CN101478779A - Response method for cellular radio communication system random access - Google Patents
Response method for cellular radio communication system random access Download PDFInfo
- Publication number
- CN101478779A CN101478779A CNA2008100004079A CN200810000407A CN101478779A CN 101478779 A CN101478779 A CN 101478779A CN A2008100004079 A CNA2008100004079 A CN A2008100004079A CN 200810000407 A CN200810000407 A CN 200810000407A CN 101478779 A CN101478779 A CN 101478779A
- Authority
- CN
- China
- Prior art keywords
- random access
- time slot
- access time
- terminal
- message
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 41
- 238000004891 communication Methods 0.000 title claims abstract description 18
- 230000001413 cellular effect Effects 0.000 title claims description 18
- 230000000977 initiatory effect Effects 0.000 claims description 5
- 230000001351 cycling effect Effects 0.000 abstract 1
- 208000037918 transfusion-transmitted disease Diseases 0.000 description 11
- 238000010586 diagram Methods 0.000 description 6
- 101000633815 Homo sapiens TELO2-interacting protein 1 homolog Proteins 0.000 description 1
- 101000633807 Homo sapiens TELO2-interacting protein 2 Proteins 0.000 description 1
- 102100029253 TELO2-interacting protein 1 homolog Human genes 0.000 description 1
- 102100029259 TELO2-interacting protein 2 Human genes 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000007429 general method Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Images
Landscapes
- Mobile Radio Communication Systems (AREA)
Abstract
The invention provides a random access responding method in honeycomb communication system and comprises the following procedures: the system defines a time reception window responding to random access and the size of the time reception window is included; before starting random access, the terminal fixes the group mark corresponding to random access time slot according to the size of time reception window and the position information of the random access in the main system information cycling period; the terminal receives the random access fronting message and waits for the random access responding message containing the group mark in the time reception window. The technique scheme of the invention makes clear of the size range of the time reception window in the random access process and the definition method of the group mark. The method allows that the terminal can receives the only group mark set in the time reception window without demanding to read the whole MIB, thus reducing the time delay of random access to a large extent, in particular to reduce the time delay in switching.
Description
Technical Field
The invention relates to a random access method for a terminal to access a cellular wireless communication system, which mainly refers to a method and a process for responding to a random access preamble message after a base station receives the random access preamble message sent by the terminal.
Background
As shown in fig. 1, a cellular wireless communication system is mainly composed of terminals, base stations, and a core network. A Network formed by the base stations is called a Radio Access Network (RAN), and is responsible for Access layer transactions, such as management of Radio resources. There may be a physical or logical connection between the base stations, such as base station 1 and base station 2 or base station 3 in fig. 1, depending on the actual situation. Each base station may be connected to one or more Core Network nodes (CN). The core network is responsible for non-access stratum transactions such as location updates, etc., and is the anchor point for the user plane. The terminal refers to various devices that can communicate with a cellular wireless communication network, such as a mobile phone or a notebook computer.
Cellular radio communication systems are identified in system time by a basic unit of radio frames, the number of which is called SFN (radio frame number). The terminal can obtain the boundary of the radio frame in a cell search mode, so as to obtain time synchronization on the downlink. In a cellular wireless communication system such as UMTS and LTE, a radio frame is 10ms (milliseconds) in length. The frame structure within a radio frame may vary from one cellular radio system to another, and typically a radio frame comprises an integer number of subframes. TYPE1 (TYPE 1) includes 10 subframes within one radio frame in the LTE system, and each subframe includes 2 slots. Some cellular radio systems call the unit of a smaller level in a radio frame as a timeslot, for example, the FDD system of WCDMA has 15 timeslots in a radio frame. A random access slot in this context refers to a smaller sub-frame within a radio frame in a cellular radio communication system. For LTE systems, a random access slot typically refers to a subframe of length 1 ms. There are exceptions, however, in order to achieve wide coverage, the random access time slot in the LTE system may occupy 2 or 3 subframes or time slots, and these random access preambles are sometimes referred to as spreading bursts; a short random access preamble, which is shorter than a general time slot, may be used in a very small cell in LTE TDD.
