CN101617556B - System and method for providing communication in a radio communication system - Google Patents

Abstract

The invention relates to a method for providing communication in a radio communication system comprising a radio transceiver, the communication of a user entity within the coverage area of the radio transceiver consists of a first communication between the radio transceiver and the user entity link bearer. The method comprises the steps of: sending a signal to said user entity when a synchronization state of said first communication link between said user entity and said radio transceiver is not established in said radio transceiver, and , allocating radio transmission resources to said user entities in said first communication link after a first period of time has elapsed. The invention also relates to a system, a user entity and a communication system.

Description

A system and method for providing communication in a radio communication system

technical field

The present invention relates to the field of radio communication, in particular to a method, device and system for providing communication in a radio communication system. the

Background technique

Wireless mobile communication systems are usually cellular, i.e. the overall coverage area of such a system is divided into smaller areas, where each of these smaller areas is associated with a radio base station having one or more radio transceivers A machine providing communication resources via a radio interface to communicate with a User Entity (UE), such as a mobile phone, a smart phone or a handheld computer with communication capabilities located in said area. These areas are often referred to as cells. the

This communication system allows the interface between the UE and the network (i.e. the connection to the radio transceiver) to move by connecting the UE to a different radio transmitter as the UE moves within the network to support mobility . the

Furthermore, these communication systems also provide mobility in the sense that a user entity can move within the coverage area of a given radio transceiver, i.e. the distance from the user equipment to the same radio transceiver can be completely controlled while the communication is in progress. Change. the

An example of such a communication system is the current Third Generation Partnership Project (3GPP) effort to define a future cellular communication system, now called Evolved Universal Terrestrial Radio Access (E-UTRA) or Long Term Evolution (LTE). In the LTE system it has been decided to use a transmission scheme called Single Carrier Orthogonal Frequency Division Multiple Access (SC-OFDMA) in the uplink, ie communication from the user entity to the radio base station. In this scheme, users are multiplexed in time and frequency. It is therefore required that uplink transmissions from different user entities (UEs) arrive at the base station (eNodeB or eNB) at relatively synchronized times to comply with a predetermined slot structure. the

Physically, UEs are distributed in the network, and they have different propagation delays to eNBs, therefore, methods for compensating for these differences are needed to prevent data transmitted from these user entities from colliding at eNBs. In LTE, it has been decided that when a timing offset is measured by the network, a timing advance (TA) value signal is sent from the eNB to the UE. The timing advance value generally corresponds to the time required for a signal to reach the base station (eNB) from the user entity. the

When the UE is already synchronized, ie the transmission on the communication link (uplink) from the UE to the eNB has been synchronized, it will remain in sync until it determines that it has lost synchronization. This may be the case, for example, that the UE moves far enough away from the eNB that it falls out of sync. Furthermore, UEs that move in the radio network without using the uplink for a period of time will eventually lose their uplink synchronization. the

When the UE needs to re-acquire uplink synchronization, it has to use a procedure specially designed for this scheme. In the LTE system, this procedure is called Unsynchronized Random Access (NSRA). However, this process has many drawbacks. the

For example, NSRA is contention-based, so it can only handle relatively low loads before it becomes congested. This results in lower resource utilization. Moreover, since the UE does not know the exact reception timing at the base station, it has to use a certain amount of guard time as an interval to other users, which leads to a further reduction in resource utilization. the

Therefore, there is a need for a method for providing communication in a radio communication system which eliminates or at least reduces the drawbacks of current solutions. the

Contents of the invention

SUMMARY OF THE INVENTION An object of the present invention is to provide a method of providing communication in a radio communication system to solve the above-mentioned problems. This object is achieved by a method according to the characterizing part of claim 1 . the

Another object of the present invention is to provide a system which solves the above-mentioned problems. This object is achieved by a system according to the characterizing part of claim 46 . the

The present invention provides a method of providing communication in a radio communication system comprising a radio transceiver, wherein communication of a user entity within the coverage area of the radio transceiver is carried out by the radio transceiver with the user A first communication link bearer between entities. The method comprises the steps of: transmitting a signal to said user entity when a synchronization state of said first communication link between said user entity and said radio transceiver is not available in said radio transceiver, when via After a first time period, radio transmission resources are allocated to said user entities in said first communication link. the

This has the advantage that when the communication system receives data to be transmitted to the user entity, the communication system (radio transceiver) does not need to know the current synchronization state of the communication link from the user entity to the radio transceiver, i.e. the uplink Synchronization state of the road. Resource allocation is performed independently of the synchronization status and is performed by waiting for a period of time which may be set to such a length that the user entity has time to perform the synchronization request before said period of time elapses. So, similar to existing systems, it is possible to ensure that communication is always possible, provided that it has the advantage that it can be ensured and performed irrespective of whether the user entity is synchronized when the communication is initiated by the radio transceiver . the

