HK1068471A - Dynamic link adaption for time division duplex (tdd) - Google Patents

Description

Dynamic link adaptation for time division duplex

Technical Field

The present invention relates to the field of wireless communications. More particularly, the present invention relates to a Time Division Duplex (TDD) communication system that uses dynamic link adaptation for transmissions between a User Equipment (UE) and a Base Station (BS) to make adjustments that change propagation conditions.

Background

Third generation (3G) mobile communication systems are capable of transmitting a wide range of services, including high data rate services (such as video and internet downloads) and low data rate services (such as voice). Referring to fig. 1, a plurality of user services are shown as individual data streams. The individual data streams are assigned to transport channels A, B, C to enable the data streams to be encoded and multiplexed. Each transport channel A, B, C is assigned a particular code rate and a particular Transmission Time Interval (TTI). The coding rate determines the number of physical layer transport bits and the Transmission Time Interval (TTI) defines the transmission time of the data block to be transmitted. This Transmission Time Interval (TTI) may be 10, 20, 40, or 80ms, for example.

Multiple transport channels A, B, C are a combined multiplexed onto a coded composite transport channel (CCTrCH). Since the coded composite transport channel (CCTrCH) is combined by multiple transport channels A, B, C, the coded composite transport channel (CCTrCH) will have multiple different coding rates and different Transmission Time Intervals (TTIs).

For example, transport channel a may have a 20ms Transmission Time Interval (TTI) and transport channel B may have a 40ms Transmission Time Interval (TTI). Thus, the formatting of transport channel a in the first 20ms and the formatting of transport channel a in the second 20ms may change. In contrast, since transport channel B has a 40ms Transmission Time Interval (TTI), the formatting (i.e., the number of bits) for each 20ms period is identical during the 40ms TTI. It is important to note that the transport channels A, B, C each utilize the minimum Transmission Time Interval (TTI) of the coded composite transport channel (CCTrCH) to map to the coded composite transport channel (CCTrCH) on a Transmission Time Interval (TTI) basis. The transmit power is based on the transport format combination applied in the minimum Transmission Time Interval (TTI) of the coded composite transport channel (CCTrCH) for the final decision.

Additionally, those skilled in the art will note that each respective data stream will have an associated data rate and each physical channel will have an associated data rate. Although these data rates may be related to each other, these data rates are indeed different data rates.

Once the minimum Transmission Time Interval (TTI) of the coded composite transport channel (CCTrCH) is established, the present invention must determine: how many bits of data will be transmitted, and which transport channels will be supported in a given Transmission Time Interval (TTI). This step is determined by the formatting of the data.

A Transport Format Combination (TFC) is applied to each coded composite transport channel (CCTrCH) based on a minimum Transmission Time Interval (TTI). Basically, this step is to assign for each transport channel: how many bits of data will be transmitted in a given Transmission Time Interval (TTI) and what transport channels will be incorporated in this Transmission Time Interval (TTI).

One set of Transport Format Combinations (TFCs) is a set of all possible Transport Format Combinations (TFCs). In case the propagation conditions do not enable the User Equipment (UE) to support all possible Transport Format Combinations (TFCs) within the set of Transport Format Combinations (TFCs), the invention has to generate a reduced set of Transport Format Combinations (TFCs) to include all Transport Format Combinations (TFCs) that the User Equipment (UE) is capable of supporting. This reduced set is referred to as a Transport Format Combination (TFC) subset. The Transport Format Combination (TFC) is selected by a process for determining which data and how much data of each transport channel A, B, C will be mapped to the coded composite transport channel (CCTrCH). A transport format combination pointer (TFCI) is a pointer to a particular Transport Format Combination (TFC) and is transmitted to the receiver to inform the receiver: those transport channels are currently active. Upon receipt of these Transport Format Combination Indicators (TFCIs), the receiver can interpret: which physical channels and which time slots have been used. Thus, the Transport Format Combination Indicator (TFCI) provides a coordinated means between the transmitter and the receiver to enable the receiver to know: which physical transport channels have already been used.