In the existing LTE (long term evolution system), the first three steps of the random access procedure are:
a. a terminal sends a random access preamble message on a certain random access time slot;
b. after receiving the random access preamble message, the base station responds to the random access response message in a specified receiving window, and the message is distinguished by adopting a group identifier agreed in advance;
c. the terminal decides whether to receive the random access response message by recognizing the group identity of the random access response message
In step a, there may be 1 or more than 1 terminal transmitting a random access preamble message on the same random access slot. Whether these random access preamble messages collide depends on whether they employ the same random access preamble. The base station can identify messages using different random access preambles on the same random access slot, but cannot identify the same random access preamble message.
In step b, the random access response message may include response information for 1 or more than 1 random access preamble message. The random access preamble messages are transmitted from the same random access slot. The reason for combining possibly more than 1 random access response message into one response message is mainly to improve the utilization of the radio resources in the random access procedure. In order to make the terminal recognize the random access response message, the base station will include the group identifier agreed by both parties in advance on the message, and there is a one-to-one correspondence between the group identifier and the random access slot. Meanwhile, the random access response message further includes an individual identifier corresponding to the random access preamble message itself, which generally refers to an index number of the random access preamble in a random access preamble set in the cell.
In step c, after the terminal receives 1 random access response message within a specified time window, it first verifies whether the response message contains a desired group id, which is usually included on a physical control channel; if the expected group identification is included, verifying whether the response message includes an individual identification corresponding to the transmitted random access preamble message; if the desired individual identification is included, it may be determined whether the current random access response message corresponds to the transmitted random access preamble message.
In order to keep certain flexibility of the random access response process, the random access response message is not synchronous with the random access preamble message in the time domain, namely the random access response message and the random access preamble message are not in a fixed relation in the time domain; instead, the random access response message is allowed to be sent within a time window. The group identification predetermined by both parties is logically unique within the receive window because if the receive windows of two random access response messages do not overlap, confusion does not arise regardless of how the group identifications of the two messages are set.
The reception time window is a time interval for the terminal to wait for the random access response after transmitting the random access preamble message, is a range value of one TTI, and can be represented by a starting TTI and a window length. The starting TTI refers to the distance between the TTI at which the reception time window starts and the corresponding TTI of the random access slot. Since the receive time window of each random access preamble message has the same starting TTI, a key parameter affecting the reception of random access response messages is the size of the receive time window, expressed in number of TTIs.
Referring to fig. 2, random access slot 4 corresponds to a starting TTI1 and a reception time window 1; random access slot 1 corresponds to the starting TTI2 and the reception time window 2. The assumption that the two time windows do not overlap is that the distance between the random access slot 4 and the random access slot 1 is larger than the size of the defined reception time window. However, in the current LTE system, the minimum interval between the random access timeslots is 0 TTIs, that is, the minimum interval is distributed over consecutive TTIs, so the communication protocol needs to specify a unique group id within the reception time window.
In the prior art, in step b, a method how to set the group id is proposed. These methods typically require that the absolute position of the random access slot at system time be calculated, and then a group identifier be calculated based on the absolute position, such that the group identifier is unique within a specified time window. The main reason for this is because the LTE system currently has no specific specification for the size of the receive time window. In order to obtain the absolute position of the random access slot in the system time, the terminal first needs to acquire the SFN (system frame number) of the cell where the random access slot is located.
The information of the SFN is carried on the main system information block MIB of LTE. The contents of the MIB are cycled at a period of 40 milliseconds. However, in order to increase the coverage of the MIB, the base station may actually transmit the MIB once per 10ms radio frame, i.e. one LTE radio frame. A terminal far from the base station sometimes needs to combine the MIB received many times to receive a correct and complete MIB. Thus, the base station always transmits the MIB 4 times in a total of 40 ms. Each time the MIB is the same in content but different in scrambling process at the physical layer. The terminal can identify by its scrambling code that the 4 transmissions are currently received, in other words the terminal knows the last two bits of the system frame SFN by processing the received MIB at the physical layer. The last 2 bits of the SFN are read much faster than in the method of receiving the complete MIB.
At present, the handover process between cells of the LTE system is actually a random access process, and the above random access and response processes also need to be followed. If the group id is defined by the current general method, the terminal is required to obtain the SFN of the target cell by reading the complete MIB of the target cell in the application scenario where the handover is highly required for the delay. The distribution rule of the MIB in time is fixed. However, if the terminal reads the MIB without knowing the SFN of the target cell, more delay is introduced.