The invention further has the advantage that the signaling regarding the synchronization procedure in the network can be substantially reduced. the

In an optional embodiment, resources of said first communication link are allocated to said user entity before receiving a response from said user entity, even if between said user entity and said radio transceiver A synchronization state of the first communication link between the radio transceivers is not established. This approach has the advantage that even though the user entities have to be synchronized when the communication is initiated, the delay in data transmission is substantially reduced. the

Other features of the present invention and their advantages will become apparent from the following detailed description of the preferred embodiments and accompanying drawings, which are given by way of example only and should not be construed as limiting in any way. the

Description of drawings

Fig. 1 shows an example of a Long Term Evolution (LTE) system in which the present invention can be preferably used. the

Figure 2 shows UEs with different propagation delays without proper timing advance. the

Figure 3 shows an example of a Non-Synchronized Random Access Burst (NSRA) procedure. the

FIG. 4 shows downlink access for UEs synchronized in uplink. the

FIG. 5 shows downlink access for UEs that are not synchronized in uplink. the

Fig. 6 shows a state machine controlling the uplink synchronization state of a UE. the

Fig. 7 shows a first exemplary embodiment according to the invention. the

Fig. 8 shows an alternative exemplary embodiment according to the invention. the

Fig. 9 shows another exemplary embodiment according to the present invention. the

Figure 10a shows an exemplary embodiment, where an unsynchronized UE is in the "Unknown Sync" state. the

Fig. 10b shows an exemplary embodiment where a synchronized UE is in an "Unknown Sync" state. the

Detailed ways

As mentioned above, the Third Generation Partnership Project (3GPP) Radio Access Network (RAN) Working Group (WG), which has defined the UMTS Universal Terrestrial Radio Access Network (UTRAN), is currently defining the Long Term Evolution (LTE) Work Item (WI ) in future cellular communication systems. the

1 is a schematic diagram of the structure of an LTE system 100, which includes two kinds of nodes, radio base stations (static radio transceivers) and eNBs (enhanced Node B) 101-103, and access gateways (aGW) 104-105, wherein eNB 101 - 103 belongs to Evolved UTRAN (E-UTRAN) 106 and aGW belongs to Evolved Packet Core (EPC) 107 . The User Entity (UE) 108 is connected to the network (E-UTRAN and EPC) by means of a radio interface, the Uu interface 109 . The eNBs 101-103 handle communications on the radio interface within a certain coverage area, ie a cell, where the radio signal is strong enough to allow satisfactory communication with UEs within said area. the

When a UE 108 moves within the coverage area provided by the communication system, the UE 108 will move from one cell to another, and therefore, the ongoing communication will be transferred from the eNB to which the UE currently belongs, that is, the serving cell, to the UE The entering cell is the target cell. This is done by establishing a communication channel on the Uu interface of the target cell and terminating the communication channel on the Uu interface of the source cell. While communication is ongoing, the eNB is constantly receiving transmissions from the UE, and if the eNB determines that the UE needs to adjust its Timing Advance (TA), e.g. due to an increase or decrease in the distance from the UE to the eNB, the appropriate TA will be sent to UE. However, in many applications data is transmitted intermittently rather than continuously from the eNB to the UE, eg when an application has data to be transmitted to the UE or when a web page is loaded into the user entity's web browser. In this case, the synchronization required between the UE and the eNB will be lost simultaneously between data transmissions, as will be described below. the

As described above, SC-OFDMA (Single Carrier Orthogonal Frequency Division Multiple Access) has been used in uplink in LTE. In this scheme, users are multiplexed in time and frequency, and thus require uplink transmissions from different user entities (UEs) to arrive at the eNB at relatively calibrated times to comply with a predetermined slot structure. Figure 2 shows a SC-OFDMA scheme for single frequency. As can be seen from the figure, four UEs, UE1...UE4 are allocated to time slots TS1..... .TS4. UE1 and UE2 are time-aligned correctly, i.e. reception of their transmissions both start and end within their respective slots, and therefore, do not affect transmissions from other UEs. However, the transmission from UE3 starts too late, so although its reception starts in TS3, it continues until about the fourth TS4, colliding with the transmission from UE4, thus destroying both transmissions. This situation occurs when UEs that are physically distributed in the network and have different propagation delays to the eNB start transmitting in an essentially unsynchronized manner due to e.g. variations in distance and/or Or obstruction of objects on the path to the eNB. Therefore, a method of compensating for these differences is needed to avoid the situation disclosed in FIG. 2 . Furthermore, a UE that moves in the radio network and does not use the uplink for a period of time will eventually lose its uplink synchronization due to changes in the distance from the UE to the eNB. In order to regain uplink synchronization, specially designed procedures have to be used. In LTE, it has been decided to signal a Timing Advance (TA) value from the eNB to the UE when the network measures a timing offset using Unsynchronized Random Access (NSRA) (note that the given structure is currently only proposed no final decision, so this process is for illustrative purposes only), Figure 3 illustrates this situation and will be described below. the

