CN104918320A - LTE terminal high-speed straight-through method and terminal - Google Patents

Abstract

The present invention provides a high-speed direct connection method for an LTE terminal and a terminal. The method includes the time synchronization of the direct connection terminal through the prior art, and is in the called state by default; the terminal uses the uplink and downlink subframe ratio 1 or If the ratio is 0, a fixed period blind solution resource is set in its receiving subframe, and blind solution is performed on this resource; when the terminal resolves its own identity, it immediately communicates according to its own air interface timing; when the terminal makes a call , by offsetting its own clock and adjusting the ratio of its uplink and downlink subframes, the sending subframes and receiving subframes of the calling and called terminals are completely corresponding to each other; The first communication between the calling and called terminals can be established by sending the identification of the terminal to be called on the blind solution resource. The terminals subsequently ensure that each other can complete the transmission and reception work according to the characteristics of the timing sequence. The system realizes direct communication between terminals.

Description

LTE terminal high-speed direct connection method and terminal

technical field

The present invention relates to the communication field, and in particular to an LTE high-speed direct connection method and terminal.

Background technique

The technology of direct communication between terminals is still at the 2G level, and what is transmitted between terminals is only voice services, which is far from meeting actual requirements. Terminals are also faced with the need for data service transmission.

At present, the public network has entered the LTE era, and the existing emergency solutions implement emergency communications through temporary construction of emergency access networks. However, the emergency access network activated under special circumstances has the risk of being attacked again. At the same time, it is not possible to successfully build an emergency system in any place at any time, so the demand for direct connection of LTE terminals is particularly obvious.

The current problem is that, according to the existing protocol, all through-connect terminals can only send or receive data at the same time, which makes it impossible to transmit data between terminals. Therefore, the main obstacle faced by the terminal direct connection is that the terminals cannot form a corresponding relationship between receiving and sending, and cannot ensure that there is a simultaneous correspondence between receiving subframes and sending subframes between terminals.

Contents of the invention

The present invention provides a high-speed through-through method for LTE terminals and a terminal, which are used to overcome the problem of uncoordinated transmission and reception between terminals in the existing LTE technology, or failure to make full use of air interface resources even though coordination is achieved.

In order to achieve the above object, the method for high-speed direct communication of LTE terminals provided by the present invention includes:

Through the time synchronization achieved by the existing technology, the direct terminal is in the called state by default; the terminal uses the uplink and downlink subframe ratio 1 or 0 by default, and sets a fixed-period blind solution resource in its receiving subframe.

The terminal resolves on the blind solution resource, and when it resolves its own identity, it immediately uses a fixed MCS (Modulation and Coding Scheme, modulation and coding strategy) and agreed RNTI (Radio Network Temporary Identifier) according to its own air interface timing. , Network Temporary Identity) to communicate.

When the terminal makes a call, it adjusts its own subframe ratio by offsetting its own clock, and the adjusted subframe ratio is ratio 0 or ratio 1, so as to realize the sending subframe and receiving subframe between the calling and called terminals. The subframes correspond exactly.

The calling terminal can establish the first communication between the calling terminal and the called terminal by sending the identification of the terminal to be called on the resources of the called terminal blind solution through a fixed modulation mode. Subsequent terminals ensure that each other can complete the transmission and reception work according to the characteristics of timing. The system realizes direct communication between terminals.

In order to achieve the above object, a method for retransmitting data in a cluster service provided by the present invention includes:

The terminal realizes time synchronization through the existing technology, and is in the called state by default, including:

The terminal uses uplink and downlink subframe ratio 1 or ratio 0 by default, sets blind solution resources with a fixed period in its receiving subframe, and uses fixed RNTI and MCS to perform analysis on the blind solution resources.

When the terminal makes a call, it adjusts its own uplink and downlink subframe ratio by offsetting its own clock, and the adjusted subframe ratio is ratio 0 or ratio 1, so as to realize the transmission between the calling and called terminals. The subframe corresponds to the receiving subframe one by one, and also includes:

The receiving subframes are D subframes and S subframes in LTE. When the terminal sends data to the opposite end through the sending subframe and the receiving subframe of the opposite end is an S frame, only the same symbol of the S frame is used for transmission.

The terminal selects a modulation method according to its own timing relationship and according to the requirements of the other party, and sends the data to the opposite end, and the other end analyzes according to the modulation mode required by itself, and then communicates with each other, including:

After the communication ends, the calling terminal restores the clock and the ratio of the uplink and downlink subframes to the original called setting, and restores to the state of the called terminal as a whole.