Disclosure of Invention
The technical problem to be solved by the present invention is to provide a response method for random access in a cellular wireless communication system, so as to reduce the time delay of the terminal initiating random access.
In order to solve the above problem, the present invention provides a response method for random access in a cellular wireless communication system, comprising:
the system defines a receiving time window of the random access response, including the size of the receiving time window;
before initiating random access, the terminal determines a group identifier corresponding to the random access time slot according to the size of the receiving time window and the position information of the random access time slot in the main system message cycle period;
the terminal initiates a random access preamble message and waits for a random access response message containing the group identifier within a receiving time window.
Further, when determining the group identifier of the current random access time slot, the terminal numbers the subframes in the cycle period of the main system message block in sequence, and takes the modulus of the number of the subframe in which the random access time slot is located and the size of the receiving time window as the group identifier of the random access time slot.
Further, the terminal determines the group identifier of the current random access slot according to the following formula:
(SFN_LSB*10+m)mod W，
wherein mod represents a modulo operation; SFN _ LSB is the relative number of the wireless frame where the current random access time slot is located; m is the subframe number of the current random access time slot in a wireless frame; w is the size of the receive time window.
Further, the SFN _ LSB is obtained by obtaining the last 2 bits of the radio frame, and the range is 0 to 3.
Further, when determining the group identifier of the current random access time slot, the terminal sequentially cycles numbers from 0 to M-1 for each random access time slot in the cycle period of the main system message block from the first random access time slot, and uses the number as the group identifier of the current random access time slot, where M is greater than or equal to the maximum value of the number of random access time slots that can be included in the receiving time window.
Further, when determining the group identifier of the current random access time slot, the terminal first determines a relative sequence number SN _ RLT of the current random access time slot in a main system message cycle period, where the relative sequence number refers to a corresponding sequence number when all random access time slots in the main system message cycle period are numbered sequentially from 0 to L-1, and L represents the total number of random access time slots in the main system information block cycle period;
and then, obtaining a corresponding group identifier according to the relative sequence number SN _ RLT of the current random access time slot, wherein the group identifier is equal to SN _ RLT mod M, mod is a modular operation, when the maximum value of the number of the random access time slots contained in the receiving time window can be divided by L, M is equal to the maximum value, otherwise, M is an integer which is larger than the maximum value and can be divided by L.
Further, the system defines a receive time window for the random access response to be sized to divide the cycle period of the primary system message block by an integer.
Further, if the random access response message sent by the base station contains the corresponding group identifier and the individual identifier corresponding to the random access preamble message, the terminal determines that the correct random access response message is received.
Further, the cellular wireless communication system is an LTE system.
In summary, the present invention provides a response method for random access in a cellular wireless communication system, which defines the size range of the receiving time window and the group identifier in the random access process. This method enables the terminal to set a unique group identity within the receive time window without reading the complete MIB. The time delay of random access, especially the time delay of switching is greatly reduced.
Drawings
FIG. 1 is a schematic diagram of a cellular wireless communication system architecture;
fig. 2 is a diagram of random access slots versus receive time windows;
FIG. 3 is a schematic diagram of the method of the present invention employing absolute sequence numbers for group identification numbering;
FIG. 4 is a schematic diagram of the method of the present invention employing relative sequence numbers for group identification numbering;
fig. 5 is a schematic diagram of a radio frame structure of LTE type 1;
fig. 6 is a schematic diagram of group id numbering performed by an application example of the present invention.
Detailed Description
The invention provides a response method of random access in a cellular wireless communication system, before the random access of a terminal, the system defines the size of a receiving time window, and determines a corresponding group mark according to the position of a random access time slot in a cycle period of a main system message MIB.
The present invention is explained by using two embodiments, both of which take LTE system as an example, and the period of the main system message block is 40 ms.