In LTE, usually during the random access procedure, the eNB has to perform timing estimation when the received signal is measured. The eNB then sends an appropriate timing advance command to the UE, which adjusts uplink transmission timing accordingly. the

In SC-OFDMA, the time domain is divided into frames, where each frame is divided into the smallest allocable period of time, namely a slot, or Physical Resource Block (PRB), whose length corresponds essentially to the number of minutes a UE is allowed to transmit Transmission Time Interval (TTI). PRB(TTI) can be 0.5 ms or 1 ms, for example. In the example described, PRB(TTI) is equal to 1 ms. The NSRA request is sent on the Random Access Channel (RACH). RACH resources can be located arbitrarily and can include, for example, one or more TTIs. There may be multiple consecutive TTIs of a single frequency allocated to RACH. Additionally, or further, such RACH resources may also be allocated on multiple frequencies. For example, RACH resources may be regenerated periodically, eg, every 20 ms. the

An unsynchronized UE wishing to establish or re-establish communication with the eNB sends an NSRA request, e.g. on such a Random Access Channel (RACH), and an NSRA request consists of two parts: a preamble, which is sent before the transmission of the second part SMS, and higher-level messages. However, this higher layer message is only sent when authorized by the eNB. the

A guard time is required at the end of the TTI in order to avoid interference with subsequent communication resources, i.e. to prevent the eNB from receiving RACH signals during resources dedicated to data transmission, taking into account any time synchronization uncertainty. That is, the preamble is made shorter than, for example, 1 ms. The duration of the guard interval should take into account the period delay and delay spread. It can be understood that the required guard time depends on the cell size, and a larger cell size requires a longer guard time. As seen from the figure, the preamble is preceded by a cyclic prefix (CP) which has a function corresponding to a guard time. the

However, the shortened preamble is still sufficient for the eNB to estimate the reception timing of a specific UE and signal the TA message as described above. But this process suffers from the following drawbacks:

NSRA is contention-based, which means that even if an eNB is able to handle access attempts from more than one UE in a single RACH at the same time, it can only handle a relatively low load before it becomes congested, thus resulting in reduced resource utilization. Furthermore, the delay before the process ends can become considerable due to the possibility of collisions. Moreover, since the UE does not know the exact reception timing at the eNB, it has to use a certain amount of guard time as an interval to other users, which leads to a further reduction in resource utilization. the

Therefore, due to these drawbacks, it is advantageous to keep the amount of uplink access required to use NSRA to a minimum, ie the time period between synchronizations of specific UEs should be kept as long as possible. the

Normally, the network and the UE have the same understanding of the synchronization state of a specific UE, that is, whether the UE is synchronized or not. The reason for this need can be derived from the synchronous hybrid retransmission (HARQ) scheme chosen for the downlink. For downlink access, the network knows when to expect a response in the form of ACK/NACK. This is illustrated in Figure 4, where in step 401 the eNB receives data to be sent to the UE, after which in steps 402 and 403 the eNB starts transmission in one or more data streams (data processes). In step 405 and step 405, when the UE is synchronized, the eNB knows that an acknowledgment or negation message will be received at a specific time. the

The indication of the time resource in the acknowledgment and/or acknowledgment messages can be implicit based on the reception time of said signal, i.e. if the time resource includes a time slot, then the ACK/NACK for that particular time slot should be number of slots later, for example three slots later. the

On the other hand, if the UE is not synchronized, the ACK/NACK response can only be delayed to give time for the NSRA procedure. This is illustrated in Figure 5, where in step 501, after the eNB has received data for transmission to the UE, in step 502 the eNB pages the UE. When the UE receives the paging message, it tries the RACH signaling procedure to acquire synchronization. However, if the RACH is congested, multiple attempts from step 503 to step 505 may be required to enable the eNB to successfully decode the UE's RACH preamble and determine the appropriate TA, which is sent to the UE at step 506 . As can be seen from the figure, when the UE is synchronized, a delay 507 between the point in time at which data transmission can start and the point in time 508 at which data transmission actually begins does exist. From the time point when data transmission starts, the process in FIG. 5 is equivalent to the process in FIG. 4 . the