In Time Division Duplex (TDD), the User Equipment (UE) typically calculates the required transmit power based on a signal-to-interference ratio (SIR) target received by the base station. Knowing the selected Transport Format Combination (TFC), the User Equipment (UE) can calculate the required transmission power. If the Radio Frequency (RF) propagation conditions are optimized, the present invention selects a Transport Format Combination (TFC) that enables the maximum number of bits to be transmitted in each slot. However, when Radio Frequency (RF) propagation conditions deteriorate and the User Equipment (UE) calculates a higher power than the maximum allowable power that the User Equipment (UE) needs to transmit all the desired information, the present invention requires that a different set of Transport Format Combinations (TFCs) be selected that can be supported by the maximum allowable power of the User Equipment (UE). Finally, this step can reduce the amount of data that needs to be supported by the physical layer and can also reduce the power requirements needed.

In general, the system is based on a Transmission Time Interval (TTI) basis to select: what will be active in each time slot are those transmission channels, and how much data will be transmitted. The selection procedure for this Transport Format Combination (TFC) is to take into account physical transmission difficulties, (the case of one maximum allowable power) and to reduce the physical transmission requirements during a specific period.

After the multiple transport channels A, B, C are combined into a single coded composite transport channel (CCTrCH), the coded composite transport channel (CCTrCH) is then segmented and the segments are mapped individually to multiple physical channels. In a Time Division Duplex (TDD) communication system, the physical channels may exist in one or more different time slots, and different codes may also be applied in each time slot. Although there are only sixteen possible codes in a slot of the downlink, the present invention typically has eight codes in a downlink of a particular slot (for example). In uplink, there are rarely more than two codes in a particular time slot. In any event, the present invention will have a plurality of physical channels defined by a plurality of codes in a plurality of time slots, respectively. Also, the number of physical channels may vary.

In Time Division Duplex (TDD) mode of Universal Mobile Telecommunications System (UMTS), the coded composite transport channel (CCTrCH) sequentially specifies the timeslots and codes for mapping to the physical channels. For example, the first slot is selected for mapping. First, the first code of the first slot is assigned, and then the remaining codes of the first slot are assigned sequentially until after the last code assignment is completed. Once all the codes of the first slot have been assigned, the second slot is entered. This mapping procedure is repeated in the order of the codes in the second slot until all codes are assigned.

Under the architecture of the Universal Mobile Telecommunications System (UMTS), this mapping procedure for a particular User Equipment (UE) is shown in the example of fig. 2A, which has twelve slots (S1-S12), eight codes in each slot (0-7), and twelve overall codes to be set/configured (a 1-a 12). For the purposes of this description, these codes and time slots, denoted "shaded", are considered: it cannot be set to the current User Equipment (UE) because the codes and slots are already set to other User Equipments (UEs). The settable portions of the slots S4 through S7 are sequentially designated from the time slot S4, and the codes 0 through 4 in the respective slots are also sequentially designated. Suppose that: twelve codes would be mapped in this manner, and the result would be a mapping as shown in FIG. 2A, where code A1 is assigned first and code A12 is assigned last.

Although the conventional technique procedure shown in fig. 2A provides an option to map the coded composite transport channel (CCTrCH) data to the physical channels, it suffers from certain drawbacks if transmission problems are encountered in a single timeslot (e.g., when the desired transmission power exceeds the maximum allowable User Equipment (UE) power). In the Time Division Duplex (TDD) standard of the Universal Mobile Telecommunications System (UMTS), the procedure for sequentially assigning timeslots and codes to map the coded composite transport channel (CCTrCH) to the physical channels exaggerates a transmission problem when it occurs. By way of introduction, since the time slots are allocated/configured in a sequential manner when a transmission problem occurs, the transmission problem typically occurs in the previous time slot or slots. When the system detects a problem (e.g., when the desired transmit power exceeds the maximum allowable User Equipment (UE) power for a particular Transmission Time Interval (TTI)), the system typically selects a new Transport Format Combination (TFC) that will reduce the data requirements for all timeslots. Since the Time Division Duplex (TDD) standard of the Universal Mobile Telecommunications System (UMTS) specifies time slots in sequence, if the transmission problem is one of the first few time slots, the system will still encapsulate data in the previous time slot (the time slot in which the problem occurred) and leave the last few time slots (the time slots in which there was no transmission problem) relatively empty.