In the first embodiment, the group id is numbered by the absolute number:
step 11: the system defines the size W of a receiving time window of the random access response, and requires that the W can divide the cycle period of the main system message block completely;
step 12: before the terminal sends the message for initiating the random access preamble, according to the W and the position of the random access time slot in the main system message block cycle period (determined by the position in the wireless frame and the SFN _ LSB of the wireless frame where the random access time slot is located), the group identification corresponding to the current random access time slot is determined;
and sequentially numbering the subframes in the main system message block cycle period, and taking the modulus of the number of the subframe in which the random access time slot is positioned and the size W of a receiving time window as the group identification of the random access time slot. The specific method can be as follows:
the group identifier corresponding to the random access timeslot is determined by a preset formula, which may be, but is not limited to:
(SFN _ LSB × 10+ m) mod W, mod represents the modulo operation; wherein,
the SFN _ LSB is a relative frame number of a wireless frame where the random access time slot is located, the terminal obtains the SFN _ LSB by obtaining the last 2 bits of the wireless frame, and the value range is 0-3;
m is the subframe number of the random access time slot in the wireless frame, and the value range is 0-9;
w is the size of the receive time window.
As shown in fig. 3, assuming that the random access timeslots are on subframes 3, 6, and 9 of each radio frame, and the size of the receiving window is 5, it can be found that the numbers of the group identifiers corresponding to all the random access timeslots in the cycle period of the message block of the main system are sequentially: 3,1,4,3,1,4,3,1,4,3,1,4.
Step 13: the terminal initiates a random access preamble message, and waits for a random access response message containing the group identifier in a receiving time window so as to further confirm whether the random access preamble message is successfully sent, if the group identifier and an individual identifier corresponding to the random access preamble message, such as a random access preamble sequence number, can both correspond, the terminal considers that the correct random access response message is received, i.e. the random access preamble message is successfully sent.
In the second embodiment, the group identifier is numbered by the relative sequence number:
step 21: the system defines the size of a receiving time window W of the random access response, and requires that the W can divide the cycle period of the main system message block completely;
step 22: determining the maximum value M of the number of random access time slots which can be contained in one receiving time window according to the size of the receiving time window and the position of the random access time slot in a wireless frame;
as shown in fig. 4, assuming that the receiving time window is 8 and the random access slots are in 3, 6, and 9 subframes of each radio frame, the maximum number of random access slots that can be simultaneously included in the receiving time window is 3.
Step 23: before the terminal sends the message for initiating random access preamble, according to M and the position of the random access time slot in the main system message block cycle, determining the relative number of the group mark corresponding to the current random access time slot:
and for each random access time slot in the main system message block cycle period, sequentially and circularly numbering from 0 to M-1 from the first random access time slot, and taking the number as the group identification of the random access time slot. This M sometimes needs to be corrected.
Specifically, before determining the number of the group identifier, a relative sequence number SN _ RLT of the current random access slot in the main system message cycle period may be determined, where the relative sequence number is a sequence number corresponding to when all the random access slots in the main system message cycle period are numbered sequentially from 0 to L-1, and L represents the total number of the random access slots in the main system information block cycle period.
Then, the corresponding group identifier is obtained according to the relative sequence number SN _ RLT of the current random access time slot, which can be calculated by the following formula:
SN _ RLT mod M, mod is a modulo operation;
m should be able to divide L evenly; if not, then adjust M up to an integer that can divide L.
Step 24: the terminal initiates a random access preamble message, and waits for a random access response message containing the group identifier in a receiving time window so as to further confirm whether the random access preamble message is successfully sent, if the group identifier and an individual identifier corresponding to the random access preamble message, such as a random access preamble sequence number, can both correspond, the terminal considers that the correct random access response message is received, i.e. the random access preamble message is successfully sent.
The process according to the invention is further illustrated by the following application examples:
the method of the present invention is described by taking an LTE system as an example. Radio frame structure of LTE type1 as shown in fig. 5, the frame structure of type1 is suitable for FDD. The random access slot referred to in the embodiments refers to 1 subframe in the frame structure. The loop period of the primary system information block in LTE is 40 milliseconds.
As shown in fig. 6, it is assumed that the number space of the random access slot is 40 and the size of the reception time window is 8 msec. The random access slots are distributed over 2, 5, 8 subframes of each radio frame. Then, the formula (SFN _ LSB x 10+ m) mod W, m is 2, 5, 8, respectively;
when the absolute sequence number is adopted to represent the number of the group identifier, the number of each group identifier is obtained by adopting the formula: 2, 5, 0, 4, 7, 2, 6, 1, 4, 0, 3, 6;
when the number of the group id is represented by a relative sequence number, a maximum of 3 random access slots are included in one receiving window, and thus the number of each group id is 0, 1, 2, 0, 1, 2, 0, 1, 2, 0, 1, 2.