In order to achieve the above purpose, a terminal provided by the present invention includes:

The clock module is used to realize the time synchronization between the transmission and reception between LTE terminals; meanwhile, it provides the clock adjustment function;

The timing module is used for the calling terminal to adjust the ratio of its uplink and downlink subframes according to the timing of the receiving terminal, so as to realize the one-to-one correspondence between the sending subframes and receiving subframes of the calling and called terminals;

A blind solution module, configured to configure periodic blind solution resources for the terminal, and try blind solutions on the blind solution resources;

The receiving module is used to receive data sent to itself by other terminals according to its own timing;

The sending module is used to send its own data to other terminals according to its own timing;

The modulation module is used to perform modulation according to the fixed MCS and RNTI at the initial stage of communication, and analyze according to the MCS specified by itself for the peer end after the communication is established; perform modulation according to the MCS specified by the peer end;

The judging module is used to judge whether there are other terminals calling itself according to the result of the blind solution. After the communication is established, the terminal communicates according to the MCS and RNTI required by the opposite end and according to its own timing;

The calculation module is used to calculate the position of the sending subframe corresponding to the special subframe S in the receiving subframe, and on this subframe, the symbol of the transmission data used in the sending subframe is consistent with the symbol of the S frame.

The method and terminal for high-speed direct connection of LTE terminals provided by the present invention, the method includes the time synchronization of the direct terminal through the prior art, and is in the called state by default; the terminal uses the uplink and downlink subframe ratio 1 or ratio 0 by default , set a fixed blind solution resource in its receiving subframe, and perform blind solution on this resource; when the terminal resolves its own identity, it immediately communicates according to its own air interface timing; when the terminal makes a call, it uses the Offset its own clock, adjust the ratio of its uplink and downlink subframes, and realize that the sending subframes and receiving subframes of the calling and called terminals are completely corresponding to each other; The first communication between the calling and called terminals can be established by sending the identification of the terminal to be called on the resource. Subsequent terminals ensure that each other can complete transmission and reception according to the characteristics of timing. The system realizes direct communication between terminals.

Description of drawings

FIG. 1 is a schematic diagram of a called process of an LTE terminal high-speed direct connection method provided by Embodiment 1 of the present invention;

FIG. 2 is a schematic diagram of a calling process of a high-speed direct connection method for an LTE terminal provided in Embodiment 2 of the present invention;

FIG. 3 is a schematic structural diagram of an LTE terminal high-speed direct connection terminal provided by Embodiment 3 of the present invention.

Detailed ways

In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments.

FIG. 1 is a schematic diagram of a called process of a high-speed direct connection method for an LTE terminal according to Embodiment 1 of the present invention. As shown in Figure 1, the method includes the following steps:

101. The system sets fixed blind solution air interface resources for the terminal in the called state.

The blind solution resource is a fixed air interface resource set by the terminal in a receiving subframe of the terminal according to a fixed period before the direct connection. The resource is an air interface resource that exists periodically, and the specific definition of the resource can refer to the 36 series protocol definition of the 3rd Generation Partnership Project (3GPP for short), which will not be described here.

It should be noted here that the LTE terminal pass-through is only an emergency solution when there is no access network. Therefore, pass-through is performed only when there is a need for pass-through. It only needs to complete the corresponding parameter configuration before the direct connection function is enabled, and in addition, the time synchronization method between terminals direct connection adopts the existing technology.

102. The called terminal performs blind solution on the blind solution resource.

The called terminal performs blind solution on the blind solution resource according to the predetermined RNTI and MCS. Both the RNTI and the MCS are configured simultaneously with the blind solution resource setting of 101 .

103. Search for your own identity in the analysis result, and if your own identity is found, then further search for the air interface resource where the peer end receives the first response, otherwise, do not perform any processing.

According to the timing relationship between the calling party and the called party, the number of symbols in the sending subframe corresponding to the receiving subframe at the opposite end being the S subframe is calculated. It is determined that the sending subframe corresponding to the special subframe only uses the air interface resource corresponding to the symbol of the special subframe for transmission.

104. Send data in the own sending subframe according to the own timing.

The RNTI and MCS of the data to be sent are the same as 102, and at the same time, the RNTI, MCS and air interface resources used by the opposite end to send data next time are agreed upon.

The air interface resource used this time is determined by the indication in the analysis result of 103 .

105. Parse the data sent by the peer

On the air interface resource specified by 104, according to the RNTI and MCS specified by 104, analyze the data sent by the opposite end.

In the called procedure for implementing high-speed direct connection of LTE terminals provided in this embodiment, the terminal configures blind solution resources, and the terminal in the called state performs analysis according to the fixed RNTI and MCS on the blind solution resources. Judging whether there is a terminal calling itself by whether it resolves to its own identity; by specifying the air interface resource, RNTI and MCS used for the next transmission to the opposite end, determine the parameters of its own air interface analysis next time.

FIG. 2 is a schematic diagram of a calling process of a high-speed direct connection method for an LTE terminal according to Embodiment 2 of the present invention. As shown in Figure 2, the method includes the following steps:

201. The calling terminal is in a calling state by adjusting its uplink and downlink subframe ratio and clock.

The calling terminal adjusts the ratio of its uplink and downlink subframes and the clock, so that after the adjustment, the calling and called terminals have corresponding receiving subframes and sending subframes;

202. The terminal in the calling state sends the identifier of the target terminal and the air interface resource for receiving the response on the blind solution resource of the terminal in the called state.

The target terminal is a terminal called by the calling terminal, and the RNTI and MCS of the air interface data sent are the same as those used by the called terminal for blind solution.

203. The calling terminal receives a response from the called terminal.

The calling terminal analyzes the air interface resources specified in 202 according to the LTE timing, which can refer to the 36 series protocols of 3GPP.

204. According to the data received in 203, on the air interface resource specified by the data, send its own data according to the RNTI and MCS specified by the data.

205. The calling terminal subsequently transmits data according to the resource specified by the called terminal and its usage mode until the data transmission is completed.

206. After the data transmission of the calling terminal is completed, the calling terminal returns to the original called state.

This embodiment provides the process of realizing the direct connection of the LTE terminal to the caller. The LTE terminal adjusts itself. Above, use fixed RNTI scrambling, fixed MCS order selection, send the identity of the terminal you are going to call, and accept the corresponding resources of the opposite end, notify the opposite end that you need to establish contact with it, and resolve the call on the predetermined resources. terminal response. Thereby establishing a direct connection between them.

FIG. 3 is a schematic diagram of a high-speed pass-through terminal for an LTE terminal according to Embodiment 3 of the present invention. As shown in FIG. 3 , the terminal includes: a receiving module 31 , a blind solution module 32 , a subframe ratio adjustment module 33 , a judgment module 34 , a clock module 35 , a modulation module 36 , a sending module 37 and a calculation module 38 .

Among them, the receiving module 31, when the terminal is in the called state, the receiving module is initially receiving the signal of the blind solution resource, and after the first communication between the terminals, the receiving module receives the data transmitted from the communication peer.

Further, when the terminal is in the called state, to establish the first communication, the receiving module receives data according to the initial configuration. After the first communication, the receiving module receives according to its own air interface timing.

The blind solution module 32 is configured to analyze the signal received by the air interface resource on the blind solution resource when the terminal is in the called state.

The subframe ratio adjustment module 33 is used to adjust the subframe ratio according to its default uplink and downlink subframe ratio when the terminal becomes the calling party. The default ratio is 0, and the ratio is adjusted to 1; otherwise, On the contrary. After the communication ends, the calling terminal restores the ratio of uplink and downlink subframes to the original setting, and returns to the default called state as a whole.

The judging module 34 completes the air interface transmission according to the LTE air interface timing.

The clock module 35 performs clock adjustment according to the default ratio of uplink and downlink subframes, and realizes synchronization between reception and transmission of LTE terminal direct access according to the prior art.

The modulation module 36 modulates and scrambles the transmitted data according to the judgment result of the judging module, and analyzes the received data.

The sending module 37 sends the data to the air interface according to the result of the judging module.

The calculation module 38 is configured to calculate the symbols used in the sending subframe corresponding to the peer special subframe.

In this embodiment, to achieve high-speed direct communication of LTE terminals, the calling and called terminals use the complementarity of the uplink and downlink subframe ratio 1 and the uplink and downlink subframe ratio 0, and adjust the clock of the calling terminal to realize the connection between the calling terminal and the called terminal. The air interface resources between the terminals are fully utilized, and the calling and called terminals only need to complete the communication between the calling and called terminals according to their own timing. At the same time, between the calling party and the called party, due to the full use of air interface resources, the effect of high-speed transmission is achieved.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, rather than limiting them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: It is still possible to modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the technical solutions of the various embodiments of the present invention. scope.