Thus, the problem is exacerbated by the system, since the data rate requirements in the slots without a problem are reduced and the slots with a problem are still encapsulated with data. This method is an inefficient use of radio resources.

Disclosure of Invention

The present invention is a Time Division Duplex (TDD) User Equipment (UE) that utilizes join or change control data to inform the receiver: currently active are those time slots and codes, and those time slots that should be avoided, to achieve the desired dynamic link adaptation. Thus, the User Equipment (UE) may provide synchronization functions to enable the receiver to know which timeslots and codes the User Equipment (UE) has used to map the coded composite transport channels (CCTrCH) onto physical channels. The User Equipment (UE) is trying to avoid those time slots that experience transmission difficulties and at the same time trying to apply those time slots that do not attempt to experience transmission difficulties.

Drawings

Fig. 1 is a block diagram of individual data streams combined in one physical channel.

Fig. 2A is a result of a conventional technique encoding a mapping procedure.

Fig. 2B is a prior art burst of data.

Fig. 3A is a data burst structure with a control field in data field one according to the first embodiment.

FIG. 3B is a block diagram of a burst structure with a control field in the data field two according to the first embodiment.

Fig. 3C is a data burst structure of the first embodiment, which has a control field located in the middle field.

FIG. 3D is a diagram of a burst structure of a first embodiment, which has a control field in both fields.

Fig. 3E is an example of the time slot allocation/architecture in the first embodiment.

Fig. 4A is a data burst structure with an adjusted first TFCI field according to a second embodiment.

Fig. 4B is a data burst structure with an adjusted second Transport Format Combination Indicator (TFCI) field according to a second embodiment.

Fig. 4C is a data burst structure with two Transport Format Combination Indicator (TFCI) fields adjusted simultaneously according to a second embodiment.

Fig. 4D is an example of a time slot allocation/architecture in the second embodiment.

FIG. 5A is a data burst structure with a coded bit pattern in the first data field according to a third embodiment.

FIG. 5B shows a burst structure of a third embodiment, which has a coded bit pattern in the data field two.

FIG. 5C is a data burst structure with a coded bit pattern in the middle field according to a third embodiment.

Fig. 5D is a data burst structure without Transport Format Combination Indicator (TFCI) of the third embodiment with a coded bit pattern in data field one.

Fig. 5E shows a burst structure without Transport Format Combination Indicator (TFCI) for the third embodiment with a coded bit pattern in data field two.

Fig. 5F shows a burst structure without Transport Format Combination Indicator (TFCI) with a coded bit pattern in the middle field according to the third embodiment.

Fig. 5G is an example of time slot allocation/configuration in the third embodiment.

Fig. 6A is a data burst structure with an interference information field in data field one according to a fourth embodiment.

Fig. 6B is a data burst structure with an interference information field in data field two according to a fourth embodiment.

Fig. 6C is a data burst structure with an interference information field in the middle field according to the fourth embodiment.

Fig. 6D is an example of time slot allocation/configuration in the fourth embodiment.

Fig. 7A is a data burst structure of the fifth embodiment.

Fig. 7B is an example of time slot allocation/configuration in the fifth embodiment.

Fig. 8A is a data burst structure of the sixth embodiment.

Fig. 8B is an example of time slot allocation/configuration in the sixth embodiment.

Fig. 8C is an example of time slot allocation/configuration in an alternative fifth embodiment.

Detailed Description

The invention will be described in detail with reference to the drawings, wherein like reference numerals are used to refer to like elements throughout.

Referring to fig. 2B, a conventional burst is shown. The burst of data includes two data fields separated by an intermediate field, and the intermediate field is further followed by a Guard Period (GP). The Transport Format Combination Indicator (TFCI) is transmitted in one or both data fields of the burst. The number of Transport Format Combination Indicator (TFCI) bits that are encoded depends on the number of Transport Format Combinations (TFCs) that may be supported. Since the Transport Format Combination Indicator (TFCI) is transmitted within the data fields, the number of user data bits can be reduced by transmitting the individual bits of the Transport Format Combination Indicator (TFCI). Therefore, the present invention can limit the number of Transport Format Combination Indicator (TFCI) bits.

The Transport Format Combination Indicator (TFCI) position adjacent to the middle field is the best possible transmission because the interference from the middle field can be removed and the channel prediction is also very reliable for the bits adjacent to the middle field. Those skilled in the art will appreciate that these data fields also include both user data and physical control fields, although these fields are not described further below.

The present invention includes six different embodiments to perform mobile dynamic link adaptation. The first embodiment, as shown in fig. 3A to 3E, includes: a new control field is added to the burst to indicate which specific timeslots are active and which should be avoided. For example, as shown in FIG. 3A, a control field may be added to the data field one. Fig. 3B shows the addition of this control field to data field two. Alternatively, FIG. 3C shows the control field element as part of the intermediate field. FIG. 3D shows the control field being added to both data field one and data field two. Although the control field(s) are shown as being added to a particular location within the data fields, the control field(s) may be placed in virtually any portion of the data field elements.

In any of the alternative embodiments shown in fig. 3A-3D, it is noted that the control field is used to identify the time slots in which the receiver should look for the correct data. The data in this control field may include: the "active" time slot (which has the correct data) may include: "inactive" time slots (which have incorrect data and should be avoided) may also include both: active time slots and inactive time slots. The active or inactive time slots may be individually identified, or the identifier may comprise a bit string in which a "1" indicates an active time slot and a "0" indicates an inactive time slot. It should be noted that the control field element may include a separately delineated control field or may fall only a portion of the data fields.

Referring to fig. 3E, a time slot allocation/configuration using the method of the first embodiment is shown. In this example, assume that: the control fields shown in fig. 3A to 3D represent: the slots S4, S6, and S7 are active and the slot S5 is inactive. Therefore, the slots S5 should be avoided from being unused, and the encodings a1 to a12 are allocated/configured in the slots S4, S6, and S7. This approach enables the system to avoid the occurrence of a "conflicting" time slot, such as: time slot S5 (in this example) will not be able to accurately support a communication activity without substantially increasing the User Equipment (UE) power output.

Please refer to fig. 4A to 4D, which illustrate a second embodiment of the present invention. In this embodiment, one or both of the Transport Format Combination Indicator (TFCI) fields are extended and/or adjusted to have additional data to indicate: those time slots are active and those time slots are inactive. Fig. 4A shows the first TFCI extended and/or adjusted to include the extra data; fig. 4B shows the second Transport Format Combination Indicator (TFCI) extended and/or adjusted to include the extra data; and figure 4C shows both transport format combination pointers (TFCIs), which are extended and/or adjusted to include this additional data.

Referring to fig. 4D, a time slot allocation/configuration using the method of the second embodiment is shown. In this example, assume that: the control fields shown in fig. 4A to 4C represent: the slot S6 is inactive and the slots S4, S5, S7 are active. Thus, the allocation/configuration of the codes should avoid the time slot S6 and the time slots S4, S5, S7 should also be allocated/configured with the codes in order. That is: the slot S4 is filled first, followed by slots S5 and S7 in sequence.

Please refer to fig. 5A to 5F, which illustrate a third embodiment of the present invention. In this embodiment, a particular coded bit pattern is added to one or both data fields in the burst, or to an intermediate field in the burst, for example: FIG. 5A shows addition to data field one, FIG. 5B shows addition to data field two, and FIG. 5C shows addition to the middle field. By including the particular coding mode in the burst, the transmitter can indicate: these time slots are inactive time slots (i.e., time slots to be avoided). When the receiver detects the particular bit pattern in the data burst, the message associated with the slot is discarded or ignored.

Fig. 5D-5F are similar to fig. 5A-5C except that the data burst does not include the Transport Format Combination Indicators (TFCIs). As shown in FIG. 5D, this coded bit pattern may be included anywhere in data field one. Alternatively, as shown in fig. 5E, the coded bit pattern may be included in the data field two. Alternatively, as shown in FIG. 5F, the coded bit pattern may be included in the middle field. Although the encoded bit pattern of bits in either data field one or data field two can preferably be located adjacent to this intermediate field, this is not a requirement of this or other embodiments. The coded bit pattern may be minimized as shown in fig. 5A-5D and 5F, or may include most or all of the data fields shown in fig. 5E.

The length of the bit pattern must be such that the present embodiment can use a high gain coding method and such that the bit pattern can be received in its entirety with reduced power. Thus, for example, if a twenty-five-six chip sequence is used, these power requirements would need to be reduced by twelve decibels with respect to a spreading factor of sixteen. In an alternative embodiment, a synchronization-like (Golay) sequence that does not require channel prediction may be used.

Fig. 5G is a diagram showing time slot allocation/configuration using the method of the third embodiment. In this example, assume that: the data burst shown in FIG. 5F is representative of: time slot S6 has been designated as inactive. Thus, the burst associated with slot S6 includes the particular coded bit pattern. Thus, the slots S4, S5, S7 are allocated/configured in sequence and the slot S6 is avoided.

A fourth embodiment of the present invention arranges all active timeslots in descending order of interference and then performs channel allocation/allocation based on these interference levels.

Preferably, the transmitter periodically performs interference measurements in each timeslot to obtain the amount of interference and transmits this information to the receiver. When the slots are arranged based on the interference level, the slots with the least interference are filled first, and the slots with the most interference are filled last. The interference information (or permutation) may be in a field of the data burst, transmitted by the transmitter to the receiver, or otherwise generate a new field, for example: such as the data field one shown in fig. 6A, the data field two shown in fig. 6B, or the intermediate field shown in fig. 6C.

The measurements used to arrange the timeslots are readily known to those skilled in the art, such as: in a third generation mobile communication (3G) system, Channel Quality (CQ) measurements are sent between a Radio Network Controller (RNC), a Radio Network Server (RNS), and a node B. The node B may also use higher layer signaling as long as acknowledgements can prioritize the channel allocation/configuration.

Fig. 6D is a diagram showing time slot allocation/configuration using the method of the fourth embodiment. In this example, assume that: slot S6 is with the least amount of interference, slot S5 is with the second least amount of interference, slot S7 is with the third least amount of interference, and slot S4 is with the greatest amount of interference. Therefore, the present embodiment fills the slots in the following order: s6, S5, S7, S4, as shown in fig. 6D.

A fifth embodiment according to the invention is able to generate an even data distribution over all time slots. In this embodiment, referring to fig. 7A, a Transport Format Combination (TFC) is first selected, and then the corresponding Transport Format Combination Indicator (TFCI) is transmitted in the Transport Format Combination Indicator (TFCI) fields to reduce the data rate evenly in all timeslots to a level where the colliding timeslots can support the data transmission. This embodiment is the easiest solution known, since the Transport Format Combination Indicators (TFCIs) transmitted are the same as those in the conventional art. However, the system must also allocate/configure time slots and codes to enable the data to be evenly distributed in all time slots.

The time slot allocation/configuration shown in fig. 7B may be obtained according to the fifth embodiment method. The codes are allocated so that the data is evenly distributed over all slots, as shown. This embodiment also has the additional advantage that: no new fields are required and no synchronization activity needs to be performed between the transmitter and the receiver to generate a notification of active or inactive time slots since all time slots are active.

As shown in fig. 8A, in a sixth embodiment according to the present invention, this inactive time slot and all time slots thereafter are not used to transmit any information. This Transport Format Combination Indicator (TFCI) is used to convey which slots should be used. However, when this User Equipment (UE) calculates that: the maximum allowable power will exceed the standard in a particular time slot, such as time slot S5, and this time slot and all time slots thereafter will not be used.

The result of the sixth embodiment is the time slot allocation/configuration shown in fig. 8B. In this example, assume that: the time slot S5 is the inactive time slot. Thus, since these colliding slots and all slots thereafter are discarded, only slot S4 is available for use and only codes a1 through a5 are available for allocation/configuration.

In an alternative embodiment of the present embodiment, this inactive time slot can still be made available, albeit with less capacity. As shown in fig. 8C, less codes may be assigned to the timeslot to reduce the load on the timeslot.

A general description of various embodiments of the invention is set forth in table one below.

It should be noted that one disadvantage of implementing the present invention is: the location of this Transport Format Combination Indicator (TFCI), and control information for the active and inactive slots (hereinafter referred to as "slot information"). Since the Transport Format Combination Indicator (TFCI) is typically only present in certain slots, the present invention may have a communication that uses a total of five slots, but only specifies slot 2 (or slots 1 and 4) to have the Transport Format Combination Indicator (TFCI) and/or the slot information. The Transport Format Combination Indicator (TFCI) and the slot information are required to synchronize the transmitter and the receiver in the processing of the data. However, the present invention may also be embodied in cases where only those slots having the Transport Format Combination Indicator (TFCI) or the slot information become slots exceeding the maximum allowable transmission power.

According to the first four embodiments of the present invention and as described with reference to fig. 3A-6D, the communication fails if the Transport Format Combination Indicator (TFCI) or the slot information is only present in the slots designated as inactive.

One solution to this problem is: when data loss is a large consideration, the Transport Format Combination Indicator (TFCI) and the slot information are placed in at least two slots and, as far as possible, in each used slot. This step will ensure that: when the receiver receives a slot, the receiver also receives the Transport Format Combination Indicator (TFCI) along with the slot information.

According to the fifth and sixth embodiments of the present invention and as described with reference to fig. 7A to 8C, this Transport Format Combination Indicator (TFCI) does not occur. According to the fifth embodiment, although the data rate is reduced, all timeslots are still continuously used and the Transport Format Combination Indicator (TFCI) and the timeslot information are also available at any time. The sixth embodiment always keeps the Transport Format Combination Indicator (TFCI) and the slot information in the first slot.

It should be noted that although the present invention has been described in detail above with reference to the uplink, the present invention is equally applicable to the downlink; it is also contemplated and within the scope of the invention to apply the teachings of these embodiments to both the uplink and downlink.

Although the present invention has been described in terms of preferred embodiments, those skilled in the art will recognize that many changes may be made thereto without departing from the spirit and scope of the present invention, which is set forth in the following claims.

Examples	Drawing	General description of the invention
			First embodiment	FIGS. 3A to 3E	A new control field is added to one or both of the data fields or intermediate fields to indicate active and/or inactive time slots.
Second embodiment	FIGS. 4A to 4D	One or both transport format combination pointer (TFCI) fields are adjusted to indicate active and/or inactive slots.
			Third embodiment	FIG. 5F to FIG. 3	Adding a coded bit pattern to all inactive time slots.

	5G
			Fourth embodiment	FIGS. 6A to 6D	Arranging the time slots in descending interference order; and those slots with the least interference are used first.
Fifth embodiment	Drawing (A)7A to 7B	A Transport Format Combination (TFC) is selected so that the colliding slots can support a lower data rate and the resource allocation for all slots is averaged.
			Sixth embodiment	FIG. 8A to FIG. 8B	The maximum power of each specific slot is determined. The resource unit will not be applied on the time slot exceeding the maximum allowable power and all time slots thereafter.

Claims (21)

1. A User Equipment (UE) for supporting a communication using a wireless hybrid Time Division Multiple Access (TDMA)/Code Division Multiple Access (CDMA) format by selecting and applying at least one time slot of a plurality of available time slots and at least one code of a plurality of codes, the UE comprising:

means for calculating the power required to transmit data for each available time slot;

means for determining whether the calculated power for each timeslot exceeds a threshold;

means for removing timeslots exceeding the threshold from the available timeslots to determine remaining timeslots;

means for sending an identifier of the remaining timeslots to another communication unit; and

means for using the remaining time slots and the codes within the remaining time slots to support the communication.

2. The User Equipment (UE) of claim 1, wherein said means for transmitting further comprises:

apparatus for using a burst of data, said burst of data comprising first and second data fields separated by an intermediate field and followed by a watchdog period.

3. The User Equipment (UE) of claim 2, wherein said identifier lists said remaining time slots.

4. The User Equipment (UE) of claim 2 wherein said identifier lists said excess time slots.

5. The User Equipment (UE) of claim 2 wherein said identifier lists said remaining and exceeding time slots.

6. The User Equipment (UE) of claim 3, wherein the identifier is located within at least one of the data fields.

7. The User Equipment (UE) of claim 3, wherein the identifier is located within the middle field.

8. The User Equipment (UE) of claim 2 wherein said data burst further comprises two Transport Format Combination Indicator (TFCI) fields placed before and after said middle field, respectively.

9. The User Equipment (UE) of claim 8 wherein said identifier is located within at least one transport format combination pointer (TFCI) field of said transport format combination pointer (TFCI) fields.

10. The User Equipment (UE) of claim 1, wherein the codes are allocated sequentially.

11. A User Equipment (UE) for implementing dynamic link adaptation in a time division duplex communication format by transmitting timeslot and code allocation information in a data burst having a plurality of fields including two data fields separated by a middle field, the UE comprising:

means for transmitting an indication of timeslots to be used in at least one of said fields; and

means for assigning codes to said used time slots in a sequential order until all codes have been assigned.

12. The User Equipment (UE) of claim 11, wherein the indication is transmitted within at least one field of the data field.

13. The User Equipment (UE) of claim 11, wherein the indication is transmitted within the middle field.

14. The User Equipment (UE) of claim 11 wherein said data burst further includes first and second Transport Format Combination Indicator (TFCI) fields, said first Transport Format Combination Indicator (TFCI) field being located before said middle field and said second Transport Format Combination Indicator (TFCI) field being located after said middle field, whereby said indication is transmitted in at least one of said Transport Format Combination Indicator (TFCI) fields.

15. A User Equipment (UE) that utilizes at least one timeslot of a plurality of available timeslots and at least one code of a plurality of codes to transmit code and timeslot assignments to support a communication of a user in a wireless hybrid Time Division Multiple Access (TDMA)/Code Division Multiple Access (CDMA) communication format, the UE comprising:

means for calculating the power required to transmit data for each available time slot;

means for determining whether the calculated power for each timeslot exceeds a predetermined threshold;

means for loading information to support the user communication in a first set of timeslots that do not exceed the predetermined threshold:

means for loading a coded bit pattern in a second set of timeslots exceeding the predetermined threshold;

means for sending the first and second sets of timeslots to another communication unit; and

means for using the information of the first set of time slots to support the communication.

16. The User Equipment (UE) of claim 15, wherein said loading means uses a consecutive encoding of said plurality of encodings.

17. A Time Division Duplex (TDD) User Equipment (UE) that supports user communications between the UE and a second unit by transmitting a plurality of timeslots, each timeslot capable of supporting at least one code, whereby timeslot and code allocation information is communicated using a plurality of data burst, each data burst having a plurality of fields including two data fields separated by a middle field, the UE comprising:

means for determining an amount of interference in each time slot;

means for prioritizing the timeslots based on the amount of interference, wherein the timeslot with the least amount of interference has the highest priority; and

means for assigning codes to time slots according to said priority, whereby the time slot with the highest priority is assigned earliest.

18. The User Equipment (UE) of claim 17 wherein the means for assigning assigns codes sequentially within each time slot.

19. A User Equipment (UE) that transmits codes and slot assignments in a Time Division Duplex (TDD) communication format, the UE communicating with at least a second unit using at least one of a plurality of available slots and at least one of a plurality of codes for each of the plurality of available slots, the UE comprising:

means for calculating the power required to transmit data for each available time slot;

means for determining whether the calculated power exceeds a threshold;

means for removing timeslots exceeding the threshold from the available timeslots to determine remaining timeslots;

means for transmitting an identifier of the remaining time slots; and

means for using the remaining time slots to support the communication.

20. The User Equipment (UE) of claim 19 wherein the at least one code comprises a plurality of codes and wherein the means for using uses the codes sequentially.

21. A User Equipment (UE) for implementing dynamic link adaptation in a Time Division Duplex (TDD) communication format by transmitting timeslot and code allocation information in a data burst having a plurality of fields including two data fields separated by a middle field, the UE comprising:

means for determining an inactive time slot and an active time slot;

means for transmitting an indication of active slots in at least one of the fields; and

means for sequentially assigning codes to active time slots until all codes have been assigned.