Step 31: terminal a and terminal B initiate random access preamble messages in the 13 th TTI of 40 ms, with the sequence numbers of the random access preambles being 13 and 17, respectively. When the absolute serial number is adopted for group identification numbering, the RA-RNTI is 4; when the group identification number is made using the relative number, the RA-RNTI is 0.
Step 32: the base station responds to the random access response message, wherein the RA-RNTI contained in the message is 4 (when the absolute serial number is numbered) or 0 (when the relative serial number is numbered) and the serial numbers 13 and 17 of the random access preamble;
step 33: both terminal a and terminal B receive the random access response message in the 15 th TTI, and the RA-RNTI in the discovery message is 4 (in absolute sequence number) or 0 (in relative sequence number), and then start decoding this response message.
Step 34: after decoding the message, terminal a finds the sequence number 13 of the random access preamble and thus considers that the correct random access response message has been received.
After decoding the message, terminal B finds the sequence number 17 of the random access preamble and considers that the correct random access response message has been received.
Claims (9)
1. A method for responding to random access in a cellular wireless communication system, comprising:
the system defines a receiving time window of the random access response, including the size of the receiving time window;
before initiating random access, the terminal determines a group identifier corresponding to the random access time slot according to the size of the receiving time window and the position information of the random access time slot in the main system message cycle period;
the terminal initiates a random access preamble message and waits for a random access response message containing the group identifier within a receiving time window.
2. The method of claim 1, wherein:
when determining the group identification of the current random access time slot, the terminal numbers the sub-frames in the cycle period of the main system message block in sequence, and the modulus of the number of the sub-frame where the random access time slot is located and the size of the receiving time window is used as the group identification of the random access time slot.
3. The method of claim 2, wherein:
the terminal determines the group identifier of the current random access time slot according to the following formula:
(SFN_LSB*10+m)mod W，
wherein mod represents a modulo operation; SFN _ LSB is the relative number of the wireless frame where the current random access time slot is located; m is the subframe number of the current random access time slot in a wireless frame; w is the size of the receive time window.
4. The method of claim 3, wherein:
the SFN _ LSB is obtained by obtaining the last 2 bits of the wireless frame, and the range of the SFN _ LSB is 0-3.
5. The method of claim 1, wherein:
when the terminal determines the group identification of the current random access time slot, the terminal sequentially and circularly numbers each random access time slot in the cycle period of the main system message block from 0 to M-1 from the first random access time slot, and the number is used as the group identification of the current random access time slot, wherein M is more than or equal to the maximum value of the number of the random access time slots which can be contained in the receiving time window.
6. The method of claim 5, wherein:
when determining the group identification of the current random access time slot, the terminal firstly determines the relative sequence number SN _ RLT of the current random access time slot in the main system message cycle period, wherein the relative sequence number refers to the corresponding sequence number when all the random access time slots in the main system message cycle period are numbered from 0 to L-1 in sequence, and L represents the total number of the random access time slots in the main system information block cycle period;
and then, obtaining a corresponding group identifier according to the relative sequence number SN _ RLT of the current random access time slot, wherein the group identifier is equal to SN _ RLT mod M, mod is a modular operation, when the maximum value of the number of the random access time slots contained in the receiving time window can be divided by L, M is equal to the maximum value, otherwise, M is an integer which is larger than the maximum value and can be divided by L.
7. The method of any one of claims 1 to 6, wherein:
the system defines a receive time window for the random access response that is sized to divide the cycle period of the primary system message block by an integer.
8. The method of any one of claims 1 to 6, wherein:
if the random access response message sent by the base station contains the corresponding group identification and the individual identification corresponding to the random access preamble message, the terminal considers that the correct random access response message is received.