Claims (8)

1. the method that LTE terminal is straight-through at a high speed, is characterized in that, comprising:

Straight-through terminal is synchronously temporal by existing techniques in realizing, and acquiescence is in called state; Described terminal acquiescence uses ratio of uplink subframe to downlink subframe 1 or proportioning 0, receives subframe arrange cycle fixing blind solution resource at it;

Described terminal, by resolving in blind solution resource, when being resolved to the mark of oneself, namely immediately according to the sequential of eating dishes without rice or wine of oneself, communicates with agreement RNTI with fixing MCS;

When terminal is called out, by offseting the clock of oneself, adjust the ratio of uplink subframe to downlink subframe of oneself, the subframe proportioning after adjustment is proportioning 0 or proportioning 1, realizes calling and called terminal transmission subframe each other and receive subframe completely corresponding;

Calling terminal, by fixed modulation mode, the blind solution resource of terminal called sends the terminal iidentification that will call out, can set up the communication first between calling and called terminal;

Subsequent terminal, according to the feature of sequential, is guaranteed can complete transmitting and receiving work each other;

System achieves the direct communication between terminal.

2. the method that LTE terminal according to claim 1 is straight-through at a high speed, is characterized in that, described terminal is synchronously temporal by existing techniques in realizing, and acquiescence is in called state, comprising:

Described terminal acquiescence uses ratio of uplink subframe to downlink subframe 1 or proportioning 0, receives subframe and arranges cycle fixing blind solution resource, blind solution resource is resolved with fixing RNTI and MCS at it.

3. the method that LTE terminal according to claim 1 is straight-through at a high speed, it is characterized in that, when described terminal is called out, by the clock by skew oneself, adjust the ratio of uplink subframe to downlink subframe of oneself, subframe proportioning after adjustment is proportioning 0 or proportioning 1, realizes described calling and called terminal transmission subframe each other and receives subframe corresponding one by one, comprising:

Described reception subframe is D subframe in LTE and S subframe, and when terminal sends data by sending subframe to opposite end, opposite end receives subframe simultaneously when being S subframe, just and S subframe same-sign transmit.

4. the method that LTE terminal according to claim 1 is straight-through at a high speed, is characterized in that,

Described terminal according to time oneself sequential relationship, according to the requirement selecting modulation mode of the other side, data are mail to opposite end, the modulation system that opposite end requires according to oneself is resolved, and can intercom mutually, comprise:

Clock and ratio of uplink subframe to downlink subframe, after sign off, are reverted to initial setting by described calling terminal, and entirety reverts to the state of described terminal called.

5. a terminal, is characterized in that, comprising:

Clock module, for the time synchronized realizing transmission between LTE terminal and between receiving; Clock adjustment function is provided simultaneously;

Tfi module, for the sequential of described calling terminal according to described receiving terminal, adjusts the ratio of uplink subframe to downlink subframe of oneself, and the transmission subframe and the reception subframe that realize described calling and called terminal are corresponding one by one;

Blind solution module, for being the periodic blind solution resource of terminal configuration, and attempts blind solution in blind solution resource;

Receiver module, for receiving according to the sequential of oneself data that other terminal sends to oneself;

Sending module, sends to other terminal for the data sending oneself according to the sequential of oneself;

Modulation module, at the communication initial stage, modulate according to fixing MCS and RNTI, after connection setup, the MCS specified for opposite end according to oneself resolves; The MCS specified according to opposite end modulates;

Judge module, for the result according to blind solution, judged whether that other terminal is in calling oneself, after the communication has been established, namely terminal according to MCS and RNTI that opposite end requires, communicates according to the sequential of oneself;

Computing module, for calculating the position receiving the transmission subframe that special subframe S is corresponding in subframe with opposite end, in this subframe, sending subframe institute and using the symbol transmitting data consistent with the symbol of S frame.

6. terminal according to claim 5, it is characterized in that, described tfi module is specifically for being proportioning 0 or proportioning 1 according to the ratio of uplink subframe to downlink subframe of described terminal called, and the ratio of uplink subframe to downlink subframe correspondence of oneself is revised as proportioning 1 or proportioning 0 by described calling terminal; After sign off, the sequential proportioning of oneself is adjusted to the called ratio of uplink subframe to downlink subframe of initial acquiescence by speaker's terminal.

7. terminal according to claim 5, is characterized in that, described clock module is synchronous specifically for receiving terminal and transmitting terminal, also comprises:

Described calling terminal, shifts to an earlier date 2 TTI or postpones 2 TTI by the clock of oneself, the transmission subframe and the reception subframe that realize described calling and called terminal are corresponding one by one;

After sign off, the clock recovery of oneself is the called clock configuration of initial acquiescence by calling terminal.

8. terminal according to claim 5, is characterized in that, described computing module just specifically for, according to the result of clock module and sequential adjustment adjustment, calculate the U frame that oneself and opposite end S frame are corresponding, and the symbol that this transmission frame can use.