence; and/or, The f_id used to calculate the scrambling code sequence corresponding to the random access preamble sequence used for scrambling itself is the frequency domain information used when transmitting the random access preamble sequence by itself.

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

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

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

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

Although the preferred embodiment of the invention has been described, it will be apparent to those skilled in the < Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and the modifications and modifications The spirit and scope of the invention. Thus, it is intended that the present invention cover the modifications and variations of the inventions

Claims

Rights request

1. A method for transmitting random access messages, characterized in that the method includes: receiving a random access preamble sequence sent by a user equipment, and determining a random access preamble sequence corresponding to each random access preamble sequence sent by the user equipment. input response;

According to the received random access preamble sequence sent by the user equipment and the sending method of the random access response, determine the parameter information required to send the random access response corresponding to the random access preamble sequence; and,

According to the determined parameter information, send a random access response to the user equipment according to the sending method;

Wherein, the sending method includes using one random access response message to send random access responses corresponding to random access preamble sequences sent by user equipments with different coverage enhancement levels, or using different random access response messages to respectively send random access responses with different coverage enhancement levels. Random access responses corresponding to random access preamble sequences sent by user equipment with different coverage enhancement levels; the parameter information includes: time-frequency resource information used to carry the random access response message, the number of repetitions of the random access response message, At least one of the information on the sending time of the random access response message and the scrambling code sequence used to scramble the sent random access response message.

2. The method according to claim 1, characterized in that, if the random access response is sent in a manner that uses one random access response message to send the random access preamble sequence corresponding to the user equipment with different coverage enhancement levels. random access response, then determine the number of repetitions to send the one random access response message based on the received random access preamble sequence sent by the user equipment and the sending method of the random access response, specifically including:

Determine the coverage enhancement level of the user equipment according to the random access preamble sequence sent by the user equipment; and,

According to the corresponding relationship between the coverage enhancement level and the number of repetitions of the random access response, the number of repetitions corresponding to the largest coverage enhancement level among the determined coverage enhancement levels is obtained and used as the number of repetitions for sending the one random access response message.

3. The method according to claim 2, wherein if the random access response is sent in a random access response message, the random access preamble sequence corresponding to the random access preamble sequence sent by the user equipment with different coverage enhancement levels is sent. a random access response, then determine the sending time of sending the one random access response message according to the received random access preamble sequence sent by the user equipment and the sending method of the random access response, specifically including:

According to the received random access preamble sequence sent by the user equipment and the sending method of the random access response, it is determined that the sending time of the one random access response message is n + k, where n is the last preconfigured user. For the number of the subframe carrying the random access preamble sequence, k is the preconfigured subframe offset.

4. The method of claim 2 or 3, wherein if the random access response is sent in a random access response message, a random access preamble sent by user equipments with different coverage enhancement levels is sent. The random access response corresponding to the sequence determines the scrambling code sequence for sending the random access response based on the received random access preamble sequence sent by the user equipment and the sending method of the random access response, specifically including:

Determine that the subframe index t_id used in the calculation of the scrambling code sequence used to scramble the one random access response message is the number of the same subframe used when user equipment with different coverage enhancement levels sends random access preamble sequences, Or, the number of the subframe used when sending the random access preamble sequence corresponding to the preset coverage enhancement level; and,

Determine that the frequency domain index f_id used in the calculation of the scrambling code sequence used to scramble the one random access response message is the same frequency domain information used when user equipments with different coverage enhancement levels send random access preamble sequences, or , the frequency domain information used when transmitting the random access preamble sequence corresponding to the preset coverage enhancement level.

5. The method of claim 4, wherein the t_id used to determine the scrambling code sequence used to scramble the one random access response message is specifically:

User equipment with different coverage enhancement levels uses the same starting subframe number or the same ending subframe number when sending random access preamble sequences; or, The number of the start subframe or the number of the end subframe used when transmitting the random access preamble sequence corresponding to the preset coverage enhancement level.

6. The method according to any one of claims 2 to 5, characterized in that if at least two user equipments with different coverage enhancement levels use different random access resources to send the same random access preamble sequence, the method further includes:

The first indication information is carried in the random access response message, and the first indication information is used to indicate the random access preamble sent by the user equipment using different random access resources in the sent random access response message. The random access response corresponding to the sequence, or,

The one random access response message carries second indication information, and the second indication information is used to indicate the random access preamble sequence sent by the user equipment with different coverage enhancement levels in the sent one random access response message. The corresponding random access response.

7. The method of claim 1, wherein if the random access response is sent by using different random access response messages to respectively send random access preamble sequences sent by user equipments with different coverage enhancement levels The corresponding random access response is determined to send the random access preamble sequence corresponding to each random access preamble sequence sent by the user equipment according to the received random access preamble sequence sent by the user equipment and the sending method of the random access response. The number of repetitions required for the response, including:

Determine the coverage enhancement level of each user equipment according to the random access preamble sequence sent by each user equipment; and,

According to the corresponding relationship between the coverage enhancement level and the number of random access response repetitions, the number of repetitions of the random access response message corresponding to the random access preamble sequence sent by each user equipment is determined.

8. The method according to claim 7, characterized in that, based on the received random access preamble sequence sent by the user equipment and the sending method of the random access response, it is determined to send the random access sequence sent by each user equipment. The parameter information required for the random access response corresponding to the preamble sequence specifically includes: According to the received random access preamble sequence sent by the user equipment and the sending method of the random access response, Enter the preamble sequence to determine a different scrambling code sequence for scrambling the random access response message corresponding to the random access preamble sequence, and/or, is The random access response message corresponding to the random access preamble sequence sent by each user equipment determines a different sending time.

9. The method according to claim 8, characterized in that, according to the received random access preamble sequence sent by the user equipment and the sending method of the random access response, the random access preamble sent by each user equipment is The random access response message corresponding to the sequence determines a different sending time, specifically including:

Determine the sending time of the random access response message corresponding to the random access preamble sequence sent by each user equipment, where 1 is a different starting subframe used by each user equipment to send the random access preamble sequence or Different end subframes, k is the preconfigured subframe offset.

10. The method according to claim 8, characterized in that, based on the received random access preamble sequence sent by the user equipment and the sending method of the random access response, determining the method used to scramble each user equipment sent. The scrambling code sequence of the random access response message corresponding to the random access preamble sequence, specifically includes:

Determine the scrambling code sequence used to calculate the scrambling code sequence used to scramble the random access response message corresponding to the random access preamble sequence sent by each user equipment; -13 is the number used when each user equipment sends a random access preamble sequence The number of different subframes used; and/or,

Determine the scrambling code sequence used for scrambling the random access response message corresponding to the random access preamble sequence sent by each user equipment. The f_id used in calculation is the one used by each user equipment when sending the random access preamble sequence. different frequency domain information.

11. The method of claim 2 or 7, wherein determining the coverage enhancement level of the user equipment according to the random access preamble sequence sent by the user equipment specifically includes: based on the random access preamble sequence sent by the user equipment. The random access preamble sequence group to which the random access preamble sequence belongs determines the coverage enhancement level of the user equipment that sends the random access preamble sequence, where each random access preamble sequence group corresponds to a different coverage enhancement level, and each random access preamble sequence group corresponds to a different coverage enhancement level. Each random access preamble sequence group contains at least one preconfigured random access preamble sequence and the random access preamble sequences contained in different random access preamble sequence groups are different; or, Determine the coverage enhancement level of the user equipment that sends the random access preamble sequence according to the frequency domain location of the random access resource that carries the random access preamble sequence sent by each user equipment, wherein, The random access resources used are divided into multiple resource groups in the frequency domain, and each resource group corresponds to a different coverage enhancement level; or,

Determine the coverage enhancement level of the user equipment that sends the random access preamble sequence according to the time domain location of the random access resource that carries the random access preamble sequence sent by each of the user equipment, wherein, The random access resources used are divided into multiple resource groups in the time domain, and each resource group corresponds to a different coverage enhancement level.

12. A random access message transmission method, characterized in that the method includes: sending a random access preamble sequence to the base station, and indicating the own coverage enhancement level through the random access preamble sequence;

According to the sending method of the random access response, determine the parameter information required to receive the random access response message corresponding to the random access preamble sequence; and,

According to the determined parameter information, receive the random access response message sent by the base station according to the number of random access response repetitions corresponding to its own coverage enhancement level;

Wherein, the sending method includes using one random access response message to send random access responses corresponding to random access preamble sequences sent by user equipments with different coverage enhancement levels, or using different random access response messages to respectively send random access responses with different coverage enhancement levels. Random access responses corresponding to random access preamble sequences sent by user equipment with different coverage enhancement levels; the parameter information includes: time-frequency resource information used to carry the random access response, the reception time of the random access response message, and At least one kind of information in the scrambling code sequence used to descramble the random access response message.

13. The method of claim 12, wherein sending a random access preamble sequence to the base station specifically includes:

Determine a random access preamble sequence group corresponding to its own coverage enhancement level, select a random access preamble sequence from the determined random access preamble sequence group, and send the selected random access preamble sequence to the base station, Among them, each random access preamble sequence group corresponds to a different coverage enhancement level, and each random access preamble sequence group contains at least one preconfigured random access preamble. sequence and the random access preamble sequences contained in different random access preamble sequence groups are different; or,

Determine a frequency domain position corresponding to its own coverage enhancement level, and send a random access preamble sequence to the base station at the determined frequency domain position, where the random access resources used in the random access process are divided into frequency domain Multiple resource groups, each resource group corresponding to a different coverage enhancement level; or,

Determine the time domain position corresponding to its own coverage enhancement level, and send a random access preamble sequence to the base station at the determined time domain position, where the random access resources used in the random access process are divided into time domain Multiple resource groups, each resource group corresponds to a different coverage enhancement level.

14. The method according to claim 12 or 13, wherein if the random access response is sent in a random access response message, a random access preamble sent by user equipments with different coverage enhancement levels is sent. The random access response corresponding to the sequence is then:

According to the sending method of the random access response, it is determined that the reception time of receiving the one random access response message is n+k, where n is the number of the last preconfigured subframe used to carry the random access preamble sequence. , k is the preconfigured subframe offset.

15. The method according to any one of claims 12 to 14, characterized in that if the random access response is sent in a random access response message using a random access response message sent by user equipments with different coverage enhancement levels, Access the random access response corresponding to the preamble sequence, and determine the scrambling code sequence used to descramble the received random access response message according to the sending method of the random access response, specifically including:

The t_id used for determining the scrambling code sequence used to descramble the received random access response message is the number of the same subframe used when user equipments with different coverage enhancement levels send random access preamble sequences. , or, the number of the subframe used when sending the random access preamble sequence corresponding to the preset coverage enhancement level; and,

It is determined that the f_id used in the scrambling code sequence calculation for descrambling the received one random access response message is the one used when user equipments with different coverage enhancement levels send random access preamble sequences. The same frequency domain information used, or the frequency domain information used when transmitting the random access preamble sequence corresponding to the preset coverage enhancement level.

16. The method of claim 15, wherein the t_id used to calculate the scrambling code sequence for descrambling the received random access response message is specifically:

User equipment with different coverage enhancement levels uses the same starting subframe number or the same ending subframe number when sending random access preamble sequences; or,

The number of the starting subframe or the number of the ending subframe used when transmitting the random access preamble sequence corresponding to the preset coverage enhancement level.

17. The method according to any one of claims 13 to 16, characterized in that the method further includes:

According to the first indication information carried in the received random access response message, determine the random access response corresponding to the random access preamble sequence sent by itself in the one random access response message, wherein, the first An indication information is used to indicate the random access response corresponding to the random access preamble sequence sent by the user equipment using different random access resources in a random access response message received by the user equipment; or,

According to the second indication information carried in the received random access response message, determine the random access response corresponding to the random access preamble sequence sent by itself in the one random access response message, wherein, the first The second indication information is used to indicate the random access response corresponding to the random access preamble sequence sent by the user equipment with different coverage enhancement levels in a random access response message received by the user equipment.

18. The method according to claim 12 or 13, characterized in that if the random access response is sent by using different random access response messages to respectively send random access responses sent by user equipments with different coverage enhancement levels. Enter the random access response corresponding to the preamble sequence, then:

According to the sending method of the random access response, determine the reception time of the random access response corresponding to its own random access preamble sequence as A + k, where is the starting subframe or end used by itself to send the random access preamble sequence. subframe, k is the preconfigured subframe offset.

19. The method according to claim 12 or 13, characterized in that if the random access response is sent by using different random access response messages to respectively send random access responses sent by user equipments with different coverage enhancement levels. Enter the random access response corresponding to the preamble sequence, and then determine the scrambling code sequence of the random access response message corresponding to the random access preamble sequence used to descramble itself, which specifically includes: Determining the random access preamble sequence used to descramble itself The t_id used in the calculation of the scrambling code sequence of the corresponding random access response message is the number of the subframe used when itself sends the random access preamble sequence; and/or, determines the random access preamble sequence used to descramble itself. The f_id used in the calculation of the corresponding scrambling code sequence is the frequency domain information used by itself when sending the random access preamble sequence.

20. A network device, characterized in that the network device includes:

A receiving module, configured to receive the random access preamble sequence sent by the user equipment, and determine the random access response corresponding to the random access preamble sequence sent by each user equipment;

A processing module configured to determine, based on the received random access preamble sequence sent by the user equipment and the sending method of the random access response, the parameter information required to send the random access response corresponding to the random access preamble sequence; and,

A sending module, configured to send a random access response to the user equipment according to the sending method according to the parameter information determined by the processing module;

21. The network device according to claim 20, wherein if the random access response is sent in a manner such that one random access response message is used to send a random access preamble sent by user equipments with different coverage enhancement levels random access response corresponding to the sequence, then the processing module determines The sending time of sending the one random access response message specifically includes:

Determine the coverage enhancement level of the user equipment according to the random access preamble sequence sent by the user equipment; and obtain the largest coverage enhancement level among the determined coverage enhancement levels based on the correspondence between the coverage enhancement level and the number of random access response repetitions. The number of repetitions corresponding to the coverage enhancement level is used as the number of repetitions for sending the one random access response message.

22. The network device according to claim 21, wherein if the random access response is sent by using one random access response message to send a random access preamble sequence sent by user equipment with different coverage enhancement levels If the corresponding random access response is received, the processing module determines the sending time of sending the one random access response message, which specifically includes:

According to the received random access preamble sequence sent by the user equipment and the sending method of the random access response, it is determined that the sending time of the one random access response message is n+k, where n is the last preconfigured user. For the number of the subframe carrying the random access preamble sequence, k is the preconfigured subframe offset.

23. The network device according to claim 21 or 22, characterized in that, if the random access response is sent by using one random access response message to send random access messages sent by user equipments with different coverage enhancement levels The random access response corresponding to the preamble sequence, then the processing module determines the scrambling code sequence to send the one random access response according to the following method:

24. The network device according to claim 23, wherein the processing module determines the The t_id used in calculating the scrambling code sequence for scrambling the one random access response message is specifically: the number of the same starting subframe used by user equipment with different coverage enhancement levels when sending random access preamble sequences. or the same ending subframe number; or,

25. The network device according to any one of claims 21 to 24, wherein if at least two of the user equipments send the same random access preamble sequence using different random access resources, then the processing Modules are also used for:

26. The network device according to claim 20, wherein if the random access response is sent in a manner of using different random access response messages to respectively send random access messages sent by user equipments with different coverage enhancement levels, The random access response message corresponding to the preamble sequence, then the processing module determines the number of repetitions required to send the random access response corresponding to each random access preamble sequence sent by the user equipment, specifically including:

Determine the coverage enhancement level of each user equipment according to the random access preamble sequence sent by each user equipment; and determine the coverage enhancement level of each user equipment according to the corresponding relationship between the coverage enhancement level and the number of random access response repetitions. The number of repetitions of the random access response message corresponding to the random access preamble sequence sent by the device.

27. The network device according to claim 26, wherein if the sending method of the random access response is to use different random access response messages to respectively send random access messages sent by user equipments with different specific coverage enhancement levels. The random access response message corresponding to the preamble sequence, then the processing The module determines the parameter information required to send the random access response corresponding to the random access preamble sequence sent by each user equipment, specifically including:

According to the received random access preamble sequence sent by the user equipment and the sending method of the random access response, determine a different random access preamble sequence for scrambling the random access preamble for each random access preamble sequence sent by the user equipment. the scrambling code sequence of the random access response message corresponding to the sequence, and/or, determining a different sending time for the random access response message corresponding to the random access preamble sequence sent by each of the user equipments.

28. The network device according to claim 27, wherein the processing module determines a different sending time for the random access response message corresponding to the random access preamble sequence sent by each user equipment, specifically including: :

Determine the sending time of the random access response message corresponding to the random access preamble sequence sent by each user equipment, wherein different starting subframes or different endings are used for each user equipment to send the random access preamble sequence. subframe, k is the preconfigured subframe offset.

29. The network device according to claim 27, wherein the processing module determines a scrambling code sequence used to scramble the random access response message corresponding to the random access preamble sequence sent by each user equipment, Specifically include:

Determine the scrambling code sequence used for scrambling the random access response message corresponding to the random access preamble sequence sent by each user equipment. The t_id used in the calculation is the t_id used when each user equipment sends the random access preamble sequence. The number of different subframes used; and/or,

Determine the scrambling code sequence used for scrambling the random access response message corresponding to the random access preamble sequence sent by each user equipment. The f_id used in the calculation is the f_id used when each user equipment sends the random access preamble sequence. Different frequency domain information used.

30. The network device according to claim 21 or 26, wherein the processing module determines the coverage enhancement level of the user equipment, specifically including:

Determine the coverage enhancement level of the user equipment that sends the random access preamble sequence according to the random access preamble sequence group to which the random access preamble sequence sent by the user equipment belongs, wherein, each Each random access preamble sequence group corresponds to a different coverage enhancement level. Each random access preamble sequence group contains at least one preconfigured random access preamble sequence and the random access preamble sequences included in different random access preamble sequence groups different; or,

Determine the coverage enhancement level of the user equipment that sends the random access preamble sequence according to the frequency domain location of the random access resource that carries the random access preamble sequence sent by each user equipment, wherein, The random access resources used are divided into multiple resource groups in the frequency domain, and each resource group corresponds to a different coverage enhancement level; or,

31. A user equipment, characterized in that the user equipment includes:

A sending module, configured to send a random access preamble sequence to the base station, and indicate its own coverage enhancement level through the random access preamble sequence;

A processing module configured to determine the parameter information required to receive the random access response message corresponding to the random access preamble sequence according to the sending method of the random access response; and,

A receiving module, configured to receive a random access response message sent by the base station according to the number of random access response repetitions corresponding to its own coverage enhancement level based on the parameter information determined by the processing module;

Wherein, the sending method includes using one random access response message to send random access responses corresponding to random access preamble sequences sent by user equipments with different coverage enhancement levels, or using different random access response messages to respectively send random access responses with different coverage enhancement levels. Random access responses corresponding to random access preamble sequences sent by user equipment with different coverage enhancement levels; the parameter information includes: time-frequency resource information used to carry the random access response message, the reception time of the random access response message, and at least one information in the scrambling sequence used to descramble the random access response message.

32. The user equipment according to claim 31, characterized in that the sending module is specifically used for: Determine a random access preamble sequence group corresponding to its own coverage enhancement level, select a random access preamble sequence from the determined random access preamble sequence group, and send the selected random access preamble sequence to the base station, Among them, each random access preamble sequence group corresponds to a different coverage enhancement level, each random access preamble sequence group contains at least one preconfigured random access preamble sequence, and the random access preamble sequence included in different random access preamble sequence groups The input leader sequence is different;

or,

33. The user equipment according to claim 31 or 32, characterized in that if the random access response is sent by using one random access response message to send a random access response sent by user equipment with different coverage enhancement levels The random access response corresponding to the preamble sequence, then the processing module is specifically used to:

According to the sending method of the random access response, it is determined that the reception time of receiving the one random access response message is n + k, where n is the number of the last preconfigured subframe used to carry the random access preamble sequence. , k is the preconfigured subframe offset.

34. The user equipment according to any one of claims 31 to 33, characterized in that if the random access response is sent by using one random access response message to be sent by user equipment with different coverage enhancement levels The random access response corresponding to the random access preamble sequence, the processing module determines the scrambling code sequence used to descramble the received random access response message, specifically includes: determining the scrambling code sequence used to descramble the received random access response message. The t_id used in calculating the scrambling code sequence of a random access response message is the t_id used when user equipments with different coverage enhancement levels send random access preamble sequences. The number of the same subframe used, or the number of the subframe used when sending the random access preamble sequence corresponding to the preset coverage enhancement level; and,

Determine that the f_id used in the scrambling code sequence calculation for descrambling the one received random access response message is the same frequency domain information used when user equipment with different coverage enhancement levels sends random access preamble sequences, Or, the frequency domain information used when transmitting the random access preamble sequence corresponding to the preset coverage enhancement level.

35. The user equipment according to claim 34, characterized in that the processing module determines the t_id used in the scrambling code sequence calculation for descrambling the received one random access response message to be specifically:

36. The user equipment according to any one of claims 32 to 35, characterized in that the processing module is also used to:

37. The user equipment according to claim 31 or 32, characterized in that if the random access The sending method of the incoming response is to use different random access response messages to respectively send random access responses corresponding to the random access preamble sequences sent by user equipments with different coverage enhancement levels, then the processing module is specifically used to:

38. The user equipment according to claim 31 or 32, characterized in that if the random access response is sent in a manner of using different random access response messages to respectively send random access messages sent by user equipment with different coverage enhancement levels. The random access response corresponding to the access preamble sequence, then the processing module determines the scrambling code sequence used to descramble the random access response message corresponding to its own random access preamble sequence, specifically including:

Determine that the t_id used in the calculation of the scrambling code sequence of the random access response message corresponding to the random access preamble sequence used to descramble itself is the number of the subframe used when itself sends the random access preamble sequence; and/or, The f_id used to determine the scrambling code sequence corresponding to the random access preamble sequence used to descramble itself is the frequency domain information used by itself when sending the random access preamble sequence.

39. A network device, characterized in that the network device includes:

A transceiver, used to receive the random access preamble sequence sent by the user equipment;

A processor, configured to determine the random access response corresponding to the random access preamble sequence sent by each user equipment, and determine the sending method according to the received random access preamble sequence sent by the user equipment and the sending method of the random access response. Parameter information required for the random access response corresponding to the random access preamble sequence; and triggering the transceiver to send a random access response to the user equipment according to the determined parameter information and the sending method;

Wherein, the sending method includes using one random access response message to send random access responses corresponding to random access preamble sequences sent by user equipments with different coverage enhancement levels, or using different random access response messages to respectively send random access responses with different coverage enhancement levels. Random access responses corresponding to random access preamble sequences sent by user equipment with different coverage enhancement levels; the parameter information includes: used to carry At least one of the time-frequency resource information of the random access response message, the number of repetitions of the random access response message, the sending time of the random access response message, and the scrambling code sequence used to scramble the sent random access response message. information.

40. The network device according to claim 39, characterized in that, if the random access response is sent by using one random access response message to send a random access preamble sequence sent by user equipment with different coverage enhancement levels If the corresponding random access response is received, the processor determines the sending time to send the one random access response message, which specifically includes:

41. The network device according to claim 40, wherein if the random access response is sent by using one random access response message to send a random access preamble sequence sent by user equipment with different coverage enhancement levels If the corresponding random access response is received, the processor determines the sending time to send the one random access response message, which specifically includes:

42. The network device according to claim 40 or 41, characterized in that, if the random access response is sent by using one random access response message to send random access messages sent by user equipments with different coverage enhancement levels The random access response corresponding to the preamble sequence, then the processor determines the scrambling code sequence to send the one random access response in the following manner:

The subframe index t_id used to determine the scrambling code sequence used to scramble the one random access response message is the number of the same subframe used when user equipment with different coverage enhancement levels sends random access preamble sequences. , or, before random access corresponding to the preset coverage enhancement level The number of the subframe used when transmitting the pilot sequence; and,

Determine that the frequency domain index f_id used in the calculation of the scrambling code sequence used to scramble the one random access response message is the same frequency domain information used when user equipment with different coverage enhancement levels sends random access preamble sequences, Or, the frequency domain information used when transmitting the random access preamble sequence corresponding to the preset coverage enhancement level.

43. The network device according to claim 42, wherein the processor determines that the t_id used for scrambling the scrambling code sequence calculation of the one random access response message is specifically:

44. The network device according to any one of claims 40 to 43, wherein if at least two of the user equipments send the same random access preamble sequence using different random access resources, then the processing The device is also used for:

45. The network device according to claim 39, wherein if the random access response is sent in a manner of using different random access response messages to respectively send random access messages sent by user equipments with different coverage enhancement levels, The random access response corresponding to the preamble sequence, the processor determines the number of repetitions required to send the random access response corresponding to each random access preamble sequence sent by the user equipment, specifically including:

According to the random access preamble sequence sent by each user equipment, determine the The coverage enhancement level of the equipment; and, based on the correspondence between the coverage enhancement level and the number of random access response repetitions, determine the number of repetitions of the random access response message corresponding to the random access preamble sequence sent by each user equipment.