9. The method of any of claims 1-6, wherein: the cellular wireless communication system is an LTE system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100004079A CN101478779B (en) | 2008-01-04 | 2008-01-04 | Response method for random access of cellular wireless communication system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100004079A CN101478779B (en) | 2008-01-04 | 2008-01-04 | Response method for random access of cellular wireless communication system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101478779A true CN101478779A (en) | 2009-07-08 |
| CN101478779B CN101478779B (en) | 2012-05-09 |
Family
ID=40839398
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008100004079A Active CN101478779B (en) | 2008-01-04 | 2008-01-04 | Response method for random access of cellular wireless communication system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101478779B (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102714833A (en) * | 2011-01-11 | 2012-10-03 | 联发科技股份有限公司 | Obtaining system frame number of target cell during handover |
| WO2017215633A1 (en) * | 2016-06-17 | 2017-12-21 | 中兴通讯股份有限公司 | Method and device for receiving and processing random access response rar |
| CN107852671A (en) * | 2015-11-30 | 2018-03-27 | 华为技术有限公司 | A kind of connection control method, access device and mobile terminal |
| CN107925846A (en) * | 2015-08-27 | 2018-04-17 | 高通股份有限公司 | Concurrently decoding to one or more system information blocks (SIB) |
| CN111264087A (en) * | 2018-10-01 | 2020-06-09 | 联发科技（新加坡）私人有限公司 | MsgB multiplexing, addressing and HARQ for two-step RACH in mobile communications |
-
2008
- 2008-01-04 CN CN2008100004079A patent/CN101478779B/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102714833A (en) * | 2011-01-11 | 2012-10-03 | 联发科技股份有限公司 | Obtaining system frame number of target cell during handover |
| CN107925846A (en) * | 2015-08-27 | 2018-04-17 | 高通股份有限公司 | Concurrently decoding to one or more system information blocks (SIB) |
| CN107852671A (en) * | 2015-11-30 | 2018-03-27 | 华为技术有限公司 | A kind of connection control method, access device and mobile terminal |
| CN107852671B (en) * | 2015-11-30 | 2020-04-28 | 华为技术有限公司 | Access control method, access equipment and mobile terminal |
| WO2017215633A1 (en) * | 2016-06-17 | 2017-12-21 | 中兴通讯股份有限公司 | Method and device for receiving and processing random access response rar |
| CN111264087A (en) * | 2018-10-01 | 2020-06-09 | 联发科技（新加坡）私人有限公司 | MsgB multiplexing, addressing and HARQ for two-step RACH in mobile communications |
| CN111264087B (en) * | 2018-10-01 | 2023-09-01 | 联发科技（新加坡）私人有限公司 | Multiplexing, addressing and HARQ of MsgB for two-step RACH in mobile communication |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101478779B (en) | 2012-05-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US11330634B2 (en) | Method for sending random access preamble, method for receiving random access preamble, and apparatus | |
| US20210075574A1 (en) | Method and Apparatus for Performing Contention Based Random Access in a Carrier Frequency | |
| KR101208808B1 (en) | A method for generating the group id of the random access response message, and a random access method | |
| CN110651511B (en) | User equipment and base station participating in radio access network update procedure | |
| CN103795511B (en) | A kind of method that uplink transmission is received in base station and base station | |
| EP3569029B1 (en) | Method and apparatus for performing contention based random access in a carrier frequency of a communication network | |
| US8571006B2 (en) | Mobile communication method and radio base station | |
| US8200241B2 (en) | Terminal random access method for cellular radio communications system and method for generating group identifier | |
| CN101883437A (en) | Random access method and base station | |
| CN104641716A (en) | Methods and apparatuses for communication between a mobile terminal and a base station during a random access procedure | |
| WO2010105472A1 (en) | Method and terminal for selecting random access resource | |
| EP4369797A1 (en) | Drx configuration method and apparatus, terminal device, and network device | |
| CN101478779B (en) | Response method for random access of cellular wireless communication system | |
| CN113748713A (en) | System and method for enhanced random access procedure | |
| US8780884B2 (en) | Mobile radio device synchronization | |
| US20230044554A1 (en) | Communication method and communication apparatus | |
| US11515990B2 (en) | Control using NR TDD | |
| CN112584544B (en) | Random access procedure | |
| CN114826513A (en) | Terminal identification method and equipment | |
| US12143341B2 (en) | Control using NR TDD | |
| US20240334449A1 (en) | Wireless communication method and device thereof | |
| KR20220102496A (en) | Method and apparatus for random access in communication system | |
| KR20200114976A (en) | Method and apparatus for configuration of resource pool in wireless communication system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |