Adaptive buffer status reporting

FIELD: physics, computer engineering.

SUBSTANCE: invention relates to a method of transmitting information over a network. The method comprises transmitting from a first station to a second station, wherein the first station comprises at least one buffer memory for storing data packets intended for transmission, wherein the method includes steps where (a) the first station estimates the status of at least one buffer memory, (b) the first station transmits at least one buffer status packet which is the buffer memory status, wherein the method further includes a step (c) of adapting the value of the first parameter of the buffer status packets based on data traffic characteristics.

EFFECT: buffer status reporting (BSR) providing sufficient information on the real state of buffers of the second station during high activity thereof.

13 cl, 6 dwg

 

The technical field TO WHICH the INVENTION RELATES

The present invention relates to a method for transmitting information within a communication network. More specifically, it relates to a method for transmitting information from the first station to the second station. It also refers to the radio stations that can implement this method.

This invention, for example, applies to all wireless communication networks and the following descriptions to the telecommunications network, such as UMTS or UMTS LTE.

The LEVEL of TECHNOLOGY

In a cellular network, each cell contains a primary station, such as base station or node B, or eNB, connected to multiple secondary stations such as mobile station or user equipment. To be able to send data to the primary station in some channels uplink, the secondary station usually needs to be assigned to a resource (e.g., time interval, frequency podnesku and/or code).

Many communication systems operate using a centralized scheduler, which is responsible for assigning transmission resources to different nodes. A typical example is the ascending line of communication UMTS LTE (long term development), in which the transmission of uplink from different secondary stations are planned on time and on hour�OTE by the primary station. The primary station transmits the message "the granting of planning in the secondary station indicating the specific time-frequency resource for transmission to the secondary station, typically about 3 MS after the transmission of the message delivery. A message providing also usually specifies transmission parameters such as data rate and/or power used for transmission to the secondary station.

To the primary station issued the relevant provision, it needs to have enough information about the volume and type of data awaiting transmission in the buffer of each secondary station.

Consequently, in the LTE defines several message types message buffer status (BSR), which may be transmitted from a secondary station to the primary station, when there are certain triggers. A modern version of the 3GPP TS36.321 included here as a reference.

The procedure of the message buffer status is used to provide the primary station serving the information about the amount of data in the buffers uplink secondary station. Use two types of status messages of the buffer depending on the event. Short message buffer status (BSR) contains the identification code of one group of logical channels with a 6-bit pointer of the volume data corresponding to the logical group �of anals, currently in the buffer of the secondary station in anticipation of the transfer. Long BSR contains four concatenated short BSR, and each of them corresponds to a different group of logical channels.

The problem with the BSR procedure, defined above, is that the secondary station is permitted to transmit the BSR, only if it has provided a resource that can be transferred. If new data arrives in the buffer of the secondary station and the secondary station has not provided resource, in which you can transmit data or send BSR to indicate that it has data waiting for transmission, the secondary station must either wait until then, until it adopts the provision, or transfer a simplified version of the BSR, which can be transmitted using some specially assigned resources that can be used without particular given resource. This simplified version of BSR known as "the scheduling request (SR) and usually contains only one bit to indicate that the data is in the buffer. It is also known that SR contains many small bits that give more functionality. In response to the reception of the SR the primary station can either transmit the provision that assigns the appropriate amount of resource transfer to the secondary station, and then to send BR or transfer the provision that assigns a higher volume of resource transfer, which would allow the secondary stations to transmit some data in addition to BSR, but in the latter case, to the primary station usually has no means to determine the appropriate destination to do his, if SR does not contain more than one bit.

As a result of known implementations to inform the primary station on the status of the buffer of the secondary station does not provide adequate amount of information. Indeed, in cases of low activity secondary station BSR transmitted regularly, are more than sufficient and do not use resources in an efficient way. Conversely, in the case of high activity secondary station, BSR may not give sufficient information about the real state of the buffer of the secondary station.

Disclosure of the INVENTION

The object of the invention is to provide an improved method for transmission of information (i.e., communication) in the network, which reduces the above problems.

Another object of the invention is to provide a method for transmitting the status of the buffer of the mobile station effective way, making effective use of resources.

Another object of the invention is to provide a method for signaling the status of the buffet�tions memories way adapted to the situation in the secondary station.

In accordance with the first aspect of the invention proposes a method of information transmission in the network from the first station to the second station, the first station comprises at least one buffer memory for saving the data packets intended for transmission, the method contains the stages at which

(a) the first station evaluates the status of the at least one buffer memory,

(b) the first station transmits at least one packet buffer status representing a status of the buffer memory, the method further comprises step (C), which adapt the value of the first parameter of the packet buffer status based on the characteristics of the data traffic.

In illustrative embodiments, the first station is a secondary station (or user equipment or mobile station) and the second station is the primary station (or eNodeB, base station).

In accordance with another aspect of the invention provides a radio station containing means for communicating on the network with at least an additional station, the first station further comprises at least one buffer memory for saving data packets for the transmission, a means of buffer management to assess the status of at least one�th buffer memory, a transmission medium for transmitting at least one packet buffer status representing a status of the buffer memory, and a means of controlling the buffer is arranged to adjust the value of the first parameter of the packet buffer status based on the characteristics of the data traffic.

Thanks to these attributes, a radio station, such as secondary station can adapt the amount of information transmitted to the second station, such as primary station, depending on the situation in the secondary station, or total employment network. Thus, it allows to use effectively the resources provided in the secondary station for signalling the status of the buffer memory.

In addition, it should be noted that in the embodiment of the invention, in which secondary stations transmit information in multiple logical channels, a buffer memory may comprise a plurality of buffers of logical channels whose status signal independently one by one, and that step (C) adaptation can be performed in one or more messages of the status of the logical channel. Thus, the message status of the logical channel allocated to a logical channel with low activity, may be less often or with low accuracy so that the messages of the status of the logical channel allocated to logicism�channel with high activity, may be signaled more often or with higher accuracy (e.g., encoded in more bits).

These and other aspects of the invention will become apparent from embodiments described later in the present application, and will be explained with reference to options for implementation, described later in this application.

BRIEF description of the DRAWINGS

The present invention will be further described in more detail as an example with reference to the accompanying drawings, in which:

Fig.1 is a block diagram of a network implementing the invention.

Fig.2A and Fig.2B is a timing diagram depicting the adaptation of signaling, in accordance with the first variant implementation.

Fig.3A, Fig.3B and Fig.3C is a timing diagram depicting a variant of the first variant implementation.

The IMPLEMENTATION of the INVENTION

The present invention relates to a communication network having a primary station and multiple secondary stations performing communication with a primary station. Such a network is illustrated in Fig.1.

Referring to Fig.1, a radio communications system in accordance with the invention comprises a primary station (BS) 100 and a variety of secondary stations (MS) 110. The primary station 100 includes a microcontroller (ás) 102, a vehicle 104 transceiver (Tx/Rx), coupled with the means 106 of the antenna, the means 107 power management�computer (PC) to change the level of the transmitted power and the means 108 for connection for connection to the PSTN or other suitable network. Each secondary station 110 contains a microcontroller (ás) 112, the tool 114 of the transceiver (Tx/Rx), coupled with the means 116 of the antenna, and means 118 power control (PC) to change the transmitted power level. Transmission of information from a primary station 100 to the mobile station 110 in the channel downlink, while the transmission of information from a secondary station 110 to the primary station 100 takes place in the channel of the uplink.

In wireless packet data networks with centralized controller, such as the network of Fig.1, requires a mechanism to enable the primary station 100 (or eNB in the terminology of UMTS LTE) effectively assign priorities for allocating resources of transmission uplink between different secondary stations 110 (user equipment or UE in UMTS LTE). Each secondary station usually has data queued in the buffer until they can be transferred, this may be buffers for a number of different flows or logical channels (LC), each with different quality of service (QoS). Primary station needs information to enable it to decide which secondary station should be given the right to transmit and at what rate. To help in this process and reduce overhead races�odes, can be grouped in LC group LC (LCG) and transmit an indication of buffered data for different LCG (namely, the message buffer status, BSR).

As explained above, in systems such as UMTS LTE, a certain number of bits assigned in the BSR, is usually pre-defined and equal for all LCG. In addition, often make the exact knowledge of the status of the buffer in the primary station 100, in other words, when the primary station has a very precise quantitative knowledge of the number of bytes in the buffer of the secondary station. Some modelling indicates that it may be more beneficial to send rude status updates of the buffer, the more detailed message, optionally separated by gaps, especially for features in real time. As a result, a fixed length of the message buffer status (BSR) that is assigned to give an accurate knowledge of the status of the buffer has the following disadvantages:

1. It brings a significant overhead costs that cannot be justified in light of the fact that in some cases the same or similar performance can be achieved with a smaller number of bits assigned in the BSR.

2. It makes it difficult to load the BSR for many LCG back to the primary station in the cases where it is available only part of the full number of bits required, in such cases, modern� system would provide only full BSR for LCG highest priority (an Example of such a case occurs, when the amount of data that can be transferred is smaller than the granted transmission resources, resulting in the need some padding to fill out the resources provided, and in such a case, some or all of fill bits can be replaced by the alarm BSR, but a certain number of bits of padding that are available for replacement, may be insufficient for full BSR transmitted to all LCG).

The invention is based on the realization that the BSR should be adapted to the situation of data traffic throughout the network, a specific secondary station and/or the logical channel group corresponding to the BSR. In accordance with the first embodiment of the invention proposed solution is to allow configurable rudeness and/or frequency of BSR. As a result, in accordance with the first embodiment of the invention it consists of Queuing data units in the buffer of the secondary station to assess the level of rudeness BSR appropriate for your specific scenario, or in the secondary station, either in the primary station, and then adapt coarseness alarm BSR in accordance with the assessment. An example of this embodiment illustrated in Fig.2A. In accordance with this example, the secondary station on the first stage 200 of work sends one BSR 201, is allocated to at least one service� logical channel regularly. After evaluation of the characteristics of the data traffic that encourage secondary station to enter a second phase, such as more stringent QoS requirement for that logical channel or higher activity, the secondary station transmits the BSR 301 with greater precision, for example with a large number of bits. As a result, in a given time the amount of data transferred is allocated by this logical channel is higher at the second stage 300 than in the first stage 200. Thus, the BSR will adapt in time.

In accordance with an embodiment of the first variant implementation is illustrated in Fig.2B, BSR at the second stage 300 is passed more often than BSR 202 of the first stage 200. The size of the BSR should not be changed. As a result, as in the first example, Fig.2B, during the time the amount of data transferred is allocated in this way logical channel is higher at the second stage 300 than in the first stage 200. Thus, the BSR will adapt in time.

It should be noted that these two examples can be combined, for example, when BSR send more often and, for example, with a lower accuracy.

In accordance with the first variant of implementation, the entrance to the second stage is performed after the evaluation of the specific characteristics of the traffic profiles. Possible options include:

and. The intensity of traffic, which can be defined by the average number of new� revenues of the system;

b. The QoS requirement of the entire system, such as the total number of satisfied users;

C. Type of traffic (e.g., VoIP or video, or file transfer);

d. The amount of buffered data for one or more traffic flows.

This evaluation can be performed by the primary station 100 and may be performed for each logical channel group. Then, the primary station may transmit the value of the evaluated characteristics, and the secondary station to infer values about acceptable rudeness BSR (by adapting the frequency or accuracy of the BSR) or even rudeness BSR, clearly signaled for each LCG. This value can be different for different LCG.

Before explicit signaling rudeness BSR separately for each LCG grouping in LC LCG can be performed by the network (for example, on the basis of the similarity between the BSR levels sufficient for satisfactory performance). In an embodiment of this invention, the roughness of the BSR is estimated based on the number of available bits fill or given actual the used scheduling algorithm.

In a second embodiment of the invention can be created table satisfactory levels of coarseness BSR for a given QoS and range of variation of traffic loads for VoIP traffic. Depending on the actual volume of traffic in the system, known primary station with secondary�ance can then actively adapt coarseness BSR based on the information about the traffic load of the primary station.

Another example is the case of padding BSR in UMTS Rel-8 LTE. If you have more than one LCG with buffered data and there are not enough bits to send long BSR, the mechanism in accordance with the invention, which specifies which LCG their BSR will be sent, not just the LCG with the highest priority. This decision can be based on the following:

1. Priorities: choose 2, 3 or 4 LCG, which have the highest priority, not just a LCG with the highest priority;

2. Fill buffer level: in addition to the priorities can be introduced thresholds that, when exceeded, indicate that the LCG has the right to put your BSR, or indicate adaptation granularity BSR;

3. The delay of the start of the queue (i.e., the time duration during which the highest package was in the buffer).

In addition, the following are suggested formats that give the possibility to combine 2, 3 and 4 rough in BSR octet. The transmitted BSR format could be specified by LCID values, such as in the first version of LTE. New LCID value should be reserved for these three formats in Fig.3A - Fig.3C.

Fig.3A, if LCG signaled to the primary station in a single BSR, in this case, similarly to the long BSR is not necessary to specify ID LCG provided that the relevant BSR are given in the correct sequence�scenic spots (since only 4 LCG defined in LTE, in the General case, this format is applied to the transmission of the BSR information for all configured LCG). In a variant implementation, in which 8 bits are available, this means that there are 2 bits for each of the 4 LCG, as shown in Fig.3A.

Fig.3B, if the 3 LCG signaled to the primary station in a single BSR, if I had to send 3 2-bit ID, LTE for only 8-6=2 bits for the three BSR. Below is the proposed alternative, which reports the LCG ID, BSR which don't need to inform (in this case, LCG #2), followed by 3 2-bit BSR in the correct sequence.

Fig.3C only 2 LCG are signaled in one BSR, and ID two groups of logical channels are flagged with the value of the buffer status of this LCG. For 8-bit BSR 2 bits are used for ID, and two bits are used for the value of the buffer status of this LCG.

In another embodiment, the implementation of the long BSR is adjusted in accordance with the traffic class. For example, the secondary station could transmit a long BSR for LCG containing at least one stream of data with multilevel criterion of satisfaction (for example, FTP download, where the degree of user satisfaction generally increases with decreasing transmission delay), while the secondary station could transmit a shorter BSR for LCG containing only the data streams with the criterion of satisfaction double�CSO status (for example, VoIP service, where the user usually either satisfied or not depending on a specific ratio of successfully delivered packets during a fixed period of time).

Another variant implementation is a case in which pre-configures the frequency at which to send the BSR. The secondary station could in this case to adjust the length BSR to achieve the required QoS, depending on how the pre-configured frequency.

In the cases where the assessment of suitable length BSR perform in the base station, the base station then signals the result of the evaluation in the UE. In a typical embodiment of the UE is thus able to take a list of logical channels, logical groups of channels or priorities with the corresponding length of the associated BSR for each of them.

In an embodiment of the invention, the primary station is a mobile terminal such as user equipment and the secondary station is a base station, such as eNodeB.

The invention can be applied to mobile telecommunication systems such as UMTS, LTE and advanced UMTS LTE, and in some embodiments to any communication system having a resource assignment performed dynamically or at least periodically.

In the present description and the claims, the indicating element in the only�Ennom not preclude the presence of many such elements. In addition, the word "contains" does not exclude other elements or steps other than those listed items and stages.

It is understood that the inclusion of a reference position in parentheses in the claims shall promote understanding, but not be regarded as limiting.

On the basis of the present disclosure skilled in the art will be apparent other modifications. Such modifications may involve other features which already known in the technical field of radio communications.

1. The method of information transmission in the network from the first station to the second station, the first station comprises at least one buffer memory for saving the data packets intended for transmission, the method contains the stages at which:
(a) the first station evaluates the status of the at least one buffer memory,
(b) the first station transmits at least one packet buffer status representing a status of the buffer memory, the method further comprises step (C), where the first station outputs the value of the first parameter of the packet buffer status based on the characteristics of the data traffic, wherein the first parameter comprises at least one of the following: the amount of information transmitted through the packet buffer status in a given time, the packet size status Boothe�RA and the degree of detail of information included in the packages buffer status.

2. A method according to claim 1, wherein the first parameter of step (C) contains the frequency of packet transmission buffer status.

3. A method according to claim 1, wherein the characteristic of the data traffic is evaluated through a second station, the method further comprises a step in which the second station signals characteristic of the data traffic in the first station and in which at the stage (C) the first station adapts the value of the first parameter of the packet buffer status based on the signaled traffic characteristic of the data.

4. A method according to claim 1, wherein the characteristic of the data traffic is evaluated through a second station, the method further comprises a step in which the second station signals at the first station the second parameter of the packet buffer status intended for use by the first station in step (C).

5. A method according to claim 4, wherein step (C) comprises a step in which the first station receives a second parameter, wherein the first station further adjusts the first parameter of the packet buffer status based on the received value of the second parameter.

6. A method according to claim 5, in which the first parameter of the packet buffer status is the same as the second parameter.

7. A method according to any one of claims. 1-6, in which the buffer memory contains many oferowalismy channels with each logical channel buffer adapted to save the data packets are allocated to the respective logical channel or group of logical channels, wherein the packet buffer status contain at least one portion allocated to the information relating to the status of the corresponding buffer of the logical channel, and in which in step (C) for each part of the first parameter will adapt depending on the logical channel or group of logical channels, which is considered part.

8. A method according to claim 7, additionally containing a stage at which logical channels are grouped into a group of logical channels depending on whether they have the value of the first parameter of the packet buffer status, which is essentially the same.

9. A method according to claim 8, in which step (C) further comprises a stage on which choose a subset of the logical buffers of the channels and transmit the packet buffer status indicating the status of the selected buffer of the logical channel.

10. A method according to claim 9, in which the size mentioned subset is signaled by the second station.

11. A method according to claim 9, in which the buffer of the logical channel is chosen on the basis of at least one of the following: the priority of the logical channel, the delay of the beginning of the queue fill levels of buffer of the logical channel or the number of bits Zap�assign, available in the data package.

12. A method according to any one of claims. 1-6, in which the characteristic traffic data includes at least one of the following characteristics: the intensity of traffic, the requirement of QoS (quality of service), total number of satisfied users, type of traffic, the amount of buffered data for one or more traffic flows or logical channels, the status of the buffer memory, the number of bits of padding that are available in the data package.

13. Radio station containing means for communication network with at least an additional station, the radio station further comprises at least one buffer memory for saving data packets for the transmission, a means of buffer management to assess the status of at least one buffer memory, the transmission medium for transmitting at least one packet buffer status representing a status of the buffer memory, wherein the management tool buffer configured to output the first setting of the packet buffer status based on the characteristics of the data traffic, wherein the first parameter comprises at least one of the following: the amount of information transmitted through the packet buffer status in a given time, the size of the packet buffer status and the degree of detail contained in the package�x buffer status.



 

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2 cl, 5 dwg

FIELD: engineering of technical means for complex protection of information during its storage and transfer.

SUBSTANCE: method for complex information protection is realized in following order: prior to transfer into communication channel or prior to recording into memory, state of used communication channel or information storage environment is analyzed, from M possible codes parameters of optimal (n,k) code for current status of channel or information storage end are determined, information subject to protection is split on q-nary symbols l bits long (q=2l) for each q-nary system gamma combinations l bits long are formed independently from information source, for each set of k informational q-nary symbols (n-k) excessive q-nary symbols are formed in accordance to rules of source binary (n,k) code, each q-nary symbol is subjected to encrypting stochastic transformation with participation of gamma, after receipt from communication channel or after reading from memory for each q-nary symbol combination of gamma with length l is generated, synchronously with transferring side, reverse stochastic decrypting transformation is performed for each q-nary symbol with participation of gamma, by means of checking expressions of source binary code localized are correctly read from memory or received q-nary symbols, untrustworthily localized symbols are deleted, integrity of message is restored by correcting non-localized and erased q-nary symbols of each block, expressing their values through values of trustworthily localized or already corrected q-nary symbols, if trustworthy restoration of integrity of code block is impossible it is deleted, number of deleted blocks is counted, optimality is determined within observation interval of used code with correction of errors for current state of channel, if code optimum criterion exceeds given minimal and maximal limits, code is replaced with optimal code synchronously at transferring and receiving parts of channel in accordance to maximum transfer speed criterion.

EFFECT: efficiency of each protection type and increased quality of maintenance of guaranteed characteristics of informational system.

18 cl

FIELD: transmitting messages with broadcast servicing parameters in wireless communication system supporting broadcast service.

SUBSTANCE: one of methods involves identification of service option number corresponding to set of broadcast transmission parameters. As an alternative, message identifies bit block corresponding to broadcast transmission parameters. Message can be transferred over service information transmission channel. Message for system supporting broadcast service identifies protocol stack for processing broadcast service and also identifies protocol stack for processing broadcast content.

EFFECT: enhanced efficiency and precision of data transfer and specific service rendering.

12 cl, 24 dwg

FIELD: data transmission in computer networks.

SUBSTANCE: in accordance to the invention, expandable, usable with various client-server informational systems, system of dynamically created program objects is used, wherein program objects are divided onto a fixed number of categories, which are matched with predetermined program interfaces, where creation of request to server and processing of response from server represent predetermined chains of program object method calls.

EFFECT: reduced load on communication line in client-server system.

2 cl, 6 dwg

FIELD: communications engineering, in particular, systems for controlling information exchange process in communication networks of industrial enterprises, in-plant networks and field communication units.

SUBSTANCE: system for controlling passage of documental information contains station for managing system for controlling information passage with operative-dispatching equipment, data transmission lines and phone communication connecting lines, station for controlling passage of documental information based on duty workplace for controlling passage of documental information and workplaces of two dispatchers, where each one of aforementioned workplaces is equipped with personal computer, containing system block, monitor, standard keyboard, "mouse" type graphical manipulator, printer and interface expander, block of adapters, block for connecting and distributing communication lines, client and connecting lines of service communications, service communications equipment, consisting of line commutation block and three control panels, one for each of aforementioned workplaces for controlling passage of documental information and of first and second dispatchers, n client stations for transferring documental information, each one of which contains group equipment block, four telegrapher panels and four end talking panels, data transmission lines and client phone communication lines, connected in a certain way.

EFFECT: increased trustworthiness of control over passage of documental information and increased quality of services, provided to consumers of aforementioned information.

2 cl, 2 dwg

FIELD: multi-layered content delivery.

SUBSTANCE: in accordance to the invention the network contains a content release layer, content delivery layer with at least one level of delivery sub-layer and a layer of boundary servicing, where the service release layer contains at least one node of Internet service provider (ICP), and is connected to first level delivery sub-layer in the content delivery layer, each delivery sub-layer contains at least one delivery unit, and the delivery sub-layer of the lowest level is connected to boundary service layer, the boundary service layer contains at least one boundary service area, and content, which is subject to release in a content release layer, is distributed through delivery node of first level delivery sub-layer, which is connected to content release layer, and further downwards level after level until the boundary service layer is reached.

EFFECT: distributed provision of services, optimized dispatching mode and local balancing of servicing load.

2 cl, 6 dwg

FIELD: mobile communications.

SUBSTANCE: each time when it is necessary to output information on available mobile telecommunication networks, it is required to determine if output of information on available mobile telecommunication networks is allowed on the basis of the number of information transmissions performed within certain period of time. If the transmission is allowed, information on available mobile telecommunication networks is transmitted and number of performed transmissions is registered; otherwise information transmission is stopped. When value of the period for decision making is changed, the record of transmission number is updated. If after stop of information transmission a request is received for information output, this request is left without answer or the information is transmitted after delay.

EFFECT: protection of Wireless Local Area Network (WLAN) against frequent interaction operations of network selection.

19 cl, 8 dwg

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