Next, if the network and the UE have the same view on the UE uplink synchronization state, then an access method can be selected appropriately according to FIG. 4 or 5 . the

This decision (selection of procedure) may be based eg on a timer since the last uplink access. When the timer expires, the UE will be considered unsynchronized on the uplink. Given a period of inactivity and eg a hypothetical maximum speed at which the UE can occur in the network (eg 500 km/h), the synchronization state of the UE can be determined based on these criteria. the

However, if the timers for all UEs are set to the same value, i.e. corresponding to the worst case UE speed (e.g. 500km/h like above), then after a relatively short period of time the lower mobile Active UEs will still be considered unsynchronized, thus resulting in reduced network performance and possible overuse of NSRA. the

The present invention provides a solution which overcomes or at least reduces the drawbacks of current solutions. According to the present invention, the UE autonomously decides its uplink synchronization status when the network does not know the synchronization status of the mobile station. The advantage of this is that the amount of uplink access using NSRA can be substantially reduced. In addition, according to the present invention, the system does not need to know the current synchronization state of the UE, but from the perspective of the system, the communication process can be the same regardless of whether the UE is synchronized or not. the

Since the system and the UE do not necessarily agree on a state of synchronization, it is up to the UE to determine how long it will be considered in-sync. When a UE becomes in-sync, it will stay in sync until it moves far enough out of sync (e.g., in an exemplary system where the sync requirement is 1 μs, the UE is about 150 meters in radius to the radio base station will be considered synchronized within a distance of ). Thus, according to the invention, the UE can remain in sync longer than a system that has to consider the worst case. the

There are various methods available to the UE to extend the time it remains synchronized, a non-exhaustive list of available methods include:

- precise timing interval reference, and

- Positioning system, like GPS or any other positioning system. the

These approaches also have the advantage that low mobility mobiles (stationary or pedestrian mobiles) can stay in sync longer, reducing NSRA attempts and thus enhancing system resource utilization. For example, UEs may be arranged to estimate their own speed, set an interval timer based on the estimated speed, and when this timer expires, the UE determines itself to be out of sync. the

Figure 6 discloses a state machine for controlling the uplink synchronization state of a UE according to the present invention. According to prior art, the UE can either be in the "Sync" state 601, where both the UE and the network know that the UE is synchronized, or in the "Unsync" state 602, where the UE is considered unsynchronized by itself and the network. The UE may request to enter the "synchronized" state 601, for example via NSRA. After a predetermined time elapses, eg set by timer 1 as described above, the UE is again determined to be out of sync. According to the invention, however, the UE is allowed to be in the "Unknown Sync" state 603 . For example, the UE may enter state 603 when the aforementioned timer 1 overflows. If the network needs to access the UE in state 603, the standard access method of Fig. 4 or 5 cannot be used due to the synchronous HARQ scheme described above. Instead, some alternative methods have to be used. In the following, exemplary embodiments of the present invention will be described with reference to Figures 7-10b. The premise for all presented examples is that the UE is in the "unknown synchronization" state according to Fig. 6 and the network needs to initiate access to the UE in the downlink, eg to send data. The UE can be in the "Unknown Synchronization" state 603 for a longer period of time than timer 1. This delay can be determined by the UE itself according to the above, or it can be determined by the second timer - timer 2 - set by the network. determined, the UE will be unconditionally returned to state 602 in this case. However, the time limit of timer 2 can be set to be longer than that of timer 1, thereby substantially reducing NSRA attempts in the system and improving resource utilization. When used according to the invention, the network will not know whether the UE is in state 602, at least not until timer 2 expires. the

After receiving the data for transmission to the UE in step 701, in step 702 the network performs "paging" of the UE, ie it sends a short message to inform the UE about the upcoming downlink transmission. Time 703 is then given to allow the UE to acquire uplink synchronization, if required. If no uplink synchronization request is received within time interval 703, that is, the UE has determined that it is synchronized, the eNB starts transmission with one or more data streams (data processes) in steps 704 and 705, and allocates Uplink resources 706, 707 are given to the UE for transmission of acknowledgment messages. Since the UE is synchronized, acknowledgment or acknowledgment messages with appropriate TAs will be transmitted such that they are received at the eNB at the expected times, ie at 706 and 707 . On the other hand, if the UE determines that it is not synchronized, i.e. it is in state 602 in FIG. 6 , the UE may use NSRA procedures for example within time interval 703 to acquire synchronization. The time interval 703 may be set such that a suitable number of NSRA attempts may be performed and rejected, eg, due to contention, before a successful NSRA attempt is acquired. The present invention has the advantage that the reduction in NSRA signaling allows the use of a shorter time period 703 than in the prior art. The embodiment described in Fig. 7 has the advantage that the network can allow the UE's synchronization status to be "unknown sync" and thus the UE can decide its own synchronization status and use NSRA if required. the

Also need to consider the delay for NSRA, i.e. time period 703, which means that the packet delay will not be reduced relative to the case where the in-sync state is based on timers and worst case UE speed, unless of course reduced NSRA signaling like above Saying so makes the time period shorter. However, the NSRA procedure is contention based and includes power ramping, so the delay is unpredictable and has to be considered a worst case delay for the procedure. Even so, NSRA signaling in the network is reduced. the

In an alternative embodiment of the example disclosed in FIG. 7, it is not determined whether an uplink synchronization request may be received within the time interval 703, but anyway, when the time interval elapses, the eNB starts A data stream (data process) is transmitted. The advantage of this is that the UE has time to perform synchronization, if required, for example by transmitting an NSRA procedure as above, or in any other suitable way, i.e. without signaling to a specific eNB make. the

An alternative embodiment according to the present invention is shown in FIG. 8 . In this embodiment, the transmission of an explicit paging message is omitted, instead, in step 802, the network sends user data to the UE. Then, a time period 803 corresponding to time period 703 in FIG. 7 is used for the UE to perform NSRA procedures, if required. When the time elapses and no NSRA request is detected, the network continues to send data at step 804 and allocates resources 805, 806 for ACK/NACK in the uplink, ie the network continues normal data transmission. The embodiment according to Fig. 8 has the advantage that the packet delay is slightly reduced relative to the procedure in Fig. 7, since the data is used as explicit paging. However, the time used for the RSNA process still needs to be considered. the

A schematic procedure similar to that shown in Fig. 8 is shown in Fig. 9, except that in the first phase (ie before ACK/NACK is received) multiple HARQ processes 902, 903 are sent. The number of processes sent may eg be equal to the maximum number of processes allowed by the particular HARQ scheme used. This embodiment has the advantage that the network behavior is similar to normal network behavior, except for the delay before the first ACK/NACK message is received, if the UE is synchronized. This embodiment has the same packet delay as that associated with the embodiments of FIGS. 7 and 8 . the

An exemplary embodiment is shown in Figs. 10a-b, where the packet delay is reduced relative to the embodiment in Figs. 7-9 for a synchronized UE in "unknown sync" state. In this embodiment, the network uses multiple HARQ processes to transmit data and allocates uplink resources 1004, 1005 for regular ACK/NACK responses immediately (see FIG. There is no delay before the buffer overflows, and the procedure is similar to that described in Figure 4 for a synchronized UE whose synchronization status is known to the network. After the transmission of 1002 and 1003, the network also detects whether the allocated ACK/NACK resource 1004, 1005 is used by the UE. If resources are used, then the transmission of data continues until all data is sent. the

If ACK/NACK resources 1004, 1005 are not used, then the network assumes that the UE is not synchronized, i.e. NSRA procedure is required, and allocates resources 1006, 1007 for delayed ACK/NACK messages, where the delay is similar to that of the above embodiments is set so that the NSRA procedure can be performed. Thus, uplink resources may be wasted if the UE is not synchronized. Furthermore, the embodiment of Figures 10a-b has the advantage that the load on the random access channel is reduced compared to using a timer based on worst-case UE mobility to determine the synchronization state, and for a synchronized UE, There is no delay relative to prior art systems. the

In summary, the exemplary embodiments of the invention described above have the general advantage that network operations are simplified and that the network is easier to design and implement. Furthermore, NSRA signaling can be substantially reduced, resulting in better resource utilization. the

Although the invention is described in connection with an LTE system, the principles of the invention are applicable to radio communication systems in general, and thus to any system where synchronized uplink transmissions are required. the

Furthermore, the invention is described for use in cellular communication systems. It should be understood, however, that the invention is equally applicable to any system in which a user entity is mobile relative to a radio transceiver and where synchronous communication is required from the user entity to the radio transceiver. the

Claims (86)

1. one kind is used for providing method for communicating at radio communications system, described radio communications system comprises wireless set, the communication of the user subject in the described wireless set overlay area is carried by first communication link between described wireless set and the described user subject, described first communication link is uplink

It is characterized in that this method may further comprise the steps:

When the synchronous regime of described first communication link between described user subject and the described wireless set is unavailable in described wireless set, transmit a signal to described user subject;

When through after the very first time section, distribute radio transmission resources to the described user subject in described first communication link.

2. the method for claim 1 is characterized in that, this method further comprises: when through described very first time section and before described user subject is distributed described resource, send data to described user subject from described transceiver.

3. the method for claim 1 is characterized in that, this method further comprises:

Whether detection receives the response to described signal from described user subject in described very first time section, if do not obtain response in described very first time section, the described resource in so described first communication link is assigned to described user subject.

4. the method for claim 1, it is characterized in that, the length of described very first time section is set so that synchronizing process can be carried out in described user subject in described very first time section, described synchronizing process is used for described first communication link synchronously, described synchronizing process comprises the transmission from described user subject to described transceiver, and in the reception of described transceiver to described transmission.

5. the method for claim 1 is characterized in that, has when being transferred to the data of described user subject at wireless set, carries out described step.

6. the method for claim 1 is characterized in that, the described signal that sends to described user subject comprises at least a portion for the data that send to described user subject that receives.

7. the method for claim 1 is characterized in that, when determining that described first communication link quilt synchronously, sends signaling by the described Resources allocation at described first communication link, and described user subject responds the signal of described transmission.

8. the method for claim 1 is characterized in that, further comprises:

In described user subject, when receiving the signal of described transmission from wireless set, maybe may not initiate synchronizing process not synchronously synchronously if determine described first communication link between user subject and the wireless set.

9. the method for claim 1 is characterized in that, further comprises:

In described user subject, determine described synchronous regime.

10. method as claimed in claim 9 is characterized in that, described user subject is determined its synchronous regime based on the speed of estimating.

11. method as claimed in claim 9 is characterized in that, this user subject is determined its uplink synchronization state based on its current location.

12. method as claimed in claim 11 is characterized in that, the current location of described user subject is determined by navigation system.

13. method as claimed in claim 9 is characterized in that, further comprises:

When receiving the signal of described transmission from described transceiver, determine the described synchronous regime of described first communication link.

14. method as claimed in claim 7 is characterized in that, the described signaling on the described Resources allocation of first communication link comprises about at least one affirmation ACK of data reception and/or at least one denies NACK message.

15. method as claimed in claim 14 is characterized in that, based on the time that receives described signal from described wireless set, the described indication of the resource of clear and definite described ACK/NACK signaling.

16. method as claimed in claim 14 is characterized in that, user subject uses the described Resources allocation of described first communication link to be used for ul transmissions.

17. method as claimed in claim 8 is characterized in that, described synchronizing process is not for inserting the NSRA process synchronously at random.

18. method as claimed in claim 8 is characterized in that, described synchronizing process comprises:

Send signaling to described wireless set, and

Described wireless set is in response to described signaling, and described response comprises at least one synchronization parameter.

19. method as claimed in claim 18 is characterized in that, described synchronization parameter is the timing advance numerical quantity.

20. method as claimed in claim 19 is characterized in that, further comprises:

Described timing advance numerical quantity together sends with data in band, and described data are included in the header information in the protocol Data Unit identical with data.

21. method as claimed in claim 19 is characterized in that, described timing advance numerical quantity is sent out in protocol Data Unit, and this protocol Data Unit is located away from the protocol Data Unit for data.

22. method as claimed in claim 18 is characterized in that, further comprises:

Resources allocation is given the described user subject in described first communication link.

23. the method for claim 1, it is characterized in that, described radio communications system is cellular communication system, and described communication system comprises a plurality of residential quarters, each residential quarter comprise at least one wireless set be used for providing with the overlay area in the communicating by letter of at least one user subject.

24. the method for claim 1 is characterized in that, distributes a plurality of radio transmission resources to give described user subject.

25. the method for claim 1 is characterized in that, further comprises:

Data are sent to described user subject as a plurality of transmission, and wherein said user subject is in response to the described a plurality of transmission on a plurality of resources.

26. the method for claim 1 is characterized in that, described wireless set is the radio base station in the cellular communication system.

27. the method for claim 1 is characterized in that, described wireless set comprises that the Node B of the enhancing in the universal terrestrial radio access network UTRAN system that 3GPP strengthens is eNB.

28. the method for claim 1 is characterized in that, described first communication link comprises up link.

29. one kind is used for providing method for communicating at radio communications system, described radio communications system comprises wireless set, the communication of the user subject in the described wireless set overlay area is carried by first communication link between described wireless set and the described user subject, described first communication link is uplink

It is characterized in that this method may further comprise the steps:

Transmit a signal to described user subject;

Even the synchronous regime of described first communication link between described user subject and the described wireless set is unavailable in described wireless set, before the response that receives from described user subject, distribute the radio transmission resources of described first communication link to give described user subject.

30. method as claimed in claim 29 is characterized in that, described step is performed when wireless set has be used to the data that are transferred to described user subject.

31. method as claimed in claim 29 is characterized in that, the described signal that sends to described user subject comprises at least a portion for the data that send to described user subject that receives.

32. method as claimed in claim 29 is characterized in that, when determining that described first communication link quilt synchronously, described user subject sends the signal that signal responds described transmission by the described Resources allocation at described first communication link.

33. method as claimed in claim 29 is characterized in that, further comprises:

In described user subject, when receiving the signal of described transmission from wireless set, maybe may not initiate synchronizing process so not synchronously synchronously if determine described first communication link between user subject and the wireless set.

34. method as claimed in claim 29 is characterized in that, further comprises:

In described user subject, determine the described synchronous regime of described first communication link.

35. method as claimed in claim 32 is characterized in that, the described signaling on the described Resources allocation of first communication link comprises about one of the reception of described data confirms that ACK and/or one deny NACK message.

36. method as claimed in claim 35 is characterized in that, based on the time that receives described signal from described wireless set, the described indication of the resource of clear and definite described ACK/NACK signaling.

37. method as claimed in claim 35 is characterized in that user subject uses the described Resources allocation of described first communication link to be used for ul transmissions.

38. method as claimed in claim 33 is characterized in that, described synchronizing process comprises the NSRA process that do not insert at random synchronously.

39. method as claimed in claim 33 is characterized in that, described synchronizing process comprises:

Send signaling to described wireless set, and

Described wireless set is in response to described signaling, and described response comprises at least one synchronization parameter.

40. method as claimed in claim 39 is characterized in that, described synchronization parameter comprises the timing advance numerical quantity.

41. method as claimed in claim 39 is characterized in that, further comprises:

Resources allocation is given the described user subject in described first communication link.

42. method as claimed in claim 29 is characterized in that, described wireless set is the radio base station in the cellular communication system.

43. method as claimed in claim 29 is characterized in that, distributes a plurality of radio transmission resources to give described user subject.

44. method as claimed in claim 29 is characterized in that, further comprises:

Data are sent to described user subject as a plurality of transmission, and a plurality of resource is assigned to described user subject, and wherein said user subject is in response to the described a plurality of transmission on described a plurality of resources.

45. system that is used for providing at radio communications system communication, described radio communications system comprises wireless set, the communication of the user subject in the described wireless set overlay area is carried by first communication link between described wireless set and the described user subject, described first communication link is uplink

It is characterized in that this system comprises that a device is used for:

When the synchronous regime of described first communication link between described user subject and the described wireless set is unavailable in described wireless set, transmit a signal to described user subject, and

When through after the very first time section, distribute radio transmission resources to the described user subject in described first communication link.

46. system as claimed in claim 45 is characterized in that, comprises that further a device is used for:

When through described very first time section and before described user subject is distributed described resource, send data to described user subject from described transceiver.

47. system as claimed in claim 45 is characterized in that, comprises that further a device is used for:

Whether detection receives the response to described signal from described user subject in described very first time section, if and wherein in described very first time section, do not obtain response, the described resource in so described first communication link would be assigned to described user subject.

48. system as claimed in claim 45, it is characterized in that, the length of described very first time section is set so that synchronizing process can be carried out in described user subject in described very first time section, described synchronizing process is used for described first communication link synchronously, described synchronizing process comprises the transmission from described user subject to described transceiver, and in the reception of described transceiver to described transmission.

49. system as claimed in claim 45 is characterized in that, sends described signal to described user subject when wireless set has be used to the data that are transferred to described user subject.

50. system as claimed in claim 45 is characterized in that, the described signal that sends to described user subject comprises at least a portion for the data that send to described user subject that receives.

51. system as claimed in claim 45 is characterized in that, when determining that described first communication link quilt synchronously, described user subject sends the signal that signal responds described transmission by the described Resources allocation at described first communication link.

52. system as claimed in claim 45 is characterized in that, comprises that further a device is used for:

In described user subject, when receiving the signal of described transmission from wireless set, maybe may not initiate synchronizing process so not synchronously synchronously if determine described first communication link between user subject and the wireless set.

53. system as claimed in claim 45 is characterized in that, further comprises for the device of determining described synchronous regime in described user subject.

54. system as claimed in claim 53 is characterized in that, described user subject is determined its synchronous regime based on the speed of estimating.

55. system as claimed in claim 53 is characterized in that, described user subject is determined its uplink synchronization state based on its current location.

56. system as claimed in claim 55 is characterized in that, the current location of described user subject is determined by navigation system.

57. system as claimed in claim 53 is characterized in that, further comprises for when receiving described transmission from described transceiver, determines the device of the described synchronous regime of described first communication link.

58. system as claimed in claim 51 is characterized in that, the described signaling on the described Resources allocation of first communication link comprises about at least one affirmation ACK of data reception and/or at least one denies NACK message.

59. system as claimed in claim 58 is characterized in that, based on the time that receives described signal from described wireless set, the described indication of the resource of clear and definite described ACK/NACK signaling.

60. system as claimed in claim 58 is characterized in that, user subject uses the described Resources allocation of described first communication link to carry out ul transmissions.

61. system as claimed in claim 52 is characterized in that, described synchronizing process is not for inserting the NSRA process synchronously at random.

62. system as claimed in claim 52 is characterized in that, described synchronizing process comprises:

Send signaling to described wireless set, and

Described wireless set is in response to described signaling, and described response comprises at least one synchronization parameter.

63. system as claimed in claim 62 is characterized in that described synchronization parameter is the timing advance numerical quantity.

64. system as claimed in claim 62 is characterized in that, further comprises:

Resources allocation is given the described user subject in described first communication link.

65. system as claimed in claim 45, it is characterized in that, described radio communications system is cellular communication system, and described communication system comprises a plurality of residential quarters, each residential quarter comprise at least one wireless set be used for providing with the overlay area in the communicating by letter of at least one user subject.

66. system as claimed in claim 45 is characterized in that,

Distribute a plurality of radio transmission resources to give described user subject.

67. system as claimed in claim 45 is characterized in that, data are sent to described user subject as a plurality of transmission, and wherein said user subject is set in response to the described a plurality of transmission on a plurality of resources.

68. system as claimed in claim 45 is characterized in that, described wireless set is the radio base station in the cellular communication system.

69. system as claimed in claim 45 is characterized in that, described wireless set is that the Node B that the universal terrestrial radio of evolution inserts the enhancing in the E-UTRA system is eNB.

70. system that is used for providing at radio communications system communication, described radio communications system comprises wireless set, the communication of the user subject in the described wireless set overlay area is carried by first communication link between described wireless set and the described user subject, described first communication link is uplink

It is characterized in that this system comprises that a device is used for:

Transmit a signal to described user subject;

Before receiving from the response of described user subject, distribute the radio transmission resources of described first communication link to give described user subject, even the synchronous regime of described first communication link between described user subject and the described wireless set is unavailable in described wireless set.

71. as the described system of claim 70, it is characterized in that, be included in when wireless set has be used to the data that are transferred to described user subject and send described signal to the device of described user subject.

72., it is characterized in that the described signal that sends to described user subject comprises at least a portion for the data that send to described user subject that receives as the described system of claim 70.

73. as the described system of claim 70, it is characterized in that, when determining that described first communication link quilt synchronously, described user subject is set to send the signal that signal responds described transmission by the described Resources allocation at described first communication link.

74. as the described system of claim 70, it is characterized in that, comprise that further a device is used for:

In described user subject, when receiving the signal of described transmission from wireless set, if it determines that described first communication link between user subject and the wireless set synchronously maybe may be not synchronous, not initiate synchronizing process so.

75. as the described system of claim 70, it is characterized in that, further be included in the device of determining the described synchronous regime of described first communication link in the described user subject.

76., it is characterized in that the described signaling on the described Resources allocation of first communication link is set to comprise that about the reception of described data confirms that ACK and/or one deny NACK message as the described system of claim 70.

77. as the described system of claim 76, it is characterized in that, based on the time that receives described signal from described wireless set, the described indication of the resource of clear and definite described ACK/NACK signaling.

78., it is characterized in that user subject uses the described Resources allocation of described first communication link to carry out ul transmissions as the described system of claim 76.

79. as the described system of claim 74, it is characterized in that described synchronizing process is not for inserting the NSRA process synchronously at random.

80., it is characterized in that described synchronizing process comprises as the described system of claim 74:

Send signaling to described wireless set, and

Described wireless set is in response to described signaling, and described response comprises at least one synchronization parameter.

81. as the described system of claim 80, it is characterized in that described synchronization parameter is the timing advance numerical quantity.

82. as the described system of claim 80, it is characterized in that, further comprise:

Resources allocation is given the described user subject in described first communication link.

83., it is characterized in that described wireless set is the radio base station in the cellular communication system as the described system of claim 70.

84. as the described system of claim 70, it is characterized in that, distribute a plurality of radio transmission resources to give described user subject.

85. as the described system of claim 70, it is characterized in that, data are sent to described user subject as a plurality of transmission, and a plurality of resource is assigned to described user subject, and wherein said user subject is in response to the described a plurality of transmission on described a plurality of resources.

86. communication system is characterized in that, comprises as any one system among the claim 45-85.

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