46. The network device according to claim 45, wherein the processor determines parameter information required to send a random access response corresponding to each random access preamble sequence sent by the user equipment, specifically including:

47. The network device according to claim 46, wherein the processor determines a different sending time for the random access response message corresponding to the random access preamble sequence sent by each user equipment, specifically including: :

48. The network device according to claim 46, wherein the processor determines a scrambling code sequence for scrambling the random access response message corresponding to the random access preamble sequence sent by each user equipment, Specifically include:

49. The network device according to claim 40 or 45, wherein the processor determines the coverage enhancement level of the user equipment, specifically including:

Determine the coverage enhancement level of the user equipment that sends the random access preamble sequence according to the random access preamble sequence group to which the random access preamble sequence sent by the user equipment belongs, where each random access preamble sequence group corresponds to Different coverage enhancement levels, each random access preamble sequence group contains at least one preconfigured random access preamble sequence and the random access preamble sequences contained in different random access preamble sequence groups are different; or,

50. A user equipment, characterized in that the user equipment includes:

A transceiver, configured to send a random access preamble sequence to the base station, and indicate its own coverage enhancement level through the random access preamble sequence;

a processor, configured to determine the parameter information required to receive the random access response message corresponding to the random access preamble sequence according to the sending mode of the random access response; and trigger the transceiver according to the parameter information determined by the processor, Receive the random access response message sent by the base station according to the number of random access response repetitions corresponding to its own coverage enhancement level;

Wherein, the sending method includes using one random access response message to send random access responses corresponding to random access preamble sequences sent by user equipments with different coverage enhancement levels, or using different random access response messages to respectively send random access responses with different coverage enhancement levels. Random access responses corresponding to random access preamble sequences sent by user equipment with different coverage enhancement levels; the parameter information includes: time-frequency resource information used to carry the random access response message, the reception time of the random access response message, and use At least one kind of information in the scrambling sequence of the random access response message.

51. The user equipment according to claim 50, characterized in that the processor is specifically configured to: determine a random access preamble sequence group corresponding to its own coverage enhancement level, and select from the determined random access preamble sequence Select a random access preamble sequence from the group and send the selected random access preamble sequence to the base station, where each random access preamble sequence group corresponds to a different coverage enhancement level, and each random access preamble sequence group Contains at least one preconfigured random access preamble sequence and the random access preamble sequences contained in different random access preamble sequence groups are different;

or,

52. The user equipment according to claim 50 or 51, characterized in that, if the sending method of the random access response is to use one random access response message to send the random access sent by the user equipment with different coverage enhancement levels. The random access response corresponding to the preamble sequence, then the processor is specifically used to:

According to the sending method of the random access response, it is determined that the reception time of the received random access response message is n + k, where n is the number of the last preconfigured subframe used to carry the random access preamble sequence. , k is the preconfigured subframe offset.

53. The user equipment according to any one of claims 50 to 52, wherein the random access response is sent by using one random access response message to be sent by user equipment with different coverage enhancement levels. If the random access preamble sequence corresponds to the random access response, the processor determines the scrambling code sequence used to receive the one random access response message, which specifically includes: The t_id used to determine the scrambling code sequence used for descrambling the received random access response message is the number of the same subframe used when user equipments with different coverage enhancement levels send random access preamble sequences. , or, the number of the subframe used when sending the random access preamble sequence corresponding to the preset coverage enhancement level; and,

54. The user equipment according to claim 53, characterized in that the processor determines the t_id used for descrambling the received scrambling code sequence calculation of the one random access response message to be specifically: with different The same starting subframe number or the same ending subframe number used by the user equipment covering the enhanced level when sending the random access preamble sequence; or,

55. The user equipment according to any one of claims 51 to 54, characterized in that the processor is also used to:

56. The user equipment according to claim 50 or 51, characterized in that if the random access response is sent in a manner of using different random access response messages to respectively send random access messages sent by user equipment with different coverage enhancement levels. Access the random access response corresponding to the preamble sequence, then the processor is specifically used to:

57. The user equipment according to claim 50 or 51, characterized in that if the random access response is sent in a manner of using different random access response messages to respectively send random access messages sent by user equipment with different coverage enhancement levels. access the random access response corresponding to the preamble sequence, then the processor determines the scrambling code sequence used to descramble the random access response message corresponding to its own random access preamble sequence, specifically including: